AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/06/26 18:09	flow	patch-triage	2m Args: null Results: { "EnableConfigs": [ "NF_CONNTRACK", "NF_CT_NETLINK", "NETFILTER_NETLINK_QUEUE", "NETFILTER_NETLINK_GLUE_CT", "NETFILTER_ADVANCED", "NF_CT_NETLINK_HELPER", "NF_CONNTRACK_AMANDA", "NF_CONNTRACK_FTP", "NF_CONNTRACK_H323", "NF_CONNTRACK_IRC", "NF_CONNTRACK_NETBIOS_NS", "NF_CONNTRACK_PPTP", "NF_CONNTRACK_SANE", "NF_CONNTRACK_SIP", "NF_CONNTRACK_TFTP", "NF_CONNTRACK_SNMP", "NF_NAT", "NF_NAT_SNMP_BASIC", "OPENVSWITCH", "NET_ACT_CT" ], "FocusSymbols": [ "__nf_conntrack_helper_register", "__nf_conntrack_helper_find", "nf_ct_helper_init", "nfnl_cthelper_new", "nfnl_cthelper_get", "nfnl_cthelper_del", "nfnl_cthelper_create", "nf_ct_helper", "nf_conntrack_broadcast_help" ], "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.", "WorthFuzzing": true }
1/1	2026/06/26 18:09	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 99dcd6c31c7d32b78fd940a0ab0080117e42408b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Fri Jun 26 18:09:29 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h\nindex 81286c49932521..b15f37604cde4e 100644\n--- a/include/linux/netfilter/nf_conntrack_h323.h\n+++ b/include/linux/netfilter/nf_conntrack_h323.h\n@@ -9,8 +9,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n #include \u003cuapi/linux/netfilter/nf_conntrack_tuple_common.h\u003e\n \n-#define RAS_PORT 1719\n-#define Q931_PORT 1720\n #define H323_RTP_CHANNEL_MAX 4\t/* Audio, video, FAX and other /\n \n / This structure exists only once per master /\ndiff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h\nindex c3bdb43709384d..c0b305ce7c3c6b 100644\n--- a/include/linux/netfilter/nf_conntrack_pptp.h\n+++ b/include/linux/netfilter/nf_conntrack_pptp.h\n@@ -50,8 +50,6 @@ struct nf_nat_pptp {\n \t__be16 pac_call_id;\t\t\t/ NAT'ed PAC call id /\n };\n \n-#define PPTP_CONTROL_PORT\t1723\n-\n #define PPTP_PACKET_CONTROL\t1\n #define PPTP_PACKET_MGMT\t2\n \ndiff --git a/include/linux/netfilter/nf_conntrack_sane.h b/include/linux/netfilter/nf_conntrack_sane.h\nindex 46c7acd1b4a70f..8501035d733559 100644\n--- a/include/linux/netfilter/nf_conntrack_sane.h\n+++ b/include/linux/netfilter/nf_conntrack_sane.h\n@@ -3,8 +3,6 @@\n #define _NF_CONNTRACK_SANE_H\n / SANE tracking. /\n \n-#define SANE_PORT\t6566\n-\n enum sane_state {\n \tSANE_STATE_NORMAL,\n \tSANE_STATE_START_REQUESTED,\ndiff --git a/include/linux/netfilter/nf_conntrack_tftp.h b/include/linux/netfilter/nf_conntrack_tftp.h\nindex 90b334bbce3ce6..e3d1739c557d15 100644\n--- a/include/linux/netfilter/nf_conntrack_tftp.h\n+++ b/include/linux/netfilter/nf_conntrack_tftp.h\n@@ -2,8 +2,6 @@\n #ifndef _NF_CONNTRACK_TFTP_H\n #define _NF_CONNTRACK_TFTP_H\n \n-#define TFTP_PORT 69\n-\n #include \u003clinux/netfilter.h\u003e\n #include \u003clinux/skbuff.h\u003e\n #include \u003clinux/types.h\u003e\ndiff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h\nindex c761cd8158b253..bc5427d239f4c0 100644\n--- a/include/net/netfilter/nf_conntrack_helper.h\n+++ b/include/net/netfilter/nf_conntrack_helper.h\n@@ -43,11 +43,10 @@ struct nf_conntrack_helper {\n \n \trefcount_t ct_refcnt;\n \n-\t/ Tuple of things we will help (compared against server response) /\n-\tstruct nf_conntrack_tuple tuple;\n+\tu8 nfproto;\t/ NFPROTO_, can be NFPROTO_UNSPEC /\n+\tu8 l4proto;\t/* IPPROTO_UDP/TCP /\n \n-\t/ Function to call when data passes; return verdict, or -1 to\n- invalidate. /\n+\t/ Function to call when data passes; return verdict /\n \tint __rcu (help)(struct sk_buff skb, unsigned int protoff,\n \t\t\t struct nf_conn ct,\n \t\t\t enum ip_conntrack_info conntrackinfo);\n@@ -94,8 +93,7 @@ struct nf_conntrack_helper nf_conntrack_helper_try_module_get(const char name,\n void nf_conntrack_helper_put(struct nf_conntrack_helper helper);\n \n void nf_ct_helper_init(struct nf_conntrack_helper helper,\n-\t\t u16 l3num, u16 protonum, const char name,\n-\t\t u16 default_port, u16 spec_port, u32 id,\n+\t\t u8 l3num, u16 protonum, const char name,\n \t\t const struct nf_conntrack_expect_policy exp_pol,\n \t\t u32 expect_class_max,\n \t\t int (help)(struct sk_buff skb, unsigned int protoff,\ndiff --git a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\nindex 0ede138dfd29e7..e540b86bd15b6b 100644\n--- a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\n+++ b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\n@@ -213,7 +213,7 @@ static int __init nf_nat_snmp_basic_init(void)\n \tRCU_INIT_POINTER(nf_nat_snmp_hook, help);\n \n \tnf_ct_helper_init(\u0026snmp_trap_helper, AF_INET, IPPROTO_UDP,\n-\t\t\t \"snmp_trap\", SNMP_TRAP_PORT, SNMP_TRAP_PORT, SNMP_TRAP_PORT,\n+\t\t\t \"snmp_trap\",\n \t\t\t \u0026snmp_exp_policy, 0, help, NULL, THIS_MODULE);\n \n \terr = nf_conntrack_helper_register(\u0026snmp_trap_helper, \u0026snmp_trap_helper_ptr);\ndiff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c\nindex ddafbdfc96dc35..edced039970d48 100644\n--- a/net/netfilter/nf_conntrack_amanda.c\n+++ b/net/netfilter/nf_conntrack_amanda.c\n@@ -199,10 +199,10 @@ static int __init nf_conntrack_amanda_init(void)\n \t}\n \n \tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\n-\t\t\t HELPER_NAME, 10080, 10080, 10080,\n+\t\t\t HELPER_NAME,\n \t\t\t \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\n-\t\t\t HELPER_NAME, 10080, 10080, 10080,\n+\t\t\t HELPER_NAME,\n \t\t\t \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\n \n \tret = nf_conntrack_helpers_register(amanda_helper,\ndiff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c\nindex bf78828c7549d4..6ff954f1bfb87c 100644\n--- a/net/netfilter/nf_conntrack_broadcast.c\n+++ b/net/netfilter/nf_conntrack_broadcast.c\n@@ -66,8 +66,6 @@ int nf_conntrack_broadcast_help(struct sk_buff skb,\n \texp-\u003etuple = ct-\u003etuplehash[IP_CT_DIR_REPLY].tuple;\n \n \thelper = rcu_dereference(help-\u003ehelper);\n-\tif (helper)\n-\t\texp-\u003etuple.src.u.udp.port = helper-\u003etuple.src.u.udp.port;\n \n \texp-\u003emask.src.u3.ip = mask;\n \texp-\u003emask.src.u.udp.port = htons(0xFFFF);\ndiff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c\nindex 0847f845613d6a..f3944598c1726f 100644\n--- a/net/netfilter/nf_conntrack_ftp.c\n+++ b/net/netfilter/nf_conntrack_ftp.c\n@@ -35,11 +35,6 @@ MODULE_ALIAS(\"ip_conntrack_ftp\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n static DEFINE_SPINLOCK(nf_ftp_lock);\n \n-#define MAX_PORTS 8\n-static u_int16_t ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-\n static bool loose;\n module_param(loose, bool, 0600);\n \n@@ -560,8 +555,8 @@ static int nf_ct_ftp_from_nlattr(struct nlattr attr, struct nf_conn ct)\n \treturn 0;\n }\n \n-static struct nf_conntrack_helper ftp[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper ftp_ptr[MAX_PORTS 2] __read_mostly;\n+static struct nf_conntrack_helper ftp __read_mostly;\n+static struct nf_conntrack_helper ftp_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy ftp_exp_policy = {\n \t.max_expected\t= 1,\n@@ -570,32 +565,23 @@ static const struct nf_conntrack_expect_policy ftp_exp_policy = {\n \n static void __exit nf_conntrack_ftp_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(ftp_ptr, ports_c 2);\n+\tnf_conntrack_helper_unregister(ftp_ptr);\n }\n \n static int __init nf_conntrack_ftp_init(void)\n {\n-\tint i, ret = 0;\n+\tint ret = 0;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_ftp_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = FTP_PORT;\n-\n \t/* FIXME should be configurable whether IPv4 and IPv6 FTP connections\n \t\t are tracked or not - YK /\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026ftp[2 i], AF_INET, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, FTP_PORT, ports[i], ports[i],\n-\t\t\t\t \u0026ftp_exp_policy, 0, help,\n-\t\t\t\t nf_ct_ftp_from_nlattr, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026ftp[2 * i + 1], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, FTP_PORT, ports[i], ports[i],\n-\t\t\t\t \u0026ftp_exp_policy, 0, help,\n-\t\t\t\t nf_ct_ftp_from_nlattr, THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026ftp, NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t HELPER_NAME,\n+\t\t\t \u0026ftp_exp_policy, 0, help,\n+\t\t\t nf_ct_ftp_from_nlattr, THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(ftp, ports_c * 2, ftp_ptr);\n+\tret = nf_conntrack_helper_register(\u0026ftp, \u0026ftp_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c\nindex 24931e379985bb..98b9753d5e65e1 100644\n--- a/net/netfilter/nf_conntrack_h323_main.c\n+++ b/net/netfilter/nf_conntrack_h323_main.c\n@@ -1713,19 +1713,19 @@ static int __init h323_helper_init(void)\n \tint ret;\n \n \tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP,\n-\t\t\t \"RAS\", RAS_PORT, RAS_PORT, RAS_PORT,\n+\t\t\t \"RAS\",\n \t\t\t \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP,\n-\t\t\t \"RAS\", RAS_PORT, RAS_PORT, RAS_PORT,\n+\t\t\t \"RAS\",\n \t\t\t \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP,\n-\t\t\t \"H.245\", 0, 0, 0,\n+\t\t\t \"H.245\",\n \t\t\t \u0026h245_exp_policy, 0, h245_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP,\n-\t\t\t \"Q.931\", Q931_PORT, Q931_PORT, Q931_PORT,\n+\t\t\t \"Q.931\",\n \t\t\t \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP,\n-\t\t\t \"Q.931\", Q931_PORT, Q931_PORT, Q931_PORT,\n+\t\t\t \"Q.931\",\n \t\t\t \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\n \n \tret = nf_conntrack_helper_register(\u0026nf_conntrack_helper_h245,\ndiff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c\nindex 500509b17663ed..506c5803476155 100644\n--- a/net/netfilter/nf_conntrack_helper.c\n+++ b/net/netfilter/nf_conntrack_helper.c\n@@ -40,12 +40,16 @@ static unsigned int nf_ct_helper_count __read_mostly;\n static DEFINE_MUTEX(nf_ct_nat_helpers_mutex);\n static struct list_head nf_ct_nat_helpers __read_mostly;\n \n-/* Stupid hash, but collision free for the default registrations of the\n- * helpers currently in the kernel. /\n-static unsigned int helper_hash(const struct nf_conntrack_tuple tuple)\n+static unsigned int helper_hash(const char name, u8 protonum)\n {\n-\treturn (((tuple-\u003esrc.l3num \u003c\u003c 8) \| tuple-\u003edst.protonum) ^\n-\t\t(__force __u16)tuple-\u003esrc.u.all) % nf_ct_helper_hsize;\n+\tstatic u32 seed;\n+\tu32 initval;\n+\n+\tget_random_once(\u0026seed, sizeof(seed));\n+\n+\tinitval = seed ^ protonum;\n+\n+\treturn jhash(name, strlen(name), initval) % nf_ct_helper_hsize;\n }\n \n struct nf_conntrack_helper \n@@ -54,18 +58,18 @@ __nf_conntrack_helper_find(const char name, u16 l3num, u8 protonum)\n \tstruct nf_conntrack_helper h;\n \tunsigned int i;\n \n-\tfor (i = 0; i \u003c nf_ct_helper_hsize; i++) {\n-\t\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\n-\t\t\tif (strcmp(h-\u003ename, name))\n-\t\t\t\tcontinue;\n+\tif (!nf_ct_helper_hash)\n+\t\treturn NULL;\n \n-\t\t\tif (h-\u003etuple.src.l3num != NFPROTO_UNSPEC \u0026\u0026\n-\t\t\t h-\u003etuple.src.l3num != l3num)\n-\t\t\t\tcontinue;\n+\ti = helper_hash(name, protonum);\n \n-\t\t\tif (h-\u003etuple.dst.protonum == protonum)\n-\t\t\t\treturn h;\n-\t\t}\n+\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\n+\t\tif (strcmp(h-\u003ename, name))\n+\t\t\tcontinue;\n+\t\tif (h-\u003enfproto != NFPROTO_UNSPEC \u0026\u0026 h-\u003enfproto != l3num)\n+\t\t\tcontinue;\n+\t\tif (h-\u003el4proto == protonum)\n+\t\t\treturn h;\n \t}\n \treturn NULL;\n }\n@@ -363,9 +367,8 @@ EXPORT_SYMBOL_GPL(nf_ct_helper_log);\n \n int __nf_conntrack_helper_register(struct nf_conntrack_helper me)\n {\n-\tstruct nf_conntrack_tuple_mask mask = { .src.u.all = htons(0xFFFF) };\n-\tunsigned int h = helper_hash(\u0026me-\u003etuple);\n \tstruct nf_conntrack_helper cur;\n+\tunsigned int h;\n \tint ret = 0, i;\n \n \tBUG_ON(me-\u003eexpect_class_max \u003e= NF_CT_MAX_EXPECT_CLASSES);\n@@ -382,29 +385,18 @@ int __nf_conntrack_helper_register(struct nf_conntrack_helper me)\n \t\t\treturn -EINVAL;\n \t}\n \n+\th = helper_hash(me-\u003ename, me-\u003el4proto);\n \tmutex_lock(\u0026nf_ct_helper_mutex);\n-\tfor (i = 0; i \u003c nf_ct_helper_hsize; i++) {\n-\t\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[i], hnode) {\n-\t\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n-\t\t\t (cur-\u003etuple.src.l3num == NFPROTO_UNSPEC \|\|\n-\t\t\t cur-\u003etuple.src.l3num == me-\u003etuple.src.l3num) \u0026\u0026\n-\t\t\t cur-\u003etuple.dst.protonum == me-\u003etuple.dst.protonum) {\n-\t\t\t\tret = -EBUSY;\n-\t\t\t\tgoto out;\n-\t\t\t}\n+\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\n+\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n+\t\t (cur-\u003enfproto == NFPROTO_UNSPEC \|\|\n+\t\t cur-\u003enfproto == me-\u003enfproto) \u0026\u0026\n+\t\t cur-\u003el4proto == me-\u003el4proto) {\n+\t\t\tret = -EBUSY;\n+\t\t\tgoto out;\n \t\t}\n \t}\n \n-\t/ avoid unpredictable behaviour for auto_assign_helper /\n-\tif (!(me-\u003eflags \u0026 NF_CT_HELPER_F_USERSPACE)) {\n-\t\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\n-\t\t\tif (nf_ct_tuple_src_mask_cmp(\u0026cur-\u003etuple, \u0026me-\u003etuple,\n-\t\t\t\t\t\t \u0026mask)) {\n-\t\t\t\tret = -EBUSY;\n-\t\t\t\tgoto out;\n-\t\t\t}\n-\t\t}\n-\t}\n \trefcount_set(\u0026me-\u003ect_refcnt, 1);\n \thlist_add_head_rcu(\u0026me-\u003ehnode, \u0026nf_ct_helper_hash[h]);\n \tnf_ct_helper_count++;\n@@ -479,8 +471,7 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper me)\n EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);\n \n void nf_ct_helper_init(struct nf_conntrack_helper helper,\n-\t\t u16 l3num, u16 protonum, const char name,\n-\t\t u16 default_port, u16 spec_port, u32 id,\n+\t\t u8 l3num, u16 protonum, const char name,\n \t\t const struct nf_conntrack_expect_policy exp_pol,\n \t\t u32 expect_class_max,\n \t\t int (help)(struct sk_buff skb, unsigned int protoff,\n@@ -492,9 +483,8 @@ void nf_ct_helper_init(struct nf_conntrack_helper helper,\n {\n \tmemset(helper, 0, sizeof(helper));\n \n-\thelper-\u003etuple.src.l3num = l3num;\n-\thelper-\u003etuple.dst.protonum = protonum;\n-\thelper-\u003etuple.src.u.all = htons(spec_port);\n+\thelper-\u003enfproto = l3num;\n+\thelper-\u003el4proto = protonum;\n \n \trcu_assign_pointer(helper-\u003ehelp, help);\n \thelper-\u003efrom_nlattr = from_nlattr;\n@@ -502,10 +492,7 @@ void nf_ct_helper_init(struct nf_conntrack_helper helper,\n \tsnprintf(helper-\u003enat_mod_name, sizeof(helper-\u003enat_mod_name),\n \t\t NF_NAT_HELPER_PREFIX \"%s\", name);\n \n-\tif (spec_port == default_port)\n-\t\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s\", name);\n-\telse\n-\t\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s-%u\", name, id);\n+\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s\", name);\n \n \tif (WARN_ON_ONCE(expect_class_max \u003e= NF_CT_MAX_EXPECT_CLASSES))\n \t\treturn;\ndiff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c\nindex 193ab34db795f9..4e6bafe4143752 100644\n--- a/net/netfilter/nf_conntrack_irc.c\n+++ b/net/netfilter/nf_conntrack_irc.c\n@@ -21,9 +21,6 @@\n #include \u003cnet/netfilter/nf_conntrack_helper.h\u003e\n #include \u003clinux/netfilter/nf_conntrack_irc.h\u003e\n \n-#define MAX_PORTS 8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n static unsigned int max_dcc_channels = 8;\n static unsigned int dcc_timeout __read_mostly = 300;\n / This is slow, but it's simple. --RR /\n@@ -42,8 +39,6 @@ MODULE_LICENSE(\"GPL\");\n MODULE_ALIAS(\"ip_conntrack_irc\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"port numbers of IRC servers\");\n module_param(max_dcc_channels, uint, 0400);\n MODULE_PARM_DESC(max_dcc_channels, \"max number of expected DCC channels per \"\n \t\t\t\t \"IRC session\");\n@@ -254,13 +249,13 @@ static int help(struct sk_buff skb, unsigned int protoff,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper irc[MAX_PORTS] __read_mostly;\n-static struct nf_conntrack_helper irc_ptr[MAX_PORTS] __read_mostly;\n+static struct nf_conntrack_helper irc __read_mostly;\n+static struct nf_conntrack_helper irc_ptr __read_mostly;\n static struct nf_conntrack_expect_policy irc_exp_policy;\n \n static int __init nf_conntrack_irc_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tnf_conntrack_helper_deprecated(HELPER_NAME);\n \n@@ -282,17 +277,11 @@ static int __init nf_conntrack_irc_init(void)\n \tif (!irc_buffer)\n \t\treturn -ENOMEM;\n \n-\t/* If no port given, default to standard irc port /\n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = IRC_PORT;\n+\tnf_ct_helper_init(\u0026irc, AF_INET, IPPROTO_TCP, HELPER_NAME,\n+\t\t\t \u0026irc_exp_policy,\n+\t\t\t 0, help, NULL, THIS_MODULE);\n \n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026irc[i], AF_INET, IPPROTO_TCP, HELPER_NAME,\n-\t\t\t\t IRC_PORT, ports[i], i, \u0026irc_exp_policy,\n-\t\t\t\t 0, help, NULL, THIS_MODULE);\n-\t}\n-\n-\tret = nf_conntrack_helpers_register(\u0026irc[0], ports_c, irc_ptr);\n+\tret = nf_conntrack_helper_register(\u0026irc, \u0026irc_ptr);\n \tif (ret) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\tkfree(irc_buffer);\n@@ -304,7 +293,7 @@ static int __init nf_conntrack_irc_init(void)\n \n static void __exit nf_conntrack_irc_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(irc_ptr, ports_c);\n+\tnf_conntrack_helper_unregister(irc_ptr);\n \tkfree(irc_buffer);\n }\n \ndiff --git a/net/netfilter/nf_conntrack_netbios_ns.c b/net/netfilter/nf_conntrack_netbios_ns.c\nindex 89d1cf7d6512e7..caa2b101fa9e5e 100644\n--- a/net/netfilter/nf_conntrack_netbios_ns.c\n+++ b/net/netfilter/nf_conntrack_netbios_ns.c\n@@ -21,7 +21,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n \n #define HELPER_NAME\t\"netbios-ns\"\n-#define NMBD_PORT\t137\n \n MODULE_AUTHOR(\"Patrick McHardy \u003ckaber@trash.net\u003e\");\n MODULE_DESCRIPTION(\"NetBIOS name service broadcast connection tracking helper\");\n@@ -54,7 +53,6 @@ static int __init nf_conntrack_netbios_ns_init(void)\n \texp_policy.timeout = timeout;\n \n \tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP, HELPER_NAME,\n-\t\t\t NMBD_PORT, NMBD_PORT, NMBD_PORT,\n \t\t\t \u0026exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE);\n \n \treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\ndiff --git a/net/netfilter/nf_conntrack_ovs.c b/net/netfilter/nf_conntrack_ovs.c\nindex 49d1511e992185..b4085af3ad1ce0 100644\n--- a/net/netfilter/nf_conntrack_ovs.c\n+++ b/net/netfilter/nf_conntrack_ovs.c\n@@ -31,8 +31,8 @@ int nf_ct_helper(struct sk_buff skb, struct nf_conn ct,\n \tif (!helper)\n \t\treturn NF_ACCEPT;\n \n-\tif (helper-\u003etuple.src.l3num != NFPROTO_UNSPEC \u0026\u0026\n-\t helper-\u003etuple.src.l3num != proto)\n+\tif (helper-\u003enfproto != NFPROTO_UNSPEC \u0026\u0026\n+\t helper-\u003enfproto != proto)\n \t\treturn NF_ACCEPT;\n \n \tswitch (proto) {\n@@ -60,7 +60,7 @@ int nf_ct_helper(struct sk_buff skb, struct nf_conn ct,\n \t\treturn NF_DROP;\n \t}\n \n-\tif (helper-\u003etuple.dst.protonum != proto)\n+\tif (helper-\u003el4proto != proto)\n \t\treturn NF_ACCEPT;\n \n \thelper_cb = rcu_dereference(helper-\u003ehelp);\ndiff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c\nindex 80fc14c87ddc4b..cbf32a3cb1f612 100644\n--- a/net/netfilter/nf_conntrack_pptp.c\n+++ b/net/netfilter/nf_conntrack_pptp.c\n@@ -540,7 +540,7 @@ static int __init nf_conntrack_pptp_init(void)\n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_pptp_master));\n \n \tnf_ct_helper_init(\u0026pptp, AF_INET, IPPROTO_TCP,\n-\t\t\t \"pptp\", PPTP_CONTROL_PORT, PPTP_CONTROL_PORT, PPTP_CONTROL_PORT,\n+\t\t\t \"pptp\",\n \t\t\t \u0026pptp_exp_policy, 0, conntrack_pptp_help, NULL, THIS_MODULE);\n \n \tpptp.destroy = gre_pptp_destroy_siblings;\ndiff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c\nindex 39085acf7a7185..a0658f69d78fbb 100644\n--- a/net/netfilter/nf_conntrack_sane.c\n+++ b/net/netfilter/nf_conntrack_sane.c\n@@ -34,11 +34,6 @@ MODULE_AUTHOR(\"Michal Schmidt \u003cmschmidt@redhat.com\u003e\");\n MODULE_DESCRIPTION(\"SANE connection tracking helper\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS 8\n-static u_int16_t ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-\n struct sane_request {\n \t__be32 RPC_code;\n #define SANE_NET_START 7 / RPC code /\n@@ -169,8 +164,8 @@ static int help(struct sk_buff skb,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper sane[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper sane_ptr[MAX_PORTS 2] __read_mostly;\n+static struct nf_conntrack_helper sane __read_mostly;\n+static struct nf_conntrack_helper sane_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy sane_exp_policy = {\n \t.max_expected\t= 1,\n@@ -179,32 +174,21 @@ static const struct nf_conntrack_expect_policy sane_exp_policy = {\n \n static void __exit nf_conntrack_sane_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(sane_ptr, ports_c 2);\n+\tnf_conntrack_helper_unregister(sane_ptr);\n }\n \n static int __init nf_conntrack_sane_init(void)\n {\n-\tint i, ret = 0;\n+\tint ret = 0;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sane_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = SANE_PORT;\n-\n-\t/* FIXME should be configurable whether IPv4 and IPv6 connections\n-\t\t are tracked or not - YK /\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026sane[2 i], AF_INET, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, SANE_PORT, ports[i], ports[i],\n-\t\t\t\t \u0026sane_exp_policy, 0, help, NULL,\n-\t\t\t\t THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sane[2 * i + 1], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, SANE_PORT, ports[i], ports[i],\n-\t\t\t\t \u0026sane_exp_policy, 0, help, NULL,\n-\t\t\t\t THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026sane, NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t HELPER_NAME,\n+\t\t\t \u0026sane_exp_policy, 0, help, NULL,\n+\t\t\t THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(sane, ports_c * 2, sane_ptr);\n+\tret = nf_conntrack_helper_register(\u0026sane, \u0026sane_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c\nindex 5ec3a4a4bbd707..d0b85b8ad1e6d8 100644\n--- a/net/netfilter/nf_conntrack_sip.c\n+++ b/net/netfilter/nf_conntrack_sip.c\n@@ -35,12 +35,6 @@ MODULE_DESCRIPTION(\"SIP connection tracking helper\");\n MODULE_ALIAS(\"ip_conntrack_sip\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS\t8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"port numbers of SIP servers\");\n-\n static unsigned int sip_timeout __read_mostly = SIP_TIMEOUT;\n module_param(sip_timeout, uint, 0600);\n MODULE_PARM_DESC(sip_timeout, \"timeout for the master SIP session\");\n@@ -1764,8 +1758,8 @@ static int sip_help_udp(struct sk_buff skb, unsigned int protoff,\n \treturn process_sip_msg(skb, ct, protoff, dataoff, \u0026dptr, \u0026datalen);\n }\n \n-static struct nf_conntrack_helper sip[MAX_PORTS 4] __read_mostly;\n-static struct nf_conntrack_helper sip_ptr[MAX_PORTS 4] __read_mostly;\n+static struct nf_conntrack_helper sip[2] __read_mostly;\n+static struct nf_conntrack_helper sip_ptr[2] __read_mostly;\n \n static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1] = {\n \t[SIP_EXPECT_SIGNALLING] = {\n@@ -1792,38 +1786,25 @@ static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1\n \n static void __exit nf_conntrack_sip_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(sip_ptr, ports_c 4);\n+\tnf_conntrack_helpers_unregister(sip_ptr, 2);\n }\n \n static int __init nf_conntrack_sip_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sip_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = SIP_PORT;\n-\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026sip[4 * i], AF_INET, IPPROTO_UDP,\n-\t\t\t\t HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n-\t\t\t\t NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 1], AF_INET, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n-\t\t\t\t NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 2], AF_INET6, IPPROTO_UDP,\n-\t\t\t\t HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n-\t\t\t\t NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 3], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n-\t\t\t\t NULL, THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026sip[0], NFPROTO_UNSPEC, IPPROTO_UDP,\n+\t\t\t HELPER_NAME,\n+\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n+\t\t\t NULL, THIS_MODULE);\n+\tnf_ct_helper_init(\u0026sip[1], NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t HELPER_NAME,\n+\t\t\t sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n+\t\t\t NULL, THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(sip, ports_c * 4, sip_ptr);\n+\tret = nf_conntrack_helpers_register(sip, 2, sip_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_snmp.c b/net/netfilter/nf_conntrack_snmp.c\nindex b6fce5703fce77..109986d5d55e69 100644\n--- a/net/netfilter/nf_conntrack_snmp.c\n+++ b/net/netfilter/nf_conntrack_snmp.c\n@@ -14,8 +14,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n #include \u003clinux/netfilter/nf_conntrack_snmp.h\u003e\n \n-#define SNMP_PORT\t161\n-\n MODULE_AUTHOR(\"Jiri Olsa \u003cjolsa@redhat.com\u003e\");\n MODULE_DESCRIPTION(\"SNMP service broadcast connection tracking helper\");\n MODULE_LICENSE(\"GPL\");\n@@ -55,7 +53,7 @@ static int __init nf_conntrack_snmp_init(void)\n \texp_policy.timeout = timeout;\n \n \tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP,\n-\t\t\t \"snmp\", SNMP_PORT, SNMP_PORT, SNMP_PORT,\n+\t\t\t \"snmp\",\n \t\t\t \u0026exp_policy, 0, snmp_conntrack_help, NULL,\n \t\t\t THIS_MODULE);\n \ndiff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c\nindex 4393c435aa3549..a69559edf9b363 100644\n--- a/net/netfilter/nf_conntrack_tftp.c\n+++ b/net/netfilter/nf_conntrack_tftp.c\n@@ -26,12 +26,6 @@ MODULE_LICENSE(\"GPL\");\n MODULE_ALIAS(\"ip_conntrack_tftp\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS 8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"Port numbers of TFTP servers\");\n-\n nf_nat_tftp_hook_fn __rcu nf_nat_tftp_hook __read_mostly;\n EXPORT_SYMBOL_GPL(nf_nat_tftp_hook);\n \n@@ -95,8 +89,8 @@ static int tftp_help(struct sk_buff skb,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper tftp[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper tftp_ptr[MAX_PORTS 2] __read_mostly;\n+static struct nf_conntrack_helper tftp __read_mostly;\n+static struct nf_conntrack_helper tftp_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy tftp_exp_policy = {\n \t.max_expected\t= 1,\n@@ -105,30 +99,21 @@ static const struct nf_conntrack_expect_policy tftp_exp_policy = {\n \n static void __exit nf_conntrack_tftp_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(tftp_ptr, ports_c 2);\n+\tnf_conntrack_helper_unregister(tftp_ptr);\n }\n \n static int __init nf_conntrack_tftp_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(0);\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = TFTP_PORT;\n-\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026tftp[2 * i], AF_INET, IPPROTO_UDP,\n-\t\t\t\t HELPER_NAME, TFTP_PORT, ports[i], i,\n-\t\t\t\t \u0026tftp_exp_policy, 0, tftp_help, NULL,\n-\t\t\t\t THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026tftp[2 * i + 1], AF_INET6, IPPROTO_UDP,\n-\t\t\t\t HELPER_NAME, TFTP_PORT, ports[i], i,\n-\t\t\t\t \u0026tftp_exp_policy, 0, tftp_help, NULL,\n-\t\t\t\t THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026tftp, NFPROTO_UNSPEC, IPPROTO_UDP,\n+\t\t\t HELPER_NAME,\n+\t\t\t \u0026tftp_exp_policy, 0, tftp_help, NULL,\n+\t\t\t THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(tftp, ports_c * 2, tftp_ptr);\n+\tret = nf_conntrack_helper_register(\u0026tftp, \u0026tftp_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c\nindex f1460b683d7af7..56655cb7fe2ad0 100644\n--- a/net/netfilter/nfnetlink_cthelper.c\n+++ b/net/netfilter/nfnetlink_cthelper.c\n@@ -67,7 +67,7 @@ nfnl_userspace_cthelper(struct sk_buff skb, unsigned int protoff,\n }\n \n static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = {\n-\t[NFCTH_TUPLE_L3PROTONUM] = { .type = NLA_U16, },\n+\t[NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6),\n \t[NFCTH_TUPLE_L4PROTONUM] = { .type = NLA_U8, },\n };\n \n@@ -254,7 +254,8 @@ nfnl_cthelper_create(const struct nlattr const tb[],\n \thelper-\u003edata_len = size;\n \n \thelper-\u003eflags \|= NF_CT_HELPER_F_USERSPACE;\n-\tmemcpy(\u0026helper-\u003etuple, tuple, sizeof(struct nf_conntrack_tuple));\n+\thelper-\u003enfproto = tuple-\u003esrc.l3num;\n+\thelper-\u003el4proto = tuple-\u003edst.protonum;\n \n \thelper-\u003eme = THIS_MODULE;\n \thelper-\u003ehelp = nfnl_userspace_cthelper;\n@@ -449,8 +450,8 @@ static int nfnl_cthelper_new(struct sk_buff skb, const struct nfnl_info info,\n \t\tif (strncmp(cur-\u003ename, helper_name, NF_CT_HELPER_NAME_LEN))\n \t\t\tcontinue;\n \n-\t\tif ((tuple.src.l3num != cur-\u003etuple.src.l3num \|\|\n-\t\t tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\tif ((tuple.src.l3num != cur-\u003enfproto \|\|\n+\t\t tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tif (info-\u003enlh-\u003enlmsg_flags \u0026 NLM_F_EXCL)\n@@ -479,10 +480,10 @@ nfnl_cthelper_dump_tuple(struct sk_buff skb,\n \t\tgoto nla_put_failure;\n \n \tif (nla_put_be16(skb, NFCTH_TUPLE_L3PROTONUM,\n-\t\t\t htons(helper-\u003etuple.src.l3num)))\n+\t\t\t htons(helper-\u003enfproto)))\n \t\tgoto nla_put_failure;\n \n-\tif (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper-\u003etuple.dst.protonum))\n+\tif (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper-\u003el4proto))\n \t\tgoto nla_put_failure;\n \n \tnla_nest_end(skb, nest_parms);\n@@ -661,8 +662,8 @@ static int nfnl_cthelper_get(struct sk_buff skb, const struct nfnl_info info,\n \t\t\tcontinue;\n \n \t\tif (tuple_set \u0026\u0026\n-\t\t (tuple.src.l3num != cur-\u003etuple.src.l3num \|\|\n-\t\t tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\t (tuple.src.l3num != cur-\u003enfproto \|\|\n+\t\t tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tskb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);\n@@ -721,8 +722,8 @@ static int nfnl_cthelper_del(struct sk_buff skb, const struct nfnl_info *info,\n \t\t\tcontinue;\n \n \t\tif (tuple_set \u0026\u0026\n-\t\t (tuple.src.l3num != cur-\u003etuple.src.l3num \|\|\n-\t\t tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\t (tuple.src.l3num != cur-\u003enfproto \|\|\n+\t\t tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tfound = true;\n" }
2/1	2026/06/26 18:09	agent	patch-evaluator	2m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": [ "NF_CONNTRACK", "NF_CT_NETLINK", "NETFILTER_NETLINK_QUEUE", "NETFILTER_NETLINK_GLUE_CT", "NETFILTER_ADVANCED", "NF_CT_NETLINK_HELPER", "NF_CONNTRACK_AMANDA", "NF_CONNTRACK_FTP", "NF_CONNTRACK_H323", "NF_CONNTRACK_IRC", "NF_CONNTRACK_NETBIOS_NS", "NF_CONNTRACK_PPTP", "NF_CONNTRACK_SANE", "NF_CONNTRACK_SIP", "NF_CONNTRACK_TFTP", "NF_CONNTRACK_SNMP", "NF_NAT", "NF_NAT_SNMP_BASIC", "OPENVSWITCH", "NET_ACT_CT" ], "FocusSymbols": [ "__nf_conntrack_helper_register", "__nf_conntrack_helper_find", "nf_ct_helper_init", "nfnl_cthelper_new", "nfnl_cthelper_get", "nfnl_cthelper_del", "nfnl_cthelper_create", "nf_ct_helper", "nf_conntrack_broadcast_help" ], "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.", "WorthFuzzing": true } Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Do not list too generic configs (we already have them enabled). Only list those that specifically cover the modified code. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes: commit 99dcd6c31c7d32b78fd940a0ab0080117e42408b Author: syz-cluster <triage@syzkaller.com> Date: Fri Jun 26 18:09:29 2026 +0000 syz-cluster: applied patch under review diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h index 81286c49932521..b15f37604cde4e 100644 --- a/include/linux/netfilter/nf_conntrack_h323.h +++ b/include/linux/netfilter/nf_conntrack_h323.h @@ -9,8 +9,6 @@ #include <net/netfilter/nf_conntrack_expect.h> #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h> -#define RAS_PORT 1719 -#define Q931_PORT 1720 #define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other / / This structure exists only once per master / diff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h index c3bdb43709384d..c0b305ce7c3c6b 100644 --- a/include/linux/netfilter/nf_conntrack_pptp.h +++ b/include/linux/netfilter/nf_conntrack_pptp.h @@ -50,8 +50,6 @@ struct nf_nat_pptp { __be16 pac_call_id; / NAT'ed PAC call id / }; -#define PPTP_CONTROL_PORT 1723 - #define PPTP_PACKET_CONTROL 1 #define PPTP_PACKET_MGMT 2 diff --git a/include/linux/netfilter/nf_conntrack_sane.h b/include/linux/netfilter/nf_conntrack_sane.h index 46c7acd1b4a70f..8501035d733559 100644 --- a/include/linux/netfilter/nf_conntrack_sane.h +++ b/include/linux/netfilter/nf_conntrack_sane.h @@ -3,8 +3,6 @@ #define _NF_CONNTRACK_SANE_H / SANE tracking. / -#define SANE_PORT 6566 - enum sane_state { SANE_STATE_NORMAL, SANE_STATE_START_REQUESTED, diff --git a/include/linux/netfilter/nf_conntrack_tftp.h b/include/linux/netfilter/nf_conntrack_tftp.h index 90b334bbce3ce6..e3d1739c557d15 100644 --- a/include/linux/netfilter/nf_conntrack_tftp.h +++ b/include/linux/netfilter/nf_conntrack_tftp.h @@ -2,8 +2,6 @@ #ifndef _NF_CONNTRACK_TFTP_H #define _NF_CONNTRACK_TFTP_H -#define TFTP_PORT 69 - #include <linux/netfilter.h> #include <linux/skbuff.h> #include <linux/types.h> diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index c761cd8158b253..bc5427d239f4c0 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -43,11 +43,10 @@ struct nf_conntrack_helper { refcount_t ct_refcnt; - / Tuple of things we will help (compared against server response) / - struct nf_conntrack_tuple tuple; + u8 nfproto; / NFPROTO_, can be NFPROTO_UNSPEC / + u8 l4proto; /* IPPROTO_UDP/TCP / - / Function to call when data passes; return verdict, or -1 to - invalidate. / + / Function to call when data passes; return verdict / int __rcu (help)(struct sk_buff skb, unsigned int protoff, struct nf_conn ct, enum ip_conntrack_info conntrackinfo); @@ -94,8 +93,7 @@ struct nf_conntrack_helper nf_conntrack_helper_try_module_get(const char name, void nf_conntrack_helper_put(struct nf_conntrack_helper helper); void nf_ct_helper_init(struct nf_conntrack_helper helper, - u16 l3num, u16 protonum, const char name, - u16 default_port, u16 spec_port, u32 id, + u8 l3num, u16 protonum, const char name, const struct nf_conntrack_expect_policy exp_pol, u32 expect_class_max, int (help)(struct sk_buff skb, unsigned int protoff, diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c index 0ede138dfd29e7..e540b86bd15b6b 100644 --- a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c +++ b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c @@ -213,7 +213,7 @@ static int __init nf_nat_snmp_basic_init(void) RCU_INIT_POINTER(nf_nat_snmp_hook, help); nf_ct_helper_init(&snmp_trap_helper, AF_INET, IPPROTO_UDP, - "snmp_trap", SNMP_TRAP_PORT, SNMP_TRAP_PORT, SNMP_TRAP_PORT, + "snmp_trap", &snmp_exp_policy, 0, help, NULL, THIS_MODULE); err = nf_conntrack_helper_register(&snmp_trap_helper, &snmp_trap_helper_ptr); diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c index ddafbdfc96dc35..edced039970d48 100644 --- a/net/netfilter/nf_conntrack_amanda.c +++ b/net/netfilter/nf_conntrack_amanda.c @@ -199,10 +199,10 @@ static int __init nf_conntrack_amanda_init(void) } nf_ct_helper_init(&amanda_helper[0], AF_INET, IPPROTO_UDP, - HELPER_NAME, 10080, 10080, 10080, + HELPER_NAME, &amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE); nf_ct_helper_init(&amanda_helper[1], AF_INET6, IPPROTO_UDP, - HELPER_NAME, 10080, 10080, 10080, + HELPER_NAME, &amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE); ret = nf_conntrack_helpers_register(amanda_helper, diff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c index bf78828c7549d4..6ff954f1bfb87c 100644 --- a/net/netfilter/nf_conntrack_broadcast.c +++ b/net/netfilter/nf_conntrack_broadcast.c @@ -66,8 +66,6 @@ int nf_conntrack_broadcast_help(struct sk_buff skb, exp->tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple; helper = rcu_dereference(help->helper); - if (helper) - exp->tuple.src.u.udp.port = helper->tuple.src.u.udp.port; exp->mask.src.u3.ip = mask; exp->mask.src.u.udp.port = htons(0xFFFF); diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c index 0847f845613d6a..f3944598c1726f 100644 --- a/net/netfilter/nf_conntrack_ftp.c +++ b/net/netfilter/nf_conntrack_ftp.c @@ -35,11 +35,6 @@ MODULE_ALIAS("ip_conntrack_ftp"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); static DEFINE_SPINLOCK(nf_ftp_lock); -#define MAX_PORTS 8 -static u_int16_t ports[MAX_PORTS]; -static unsigned int ports_c; -module_param_array(ports, ushort, &ports_c, 0400); - static bool loose; module_param(loose, bool, 0600); @@ -560,8 +555,8 @@ static int nf_ct_ftp_from_nlattr(struct nlattr attr, struct nf_conn ct) return 0; } -static struct nf_conntrack_helper ftp[MAX_PORTS * 2] __read_mostly; -static struct nf_conntrack_helper ftp_ptr[MAX_PORTS 2] __read_mostly; +static struct nf_conntrack_helper ftp __read_mostly; +static struct nf_conntrack_helper ftp_ptr __read_mostly; static const struct nf_conntrack_expect_policy ftp_exp_policy = { .max_expected = 1, @@ -570,32 +565,23 @@ static const struct nf_conntrack_expect_policy ftp_exp_policy = { static void __exit nf_conntrack_ftp_fini(void) { - nf_conntrack_helpers_unregister(ftp_ptr, ports_c 2); + nf_conntrack_helper_unregister(ftp_ptr); } static int __init nf_conntrack_ftp_init(void) { - int i, ret = 0; + int ret = 0; NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_ftp_master)); - if (ports_c == 0) - ports[ports_c++] = FTP_PORT; - /* FIXME should be configurable whether IPv4 and IPv6 FTP connections are tracked or not - YK / - for (i = 0; i < ports_c; i++) { - nf_ct_helper_init(&ftp[2 i], AF_INET, IPPROTO_TCP, - HELPER_NAME, FTP_PORT, ports[i], ports[i], - &ftp_exp_policy, 0, help, - nf_ct_ftp_from_nlattr, THIS_MODULE); - nf_ct_helper_init(&ftp[2 * i + 1], AF_INET6, IPPROTO_TCP, - HELPER_NAME, FTP_PORT, ports[i], ports[i], - &ftp_exp_policy, 0, help, - nf_ct_ftp_from_nlattr, THIS_MODULE); - } + nf_ct_helper_init(&ftp, NFPROTO_UNSPEC, IPPROTO_TCP, + HELPER_NAME, + &ftp_exp_policy, 0, help, + nf_ct_ftp_from_nlattr, THIS_MODULE); - ret = nf_conntrack_helpers_register(ftp, ports_c * 2, ftp_ptr); + ret = nf_conntrack_helper_register(&ftp, &ftp_ptr); if (ret < 0) { pr_err("failed to register helpers\n"); return ret; diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c index 24931e379985bb..98b9753d5e65e1 100644 --- a/net/netfilter/nf_conntrack_h323_main.c +++ b/net/netfilter/nf_conntrack_h323_main.c @@ -1713,19 +1713,19 @@ static int __init h323_helper_init(void) int ret; nf_ct_helper_init(&nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP, - "RAS", RAS_PORT, RAS_PORT, RAS_PORT, + "RAS", &ras_exp_policy, 0, ras_help, NULL, THIS_MODULE); nf_ct_helper_init(&nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP, - "RAS", RAS_PORT, RAS_PORT, RAS_PORT, + "RAS", &ras_exp_policy, 0, ras_help, NULL, THIS_MODULE); nf_ct_helper_init(&nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP, - "H.245", 0, 0, 0, + "H.245", &h245_exp_policy, 0, h245_help, NULL, THIS_MODULE); nf_ct_helper_init(&nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP, - "Q.931", Q931_PORT, Q931_PORT, Q931_PORT, + "Q.931", &q931_exp_policy, 0, q931_help, NULL, THIS_MODULE); nf_ct_helper_init(&nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP, - "Q.931", Q931_PORT, Q931_PORT, Q931_PORT, + "Q.931", &q931_exp_policy, 0, q931_help, NULL, THIS_MODULE); ret = nf_conntrack_helper_register(&nf_conntrack_helper_h245, diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index 500509b17663ed..506c5803476155 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -40,12 +40,16 @@ static unsigned int nf_ct_helper_count __read_mostly; static DEFINE_MUTEX(nf_ct_nat_helpers_mutex); static struct list_head nf_ct_nat_helpers __read_mostly; -/* Stupid hash, but collision free for the default registrations of the - * helpers currently in the kernel. / -static unsigned int helper_hash(const struct nf_conntrack_tuple tuple) +static unsigned int helper_hash(const char name, u8 protonum) { - return (((tuple->src.l3num << 8) \| tuple->dst.protonum) ^ - (__force __u16)tuple->src.u.all) % nf_ct_helper_hsize; + static u32 seed; + u32 initval; + + get_random_once(&seed, sizeof(seed)); + + initval = seed ^ protonum; + + return jhash(name, strlen(name), initval) % nf_ct_helper_hsize; } struct nf_conntrack_helper @@ -54,18 +58,18 @@ __nf_conntrack_helper_find(const char name, u16 l3num, u8 protonum) struct nf_conntrack_helper h; unsigned int i; - for (i = 0; i < nf_ct_helper_hsize; i++) { - hlist_for_each_entry_rcu(h, &nf_ct_helper_hash[i], hnode) { - if (strcmp(h->name, name)) - continue; + if (!nf_ct_helper_hash) + return NULL; - if (h->tuple.src.l3num != NFPROTO_UNSPEC && - h->tuple.src.l3num != l3num) - continue; + i = helper_hash(name, protonum); - if (h->tuple.dst.protonum == protonum) - return h; - } + hlist_for_each_entry_rcu(h, &nf_ct_helper_hash[i], hnode) { + if (strcmp(h->name, name)) + continue; + if (h->nfproto != NFPROTO_UNSPEC && h->nfproto != l3num) + continue; + if (h->l4proto == protonum) + return h; } return NULL; } @@ -363,9 +367,8 @@ EXPORT_SYMBOL_GPL(nf_ct_helper_log); int __nf_conntrack_helper_register(struct nf_conntrack_helper me) { - struct nf_conntrack_tuple_mask mask = { .src.u.all = htons(0xFFFF) }; - unsigned int h = helper_hash(&me->tuple); struct nf_conntrack_helper cur; + unsigned int h; int ret = 0, i; BUG_ON(me->expect_class_max >= NF_CT_MAX_EXPECT_CLASSES); @@ -382,29 +385,18 @@ int __nf_conntrack_helper_register(struct nf_conntrack_helper me) return -EINVAL; } + h = helper_hash(me->name, me->l4proto); mutex_lock(&nf_ct_helper_mutex); - for (i = 0; i < nf_ct_helper_hsize; i++) { - hlist_for_each_entry(cur, &nf_ct_helper_hash[i], hnode) { - if (!strcmp(cur->name, me->name) && - (cur->tuple.src.l3num == NFPROTO_UNSPEC \|\| - cur->tuple.src.l3num == me->tuple.src.l3num) && - cur->tuple.dst.protonum == me->tuple.dst.protonum) { - ret = -EBUSY; - goto out; - } + hlist_for_each_entry(cur, &nf_ct_helper_hash[h], hnode) { + if (!strcmp(cur->name, me->name) && + (cur->nfproto == NFPROTO_UNSPEC \|\| + cur->nfproto == me->nfproto) && + cur->l4proto == me->l4proto) { + ret = -EBUSY; + goto out; } } - / avoid unpredictable behaviour for auto_assign_helper / - if (!(me->flags & NF_CT_HELPER_F_USERSPACE)) { - hlist_for_each_entry(cur, &nf_ct_helper_hash[h], hnode) { - if (nf_ct_tuple_src_mask_cmp(&cur->tuple, &me->tuple, - &mask)) { - ret = -EBUSY; - goto out; - } - } - } refcount_set(&me->ct_refcnt, 1); hlist_add_head_rcu(&me->hnode, &nf_ct_helper_hash[h]); nf_ct_helper_count++; @@ -479,8 +471,7 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper me) EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister); void nf_ct_helper_init(struct nf_conntrack_helper helper, - u16 l3num, u16 protonum, const char name, - u16 default_port, u16 spec_port, u32 id, + u8 l3num, u16 protonum, const char name, const struct nf_conntrack_expect_policy exp_pol, u32 expect_class_max, int (help)(struct sk_buff skb, unsigned int protoff, @@ -492,9 +483,8 @@ void nf_ct_helper_init(struct nf_conntrack_helper helper, { memset(helper, 0, sizeof(helper)); - helper->tuple.src.l3num = l3num; - helper->tuple.dst.protonum = protonum; - helper->tuple.src.u.all = htons(spec_port); + helper->nfproto = l3num; + helper->l4proto = protonum; rcu_assign_pointer(helper->help, help); helper->from_nlattr = from_nlattr; @@ -502,10 +492,7 @@ void nf_ct_helper_init(struct nf_conntrack_helper helper, snprintf(helper->nat_mod_name, sizeof(helper->nat_mod_name), NF_NAT_HELPER_PREFIX "%s", name); - if (spec_port == default_port) - snprintf(helper->name, sizeof(helper->name), "%s", name); - else - snprintf(helper->name, sizeof(helper->name), "%s-%u", name, id); + snprintf(helper->name, sizeof(helper->name), "%s", name); if (WARN_ON_ONCE(expect_class_max >= NF_CT_MAX_EXPECT_CLASSES)) return; diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c index 193ab34db795f9..4e6bafe4143752 100644 --- a/net/netfilter/nf_conntrack_irc.c +++ b/net/netfilter/nf_conntrack_irc.c @@ -21,9 +21,6 @@ #include <net/netfilter/nf_conntrack_helper.h> #include <linux/netfilter/nf_conntrack_irc.h> -#define MAX_PORTS 8 -static unsigned short ports[MAX_PORTS]; -static unsigned int ports_c; static unsigned int max_dcc_channels = 8; static unsigned int dcc_timeout __read_mostly = 300; / This is slow, but it's simple. --RR / @@ -42,8 +39,6 @@ MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_irc"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); -module_param_array(ports, ushort, &ports_c, 0400); -MODULE_PARM_DESC(ports, "port numbers of IRC servers"); module_param(max_dcc_channels, uint, 0400); MODULE_PARM_DESC(max_dcc_channels, "max number of expected DCC channels per " "IRC session"); @@ -254,13 +249,13 @@ static int help(struct sk_buff skb, unsigned int protoff, return ret; } -static struct nf_conntrack_helper irc[MAX_PORTS] __read_mostly; -static struct nf_conntrack_helper irc_ptr[MAX_PORTS] __read_mostly; +static struct nf_conntrack_helper irc __read_mostly; +static struct nf_conntrack_helper irc_ptr __read_mostly; static struct nf_conntrack_expect_policy irc_exp_policy; static int __init nf_conntrack_irc_init(void) { - int i, ret; + int ret; nf_conntrack_helper_deprecated(HELPER_NAME); @@ -282,17 +277,11 @@ static int __init nf_conntrack_irc_init(void) if (!irc_buffer) return -ENOMEM; - /* If no port given, default to standard irc port / - if (ports_c == 0) - ports[ports_c++] = IRC_PORT; + nf_ct_helper_init(&irc, AF_INET, IPPROTO_TCP, HELPER_NAME, + &irc_exp_policy, + 0, help, NULL, THIS_MODULE); - for (i = 0; i < ports_c; i++) { - nf_ct_helper_init(&irc[i], AF_INET, IPPROTO_TCP, HELPER_NAME, - IRC_PORT, ports[i], i, &irc_exp_policy, - 0, help, NULL, THIS_MODULE); - } - - ret = nf_conntrack_helpers_register(&irc[0], ports_c, irc_ptr); + ret = nf_conntrack_helper_register(&irc, &irc_ptr); if (ret) { pr_err("failed to register helpers\n"); kfree(irc_buffer); @@ -304,7 +293,7 @@ static int __init nf_conntrack_irc_init(void) static void __exit nf_conntrack_irc_fini(void) { - nf_conntrack_helpers_unregister(irc_ptr, ports_c); + nf_conntrack_helper_unregister(irc_ptr); kfree(irc_buffer); } diff --git a/net/netfilter/nf_conntrack_netbios_ns.c b/net/netfilter/nf_conntrack_netbios_ns.c index 89d1cf7d6512e7..caa2b101fa9e5e 100644 --- a/net/netfilter/nf_conntrack_netbios_ns.c +++ b/net/netfilter/nf_conntrack_netbios_ns.c @@ -21,7 +21,6 @@ #include <net/netfilter/nf_conntrack_expect.h> #define HELPER_NAME "netbios-ns" -#define NMBD_PORT 137 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); MODULE_DESCRIPTION("NetBIOS name service broadcast connection tracking helper"); @@ -54,7 +53,6 @@ static int __init nf_conntrack_netbios_ns_init(void) exp_policy.timeout = timeout; nf_ct_helper_init(&helper, AF_INET, IPPROTO_UDP, HELPER_NAME, - NMBD_PORT, NMBD_PORT, NMBD_PORT, &exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE); return nf_conntrack_helper_register(&helper, &helper_ptr); diff --git a/net/netfilter/nf_conntrack_ovs.c b/net/netfilter/nf_conntrack_ovs.c index 49d1511e992185..b4085af3ad1ce0 100644 --- a/net/netfilter/nf_conntrack_ovs.c +++ b/net/netfilter/nf_conntrack_ovs.c @@ -31,8 +31,8 @@ int nf_ct_helper(struct sk_buff skb, struct nf_conn ct, if (!helper) return NF_ACCEPT; - if (helper->tuple.src.l3num != NFPROTO_UNSPEC && - helper->tuple.src.l3num != proto) + if (helper->nfproto != NFPROTO_UNSPEC && + helper->nfproto != proto) return NF_ACCEPT; switch (proto) { @@ -60,7 +60,7 @@ int nf_ct_helper(struct sk_buff skb, struct nf_conn ct, return NF_DROP; } - if (helper->tuple.dst.protonum != proto) + if (helper->l4proto != proto) return NF_ACCEPT; helper_cb = rcu_dereference(helper->help); diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c index 80fc14c87ddc4b..cbf32a3cb1f612 100644 --- a/net/netfilter/nf_conntrack_pptp.c +++ b/net/netfilter/nf_conntrack_pptp.c @@ -540,7 +540,7 @@ static int __init nf_conntrack_pptp_init(void) NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_pptp_master)); nf_ct_helper_init(&pptp, AF_INET, IPPROTO_TCP, - "pptp", PPTP_CONTROL_PORT, PPTP_CONTROL_PORT, PPTP_CONTROL_PORT, + "pptp", &pptp_exp_policy, 0, conntrack_pptp_help, NULL, THIS_MODULE); pptp.destroy = gre_pptp_destroy_siblings; diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c index 39085acf7a7185..a0658f69d78fbb 100644 --- a/net/netfilter/nf_conntrack_sane.c +++ b/net/netfilter/nf_conntrack_sane.c @@ -34,11 +34,6 @@ MODULE_AUTHOR("Michal Schmidt <mschmidt@redhat.com>"); MODULE_DESCRIPTION("SANE connection tracking helper"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); -#define MAX_PORTS 8 -static u_int16_t ports[MAX_PORTS]; -static unsigned int ports_c; -module_param_array(ports, ushort, &ports_c, 0400); - struct sane_request { __be32 RPC_code; #define SANE_NET_START 7 / RPC code / @@ -169,8 +164,8 @@ static int help(struct sk_buff skb, return ret; } -static struct nf_conntrack_helper sane[MAX_PORTS * 2] __read_mostly; -static struct nf_conntrack_helper sane_ptr[MAX_PORTS 2] __read_mostly; +static struct nf_conntrack_helper sane __read_mostly; +static struct nf_conntrack_helper sane_ptr __read_mostly; static const struct nf_conntrack_expect_policy sane_exp_policy = { .max_expected = 1, @@ -179,32 +174,21 @@ static const struct nf_conntrack_expect_policy sane_exp_policy = { static void __exit nf_conntrack_sane_fini(void) { - nf_conntrack_helpers_unregister(sane_ptr, ports_c 2); + nf_conntrack_helper_unregister(sane_ptr); } static int __init nf_conntrack_sane_init(void) { - int i, ret = 0; + int ret = 0; NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sane_master)); - if (ports_c == 0) - ports[ports_c++] = SANE_PORT; - - /* FIXME should be configurable whether IPv4 and IPv6 connections - are tracked or not - YK / - for (i = 0; i < ports_c; i++) { - nf_ct_helper_init(&sane[2 i], AF_INET, IPPROTO_TCP, - HELPER_NAME, SANE_PORT, ports[i], ports[i], - &sane_exp_policy, 0, help, NULL, - THIS_MODULE); - nf_ct_helper_init(&sane[2 * i + 1], AF_INET6, IPPROTO_TCP, - HELPER_NAME, SANE_PORT, ports[i], ports[i], - &sane_exp_policy, 0, help, NULL, - THIS_MODULE); - } + nf_ct_helper_init(&sane, NFPROTO_UNSPEC, IPPROTO_TCP, + HELPER_NAME, + &sane_exp_policy, 0, help, NULL, + THIS_MODULE); - ret = nf_conntrack_helpers_register(sane, ports_c * 2, sane_ptr); + ret = nf_conntrack_helper_register(&sane, &sane_ptr); if (ret < 0) { pr_err("failed to register helpers\n"); return ret; diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index 5ec3a4a4bbd707..d0b85b8ad1e6d8 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -35,12 +35,6 @@ MODULE_DESCRIPTION("SIP connection tracking helper"); MODULE_ALIAS("ip_conntrack_sip"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); -#define MAX_PORTS 8 -static unsigned short ports[MAX_PORTS]; -static unsigned int ports_c; -module_param_array(ports, ushort, &ports_c, 0400); -MODULE_PARM_DESC(ports, "port numbers of SIP servers"); - static unsigned int sip_timeout __read_mostly = SIP_TIMEOUT; module_param(sip_timeout, uint, 0600); MODULE_PARM_DESC(sip_timeout, "timeout for the master SIP session"); @@ -1764,8 +1758,8 @@ static int sip_help_udp(struct sk_buff skb, unsigned int protoff, return process_sip_msg(skb, ct, protoff, dataoff, &dptr, &datalen); } -static struct nf_conntrack_helper sip[MAX_PORTS 4] __read_mostly; -static struct nf_conntrack_helper sip_ptr[MAX_PORTS 4] __read_mostly; +static struct nf_conntrack_helper sip[2] __read_mostly; +static struct nf_conntrack_helper sip_ptr[2] __read_mostly; static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1] = { [SIP_EXPECT_SIGNALLING] = { @@ -1792,38 +1786,25 @@ static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1 static void __exit nf_conntrack_sip_fini(void) { - nf_conntrack_helpers_unregister(sip_ptr, ports_c 4); + nf_conntrack_helpers_unregister(sip_ptr, 2); } static int __init nf_conntrack_sip_init(void) { - int i, ret; + int ret; NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sip_master)); - if (ports_c == 0) - ports[ports_c++] = SIP_PORT; - - for (i = 0; i < ports_c; i++) { - nf_ct_helper_init(&sip[4 * i], AF_INET, IPPROTO_UDP, - HELPER_NAME, SIP_PORT, ports[i], i, - sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp, - NULL, THIS_MODULE); - nf_ct_helper_init(&sip[4 * i + 1], AF_INET, IPPROTO_TCP, - HELPER_NAME, SIP_PORT, ports[i], i, - sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp, - NULL, THIS_MODULE); - nf_ct_helper_init(&sip[4 * i + 2], AF_INET6, IPPROTO_UDP, - HELPER_NAME, SIP_PORT, ports[i], i, - sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp, - NULL, THIS_MODULE); - nf_ct_helper_init(&sip[4 * i + 3], AF_INET6, IPPROTO_TCP, - HELPER_NAME, SIP_PORT, ports[i], i, - sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp, - NULL, THIS_MODULE); - } + nf_ct_helper_init(&sip[0], NFPROTO_UNSPEC, IPPROTO_UDP, + HELPER_NAME, + sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp, + NULL, THIS_MODULE); + nf_ct_helper_init(&sip[1], NFPROTO_UNSPEC, IPPROTO_TCP, + HELPER_NAME, + sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp, + NULL, THIS_MODULE); - ret = nf_conntrack_helpers_register(sip, ports_c * 4, sip_ptr); + ret = nf_conntrack_helpers_register(sip, 2, sip_ptr); if (ret < 0) { pr_err("failed to register helpers\n"); return ret; diff --git a/net/netfilter/nf_conntrack_snmp.c b/net/netfilter/nf_conntrack_snmp.c index b6fce5703fce77..109986d5d55e69 100644 --- a/net/netfilter/nf_conntrack_snmp.c +++ b/net/netfilter/nf_conntrack_snmp.c @@ -14,8 +14,6 @@ #include <net/netfilter/nf_conntrack_expect.h> #include <linux/netfilter/nf_conntrack_snmp.h> -#define SNMP_PORT 161 - MODULE_AUTHOR("Jiri Olsa <jolsa@redhat.com>"); MODULE_DESCRIPTION("SNMP service broadcast connection tracking helper"); MODULE_LICENSE("GPL"); @@ -55,7 +53,7 @@ static int __init nf_conntrack_snmp_init(void) exp_policy.timeout = timeout; nf_ct_helper_init(&helper, AF_INET, IPPROTO_UDP, - "snmp", SNMP_PORT, SNMP_PORT, SNMP_PORT, + "snmp", &exp_policy, 0, snmp_conntrack_help, NULL, THIS_MODULE); diff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c index 4393c435aa3549..a69559edf9b363 100644 --- a/net/netfilter/nf_conntrack_tftp.c +++ b/net/netfilter/nf_conntrack_tftp.c @@ -26,12 +26,6 @@ MODULE_LICENSE("GPL"); MODULE_ALIAS("ip_conntrack_tftp"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); -#define MAX_PORTS 8 -static unsigned short ports[MAX_PORTS]; -static unsigned int ports_c; -module_param_array(ports, ushort, &ports_c, 0400); -MODULE_PARM_DESC(ports, "Port numbers of TFTP servers"); - nf_nat_tftp_hook_fn __rcu nf_nat_tftp_hook __read_mostly; EXPORT_SYMBOL_GPL(nf_nat_tftp_hook); @@ -95,8 +89,8 @@ static int tftp_help(struct sk_buff skb, return ret; } -static struct nf_conntrack_helper tftp[MAX_PORTS * 2] __read_mostly; -static struct nf_conntrack_helper tftp_ptr[MAX_PORTS 2] __read_mostly; +static struct nf_conntrack_helper tftp __read_mostly; +static struct nf_conntrack_helper tftp_ptr __read_mostly; static const struct nf_conntrack_expect_policy tftp_exp_policy = { .max_expected = 1, @@ -105,30 +99,21 @@ static const struct nf_conntrack_expect_policy tftp_exp_policy = { static void __exit nf_conntrack_tftp_fini(void) { - nf_conntrack_helpers_unregister(tftp_ptr, ports_c 2); + nf_conntrack_helper_unregister(tftp_ptr); } static int __init nf_conntrack_tftp_init(void) { - int i, ret; + int ret; NF_CT_HELPER_BUILD_BUG_ON(0); - if (ports_c == 0) - ports[ports_c++] = TFTP_PORT; - - for (i = 0; i < ports_c; i++) { - nf_ct_helper_init(&tftp[2 * i], AF_INET, IPPROTO_UDP, - HELPER_NAME, TFTP_PORT, ports[i], i, - &tftp_exp_policy, 0, tftp_help, NULL, - THIS_MODULE); - nf_ct_helper_init(&tftp[2 * i + 1], AF_INET6, IPPROTO_UDP, - HELPER_NAME, TFTP_PORT, ports[i], i, - &tftp_exp_policy, 0, tftp_help, NULL, - THIS_MODULE); - } + nf_ct_helper_init(&tftp, NFPROTO_UNSPEC, IPPROTO_UDP, + HELPER_NAME, + &tftp_exp_policy, 0, tftp_help, NULL, + THIS_MODULE); - ret = nf_conntrack_helpers_register(tftp, ports_c * 2, tftp_ptr); + ret = nf_conntrack_helper_register(&tftp, &tftp_ptr); if (ret < 0) { pr_err("failed to register helpers\n"); return ret; diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c index f1460b683d7af7..56655cb7fe2ad0 100644 --- a/net/netfilter/nfnetlink_cthelper.c +++ b/net/netfilter/nfnetlink_cthelper.c @@ -67,7 +67,7 @@ nfnl_userspace_cthelper(struct sk_buff skb, unsigned int protoff, } static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = { - [NFCTH_TUPLE_L3PROTONUM] = { .type = NLA_U16, }, + [NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6), [NFCTH_TUPLE_L4PROTONUM] = { .type = NLA_U8, }, }; @@ -254,7 +254,8 @@ nfnl_cthelper_create(const struct nlattr const tb[], helper->data_len = size; helper->flags \|= NF_CT_HELPER_F_USERSPACE; - memcpy(&helper->tuple, tuple, sizeof(struct nf_conntrack_tuple)); + helper->nfproto = tuple->src.l3num; + helper->l4proto = tuple->dst.protonum; helper->me = THIS_MODULE; helper->help = nfnl_userspace_cthelper; @@ -449,8 +450,8 @@ static int nfnl_cthelper_new(struct sk_buff skb, const struct nfnl_info info, if (strncmp(cur->name, helper_name, NF_CT_HELPER_NAME_LEN)) continue; - if ((tuple.src.l3num != cur->tuple.src.l3num \|\| - tuple.dst.protonum != cur->tuple.dst.protonum)) + if ((tuple.src.l3num != cur->nfproto \|\| + tuple.dst.protonum != cur->l4proto)) continue; if (info->nlh->nlmsg_flags & NLM_F_EXCL) @@ -479,10 +480,10 @@ nfnl_cthelper_dump_tuple(struct sk_buff skb, goto nla_put_failure; if (nla_put_be16(skb, NFCTH_TUPLE_L3PROTONUM, - htons(helper->tuple.src.l3num))) + htons(helper->nfproto))) goto nla_put_failure; - if (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper->tuple.dst.protonum)) + if (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper->l4proto)) goto nla_put_failure; nla_nest_end(skb, nest_parms); @@ -661,8 +662,8 @@ static int nfnl_cthelper_get(struct sk_buff skb, const struct nfnl_info info, continue; if (tuple_set && - (tuple.src.l3num != cur->tuple.src.l3num \|\| - tuple.dst.protonum != cur->tuple.dst.protonum)) + (tuple.src.l3num != cur->nfproto \|\| + tuple.dst.protonum != cur->l4proto)) continue; skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); @@ -721,8 +722,8 @@ static int nfnl_cthelper_del(struct sk_buff skb, const struct nfnl_info *info, continue; if (tuple_set && - (tuple.src.l3num != cur->tuple.src.l3num \|\| - tuple.dst.protonum != cur->tuple.dst.protonum)) + (tuple.src.l3num != cur->nfproto \|\| + tuple.dst.protonum != cur->l4proto)) continue; found = true;
3/2	2026/06/26 18:09	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 14331 output: 32 thoughts: 983 Thoughts: Analyzing a Netfilter Conntrack Helper Patch Okay, so I've got this patch that's messing with netfilter conntrack helpers, specifically how they're defined and registered. My immediate thought is, this is a significant functional change. The core of it seems to revolve around eliminating the `tuple` field in `struct nf_conntrack_helper` and replacing it with individual protocol identifiers (`nfproto` and `l4proto`). They've also changed `nf_ct_helper_init` to take an `u8 l3num` instead of `u16 l3num`, and removed some of the now obsolete initialisers. It feels like they're streamlining the helper structure. My initial interpretation is that this is likely a refactor to align with a more rule-based helper assignment, like what you'd see with nftables or the conntrack target in iptables. The removal of port-based matching further reinforces this; it strongly suggests the system is no longer relying on automatic helper selection by port, which I seem to recall was deprecated and disabled by default anyway. The removal of the tuples and port arrays from the helpers themselves clinches that point. Given the scope of the change, which touches a fair number of helper modules, I'm thinking a thorough review is in order. The files modified include both header files and the core helper logic, plus specific helper implementations like FTP, IRC, SIP, and TFTP. I'll need to go through the changes to ensure everything is handled correctly. To make sure I'm testing everything, I'll need to enable these configurations: `CONFIG_NF_CONNTRACK` and all of the individual helper options, as well as `CONFIG_NF_CT_NETLINK_HELPER`. I'll focus on these symbols: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nf_ct_helper_init`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_dump_tuple`, and `nfnl_userspace_cthelper`. I'll start there. Now let's dive into the code...
4/2	2026/06/26 18:09	tool	grepper	0m Args: { "Expression": "nf_ct_helper_init", "PathPrefix": "net/netfilter/" } Results: { "Output": "net/netfilter/nf_conntrack_amanda.c=185=static int __init nf_conntrack_amanda_init(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-200-\nnet/netfilter/nf_conntrack_amanda.c:201:\tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-202-\t\t\t HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c-203-\t\t\t \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c:204:\tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-205-\t\t\t HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_ftp.c=571=static int __init nf_conntrack_ftp_init(void)\n--\nnet/netfilter/nf_conntrack_ftp.c-578-\t\t are tracked or not - YK /\nnet/netfilter/nf_conntrack_ftp.c:579:\tnf_ct_helper_init(\u0026ftp, NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_ftp.c-580-\t\t\t HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_h323_main.c=1711=static int __init h323_helper_init(void)\n--\nnet/netfilter/nf_conntrack_h323_main.c-1714-\nnet/netfilter/nf_conntrack_h323_main.c:1715:\tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1716-\t\t\t \"RAS\",\nnet/netfilter/nf_conntrack_h323_main.c-1717-\t\t\t \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1718:\tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1719-\t\t\t \"RAS\",\nnet/netfilter/nf_conntrack_h323_main.c-1720-\t\t\t \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1721:\tnf_ct_helper_init(\u0026nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1722-\t\t\t \"H.245\",\nnet/netfilter/nf_conntrack_h323_main.c-1723-\t\t\t \u0026h245_exp_policy, 0, h245_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1724:\tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_h323_main.c-1725-\t\t\t \"Q.931\",\nnet/netfilter/nf_conntrack_h323_main.c-1726-\t\t\t \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1727:\tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_h323_main.c-1728-\t\t\t \"Q.931\",\n--\nnet/netfilter/nf_conntrack_helper.c=471=EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);\nnet/netfilter/nf_conntrack_helper.c-472-\nnet/netfilter/nf_conntrack_helper.c:473:void nf_ct_helper_init(struct nf_conntrack_helper helper,\nnet/netfilter/nf_conntrack_helper.c-474-\t\t u8 l3num, u16 protonum, const char *name,\n--\nnet/netfilter/nf_conntrack_helper.c-503-}\nnet/netfilter/nf_conntrack_helper.c:504:EXPORT_SYMBOL_GPL(nf_ct_helper_init);\nnet/netfilter/nf_conntrack_helper.c-505-\n--\nnet/netfilter/nf_conntrack_irc.c=256=static int __init nf_conntrack_irc_init(void)\n--\nnet/netfilter/nf_conntrack_irc.c-279-\nnet/netfilter/nf_conntrack_irc.c:280:\tnf_ct_helper_init(\u0026irc, AF_INET, IPPROTO_TCP, HELPER_NAME,\nnet/netfilter/nf_conntrack_irc.c-281-\t\t\t \u0026irc_exp_policy,\n--\nnet/netfilter/nf_conntrack_netbios_ns.c=49=static int __init nf_conntrack_netbios_ns_init(void)\n--\nnet/netfilter/nf_conntrack_netbios_ns.c-54-\nnet/netfilter/nf_conntrack_netbios_ns.c:55:\tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP, HELPER_NAME,\nnet/netfilter/nf_conntrack_netbios_ns.c-56-\t\t\t \u0026exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE);\n--\nnet/netfilter/nf_conntrack_pptp.c=538=static int __init nf_conntrack_pptp_init(void)\n--\nnet/netfilter/nf_conntrack_pptp.c-541-\nnet/netfilter/nf_conntrack_pptp.c:542:\tnf_ct_helper_init(\u0026pptp, AF_INET, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_pptp.c-543-\t\t\t \"pptp\",\n--\nnet/netfilter/nf_conntrack_sane.c=180=static int __init nf_conntrack_sane_init(void)\n--\nnet/netfilter/nf_conntrack_sane.c-185-\nnet/netfilter/nf_conntrack_sane.c:186:\tnf_ct_helper_init(\u0026sane, NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_sane.c-187-\t\t\t HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_sip.c=1792=static int __init nf_conntrack_sip_init(void)\n--\nnet/netfilter/nf_conntrack_sip.c-1797-\nnet/netfilter/nf_conntrack_sip.c:1798:\tnf_ct_helper_init(\u0026sip[0], NFPROTO_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_sip.c-1799-\t\t\t HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_sip.c-1801-\t\t\t NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_sip.c:1802:\tnf_ct_helper_init(\u0026sip[1], NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_sip.c-1803-\t\t\t HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_snmp.c=51=static int __init nf_conntrack_snmp_init(void)\n--\nnet/netfilter/nf_conntrack_snmp.c-54-\nnet/netfilter/nf_conntrack_snmp.c:55:\tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_snmp.c-56-\t\t\t \"snmp\",\n--\nnet/netfilter/nf_conntrack_tftp.c=105=static int __init nf_conntrack_tftp_init(void)\n--\nnet/netfilter/nf_conntrack_tftp.c-110-\nnet/netfilter/nf_conntrack_tftp.c:111:\tnf_ct_helper_init(\u0026tftp, NFPROTO_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_tftp.c-112-\t\t\t HELPER_NAME,\n" }
5/2	2026/06/26 18:09	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18256 output: 34 thoughts: 54 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: Diving into the Conntrack Helper Patch Right, so this patch is messing with the `nf_ct_helper_init` function and, more importantly, `__nf_conntrack_helper_register`. That immediately tells me we're looking at some low-level changes to the connection tracking helper registration process. Given the nature of this area, I'll need to understand exactly how it's been altered and what that signifies. My first step is to zoom in on those functions directly. It’s pretty clear that it’s altering what happens when we register those helpers, and looking at those specific functions will make it clear exactly how they're being changed. I will start by examining `__nf_conntrack_helper_register` and `nf_conntrack_helper_register`. The difference between the two might provide some useful detail, so it's best to have both in mind at the same time. Let's see what's changed and what's different.
6/2	2026/06/26 18:09	tool	grepper	0m Args: { "Expression": "nf_conntrack_helper_register", "PathPrefix": "net/netfilter/" } Results: { "Output": "net/netfilter/nf_conntrack_ftp.c=571=static int __init nf_conntrack_ftp_init(void)\n--\nnet/netfilter/nf_conntrack_ftp.c-583-\nnet/netfilter/nf_conntrack_ftp.c:584:\tret = nf_conntrack_helper_register(\u0026ftp, \u0026ftp_ptr);\nnet/netfilter/nf_conntrack_ftp.c-585-\tif (ret \u003c 0) {\n--\nnet/netfilter/nf_conntrack_h323_main.c=1711=static int __init h323_helper_init(void)\n--\nnet/netfilter/nf_conntrack_h323_main.c-1730-\nnet/netfilter/nf_conntrack_h323_main.c:1731:\tret = nf_conntrack_helper_register(\u0026nf_conntrack_helper_h245,\nnet/netfilter/nf_conntrack_h323_main.c-1732-\t\t\t\t\t \u0026nf_conntrack_helper_h245_ptr);\n--\nnet/netfilter/nf_conntrack_helper.c=366=EXPORT_SYMBOL_GPL(nf_ct_helper_log);\nnet/netfilter/nf_conntrack_helper.c-367-\nnet/netfilter/nf_conntrack_helper.c:368:int __nf_conntrack_helper_register(struct nf_conntrack_helper me)\nnet/netfilter/nf_conntrack_helper.c-369-{\n--\nnet/netfilter/nf_conntrack_helper.c-406-}\nnet/netfilter/nf_conntrack_helper.c:407:EXPORT_SYMBOL_GPL(__nf_conntrack_helper_register);\nnet/netfilter/nf_conntrack_helper.c-408-\nnet/netfilter/nf_conntrack_helper.c:409:int nf_conntrack_helper_register(struct nf_conntrack_helper me,\nnet/netfilter/nf_conntrack_helper.c-410-\t\t\t\t struct nf_conntrack_helper *helper_ptr)\n--\nnet/netfilter/nf_conntrack_helper.c-421-\nnet/netfilter/nf_conntrack_helper.c:422:\terr = __nf_conntrack_helper_register(new_helper);\nnet/netfilter/nf_conntrack_helper.c-423-\tif (err \u003c 0)\n--\nnet/netfilter/nf_conntrack_helper.c-433-}\nnet/netfilter/nf_conntrack_helper.c:434:EXPORT_SYMBOL_GPL(nf_conntrack_helper_register);\nnet/netfilter/nf_conntrack_helper.c-435-\n--\nnet/netfilter/nf_conntrack_helper.c=506=int nf_conntrack_helpers_register(struct nf_conntrack_helper helper,\n--\nnet/netfilter/nf_conntrack_helper.c-522-\nnet/netfilter/nf_conntrack_helper.c:523:\t\terr = __nf_conntrack_helper_register(new_helper);\nnet/netfilter/nf_conntrack_helper.c-524-\t\tif (err \u003c 0) {\n--\nnet/netfilter/nf_conntrack_irc.c=256=static int __init nf_conntrack_irc_init(void)\n--\nnet/netfilter/nf_conntrack_irc.c-283-\nnet/netfilter/nf_conntrack_irc.c:284:\tret = nf_conntrack_helper_register(\u0026irc, \u0026irc_ptr);\nnet/netfilter/nf_conntrack_irc.c-285-\tif (ret) {\n--\nnet/netfilter/nf_conntrack_netbios_ns.c=49=static int __init nf_conntrack_netbios_ns_init(void)\n--\nnet/netfilter/nf_conntrack_netbios_ns.c-57-\nnet/netfilter/nf_conntrack_netbios_ns.c:58:\treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\nnet/netfilter/nf_conntrack_netbios_ns.c-59-}\n--\nnet/netfilter/nf_conntrack_pptp.c=538=static int __init nf_conntrack_pptp_init(void)\n--\nnet/netfilter/nf_conntrack_pptp.c-549-\nnet/netfilter/nf_conntrack_pptp.c:550:\treturn nf_conntrack_helper_register(\u0026pptp, \u0026pptp_ptr);\nnet/netfilter/nf_conntrack_pptp.c-551-}\n--\nnet/netfilter/nf_conntrack_sane.c=180=static int __init nf_conntrack_sane_init(void)\n--\nnet/netfilter/nf_conntrack_sane.c-190-\nnet/netfilter/nf_conntrack_sane.c:191:\tret = nf_conntrack_helper_register(\u0026sane, \u0026sane_ptr);\nnet/netfilter/nf_conntrack_sane.c-192-\tif (ret \u003c 0) {\n--\nnet/netfilter/nf_conntrack_snmp.c=51=static int __init nf_conntrack_snmp_init(void)\n--\nnet/netfilter/nf_conntrack_snmp.c-59-\nnet/netfilter/nf_conntrack_snmp.c:60:\treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\nnet/netfilter/nf_conntrack_snmp.c-61-}\n--\nnet/netfilter/nf_conntrack_tftp.c=105=static int __init nf_conntrack_tftp_init(void)\n--\nnet/netfilter/nf_conntrack_tftp.c-115-\nnet/netfilter/nf_conntrack_tftp.c:116:\tret = nf_conntrack_helper_register(\u0026tftp, \u0026tftp_ptr);\nnet/netfilter/nf_conntrack_tftp.c-117-\tif (ret \u003c 0) {\n--\nnet/netfilter/nfnetlink_cthelper.c=220=nfnl_cthelper_create(const struct nlattr * const tb[],\n--\nnet/netfilter/nfnetlink_cthelper.c-281-\nnet/netfilter/nfnetlink_cthelper.c:282:\tret = __nf_conntrack_helper_register(helper);\nnet/netfilter/nfnetlink_cthelper.c-283-\tif (ret \u003c 0)\n" }
7/2	2026/06/26 18:09	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20356 output: 35 thoughts: 58 Thoughts: Okay, let's dive into these changes. Analyzing the Conntrack Helper Patch Right, so this patch is touching `nf_ct_helper_init`, `__nf_conntrack_helper_register`, and `__nf_conntrack_helper_find`. My initial thought is to zero in on that `__nf_conntrack_helper_find` function. Given the naming convention, it's likely responsible for looking up connection tracking helpers, so understanding any modifications there is key to grasping the core impact of this patch. Let's see what's actually been changed in that function; it will likely give the best overview of how conntrack helper behavior has been modified.
8/2	2026/06/26 18:09	tool	grepper	0m Args: { "Expression": "__nf_conntrack_helper_find", "PathPrefix": "net/netfilter/" } Results: { "Output": "net/netfilter/nf_conntrack_helper.c=55=struct nf_conntrack_helper \nnet/netfilter/nf_conntrack_helper.c:56:__nf_conntrack_helper_find(const char name, u16 l3num, u8 protonum)\nnet/netfilter/nf_conntrack_helper.c-57-{\n--\nnet/netfilter/nf_conntrack_helper.c-75-}\nnet/netfilter/nf_conntrack_helper.c:76:EXPORT_SYMBOL_GPL(__nf_conntrack_helper_find);\nnet/netfilter/nf_conntrack_helper.c-77-\n--\nnet/netfilter/nf_conntrack_helper.c=79=nf_conntrack_helper_try_module_get(const char name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-84-\nnet/netfilter/nf_conntrack_helper.c:85:\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-86-#ifdef CONFIG_MODULES\n--\nnet/netfilter/nf_conntrack_helper.c-90-\t\t\trcu_read_lock();\nnet/netfilter/nf_conntrack_helper.c:91:\t\t\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-92-\t\t} else {\n--\nnet/netfilter/nf_conntrack_helper.c=134=nf_nat_helper_try_module_get(const char name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-141-\trcu_read_lock();\nnet/netfilter/nf_conntrack_helper.c:142:\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-143-\tif (!h) {\n--\nnet/netfilter/nf_conntrack_netlink.c=1926=static int ctnetlink_change_helper(struct nf_conn ct,\n--\nnet/netfilter/nf_conntrack_netlink.c-1955-\nnet/netfilter/nf_conntrack_netlink.c:1956:\thelper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),\nnet/netfilter/nf_conntrack_netlink.c-1957-\t\t\t\t\t nf_ct_protonum(ct));\n--\nnet/netfilter/nf_conntrack_netlink.c=2222=ctnetlink_create_conntrack(struct net net,\n--\nnet/netfilter/nf_conntrack_netlink.c-2250-\nnet/netfilter/nf_conntrack_netlink.c:2251:\t\thelper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),\nnet/netfilter/nf_conntrack_netlink.c-2252-\t\t\t\t\t\t nf_ct_protonum(ct));\n--\nnet/netfilter/nf_conntrack_netlink.c-2261-\t\t\trcu_read_lock();\nnet/netfilter/nf_conntrack_netlink.c:2262:\t\t\thelper = __nf_conntrack_helper_find(helpname,\nnet/netfilter/nf_conntrack_netlink.c-2263-\t\t\t\t\t\t\t nf_ct_l3num(ct),\n--\nnet/netfilter/nf_conntrack_netlink.c=2856=ctnetlink_glue_attach_expect(const struct nlattr attr, struct nf_conn ct,\n--\nnet/netfilter/nf_conntrack_netlink.c-2880-\nnet/netfilter/nf_conntrack_netlink.c:2881:\t\tassign_helper = __nf_conntrack_helper_find(helpname,\nnet/netfilter/nf_conntrack_netlink.c-2882-\t\t\t\t\t\t\t nf_ct_l3num(ct),\n" }
9/2	2026/06/26 18:09	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21709 output: 33 thoughts: 285 Thoughts: My Analysis of the Conntrack Helper Implementation Alright, let's break this down. From what I'm seeing, these changes are definitely touching on the functional aspects and should be accessible via netlink, specifically with those `nfnetlink_cthelper` and `ctnetlink` interfaces. And of course, the loading of the conntrack helper modules will be key. My focus should be on those core functions: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, as well as the netlink interface operations: `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. These are the building blocks of this helper system. And then there's the configuration aspect. We need to be aware of the relevant config options: `NF_CONNTRACK`, naturally, and `NF_CT_NETLINK_HELPER` which I suspect is the config required for netlink, and then all those helper-specific options for protocols such as `NF_CONNTRACK_FTP`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP` `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_BROADCAST`. Wait a minute, based on the naming convention, `NF_CT_NETLINK_HELPER` is very likely the configuration option tied to `nfnetlink_cthelper.c`. I should probably double-check that config option to be certain.
10/2	2026/06/26 18:09	tool	grepper	0m Error: no matches Args: { "Expression": "nfnetlink_cthelper", "PathPrefix": "net/netfilter/Kconfig" } Results: { "error": "no matches" }
11/2	2026/06/26 18:09	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 22437 output: 32 thoughts: 12 Thoughts: Here's a summary of my thought process: Diving into the Netfilter Makefile Okay, time to get my hands dirty. My initial instinct, given the context, is to jump into the `net/netfilter/Makefile`. It's the central configuration and build file for the Netfilter subsystem, and the place where I expect to find the dependencies and build rules I need to examine. I'll start here, because understanding the build process is often key to understanding the underlying architecture and where to look for deeper code functionality. Let's see what secrets it holds.
12/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nfnetlink_cthelper", "PathPrefix": "net/netfilter/Makefile" } Results: { "Output": "net/netfilter/Makefile=38=obj-$(CONFIG_NF_CT_NETLINK_TIMEOUT) += nfnetlink_cttimeout.o\nnet/netfilter/Makefile:39:obj-$(CONFIG_NF_CT_NETLINK_HELPER) += nfnetlink_cthelper.o\nnet/netfilter/Makefile-40-\n" }
13/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 22695 output: 33 thoughts: 164 Thoughts: Examining Netfilter Configuration Options Okay, so I'm focusing on Netfilter configurations. Yes, `NF_CT_NETLINK_HELPER` immediately comes to mind. It's the starting point, of course. Now, I need to broaden the scope a bit, just to make sure I'm not missing anything crucial. Let me quickly scan for related configurations, particularly those concerning connection tracking, as these are often interconnected. Right, here we go: `NF_CONNTRACK_FTP`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, `NF_CONNTRACK_NETBIOS_NS`, and finally, `NF_CONNTRACK_BROADCAST`. Next, I need to confirm these settings, and their respective dependencies within the Netfilter framework, so the next step is to examine `net/netfilter/Makefile` and `net/ipv4/netfilter/Makefile`. This will provide a more comprehensive view of their interdependencies and how they are handled.
14/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nf_conntrack_ftp", "PathPrefix": "net/netfilter/Makefile" } Results: { "Output": "net/netfilter/Makefile=44=obj-$(CONFIG_NF_CONNTRACK_AMANDA) += nf_conntrack_amanda.o\nnet/netfilter/Makefile:45:obj-$(CONFIG_NF_CONNTRACK_FTP) += nf_conntrack_ftp.o\nnet/netfilter/Makefile-46-obj-$(CONFIG_NF_CONNTRACK_H323) += nf_conntrack_h323.o\n" }
15/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 23279 output: 35 thoughts: 182 Thoughts: Analyzing Connection Tracking Configurations Okay, let's get a handle on the `NF_CONNTRACK` configurations we're dealing with. I need a comprehensive overview, so let's start with a list: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, and finally, `NF_CONNTRACK_BROADCAST`. Right, got it. Hmm, wait a second. That `NF_CONNTRACK_BROADCAST` entry feels out of place in that list. My understanding is that it's often implicitly activated when either `NF_CONNTRACK_NETBIOS_NS` or `NF_CONNTRACK_SNMP` is enabled, and typically shouldn't be listed independently. I should verify that. I'm going to have to check if this is indeed the case.
16/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "NF_CONNTRACK_BROADCAST", "PathPrefix": "net/netfilter/Kconfig" } Results: { "Output": "net/netfilter/Kconfig=258=config NF_CONNTRACK_IRC\n--\nnet/netfilter/Kconfig-273-\nnet/netfilter/Kconfig:274:config NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-275-\ttristate\n--\nnet/netfilter/Kconfig=277=config NF_CONNTRACK_NETBIOS_NS\nnet/netfilter/Kconfig-278-\ttristate \"NetBIOS name service protocol support\"\nnet/netfilter/Kconfig:279:\tselect NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-280-\thelp\n--\nnet/netfilter/Kconfig=296=config NF_CONNTRACK_SNMP\n--\nnet/netfilter/Kconfig-298-\tdepends on NETFILTER_ADVANCED\nnet/netfilter/Kconfig:299:\tselect NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-300-\thelp\n" }
17/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24018 output: 37 thoughts: 46 Thoughts: Okay, here's my take on those thoughts: Streamlining the Netfilter Considerations Alright, it seems unnecessary to explicitly enumerate `NF_CONNTRACK_BROADCAST`. I can infer that based on the context, so there's no need for that overhead. Let's move on and ensure we're thorough. My next step will be to verify the usage and context of `NF_CONNTRACK_SNMP` within the `net/ipv4/netfilter/Makefile` file. Checking that Makefile should provide the necessary information.
18/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nf_nat_snmp_basic", "PathPrefix": "net/ipv4/netfilter/Makefile" } Results: { "Output": "net/ipv4/netfilter/Makefile=17=obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o\nnet/ipv4/netfilter/Makefile-18-\nnet/ipv4/netfilter/Makefile:19:nf_nat_snmp_basic-y := nf_nat_snmp_basic.asn1.o nf_nat_snmp_basic_main.o\nnet/ipv4/netfilter/Makefile:20:$(obj)/nf_nat_snmp_basic_main.o: $(obj)/nf_nat_snmp_basic.asn1.h\nnet/ipv4/netfilter/Makefile:21:obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o\nnet/ipv4/netfilter/Makefile-22-\n" }
19/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24427 output: 34 thoughts: 57 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: Investigating the SNMP NAT Module Right, so I see we're dealing with `nf_nat_snmp_basic_main.c`. That tells me we're working with the basic SNMP NAT implementation, and it's compiled conditionally under `CONFIG_NF_NAT_SNMP_BASIC`. Seems straightforward enough. The next logical step is to confirm the object file. Where does `nf_conntrack_snmp.o` live? It's likely built as part of the main `netfilter` subsystem, so I'll quickly check the `net/netfilter/Makefile`. That'll confirm the build process and any potential dependencies or linking issues. It's good to keep track of these things.
20/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nf_conntrack_snmp", "PathPrefix": "net/netfilter/Makefile" } Results: { "Output": "net/netfilter/Makefile=49=obj-$(CONFIG_NF_CONNTRACK_NETBIOS_NS) += nf_conntrack_netbios_ns.o\nnet/netfilter/Makefile:50:obj-$(CONFIG_NF_CONNTRACK_SNMP) += nf_conntrack_snmp.o\nnet/netfilter/Makefile-51-obj-$(CONFIG_NF_CONNTRACK_PPTP) += nf_conntrack_pptp.o\n" }
21/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24815 output: 40 thoughts: 235 Thoughts: Analyzing Connection Tracking Helper Configurations Okay, so I'm looking at this connection tracking stuff, specifically these kernel configurations: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, and so on, all the way down to `NF_NAT_SNMP_BASIC`. Clearly, these all relate to enabling and configuring various connection tracking helpers. I see a broad array, including protocols like FTP, H.323, IRC, and even SNMP. Good, I like that the modules are separated by specific needs. Now, I need to understand the underlying mechanics. I'm focusing on the core functions related to helper management: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. These clearly deal with registering, unregistering, finding, and managing the helper modules themselves within the Netfilter framework. The `nfnl_*` functions indicate the use of Netlink for communication. Before I go further, let me just double check `nfnetlink_cthelper.c` to see if there's anything else that's been touched in that file. It's always a good idea to perform a deeper dive into the file itself. I'm especially interested in looking for related functions that weren't included in the focus symbols, which could reveal important context that might get missed if I only looked at these functions.
22/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nfnl_cthelper_", "PathPrefix": "net/netfilter/nfnetlink_cthelper.c" } Results: { "Output": "net/netfilter/nfnetlink_cthelper.c=33=struct nfnl_cthelper {\n--\nnet/netfilter/nfnetlink_cthelper.c-37-\nnet/netfilter/nfnetlink_cthelper.c:38:static LIST_HEAD(nfnl_cthelper_list);\nnet/netfilter/nfnetlink_cthelper.c-39-\n--\nnet/netfilter/nfnetlink_cthelper.c=41=nfnl_userspace_cthelper(struct sk_buff skb, unsigned int protoff,\n--\nnet/netfilter/nfnetlink_cthelper.c-68-\nnet/netfilter/nfnetlink_cthelper.c:69:static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-70-\t[NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6),\n--\nnet/netfilter/nfnetlink_cthelper.c=74=static int\nnet/netfilter/nfnetlink_cthelper.c:75:nfnl_cthelper_parse_tuple(struct nf_conntrack_tuple tuple,\nnet/netfilter/nfnetlink_cthelper.c-76-\t\t\t const struct nlattr attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-81-\terr = nla_parse_nested_deprecated(tb, NFCTH_TUPLE_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:82:\t\t\t\t\t nfnl_cthelper_tuple_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-83-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c=98=static int\nnet/netfilter/nfnetlink_cthelper.c:99:nfnl_cthelper_from_nlattr(struct nlattr attr, struct nf_conn ct)\nnet/netfilter/nfnetlink_cthelper.c-100-{\n--\nnet/netfilter/nfnetlink_cthelper.c=118=static int\nnet/netfilter/nfnetlink_cthelper.c:119:nfnl_cthelper_to_nlattr(struct sk_buff skb, const struct nf_conn ct)\nnet/netfilter/nfnetlink_cthelper.c-120-{\n--\nnet/netfilter/nfnetlink_cthelper.c-137-\nnet/netfilter/nfnetlink_cthelper.c:138:static const struct nla_policy nfnl_cthelper_expect_pol[NFCTH_POLICY_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-139-\t[NFCTH_POLICY_NAME] = { .type = NLA_NUL_STRING,\n--\nnet/netfilter/nfnetlink_cthelper.c=145=static int\nnet/netfilter/nfnetlink_cthelper.c:146:nfnl_cthelper_expect_policy(struct nf_conntrack_expect_policy expect_policy,\nnet/netfilter/nfnetlink_cthelper.c-147-\t\t\t const struct nlattr attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-152-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:153:\t\t\t\t\t nfnl_cthelper_expect_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-154-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c=175=static const struct nla_policy\nnet/netfilter/nfnetlink_cthelper.c:176:nfnl_cthelper_expect_policy_set[NFCTH_POLICY_SET_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-177-\t[NFCTH_POLICY_SET_NUM] = NLA_POLICY_MAX(NLA_BE32, NF_CT_MAX_EXPECT_CLASSES),\n--\nnet/netfilter/nfnetlink_cthelper.c=180=static int\nnet/netfilter/nfnetlink_cthelper.c:181:nfnl_cthelper_parse_expect_policy(struct nf_conntrack_helper helper,\nnet/netfilter/nfnetlink_cthelper.c-182-\t\t\t\t const struct nlattr attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-188-\tret = nla_parse_nested_deprecated(tb, NFCTH_POLICY_SET_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:189:\t\t\t\t\t nfnl_cthelper_expect_policy_set,\nnet/netfilter/nfnetlink_cthelper.c-190-\t\t\t\t\t NULL);\n--\nnet/netfilter/nfnetlink_cthelper.c-206-\nnet/netfilter/nfnetlink_cthelper.c:207:\t\tret = nfnl_cthelper_expect_policy(\u0026helper-\u003eexpect_policy[i],\nnet/netfilter/nfnetlink_cthelper.c-208-\t\t\t\t\t\t tb[NFCTH_POLICY_SET+i]);\n--\nnet/netfilter/nfnetlink_cthelper.c=219=static int\nnet/netfilter/nfnetlink_cthelper.c:220:nfnl_cthelper_create(const struct nlattr const tb[],\nnet/netfilter/nfnetlink_cthelper.c-221-\t\t struct nf_conntrack_tuple tuple)\n--\nnet/netfilter/nfnetlink_cthelper.c-242-\nnet/netfilter/nfnetlink_cthelper.c:243:\tret = nfnl_cthelper_parse_expect_policy(helper, tb[NFCTH_POLICY]);\nnet/netfilter/nfnetlink_cthelper.c-244-\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-261-\thelper-\u003ehelp = nfnl_userspace_cthelper;\nnet/netfilter/nfnetlink_cthelper.c:262:\thelper-\u003efrom_nlattr = nfnl_cthelper_from_nlattr;\nnet/netfilter/nfnetlink_cthelper.c:263:\thelper-\u003eto_nlattr = nfnl_cthelper_to_nlattr;\nnet/netfilter/nfnetlink_cthelper.c-264-\n--\nnet/netfilter/nfnetlink_cthelper.c-285-\nnet/netfilter/nfnetlink_cthelper.c:286:\tlist_add_tail(\u0026nfcth-\u003elist, \u0026nfnl_cthelper_list);\nnet/netfilter/nfnetlink_cthelper.c-287-\treturn 0;\n--\nnet/netfilter/nfnetlink_cthelper.c=295=static int\nnet/netfilter/nfnetlink_cthelper.c:296:nfnl_cthelper_update_policy_one(const struct nf_conntrack_expect_policy policy,\nnet/netfilter/nfnetlink_cthelper.c-297-\t\t\t\tstruct nf_conntrack_expect_policy new_policy,\n--\nnet/netfilter/nfnetlink_cthelper.c-303-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:304:\t\t\t\t\t nfnl_cthelper_expect_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-305-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-326-\nnet/netfilter/nfnetlink_cthelper.c:327:static int nfnl_cthelper_update_policy_all(struct nlattr tb[],\nnet/netfilter/nfnetlink_cthelper.c-328-\t\t\t\t\t struct nf_conntrack_helper helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-347-\nnet/netfilter/nfnetlink_cthelper.c:348:\t\tret = nfnl_cthelper_update_policy_one(\u0026helper-\u003eexpect_policy[i],\nnet/netfilter/nfnetlink_cthelper.c-349-\t\t\t\t\t\t \u0026new_policy[i],\n--\nnet/netfilter/nfnetlink_cthelper.c-366-\nnet/netfilter/nfnetlink_cthelper.c:367:static int nfnl_cthelper_update_policy(struct nf_conntrack_helper helper,\nnet/netfilter/nfnetlink_cthelper.c-368-\t\t\t\t const struct nlattr attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-374-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_SET_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:375:\t\t\t\t\t nfnl_cthelper_expect_policy_set,\nnet/netfilter/nfnetlink_cthelper.c-376-\t\t\t\t\t NULL);\n--\nnet/netfilter/nfnetlink_cthelper.c-386-\nnet/netfilter/nfnetlink_cthelper.c:387:\treturn nfnl_cthelper_update_policy_all(tb, helper);\nnet/netfilter/nfnetlink_cthelper.c-388-}\n--\nnet/netfilter/nfnetlink_cthelper.c=390=static int\nnet/netfilter/nfnetlink_cthelper.c:391:nfnl_cthelper_update(const struct nlattr const tb[],\nnet/netfilter/nfnetlink_cthelper.c-392-\t\t struct nf_conntrack_helper helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-403-\tif (tb[NFCTH_POLICY]) {\nnet/netfilter/nfnetlink_cthelper.c:404:\t\tret = nfnl_cthelper_update_policy(helper, tb[NFCTH_POLICY]);\nnet/netfilter/nfnetlink_cthelper.c-405-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-425-\nnet/netfilter/nfnetlink_cthelper.c:426:static int nfnl_cthelper_new(struct sk_buff skb, const struct nfnl_info info,\nnet/netfilter/nfnetlink_cthelper.c-427-\t\t\t const struct nlattr const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-442-\nnet/netfilter/nfnetlink_cthelper.c:443:\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-444-\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-446-\nnet/netfilter/nfnetlink_cthelper.c:447:\tlist_for_each_entry(nlcth, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-448-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-464-\tif (helper == NULL)\nnet/netfilter/nfnetlink_cthelper.c:465:\t\tret = nfnl_cthelper_create(tb, \u0026tuple);\nnet/netfilter/nfnetlink_cthelper.c-466-\telse\nnet/netfilter/nfnetlink_cthelper.c:467:\t\tret = nfnl_cthelper_update(tb, helper);\nnet/netfilter/nfnetlink_cthelper.c-468-\n--\nnet/netfilter/nfnetlink_cthelper.c=472=static int\nnet/netfilter/nfnetlink_cthelper.c:473:nfnl_cthelper_dump_tuple(struct sk_buff skb,\nnet/netfilter/nfnetlink_cthelper.c-474-\t\t\t struct nf_conntrack_helper helper)\n--\nnet/netfilter/nfnetlink_cthelper.c=496=static int\nnet/netfilter/nfnetlink_cthelper.c:497:nfnl_cthelper_dump_policy(struct sk_buff skb,\nnet/netfilter/nfnetlink_cthelper.c-498-\t\t\tstruct nf_conntrack_helper helper)\n--\nnet/netfilter/nfnetlink_cthelper.c=537=static int\nnet/netfilter/nfnetlink_cthelper.c:538:nfnl_cthelper_fill_info(struct sk_buff skb, u32 portid, u32 seq, u32 type,\nnet/netfilter/nfnetlink_cthelper.c-539-\t\t\tint event, struct nf_conntrack_helper helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-556-\nnet/netfilter/nfnetlink_cthelper.c:557:\tif (nfnl_cthelper_dump_tuple(skb, helper) \u003c 0)\nnet/netfilter/nfnetlink_cthelper.c-558-\t\tgoto nla_put_failure;\nnet/netfilter/nfnetlink_cthelper.c-559-\nnet/netfilter/nfnetlink_cthelper.c:560:\tif (nfnl_cthelper_dump_policy(skb, helper) \u003c 0)\nnet/netfilter/nfnetlink_cthelper.c-561-\t\tgoto nla_put_failure;\n--\nnet/netfilter/nfnetlink_cthelper.c=583=static int\nnet/netfilter/nfnetlink_cthelper.c:584:nfnl_cthelper_dump_table(struct sk_buff skb, struct netlink_callback cb)\nnet/netfilter/nfnetlink_cthelper.c-585-{\n--\nnet/netfilter/nfnetlink_cthelper.c-606-\t\t\t}\nnet/netfilter/nfnetlink_cthelper.c:607:\t\t\tif (nfnl_cthelper_fill_info(skb,\nnet/netfilter/nfnetlink_cthelper.c-608-\t\t\t\t\t NETLINK_CB(cb-\u003eskb).portid,\n--\nnet/netfilter/nfnetlink_cthelper.c-625-\nnet/netfilter/nfnetlink_cthelper.c:626:static int nfnl_cthelper_get(struct sk_buff skb, const struct nfnl_info info,\nnet/netfilter/nfnetlink_cthelper.c-627-\t\t\t const struct nlattr * const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-641-\t\tstruct netlink_dump_control c = {\nnet/netfilter/nfnetlink_cthelper.c:642:\t\t\t.dump = nfnl_cthelper_dump_table,\nnet/netfilter/nfnetlink_cthelper.c-643-\t\t};\n--\nnet/netfilter/nfnetlink_cthelper.c-650-\tif (tb[NFCTH_TUPLE]) {\nnet/netfilter/nfnetlink_cthelper.c:651:\t\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-652-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-657-\nnet/netfilter/nfnetlink_cthelper.c:658:\tlist_for_each_entry(nlcth, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-659-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-674-\nnet/netfilter/nfnetlink_cthelper.c:675:\t\tret = nfnl_cthelper_fill_info(skb2, NETLINK_CB(skb).portid,\nnet/netfilter/nfnetlink_cthelper.c-676-\t\t\t\t\t info-\u003enlh-\u003enlmsg_seq,\n--\nnet/netfilter/nfnetlink_cthelper.c-690-\nnet/netfilter/nfnetlink_cthelper.c:691:static int nfnl_cthelper_del(struct sk_buff skb, const struct nfnl_info info,\nnet/netfilter/nfnetlink_cthelper.c-692-\t\t\t const struct nlattr * const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-707-\tif (tb[NFCTH_TUPLE]) {\nnet/netfilter/nfnetlink_cthelper.c:708:\t\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-709-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-715-\tret = -ENOENT;\nnet/netfilter/nfnetlink_cthelper.c:716:\tlist_for_each_entry_safe(nlcth, n, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-717-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-739-\nnet/netfilter/nfnetlink_cthelper.c:740:static const struct nla_policy nfnl_cthelper_policy[NFCTH_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-741-\t[NFCTH_NAME] = { .type = NLA_NUL_STRING,\n--\nnet/netfilter/nfnetlink_cthelper.c-747-\nnet/netfilter/nfnetlink_cthelper.c:748:static const struct nfnl_callback nfnl_cthelper_cb[NFNL_MSG_CTHELPER_MAX] = {\nnet/netfilter/nfnetlink_cthelper.c-749-\t[NFNL_MSG_CTHELPER_NEW]\t= {\nnet/netfilter/nfnetlink_cthelper.c:750:\t\t.call\t\t= nfnl_cthelper_new,\nnet/netfilter/nfnetlink_cthelper.c-751-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-752-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:753:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-754-\t},\nnet/netfilter/nfnetlink_cthelper.c-755-\t[NFNL_MSG_CTHELPER_GET] = {\nnet/netfilter/nfnetlink_cthelper.c:756:\t\t.call\t\t= nfnl_cthelper_get,\nnet/netfilter/nfnetlink_cthelper.c-757-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-758-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:759:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-760-\t},\nnet/netfilter/nfnetlink_cthelper.c-761-\t[NFNL_MSG_CTHELPER_DEL]\t= {\nnet/netfilter/nfnetlink_cthelper.c:762:\t\t.call\t\t= nfnl_cthelper_del,\nnet/netfilter/nfnetlink_cthelper.c-763-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-764-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:765:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-766-\t},\n--\nnet/netfilter/nfnetlink_cthelper.c-768-\nnet/netfilter/nfnetlink_cthelper.c:769:static const struct nfnetlink_subsystem nfnl_cthelper_subsys = {\nnet/netfilter/nfnetlink_cthelper.c-770-\t.name\t\t\t\t= \"cthelper\",\n--\nnet/netfilter/nfnetlink_cthelper.c-772-\t.cb_count\t\t\t= NFNL_MSG_CTHELPER_MAX,\nnet/netfilter/nfnetlink_cthelper.c:773:\t.cb\t\t\t\t= nfnl_cthelper_cb,\nnet/netfilter/nfnetlink_cthelper.c-774-};\n--\nnet/netfilter/nfnetlink_cthelper.c=776=MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTHELPER);\nnet/netfilter/nfnetlink_cthelper.c-777-\nnet/netfilter/nfnetlink_cthelper.c:778:static int __init nfnl_cthelper_init(void)\nnet/netfilter/nfnetlink_cthelper.c-779-{\n--\nnet/netfilter/nfnetlink_cthelper.c-781-\nnet/netfilter/nfnetlink_cthelper.c:782:\tret = nfnetlink_subsys_register(\u0026nfnl_cthelper_subsys);\nnet/netfilter/nfnetlink_cthelper.c-783-\tif (ret \u003c 0) {\n--\nnet/netfilter/nfnetlink_cthelper.c-791-\nnet/netfilter/nfnetlink_cthelper.c:792:static void __exit nfnl_cthelper_exit(void)\nnet/netfilter/nfnetlink_cthelper.c-793-{\n--\nnet/netfilter/nfnetlink_cthelper.c-796-\nnet/netfilter/nfnetlink_cthelper.c:797:\tnfnetlink_subsys_unregister(\u0026nfnl_cthelper_subsys);\nnet/netfilter/nfnetlink_cthelper.c-798-\nnet/netfilter/nfnetlink_cthelper.c:799:\tlist_for_each_entry_safe(nlcth, n, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-800-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-806-\nnet/netfilter/nfnetlink_cthelper.c:807:module_init(nfnl_cthelper_init);\nnet/netfilter/nfnetlink_cthelper.c:808:module_exit(nfnl_cthelper_exit);\n" }
23/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 31403 output: 34 thoughts: 106 Thoughts: My Analysis of Conntrack Helper Functions Okay, so I need to zero in on specific functions within the `nf_conntrack_helper.c` file. The core ones to focus on for this investigation are: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. I'm guessing these are the crucial registration, lookup, creation, and deletion mechanisms related to connection tracking helpers. Before I go further, it's worth a quick sweep of that file. I want to make absolutely sure I haven't missed a function that was touched during the changes. This quick check will give me a comprehensive overview.
24/2	2026/06/26 18:10	tool	grepper	0m Error: no matches Args: { "Expression": "nf_conntrack_helper.c", "PathPrefix": "net/netfilter/" } Results: { "error": "no matches" }
25/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 31742 output: 37 thoughts: 28 Thoughts: Okay, here's my summary, presented as a stream of thought: Checking `helper_hash` in `nf_conntrack_helper.c` Alright, I'm thinking about this conntrack helper issue... Where should I start my investigation? The kernel's conntrack helper implementation is complex. Let's see... a quick mental review suggests a good starting point is likely to involve the helper hash table itself. I need to understand how the system identifies and stores these helpers. I'm going to quickly check in `net/netfilter/nf_conntrack_helper.c`, and specifically grep for `helper_hash`. It should show me the relevant code that manages the helper's internal structure in that module. That should give me the entry point and initial context I need to pursue this deeper.
26/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "helper_hash", "PathPrefix": "net/netfilter/nf_conntrack_helper.c" } Results: { "Output": "net/netfilter/nf_conntrack_helper.c=33=static DEFINE_MUTEX(nf_ct_helper_mutex);\nnet/netfilter/nf_conntrack_helper.c:34:struct hlist_head nf_ct_helper_hash __read_mostly;\nnet/netfilter/nf_conntrack_helper.c:35:EXPORT_SYMBOL_GPL(nf_ct_helper_hash);\nnet/netfilter/nf_conntrack_helper.c-36-unsigned int nf_ct_helper_hsize __read_mostly;\n--\nnet/netfilter/nf_conntrack_helper.c=41=static struct list_head nf_ct_nat_helpers __read_mostly;\nnet/netfilter/nf_conntrack_helper.c-42-\nnet/netfilter/nf_conntrack_helper.c:43:static unsigned int helper_hash(const char name, u8 protonum)\nnet/netfilter/nf_conntrack_helper.c-44-{\n--\nnet/netfilter/nf_conntrack_helper.c=56=__nf_conntrack_helper_find(const char name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-60-\nnet/netfilter/nf_conntrack_helper.c:61:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-62-\t\treturn NULL;\nnet/netfilter/nf_conntrack_helper.c-63-\nnet/netfilter/nf_conntrack_helper.c:64:\ti = helper_hash(name, protonum);\nnet/netfilter/nf_conntrack_helper.c-65-\nnet/netfilter/nf_conntrack_helper.c:66:\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\nnet/netfilter/nf_conntrack_helper.c-67-\t\tif (strcmp(h-\u003ename, name))\n--\nnet/netfilter/nf_conntrack_helper.c=368=int __nf_conntrack_helper_register(struct nf_conntrack_helper me)\n--\nnet/netfilter/nf_conntrack_helper.c-376-\nnet/netfilter/nf_conntrack_helper.c:377:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-378-\t\treturn -ENOENT;\n--\nnet/netfilter/nf_conntrack_helper.c-387-\nnet/netfilter/nf_conntrack_helper.c:388:\th = helper_hash(me-\u003ename, me-\u003el4proto);\nnet/netfilter/nf_conntrack_helper.c-389-\tmutex_lock(\u0026nf_ct_helper_mutex);\nnet/netfilter/nf_conntrack_helper.c:390:\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\nnet/netfilter/nf_conntrack_helper.c-391-\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n--\nnet/netfilter/nf_conntrack_helper.c-400-\trefcount_set(\u0026me-\u003ect_refcnt, 1);\nnet/netfilter/nf_conntrack_helper.c:401:\thlist_add_head_rcu(\u0026me-\u003ehnode, \u0026nf_ct_helper_hash[h]);\nnet/netfilter/nf_conntrack_helper.c-402-\tnf_ct_helper_count++;\n--\nnet/netfilter/nf_conntrack_helper.c=566=int nf_conntrack_helper_init(void)\n--\nnet/netfilter/nf_conntrack_helper.c-568-\tnf_ct_helper_hsize = 1; /* gets rounded up to use one page */\nnet/netfilter/nf_conntrack_helper.c:569:\tnf_ct_helper_hash =\nnet/netfilter/nf_conntrack_helper.c-570-\t\tnf_ct_alloc_hashtable(\u0026nf_ct_helper_hsize, 0);\nnet/netfilter/nf_conntrack_helper.c:571:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-572-\t\treturn -ENOMEM;\n--\nnet/netfilter/nf_conntrack_helper.c=578=void nf_conntrack_helper_fini(void)\nnet/netfilter/nf_conntrack_helper.c-579-{\nnet/netfilter/nf_conntrack_helper.c:580:\tkvfree(nf_ct_helper_hash);\nnet/netfilter/nf_conntrack_helper.c:581:\tnf_ct_helper_hash = NULL;\nnet/netfilter/nf_conntrack_helper.c-582-}\n" }
27/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 33275 output: 38 thoughts: 456 Thoughts: Refactoring the Connection Tracking Helper Infrastructure Okay, so I've been digging into this connection tracking helper code, and it looks like there's a significant refactor underway. The core change is the adoption of `jhash` within the `helper_hash` function, which replaces the simpler bitwise operation. That's a definite performance optimization – good to see. Beyond the hashing, the signature of the `nf_ct_helper_init` function has also been tweaked. And this change ripples through the core helper management functions. I'm focusing on the changes to `__nf_conntrack_helper_register` and `__nf_conntrack_helper_find`. It's clear that the new hash function and the introduction of `nfproto` and `l4proto` fields are being integrated here, and I'll need to check how these impact overall performance. Then there's the `nfnetlink_cthelper.c` file. The changes there, within `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, and `nfnl_cthelper_create`, are also important. These functions are being updated to use the new fields too, indicating that they’re being harmonized with the updated helper model, which is necessary. I expect some performance improvement or bug fixes here. Now, let me just quickly run through the relevant Kconfig options to see if anything else is impacted. Okay, I've got a list here: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, then the more specific helpers: `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`. I'm going to quickly check how `NF_NAT_SNMP_BASIC` interacts with all of this. Ah, and it's for `nf_nat_snmp_basic_main.c` so it's probably not directly affected here. Alright, let's just confirm by looking at the `net/ipv4/netfilter/Kconfig` file, just to be thorough. Okay, good. That should be everything.
28/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "NF_NAT_SNMP_BASIC", "PathPrefix": "net/ipv4/netfilter/Kconfig" } Results: { "Output": "net/ipv4/netfilter/Kconfig=99=if NF_NAT\nnet/ipv4/netfilter/Kconfig:100:config NF_NAT_SNMP_BASIC\nnet/ipv4/netfilter/Kconfig-101-\ttristate \"Basic SNMP-ALG support\"\n" }
29/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 34389 output: 33 thoughts: 90 Thoughts: Okay, here's my take on those thoughts, framed from my perspective: Debugging Network Connection Tracking Alright, confirming that `NF_NAT_SNMP_BASIC` is indeed the correct flag to be focusing on. Given the recent modifications to files like `net/netfilter/nf_conntrack_ovs.c`, I need to investigate connection tracking specifically related to Open vSwitch. It looks like the standard kernel might not have that exact filename. It's probably related to an `openvswitch` module, so I should change direction.
30/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "nf_conntrack_ovs", "PathPrefix": "net/netfilter/" } Results: { "Output": "net/netfilter/Makefile=14=nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o\nnet/netfilter/Makefile:15:nf_conntrack-$(CONFIG_NF_CONNTRACK_OVS) += nf_conntrack_ovs.o\nnet/netfilter/Makefile-16-nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o\n" }
31/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 34764 output: 34 thoughts: 28 Thoughts: Okay, here's my summarized thought process, presented as if I were thinking it: Digging into the Kernel Configuration Right, so I see this `CONFIG_NF_CONNTRACK_OVS` option... that's interesting. I immediately need to understand where that is defined and what dependencies it has. My instinct is to head straight to `net/netfilter/Kconfig` – that's the likely location for Netfilter-related configurations. I need to get a clear picture of how this option fits into the broader Netfilter ecosystem. Knowing the context of this configuration option is key to assessing its relevance.
32/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "NF_CONNTRACK_OVS", "PathPrefix": "net/netfilter/Kconfig" } Results: { "Output": "net/netfilter/Kconfig=188=config NF_CONNTRACK_LABELS\n--\nnet/netfilter/Kconfig-194-\nnet/netfilter/Kconfig:195:config NF_CONNTRACK_OVS\nnet/netfilter/Kconfig-196-\tbool\n" }
33/2	2026/06/26 18:10	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35041 output: 28 thoughts: 15 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience and written in the first person: Analyzing a Boolean Configuration Okay, so I'm looking at this boolean config. My initial thought is, "Alright, let's see what's actually using this thing." I need to understand its impact and where it's being evaluated to determine its purpose and potential consequences if it's toggled. My primary concern is quickly identifying all the dependencies and downstream implications. I'm essentially tracing its usage – which modules, functions, or even other configs reference or depend on its state? Is it just a simple flag, or does its value directly influence critical calculations, conditional branches, or resource allocations within the system? I'm already anticipating that it will not be just a simple single line of usage. So I'll go through and check this item for all references to the value this config represents and understand the usage.
34/2	2026/06/26 18:10	tool	grepper	0m Args: { "Expression": "select NF_CONNTRACK_OVS", "PathPrefix": "" } Results: { "Output": "net/openvswitch/Kconfig=6=config OPENVSWITCH\n--\nnet/openvswitch/Kconfig-18-\tselect NET_NSH\nnet/openvswitch/Kconfig:19:\tselect NF_CONNTRACK_OVS if NF_CONNTRACK\nnet/openvswitch/Kconfig-20-\tselect NF_NAT_OVS if NF_NAT\n--\nnet/sched/Kconfig=917=config NET_ACT_CT\n--\nnet/sched/Kconfig-919-\tdepends on NET_CLS_ACT \u0026\u0026 NF_CONNTRACK \u0026\u0026 (!NF_NAT \|\| NF_NAT) \u0026\u0026 NF_FLOW_TABLE\nnet/sched/Kconfig:920:\tselect NF_CONNTRACK_OVS\nnet/sched/Kconfig-921-\tselect NF_NAT_OVS if NF_NAT\n" }
35/2	2026/06/26 18:11	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35492 output: 40 thoughts: 496 Thoughts: My Conntrack Configuration Review Okay, so I'm looking at these kernel configurations related to connection tracking, specifically focusing on how they relate to Open vSwitch. The initial observation is that `OPENVSWITCH` and `NET_ACT_CT` seem like the key drivers here, and enabling them seems like a logical starting point. I'll just keep those in mind. Now, let's go through the configs themselves: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, and the various application-specific helpers: `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, etc. Right now it's just a raw list. Wait a second… `NF_CONNTRACK_OVS` is a boolean. If I enable `OPENVSWITCH` and `NET_ACT_CT`, that should automatically enable `NF_CONNTRACK_OVS`. That's important to remember, as it reduces the complexity of explicitly managing that config separately. Let's do a quick scan to make sure there are no other dependent configs. Aha! `NF_CONNTRACK_BROADCAST` is selected by both `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. Interesting. Now, let's revisit the focus symbols. I've been thinking about the core helper functions: `__nf_conntrack_helper_register`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create`, and `nf_ct_helper_init`. Ah, here's a good one: `nf_ct_helper_init`. It seems like all the helper modules are calling this during initialization. That’s a key integration point. I should also check the `helper_hash`. It's static, so I can't directly use it as a symbol to analyze the code. However, it's called by `__nf_conntrack_helper_register` and `__nf_conntrack_helper_find`, so those are still good symbols to focus on. Wait, there is also `nf_ct_helper` in `net/netfilter/nf_conntrack_ovs.c`. Let's take a look.
36/2	2026/06/26 18:11	tool	grepper	0m Args: { "Expression": "nf_ct_helper", "PathPrefix": "net/netfilter/nf_conntrack_ovs.c" } Results: { "Output": "net/netfilter/nf_conntrack_ovs.c-11-/* 'skb' should already be pulled to nh_ofs. /\nnet/netfilter/nf_conntrack_ovs.c:12:int nf_ct_helper(struct sk_buff skb, struct nf_conn ct,\nnet/netfilter/nf_conntrack_ovs.c-13-\t\t enum ip_conntrack_info ctinfo, u16 proto)\n--\nnet/netfilter/nf_conntrack_ovs.c-82-}\nnet/netfilter/nf_conntrack_ovs.c:83:EXPORT_SYMBOL_GPL(nf_ct_helper);\nnet/netfilter/nf_conntrack_ovs.c-84-\nnet/netfilter/nf_conntrack_ovs.c=85=int nf_ct_add_helper(struct nf_conn ct, const char *name, u8 family,\n--\nnet/netfilter/nf_conntrack_ovs.c-95-\nnet/netfilter/nf_conntrack_ovs.c:96:\thelp = nf_ct_helper_ext_add(ct, GFP_KERNEL);\nnet/netfilter/nf_conntrack_ovs.c-97-\tif (!help) {\n" }
37/2	2026/06/26 18:11	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 36883 output: 43 thoughts: 61 Thoughts: Focusing on `nf_ct_helper` Okay, so I've confirmed that `nf_ct_helper` is indeed exported and, crucially, modified. That's a key observation. The way it works, as I understand it, involves checking `helper->nfproto` and `helper->l4proto`. This makes `nf_ct_helper` a strong candidate - a good symbol to concentrate on. My next step will be to dive into `nf_conntrack_broadcast.c`. Let's see what that reveals.
38/2	2026/06/26 18:11	tool	grepper	0m Args: { "Expression": "nf_conntrack_broadcast_help", "PathPrefix": "net/netfilter/nf_conntrack_broadcast.c" } Results: { "Output": "net/netfilter/nf_conntrack_broadcast.c-17-\nnet/netfilter/nf_conntrack_broadcast.c:18:int nf_conntrack_broadcast_help(struct sk_buff skb,\nnet/netfilter/nf_conntrack_broadcast.c-19-\t\t\t\tstruct nf_conn ct,\n--\nnet/netfilter/nf_conntrack_broadcast.c-88-}\nnet/netfilter/nf_conntrack_broadcast.c:89:EXPORT_SYMBOL_GPL(nf_conntrack_broadcast_help);\nnet/netfilter/nf_conntrack_broadcast.c-90-\n" }
39/2	2026/06/26 18:11	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 37278 output: 39 thoughts: 69 Thoughts: Here's my summary, as the expert: Investigating the `nf_conntrack` Broadcast Helper Modification Okay, so I see they removed that line, `exp->tuple.src.u.udp.port = helper->tuple.src.u.udp.port;`, from `nf_conntrack_broadcast_help`. That's interesting, and it immediately catches my eye as a potential point of impact. I can certainly see why this change might be significant, and it's a good place to focus. Now, my next step is to see if this has implications elsewhere. Let's delve into `nf_conntrack_amanda.c` and see if the Amanda module is impacted by this change. I'll need to understand the implications of this particular port assignment, and how it’s being handled or circumvented now. I'm going to determine if this has the desired outcome or if it has introduced a regression. I will proceed with caution.
40/2	2026/06/26 18:11	tool	grepper	0m Args: { "Expression": "amanda_help", "PathPrefix": "net/netfilter/nf_conntrack_amanda.c" } Results: { "Output": "net/netfilter/nf_conntrack_amanda.c=52=static struct {\n--\nnet/netfilter/nf_conntrack_amanda.c-82-\nnet/netfilter/nf_conntrack_amanda.c:83:static int amanda_help(struct sk_buff skb,\nnet/netfilter/nf_conntrack_amanda.c-84-\t\t unsigned int protoff,\n--\nnet/netfilter/nf_conntrack_amanda.c-107-\tif (dataoff \u003e= skb-\u003elen) {\nnet/netfilter/nf_conntrack_amanda.c:108:\t\tnet_err_ratelimited(\"amanda_help: skblen = %u\\n\", skb-\u003elen);\nnet/netfilter/nf_conntrack_amanda.c-109-\t\treturn NF_ACCEPT;\n--\nnet/netfilter/nf_conntrack_amanda.c=167=static const struct nf_conntrack_expect_policy amanda_exp_policy = {\n--\nnet/netfilter/nf_conntrack_amanda.c-171-\nnet/netfilter/nf_conntrack_amanda.c:172:static struct nf_conntrack_helper amanda_helper[2] __read_mostly;\nnet/netfilter/nf_conntrack_amanda.c:173:static struct nf_conntrack_helper amanda_helper_ptr[2] __read_mostly;\nnet/netfilter/nf_conntrack_amanda.c-174-\nnet/netfilter/nf_conntrack_amanda.c=175=static void __exit nf_conntrack_amanda_fini(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-178-\nnet/netfilter/nf_conntrack_amanda.c:179:\tnf_conntrack_helpers_unregister(amanda_helper_ptr,\nnet/netfilter/nf_conntrack_amanda.c:180:\t\t\t\t\tARRAY_SIZE(amanda_helper_ptr));\nnet/netfilter/nf_conntrack_amanda.c-181-\tfor (i = 0; i \u003c ARRAY_SIZE(search); i++)\n--\nnet/netfilter/nf_conntrack_amanda.c=185=static int __init nf_conntrack_amanda_init(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-200-\nnet/netfilter/nf_conntrack_amanda.c:201:\tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-202-\t\t\t HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c:203:\t\t\t \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c:204:\tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-205-\t\t\t HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c:206:\t\t\t \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c-207-\nnet/netfilter/nf_conntrack_amanda.c:208:\tret = nf_conntrack_helpers_register(amanda_helper,\nnet/netfilter/nf_conntrack_amanda.c:209:\t\t\t\t\t ARRAY_SIZE(amanda_helper),\nnet/netfilter/nf_conntrack_amanda.c:210:\t\t\t\t\t amanda_helper_ptr);\nnet/netfilter/nf_conntrack_amanda.c-211-\tif (ret \u003c 0)\n" }
41/2	2026/06/26 18:11	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 38626 output: 36 thoughts: 958 Thoughts: Focusing the Fuzzing Effort: Connection Tracking Helpers Okay, so this patch is touching `nf_ct_helper_init` in a bunch of connection tracking helper modules. My initial thought is that the most relevant symbols to focus on for fuzzing are going to be the initialization functions of these modules, or perhaps just `nf_ct_helper_init` and `__nf_conntrack_helper_register` directly. However, since the initialization happens only once during module load, fuzzing those directly probably won't be as fruitful as targeting things that are constantly in use. The real meat will likely be in the netlink interface – `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create` – and, crucially, the packet path itself: `nf_ct_helper` and `nf_conntrack_broadcast_help`. Don't forget, `__nf_conntrack_helper_find` gets called whenever a packet matches a helper or when one is assigned via netlink or nftables. So, let me summarize the key focus symbols: * `__nf_conntrack_helper_register` * `__nf_conntrack_helper_find` * `nf_ct_helper_init` * `nfnl_cthelper_new` * `nfnl_cthelper_get` * `nfnl_cthelper_del` * `nfnl_cthelper_create` * `nf_ct_helper` * `nf_conntrack_broadcast_help` Now, regarding the configuration options, let's nail down what needs to be enabled to properly test this. I see a bunch of options listed: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, `NF_NAT_SNMP_BASIC`, `OPENVSWITCH`, and `NET_ACT_CT`. Wait, `NF_CONNTRACK_OVS` is selected by `OPENVSWITCH` and `NET_ACT_CT`, so I can just include those two instead. Alright, let's double-check if there are any other configs. It looks like `NF_CONNTRACK_BROADCAST` is selected by `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. I'll keep that in mind. Let me check if `NF_CONNTRACK_OVS` is in `net/netfilter/Makefile`. Yes, I see the entry: `obj-$(CONFIG_NF_CONNTRACK_OVS) += nf_conntrack_ovs.o`. Now, I need to make sure I'm not missing any dependencies. Does `NF_NAT_SNMP_BASIC` require `NF_NAT`? Yes, it does. Include `NF_NAT`. Does `NF_CONNTRACK_SNMP` require `NETFILTER_ADVANCED`? Yes, I need `NETFILTER_ADVANCED`. Let's do a quick check on the others. Does `NF_CONNTRACK_PPTP` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_H323` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_SANE` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_TFTP` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_SIP` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_IRC` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_FTP` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_AMANDA` require `NF_CONNTRACK`? Yes. Does `NF_CONNTRACK_NETBIOS_NS` require `NF_CONNTRACK`? Yes. Does `NF_CT_NETLINK_HELPER` require `NF_CT_NETLINK`? Yes, it does. Include `NF_CT_NETLINK`. Okay, I think I've got a solid list of symbols and configuration options. Now
42/2	2026/06/26 18:11	tool	grepper	0m Args: { "Expression": "NF_CT_NETLINK_HELPER", "PathPrefix": "net/netfilter/Kconfig" } Results: { "Output": "net/netfilter/Kconfig=373=config NF_CT_NETLINK_TIMEOUT\n--\nnet/netfilter/Kconfig-384-\nnet/netfilter/Kconfig:385:config NF_CT_NETLINK_HELPER\nnet/netfilter/Kconfig-386-\ttristate 'Connection tracking helpers in user-space via Netlink'\n" }
43/2	2026/06/26 18:11	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 40746 output: 37 thoughts: 18 Thoughts: Here's my thought process, summarized as if I were considering the provided prompt: Analyzing the Dependency Landscape of NF_CT_NETLINK_HELPER Okay, so the task at hand is to summarize a thought process focused on `NF_CT_NETLINK_HELPER`. My immediate focus is going to be on the dependencies of this specific component. I know it's a kernel module, likely related to netfilter and connection tracking, and that "NETLINK" suggests communication with userspace. Therefore, my first thought is to dissect what other kernel modules or functions `NF_CT_NETLINK_HELPER` relies upon to function correctly. I'll need to think about which other parts of the netfilter framework might be integrated, any related data structures, and the possible interactions with user-space tools and interfaces. I'll need to figure out what functionality this helper provides and from which parts of the kernel it's used. This dependency analysis is crucial to understand the implications of any changes or potential vulnerabilities. I'll be thinking in terms of the kernel build system and potential build order concerns.
44/2	2026/06/26 18:12	tool	grepper	0m Args: { "Expression": "config NF_CT_NETLINK_HELPER", "PathPrefix": "net/netfilter/Kconfig" } Results: { "Output": "net/netfilter/Kconfig=373=config NF_CT_NETLINK_TIMEOUT\n--\nnet/netfilter/Kconfig-384-\nnet/netfilter/Kconfig:385:config NF_CT_NETLINK_HELPER\nnet/netfilter/Kconfig-386-\ttristate 'Connection tracking helpers in user-space via Netlink'\n" }
45/2	2026/06/26 18:12	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 41138 output: 35 thoughts: 19 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person: Analyzing the Netfilter Configuration Alright, so the instruction says to look at the lines after `config NF_CT_NETLINK_HELPER`. My immediate thought is, "Okay, this is about Netfilter and likely its connection tracking module." That `config` line is a configuration option, and the subsequent lines, wherever they are, will tell me something about how that module, `NF_CT_NETLINK_HELPER`, is configured or what its dependencies are. Knowing how that component is configured is crucial, especially because I have to understand the bigger picture and the interactions with other Netfilter modules and kernel subsystems. I want to see what options might affect the behavior of Netfilter in terms of connection tracking and potential netlink interactions. This is going to be important in terms of performance and behavior of any custom firewall rules or network applications depending on that part of the kernel. I anticipate seeing dependencies, default values, and maybe even descriptions of how to enable or disable related features. Let's dig in and see what those lines reveal!
46/2	2026/06/26 18:12	tool	read-file	0m Args: { "File": "net/netfilter/Kconfig", "FirstLine": 385, "LineCount": 10 } Results: { "Contents": " 385:\tconfig NF_CT_NETLINK_HELPER\n 386:\t\ttristate 'Connection tracking helpers in user-space via Netlink'\n 387:\t\tselect NETFILTER_NETLINK\n 388:\t\tdepends on NF_CT_NETLINK\n 389:\t\tdepends on NETFILTER_NETLINK_QUEUE\n 390:\t\tdepends on NETFILTER_NETLINK_GLUE_CT\n 391:\t\tdepends on NETFILTER_ADVANCED\n 392:\t\thelp\n 393:\t\t This option enables the user-space connection tracking helpers\n 394:\t\t infrastructure.\n" }
47/2	2026/06/26 18:12	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 41600 output: 38 thoughts: 97 Thoughts: Okay, here's my take on those considerations. Kernel Configuration Dependencies for Netfilter Netlink Functionality Right, so to get this Netfilter Netlink functionality working as intended, it's pretty clear we need to make sure a few kernel configuration options are enabled. The core dependency here seems to hinge on `NF_CT_NETLINK`, that’s the starting point. But, of course, that's not the end of the story. We'll also need `NETFILTER_NETLINK_QUEUE` for the queuing mechanism and `NETFILTER_NETLINK_GLUE_CT` - presumably there's some connection there for glueing things together, specifically `ct`. And lastly, `NETFILTER_ADVANCED` feels like a prudent choice, as often the advanced features enable other needed functionality. I'll make a point of explicitly including `NF_CT_NETLINK`, `NETFILTER_NETLINK_QUEUE`, `NETFILTER_NETLINK_GLUE_CT`, and `NETFILTER_ADVANCED` in the build configuration, just to be sure we're covered. Now, I want to take a closer look at `NETFILTER_NETLINK_GLUE_CT` specifically and ensure I understand the impact there.
48/2	2026/06/26 18:12	tool	grepper	0m Args: { "Expression": "config NETFILTER_NETLINK_GLUE_CT", "PathPrefix": "net/netfilter/Kconfig" } Results: { "Output": "net/netfilter/Kconfig=385=config NF_CT_NETLINK_HELPER\n--\nnet/netfilter/Kconfig-397-\nnet/netfilter/Kconfig:398:config NETFILTER_NETLINK_GLUE_CT\nnet/netfilter/Kconfig-399-\tbool \"NFQUEUE and NFLOG integration with Connection Tracking\"\n" }
49/2	2026/06/26 18:12	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 42100 output: 387 thoughts: 469 Thoughts: Analyzing the Conntrack Helper Patch Alright, let's break this down. My initial assessment is that the patch seems functional and warrants fuzzing. I've got a list of the relevant configurations: `NF_CONNTRACK`, `NF_CT_NETLINK`, `NETFILTER_NETLINK_QUEUE`, `NETFILTER_NETLINK_GLUE_CT`, `NETFILTER_ADVANCED`, `NF_CT_NETLINK_HELPER`, and then the various application-specific conntrack helpers like FTP, H323, IRC, etc. We also have `NF_NAT` and some associated modules. Crucially, `OPENVSWITCH` and `NET_ACT_CT` are in the mix as well. The patch itself is focusing on a core area: conntrack helper registration and matching. It's moving away from port-based matching and towards just L3/L4 protocol matching. That's a fundamental change in how helpers get assigned to connections, which is definitely a critical component of netfilter conntrack and is an area that could have interesting implications. I've flagged the key symbols involved in this: `__nf_conntrack_helper_register`, `__nf_conntrack_helper_find`, `nf_ct_helper_init`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create`, `nf_ct_helper`, and `nf_conntrack_broadcast_help`. Now, let's cross-reference these configs. We have a few dependencies to consider. `NF_CONNTRACK_OVS` is a dependency of both `OPENVSWITCH` and `NET_ACT_CT`. `NF_CONNTRACK_BROADCAST` is selected by both `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. And `NF_NAT_SNMP_BASIC` is dependent on `NF_NAT`. I'll consolidate this information into a clear report.
50/2	2026/06/26 18:12	tool	set-results	0m Args: { "EnableConfigs": [ "NF_CONNTRACK", "NF_CT_NETLINK", "NETFILTER_NETLINK_QUEUE", "NETFILTER_NETLINK_GLUE_CT", "NETFILTER_ADVANCED", "NF_CT_NETLINK_HELPER", "NF_CONNTRACK_AMANDA", "NF_CONNTRACK_FTP", "NF_CONNTRACK_H323", "NF_CONNTRACK_IRC", "NF_CONNTRACK_NETBIOS_NS", "NF_CONNTRACK_PPTP", "NF_CONNTRACK_SANE", "NF_CONNTRACK_SIP", "NF_CONNTRACK_TFTP", "NF_CONNTRACK_SNMP", "NF_NAT", "NF_NAT_SNMP_BASIC", "OPENVSWITCH", "NET_ACT_CT" ], "FocusSymbols": [ "__nf_conntrack_helper_register", "__nf_conntrack_helper_find", "nf_ct_helper_init", "nfnl_cthelper_new", "nfnl_cthelper_get", "nfnl_cthelper_del", "nfnl_cthelper_create", "nf_ct_helper", "nf_conntrack_broadcast_help" ], "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.", "WorthFuzzing": true } Results: { "EnableConfigs": [ "NF_CONNTRACK", "NF_CT_NETLINK", "NETFILTER_NETLINK_QUEUE", "NETFILTER_NETLINK_GLUE_CT", "NETFILTER_ADVANCED", "NF_CT_NETLINK_HELPER", "NF_CONNTRACK_AMANDA", "NF_CONNTRACK_FTP", "NF_CONNTRACK_H323", "NF_CONNTRACK_IRC", "NF_CONNTRACK_NETBIOS_NS", "NF_CONNTRACK_PPTP", "NF_CONNTRACK_SANE", "NF_CONNTRACK_SIP", "NF_CONNTRACK_TFTP", "NF_CONNTRACK_SNMP", "NF_NAT", "NF_NAT_SNMP_BASIC", "OPENVSWITCH", "NET_ACT_CT" ], "FocusSymbols": [ "__nf_conntrack_helper_register", "__nf_conntrack_helper_find", "nf_ct_helper_init", "nfnl_cthelper_new", "nfnl_cthelper_get", "nfnl_cthelper_del", "nfnl_cthelper_create", "nf_ct_helper", "nf_conntrack_broadcast_help" ], "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.", "WorthFuzzing": true }

{
  "EnableConfigs": [
    "NF_CONNTRACK",
    "NF_CT_NETLINK",
    "NETFILTER_NETLINK_QUEUE",
    "NETFILTER_NETLINK_GLUE_CT",
    "NETFILTER_ADVANCED",
    "NF_CT_NETLINK_HELPER",
    "NF_CONNTRACK_AMANDA",
    "NF_CONNTRACK_FTP",
    "NF_CONNTRACK_H323",
    "NF_CONNTRACK_IRC",
    "NF_CONNTRACK_NETBIOS_NS",
    "NF_CONNTRACK_PPTP",
    "NF_CONNTRACK_SANE",
    "NF_CONNTRACK_SIP",
    "NF_CONNTRACK_TFTP",
    "NF_CONNTRACK_SNMP",
    "NF_NAT",
    "NF_NAT_SNMP_BASIC",
    "OPENVSWITCH",
    "NET_ACT_CT"
  ],
  "FocusSymbols": [
    "__nf_conntrack_helper_register",
    "__nf_conntrack_helper_find",
    "nf_ct_helper_init",
    "nfnl_cthelper_new",
    "nfnl_cthelper_get",
    "nfnl_cthelper_del",
    "nfnl_cthelper_create",
    "nf_ct_helper",
    "nf_conntrack_broadcast_help"
  ],
  "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.",
  "WorthFuzzing": true
}

{
  "PatchDiff": "commit 99dcd6c31c7d32b78fd940a0ab0080117e42408b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jun 26 18:09:29 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h\nindex 81286c49932521..b15f37604cde4e 100644\n--- a/include/linux/netfilter/nf_conntrack_h323.h\n+++ b/include/linux/netfilter/nf_conntrack_h323.h\n@@ -9,8 +9,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n #include \u003cuapi/linux/netfilter/nf_conntrack_tuple_common.h\u003e\n \n-#define RAS_PORT 1719\n-#define Q931_PORT 1720\n #define H323_RTP_CHANNEL_MAX 4\t/* Audio, video, FAX and other */\n \n /* This structure exists only once per master */\ndiff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h\nindex c3bdb43709384d..c0b305ce7c3c6b 100644\n--- a/include/linux/netfilter/nf_conntrack_pptp.h\n+++ b/include/linux/netfilter/nf_conntrack_pptp.h\n@@ -50,8 +50,6 @@ struct nf_nat_pptp {\n \t__be16 pac_call_id;\t\t\t/* NAT'ed PAC call id */\n };\n \n-#define PPTP_CONTROL_PORT\t1723\n-\n #define PPTP_PACKET_CONTROL\t1\n #define PPTP_PACKET_MGMT\t2\n \ndiff --git a/include/linux/netfilter/nf_conntrack_sane.h b/include/linux/netfilter/nf_conntrack_sane.h\nindex 46c7acd1b4a70f..8501035d733559 100644\n--- a/include/linux/netfilter/nf_conntrack_sane.h\n+++ b/include/linux/netfilter/nf_conntrack_sane.h\n@@ -3,8 +3,6 @@\n #define _NF_CONNTRACK_SANE_H\n /* SANE tracking. */\n \n-#define SANE_PORT\t6566\n-\n enum sane_state {\n \tSANE_STATE_NORMAL,\n \tSANE_STATE_START_REQUESTED,\ndiff --git a/include/linux/netfilter/nf_conntrack_tftp.h b/include/linux/netfilter/nf_conntrack_tftp.h\nindex 90b334bbce3ce6..e3d1739c557d15 100644\n--- a/include/linux/netfilter/nf_conntrack_tftp.h\n+++ b/include/linux/netfilter/nf_conntrack_tftp.h\n@@ -2,8 +2,6 @@\n #ifndef _NF_CONNTRACK_TFTP_H\n #define _NF_CONNTRACK_TFTP_H\n \n-#define TFTP_PORT 69\n-\n #include \u003clinux/netfilter.h\u003e\n #include \u003clinux/skbuff.h\u003e\n #include \u003clinux/types.h\u003e\ndiff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h\nindex c761cd8158b253..bc5427d239f4c0 100644\n--- a/include/net/netfilter/nf_conntrack_helper.h\n+++ b/include/net/netfilter/nf_conntrack_helper.h\n@@ -43,11 +43,10 @@ struct nf_conntrack_helper {\n \n \trefcount_t ct_refcnt;\n \n-\t/* Tuple of things we will help (compared against server response) */\n-\tstruct nf_conntrack_tuple tuple;\n+\tu8 nfproto;\t/* NFPROTO_*, can be NFPROTO_UNSPEC */\n+\tu8 l4proto;\t/* IPPROTO_UDP/TCP */\n \n-\t/* Function to call when data passes; return verdict, or -1 to\n-           invalidate. */\n+\t/* Function to call when data passes; return verdict */\n \tint __rcu (*help)(struct sk_buff *skb, unsigned int protoff,\n \t\t\t  struct nf_conn *ct,\n \t\t\t  enum ip_conntrack_info conntrackinfo);\n@@ -94,8 +93,7 @@ struct nf_conntrack_helper *nf_conntrack_helper_try_module_get(const char *name,\n void nf_conntrack_helper_put(struct nf_conntrack_helper *helper);\n \n void nf_ct_helper_init(struct nf_conntrack_helper *helper,\n-\t\t       u16 l3num, u16 protonum, const char *name,\n-\t\t       u16 default_port, u16 spec_port, u32 id,\n+\t\t       u8 l3num, u16 protonum, const char *name,\n \t\t       const struct nf_conntrack_expect_policy *exp_pol,\n \t\t       u32 expect_class_max,\n \t\t       int (*help)(struct sk_buff *skb, unsigned int protoff,\ndiff --git a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\nindex 0ede138dfd29e7..e540b86bd15b6b 100644\n--- a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\n+++ b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c\n@@ -213,7 +213,7 @@ static int __init nf_nat_snmp_basic_init(void)\n \tRCU_INIT_POINTER(nf_nat_snmp_hook, help);\n \n \tnf_ct_helper_init(\u0026snmp_trap_helper, AF_INET, IPPROTO_UDP,\n-\t\t\t  \"snmp_trap\", SNMP_TRAP_PORT, SNMP_TRAP_PORT, SNMP_TRAP_PORT,\n+\t\t\t  \"snmp_trap\",\n \t\t\t  \u0026snmp_exp_policy, 0, help, NULL, THIS_MODULE);\n \n \terr = nf_conntrack_helper_register(\u0026snmp_trap_helper, \u0026snmp_trap_helper_ptr);\ndiff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c\nindex ddafbdfc96dc35..edced039970d48 100644\n--- a/net/netfilter/nf_conntrack_amanda.c\n+++ b/net/netfilter/nf_conntrack_amanda.c\n@@ -199,10 +199,10 @@ static int __init nf_conntrack_amanda_init(void)\n \t}\n \n \tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\n-\t\t\t  HELPER_NAME, 10080, 10080, 10080,\n+\t\t\t  HELPER_NAME,\n \t\t\t  \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\n-\t\t\t  HELPER_NAME, 10080, 10080, 10080,\n+\t\t\t  HELPER_NAME,\n \t\t\t  \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\n \n \tret = nf_conntrack_helpers_register(amanda_helper,\ndiff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c\nindex bf78828c7549d4..6ff954f1bfb87c 100644\n--- a/net/netfilter/nf_conntrack_broadcast.c\n+++ b/net/netfilter/nf_conntrack_broadcast.c\n@@ -66,8 +66,6 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb,\n \texp-\u003etuple                = ct-\u003etuplehash[IP_CT_DIR_REPLY].tuple;\n \n \thelper = rcu_dereference(help-\u003ehelper);\n-\tif (helper)\n-\t\texp-\u003etuple.src.u.udp.port = helper-\u003etuple.src.u.udp.port;\n \n \texp-\u003emask.src.u3.ip       = mask;\n \texp-\u003emask.src.u.udp.port  = htons(0xFFFF);\ndiff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c\nindex 0847f845613d6a..f3944598c1726f 100644\n--- a/net/netfilter/nf_conntrack_ftp.c\n+++ b/net/netfilter/nf_conntrack_ftp.c\n@@ -35,11 +35,6 @@ MODULE_ALIAS(\"ip_conntrack_ftp\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n static DEFINE_SPINLOCK(nf_ftp_lock);\n \n-#define MAX_PORTS 8\n-static u_int16_t ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-\n static bool loose;\n module_param(loose, bool, 0600);\n \n@@ -560,8 +555,8 @@ static int nf_ct_ftp_from_nlattr(struct nlattr *attr, struct nf_conn *ct)\n \treturn 0;\n }\n \n-static struct nf_conntrack_helper ftp[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper *ftp_ptr[MAX_PORTS * 2] __read_mostly;\n+static struct nf_conntrack_helper ftp __read_mostly;\n+static struct nf_conntrack_helper *ftp_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy ftp_exp_policy = {\n \t.max_expected\t= 1,\n@@ -570,32 +565,23 @@ static const struct nf_conntrack_expect_policy ftp_exp_policy = {\n \n static void __exit nf_conntrack_ftp_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(ftp_ptr, ports_c * 2);\n+\tnf_conntrack_helper_unregister(ftp_ptr);\n }\n \n static int __init nf_conntrack_ftp_init(void)\n {\n-\tint i, ret = 0;\n+\tint ret = 0;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_ftp_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = FTP_PORT;\n-\n \t/* FIXME should be configurable whether IPv4 and IPv6 FTP connections\n \t\t are tracked or not - YK */\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026ftp[2 * i], AF_INET, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, FTP_PORT, ports[i], ports[i],\n-\t\t\t\t  \u0026ftp_exp_policy, 0, help,\n-\t\t\t\t  nf_ct_ftp_from_nlattr, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026ftp[2 * i + 1], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, FTP_PORT, ports[i], ports[i],\n-\t\t\t\t  \u0026ftp_exp_policy, 0, help,\n-\t\t\t\t  nf_ct_ftp_from_nlattr, THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026ftp, NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t  HELPER_NAME,\n+\t\t\t  \u0026ftp_exp_policy, 0, help,\n+\t\t\t  nf_ct_ftp_from_nlattr, THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(ftp, ports_c * 2, ftp_ptr);\n+\tret = nf_conntrack_helper_register(\u0026ftp, \u0026ftp_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c\nindex 24931e379985bb..98b9753d5e65e1 100644\n--- a/net/netfilter/nf_conntrack_h323_main.c\n+++ b/net/netfilter/nf_conntrack_h323_main.c\n@@ -1713,19 +1713,19 @@ static int __init h323_helper_init(void)\n \tint ret;\n \n \tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP,\n-\t\t\t  \"RAS\", RAS_PORT, RAS_PORT, RAS_PORT,\n+\t\t\t  \"RAS\",\n \t\t\t  \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP,\n-\t\t\t  \"RAS\", RAS_PORT, RAS_PORT, RAS_PORT,\n+\t\t\t  \"RAS\",\n \t\t\t  \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP,\n-\t\t\t  \"H.245\", 0, 0, 0,\n+\t\t\t  \"H.245\",\n \t\t\t  \u0026h245_exp_policy, 0, h245_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP,\n-\t\t\t  \"Q.931\", Q931_PORT, Q931_PORT, Q931_PORT,\n+\t\t\t  \"Q.931\",\n \t\t\t  \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\n \tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP,\n-\t\t\t  \"Q.931\", Q931_PORT, Q931_PORT, Q931_PORT,\n+\t\t\t  \"Q.931\",\n \t\t\t  \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\n \n \tret = nf_conntrack_helper_register(\u0026nf_conntrack_helper_h245,\ndiff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c\nindex 500509b17663ed..506c5803476155 100644\n--- a/net/netfilter/nf_conntrack_helper.c\n+++ b/net/netfilter/nf_conntrack_helper.c\n@@ -40,12 +40,16 @@ static unsigned int nf_ct_helper_count __read_mostly;\n static DEFINE_MUTEX(nf_ct_nat_helpers_mutex);\n static struct list_head nf_ct_nat_helpers __read_mostly;\n \n-/* Stupid hash, but collision free for the default registrations of the\n- * helpers currently in the kernel. */\n-static unsigned int helper_hash(const struct nf_conntrack_tuple *tuple)\n+static unsigned int helper_hash(const char *name, u8 protonum)\n {\n-\treturn (((tuple-\u003esrc.l3num \u003c\u003c 8) | tuple-\u003edst.protonum) ^\n-\t\t(__force __u16)tuple-\u003esrc.u.all) % nf_ct_helper_hsize;\n+\tstatic u32 seed;\n+\tu32 initval;\n+\n+\tget_random_once(\u0026seed, sizeof(seed));\n+\n+\tinitval = seed ^ protonum;\n+\n+\treturn jhash(name, strlen(name), initval) % nf_ct_helper_hsize;\n }\n \n struct nf_conntrack_helper *\n@@ -54,18 +58,18 @@ __nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum)\n \tstruct nf_conntrack_helper *h;\n \tunsigned int i;\n \n-\tfor (i = 0; i \u003c nf_ct_helper_hsize; i++) {\n-\t\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\n-\t\t\tif (strcmp(h-\u003ename, name))\n-\t\t\t\tcontinue;\n+\tif (!nf_ct_helper_hash)\n+\t\treturn NULL;\n \n-\t\t\tif (h-\u003etuple.src.l3num != NFPROTO_UNSPEC \u0026\u0026\n-\t\t\t    h-\u003etuple.src.l3num != l3num)\n-\t\t\t\tcontinue;\n+\ti = helper_hash(name, protonum);\n \n-\t\t\tif (h-\u003etuple.dst.protonum == protonum)\n-\t\t\t\treturn h;\n-\t\t}\n+\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\n+\t\tif (strcmp(h-\u003ename, name))\n+\t\t\tcontinue;\n+\t\tif (h-\u003enfproto != NFPROTO_UNSPEC \u0026\u0026 h-\u003enfproto != l3num)\n+\t\t\tcontinue;\n+\t\tif (h-\u003el4proto == protonum)\n+\t\t\treturn h;\n \t}\n \treturn NULL;\n }\n@@ -363,9 +367,8 @@ EXPORT_SYMBOL_GPL(nf_ct_helper_log);\n \n int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)\n {\n-\tstruct nf_conntrack_tuple_mask mask = { .src.u.all = htons(0xFFFF) };\n-\tunsigned int h = helper_hash(\u0026me-\u003etuple);\n \tstruct nf_conntrack_helper *cur;\n+\tunsigned int h;\n \tint ret = 0, i;\n \n \tBUG_ON(me-\u003eexpect_class_max \u003e= NF_CT_MAX_EXPECT_CLASSES);\n@@ -382,29 +385,18 @@ int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)\n \t\t\treturn -EINVAL;\n \t}\n \n+\th = helper_hash(me-\u003ename, me-\u003el4proto);\n \tmutex_lock(\u0026nf_ct_helper_mutex);\n-\tfor (i = 0; i \u003c nf_ct_helper_hsize; i++) {\n-\t\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[i], hnode) {\n-\t\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n-\t\t\t    (cur-\u003etuple.src.l3num == NFPROTO_UNSPEC ||\n-\t\t\t     cur-\u003etuple.src.l3num == me-\u003etuple.src.l3num) \u0026\u0026\n-\t\t\t    cur-\u003etuple.dst.protonum == me-\u003etuple.dst.protonum) {\n-\t\t\t\tret = -EBUSY;\n-\t\t\t\tgoto out;\n-\t\t\t}\n+\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\n+\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n+\t\t    (cur-\u003enfproto == NFPROTO_UNSPEC ||\n+\t\t     cur-\u003enfproto == me-\u003enfproto) \u0026\u0026\n+\t\t    cur-\u003el4proto == me-\u003el4proto) {\n+\t\t\tret = -EBUSY;\n+\t\t\tgoto out;\n \t\t}\n \t}\n \n-\t/* avoid unpredictable behaviour for auto_assign_helper */\n-\tif (!(me-\u003eflags \u0026 NF_CT_HELPER_F_USERSPACE)) {\n-\t\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\n-\t\t\tif (nf_ct_tuple_src_mask_cmp(\u0026cur-\u003etuple, \u0026me-\u003etuple,\n-\t\t\t\t\t\t     \u0026mask)) {\n-\t\t\t\tret = -EBUSY;\n-\t\t\t\tgoto out;\n-\t\t\t}\n-\t\t}\n-\t}\n \trefcount_set(\u0026me-\u003ect_refcnt, 1);\n \thlist_add_head_rcu(\u0026me-\u003ehnode, \u0026nf_ct_helper_hash[h]);\n \tnf_ct_helper_count++;\n@@ -479,8 +471,7 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)\n EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);\n \n void nf_ct_helper_init(struct nf_conntrack_helper *helper,\n-\t\t       u16 l3num, u16 protonum, const char *name,\n-\t\t       u16 default_port, u16 spec_port, u32 id,\n+\t\t       u8 l3num, u16 protonum, const char *name,\n \t\t       const struct nf_conntrack_expect_policy *exp_pol,\n \t\t       u32 expect_class_max,\n \t\t       int (*help)(struct sk_buff *skb, unsigned int protoff,\n@@ -492,9 +483,8 @@ void nf_ct_helper_init(struct nf_conntrack_helper *helper,\n {\n \tmemset(helper, 0, sizeof(*helper));\n \n-\thelper-\u003etuple.src.l3num = l3num;\n-\thelper-\u003etuple.dst.protonum = protonum;\n-\thelper-\u003etuple.src.u.all = htons(spec_port);\n+\thelper-\u003enfproto = l3num;\n+\thelper-\u003el4proto = protonum;\n \n \trcu_assign_pointer(helper-\u003ehelp, help);\n \thelper-\u003efrom_nlattr = from_nlattr;\n@@ -502,10 +492,7 @@ void nf_ct_helper_init(struct nf_conntrack_helper *helper,\n \tsnprintf(helper-\u003enat_mod_name, sizeof(helper-\u003enat_mod_name),\n \t\t NF_NAT_HELPER_PREFIX \"%s\", name);\n \n-\tif (spec_port == default_port)\n-\t\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s\", name);\n-\telse\n-\t\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s-%u\", name, id);\n+\tsnprintf(helper-\u003ename, sizeof(helper-\u003ename), \"%s\", name);\n \n \tif (WARN_ON_ONCE(expect_class_max \u003e= NF_CT_MAX_EXPECT_CLASSES))\n \t\treturn;\ndiff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c\nindex 193ab34db795f9..4e6bafe4143752 100644\n--- a/net/netfilter/nf_conntrack_irc.c\n+++ b/net/netfilter/nf_conntrack_irc.c\n@@ -21,9 +21,6 @@\n #include \u003cnet/netfilter/nf_conntrack_helper.h\u003e\n #include \u003clinux/netfilter/nf_conntrack_irc.h\u003e\n \n-#define MAX_PORTS 8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n static unsigned int max_dcc_channels = 8;\n static unsigned int dcc_timeout __read_mostly = 300;\n /* This is slow, but it's simple. --RR */\n@@ -42,8 +39,6 @@ MODULE_LICENSE(\"GPL\");\n MODULE_ALIAS(\"ip_conntrack_irc\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"port numbers of IRC servers\");\n module_param(max_dcc_channels, uint, 0400);\n MODULE_PARM_DESC(max_dcc_channels, \"max number of expected DCC channels per \"\n \t\t\t\t   \"IRC session\");\n@@ -254,13 +249,13 @@ static int help(struct sk_buff *skb, unsigned int protoff,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper irc[MAX_PORTS] __read_mostly;\n-static struct nf_conntrack_helper *irc_ptr[MAX_PORTS] __read_mostly;\n+static struct nf_conntrack_helper irc __read_mostly;\n+static struct nf_conntrack_helper *irc_ptr __read_mostly;\n static struct nf_conntrack_expect_policy irc_exp_policy;\n \n static int __init nf_conntrack_irc_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tnf_conntrack_helper_deprecated(HELPER_NAME);\n \n@@ -282,17 +277,11 @@ static int __init nf_conntrack_irc_init(void)\n \tif (!irc_buffer)\n \t\treturn -ENOMEM;\n \n-\t/* If no port given, default to standard irc port */\n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = IRC_PORT;\n+\tnf_ct_helper_init(\u0026irc, AF_INET, IPPROTO_TCP, HELPER_NAME,\n+\t\t\t  \u0026irc_exp_policy,\n+\t\t\t  0, help, NULL, THIS_MODULE);\n \n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026irc[i], AF_INET, IPPROTO_TCP, HELPER_NAME,\n-\t\t\t\t  IRC_PORT, ports[i], i, \u0026irc_exp_policy,\n-\t\t\t\t  0, help, NULL, THIS_MODULE);\n-\t}\n-\n-\tret = nf_conntrack_helpers_register(\u0026irc[0], ports_c, irc_ptr);\n+\tret = nf_conntrack_helper_register(\u0026irc, \u0026irc_ptr);\n \tif (ret) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\tkfree(irc_buffer);\n@@ -304,7 +293,7 @@ static int __init nf_conntrack_irc_init(void)\n \n static void __exit nf_conntrack_irc_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(irc_ptr, ports_c);\n+\tnf_conntrack_helper_unregister(irc_ptr);\n \tkfree(irc_buffer);\n }\n \ndiff --git a/net/netfilter/nf_conntrack_netbios_ns.c b/net/netfilter/nf_conntrack_netbios_ns.c\nindex 89d1cf7d6512e7..caa2b101fa9e5e 100644\n--- a/net/netfilter/nf_conntrack_netbios_ns.c\n+++ b/net/netfilter/nf_conntrack_netbios_ns.c\n@@ -21,7 +21,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n \n #define HELPER_NAME\t\"netbios-ns\"\n-#define NMBD_PORT\t137\n \n MODULE_AUTHOR(\"Patrick McHardy \u003ckaber@trash.net\u003e\");\n MODULE_DESCRIPTION(\"NetBIOS name service broadcast connection tracking helper\");\n@@ -54,7 +53,6 @@ static int __init nf_conntrack_netbios_ns_init(void)\n \texp_policy.timeout = timeout;\n \n \tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP, HELPER_NAME,\n-\t\t\t  NMBD_PORT, NMBD_PORT, NMBD_PORT,\n \t\t\t  \u0026exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE);\n \n \treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\ndiff --git a/net/netfilter/nf_conntrack_ovs.c b/net/netfilter/nf_conntrack_ovs.c\nindex 49d1511e992185..b4085af3ad1ce0 100644\n--- a/net/netfilter/nf_conntrack_ovs.c\n+++ b/net/netfilter/nf_conntrack_ovs.c\n@@ -31,8 +31,8 @@ int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,\n \tif (!helper)\n \t\treturn NF_ACCEPT;\n \n-\tif (helper-\u003etuple.src.l3num != NFPROTO_UNSPEC \u0026\u0026\n-\t    helper-\u003etuple.src.l3num != proto)\n+\tif (helper-\u003enfproto != NFPROTO_UNSPEC \u0026\u0026\n+\t    helper-\u003enfproto != proto)\n \t\treturn NF_ACCEPT;\n \n \tswitch (proto) {\n@@ -60,7 +60,7 @@ int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,\n \t\treturn NF_DROP;\n \t}\n \n-\tif (helper-\u003etuple.dst.protonum != proto)\n+\tif (helper-\u003el4proto != proto)\n \t\treturn NF_ACCEPT;\n \n \thelper_cb = rcu_dereference(helper-\u003ehelp);\ndiff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c\nindex 80fc14c87ddc4b..cbf32a3cb1f612 100644\n--- a/net/netfilter/nf_conntrack_pptp.c\n+++ b/net/netfilter/nf_conntrack_pptp.c\n@@ -540,7 +540,7 @@ static int __init nf_conntrack_pptp_init(void)\n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_pptp_master));\n \n \tnf_ct_helper_init(\u0026pptp, AF_INET, IPPROTO_TCP,\n-\t\t\t  \"pptp\", PPTP_CONTROL_PORT, PPTP_CONTROL_PORT, PPTP_CONTROL_PORT,\n+\t\t\t  \"pptp\",\n \t\t\t  \u0026pptp_exp_policy, 0, conntrack_pptp_help, NULL, THIS_MODULE);\n \n \tpptp.destroy = gre_pptp_destroy_siblings;\ndiff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c\nindex 39085acf7a7185..a0658f69d78fbb 100644\n--- a/net/netfilter/nf_conntrack_sane.c\n+++ b/net/netfilter/nf_conntrack_sane.c\n@@ -34,11 +34,6 @@ MODULE_AUTHOR(\"Michal Schmidt \u003cmschmidt@redhat.com\u003e\");\n MODULE_DESCRIPTION(\"SANE connection tracking helper\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS 8\n-static u_int16_t ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-\n struct sane_request {\n \t__be32 RPC_code;\n #define SANE_NET_START      7   /* RPC code */\n@@ -169,8 +164,8 @@ static int help(struct sk_buff *skb,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper sane[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper *sane_ptr[MAX_PORTS * 2] __read_mostly;\n+static struct nf_conntrack_helper sane __read_mostly;\n+static struct nf_conntrack_helper *sane_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy sane_exp_policy = {\n \t.max_expected\t= 1,\n@@ -179,32 +174,21 @@ static const struct nf_conntrack_expect_policy sane_exp_policy = {\n \n static void __exit nf_conntrack_sane_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(sane_ptr, ports_c * 2);\n+\tnf_conntrack_helper_unregister(sane_ptr);\n }\n \n static int __init nf_conntrack_sane_init(void)\n {\n-\tint i, ret = 0;\n+\tint ret = 0;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sane_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = SANE_PORT;\n-\n-\t/* FIXME should be configurable whether IPv4 and IPv6 connections\n-\t\t are tracked or not - YK */\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026sane[2 * i], AF_INET, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, SANE_PORT, ports[i], ports[i],\n-\t\t\t\t  \u0026sane_exp_policy, 0, help, NULL,\n-\t\t\t\t  THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sane[2 * i + 1], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, SANE_PORT, ports[i], ports[i],\n-\t\t\t\t  \u0026sane_exp_policy, 0, help, NULL,\n-\t\t\t\t  THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026sane, NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t  HELPER_NAME,\n+\t\t\t  \u0026sane_exp_policy, 0, help, NULL,\n+\t\t\t  THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(sane, ports_c * 2, sane_ptr);\n+\tret = nf_conntrack_helper_register(\u0026sane, \u0026sane_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c\nindex 5ec3a4a4bbd707..d0b85b8ad1e6d8 100644\n--- a/net/netfilter/nf_conntrack_sip.c\n+++ b/net/netfilter/nf_conntrack_sip.c\n@@ -35,12 +35,6 @@ MODULE_DESCRIPTION(\"SIP connection tracking helper\");\n MODULE_ALIAS(\"ip_conntrack_sip\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS\t8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"port numbers of SIP servers\");\n-\n static unsigned int sip_timeout __read_mostly = SIP_TIMEOUT;\n module_param(sip_timeout, uint, 0600);\n MODULE_PARM_DESC(sip_timeout, \"timeout for the master SIP session\");\n@@ -1764,8 +1758,8 @@ static int sip_help_udp(struct sk_buff *skb, unsigned int protoff,\n \treturn process_sip_msg(skb, ct, protoff, dataoff, \u0026dptr, \u0026datalen);\n }\n \n-static struct nf_conntrack_helper sip[MAX_PORTS * 4] __read_mostly;\n-static struct nf_conntrack_helper *sip_ptr[MAX_PORTS * 4] __read_mostly;\n+static struct nf_conntrack_helper sip[2] __read_mostly;\n+static struct nf_conntrack_helper *sip_ptr[2] __read_mostly;\n \n static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1] = {\n \t[SIP_EXPECT_SIGNALLING] = {\n@@ -1792,38 +1786,25 @@ static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1\n \n static void __exit nf_conntrack_sip_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(sip_ptr, ports_c * 4);\n+\tnf_conntrack_helpers_unregister(sip_ptr, 2);\n }\n \n static int __init nf_conntrack_sip_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sip_master));\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = SIP_PORT;\n-\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026sip[4 * i], AF_INET, IPPROTO_UDP,\n-\t\t\t\t  HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n-\t\t\t\t  NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 1], AF_INET, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n-\t\t\t\t  NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 2], AF_INET6, IPPROTO_UDP,\n-\t\t\t\t  HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n-\t\t\t\t  NULL, THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026sip[4 * i + 3], AF_INET6, IPPROTO_TCP,\n-\t\t\t\t  HELPER_NAME, SIP_PORT, ports[i], i,\n-\t\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n-\t\t\t\t  NULL, THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026sip[0], NFPROTO_UNSPEC, IPPROTO_UDP,\n+\t\t\t  HELPER_NAME,\n+\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,\n+\t\t\t  NULL, THIS_MODULE);\n+\tnf_ct_helper_init(\u0026sip[1], NFPROTO_UNSPEC, IPPROTO_TCP,\n+\t\t\t  HELPER_NAME,\n+\t\t\t  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,\n+\t\t\t  NULL, THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(sip, ports_c * 4, sip_ptr);\n+\tret = nf_conntrack_helpers_register(sip, 2, sip_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nf_conntrack_snmp.c b/net/netfilter/nf_conntrack_snmp.c\nindex b6fce5703fce77..109986d5d55e69 100644\n--- a/net/netfilter/nf_conntrack_snmp.c\n+++ b/net/netfilter/nf_conntrack_snmp.c\n@@ -14,8 +14,6 @@\n #include \u003cnet/netfilter/nf_conntrack_expect.h\u003e\n #include \u003clinux/netfilter/nf_conntrack_snmp.h\u003e\n \n-#define SNMP_PORT\t161\n-\n MODULE_AUTHOR(\"Jiri Olsa \u003cjolsa@redhat.com\u003e\");\n MODULE_DESCRIPTION(\"SNMP service broadcast connection tracking helper\");\n MODULE_LICENSE(\"GPL\");\n@@ -55,7 +53,7 @@ static int __init nf_conntrack_snmp_init(void)\n \texp_policy.timeout = timeout;\n \n \tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP,\n-\t\t\t  \"snmp\", SNMP_PORT, SNMP_PORT, SNMP_PORT,\n+\t\t\t  \"snmp\",\n \t\t\t  \u0026exp_policy, 0, snmp_conntrack_help, NULL,\n \t\t\t  THIS_MODULE);\n \ndiff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c\nindex 4393c435aa3549..a69559edf9b363 100644\n--- a/net/netfilter/nf_conntrack_tftp.c\n+++ b/net/netfilter/nf_conntrack_tftp.c\n@@ -26,12 +26,6 @@ MODULE_LICENSE(\"GPL\");\n MODULE_ALIAS(\"ip_conntrack_tftp\");\n MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);\n \n-#define MAX_PORTS 8\n-static unsigned short ports[MAX_PORTS];\n-static unsigned int ports_c;\n-module_param_array(ports, ushort, \u0026ports_c, 0400);\n-MODULE_PARM_DESC(ports, \"Port numbers of TFTP servers\");\n-\n nf_nat_tftp_hook_fn __rcu *nf_nat_tftp_hook __read_mostly;\n EXPORT_SYMBOL_GPL(nf_nat_tftp_hook);\n \n@@ -95,8 +89,8 @@ static int tftp_help(struct sk_buff *skb,\n \treturn ret;\n }\n \n-static struct nf_conntrack_helper tftp[MAX_PORTS * 2] __read_mostly;\n-static struct nf_conntrack_helper *tftp_ptr[MAX_PORTS * 2] __read_mostly;\n+static struct nf_conntrack_helper tftp __read_mostly;\n+static struct nf_conntrack_helper *tftp_ptr __read_mostly;\n \n static const struct nf_conntrack_expect_policy tftp_exp_policy = {\n \t.max_expected\t= 1,\n@@ -105,30 +99,21 @@ static const struct nf_conntrack_expect_policy tftp_exp_policy = {\n \n static void __exit nf_conntrack_tftp_fini(void)\n {\n-\tnf_conntrack_helpers_unregister(tftp_ptr, ports_c * 2);\n+\tnf_conntrack_helper_unregister(tftp_ptr);\n }\n \n static int __init nf_conntrack_tftp_init(void)\n {\n-\tint i, ret;\n+\tint ret;\n \n \tNF_CT_HELPER_BUILD_BUG_ON(0);\n \n-\tif (ports_c == 0)\n-\t\tports[ports_c++] = TFTP_PORT;\n-\n-\tfor (i = 0; i \u003c ports_c; i++) {\n-\t\tnf_ct_helper_init(\u0026tftp[2 * i], AF_INET, IPPROTO_UDP,\n-\t\t\t\t  HELPER_NAME, TFTP_PORT, ports[i], i,\n-\t\t\t\t  \u0026tftp_exp_policy, 0, tftp_help, NULL,\n-\t\t\t\t  THIS_MODULE);\n-\t\tnf_ct_helper_init(\u0026tftp[2 * i + 1], AF_INET6, IPPROTO_UDP,\n-\t\t\t\t  HELPER_NAME, TFTP_PORT, ports[i], i,\n-\t\t\t\t  \u0026tftp_exp_policy, 0, tftp_help, NULL,\n-\t\t\t\t  THIS_MODULE);\n-\t}\n+\tnf_ct_helper_init(\u0026tftp, NFPROTO_UNSPEC, IPPROTO_UDP,\n+\t\t\t  HELPER_NAME,\n+\t\t\t  \u0026tftp_exp_policy, 0, tftp_help, NULL,\n+\t\t\t  THIS_MODULE);\n \n-\tret = nf_conntrack_helpers_register(tftp, ports_c * 2, tftp_ptr);\n+\tret = nf_conntrack_helper_register(\u0026tftp, \u0026tftp_ptr);\n \tif (ret \u003c 0) {\n \t\tpr_err(\"failed to register helpers\\n\");\n \t\treturn ret;\ndiff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c\nindex f1460b683d7af7..56655cb7fe2ad0 100644\n--- a/net/netfilter/nfnetlink_cthelper.c\n+++ b/net/netfilter/nfnetlink_cthelper.c\n@@ -67,7 +67,7 @@ nfnl_userspace_cthelper(struct sk_buff *skb, unsigned int protoff,\n }\n \n static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = {\n-\t[NFCTH_TUPLE_L3PROTONUM] = { .type = NLA_U16, },\n+\t[NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6),\n \t[NFCTH_TUPLE_L4PROTONUM] = { .type = NLA_U8, },\n };\n \n@@ -254,7 +254,8 @@ nfnl_cthelper_create(const struct nlattr * const tb[],\n \thelper-\u003edata_len = size;\n \n \thelper-\u003eflags |= NF_CT_HELPER_F_USERSPACE;\n-\tmemcpy(\u0026helper-\u003etuple, tuple, sizeof(struct nf_conntrack_tuple));\n+\thelper-\u003enfproto = tuple-\u003esrc.l3num;\n+\thelper-\u003el4proto = tuple-\u003edst.protonum;\n \n \thelper-\u003eme = THIS_MODULE;\n \thelper-\u003ehelp = nfnl_userspace_cthelper;\n@@ -449,8 +450,8 @@ static int nfnl_cthelper_new(struct sk_buff *skb, const struct nfnl_info *info,\n \t\tif (strncmp(cur-\u003ename, helper_name, NF_CT_HELPER_NAME_LEN))\n \t\t\tcontinue;\n \n-\t\tif ((tuple.src.l3num != cur-\u003etuple.src.l3num ||\n-\t\t     tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\tif ((tuple.src.l3num != cur-\u003enfproto ||\n+\t\t     tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tif (info-\u003enlh-\u003enlmsg_flags \u0026 NLM_F_EXCL)\n@@ -479,10 +480,10 @@ nfnl_cthelper_dump_tuple(struct sk_buff *skb,\n \t\tgoto nla_put_failure;\n \n \tif (nla_put_be16(skb, NFCTH_TUPLE_L3PROTONUM,\n-\t\t\t htons(helper-\u003etuple.src.l3num)))\n+\t\t\t htons(helper-\u003enfproto)))\n \t\tgoto nla_put_failure;\n \n-\tif (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper-\u003etuple.dst.protonum))\n+\tif (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper-\u003el4proto))\n \t\tgoto nla_put_failure;\n \n \tnla_nest_end(skb, nest_parms);\n@@ -661,8 +662,8 @@ static int nfnl_cthelper_get(struct sk_buff *skb, const struct nfnl_info *info,\n \t\t\tcontinue;\n \n \t\tif (tuple_set \u0026\u0026\n-\t\t    (tuple.src.l3num != cur-\u003etuple.src.l3num ||\n-\t\t     tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\t    (tuple.src.l3num != cur-\u003enfproto ||\n+\t\t     tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tskb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);\n@@ -721,8 +722,8 @@ static int nfnl_cthelper_del(struct sk_buff *skb, const struct nfnl_info *info,\n \t\t\tcontinue;\n \n \t\tif (tuple_set \u0026\u0026\n-\t\t    (tuple.src.l3num != cur-\u003etuple.src.l3num ||\n-\t\t     tuple.dst.protonum != cur-\u003etuple.dst.protonum))\n+\t\t    (tuple.src.l3num != cur-\u003enfproto ||\n+\t\t     tuple.dst.protonum != cur-\u003el4proto))\n \t\t\tcontinue;\n \n \t\tfound = true;\n"
}

gemini-3.1-pro-preview

{
  "EnableConfigs": [
    "NF_CONNTRACK",
    "NF_CT_NETLINK",
    "NETFILTER_NETLINK_QUEUE",
    "NETFILTER_NETLINK_GLUE_CT",
    "NETFILTER_ADVANCED",
    "NF_CT_NETLINK_HELPER",
    "NF_CONNTRACK_AMANDA",
    "NF_CONNTRACK_FTP",
    "NF_CONNTRACK_H323",
    "NF_CONNTRACK_IRC",
    "NF_CONNTRACK_NETBIOS_NS",
    "NF_CONNTRACK_PPTP",
    "NF_CONNTRACK_SANE",
    "NF_CONNTRACK_SIP",
    "NF_CONNTRACK_TFTP",
    "NF_CONNTRACK_SNMP",
    "NF_NAT",
    "NF_NAT_SNMP_BASIC",
    "OPENVSWITCH",
    "NET_ACT_CT"
  ],
  "FocusSymbols": [
    "__nf_conntrack_helper_register",
    "__nf_conntrack_helper_find",
    "nf_ct_helper_init",
    "nfnl_cthelper_new",
    "nfnl_cthelper_get",
    "nfnl_cthelper_del",
    "nfnl_cthelper_create",
    "nf_ct_helper",
    "nf_conntrack_broadcast_help"
  ],
  "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.",
  "WorthFuzzing": true
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. List them in the EnableConfigs output array,
   and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit 99dcd6c31c7d32b78fd940a0ab0080117e42408b
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jun 26 18:09:29 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h
index 81286c49932521..b15f37604cde4e 100644
--- a/include/linux/netfilter/nf_conntrack_h323.h
+++ b/include/linux/netfilter/nf_conntrack_h323.h
@@ -9,8 +9,6 @@
 #include <net/netfilter/nf_conntrack_expect.h>
 #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h>
 
-#define RAS_PORT 1719
-#define Q931_PORT 1720
 #define H323_RTP_CHANNEL_MAX 4	/* Audio, video, FAX and other */
 
 /* This structure exists only once per master */
diff --git a/include/linux/netfilter/nf_conntrack_pptp.h b/include/linux/netfilter/nf_conntrack_pptp.h
index c3bdb43709384d..c0b305ce7c3c6b 100644
--- a/include/linux/netfilter/nf_conntrack_pptp.h
+++ b/include/linux/netfilter/nf_conntrack_pptp.h
@@ -50,8 +50,6 @@ struct nf_nat_pptp {
 	__be16 pac_call_id;			/* NAT'ed PAC call id */
 };
 
-#define PPTP_CONTROL_PORT	1723
-
 #define PPTP_PACKET_CONTROL	1
 #define PPTP_PACKET_MGMT	2
 
diff --git a/include/linux/netfilter/nf_conntrack_sane.h b/include/linux/netfilter/nf_conntrack_sane.h
index 46c7acd1b4a70f..8501035d733559 100644
--- a/include/linux/netfilter/nf_conntrack_sane.h
+++ b/include/linux/netfilter/nf_conntrack_sane.h
@@ -3,8 +3,6 @@
 #define _NF_CONNTRACK_SANE_H
 /* SANE tracking. */
 
-#define SANE_PORT	6566
-
 enum sane_state {
 	SANE_STATE_NORMAL,
 	SANE_STATE_START_REQUESTED,
diff --git a/include/linux/netfilter/nf_conntrack_tftp.h b/include/linux/netfilter/nf_conntrack_tftp.h
index 90b334bbce3ce6..e3d1739c557d15 100644
--- a/include/linux/netfilter/nf_conntrack_tftp.h
+++ b/include/linux/netfilter/nf_conntrack_tftp.h
@@ -2,8 +2,6 @@
 #ifndef _NF_CONNTRACK_TFTP_H
 #define _NF_CONNTRACK_TFTP_H
 
-#define TFTP_PORT 69
-
 #include <linux/netfilter.h>
 #include <linux/skbuff.h>
 #include <linux/types.h>
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
index c761cd8158b253..bc5427d239f4c0 100644
--- a/include/net/netfilter/nf_conntrack_helper.h
+++ b/include/net/netfilter/nf_conntrack_helper.h
@@ -43,11 +43,10 @@ struct nf_conntrack_helper {
 
 	refcount_t ct_refcnt;
 
-	/* Tuple of things we will help (compared against server response) */
-	struct nf_conntrack_tuple tuple;
+	u8 nfproto;	/* NFPROTO_*, can be NFPROTO_UNSPEC */
+	u8 l4proto;	/* IPPROTO_UDP/TCP */
 
-	/* Function to call when data passes; return verdict, or -1 to
-           invalidate. */
+	/* Function to call when data passes; return verdict */
 	int __rcu (*help)(struct sk_buff *skb, unsigned int protoff,
 			  struct nf_conn *ct,
 			  enum ip_conntrack_info conntrackinfo);
@@ -94,8 +93,7 @@ struct nf_conntrack_helper *nf_conntrack_helper_try_module_get(const char *name,
 void nf_conntrack_helper_put(struct nf_conntrack_helper *helper);
 
 void nf_ct_helper_init(struct nf_conntrack_helper *helper,
-		       u16 l3num, u16 protonum, const char *name,
-		       u16 default_port, u16 spec_port, u32 id,
+		       u8 l3num, u16 protonum, const char *name,
 		       const struct nf_conntrack_expect_policy *exp_pol,
 		       u32 expect_class_max,
 		       int (*help)(struct sk_buff *skb, unsigned int protoff,
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c
index 0ede138dfd29e7..e540b86bd15b6b 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic_main.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic_main.c
@@ -213,7 +213,7 @@ static int __init nf_nat_snmp_basic_init(void)
 	RCU_INIT_POINTER(nf_nat_snmp_hook, help);
 
 	nf_ct_helper_init(&snmp_trap_helper, AF_INET, IPPROTO_UDP,
-			  "snmp_trap", SNMP_TRAP_PORT, SNMP_TRAP_PORT, SNMP_TRAP_PORT,
+			  "snmp_trap",
 			  &snmp_exp_policy, 0, help, NULL, THIS_MODULE);
 
 	err = nf_conntrack_helper_register(&snmp_trap_helper, &snmp_trap_helper_ptr);
diff --git a/net/netfilter/nf_conntrack_amanda.c b/net/netfilter/nf_conntrack_amanda.c
index ddafbdfc96dc35..edced039970d48 100644
--- a/net/netfilter/nf_conntrack_amanda.c
+++ b/net/netfilter/nf_conntrack_amanda.c
@@ -199,10 +199,10 @@ static int __init nf_conntrack_amanda_init(void)
 	}
 
 	nf_ct_helper_init(&amanda_helper[0], AF_INET, IPPROTO_UDP,
-			  HELPER_NAME, 10080, 10080, 10080,
+			  HELPER_NAME,
 			  &amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);
 	nf_ct_helper_init(&amanda_helper[1], AF_INET6, IPPROTO_UDP,
-			  HELPER_NAME, 10080, 10080, 10080,
+			  HELPER_NAME,
 			  &amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);
 
 	ret = nf_conntrack_helpers_register(amanda_helper,
diff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c
index bf78828c7549d4..6ff954f1bfb87c 100644
--- a/net/netfilter/nf_conntrack_broadcast.c
+++ b/net/netfilter/nf_conntrack_broadcast.c
@@ -66,8 +66,6 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb,
 	exp->tuple                = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
 
 	helper = rcu_dereference(help->helper);
-	if (helper)
-		exp->tuple.src.u.udp.port = helper->tuple.src.u.udp.port;
 
 	exp->mask.src.u3.ip       = mask;
 	exp->mask.src.u.udp.port  = htons(0xFFFF);
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 0847f845613d6a..f3944598c1726f 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -35,11 +35,6 @@ MODULE_ALIAS("ip_conntrack_ftp");
 MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);
 static DEFINE_SPINLOCK(nf_ftp_lock);
 
-#define MAX_PORTS 8
-static u_int16_t ports[MAX_PORTS];
-static unsigned int ports_c;
-module_param_array(ports, ushort, &ports_c, 0400);
-
 static bool loose;
 module_param(loose, bool, 0600);
 
@@ -560,8 +555,8 @@ static int nf_ct_ftp_from_nlattr(struct nlattr *attr, struct nf_conn *ct)
 	return 0;
 }
 
-static struct nf_conntrack_helper ftp[MAX_PORTS * 2] __read_mostly;
-static struct nf_conntrack_helper *ftp_ptr[MAX_PORTS * 2] __read_mostly;
+static struct nf_conntrack_helper ftp __read_mostly;
+static struct nf_conntrack_helper *ftp_ptr __read_mostly;
 
 static const struct nf_conntrack_expect_policy ftp_exp_policy = {
 	.max_expected	= 1,
@@ -570,32 +565,23 @@ static const struct nf_conntrack_expect_policy ftp_exp_policy = {
 
 static void __exit nf_conntrack_ftp_fini(void)
 {
-	nf_conntrack_helpers_unregister(ftp_ptr, ports_c * 2);
+	nf_conntrack_helper_unregister(ftp_ptr);
 }
 
 static int __init nf_conntrack_ftp_init(void)
 {
-	int i, ret = 0;
+	int ret = 0;
 
 	NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_ftp_master));
 
-	if (ports_c == 0)
-		ports[ports_c++] = FTP_PORT;
-
 	/* FIXME should be configurable whether IPv4 and IPv6 FTP connections
 		 are tracked or not - YK */
-	for (i = 0; i < ports_c; i++) {
-		nf_ct_helper_init(&ftp[2 * i], AF_INET, IPPROTO_TCP,
-				  HELPER_NAME, FTP_PORT, ports[i], ports[i],
-				  &ftp_exp_policy, 0, help,
-				  nf_ct_ftp_from_nlattr, THIS_MODULE);
-		nf_ct_helper_init(&ftp[2 * i + 1], AF_INET6, IPPROTO_TCP,
-				  HELPER_NAME, FTP_PORT, ports[i], ports[i],
-				  &ftp_exp_policy, 0, help,
-				  nf_ct_ftp_from_nlattr, THIS_MODULE);
-	}
+	nf_ct_helper_init(&ftp, NFPROTO_UNSPEC, IPPROTO_TCP,
+			  HELPER_NAME,
+			  &ftp_exp_policy, 0, help,
+			  nf_ct_ftp_from_nlattr, THIS_MODULE);
 
-	ret = nf_conntrack_helpers_register(ftp, ports_c * 2, ftp_ptr);
+	ret = nf_conntrack_helper_register(&ftp, &ftp_ptr);
 	if (ret < 0) {
 		pr_err("failed to register helpers\n");
 		return ret;
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 24931e379985bb..98b9753d5e65e1 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -1713,19 +1713,19 @@ static int __init h323_helper_init(void)
 	int ret;
 
 	nf_ct_helper_init(&nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP,
-			  "RAS", RAS_PORT, RAS_PORT, RAS_PORT,
+			  "RAS",
 			  &ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);
 	nf_ct_helper_init(&nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP,
-			  "RAS", RAS_PORT, RAS_PORT, RAS_PORT,
+			  "RAS",
 			  &ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);
 	nf_ct_helper_init(&nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP,
-			  "H.245", 0, 0, 0,
+			  "H.245",
 			  &h245_exp_policy, 0, h245_help, NULL, THIS_MODULE);
 	nf_ct_helper_init(&nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP,
-			  "Q.931", Q931_PORT, Q931_PORT, Q931_PORT,
+			  "Q.931",
 			  &q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);
 	nf_ct_helper_init(&nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP,
-			  "Q.931", Q931_PORT, Q931_PORT, Q931_PORT,
+			  "Q.931",
 			  &q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);
 
 	ret = nf_conntrack_helper_register(&nf_conntrack_helper_h245,
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index 500509b17663ed..506c5803476155 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -40,12 +40,16 @@ static unsigned int nf_ct_helper_count __read_mostly;
 static DEFINE_MUTEX(nf_ct_nat_helpers_mutex);
 static struct list_head nf_ct_nat_helpers __read_mostly;
 
-/* Stupid hash, but collision free for the default registrations of the
- * helpers currently in the kernel. */
-static unsigned int helper_hash(const struct nf_conntrack_tuple *tuple)
+static unsigned int helper_hash(const char *name, u8 protonum)
 {
-	return (((tuple->src.l3num << 8) | tuple->dst.protonum) ^
-		(__force __u16)tuple->src.u.all) % nf_ct_helper_hsize;
+	static u32 seed;
+	u32 initval;
+
+	get_random_once(&seed, sizeof(seed));
+
+	initval = seed ^ protonum;
+
+	return jhash(name, strlen(name), initval) % nf_ct_helper_hsize;
 }
 
 struct nf_conntrack_helper *
@@ -54,18 +58,18 @@ __nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum)
 	struct nf_conntrack_helper *h;
 	unsigned int i;
 
-	for (i = 0; i < nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry_rcu(h, &nf_ct_helper_hash[i], hnode) {
-			if (strcmp(h->name, name))
-				continue;
+	if (!nf_ct_helper_hash)
+		return NULL;
 
-			if (h->tuple.src.l3num != NFPROTO_UNSPEC &&
-			    h->tuple.src.l3num != l3num)
-				continue;
+	i = helper_hash(name, protonum);
 
-			if (h->tuple.dst.protonum == protonum)
-				return h;
-		}
+	hlist_for_each_entry_rcu(h, &nf_ct_helper_hash[i], hnode) {
+		if (strcmp(h->name, name))
+			continue;
+		if (h->nfproto != NFPROTO_UNSPEC && h->nfproto != l3num)
+			continue;
+		if (h->l4proto == protonum)
+			return h;
 	}
 	return NULL;
 }
@@ -363,9 +367,8 @@ EXPORT_SYMBOL_GPL(nf_ct_helper_log);
 
 int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)
 {
-	struct nf_conntrack_tuple_mask mask = { .src.u.all = htons(0xFFFF) };
-	unsigned int h = helper_hash(&me->tuple);
 	struct nf_conntrack_helper *cur;
+	unsigned int h;
 	int ret = 0, i;
 
 	BUG_ON(me->expect_class_max >= NF_CT_MAX_EXPECT_CLASSES);
@@ -382,29 +385,18 @@ int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)
 			return -EINVAL;
 	}
 
+	h = helper_hash(me->name, me->l4proto);
 	mutex_lock(&nf_ct_helper_mutex);
-	for (i = 0; i < nf_ct_helper_hsize; i++) {
-		hlist_for_each_entry(cur, &nf_ct_helper_hash[i], hnode) {
-			if (!strcmp(cur->name, me->name) &&
-			    (cur->tuple.src.l3num == NFPROTO_UNSPEC ||
-			     cur->tuple.src.l3num == me->tuple.src.l3num) &&
-			    cur->tuple.dst.protonum == me->tuple.dst.protonum) {
-				ret = -EBUSY;
-				goto out;
-			}
+	hlist_for_each_entry(cur, &nf_ct_helper_hash[h], hnode) {
+		if (!strcmp(cur->name, me->name) &&
+		    (cur->nfproto == NFPROTO_UNSPEC ||
+		     cur->nfproto == me->nfproto) &&
+		    cur->l4proto == me->l4proto) {
+			ret = -EBUSY;
+			goto out;
 		}
 	}
 
-	/* avoid unpredictable behaviour for auto_assign_helper */
-	if (!(me->flags & NF_CT_HELPER_F_USERSPACE)) {
-		hlist_for_each_entry(cur, &nf_ct_helper_hash[h], hnode) {
-			if (nf_ct_tuple_src_mask_cmp(&cur->tuple, &me->tuple,
-						     &mask)) {
-				ret = -EBUSY;
-				goto out;
-			}
-		}
-	}
 	refcount_set(&me->ct_refcnt, 1);
 	hlist_add_head_rcu(&me->hnode, &nf_ct_helper_hash[h]);
 	nf_ct_helper_count++;
@@ -479,8 +471,7 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)
 EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);
 
 void nf_ct_helper_init(struct nf_conntrack_helper *helper,
-		       u16 l3num, u16 protonum, const char *name,
-		       u16 default_port, u16 spec_port, u32 id,
+		       u8 l3num, u16 protonum, const char *name,
 		       const struct nf_conntrack_expect_policy *exp_pol,
 		       u32 expect_class_max,
 		       int (*help)(struct sk_buff *skb, unsigned int protoff,
@@ -492,9 +483,8 @@ void nf_ct_helper_init(struct nf_conntrack_helper *helper,
 {
 	memset(helper, 0, sizeof(*helper));
 
-	helper->tuple.src.l3num = l3num;
-	helper->tuple.dst.protonum = protonum;
-	helper->tuple.src.u.all = htons(spec_port);
+	helper->nfproto = l3num;
+	helper->l4proto = protonum;
 
 	rcu_assign_pointer(helper->help, help);
 	helper->from_nlattr = from_nlattr;
@@ -502,10 +492,7 @@ void nf_ct_helper_init(struct nf_conntrack_helper *helper,
 	snprintf(helper->nat_mod_name, sizeof(helper->nat_mod_name),
 		 NF_NAT_HELPER_PREFIX "%s", name);
 
-	if (spec_port == default_port)
-		snprintf(helper->name, sizeof(helper->name), "%s", name);
-	else
-		snprintf(helper->name, sizeof(helper->name), "%s-%u", name, id);
+	snprintf(helper->name, sizeof(helper->name), "%s", name);
 
 	if (WARN_ON_ONCE(expect_class_max >= NF_CT_MAX_EXPECT_CLASSES))
 		return;
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c
index 193ab34db795f9..4e6bafe4143752 100644
--- a/net/netfilter/nf_conntrack_irc.c
+++ b/net/netfilter/nf_conntrack_irc.c
@@ -21,9 +21,6 @@
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <linux/netfilter/nf_conntrack_irc.h>
 
-#define MAX_PORTS 8
-static unsigned short ports[MAX_PORTS];
-static unsigned int ports_c;
 static unsigned int max_dcc_channels = 8;
 static unsigned int dcc_timeout __read_mostly = 300;
 /* This is slow, but it's simple. --RR */
@@ -42,8 +39,6 @@ MODULE_LICENSE("GPL");
 MODULE_ALIAS("ip_conntrack_irc");
 MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);
 
-module_param_array(ports, ushort, &ports_c, 0400);
-MODULE_PARM_DESC(ports, "port numbers of IRC servers");
 module_param(max_dcc_channels, uint, 0400);
 MODULE_PARM_DESC(max_dcc_channels, "max number of expected DCC channels per "
 				   "IRC session");
@@ -254,13 +249,13 @@ static int help(struct sk_buff *skb, unsigned int protoff,
 	return ret;
 }
 
-static struct nf_conntrack_helper irc[MAX_PORTS] __read_mostly;
-static struct nf_conntrack_helper *irc_ptr[MAX_PORTS] __read_mostly;
+static struct nf_conntrack_helper irc __read_mostly;
+static struct nf_conntrack_helper *irc_ptr __read_mostly;
 static struct nf_conntrack_expect_policy irc_exp_policy;
 
 static int __init nf_conntrack_irc_init(void)
 {
-	int i, ret;
+	int ret;
 
 	nf_conntrack_helper_deprecated(HELPER_NAME);
 
@@ -282,17 +277,11 @@ static int __init nf_conntrack_irc_init(void)
 	if (!irc_buffer)
 		return -ENOMEM;
 
-	/* If no port given, default to standard irc port */
-	if (ports_c == 0)
-		ports[ports_c++] = IRC_PORT;
+	nf_ct_helper_init(&irc, AF_INET, IPPROTO_TCP, HELPER_NAME,
+			  &irc_exp_policy,
+			  0, help, NULL, THIS_MODULE);
 
-	for (i = 0; i < ports_c; i++) {
-		nf_ct_helper_init(&irc[i], AF_INET, IPPROTO_TCP, HELPER_NAME,
-				  IRC_PORT, ports[i], i, &irc_exp_policy,
-				  0, help, NULL, THIS_MODULE);
-	}
-
-	ret = nf_conntrack_helpers_register(&irc[0], ports_c, irc_ptr);
+	ret = nf_conntrack_helper_register(&irc, &irc_ptr);
 	if (ret) {
 		pr_err("failed to register helpers\n");
 		kfree(irc_buffer);
@@ -304,7 +293,7 @@ static int __init nf_conntrack_irc_init(void)
 
 static void __exit nf_conntrack_irc_fini(void)
 {
-	nf_conntrack_helpers_unregister(irc_ptr, ports_c);
+	nf_conntrack_helper_unregister(irc_ptr);
 	kfree(irc_buffer);
 }
 
diff --git a/net/netfilter/nf_conntrack_netbios_ns.c b/net/netfilter/nf_conntrack_netbios_ns.c
index 89d1cf7d6512e7..caa2b101fa9e5e 100644
--- a/net/netfilter/nf_conntrack_netbios_ns.c
+++ b/net/netfilter/nf_conntrack_netbios_ns.c
@@ -21,7 +21,6 @@
 #include <net/netfilter/nf_conntrack_expect.h>
 
 #define HELPER_NAME	"netbios-ns"
-#define NMBD_PORT	137
 
 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
 MODULE_DESCRIPTION("NetBIOS name service broadcast connection tracking helper");
@@ -54,7 +53,6 @@ static int __init nf_conntrack_netbios_ns_init(void)
 	exp_policy.timeout = timeout;
 
 	nf_ct_helper_init(&helper, AF_INET, IPPROTO_UDP, HELPER_NAME,
-			  NMBD_PORT, NMBD_PORT, NMBD_PORT,
 			  &exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE);
 
 	return nf_conntrack_helper_register(&helper, &helper_ptr);
diff --git a/net/netfilter/nf_conntrack_ovs.c b/net/netfilter/nf_conntrack_ovs.c
index 49d1511e992185..b4085af3ad1ce0 100644
--- a/net/netfilter/nf_conntrack_ovs.c
+++ b/net/netfilter/nf_conntrack_ovs.c
@@ -31,8 +31,8 @@ int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,
 	if (!helper)
 		return NF_ACCEPT;
 
-	if (helper->tuple.src.l3num != NFPROTO_UNSPEC &&
-	    helper->tuple.src.l3num != proto)
+	if (helper->nfproto != NFPROTO_UNSPEC &&
+	    helper->nfproto != proto)
 		return NF_ACCEPT;
 
 	switch (proto) {
@@ -60,7 +60,7 @@ int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,
 		return NF_DROP;
 	}
 
-	if (helper->tuple.dst.protonum != proto)
+	if (helper->l4proto != proto)
 		return NF_ACCEPT;
 
 	helper_cb = rcu_dereference(helper->help);
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 80fc14c87ddc4b..cbf32a3cb1f612 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -540,7 +540,7 @@ static int __init nf_conntrack_pptp_init(void)
 	NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_pptp_master));
 
 	nf_ct_helper_init(&pptp, AF_INET, IPPROTO_TCP,
-			  "pptp", PPTP_CONTROL_PORT, PPTP_CONTROL_PORT, PPTP_CONTROL_PORT,
+			  "pptp",
 			  &pptp_exp_policy, 0, conntrack_pptp_help, NULL, THIS_MODULE);
 
 	pptp.destroy = gre_pptp_destroy_siblings;
diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c
index 39085acf7a7185..a0658f69d78fbb 100644
--- a/net/netfilter/nf_conntrack_sane.c
+++ b/net/netfilter/nf_conntrack_sane.c
@@ -34,11 +34,6 @@ MODULE_AUTHOR("Michal Schmidt <mschmidt@redhat.com>");
 MODULE_DESCRIPTION("SANE connection tracking helper");
 MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);
 
-#define MAX_PORTS 8
-static u_int16_t ports[MAX_PORTS];
-static unsigned int ports_c;
-module_param_array(ports, ushort, &ports_c, 0400);
-
 struct sane_request {
 	__be32 RPC_code;
 #define SANE_NET_START      7   /* RPC code */
@@ -169,8 +164,8 @@ static int help(struct sk_buff *skb,
 	return ret;
 }
 
-static struct nf_conntrack_helper sane[MAX_PORTS * 2] __read_mostly;
-static struct nf_conntrack_helper *sane_ptr[MAX_PORTS * 2] __read_mostly;
+static struct nf_conntrack_helper sane __read_mostly;
+static struct nf_conntrack_helper *sane_ptr __read_mostly;
 
 static const struct nf_conntrack_expect_policy sane_exp_policy = {
 	.max_expected	= 1,
@@ -179,32 +174,21 @@ static const struct nf_conntrack_expect_policy sane_exp_policy = {
 
 static void __exit nf_conntrack_sane_fini(void)
 {
-	nf_conntrack_helpers_unregister(sane_ptr, ports_c * 2);
+	nf_conntrack_helper_unregister(sane_ptr);
 }
 
 static int __init nf_conntrack_sane_init(void)
 {
-	int i, ret = 0;
+	int ret = 0;
 
 	NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sane_master));
 
-	if (ports_c == 0)
-		ports[ports_c++] = SANE_PORT;
-
-	/* FIXME should be configurable whether IPv4 and IPv6 connections
-		 are tracked or not - YK */
-	for (i = 0; i < ports_c; i++) {
-		nf_ct_helper_init(&sane[2 * i], AF_INET, IPPROTO_TCP,
-				  HELPER_NAME, SANE_PORT, ports[i], ports[i],
-				  &sane_exp_policy, 0, help, NULL,
-				  THIS_MODULE);
-		nf_ct_helper_init(&sane[2 * i + 1], AF_INET6, IPPROTO_TCP,
-				  HELPER_NAME, SANE_PORT, ports[i], ports[i],
-				  &sane_exp_policy, 0, help, NULL,
-				  THIS_MODULE);
-	}
+	nf_ct_helper_init(&sane, NFPROTO_UNSPEC, IPPROTO_TCP,
+			  HELPER_NAME,
+			  &sane_exp_policy, 0, help, NULL,
+			  THIS_MODULE);
 
-	ret = nf_conntrack_helpers_register(sane, ports_c * 2, sane_ptr);
+	ret = nf_conntrack_helper_register(&sane, &sane_ptr);
 	if (ret < 0) {
 		pr_err("failed to register helpers\n");
 		return ret;
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 5ec3a4a4bbd707..d0b85b8ad1e6d8 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -35,12 +35,6 @@ MODULE_DESCRIPTION("SIP connection tracking helper");
 MODULE_ALIAS("ip_conntrack_sip");
 MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);
 
-#define MAX_PORTS	8
-static unsigned short ports[MAX_PORTS];
-static unsigned int ports_c;
-module_param_array(ports, ushort, &ports_c, 0400);
-MODULE_PARM_DESC(ports, "port numbers of SIP servers");
-
 static unsigned int sip_timeout __read_mostly = SIP_TIMEOUT;
 module_param(sip_timeout, uint, 0600);
 MODULE_PARM_DESC(sip_timeout, "timeout for the master SIP session");
@@ -1764,8 +1758,8 @@ static int sip_help_udp(struct sk_buff *skb, unsigned int protoff,
 	return process_sip_msg(skb, ct, protoff, dataoff, &dptr, &datalen);
 }
 
-static struct nf_conntrack_helper sip[MAX_PORTS * 4] __read_mostly;
-static struct nf_conntrack_helper *sip_ptr[MAX_PORTS * 4] __read_mostly;
+static struct nf_conntrack_helper sip[2] __read_mostly;
+static struct nf_conntrack_helper *sip_ptr[2] __read_mostly;
 
 static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1] = {
 	[SIP_EXPECT_SIGNALLING] = {
@@ -1792,38 +1786,25 @@ static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1
 
 static void __exit nf_conntrack_sip_fini(void)
 {
-	nf_conntrack_helpers_unregister(sip_ptr, ports_c * 4);
+	nf_conntrack_helpers_unregister(sip_ptr, 2);
 }
 
 static int __init nf_conntrack_sip_init(void)
 {
-	int i, ret;
+	int ret;
 
 	NF_CT_HELPER_BUILD_BUG_ON(sizeof(struct nf_ct_sip_master));
 
-	if (ports_c == 0)
-		ports[ports_c++] = SIP_PORT;
-
-	for (i = 0; i < ports_c; i++) {
-		nf_ct_helper_init(&sip[4 * i], AF_INET, IPPROTO_UDP,
-				  HELPER_NAME, SIP_PORT, ports[i], i,
-				  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,
-				  NULL, THIS_MODULE);
-		nf_ct_helper_init(&sip[4 * i + 1], AF_INET, IPPROTO_TCP,
-				  HELPER_NAME, SIP_PORT, ports[i], i,
-				  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,
-				  NULL, THIS_MODULE);
-		nf_ct_helper_init(&sip[4 * i + 2], AF_INET6, IPPROTO_UDP,
-				  HELPER_NAME, SIP_PORT, ports[i], i,
-				  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,
-				  NULL, THIS_MODULE);
-		nf_ct_helper_init(&sip[4 * i + 3], AF_INET6, IPPROTO_TCP,
-				  HELPER_NAME, SIP_PORT, ports[i], i,
-				  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,
-				  NULL, THIS_MODULE);
-	}
+	nf_ct_helper_init(&sip[0], NFPROTO_UNSPEC, IPPROTO_UDP,
+			  HELPER_NAME,
+			  sip_exp_policy, SIP_EXPECT_MAX, sip_help_udp,
+			  NULL, THIS_MODULE);
+	nf_ct_helper_init(&sip[1], NFPROTO_UNSPEC, IPPROTO_TCP,
+			  HELPER_NAME,
+			  sip_exp_policy, SIP_EXPECT_MAX, sip_help_tcp,
+			  NULL, THIS_MODULE);
 
-	ret = nf_conntrack_helpers_register(sip, ports_c * 4, sip_ptr);
+	ret = nf_conntrack_helpers_register(sip, 2, sip_ptr);
 	if (ret < 0) {
 		pr_err("failed to register helpers\n");
 		return ret;
diff --git a/net/netfilter/nf_conntrack_snmp.c b/net/netfilter/nf_conntrack_snmp.c
index b6fce5703fce77..109986d5d55e69 100644
--- a/net/netfilter/nf_conntrack_snmp.c
+++ b/net/netfilter/nf_conntrack_snmp.c
@@ -14,8 +14,6 @@
 #include <net/netfilter/nf_conntrack_expect.h>
 #include <linux/netfilter/nf_conntrack_snmp.h>
 
-#define SNMP_PORT	161
-
 MODULE_AUTHOR("Jiri Olsa <jolsa@redhat.com>");
 MODULE_DESCRIPTION("SNMP service broadcast connection tracking helper");
 MODULE_LICENSE("GPL");
@@ -55,7 +53,7 @@ static int __init nf_conntrack_snmp_init(void)
 	exp_policy.timeout = timeout;
 
 	nf_ct_helper_init(&helper, AF_INET, IPPROTO_UDP,
-			  "snmp", SNMP_PORT, SNMP_PORT, SNMP_PORT,
+			  "snmp",
 			  &exp_policy, 0, snmp_conntrack_help, NULL,
 			  THIS_MODULE);
 
diff --git a/net/netfilter/nf_conntrack_tftp.c b/net/netfilter/nf_conntrack_tftp.c
index 4393c435aa3549..a69559edf9b363 100644
--- a/net/netfilter/nf_conntrack_tftp.c
+++ b/net/netfilter/nf_conntrack_tftp.c
@@ -26,12 +26,6 @@ MODULE_LICENSE("GPL");
 MODULE_ALIAS("ip_conntrack_tftp");
 MODULE_ALIAS_NFCT_HELPER(HELPER_NAME);
 
-#define MAX_PORTS 8
-static unsigned short ports[MAX_PORTS];
-static unsigned int ports_c;
-module_param_array(ports, ushort, &ports_c, 0400);
-MODULE_PARM_DESC(ports, "Port numbers of TFTP servers");
-
 nf_nat_tftp_hook_fn __rcu *nf_nat_tftp_hook __read_mostly;
 EXPORT_SYMBOL_GPL(nf_nat_tftp_hook);
 
@@ -95,8 +89,8 @@ static int tftp_help(struct sk_buff *skb,
 	return ret;
 }
 
-static struct nf_conntrack_helper tftp[MAX_PORTS * 2] __read_mostly;
-static struct nf_conntrack_helper *tftp_ptr[MAX_PORTS * 2] __read_mostly;
+static struct nf_conntrack_helper tftp __read_mostly;
+static struct nf_conntrack_helper *tftp_ptr __read_mostly;
 
 static const struct nf_conntrack_expect_policy tftp_exp_policy = {
 	.max_expected	= 1,
@@ -105,30 +99,21 @@ static const struct nf_conntrack_expect_policy tftp_exp_policy = {
 
 static void __exit nf_conntrack_tftp_fini(void)
 {
-	nf_conntrack_helpers_unregister(tftp_ptr, ports_c * 2);
+	nf_conntrack_helper_unregister(tftp_ptr);
 }
 
 static int __init nf_conntrack_tftp_init(void)
 {
-	int i, ret;
+	int ret;
 
 	NF_CT_HELPER_BUILD_BUG_ON(0);
 
-	if (ports_c == 0)
-		ports[ports_c++] = TFTP_PORT;
-
-	for (i = 0; i < ports_c; i++) {
-		nf_ct_helper_init(&tftp[2 * i], AF_INET, IPPROTO_UDP,
-				  HELPER_NAME, TFTP_PORT, ports[i], i,
-				  &tftp_exp_policy, 0, tftp_help, NULL,
-				  THIS_MODULE);
-		nf_ct_helper_init(&tftp[2 * i + 1], AF_INET6, IPPROTO_UDP,
-				  HELPER_NAME, TFTP_PORT, ports[i], i,
-				  &tftp_exp_policy, 0, tftp_help, NULL,
-				  THIS_MODULE);
-	}
+	nf_ct_helper_init(&tftp, NFPROTO_UNSPEC, IPPROTO_UDP,
+			  HELPER_NAME,
+			  &tftp_exp_policy, 0, tftp_help, NULL,
+			  THIS_MODULE);
 
-	ret = nf_conntrack_helpers_register(tftp, ports_c * 2, tftp_ptr);
+	ret = nf_conntrack_helper_register(&tftp, &tftp_ptr);
 	if (ret < 0) {
 		pr_err("failed to register helpers\n");
 		return ret;
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index f1460b683d7af7..56655cb7fe2ad0 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -67,7 +67,7 @@ nfnl_userspace_cthelper(struct sk_buff *skb, unsigned int protoff,
 }
 
 static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = {
-	[NFCTH_TUPLE_L3PROTONUM] = { .type = NLA_U16, },
+	[NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6),
 	[NFCTH_TUPLE_L4PROTONUM] = { .type = NLA_U8, },
 };
 
@@ -254,7 +254,8 @@ nfnl_cthelper_create(const struct nlattr * const tb[],
 	helper->data_len = size;
 
 	helper->flags |= NF_CT_HELPER_F_USERSPACE;
-	memcpy(&helper->tuple, tuple, sizeof(struct nf_conntrack_tuple));
+	helper->nfproto = tuple->src.l3num;
+	helper->l4proto = tuple->dst.protonum;
 
 	helper->me = THIS_MODULE;
 	helper->help = nfnl_userspace_cthelper;
@@ -449,8 +450,8 @@ static int nfnl_cthelper_new(struct sk_buff *skb, const struct nfnl_info *info,
 		if (strncmp(cur->name, helper_name, NF_CT_HELPER_NAME_LEN))
 			continue;
 
-		if ((tuple.src.l3num != cur->tuple.src.l3num ||
-		     tuple.dst.protonum != cur->tuple.dst.protonum))
+		if ((tuple.src.l3num != cur->nfproto ||
+		     tuple.dst.protonum != cur->l4proto))
 			continue;
 
 		if (info->nlh->nlmsg_flags & NLM_F_EXCL)
@@ -479,10 +480,10 @@ nfnl_cthelper_dump_tuple(struct sk_buff *skb,
 		goto nla_put_failure;
 
 	if (nla_put_be16(skb, NFCTH_TUPLE_L3PROTONUM,
-			 htons(helper->tuple.src.l3num)))
+			 htons(helper->nfproto)))
 		goto nla_put_failure;
 
-	if (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper->tuple.dst.protonum))
+	if (nla_put_u8(skb, NFCTH_TUPLE_L4PROTONUM, helper->l4proto))
 		goto nla_put_failure;
 
 	nla_nest_end(skb, nest_parms);
@@ -661,8 +662,8 @@ static int nfnl_cthelper_get(struct sk_buff *skb, const struct nfnl_info *info,
 			continue;
 
 		if (tuple_set &&
-		    (tuple.src.l3num != cur->tuple.src.l3num ||
-		     tuple.dst.protonum != cur->tuple.dst.protonum))
+		    (tuple.src.l3num != cur->nfproto ||
+		     tuple.dst.protonum != cur->l4proto))
 			continue;
 
 		skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
@@ -721,8 +722,8 @@ static int nfnl_cthelper_del(struct sk_buff *skb, const struct nfnl_info *info,
 			continue;
 
 		if (tuple_set &&
-		    (tuple.src.l3num != cur->tuple.src.l3num ||
-		     tuple.dst.protonum != cur->tuple.dst.protonum))
+		    (tuple.src.l3num != cur->nfproto ||
+		     tuple.dst.protonum != cur->l4proto))
 			continue;
 
 		found = true;

gemini-3.1-pro-preview

							input: 14331
							output: 32
							thoughts: 983

**Analyzing a Netfilter Conntrack Helper Patch**

Okay, so I've got this patch that's messing with netfilter conntrack helpers, specifically how they're defined and registered. My immediate thought is, this is a significant functional change. The core of it seems to revolve around eliminating the `tuple` field in `struct nf_conntrack_helper` and replacing it with individual protocol identifiers (`nfproto` and `l4proto`). They've also changed `nf_ct_helper_init` to take an `u8 l3num` instead of `u16 l3num`, and removed some of the now obsolete initialisers. It feels like they're streamlining the helper structure.

My initial interpretation is that this is likely a refactor to align with a more rule-based helper assignment, like what you'd see with nftables or the conntrack target in iptables. The removal of port-based matching further reinforces this; it strongly suggests the system is no longer relying on automatic helper selection by port, which I seem to recall was deprecated and disabled by default anyway. The removal of the tuples and port arrays from the helpers themselves clinches that point.

Given the scope of the change, which touches a fair number of helper modules, I'm thinking a thorough review is in order. The files modified include both header files and the core helper logic, plus specific helper implementations like FTP, IRC, SIP, and TFTP. I'll need to go through the changes to ensure everything is handled correctly.

To make sure I'm testing everything, I'll need to enable these configurations: `CONFIG_NF_CONNTRACK` and all of the individual helper options, as well as `CONFIG_NF_CT_NETLINK_HELPER`. I'll focus on these symbols: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nf_ct_helper_init`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_dump_tuple`, and `nfnl_userspace_cthelper`. I'll start there. Now let's dive into the code...

{
  "Expression": "nf_ct_helper_init",
  "PathPrefix": "net/netfilter/"
}

{
  "Output": "net/netfilter/nf_conntrack_amanda.c=185=static int __init nf_conntrack_amanda_init(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-200-\nnet/netfilter/nf_conntrack_amanda.c:201:\tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-202-\t\t\t  HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c-203-\t\t\t  \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c:204:\tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-205-\t\t\t  HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_ftp.c=571=static int __init nf_conntrack_ftp_init(void)\n--\nnet/netfilter/nf_conntrack_ftp.c-578-\t\t are tracked or not - YK */\nnet/netfilter/nf_conntrack_ftp.c:579:\tnf_ct_helper_init(\u0026ftp, NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_ftp.c-580-\t\t\t  HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_h323_main.c=1711=static int __init h323_helper_init(void)\n--\nnet/netfilter/nf_conntrack_h323_main.c-1714-\nnet/netfilter/nf_conntrack_h323_main.c:1715:\tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1716-\t\t\t  \"RAS\",\nnet/netfilter/nf_conntrack_h323_main.c-1717-\t\t\t  \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1718:\tnf_ct_helper_init(\u0026nf_conntrack_helper_ras[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1719-\t\t\t  \"RAS\",\nnet/netfilter/nf_conntrack_h323_main.c-1720-\t\t\t  \u0026ras_exp_policy, 0, ras_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1721:\tnf_ct_helper_init(\u0026nf_conntrack_helper_h245, AF_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_h323_main.c-1722-\t\t\t  \"H.245\",\nnet/netfilter/nf_conntrack_h323_main.c-1723-\t\t\t  \u0026h245_exp_policy, 0, h245_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1724:\tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[0], AF_INET, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_h323_main.c-1725-\t\t\t  \"Q.931\",\nnet/netfilter/nf_conntrack_h323_main.c-1726-\t\t\t  \u0026q931_exp_policy, 0, q931_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_h323_main.c:1727:\tnf_ct_helper_init(\u0026nf_conntrack_helper_q931[1], AF_INET6, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_h323_main.c-1728-\t\t\t  \"Q.931\",\n--\nnet/netfilter/nf_conntrack_helper.c=471=EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);\nnet/netfilter/nf_conntrack_helper.c-472-\nnet/netfilter/nf_conntrack_helper.c:473:void nf_ct_helper_init(struct nf_conntrack_helper *helper,\nnet/netfilter/nf_conntrack_helper.c-474-\t\t       u8 l3num, u16 protonum, const char *name,\n--\nnet/netfilter/nf_conntrack_helper.c-503-}\nnet/netfilter/nf_conntrack_helper.c:504:EXPORT_SYMBOL_GPL(nf_ct_helper_init);\nnet/netfilter/nf_conntrack_helper.c-505-\n--\nnet/netfilter/nf_conntrack_irc.c=256=static int __init nf_conntrack_irc_init(void)\n--\nnet/netfilter/nf_conntrack_irc.c-279-\nnet/netfilter/nf_conntrack_irc.c:280:\tnf_ct_helper_init(\u0026irc, AF_INET, IPPROTO_TCP, HELPER_NAME,\nnet/netfilter/nf_conntrack_irc.c-281-\t\t\t  \u0026irc_exp_policy,\n--\nnet/netfilter/nf_conntrack_netbios_ns.c=49=static int __init nf_conntrack_netbios_ns_init(void)\n--\nnet/netfilter/nf_conntrack_netbios_ns.c-54-\nnet/netfilter/nf_conntrack_netbios_ns.c:55:\tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP, HELPER_NAME,\nnet/netfilter/nf_conntrack_netbios_ns.c-56-\t\t\t  \u0026exp_policy, 0, netbios_ns_help, NULL, THIS_MODULE);\n--\nnet/netfilter/nf_conntrack_pptp.c=538=static int __init nf_conntrack_pptp_init(void)\n--\nnet/netfilter/nf_conntrack_pptp.c-541-\nnet/netfilter/nf_conntrack_pptp.c:542:\tnf_ct_helper_init(\u0026pptp, AF_INET, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_pptp.c-543-\t\t\t  \"pptp\",\n--\nnet/netfilter/nf_conntrack_sane.c=180=static int __init nf_conntrack_sane_init(void)\n--\nnet/netfilter/nf_conntrack_sane.c-185-\nnet/netfilter/nf_conntrack_sane.c:186:\tnf_ct_helper_init(\u0026sane, NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_sane.c-187-\t\t\t  HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_sip.c=1792=static int __init nf_conntrack_sip_init(void)\n--\nnet/netfilter/nf_conntrack_sip.c-1797-\nnet/netfilter/nf_conntrack_sip.c:1798:\tnf_ct_helper_init(\u0026sip[0], NFPROTO_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_sip.c-1799-\t\t\t  HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_sip.c-1801-\t\t\t  NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_sip.c:1802:\tnf_ct_helper_init(\u0026sip[1], NFPROTO_UNSPEC, IPPROTO_TCP,\nnet/netfilter/nf_conntrack_sip.c-1803-\t\t\t  HELPER_NAME,\n--\nnet/netfilter/nf_conntrack_snmp.c=51=static int __init nf_conntrack_snmp_init(void)\n--\nnet/netfilter/nf_conntrack_snmp.c-54-\nnet/netfilter/nf_conntrack_snmp.c:55:\tnf_ct_helper_init(\u0026helper, AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_snmp.c-56-\t\t\t  \"snmp\",\n--\nnet/netfilter/nf_conntrack_tftp.c=105=static int __init nf_conntrack_tftp_init(void)\n--\nnet/netfilter/nf_conntrack_tftp.c-110-\nnet/netfilter/nf_conntrack_tftp.c:111:\tnf_ct_helper_init(\u0026tftp, NFPROTO_UNSPEC, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_tftp.c-112-\t\t\t  HELPER_NAME,\n"
}

gemini-3.1-pro-preview

							input: 18256
							output: 34
							thoughts: 54

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Diving into the Conntrack Helper Patch**

Right, so this patch is messing with the `nf_ct_helper_init` function and, more importantly, `__nf_conntrack_helper_register`. That immediately tells me we're looking at some low-level changes to the connection tracking helper registration process. Given the nature of this area, I'll need to understand exactly *how* it's been altered and what that signifies. My first step is to zoom in on those functions directly. It’s pretty clear that it’s altering what happens when we register those helpers, and looking at those specific functions will make it clear exactly how they're being changed. I will start by examining `__nf_conntrack_helper_register` and `nf_conntrack_helper_register`. The difference between the two might provide some useful detail, so it's best to have both in mind at the same time. Let's see what's changed and what's different.

{
  "Expression": "nf_conntrack_helper_register",
  "PathPrefix": "net/netfilter/"
}

{
  "Output": "net/netfilter/nf_conntrack_ftp.c=571=static int __init nf_conntrack_ftp_init(void)\n--\nnet/netfilter/nf_conntrack_ftp.c-583-\nnet/netfilter/nf_conntrack_ftp.c:584:\tret = nf_conntrack_helper_register(\u0026ftp, \u0026ftp_ptr);\nnet/netfilter/nf_conntrack_ftp.c-585-\tif (ret \u003c 0) {\n--\nnet/netfilter/nf_conntrack_h323_main.c=1711=static int __init h323_helper_init(void)\n--\nnet/netfilter/nf_conntrack_h323_main.c-1730-\nnet/netfilter/nf_conntrack_h323_main.c:1731:\tret = nf_conntrack_helper_register(\u0026nf_conntrack_helper_h245,\nnet/netfilter/nf_conntrack_h323_main.c-1732-\t\t\t\t\t   \u0026nf_conntrack_helper_h245_ptr);\n--\nnet/netfilter/nf_conntrack_helper.c=366=EXPORT_SYMBOL_GPL(nf_ct_helper_log);\nnet/netfilter/nf_conntrack_helper.c-367-\nnet/netfilter/nf_conntrack_helper.c:368:int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)\nnet/netfilter/nf_conntrack_helper.c-369-{\n--\nnet/netfilter/nf_conntrack_helper.c-406-}\nnet/netfilter/nf_conntrack_helper.c:407:EXPORT_SYMBOL_GPL(__nf_conntrack_helper_register);\nnet/netfilter/nf_conntrack_helper.c-408-\nnet/netfilter/nf_conntrack_helper.c:409:int nf_conntrack_helper_register(struct nf_conntrack_helper *me,\nnet/netfilter/nf_conntrack_helper.c-410-\t\t\t\t struct nf_conntrack_helper **helper_ptr)\n--\nnet/netfilter/nf_conntrack_helper.c-421-\nnet/netfilter/nf_conntrack_helper.c:422:\terr = __nf_conntrack_helper_register(new_helper);\nnet/netfilter/nf_conntrack_helper.c-423-\tif (err \u003c 0)\n--\nnet/netfilter/nf_conntrack_helper.c-433-}\nnet/netfilter/nf_conntrack_helper.c:434:EXPORT_SYMBOL_GPL(nf_conntrack_helper_register);\nnet/netfilter/nf_conntrack_helper.c-435-\n--\nnet/netfilter/nf_conntrack_helper.c=506=int nf_conntrack_helpers_register(struct nf_conntrack_helper *helper,\n--\nnet/netfilter/nf_conntrack_helper.c-522-\nnet/netfilter/nf_conntrack_helper.c:523:\t\terr = __nf_conntrack_helper_register(new_helper);\nnet/netfilter/nf_conntrack_helper.c-524-\t\tif (err \u003c 0) {\n--\nnet/netfilter/nf_conntrack_irc.c=256=static int __init nf_conntrack_irc_init(void)\n--\nnet/netfilter/nf_conntrack_irc.c-283-\nnet/netfilter/nf_conntrack_irc.c:284:\tret = nf_conntrack_helper_register(\u0026irc, \u0026irc_ptr);\nnet/netfilter/nf_conntrack_irc.c-285-\tif (ret) {\n--\nnet/netfilter/nf_conntrack_netbios_ns.c=49=static int __init nf_conntrack_netbios_ns_init(void)\n--\nnet/netfilter/nf_conntrack_netbios_ns.c-57-\nnet/netfilter/nf_conntrack_netbios_ns.c:58:\treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\nnet/netfilter/nf_conntrack_netbios_ns.c-59-}\n--\nnet/netfilter/nf_conntrack_pptp.c=538=static int __init nf_conntrack_pptp_init(void)\n--\nnet/netfilter/nf_conntrack_pptp.c-549-\nnet/netfilter/nf_conntrack_pptp.c:550:\treturn nf_conntrack_helper_register(\u0026pptp, \u0026pptp_ptr);\nnet/netfilter/nf_conntrack_pptp.c-551-}\n--\nnet/netfilter/nf_conntrack_sane.c=180=static int __init nf_conntrack_sane_init(void)\n--\nnet/netfilter/nf_conntrack_sane.c-190-\nnet/netfilter/nf_conntrack_sane.c:191:\tret = nf_conntrack_helper_register(\u0026sane, \u0026sane_ptr);\nnet/netfilter/nf_conntrack_sane.c-192-\tif (ret \u003c 0) {\n--\nnet/netfilter/nf_conntrack_snmp.c=51=static int __init nf_conntrack_snmp_init(void)\n--\nnet/netfilter/nf_conntrack_snmp.c-59-\nnet/netfilter/nf_conntrack_snmp.c:60:\treturn nf_conntrack_helper_register(\u0026helper, \u0026helper_ptr);\nnet/netfilter/nf_conntrack_snmp.c-61-}\n--\nnet/netfilter/nf_conntrack_tftp.c=105=static int __init nf_conntrack_tftp_init(void)\n--\nnet/netfilter/nf_conntrack_tftp.c-115-\nnet/netfilter/nf_conntrack_tftp.c:116:\tret = nf_conntrack_helper_register(\u0026tftp, \u0026tftp_ptr);\nnet/netfilter/nf_conntrack_tftp.c-117-\tif (ret \u003c 0) {\n--\nnet/netfilter/nfnetlink_cthelper.c=220=nfnl_cthelper_create(const struct nlattr * const tb[],\n--\nnet/netfilter/nfnetlink_cthelper.c-281-\nnet/netfilter/nfnetlink_cthelper.c:282:\tret = __nf_conntrack_helper_register(helper);\nnet/netfilter/nfnetlink_cthelper.c-283-\tif (ret \u003c 0)\n"
}

gemini-3.1-pro-preview

							input: 20356
							output: 35
							thoughts: 58

Okay, let's dive into these changes.

**Analyzing the Conntrack Helper Patch**

Right, so this patch is touching `nf_ct_helper_init`, `__nf_conntrack_helper_register`, and `__nf_conntrack_helper_find`. My initial thought is to zero in on that `__nf_conntrack_helper_find` function. Given the naming convention, it's likely responsible for looking up connection tracking helpers, so understanding any modifications there is key to grasping the core impact of this patch. Let's see what's actually been changed in that function; it will likely give the best overview of how conntrack helper behavior has been modified.

{
  "Expression": "__nf_conntrack_helper_find",
  "PathPrefix": "net/netfilter/"
}

{
  "Output": "net/netfilter/nf_conntrack_helper.c=55=struct nf_conntrack_helper *\nnet/netfilter/nf_conntrack_helper.c:56:__nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum)\nnet/netfilter/nf_conntrack_helper.c-57-{\n--\nnet/netfilter/nf_conntrack_helper.c-75-}\nnet/netfilter/nf_conntrack_helper.c:76:EXPORT_SYMBOL_GPL(__nf_conntrack_helper_find);\nnet/netfilter/nf_conntrack_helper.c-77-\n--\nnet/netfilter/nf_conntrack_helper.c=79=nf_conntrack_helper_try_module_get(const char *name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-84-\nnet/netfilter/nf_conntrack_helper.c:85:\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-86-#ifdef CONFIG_MODULES\n--\nnet/netfilter/nf_conntrack_helper.c-90-\t\t\trcu_read_lock();\nnet/netfilter/nf_conntrack_helper.c:91:\t\t\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-92-\t\t} else {\n--\nnet/netfilter/nf_conntrack_helper.c=134=nf_nat_helper_try_module_get(const char *name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-141-\trcu_read_lock();\nnet/netfilter/nf_conntrack_helper.c:142:\th = __nf_conntrack_helper_find(name, l3num, protonum);\nnet/netfilter/nf_conntrack_helper.c-143-\tif (!h) {\n--\nnet/netfilter/nf_conntrack_netlink.c=1926=static int ctnetlink_change_helper(struct nf_conn *ct,\n--\nnet/netfilter/nf_conntrack_netlink.c-1955-\nnet/netfilter/nf_conntrack_netlink.c:1956:\thelper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),\nnet/netfilter/nf_conntrack_netlink.c-1957-\t\t\t\t\t    nf_ct_protonum(ct));\n--\nnet/netfilter/nf_conntrack_netlink.c=2222=ctnetlink_create_conntrack(struct net *net,\n--\nnet/netfilter/nf_conntrack_netlink.c-2250-\nnet/netfilter/nf_conntrack_netlink.c:2251:\t\thelper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct),\nnet/netfilter/nf_conntrack_netlink.c-2252-\t\t\t\t\t\t    nf_ct_protonum(ct));\n--\nnet/netfilter/nf_conntrack_netlink.c-2261-\t\t\trcu_read_lock();\nnet/netfilter/nf_conntrack_netlink.c:2262:\t\t\thelper = __nf_conntrack_helper_find(helpname,\nnet/netfilter/nf_conntrack_netlink.c-2263-\t\t\t\t\t\t\t    nf_ct_l3num(ct),\n--\nnet/netfilter/nf_conntrack_netlink.c=2856=ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct,\n--\nnet/netfilter/nf_conntrack_netlink.c-2880-\nnet/netfilter/nf_conntrack_netlink.c:2881:\t\tassign_helper = __nf_conntrack_helper_find(helpname,\nnet/netfilter/nf_conntrack_netlink.c-2882-\t\t\t\t\t\t\t   nf_ct_l3num(ct),\n"
}

gemini-3.1-pro-preview

							input: 21709
							output: 33
							thoughts: 285

**My Analysis of the Conntrack Helper Implementation**

Alright, let's break this down. From what I'm seeing, these changes are definitely touching on the functional aspects and should be accessible via netlink, specifically with those `nfnetlink_cthelper` and `ctnetlink` interfaces. And of course, the loading of the conntrack helper modules will be key.

My focus should be on those core functions: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, as well as the netlink interface operations: `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. These are the building blocks of this helper system.

And then there's the configuration aspect. We need to be aware of the relevant config options: `NF_CONNTRACK`, naturally, and `NF_CT_NETLINK_HELPER` which I suspect is the config required for netlink, and then all those helper-specific options for protocols such as `NF_CONNTRACK_FTP`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP` `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_BROADCAST`.

Wait a minute, based on the naming convention, `NF_CT_NETLINK_HELPER` is very likely the configuration option tied to `nfnetlink_cthelper.c`. I should probably double-check that config option to be certain.

{
  "Expression": "nfnetlink_cthelper",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

							input: 22437
							output: 32
							thoughts: 12

Here's a summary of my thought process:

**Diving into the Netfilter Makefile**

Okay, time to get my hands dirty. My initial instinct, given the context, is to jump into the `net/netfilter/Makefile`. It's the central configuration and build file for the Netfilter subsystem, and the place where I expect to find the dependencies and build rules I need to examine. I'll start here, because understanding the build process is often key to understanding the underlying architecture and where to look for deeper code functionality. Let's see what secrets it holds.

{
  "Expression": "nfnetlink_cthelper",
  "PathPrefix": "net/netfilter/Makefile"
}

{
  "Output": "net/netfilter/Makefile=38=obj-$(CONFIG_NF_CT_NETLINK_TIMEOUT) += nfnetlink_cttimeout.o\nnet/netfilter/Makefile:39:obj-$(CONFIG_NF_CT_NETLINK_HELPER) += nfnetlink_cthelper.o\nnet/netfilter/Makefile-40-\n"
}

gemini-3.1-pro-preview

							input: 22695
							output: 33
							thoughts: 164

**Examining Netfilter Configuration Options**

Okay, so I'm focusing on Netfilter configurations. Yes, `NF_CT_NETLINK_HELPER` immediately comes to mind. It's the starting point, of course.

Now, I need to broaden the scope a bit, just to make sure I'm not missing anything crucial. Let me quickly scan for related configurations, particularly those concerning connection tracking, as these are often interconnected. Right, here we go: `NF_CONNTRACK_FTP`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, `NF_CONNTRACK_NETBIOS_NS`, and finally, `NF_CONNTRACK_BROADCAST`.

Next, I need to confirm these settings, and their respective dependencies within the Netfilter framework, so the next step is to examine `net/netfilter/Makefile` and `net/ipv4/netfilter/Makefile`. This will provide a more comprehensive view of their interdependencies and how they are handled.

{
  "Expression": "nf_conntrack_ftp",
  "PathPrefix": "net/netfilter/Makefile"
}

{
  "Output": "net/netfilter/Makefile=44=obj-$(CONFIG_NF_CONNTRACK_AMANDA) += nf_conntrack_amanda.o\nnet/netfilter/Makefile:45:obj-$(CONFIG_NF_CONNTRACK_FTP) += nf_conntrack_ftp.o\nnet/netfilter/Makefile-46-obj-$(CONFIG_NF_CONNTRACK_H323) += nf_conntrack_h323.o\n"
}

gemini-3.1-pro-preview

							input: 23279
							output: 35
							thoughts: 182

**Analyzing Connection Tracking Configurations**

Okay, let's get a handle on the `NF_CONNTRACK` configurations we're dealing with. I need a comprehensive overview, so let's start with a list: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, and finally, `NF_CONNTRACK_BROADCAST`. Right, got it.

Hmm, wait a second. That `NF_CONNTRACK_BROADCAST` entry feels out of place in that list. My understanding is that it's often implicitly activated when either `NF_CONNTRACK_NETBIOS_NS` or `NF_CONNTRACK_SNMP` is enabled, and typically shouldn't be listed independently. I should verify that. I'm going to have to check if this is indeed the case.

{
  "Expression": "NF_CONNTRACK_BROADCAST",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "Output": "net/netfilter/Kconfig=258=config NF_CONNTRACK_IRC\n--\nnet/netfilter/Kconfig-273-\nnet/netfilter/Kconfig:274:config NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-275-\ttristate\n--\nnet/netfilter/Kconfig=277=config NF_CONNTRACK_NETBIOS_NS\nnet/netfilter/Kconfig-278-\ttristate \"NetBIOS name service protocol support\"\nnet/netfilter/Kconfig:279:\tselect NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-280-\thelp\n--\nnet/netfilter/Kconfig=296=config NF_CONNTRACK_SNMP\n--\nnet/netfilter/Kconfig-298-\tdepends on NETFILTER_ADVANCED\nnet/netfilter/Kconfig:299:\tselect NF_CONNTRACK_BROADCAST\nnet/netfilter/Kconfig-300-\thelp\n"
}

gemini-3.1-pro-preview

							input: 24018
							output: 37
							thoughts: 46

Okay, here's my take on those thoughts:

**Streamlining the Netfilter Considerations**

Alright, it seems unnecessary to explicitly enumerate `NF_CONNTRACK_BROADCAST`. I can infer that based on the context, so there's no need for that overhead. Let's move on and ensure we're thorough. My next step will be to verify the usage and context of `NF_CONNTRACK_SNMP` within the `net/ipv4/netfilter/Makefile` file. Checking that Makefile should provide the necessary information.

{
  "Expression": "nf_nat_snmp_basic",
  "PathPrefix": "net/ipv4/netfilter/Makefile"
}

{
  "Output": "net/ipv4/netfilter/Makefile=17=obj-$(CONFIG_NF_NAT_PPTP) += nf_nat_pptp.o\nnet/ipv4/netfilter/Makefile-18-\nnet/ipv4/netfilter/Makefile:19:nf_nat_snmp_basic-y := nf_nat_snmp_basic.asn1.o nf_nat_snmp_basic_main.o\nnet/ipv4/netfilter/Makefile:20:$(obj)/nf_nat_snmp_basic_main.o: $(obj)/nf_nat_snmp_basic.asn1.h\nnet/ipv4/netfilter/Makefile:21:obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o\nnet/ipv4/netfilter/Makefile-22-\n"
}

gemini-3.1-pro-preview

							input: 24427
							output: 34
							thoughts: 57

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the SNMP NAT Module**

Right, so I see we're dealing with `nf_nat_snmp_basic_main.c`. That tells me we're working with the basic SNMP NAT implementation, and it's compiled conditionally under `CONFIG_NF_NAT_SNMP_BASIC`. Seems straightforward enough. The next logical step is to confirm the object file. Where does `nf_conntrack_snmp.o` live? It's likely built as part of the main `netfilter` subsystem, so I'll quickly check the `net/netfilter/Makefile`. That'll confirm the build process and any potential dependencies or linking issues. It's good to keep track of these things.

{
  "Expression": "nf_conntrack_snmp",
  "PathPrefix": "net/netfilter/Makefile"
}

{
  "Output": "net/netfilter/Makefile=49=obj-$(CONFIG_NF_CONNTRACK_NETBIOS_NS) += nf_conntrack_netbios_ns.o\nnet/netfilter/Makefile:50:obj-$(CONFIG_NF_CONNTRACK_SNMP) += nf_conntrack_snmp.o\nnet/netfilter/Makefile-51-obj-$(CONFIG_NF_CONNTRACK_PPTP) += nf_conntrack_pptp.o\n"
}

gemini-3.1-pro-preview

							input: 24815
							output: 40
							thoughts: 235

**Analyzing Connection Tracking Helper Configurations**

Okay, so I'm looking at this connection tracking stuff, specifically these kernel configurations: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, and so on, all the way down to `NF_NAT_SNMP_BASIC`. Clearly, these all relate to enabling and configuring various connection tracking helpers. I see a broad array, including protocols like FTP, H.323, IRC, and even SNMP. Good, I like that the modules are separated by specific needs.

Now, I need to understand the underlying mechanics. I'm focusing on the core functions related to helper management: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. These clearly deal with registering, unregistering, finding, and managing the helper modules themselves within the Netfilter framework. The `nfnl_*` functions indicate the use of Netlink for communication.

Before I go further, let me just double check `nfnetlink_cthelper.c` to see if there's anything else that's been touched in that file. It's always a good idea to perform a deeper dive into the file itself. I'm especially interested in looking for related functions that weren't included in the focus symbols, which could reveal important context that might get missed if I only looked at these functions.

{
  "Expression": "nfnl_cthelper_",
  "PathPrefix": "net/netfilter/nfnetlink_cthelper.c"
}

{
  "Output": "net/netfilter/nfnetlink_cthelper.c=33=struct nfnl_cthelper {\n--\nnet/netfilter/nfnetlink_cthelper.c-37-\nnet/netfilter/nfnetlink_cthelper.c:38:static LIST_HEAD(nfnl_cthelper_list);\nnet/netfilter/nfnetlink_cthelper.c-39-\n--\nnet/netfilter/nfnetlink_cthelper.c=41=nfnl_userspace_cthelper(struct sk_buff *skb, unsigned int protoff,\n--\nnet/netfilter/nfnetlink_cthelper.c-68-\nnet/netfilter/nfnetlink_cthelper.c:69:static const struct nla_policy nfnl_cthelper_tuple_pol[NFCTH_TUPLE_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-70-\t[NFCTH_TUPLE_L3PROTONUM] = NLA_POLICY_MAX(NLA_BE16, NFPROTO_IPV6),\n--\nnet/netfilter/nfnetlink_cthelper.c=74=static int\nnet/netfilter/nfnetlink_cthelper.c:75:nfnl_cthelper_parse_tuple(struct nf_conntrack_tuple *tuple,\nnet/netfilter/nfnetlink_cthelper.c-76-\t\t\t  const struct nlattr *attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-81-\terr = nla_parse_nested_deprecated(tb, NFCTH_TUPLE_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:82:\t\t\t\t\t  nfnl_cthelper_tuple_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-83-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c=98=static int\nnet/netfilter/nfnetlink_cthelper.c:99:nfnl_cthelper_from_nlattr(struct nlattr *attr, struct nf_conn *ct)\nnet/netfilter/nfnetlink_cthelper.c-100-{\n--\nnet/netfilter/nfnetlink_cthelper.c=118=static int\nnet/netfilter/nfnetlink_cthelper.c:119:nfnl_cthelper_to_nlattr(struct sk_buff *skb, const struct nf_conn *ct)\nnet/netfilter/nfnetlink_cthelper.c-120-{\n--\nnet/netfilter/nfnetlink_cthelper.c-137-\nnet/netfilter/nfnetlink_cthelper.c:138:static const struct nla_policy nfnl_cthelper_expect_pol[NFCTH_POLICY_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-139-\t[NFCTH_POLICY_NAME] = { .type = NLA_NUL_STRING,\n--\nnet/netfilter/nfnetlink_cthelper.c=145=static int\nnet/netfilter/nfnetlink_cthelper.c:146:nfnl_cthelper_expect_policy(struct nf_conntrack_expect_policy *expect_policy,\nnet/netfilter/nfnetlink_cthelper.c-147-\t\t\t    const struct nlattr *attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-152-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:153:\t\t\t\t\t  nfnl_cthelper_expect_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-154-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c=175=static const struct nla_policy\nnet/netfilter/nfnetlink_cthelper.c:176:nfnl_cthelper_expect_policy_set[NFCTH_POLICY_SET_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-177-\t[NFCTH_POLICY_SET_NUM] = NLA_POLICY_MAX(NLA_BE32, NF_CT_MAX_EXPECT_CLASSES),\n--\nnet/netfilter/nfnetlink_cthelper.c=180=static int\nnet/netfilter/nfnetlink_cthelper.c:181:nfnl_cthelper_parse_expect_policy(struct nf_conntrack_helper *helper,\nnet/netfilter/nfnetlink_cthelper.c-182-\t\t\t\t  const struct nlattr *attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-188-\tret = nla_parse_nested_deprecated(tb, NFCTH_POLICY_SET_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:189:\t\t\t\t\t  nfnl_cthelper_expect_policy_set,\nnet/netfilter/nfnetlink_cthelper.c-190-\t\t\t\t\t  NULL);\n--\nnet/netfilter/nfnetlink_cthelper.c-206-\nnet/netfilter/nfnetlink_cthelper.c:207:\t\tret = nfnl_cthelper_expect_policy(\u0026helper-\u003eexpect_policy[i],\nnet/netfilter/nfnetlink_cthelper.c-208-\t\t\t\t\t\t  tb[NFCTH_POLICY_SET+i]);\n--\nnet/netfilter/nfnetlink_cthelper.c=219=static int\nnet/netfilter/nfnetlink_cthelper.c:220:nfnl_cthelper_create(const struct nlattr * const tb[],\nnet/netfilter/nfnetlink_cthelper.c-221-\t\t     struct nf_conntrack_tuple *tuple)\n--\nnet/netfilter/nfnetlink_cthelper.c-242-\nnet/netfilter/nfnetlink_cthelper.c:243:\tret = nfnl_cthelper_parse_expect_policy(helper, tb[NFCTH_POLICY]);\nnet/netfilter/nfnetlink_cthelper.c-244-\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-261-\thelper-\u003ehelp = nfnl_userspace_cthelper;\nnet/netfilter/nfnetlink_cthelper.c:262:\thelper-\u003efrom_nlattr = nfnl_cthelper_from_nlattr;\nnet/netfilter/nfnetlink_cthelper.c:263:\thelper-\u003eto_nlattr = nfnl_cthelper_to_nlattr;\nnet/netfilter/nfnetlink_cthelper.c-264-\n--\nnet/netfilter/nfnetlink_cthelper.c-285-\nnet/netfilter/nfnetlink_cthelper.c:286:\tlist_add_tail(\u0026nfcth-\u003elist, \u0026nfnl_cthelper_list);\nnet/netfilter/nfnetlink_cthelper.c-287-\treturn 0;\n--\nnet/netfilter/nfnetlink_cthelper.c=295=static int\nnet/netfilter/nfnetlink_cthelper.c:296:nfnl_cthelper_update_policy_one(const struct nf_conntrack_expect_policy *policy,\nnet/netfilter/nfnetlink_cthelper.c-297-\t\t\t\tstruct nf_conntrack_expect_policy *new_policy,\n--\nnet/netfilter/nfnetlink_cthelper.c-303-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:304:\t\t\t\t\t  nfnl_cthelper_expect_pol, NULL);\nnet/netfilter/nfnetlink_cthelper.c-305-\tif (err \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-326-\nnet/netfilter/nfnetlink_cthelper.c:327:static int nfnl_cthelper_update_policy_all(struct nlattr *tb[],\nnet/netfilter/nfnetlink_cthelper.c-328-\t\t\t\t\t   struct nf_conntrack_helper *helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-347-\nnet/netfilter/nfnetlink_cthelper.c:348:\t\tret = nfnl_cthelper_update_policy_one(\u0026helper-\u003eexpect_policy[i],\nnet/netfilter/nfnetlink_cthelper.c-349-\t\t\t\t\t\t      \u0026new_policy[i],\n--\nnet/netfilter/nfnetlink_cthelper.c-366-\nnet/netfilter/nfnetlink_cthelper.c:367:static int nfnl_cthelper_update_policy(struct nf_conntrack_helper *helper,\nnet/netfilter/nfnetlink_cthelper.c-368-\t\t\t\t       const struct nlattr *attr)\n--\nnet/netfilter/nfnetlink_cthelper.c-374-\terr = nla_parse_nested_deprecated(tb, NFCTH_POLICY_SET_MAX, attr,\nnet/netfilter/nfnetlink_cthelper.c:375:\t\t\t\t\t  nfnl_cthelper_expect_policy_set,\nnet/netfilter/nfnetlink_cthelper.c-376-\t\t\t\t\t  NULL);\n--\nnet/netfilter/nfnetlink_cthelper.c-386-\nnet/netfilter/nfnetlink_cthelper.c:387:\treturn nfnl_cthelper_update_policy_all(tb, helper);\nnet/netfilter/nfnetlink_cthelper.c-388-}\n--\nnet/netfilter/nfnetlink_cthelper.c=390=static int\nnet/netfilter/nfnetlink_cthelper.c:391:nfnl_cthelper_update(const struct nlattr * const tb[],\nnet/netfilter/nfnetlink_cthelper.c-392-\t\t     struct nf_conntrack_helper *helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-403-\tif (tb[NFCTH_POLICY]) {\nnet/netfilter/nfnetlink_cthelper.c:404:\t\tret = nfnl_cthelper_update_policy(helper, tb[NFCTH_POLICY]);\nnet/netfilter/nfnetlink_cthelper.c-405-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-425-\nnet/netfilter/nfnetlink_cthelper.c:426:static int nfnl_cthelper_new(struct sk_buff *skb, const struct nfnl_info *info,\nnet/netfilter/nfnetlink_cthelper.c-427-\t\t\t     const struct nlattr * const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-442-\nnet/netfilter/nfnetlink_cthelper.c:443:\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-444-\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-446-\nnet/netfilter/nfnetlink_cthelper.c:447:\tlist_for_each_entry(nlcth, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-448-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-464-\tif (helper == NULL)\nnet/netfilter/nfnetlink_cthelper.c:465:\t\tret = nfnl_cthelper_create(tb, \u0026tuple);\nnet/netfilter/nfnetlink_cthelper.c-466-\telse\nnet/netfilter/nfnetlink_cthelper.c:467:\t\tret = nfnl_cthelper_update(tb, helper);\nnet/netfilter/nfnetlink_cthelper.c-468-\n--\nnet/netfilter/nfnetlink_cthelper.c=472=static int\nnet/netfilter/nfnetlink_cthelper.c:473:nfnl_cthelper_dump_tuple(struct sk_buff *skb,\nnet/netfilter/nfnetlink_cthelper.c-474-\t\t\t struct nf_conntrack_helper *helper)\n--\nnet/netfilter/nfnetlink_cthelper.c=496=static int\nnet/netfilter/nfnetlink_cthelper.c:497:nfnl_cthelper_dump_policy(struct sk_buff *skb,\nnet/netfilter/nfnetlink_cthelper.c-498-\t\t\tstruct nf_conntrack_helper *helper)\n--\nnet/netfilter/nfnetlink_cthelper.c=537=static int\nnet/netfilter/nfnetlink_cthelper.c:538:nfnl_cthelper_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,\nnet/netfilter/nfnetlink_cthelper.c-539-\t\t\tint event, struct nf_conntrack_helper *helper)\n--\nnet/netfilter/nfnetlink_cthelper.c-556-\nnet/netfilter/nfnetlink_cthelper.c:557:\tif (nfnl_cthelper_dump_tuple(skb, helper) \u003c 0)\nnet/netfilter/nfnetlink_cthelper.c-558-\t\tgoto nla_put_failure;\nnet/netfilter/nfnetlink_cthelper.c-559-\nnet/netfilter/nfnetlink_cthelper.c:560:\tif (nfnl_cthelper_dump_policy(skb, helper) \u003c 0)\nnet/netfilter/nfnetlink_cthelper.c-561-\t\tgoto nla_put_failure;\n--\nnet/netfilter/nfnetlink_cthelper.c=583=static int\nnet/netfilter/nfnetlink_cthelper.c:584:nfnl_cthelper_dump_table(struct sk_buff *skb, struct netlink_callback *cb)\nnet/netfilter/nfnetlink_cthelper.c-585-{\n--\nnet/netfilter/nfnetlink_cthelper.c-606-\t\t\t}\nnet/netfilter/nfnetlink_cthelper.c:607:\t\t\tif (nfnl_cthelper_fill_info(skb,\nnet/netfilter/nfnetlink_cthelper.c-608-\t\t\t\t\t    NETLINK_CB(cb-\u003eskb).portid,\n--\nnet/netfilter/nfnetlink_cthelper.c-625-\nnet/netfilter/nfnetlink_cthelper.c:626:static int nfnl_cthelper_get(struct sk_buff *skb, const struct nfnl_info *info,\nnet/netfilter/nfnetlink_cthelper.c-627-\t\t\t     const struct nlattr * const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-641-\t\tstruct netlink_dump_control c = {\nnet/netfilter/nfnetlink_cthelper.c:642:\t\t\t.dump = nfnl_cthelper_dump_table,\nnet/netfilter/nfnetlink_cthelper.c-643-\t\t};\n--\nnet/netfilter/nfnetlink_cthelper.c-650-\tif (tb[NFCTH_TUPLE]) {\nnet/netfilter/nfnetlink_cthelper.c:651:\t\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-652-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-657-\nnet/netfilter/nfnetlink_cthelper.c:658:\tlist_for_each_entry(nlcth, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-659-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-674-\nnet/netfilter/nfnetlink_cthelper.c:675:\t\tret = nfnl_cthelper_fill_info(skb2, NETLINK_CB(skb).portid,\nnet/netfilter/nfnetlink_cthelper.c-676-\t\t\t\t\t      info-\u003enlh-\u003enlmsg_seq,\n--\nnet/netfilter/nfnetlink_cthelper.c-690-\nnet/netfilter/nfnetlink_cthelper.c:691:static int nfnl_cthelper_del(struct sk_buff *skb, const struct nfnl_info *info,\nnet/netfilter/nfnetlink_cthelper.c-692-\t\t\t     const struct nlattr * const tb[])\n--\nnet/netfilter/nfnetlink_cthelper.c-707-\tif (tb[NFCTH_TUPLE]) {\nnet/netfilter/nfnetlink_cthelper.c:708:\t\tret = nfnl_cthelper_parse_tuple(\u0026tuple, tb[NFCTH_TUPLE]);\nnet/netfilter/nfnetlink_cthelper.c-709-\t\tif (ret \u003c 0)\n--\nnet/netfilter/nfnetlink_cthelper.c-715-\tret = -ENOENT;\nnet/netfilter/nfnetlink_cthelper.c:716:\tlist_for_each_entry_safe(nlcth, n, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-717-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-739-\nnet/netfilter/nfnetlink_cthelper.c:740:static const struct nla_policy nfnl_cthelper_policy[NFCTH_MAX+1] = {\nnet/netfilter/nfnetlink_cthelper.c-741-\t[NFCTH_NAME] = { .type = NLA_NUL_STRING,\n--\nnet/netfilter/nfnetlink_cthelper.c-747-\nnet/netfilter/nfnetlink_cthelper.c:748:static const struct nfnl_callback nfnl_cthelper_cb[NFNL_MSG_CTHELPER_MAX] = {\nnet/netfilter/nfnetlink_cthelper.c-749-\t[NFNL_MSG_CTHELPER_NEW]\t= {\nnet/netfilter/nfnetlink_cthelper.c:750:\t\t.call\t\t= nfnl_cthelper_new,\nnet/netfilter/nfnetlink_cthelper.c-751-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-752-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:753:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-754-\t},\nnet/netfilter/nfnetlink_cthelper.c-755-\t[NFNL_MSG_CTHELPER_GET] = {\nnet/netfilter/nfnetlink_cthelper.c:756:\t\t.call\t\t= nfnl_cthelper_get,\nnet/netfilter/nfnetlink_cthelper.c-757-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-758-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:759:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-760-\t},\nnet/netfilter/nfnetlink_cthelper.c-761-\t[NFNL_MSG_CTHELPER_DEL]\t= {\nnet/netfilter/nfnetlink_cthelper.c:762:\t\t.call\t\t= nfnl_cthelper_del,\nnet/netfilter/nfnetlink_cthelper.c-763-\t\t.type\t\t= NFNL_CB_MUTEX,\nnet/netfilter/nfnetlink_cthelper.c-764-\t\t.attr_count\t= NFCTH_MAX,\nnet/netfilter/nfnetlink_cthelper.c:765:\t\t.policy\t\t= nfnl_cthelper_policy\nnet/netfilter/nfnetlink_cthelper.c-766-\t},\n--\nnet/netfilter/nfnetlink_cthelper.c-768-\nnet/netfilter/nfnetlink_cthelper.c:769:static const struct nfnetlink_subsystem nfnl_cthelper_subsys = {\nnet/netfilter/nfnetlink_cthelper.c-770-\t.name\t\t\t\t= \"cthelper\",\n--\nnet/netfilter/nfnetlink_cthelper.c-772-\t.cb_count\t\t\t= NFNL_MSG_CTHELPER_MAX,\nnet/netfilter/nfnetlink_cthelper.c:773:\t.cb\t\t\t\t= nfnl_cthelper_cb,\nnet/netfilter/nfnetlink_cthelper.c-774-};\n--\nnet/netfilter/nfnetlink_cthelper.c=776=MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTHELPER);\nnet/netfilter/nfnetlink_cthelper.c-777-\nnet/netfilter/nfnetlink_cthelper.c:778:static int __init nfnl_cthelper_init(void)\nnet/netfilter/nfnetlink_cthelper.c-779-{\n--\nnet/netfilter/nfnetlink_cthelper.c-781-\nnet/netfilter/nfnetlink_cthelper.c:782:\tret = nfnetlink_subsys_register(\u0026nfnl_cthelper_subsys);\nnet/netfilter/nfnetlink_cthelper.c-783-\tif (ret \u003c 0) {\n--\nnet/netfilter/nfnetlink_cthelper.c-791-\nnet/netfilter/nfnetlink_cthelper.c:792:static void __exit nfnl_cthelper_exit(void)\nnet/netfilter/nfnetlink_cthelper.c-793-{\n--\nnet/netfilter/nfnetlink_cthelper.c-796-\nnet/netfilter/nfnetlink_cthelper.c:797:\tnfnetlink_subsys_unregister(\u0026nfnl_cthelper_subsys);\nnet/netfilter/nfnetlink_cthelper.c-798-\nnet/netfilter/nfnetlink_cthelper.c:799:\tlist_for_each_entry_safe(nlcth, n, \u0026nfnl_cthelper_list, list) {\nnet/netfilter/nfnetlink_cthelper.c-800-\t\tcur = nlcth-\u003ehelper;\n--\nnet/netfilter/nfnetlink_cthelper.c-806-\nnet/netfilter/nfnetlink_cthelper.c:807:module_init(nfnl_cthelper_init);\nnet/netfilter/nfnetlink_cthelper.c:808:module_exit(nfnl_cthelper_exit);\n"
}

gemini-3.1-pro-preview

							input: 31403
							output: 34
							thoughts: 106

**My Analysis of Conntrack Helper Functions**

Okay, so I need to zero in on specific functions within the `nf_conntrack_helper.c` file. The core ones to focus on for this investigation are: `__nf_conntrack_helper_register`, `nf_conntrack_helper_unregister`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, and `nfnl_cthelper_del`. I'm guessing these are the crucial registration, lookup, creation, and deletion mechanisms related to connection tracking helpers.

Before I go further, it's worth a quick sweep of that file. I want to make absolutely sure I haven't missed a function that was touched during the changes. This quick check will give me a comprehensive overview.

{
  "Expression": "nf_conntrack_helper.c",
  "PathPrefix": "net/netfilter/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

							input: 31742
							output: 37
							thoughts: 28

Okay, here's my summary, presented as a stream of thought:

**Checking `helper_hash` in `nf_conntrack_helper.c`**

Alright, I'm thinking about this conntrack helper issue... Where should I start my investigation? The kernel's conntrack helper implementation is complex. Let's see... a quick mental review suggests a good starting point is likely to involve the helper hash table itself. I need to understand how the system identifies and stores these helpers. I'm going to quickly check in `net/netfilter/nf_conntrack_helper.c`, and specifically grep for `helper_hash`. It should show me the relevant code that manages the helper's internal structure in that module. That should give me the entry point and initial context I need to pursue this deeper.

{
  "Expression": "helper_hash",
  "PathPrefix": "net/netfilter/nf_conntrack_helper.c"
}

{
  "Output": "net/netfilter/nf_conntrack_helper.c=33=static DEFINE_MUTEX(nf_ct_helper_mutex);\nnet/netfilter/nf_conntrack_helper.c:34:struct hlist_head *nf_ct_helper_hash __read_mostly;\nnet/netfilter/nf_conntrack_helper.c:35:EXPORT_SYMBOL_GPL(nf_ct_helper_hash);\nnet/netfilter/nf_conntrack_helper.c-36-unsigned int nf_ct_helper_hsize __read_mostly;\n--\nnet/netfilter/nf_conntrack_helper.c=41=static struct list_head nf_ct_nat_helpers __read_mostly;\nnet/netfilter/nf_conntrack_helper.c-42-\nnet/netfilter/nf_conntrack_helper.c:43:static unsigned int helper_hash(const char *name, u8 protonum)\nnet/netfilter/nf_conntrack_helper.c-44-{\n--\nnet/netfilter/nf_conntrack_helper.c=56=__nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum)\n--\nnet/netfilter/nf_conntrack_helper.c-60-\nnet/netfilter/nf_conntrack_helper.c:61:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-62-\t\treturn NULL;\nnet/netfilter/nf_conntrack_helper.c-63-\nnet/netfilter/nf_conntrack_helper.c:64:\ti = helper_hash(name, protonum);\nnet/netfilter/nf_conntrack_helper.c-65-\nnet/netfilter/nf_conntrack_helper.c:66:\thlist_for_each_entry_rcu(h, \u0026nf_ct_helper_hash[i], hnode) {\nnet/netfilter/nf_conntrack_helper.c-67-\t\tif (strcmp(h-\u003ename, name))\n--\nnet/netfilter/nf_conntrack_helper.c=368=int __nf_conntrack_helper_register(struct nf_conntrack_helper *me)\n--\nnet/netfilter/nf_conntrack_helper.c-376-\nnet/netfilter/nf_conntrack_helper.c:377:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-378-\t\treturn -ENOENT;\n--\nnet/netfilter/nf_conntrack_helper.c-387-\nnet/netfilter/nf_conntrack_helper.c:388:\th = helper_hash(me-\u003ename, me-\u003el4proto);\nnet/netfilter/nf_conntrack_helper.c-389-\tmutex_lock(\u0026nf_ct_helper_mutex);\nnet/netfilter/nf_conntrack_helper.c:390:\thlist_for_each_entry(cur, \u0026nf_ct_helper_hash[h], hnode) {\nnet/netfilter/nf_conntrack_helper.c-391-\t\tif (!strcmp(cur-\u003ename, me-\u003ename) \u0026\u0026\n--\nnet/netfilter/nf_conntrack_helper.c-400-\trefcount_set(\u0026me-\u003ect_refcnt, 1);\nnet/netfilter/nf_conntrack_helper.c:401:\thlist_add_head_rcu(\u0026me-\u003ehnode, \u0026nf_ct_helper_hash[h]);\nnet/netfilter/nf_conntrack_helper.c-402-\tnf_ct_helper_count++;\n--\nnet/netfilter/nf_conntrack_helper.c=566=int nf_conntrack_helper_init(void)\n--\nnet/netfilter/nf_conntrack_helper.c-568-\tnf_ct_helper_hsize = 1; /* gets rounded up to use one page */\nnet/netfilter/nf_conntrack_helper.c:569:\tnf_ct_helper_hash =\nnet/netfilter/nf_conntrack_helper.c-570-\t\tnf_ct_alloc_hashtable(\u0026nf_ct_helper_hsize, 0);\nnet/netfilter/nf_conntrack_helper.c:571:\tif (!nf_ct_helper_hash)\nnet/netfilter/nf_conntrack_helper.c-572-\t\treturn -ENOMEM;\n--\nnet/netfilter/nf_conntrack_helper.c=578=void nf_conntrack_helper_fini(void)\nnet/netfilter/nf_conntrack_helper.c-579-{\nnet/netfilter/nf_conntrack_helper.c:580:\tkvfree(nf_ct_helper_hash);\nnet/netfilter/nf_conntrack_helper.c:581:\tnf_ct_helper_hash = NULL;\nnet/netfilter/nf_conntrack_helper.c-582-}\n"
}

gemini-3.1-pro-preview

							input: 33275
							output: 38
							thoughts: 456

**Refactoring the Connection Tracking Helper Infrastructure**

Okay, so I've been digging into this connection tracking helper code, and it looks like there's a significant refactor underway. The core change is the adoption of `jhash` within the `helper_hash` function, which replaces the simpler bitwise operation. That's a definite performance optimization – good to see.

Beyond the hashing, the signature of the `nf_ct_helper_init` function has also been tweaked. And this change ripples through the core helper management functions. I'm focusing on the changes to `__nf_conntrack_helper_register` and `__nf_conntrack_helper_find`. It's clear that the new hash function and the introduction of `nfproto` and `l4proto` fields are being integrated here, and I'll need to check how these impact overall performance.

Then there's the `nfnetlink_cthelper.c` file. The changes there, within `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, and `nfnl_cthelper_create`, are also important. These functions are being updated to use the new fields too, indicating that they’re being harmonized with the updated helper model, which is necessary. I expect some performance improvement or bug fixes here.

Now, let me just quickly run through the relevant Kconfig options to see if anything else is impacted. Okay, I've got a list here: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, then the more specific helpers: `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`. I'm going to quickly check how `NF_NAT_SNMP_BASIC` interacts with all of this. Ah, and it's for `nf_nat_snmp_basic_main.c` so it's probably not directly affected here. Alright, let's just confirm by looking at the `net/ipv4/netfilter/Kconfig` file, just to be thorough. Okay, good. That should be everything.

{
  "Expression": "NF_NAT_SNMP_BASIC",
  "PathPrefix": "net/ipv4/netfilter/Kconfig"
}

{
  "Output": "net/ipv4/netfilter/Kconfig=99=if NF_NAT\nnet/ipv4/netfilter/Kconfig:100:config NF_NAT_SNMP_BASIC\nnet/ipv4/netfilter/Kconfig-101-\ttristate \"Basic SNMP-ALG support\"\n"
}

gemini-3.1-pro-preview

							input: 34389
							output: 33
							thoughts: 90

Okay, here's my take on those thoughts, framed from my perspective:

**Debugging Network Connection Tracking**

Alright, confirming that `NF_NAT_SNMP_BASIC` is indeed the correct flag to be focusing on. Given the recent modifications to files like `net/netfilter/nf_conntrack_ovs.c`, I need to investigate connection tracking specifically related to Open vSwitch. It looks like the standard kernel might not have that exact filename. It's probably related to an `openvswitch` module, so I should change direction.

{
  "Expression": "nf_conntrack_ovs",
  "PathPrefix": "net/netfilter/"
}

{
  "Output": "net/netfilter/Makefile=14=nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o\nnet/netfilter/Makefile:15:nf_conntrack-$(CONFIG_NF_CONNTRACK_OVS) += nf_conntrack_ovs.o\nnet/netfilter/Makefile-16-nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o\n"
}

gemini-3.1-pro-preview

							input: 34764
							output: 34
							thoughts: 28

Okay, here's my summarized thought process, presented as if I were thinking it:

**Digging into the Kernel Configuration**

Right, so I see this `CONFIG_NF_CONNTRACK_OVS` option... that's interesting. I immediately need to understand where that is defined and what dependencies it has. My instinct is to head straight to `net/netfilter/Kconfig` – that's the likely location for Netfilter-related configurations. I need to get a clear picture of how this option fits into the broader Netfilter ecosystem. Knowing the context of this configuration option is key to assessing its relevance.

{
  "Expression": "NF_CONNTRACK_OVS",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "Output": "net/netfilter/Kconfig=188=config NF_CONNTRACK_LABELS\n--\nnet/netfilter/Kconfig-194-\nnet/netfilter/Kconfig:195:config NF_CONNTRACK_OVS\nnet/netfilter/Kconfig-196-\tbool\n"
}

gemini-3.1-pro-preview

							input: 35041
							output: 28
							thoughts: 15

Here's my attempt at summarizing the thought process, tailored for an expert audience and written in the first person:

**Analyzing a Boolean Configuration**

Okay, so I'm looking at this boolean config. My initial thought is, "Alright, let's see what's actually *using* this thing." I need to understand its impact and where it's being evaluated to determine its purpose and potential consequences if it's toggled. My primary concern is quickly identifying all the dependencies and downstream implications. I'm essentially tracing its usage – which modules, functions, or even other configs reference or depend on its state? Is it just a simple flag, or does its value directly influence critical calculations, conditional branches, or resource allocations within the system? I'm already anticipating that it will not be just a simple single line of usage. So I'll go through and check this item for all references to the value this config represents and understand the usage.

{
  "Expression": "select NF_CONNTRACK_OVS",
  "PathPrefix": ""
}

{
  "Output": "net/openvswitch/Kconfig=6=config OPENVSWITCH\n--\nnet/openvswitch/Kconfig-18-\tselect NET_NSH\nnet/openvswitch/Kconfig:19:\tselect NF_CONNTRACK_OVS if NF_CONNTRACK\nnet/openvswitch/Kconfig-20-\tselect NF_NAT_OVS if NF_NAT\n--\nnet/sched/Kconfig=917=config NET_ACT_CT\n--\nnet/sched/Kconfig-919-\tdepends on NET_CLS_ACT \u0026\u0026 NF_CONNTRACK \u0026\u0026 (!NF_NAT || NF_NAT) \u0026\u0026 NF_FLOW_TABLE\nnet/sched/Kconfig:920:\tselect NF_CONNTRACK_OVS\nnet/sched/Kconfig-921-\tselect NF_NAT_OVS if NF_NAT\n"
}

gemini-3.1-pro-preview

							input: 35492
							output: 40
							thoughts: 496

**My Conntrack Configuration Review**

Okay, so I'm looking at these kernel configurations related to connection tracking, specifically focusing on how they relate to Open vSwitch. The initial observation is that `OPENVSWITCH` and `NET_ACT_CT` seem like the key drivers here, and enabling them seems like a logical starting point. I'll just keep those in mind.

Now, let's go through the configs themselves: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, and the various application-specific helpers: `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, etc. Right now it's just a raw list.

Wait a second… `NF_CONNTRACK_OVS` is a boolean. If I enable `OPENVSWITCH` and `NET_ACT_CT`, that should automatically enable `NF_CONNTRACK_OVS`. That's important to remember, as it reduces the complexity of explicitly managing that config separately.

Let's do a quick scan to make sure there are no other dependent configs. Aha! `NF_CONNTRACK_BROADCAST` is selected by both `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. Interesting.

Now, let's revisit the focus symbols. I've been thinking about the core helper functions: `__nf_conntrack_helper_register`, `__nf_conntrack_helper_find`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create`, and `nf_ct_helper_init`.

Ah, here's a good one: `nf_ct_helper_init`. It seems like *all* the helper modules are calling this during initialization. That’s a key integration point.

I should also check the `helper_hash`. It's static, so I can't directly use it as a symbol to analyze the code. However, it's called by `__nf_conntrack_helper_register` and `__nf_conntrack_helper_find`, so those are still good symbols to focus on.

Wait, there is also `nf_ct_helper` in `net/netfilter/nf_conntrack_ovs.c`. Let's take a look.

{
  "Expression": "nf_ct_helper",
  "PathPrefix": "net/netfilter/nf_conntrack_ovs.c"
}

{
  "Output": "net/netfilter/nf_conntrack_ovs.c-11-/* 'skb' should already be pulled to nh_ofs. */\nnet/netfilter/nf_conntrack_ovs.c:12:int nf_ct_helper(struct sk_buff *skb, struct nf_conn *ct,\nnet/netfilter/nf_conntrack_ovs.c-13-\t\t enum ip_conntrack_info ctinfo, u16 proto)\n--\nnet/netfilter/nf_conntrack_ovs.c-82-}\nnet/netfilter/nf_conntrack_ovs.c:83:EXPORT_SYMBOL_GPL(nf_ct_helper);\nnet/netfilter/nf_conntrack_ovs.c-84-\nnet/netfilter/nf_conntrack_ovs.c=85=int nf_ct_add_helper(struct nf_conn *ct, const char *name, u8 family,\n--\nnet/netfilter/nf_conntrack_ovs.c-95-\nnet/netfilter/nf_conntrack_ovs.c:96:\thelp = nf_ct_helper_ext_add(ct, GFP_KERNEL);\nnet/netfilter/nf_conntrack_ovs.c-97-\tif (!help) {\n"
}

gemini-3.1-pro-preview

							input: 36883
							output: 43
							thoughts: 61

**Focusing on `nf_ct_helper`**

Okay, so I've confirmed that `nf_ct_helper` is indeed exported and, crucially, *modified*. That's a key observation. The way it works, as I understand it, involves checking `helper->nfproto` and `helper->l4proto`. This makes `nf_ct_helper` a strong candidate - a good symbol to concentrate on. My next step will be to dive into `nf_conntrack_broadcast.c`. Let's see what that reveals.

{
  "Expression": "nf_conntrack_broadcast_help",
  "PathPrefix": "net/netfilter/nf_conntrack_broadcast.c"
}

{
  "Output": "net/netfilter/nf_conntrack_broadcast.c-17-\nnet/netfilter/nf_conntrack_broadcast.c:18:int nf_conntrack_broadcast_help(struct sk_buff *skb,\nnet/netfilter/nf_conntrack_broadcast.c-19-\t\t\t\tstruct nf_conn *ct,\n--\nnet/netfilter/nf_conntrack_broadcast.c-88-}\nnet/netfilter/nf_conntrack_broadcast.c:89:EXPORT_SYMBOL_GPL(nf_conntrack_broadcast_help);\nnet/netfilter/nf_conntrack_broadcast.c-90-\n"
}

gemini-3.1-pro-preview

							input: 37278
							output: 39
							thoughts: 69

Here's my summary, as the expert:

**Investigating the `nf_conntrack` Broadcast Helper Modification**

Okay, so I see they removed that line, `exp->tuple.src.u.udp.port = helper->tuple.src.u.udp.port;`, from `nf_conntrack_broadcast_help`. That's interesting, and it immediately catches my eye as a potential point of impact. I can certainly see why this change might be significant, and it's a good place to focus.

Now, my next step is to see if this has implications elsewhere. Let's delve into `nf_conntrack_amanda.c` and see if the Amanda module is impacted by this change. I'll need to understand the implications of this particular port assignment, and how it’s being handled or circumvented now. I'm going to determine if this has the desired outcome or if it has introduced a regression. I will proceed with caution.

{
  "Expression": "amanda_help",
  "PathPrefix": "net/netfilter/nf_conntrack_amanda.c"
}

{
  "Output": "net/netfilter/nf_conntrack_amanda.c=52=static struct {\n--\nnet/netfilter/nf_conntrack_amanda.c-82-\nnet/netfilter/nf_conntrack_amanda.c:83:static int amanda_help(struct sk_buff *skb,\nnet/netfilter/nf_conntrack_amanda.c-84-\t\t       unsigned int protoff,\n--\nnet/netfilter/nf_conntrack_amanda.c-107-\tif (dataoff \u003e= skb-\u003elen) {\nnet/netfilter/nf_conntrack_amanda.c:108:\t\tnet_err_ratelimited(\"amanda_help: skblen = %u\\n\", skb-\u003elen);\nnet/netfilter/nf_conntrack_amanda.c-109-\t\treturn NF_ACCEPT;\n--\nnet/netfilter/nf_conntrack_amanda.c=167=static const struct nf_conntrack_expect_policy amanda_exp_policy = {\n--\nnet/netfilter/nf_conntrack_amanda.c-171-\nnet/netfilter/nf_conntrack_amanda.c:172:static struct nf_conntrack_helper amanda_helper[2] __read_mostly;\nnet/netfilter/nf_conntrack_amanda.c:173:static struct nf_conntrack_helper *amanda_helper_ptr[2] __read_mostly;\nnet/netfilter/nf_conntrack_amanda.c-174-\nnet/netfilter/nf_conntrack_amanda.c=175=static void __exit nf_conntrack_amanda_fini(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-178-\nnet/netfilter/nf_conntrack_amanda.c:179:\tnf_conntrack_helpers_unregister(amanda_helper_ptr,\nnet/netfilter/nf_conntrack_amanda.c:180:\t\t\t\t\tARRAY_SIZE(amanda_helper_ptr));\nnet/netfilter/nf_conntrack_amanda.c-181-\tfor (i = 0; i \u003c ARRAY_SIZE(search); i++)\n--\nnet/netfilter/nf_conntrack_amanda.c=185=static int __init nf_conntrack_amanda_init(void)\n--\nnet/netfilter/nf_conntrack_amanda.c-200-\nnet/netfilter/nf_conntrack_amanda.c:201:\tnf_ct_helper_init(\u0026amanda_helper[0], AF_INET, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-202-\t\t\t  HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c:203:\t\t\t  \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c:204:\tnf_ct_helper_init(\u0026amanda_helper[1], AF_INET6, IPPROTO_UDP,\nnet/netfilter/nf_conntrack_amanda.c-205-\t\t\t  HELPER_NAME,\nnet/netfilter/nf_conntrack_amanda.c:206:\t\t\t  \u0026amanda_exp_policy, 0, amanda_help, NULL, THIS_MODULE);\nnet/netfilter/nf_conntrack_amanda.c-207-\nnet/netfilter/nf_conntrack_amanda.c:208:\tret = nf_conntrack_helpers_register(amanda_helper,\nnet/netfilter/nf_conntrack_amanda.c:209:\t\t\t\t\t    ARRAY_SIZE(amanda_helper),\nnet/netfilter/nf_conntrack_amanda.c:210:\t\t\t\t\t    amanda_helper_ptr);\nnet/netfilter/nf_conntrack_amanda.c-211-\tif (ret \u003c 0)\n"
}

gemini-3.1-pro-preview

							input: 38626
							output: 36
							thoughts: 958

**Focusing the Fuzzing Effort: Connection Tracking Helpers**

Okay, so this patch is touching `nf_ct_helper_init` in a bunch of connection tracking helper modules. My initial thought is that the most relevant symbols to focus on for fuzzing are going to be the initialization functions of these modules, or perhaps just `nf_ct_helper_init` and `__nf_conntrack_helper_register` directly. However, since the initialization happens only once during module load, fuzzing those directly probably won't be as fruitful as targeting things that are constantly in use.

The real meat will likely be in the netlink interface – `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create` – and, crucially, the packet path itself: `nf_ct_helper` and `nf_conntrack_broadcast_help`. Don't forget, `__nf_conntrack_helper_find` gets called whenever a packet matches a helper or when one is assigned via netlink or nftables.

So, let me summarize the key focus symbols:
*   `__nf_conntrack_helper_register`
*   `__nf_conntrack_helper_find`
*   `nf_ct_helper_init`
*   `nfnl_cthelper_new`
*   `nfnl_cthelper_get`
*   `nfnl_cthelper_del`
*   `nfnl_cthelper_create`
*   `nf_ct_helper`
*   `nf_conntrack_broadcast_help`

Now, regarding the configuration options, let's nail down what needs to be enabled to properly test this. I see a bunch of options listed: `NF_CONNTRACK`, `NF_CT_NETLINK_HELPER`, `NF_CONNTRACK_AMANDA`, `NF_CONNTRACK_FTP`, `NF_CONNTRACK_H323`, `NF_CONNTRACK_IRC`, `NF_CONNTRACK_NETBIOS_NS`, `NF_CONNTRACK_PPTP`, `NF_CONNTRACK_SANE`, `NF_CONNTRACK_SIP`, `NF_CONNTRACK_TFTP`, `NF_CONNTRACK_SNMP`, `NF_NAT_SNMP_BASIC`, `OPENVSWITCH`, and `NET_ACT_CT`.

Wait, `NF_CONNTRACK_OVS` is selected by `OPENVSWITCH` and `NET_ACT_CT`, so I can just include those two instead.

Alright, let's double-check if there are any other configs. It looks like `NF_CONNTRACK_BROADCAST` is selected by `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. I'll keep that in mind.

Let me check if `NF_CONNTRACK_OVS` is in `net/netfilter/Makefile`. Yes, I see the entry: `obj-$(CONFIG_NF_CONNTRACK_OVS) += nf_conntrack_ovs.o`.

Now, I need to make sure I'm not missing any dependencies. Does `NF_NAT_SNMP_BASIC` require `NF_NAT`? Yes, it does. Include `NF_NAT`.

Does `NF_CONNTRACK_SNMP` require `NETFILTER_ADVANCED`? Yes, I need `NETFILTER_ADVANCED`.

Let's do a quick check on the others. Does `NF_CONNTRACK_PPTP` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_H323` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_SANE` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_TFTP` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_SIP` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_IRC` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_FTP` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_AMANDA` require `NF_CONNTRACK`? Yes.
Does `NF_CONNTRACK_NETBIOS_NS` require `NF_CONNTRACK`? Yes.
Does `NF_CT_NETLINK_HELPER` require `NF_CT_NETLINK`? Yes, it does. Include `NF_CT_NETLINK`.

Okay, I think I've got a solid list of symbols and configuration options. Now

{
  "Expression": "NF_CT_NETLINK_HELPER",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "Output": "net/netfilter/Kconfig=373=config NF_CT_NETLINK_TIMEOUT\n--\nnet/netfilter/Kconfig-384-\nnet/netfilter/Kconfig:385:config NF_CT_NETLINK_HELPER\nnet/netfilter/Kconfig-386-\ttristate 'Connection tracking helpers in user-space via Netlink'\n"
}

gemini-3.1-pro-preview

							input: 40746
							output: 37
							thoughts: 18

Here's my thought process, summarized as if I were considering the provided prompt:

**Analyzing the Dependency Landscape of NF_CT_NETLINK_HELPER**

Okay, so the task at hand is to summarize a thought process focused on `NF_CT_NETLINK_HELPER`. My immediate focus is going to be on the *dependencies* of this specific component. I know it's a kernel module, likely related to netfilter and connection tracking, and that "NETLINK" suggests communication with userspace. Therefore, my first thought is to dissect what other kernel modules or functions `NF_CT_NETLINK_HELPER` relies upon to function correctly. I'll need to think about which other parts of the netfilter framework might be integrated, any related data structures, and the possible interactions with user-space tools and interfaces. I'll need to figure out what functionality this helper *provides* and from which parts of the kernel it's used. This dependency analysis is crucial to understand the implications of any changes or potential vulnerabilities. I'll be thinking in terms of the kernel build system and potential build order concerns.

{
  "Expression": "config NF_CT_NETLINK_HELPER",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "Output": "net/netfilter/Kconfig=373=config NF_CT_NETLINK_TIMEOUT\n--\nnet/netfilter/Kconfig-384-\nnet/netfilter/Kconfig:385:config NF_CT_NETLINK_HELPER\nnet/netfilter/Kconfig-386-\ttristate 'Connection tracking helpers in user-space via Netlink'\n"
}

gemini-3.1-pro-preview

							input: 41138
							output: 35
							thoughts: 19

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Analyzing the Netfilter Configuration**

Alright, so the instruction says to look at the lines *after* `config NF_CT_NETLINK_HELPER`. My immediate thought is, "Okay, this is about Netfilter and likely its connection tracking module." That `config` line is a configuration option, and the subsequent lines, wherever they are, will tell me something about how that module, `NF_CT_NETLINK_HELPER`, is configured or what its dependencies are. Knowing how that component is configured is crucial, especially because I have to understand the bigger picture and the interactions with other Netfilter modules and kernel subsystems. I want to see what options might affect the behavior of Netfilter in terms of connection tracking and potential netlink interactions. This is going to be important in terms of performance and behavior of any custom firewall rules or network applications depending on that part of the kernel. I anticipate seeing dependencies, default values, and maybe even descriptions of how to enable or disable related features. Let's dig in and see what those lines reveal!

{
  "File": "net/netfilter/Kconfig",
  "FirstLine": 385,
  "LineCount": 10
}

{
  "Contents": " 385:\tconfig NF_CT_NETLINK_HELPER\n 386:\t\ttristate 'Connection tracking helpers in user-space via Netlink'\n 387:\t\tselect NETFILTER_NETLINK\n 388:\t\tdepends on NF_CT_NETLINK\n 389:\t\tdepends on NETFILTER_NETLINK_QUEUE\n 390:\t\tdepends on NETFILTER_NETLINK_GLUE_CT\n 391:\t\tdepends on NETFILTER_ADVANCED\n 392:\t\thelp\n 393:\t\t  This option enables the user-space connection tracking helpers\n 394:\t\t  infrastructure.\n"
}

gemini-3.1-pro-preview

							input: 41600
							output: 38
							thoughts: 97

Okay, here's my take on those considerations.

**Kernel Configuration Dependencies for Netfilter Netlink Functionality**

Right, so to get this Netfilter Netlink functionality working as intended, it's pretty clear we need to make sure a few kernel configuration options are enabled. The core dependency here seems to hinge on `NF_CT_NETLINK`, that’s the starting point. But, of course, that's not the end of the story. We'll also need `NETFILTER_NETLINK_QUEUE` for the queuing mechanism and `NETFILTER_NETLINK_GLUE_CT` - presumably there's some connection there for glueing things together, specifically `ct`. And lastly, `NETFILTER_ADVANCED` feels like a prudent choice, as often the advanced features enable other needed functionality.

I'll make a point of explicitly including `NF_CT_NETLINK`, `NETFILTER_NETLINK_QUEUE`, `NETFILTER_NETLINK_GLUE_CT`, and `NETFILTER_ADVANCED` in the build configuration, just to be sure we're covered.

Now, I want to take a closer look at `NETFILTER_NETLINK_GLUE_CT` specifically and ensure I understand the impact there.

{
  "Expression": "config NETFILTER_NETLINK_GLUE_CT",
  "PathPrefix": "net/netfilter/Kconfig"
}

{
  "Output": "net/netfilter/Kconfig=385=config NF_CT_NETLINK_HELPER\n--\nnet/netfilter/Kconfig-397-\nnet/netfilter/Kconfig:398:config NETFILTER_NETLINK_GLUE_CT\nnet/netfilter/Kconfig-399-\tbool \"NFQUEUE and NFLOG integration with Connection Tracking\"\n"
}

gemini-3.1-pro-preview

							input: 42100
							output: 387
							thoughts: 469

**Analyzing the Conntrack Helper Patch**

Alright, let's break this down. My initial assessment is that the patch seems functional and warrants fuzzing. I've got a list of the relevant configurations: `NF_CONNTRACK`, `NF_CT_NETLINK`, `NETFILTER_NETLINK_QUEUE`, `NETFILTER_NETLINK_GLUE_CT`, `NETFILTER_ADVANCED`, `NF_CT_NETLINK_HELPER`, and then the various application-specific conntrack helpers like FTP, H323, IRC, etc. We also have `NF_NAT` and some associated modules. Crucially, `OPENVSWITCH` and `NET_ACT_CT` are in the mix as well.

The patch itself is focusing on a core area: conntrack helper registration and matching. It's moving away from port-based matching and towards just L3/L4 protocol matching. That's a fundamental change in how helpers get assigned to connections, which is definitely a critical component of netfilter conntrack and is an area that could have interesting implications. I've flagged the key symbols involved in this: `__nf_conntrack_helper_register`, `__nf_conntrack_helper_find`, `nf_ct_helper_init`, `nfnl_cthelper_new`, `nfnl_cthelper_get`, `nfnl_cthelper_del`, `nfnl_cthelper_create`, `nf_ct_helper`, and `nf_conntrack_broadcast_help`.

Now, let's cross-reference these configs. We have a few dependencies to consider. `NF_CONNTRACK_OVS` is a dependency of both `OPENVSWITCH` and `NET_ACT_CT`. `NF_CONNTRACK_BROADCAST` is selected by both `NF_CONNTRACK_NETBIOS_NS` and `NF_CONNTRACK_SNMP`. And `NF_NAT_SNMP_BASIC` is dependent on `NF_NAT`.

I'll consolidate this information into a clear report.

{
  "EnableConfigs": [
    "NF_CONNTRACK",
    "NF_CT_NETLINK",
    "NETFILTER_NETLINK_QUEUE",
    "NETFILTER_NETLINK_GLUE_CT",
    "NETFILTER_ADVANCED",
    "NF_CT_NETLINK_HELPER",
    "NF_CONNTRACK_AMANDA",
    "NF_CONNTRACK_FTP",
    "NF_CONNTRACK_H323",
    "NF_CONNTRACK_IRC",
    "NF_CONNTRACK_NETBIOS_NS",
    "NF_CONNTRACK_PPTP",
    "NF_CONNTRACK_SANE",
    "NF_CONNTRACK_SIP",
    "NF_CONNTRACK_TFTP",
    "NF_CONNTRACK_SNMP",
    "NF_NAT",
    "NF_NAT_SNMP_BASIC",
    "OPENVSWITCH",
    "NET_ACT_CT"
  ],
  "FocusSymbols": [
    "__nf_conntrack_helper_register",
    "__nf_conntrack_helper_find",
    "nf_ct_helper_init",
    "nfnl_cthelper_new",
    "nfnl_cthelper_get",
    "nfnl_cthelper_del",
    "nfnl_cthelper_create",
    "nf_ct_helper",
    "nf_conntrack_broadcast_help"
  ],
  "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "NF_CONNTRACK",
    "NF_CT_NETLINK",
    "NETFILTER_NETLINK_QUEUE",
    "NETFILTER_NETLINK_GLUE_CT",
    "NETFILTER_ADVANCED",
    "NF_CT_NETLINK_HELPER",
    "NF_CONNTRACK_AMANDA",
    "NF_CONNTRACK_FTP",
    "NF_CONNTRACK_H323",
    "NF_CONNTRACK_IRC",
    "NF_CONNTRACK_NETBIOS_NS",
    "NF_CONNTRACK_PPTP",
    "NF_CONNTRACK_SANE",
    "NF_CONNTRACK_SIP",
    "NF_CONNTRACK_TFTP",
    "NF_CONNTRACK_SNMP",
    "NF_NAT",
    "NF_NAT_SNMP_BASIC",
    "OPENVSWITCH",
    "NET_ACT_CT"
  ],
  "FocusSymbols": [
    "__nf_conntrack_helper_register",
    "__nf_conntrack_helper_find",
    "nf_ct_helper_init",
    "nfnl_cthelper_new",
    "nfnl_cthelper_get",
    "nfnl_cthelper_del",
    "nfnl_cthelper_create",
    "nf_ct_helper",
    "nf_conntrack_broadcast_help"
  ],
  "Reasoning": "The patch modifies the core of netfilter conntrack helper registration and matching. It removes the port-based matching and replaces it with L3/L4 protocol matching. This affects how helpers are assigned to connections and how they are managed via netlink. The changes are functional and reachable via netlink and packet processing paths.",
  "WorthFuzzing": true
}

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)