AI Trajectory

null

{
  "EnableConfigs": [
    "XFRM_USER",
    "XFRM_IPTFS",
    "XFRM_MIGRATE",
    "INET_ESP_OFFLOAD",
    "INET6_ESP_OFFLOAD"
  ],
  "FocusSymbols": [
    "validate_xmit_xfrm",
    "xfrm6_fill_dst",
    "xfrm_dev_state_add",
    "iptfs_skb_add_frags",
    "nat_keepalive_send",
    "xfrm_hash_rebuild",
    "xfrm_state_find",
    "xfrm_state_clone_and_setup",
    "xfrm_user_policy",
    "__xfrm_init_state",
    "validate_tmpl"
  ],
  "Reasoning": "The patch fixes multiple functional bugs in the XFRM (IPsec) subsystem, including memory leaks in NAT keepalive and IPv6 policy routing, incorrect handling of async crypto returns (-EINPROGRESS) during packet transmission, a prefix length check bug in hash rebuilding, use-after-free vulnerabilities during state initialization/cloning, and data races in user offload state copying. It also adds proper validation for IPTFS mode and fixes shared fragment handling in IPTFS. These are reachable core kernel logic changes that should be fuzzed.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit 51711bcd2a66df64db451e56948d07788cea009f\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Jul 11 04:40:38 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/net/xfrm.h b/include/net/xfrm.h\nindex 519a0156a05cac..a6d69aaa6cd2d0 100644\n--- a/include/net/xfrm.h\n+++ b/include/net/xfrm.h\n@@ -162,6 +162,8 @@ struct xfrm_dev_offload {\n \t */\n \tstruct net_device\t*real_dev;\n \tunsigned long\t\toffload_handle;\n+\t/* Snapshot the attached device index for dump paths. */\n+\tint\t\t\tifindex;\n \tu8\t\t\tdir : 2;\n \tu8\t\t\ttype : 2;\n \tu8\t\t\tflags : 2;\ndiff --git a/net/core/dev.c b/net/core/dev.c\nindex 4b3d5cfdf6e00f..5933c5dab09ee1 100644\n--- a/net/core/dev.c\n+++ b/net/core/dev.c\n@@ -4018,6 +4018,9 @@ static struct sk_buff *validate_xmit_unreadable_skb(struct sk_buff *skb,\n \treturn NULL;\n }\n \n+/* Returns the skb on success, NULL if dropped, or ERR_PTR(-EINPROGRESS)\n+ * if stolen by async xfrm crypto (delivered via xfrm_dev_resume()).\n+ */\n static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device *dev, bool *again)\n {\n \tnetdev_features_t features;\n@@ -4089,7 +4092,7 @@ struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *d\n \t\tskb-\u003eprev = skb;\n \n \t\tskb = validate_xmit_skb(skb, dev, again);\n-\t\tif (!skb)\n+\t\tif (IS_ERR_OR_NULL(skb))\n \t\t\tcontinue;\n \n \t\tif (!head)\n@@ -4860,8 +4863,11 @@ int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)\n \t\t\tgoto recursion_alert;\n \n \t\tskb = validate_xmit_skb(skb, dev, \u0026again);\n-\t\tif (!skb)\n+\t\tif (IS_ERR_OR_NULL(skb)) {\n+\t\t\tif (PTR_ERR(skb) == -EINPROGRESS)\n+\t\t\t\trc = NET_XMIT_SUCCESS;\n \t\t\tgoto out;\n+\t\t}\n \n \t\tHARD_TX_LOCK(dev, txq, cpu);\n \ndiff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c\nindex 125ea9a5b8a082..3b749475f6ed65 100644\n--- a/net/ipv6/xfrm6_policy.c\n+++ b/net/ipv6/xfrm6_policy.c\n@@ -88,6 +88,7 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,\n \txdst-\u003eu.rt6.rt6i_idev = in6_dev_get(dev);\n \tif (!xdst-\u003eu.rt6.rt6i_idev) {\n \t\tnetdev_put(dev, \u0026xdst-\u003eu.dst.dev_tracker);\n+\t\txdst-\u003eu.dst.dev = NULL;\n \t\treturn -ENODEV;\n \t}\n \ndiff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c\nindex 630f3dd31cc5ce..f153bf695b9dd1 100644\n--- a/net/xfrm/xfrm_device.c\n+++ b/net/xfrm/xfrm_device.c\n@@ -182,7 +182,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur\n \t\terr = x-\u003etype_offload-\u003exmit(x, skb, esp_features);\n \t\tif (err) {\n \t\t\tif (err == -EINPROGRESS)\n-\t\t\t\treturn NULL;\n+\t\t\t\treturn ERR_PTR(-EINPROGRESS);\n \n \t\t\tXFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR);\n \t\t\tkfree_skb(skb);\n@@ -224,7 +224,15 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur\n \t\tpskb = skb2;\n \t}\n \n-\treturn skb;\n+\t/* skb_gso_segment() set skb-\u003eprev to the last segment, but async\n+\t * crypto may have stolen it above without updating -\u003eprev.  Repoint\n+\t * it at the last retained segment so validate_xmit_skb_list() does\n+\t * not chain onto a segment now owned by the crypto engine.\n+\t */\n+\tif (skb)\n+\t\tskb-\u003eprev = pskb;\n+\n+\treturn skb ? skb : ERR_PTR(-EINPROGRESS);\n }\n EXPORT_SYMBOL_GPL(validate_xmit_xfrm);\n \n@@ -313,6 +321,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,\n \t}\n \n \txso-\u003edev = dev;\n+\txso-\u003eifindex = dev-\u003eifindex;\n \tnetdev_tracker_alloc(dev, \u0026xso-\u003edev_tracker, GFP_ATOMIC);\n \n \tif (xuo-\u003eflags \u0026 XFRM_OFFLOAD_INBOUND)\ndiff --git a/net/xfrm/xfrm_iptfs.c b/net/xfrm/xfrm_iptfs.c\nindex ad810d1f97c067..597aedeac26eba 100644\n--- a/net/xfrm/xfrm_iptfs.c\n+++ b/net/xfrm/xfrm_iptfs.c\n@@ -480,6 +480,7 @@ static int iptfs_skb_add_frags(struct sk_buff *skb,\n \t\t}\n \t\t__skb_frag_ref(tofrag);\n \t\tshinfo-\u003enr_frags++;\n+\t\tshinfo-\u003eflags |= SKBFL_SHARED_FRAG;\n \n \t\t/* see if we are done */\n \t\tfraglen = tofrag-\u003elen;\ndiff --git a/net/xfrm/xfrm_nat_keepalive.c b/net/xfrm/xfrm_nat_keepalive.c\nindex 458931062a04ef..eb1b6f67739e1d 100644\n--- a/net/xfrm/xfrm_nat_keepalive.c\n+++ b/net/xfrm/xfrm_nat_keepalive.c\n@@ -55,8 +55,10 @@ static int nat_keepalive_send_ipv4(struct sk_buff *skb,\n \t\t\t   ka-\u003eencap_sport, sock_net_uid(net, NULL));\n \n \trt = ip_route_output_key(net, \u0026fl4);\n-\tif (IS_ERR(rt))\n+\tif (IS_ERR(rt)) {\n+\t\tkfree_skb(skb);\n \t\treturn PTR_ERR(rt);\n+\t}\n \n \tskb_dst_set(skb, \u0026rt-\u003edst);\n \n@@ -101,6 +103,7 @@ static int nat_keepalive_send_ipv6(struct sk_buff *skb,\n \tdst = ip6_dst_lookup_flow(net, sk, \u0026fl6, NULL);\n \tif (IS_ERR(dst)) {\n \t\tlocal_unlock_nested_bh(\u0026nat_keepalive_sk_ipv6.bh_lock);\n+\t\tkfree_skb(skb);\n \t\treturn PTR_ERR(dst);\n \t}\n \n@@ -118,7 +121,6 @@ static void nat_keepalive_send(struct nat_keepalive *ka)\n \t\t\t\t\tsizeof(struct ipv6hdr)) +\n \t\t\t\t    sizeof(struct udphdr);\n \tconst u8 nat_ka_payload = 0xFF;\n-\tint err = -EAFNOSUPPORT;\n \tstruct sk_buff *skb;\n \tstruct udphdr *uh;\n \n@@ -140,16 +142,17 @@ static void nat_keepalive_send(struct nat_keepalive *ka)\n \n \tswitch (ka-\u003efamily) {\n \tcase AF_INET:\n-\t\terr = nat_keepalive_send_ipv4(skb, ka);\n+\t\tnat_keepalive_send_ipv4(skb, ka);\n \t\tbreak;\n #if IS_ENABLED(CONFIG_IPV6)\n \tcase AF_INET6:\n-\t\terr = nat_keepalive_send_ipv6(skb, ka, uh);\n+\t\tnat_keepalive_send_ipv6(skb, ka, uh);\n \t\tbreak;\n #endif\n-\t}\n-\tif (err)\n+\tdefault:\n \t\tkfree_skb(skb);\n+\t\tbreak;\n+\t}\n }\n \n struct nat_keepalive_work_ctx {\ndiff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c\nindex 7ef861a0e8231b..932a313b9460a5 100644\n--- a/net/xfrm/xfrm_policy.c\n+++ b/net/xfrm/xfrm_policy.c\n@@ -1329,8 +1329,8 @@ static void xfrm_hash_rebuild(struct work_struct *work)\n \t\t\t}\n \t\t}\n \n-\t\tif (policy-\u003eselector.prefixlen_d \u003c dbits ||\n-\t\t    policy-\u003eselector.prefixlen_s \u003c sbits)\n+\t\tif (policy-\u003eselector.prefixlen_d \u003e= dbits \u0026\u0026\n+\t\t    policy-\u003eselector.prefixlen_s \u003e= sbits)\n \t\t\tcontinue;\n \n \t\tbin = xfrm_policy_inexact_alloc_bin(policy, dir);\ndiff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c\nindex c58cd024e3c675..36a4f6793edef2 100644\n--- a/net/xfrm/xfrm_state.c\n+++ b/net/xfrm/xfrm_state.c\n@@ -1547,6 +1547,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,\n \t\t\txso-\u003etype = XFRM_DEV_OFFLOAD_PACKET;\n \t\t\txso-\u003edir = xdo-\u003edir;\n \t\t\txso-\u003edev = dev;\n+\t\t\txso-\u003eifindex = dev-\u003eifindex;\n \t\t\txso-\u003eflags = XFRM_DEV_OFFLOAD_FLAG_ACQ;\n \t\t\tnetdev_hold(dev, \u0026xso-\u003edev_tracker, GFP_ATOMIC);\n \t\t\terror = dev-\u003exfrmdev_ops-\u003exdo_dev_state_add(dev, x,\n@@ -2071,8 +2072,11 @@ static struct xfrm_state *xfrm_state_clone_and_setup(struct xfrm_state *orig,\n \n \tx-\u003emode_cbs = orig-\u003emode_cbs;\n \tif (x-\u003emode_cbs \u0026\u0026 x-\u003emode_cbs-\u003eclone_state) {\n-\t\tif (x-\u003emode_cbs-\u003eclone_state(x, orig))\n+\t\tif (x-\u003emode_cbs-\u003eclone_state(x, orig)) {\n+\t\t\tif (!x-\u003emode_data)\n+\t\t\t\tx-\u003emode_cbs = NULL;\n \t\t\tgoto error;\n+\t\t}\n \t}\n \n \tx-\u003eprops.reqid = m-\u003enew_reqid;\n@@ -3010,7 +3014,7 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)\n \tif (sockptr_is_null(optval) \u0026\u0026 !optlen) {\n \t\txfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);\n \t\txfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);\n-\t\t__sk_dst_reset(sk);\n+\t\tsk_dst_reset(sk);\n \t\treturn 0;\n \t}\n \n@@ -3050,7 +3054,7 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)\n \tif (err \u003e= 0) {\n \t\txfrm_sk_policy_insert(sk, err, pol);\n \t\txfrm_pol_put(pol);\n-\t\t__sk_dst_reset(sk);\n+\t\tsk_dst_reset(sk);\n \t\terr = 0;\n \t}\n \n@@ -3291,6 +3295,8 @@ int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)\n \t\tif (x-\u003emode_cbs-\u003einit_state)\n \t\t\terr = x-\u003emode_cbs-\u003einit_state(x);\n \t\tmodule_put(x-\u003emode_cbs-\u003eowner);\n+\t\tif (err \u0026\u0026 !x-\u003emode_data)\n+\t\t\tx-\u003emode_cbs = NULL;\n \t}\n error:\n \treturn err;\ndiff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c\nindex 6384795ee6b269..d6db63304ba6bd 100644\n--- a/net/xfrm/xfrm_user.c\n+++ b/net/xfrm/xfrm_user.c\n@@ -1201,17 +1201,26 @@ static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)\n \treturn 0;\n }\n \n-static void xso_to_xuo(const struct xfrm_dev_offload *xso,\n-\t\t       struct xfrm_user_offload *xuo)\n+static void xso_to_xuo_ifindex(const struct xfrm_dev_offload *xso, int ifindex,\n+\t\t\t       struct xfrm_user_offload *xuo)\n {\n-\txuo-\u003eifindex = xso-\u003edev-\u003eifindex;\n+\txuo-\u003eifindex = ifindex;\n \tif (xso-\u003edir == XFRM_DEV_OFFLOAD_IN)\n \t\txuo-\u003eflags = XFRM_OFFLOAD_INBOUND;\n \tif (xso-\u003etype == XFRM_DEV_OFFLOAD_PACKET)\n \t\txuo-\u003eflags |= XFRM_OFFLOAD_PACKET;\n }\n \n-static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)\n+#ifdef CONFIG_XFRM_MIGRATE\n+static void xso_to_xuo(const struct xfrm_dev_offload *xso,\n+\t\t       struct xfrm_user_offload *xuo)\n+{\n+\txso_to_xuo_ifindex(xso, xso-\u003edev-\u003eifindex, xuo);\n+}\n+#endif\n+\n+static int copy_user_offload_ifindex(const struct xfrm_dev_offload *xso,\n+\t\t\t\t     int ifindex, struct sk_buff *skb)\n {\n \tstruct xfrm_user_offload *xuo;\n \tstruct nlattr *attr;\n@@ -1222,11 +1231,22 @@ static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)\n \n \txuo = nla_data(attr);\n \tmemset(xuo, 0, sizeof(*xuo));\n-\txso_to_xuo(xso, xuo);\n+\txso_to_xuo_ifindex(xso, ifindex, xuo);\n \n \treturn 0;\n }\n \n+static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)\n+{\n+\treturn copy_user_offload_ifindex(xso, xso-\u003edev-\u003eifindex, skb);\n+}\n+\n+static int copy_user_state_offload(const struct xfrm_dev_offload *xso,\n+\t\t\t\t   struct sk_buff *skb)\n+{\n+\treturn copy_user_offload_ifindex(xso, READ_ONCE(xso-\u003eifindex), skb);\n+}\n+\n static bool xfrm_redact(void)\n {\n \treturn IS_ENABLED(CONFIG_SECURITY) \u0026\u0026\n@@ -1433,8 +1453,8 @@ static int copy_to_user_state_extra(struct xfrm_state *x,\n \t\t\t      \u0026x-\u003ereplay);\n \tif (ret)\n \t\tgoto out;\n-\tif(x-\u003exso.dev)\n-\t\tret = copy_user_offload(\u0026x-\u003exso, skb);\n+\tif (READ_ONCE(x-\u003exso.dev))\n+\t\tret = copy_user_state_offload(\u0026x-\u003exso, skb);\n \tif (ret)\n \t\tgoto out;\n \tif (x-\u003eif_id) {\n@@ -2104,13 +2124,12 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,\n \t\tswitch (ut[i].mode) {\n \t\tcase XFRM_MODE_TUNNEL:\n \t\tcase XFRM_MODE_BEET:\n+\t\tcase XFRM_MODE_IPTFS:\n \t\t\tif (ut[i].optional \u0026\u0026 dir == XFRM_POLICY_OUT) {\n \t\t\t\tNL_SET_ERR_MSG(extack, \"Mode in optional template not allowed in outbound policy\");\n \t\t\t\treturn -EINVAL;\n \t\t\t}\n \t\t\tbreak;\n-\t\tcase XFRM_MODE_IPTFS:\n-\t\t\tbreak;\n \t\tdefault:\n \t\t\tif (ut[i].family != prev_family) {\n \t\t\t\tNL_SET_ERR_MSG(extack, \"Mode in template doesn't support a family change\");\n@@ -4046,8 +4065,8 @@ static inline unsigned int xfrm_sa_len(struct xfrm_state *x)\n \t\tl += nla_total_size(sizeof(*x-\u003ecoaddr));\n \tif (x-\u003eprops.extra_flags)\n \t\tl += nla_total_size(sizeof(x-\u003eprops.extra_flags));\n-\tif (x-\u003exso.dev)\n-\t\t l += nla_total_size(sizeof(struct xfrm_user_offload));\n+\tif (READ_ONCE(x-\u003exso.dev))\n+\t\tl += nla_total_size(sizeof(struct xfrm_user_offload));\n \tif (x-\u003eprops.smark.v | x-\u003eprops.smark.m) {\n \t\tl += nla_total_size(sizeof(x-\u003eprops.smark.v));\n \t\tl += nla_total_size(sizeof(x-\u003eprops.smark.m));\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": [
    "XFRM_USER",
    "XFRM_IPTFS",
    "XFRM_MIGRATE",
    "INET_ESP_OFFLOAD",
    "INET6_ESP_OFFLOAD"
  ],
  "FocusSymbols": [
    "validate_xmit_xfrm",
    "xfrm6_fill_dst",
    "xfrm_dev_state_add",
    "iptfs_skb_add_frags",
    "nat_keepalive_send",
    "xfrm_hash_rebuild",
    "xfrm_state_find",
    "xfrm_state_clone_and_setup",
    "xfrm_user_policy",
    "__xfrm_init_state",
    "validate_tmpl"
  ],
  "Reasoning": "The patch fixes multiple functional bugs in the XFRM (IPsec) subsystem, including memory leaks in NAT keepalive and IPv6 policy routing, incorrect handling of async crypto returns (-EINPROGRESS) during packet transmission, a prefix length check bug in hash rebuilding, use-after-free vulnerabilities during state initialization/cloning, and data races in user offload state copying. It also adds proper validation for IPTFS mode and fixes shared fragment handling in IPTFS. These are reachable core kernel logic changes that should be fuzzed.",
  "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 51711bcd2a66df64db451e56948d07788cea009f
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Jul 11 04:40:38 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 519a0156a05cac..a6d69aaa6cd2d0 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -162,6 +162,8 @@ struct xfrm_dev_offload {
 	 */
 	struct net_device	*real_dev;
 	unsigned long		offload_handle;
+	/* Snapshot the attached device index for dump paths. */
+	int			ifindex;
 	u8			dir : 2;
 	u8			type : 2;
 	u8			flags : 2;
diff --git a/net/core/dev.c b/net/core/dev.c
index 4b3d5cfdf6e00f..5933c5dab09ee1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4018,6 +4018,9 @@ static struct sk_buff *validate_xmit_unreadable_skb(struct sk_buff *skb,
 	return NULL;
 }
 
+/* Returns the skb on success, NULL if dropped, or ERR_PTR(-EINPROGRESS)
+ * if stolen by async xfrm crypto (delivered via xfrm_dev_resume()).
+ */
 static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device *dev, bool *again)
 {
 	netdev_features_t features;
@@ -4089,7 +4092,7 @@ struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *d
 		skb->prev = skb;
 
 		skb = validate_xmit_skb(skb, dev, again);
-		if (!skb)
+		if (IS_ERR_OR_NULL(skb))
 			continue;
 
 		if (!head)
@@ -4860,8 +4863,11 @@ int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)
 			goto recursion_alert;
 
 		skb = validate_xmit_skb(skb, dev, &again);
-		if (!skb)
+		if (IS_ERR_OR_NULL(skb)) {
+			if (PTR_ERR(skb) == -EINPROGRESS)
+				rc = NET_XMIT_SUCCESS;
 			goto out;
+		}
 
 		HARD_TX_LOCK(dev, txq, cpu);
 
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 125ea9a5b8a082..3b749475f6ed65 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -88,6 +88,7 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 	xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
 	if (!xdst->u.rt6.rt6i_idev) {
 		netdev_put(dev, &xdst->u.dst.dev_tracker);
+		xdst->u.dst.dev = NULL;
 		return -ENODEV;
 	}
 
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 630f3dd31cc5ce..f153bf695b9dd1 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -182,7 +182,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
 		err = x->type_offload->xmit(x, skb, esp_features);
 		if (err) {
 			if (err == -EINPROGRESS)
-				return NULL;
+				return ERR_PTR(-EINPROGRESS);
 
 			XFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR);
 			kfree_skb(skb);
@@ -224,7 +224,15 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
 		pskb = skb2;
 	}
 
-	return skb;
+	/* skb_gso_segment() set skb->prev to the last segment, but async
+	 * crypto may have stolen it above without updating ->prev.  Repoint
+	 * it at the last retained segment so validate_xmit_skb_list() does
+	 * not chain onto a segment now owned by the crypto engine.
+	 */
+	if (skb)
+		skb->prev = pskb;
+
+	return skb ? skb : ERR_PTR(-EINPROGRESS);
 }
 EXPORT_SYMBOL_GPL(validate_xmit_xfrm);
 
@@ -313,6 +321,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 	}
 
 	xso->dev = dev;
+	xso->ifindex = dev->ifindex;
 	netdev_tracker_alloc(dev, &xso->dev_tracker, GFP_ATOMIC);
 
 	if (xuo->flags & XFRM_OFFLOAD_INBOUND)
diff --git a/net/xfrm/xfrm_iptfs.c b/net/xfrm/xfrm_iptfs.c
index ad810d1f97c067..597aedeac26eba 100644
--- a/net/xfrm/xfrm_iptfs.c
+++ b/net/xfrm/xfrm_iptfs.c
@@ -480,6 +480,7 @@ static int iptfs_skb_add_frags(struct sk_buff *skb,
 		}
 		__skb_frag_ref(tofrag);
 		shinfo->nr_frags++;
+		shinfo->flags |= SKBFL_SHARED_FRAG;
 
 		/* see if we are done */
 		fraglen = tofrag->len;
diff --git a/net/xfrm/xfrm_nat_keepalive.c b/net/xfrm/xfrm_nat_keepalive.c
index 458931062a04ef..eb1b6f67739e1d 100644
--- a/net/xfrm/xfrm_nat_keepalive.c
+++ b/net/xfrm/xfrm_nat_keepalive.c
@@ -55,8 +55,10 @@ static int nat_keepalive_send_ipv4(struct sk_buff *skb,
 			   ka->encap_sport, sock_net_uid(net, NULL));
 
 	rt = ip_route_output_key(net, &fl4);
-	if (IS_ERR(rt))
+	if (IS_ERR(rt)) {
+		kfree_skb(skb);
 		return PTR_ERR(rt);
+	}
 
 	skb_dst_set(skb, &rt->dst);
 
@@ -101,6 +103,7 @@ static int nat_keepalive_send_ipv6(struct sk_buff *skb,
 	dst = ip6_dst_lookup_flow(net, sk, &fl6, NULL);
 	if (IS_ERR(dst)) {
 		local_unlock_nested_bh(&nat_keepalive_sk_ipv6.bh_lock);
+		kfree_skb(skb);
 		return PTR_ERR(dst);
 	}
 
@@ -118,7 +121,6 @@ static void nat_keepalive_send(struct nat_keepalive *ka)
 					sizeof(struct ipv6hdr)) +
 				    sizeof(struct udphdr);
 	const u8 nat_ka_payload = 0xFF;
-	int err = -EAFNOSUPPORT;
 	struct sk_buff *skb;
 	struct udphdr *uh;
 
@@ -140,16 +142,17 @@ static void nat_keepalive_send(struct nat_keepalive *ka)
 
 	switch (ka->family) {
 	case AF_INET:
-		err = nat_keepalive_send_ipv4(skb, ka);
+		nat_keepalive_send_ipv4(skb, ka);
 		break;
 #if IS_ENABLED(CONFIG_IPV6)
 	case AF_INET6:
-		err = nat_keepalive_send_ipv6(skb, ka, uh);
+		nat_keepalive_send_ipv6(skb, ka, uh);
 		break;
 #endif
-	}
-	if (err)
+	default:
 		kfree_skb(skb);
+		break;
+	}
 }
 
 struct nat_keepalive_work_ctx {
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 7ef861a0e8231b..932a313b9460a5 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1329,8 +1329,8 @@ static void xfrm_hash_rebuild(struct work_struct *work)
 			}
 		}
 
-		if (policy->selector.prefixlen_d < dbits ||
-		    policy->selector.prefixlen_s < sbits)
+		if (policy->selector.prefixlen_d >= dbits &&
+		    policy->selector.prefixlen_s >= sbits)
 			continue;
 
 		bin = xfrm_policy_inexact_alloc_bin(policy, dir);
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index c58cd024e3c675..36a4f6793edef2 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1547,6 +1547,7 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
 			xso->type = XFRM_DEV_OFFLOAD_PACKET;
 			xso->dir = xdo->dir;
 			xso->dev = dev;
+			xso->ifindex = dev->ifindex;
 			xso->flags = XFRM_DEV_OFFLOAD_FLAG_ACQ;
 			netdev_hold(dev, &xso->dev_tracker, GFP_ATOMIC);
 			error = dev->xfrmdev_ops->xdo_dev_state_add(dev, x,
@@ -2071,8 +2072,11 @@ static struct xfrm_state *xfrm_state_clone_and_setup(struct xfrm_state *orig,
 
 	x->mode_cbs = orig->mode_cbs;
 	if (x->mode_cbs && x->mode_cbs->clone_state) {
-		if (x->mode_cbs->clone_state(x, orig))
+		if (x->mode_cbs->clone_state(x, orig)) {
+			if (!x->mode_data)
+				x->mode_cbs = NULL;
 			goto error;
+		}
 	}
 
 	x->props.reqid = m->new_reqid;
@@ -3010,7 +3014,7 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
 	if (sockptr_is_null(optval) && !optlen) {
 		xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
 		xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
-		__sk_dst_reset(sk);
+		sk_dst_reset(sk);
 		return 0;
 	}
 
@@ -3050,7 +3054,7 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
 	if (err >= 0) {
 		xfrm_sk_policy_insert(sk, err, pol);
 		xfrm_pol_put(pol);
-		__sk_dst_reset(sk);
+		sk_dst_reset(sk);
 		err = 0;
 	}
 
@@ -3291,6 +3295,8 @@ int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack)
 		if (x->mode_cbs->init_state)
 			err = x->mode_cbs->init_state(x);
 		module_put(x->mode_cbs->owner);
+		if (err && !x->mode_data)
+			x->mode_cbs = NULL;
 	}
 error:
 	return err;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 6384795ee6b269..d6db63304ba6bd 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1201,17 +1201,26 @@ static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
 	return 0;
 }
 
-static void xso_to_xuo(const struct xfrm_dev_offload *xso,
-		       struct xfrm_user_offload *xuo)
+static void xso_to_xuo_ifindex(const struct xfrm_dev_offload *xso, int ifindex,
+			       struct xfrm_user_offload *xuo)
 {
-	xuo->ifindex = xso->dev->ifindex;
+	xuo->ifindex = ifindex;
 	if (xso->dir == XFRM_DEV_OFFLOAD_IN)
 		xuo->flags = XFRM_OFFLOAD_INBOUND;
 	if (xso->type == XFRM_DEV_OFFLOAD_PACKET)
 		xuo->flags |= XFRM_OFFLOAD_PACKET;
 }
 
-static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
+#ifdef CONFIG_XFRM_MIGRATE
+static void xso_to_xuo(const struct xfrm_dev_offload *xso,
+		       struct xfrm_user_offload *xuo)
+{
+	xso_to_xuo_ifindex(xso, xso->dev->ifindex, xuo);
+}
+#endif
+
+static int copy_user_offload_ifindex(const struct xfrm_dev_offload *xso,
+				     int ifindex, struct sk_buff *skb)
 {
 	struct xfrm_user_offload *xuo;
 	struct nlattr *attr;
@@ -1222,11 +1231,22 @@ static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
 
 	xuo = nla_data(attr);
 	memset(xuo, 0, sizeof(*xuo));
-	xso_to_xuo(xso, xuo);
+	xso_to_xuo_ifindex(xso, ifindex, xuo);
 
 	return 0;
 }
 
+static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
+{
+	return copy_user_offload_ifindex(xso, xso->dev->ifindex, skb);
+}
+
+static int copy_user_state_offload(const struct xfrm_dev_offload *xso,
+				   struct sk_buff *skb)
+{
+	return copy_user_offload_ifindex(xso, READ_ONCE(xso->ifindex), skb);
+}
+
 static bool xfrm_redact(void)
 {
 	return IS_ENABLED(CONFIG_SECURITY) &&
@@ -1433,8 +1453,8 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
 			      &x->replay);
 	if (ret)
 		goto out;
-	if(x->xso.dev)
-		ret = copy_user_offload(&x->xso, skb);
+	if (READ_ONCE(x->xso.dev))
+		ret = copy_user_state_offload(&x->xso, skb);
 	if (ret)
 		goto out;
 	if (x->if_id) {
@@ -2104,13 +2124,12 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
 		switch (ut[i].mode) {
 		case XFRM_MODE_TUNNEL:
 		case XFRM_MODE_BEET:
+		case XFRM_MODE_IPTFS:
 			if (ut[i].optional && dir == XFRM_POLICY_OUT) {
 				NL_SET_ERR_MSG(extack, "Mode in optional template not allowed in outbound policy");
 				return -EINVAL;
 			}
 			break;
-		case XFRM_MODE_IPTFS:
-			break;
 		default:
 			if (ut[i].family != prev_family) {
 				NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
@@ -4046,8 +4065,8 @@ static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
 		l += nla_total_size(sizeof(*x->coaddr));
 	if (x->props.extra_flags)
 		l += nla_total_size(sizeof(x->props.extra_flags));
-	if (x->xso.dev)
-		 l += nla_total_size(sizeof(struct xfrm_user_offload));
+	if (READ_ONCE(x->xso.dev))
+		l += nla_total_size(sizeof(struct xfrm_user_offload));
 	if (x->props.smark.v | x->props.smark.m) {
 		l += nla_total_size(sizeof(x->props.smark.v));
 		l += nla_total_size(sizeof(x->props.smark.m));

gemini-3.1-pro-preview

null

null

							input: 6574
							output: 23
							thoughts: 694
						

**Analyzing and Refining the XFRM (IPsec) Subsystem Patch Series**

Okay, so I'm looking at this patch series targeting the XFRM subsystem, and immediately I'm noticing a good mix of functional changes and important fixes, which is exactly what I'd expect when dealing with a core network security component.

First, the `xfrm_dev_offload` struct gets a new `ifindex` field in `include/net/xfrm.h`. This likely aims to improve interface identification within the offload path. Makes sense; if we're offloading, we need to know where the traffic originates or is destined.

Diving into `net/core/dev.c`, I see error handling for `ERR_PTR(-EINPROGRESS)` from `validate_xmit_skb`. This is good; it shows a thoughtful approach to dealing with asynchronous operations. I'm glad to see that handled in `validate_xmit_skb_list` and `__dev_queue_xmit`, because those are critical functions.

In `net/ipv6/xfrm6_policy.c`, setting `xdst->u.dst.dev = NULL` in `xfrm6_fill_dst` might seem minor, but it's probably a crucial edge case cleanup to prevent any potential misuse of dangling pointers. A subtle, but vital, correction.

`net/xfrm/xfrm_device.c` has a few interesting changes. Returning `ERR_PTR(-EINPROGRESS)` from `validate_xmit_xfrm` is consistent with the error handling in `dev.c`, so I'm happy to see that consistency. The fix for `skb->prev` when async crypto steals the SKB is important. I need to understand that logic better - async crypto interactions can be tricky, so it's good to see this addressed directly. The `xso->ifindex = dev->ifindex` assignment in `xfrm_dev_state_add` and `xfrm_state_find` are also critical updates to link interface index to state information.

`net/xfrm/xfrm_iptfs.c` adds `shinfo->flags |= SKBFL_SHARED_FRAG` in `iptfs_skb_add_frags`. This looks like optimization, or perhaps a requirement, to correctly handle shared fragments within IPTFS. Another good, focused change.

In `net/xfrm/xfrm_nat_keepalive.c`, the memory leak fixes in `nat_keepalive_send_ipv4`, `nat_keepalive_send_ipv6`, and `nat_keepalive_send` by calling `kfree_skb(skb)` on error paths are *essential*. Memory leaks are unacceptable, especially in a network component, so kudos to that.

The change in `net/xfrm/xfrm_policy.c` with the prefixlen check in `xfrm_hash_rebuild` ( `<` to `>=`) is a classic logic bug. These are the kinds of errors that can cause all sorts of obscure network misbehavior, so it's a good spot to have caught that.

`net/xfrm/xfrm_state.c` also addresses interface indexes and error handling: setting `xso->ifindex = dev->ifindex` in `xfrm_state_find` and setting `x->mode_cbs = NULL` on error in `xfrm_state_clone_and_setup` and `__xfrm_init_state`. Setting `x->mode_cbs = NULL` on error helps with the error handling, and using `sk_dst_reset(sk)` instead of `__sk_dst_reset(sk)` in `xfrm_user_policy` is likely a change for consistency with other parts of the kernel, potentially in response to some locking changes.

Finally, `net/xfrm/xfrm_user.c` uses `READ_ONCE(xso->ifindex)` and `READ_ONCE(x->xso.dev)` to eliminate data races. This is a very welcome improvement in ensuring safe concurrent access to shared data. Moving `XFRM_MODE_IPTFS` in `validate_tmpl` makes the code more readable by grouping related functionality.

Before I go further, I should verify the configuration options involved. I know `CONFIG_XFRM` enables the core functionality, `CONFIG_XFRM_IPTFS` enables `XFRM_IPTFS`, and `CONFIG_XFRM_USER` enables `XFRM_USER`. I'll confirm how `XFRM_NAT` is enabled. Let me check the Kconfig in `net/xfrm/xfrm_nat_keepalive.c`.

{
  "Expression": "xfrm_nat_keepalive.o"
}

{
  "Output": "net/xfrm/Makefile=14=obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \\\n--\nnet/xfrm/Makefile-16-\t\t      xfrm_sysctl.o xfrm_replay.o xfrm_device.o \\\nnet/xfrm/Makefile:17:\t\t      xfrm_nat_keepalive.o\nnet/xfrm/Makefile-18-obj-$(CONFIG_XFRM_STATISTICS) += xfrm_proc.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 8454
							output: 21
							thoughts: 39
						

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

**Investigating XFRM Modules**

Right, so `xfrm_nat_keepalive.o` is definitely built and included when the `CONFIG_XFRM` configuration option is enabled. That's straightforward and makes perfect sense. Now, my immediate question is... what about `xfrm_iptfs.o`? I need to quickly recall the dependencies and build conditions for that particular module. Is it also tied directly to `CONFIG_XFRM`? Or does it depend on further, more specific sub-options within the XFRM framework, perhaps related to IPsec transport security or firewall integration? Understanding that relationship will be key for knowing when and where to expect its presence in a kernel build. Let's see... I bet I can find the answer quickly by checking the Kconfig file for the XFRM subsystem.

{
  "Expression": "xfrm_iptfs.o"
}

{
  "Output": "net/xfrm/Makefile=23=obj-$(CONFIG_XFRM_INTERFACE) += xfrm_interface.o\nnet/xfrm/Makefile:24:obj-$(CONFIG_XFRM_IPTFS) += xfrm_iptfs.o\nnet/xfrm/Makefile-25-obj-$(CONFIG_XFRM_ESPINTCP) += espintcp.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 8813
							output: 20
							thoughts: 36
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**XFRM IPTFS Dependency Confirmation**

Alright, the need for `CONFIG_XFRM_IPTFS` is definitely coming into focus. Now I need to confirm its presence and understand its context within the broader `xfrm` architecture. My next step is to drill down into the kernel source, specifically `net/xfrm/xfrm_device.c`. This file often holds the key dependencies and initialization routines related to XFRM devices, and the Kconfig dependencies should be laid out there. I'll quickly check the Kconfig directives within `xfrm_device.c` to verify that `CONFIG_XFRM_IPTFS` is indeed a hard requirement, or at least a highly recommended option for this particular functionality. This is a critical point to ensure the build environment is set up correctly and the module will function as intended. I'm expecting to find direct dependencies or conditional compilation paths that make this connection clear.

{
  "Expression": "xfrm_device.o"
}

{
  "Output": "net/xfrm/Makefile=14=obj-$(CONFIG_XFRM) := xfrm_policy.o xfrm_state.o xfrm_hash.o \\\nnet/xfrm/Makefile-15-\t\t      xfrm_input.o xfrm_output.o \\\nnet/xfrm/Makefile:16:\t\t      xfrm_sysctl.o xfrm_replay.o xfrm_device.o \\\nnet/xfrm/Makefile-17-\t\t      xfrm_nat_keepalive.o\n"
}

gemini-3.1-pro-preview

null

null

							input: 9215
							output: 20
							thoughts: 30
						

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

**Diving into the XFRM Kernel Code**

Right, so this is definitely built with `CONFIG_XFRM` enabled. That narrows things down considerably. Given that, my gut tells me we need to look into the user-space interaction. The most likely area to find the relevant code would be within `net/xfrm/xfrm_user.c`. Let's start there; that's where the magic happens between user-space configuration and the kernel's XFRM subsystem. I'll need to understand how the user-space components are interacting with the kernel-side structures, so I can understand the bigger picture here.

{
  "Expression": "xfrm_user.o"
}

{
  "Output": "Documentation/networking/xfrm/xfrm_migrate_state.rst=65=inherits the value from the existing SA (omit-to-inherit).\n--\nDocumentation/networking/xfrm/xfrm_migrate_state.rst-80-   * - ``XFRMA_OFFLOAD_DEV``\nDocumentation/networking/xfrm/xfrm_migrate_state.rst:81:     - Hardware offload configuration (``struct xfrm_user_offload``). Absent\nDocumentation/networking/xfrm/xfrm_migrate_state.rst-82-       copies offload from the existing SA. When\n--\ninclude/net/xfrm.h=682=struct xfrm_migrate {\n--\ninclude/net/xfrm.h-687-\tstruct xfrm_encap_tmpl *encap;\ninclude/net/xfrm.h:688:\tstruct xfrm_user_offload *xuo;\ninclude/net/xfrm.h-689-\tstruct xfrm_mark        old_mark;\n--\ninclude/net/xfrm.h=1930=int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,\n--\ninclude/net/xfrm.h-1934-\t\t struct netlink_ext_ack *extack,\ninclude/net/xfrm.h:1935:\t\t struct xfrm_user_offload *xuo);\ninclude/net/xfrm.h-1936-#endif\n--\ninclude/net/xfrm.h=2124=int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,\ninclude/net/xfrm.h:2125:\t\t       const struct xfrm_user_offload *xuo,\ninclude/net/xfrm.h-2126-\t\t       struct netlink_ext_ack *extack);\ninclude/net/xfrm.h=2127=int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,\ninclude/net/xfrm.h:2128:\t\t\tstruct xfrm_user_offload *xuo, u8 dir,\ninclude/net/xfrm.h-2129-\t\t\tstruct netlink_ext_ack *extack);\n--\ninclude/net/xfrm.h=2196=static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,\ninclude/net/xfrm.h:2197:\t\t\t\t     const struct xfrm_user_offload *xuo,\ninclude/net/xfrm.h-2198-\t\t\t\t     struct netlink_ext_ack *extack)\n--\ninclude/net/xfrm.h=2211=static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,\ninclude/net/xfrm.h:2212:\t\t\t\t      struct xfrm_user_offload *xuo, u8 dir,\ninclude/net/xfrm.h-2213-\t\t\t\t      struct netlink_ext_ack *extack)\n--\ninclude/uapi/linux/xfrm.h=272=enum xfrm_ae_ftype_t {\n--\ninclude/uapi/linux/xfrm.h-285-\ninclude/uapi/linux/xfrm.h:286:struct xfrm_userpolicy_type {\ninclude/uapi/linux/xfrm.h-287-\t__u8\t\ttype;\n--\ninclude/uapi/linux/xfrm.h=293=enum xfrm_attr_type_t {\n--\ninclude/uapi/linux/xfrm.h-300-\tXFRMA_SA,\t\t/* struct xfrm_usersa_info  */\ninclude/uapi/linux/xfrm.h:301:\tXFRMA_POLICY,\t\t/*struct xfrm_userpolicy_info */\ninclude/uapi/linux/xfrm.h-302-\tXFRMA_SEC_CTX,\t\t/* struct xfrm_sec_ctx */\n--\ninclude/uapi/linux/xfrm.h-309-\tXFRMA_LASTUSED,\t\t/* __u64 */\ninclude/uapi/linux/xfrm.h:310:\tXFRMA_POLICY_TYPE,\t/* struct xfrm_userpolicy_type */\ninclude/uapi/linux/xfrm.h-311-\tXFRMA_MIGRATE,\n--\ninclude/uapi/linux/xfrm.h-321-\tXFRMA_PAD,\ninclude/uapi/linux/xfrm.h:322:\tXFRMA_OFFLOAD_DEV,\t/* struct xfrm_user_offload */\ninclude/uapi/linux/xfrm.h-323-\tXFRMA_SET_MARK,\t\t/* __u32 */\n--\ninclude/uapi/linux/xfrm.h=431=struct xfrm_userspi_info {\n--\ninclude/uapi/linux/xfrm.h-436-\ninclude/uapi/linux/xfrm.h:437:struct xfrm_userpolicy_info {\ninclude/uapi/linux/xfrm.h-438-\tstruct xfrm_selector\t\tsel;\n--\ninclude/uapi/linux/xfrm.h-454-\ninclude/uapi/linux/xfrm.h:455:struct xfrm_userpolicy_id {\ninclude/uapi/linux/xfrm.h-456-\tstruct xfrm_selector\t\tsel;\n--\ninclude/uapi/linux/xfrm.h=461=struct xfrm_user_acquire {\n--\ninclude/uapi/linux/xfrm.h-464-\tstruct xfrm_selector\t\tsel;\ninclude/uapi/linux/xfrm.h:465:\tstruct xfrm_userpolicy_info\tpolicy;\ninclude/uapi/linux/xfrm.h-466-\t__u32\t\t\t\taalgos;\n--\ninclude/uapi/linux/xfrm.h=477=struct xfrm_user_polexpire {\ninclude/uapi/linux/xfrm.h:478:\tstruct xfrm_userpolicy_info\tpol;\ninclude/uapi/linux/xfrm.h-479-\t__u8\t\t\t\thard;\n--\ninclude/uapi/linux/xfrm.h=544=struct xfrm_address_filter {\n--\ninclude/uapi/linux/xfrm.h-551-\ninclude/uapi/linux/xfrm.h:552:struct xfrm_user_offload {\ninclude/uapi/linux/xfrm.h-553-\tint\t\t\t\tifindex;\n--\ninclude/uapi/linux/xfrm.h-570-\ninclude/uapi/linux/xfrm.h:571:struct xfrm_userpolicy_default {\ninclude/uapi/linux/xfrm.h-572-#define XFRM_USERPOLICY_UNSPEC\t0\n--\nnet/xfrm/Makefile=19=obj-$(CONFIG_XFRM_ALGO) += xfrm_algo.o\nnet/xfrm/Makefile:20:obj-$(CONFIG_XFRM_USER) += xfrm_user.o\nnet/xfrm/Makefile-21-obj-$(CONFIG_XFRM_USER_COMPAT) += xfrm_compat.o\n--\nnet/xfrm/xfrm_compat.c=19=struct compat_xfrm_lifetime_cur {\n--\nnet/xfrm/xfrm_compat.c-22-\nnet/xfrm/xfrm_compat.c:23:struct compat_xfrm_userpolicy_info {\nnet/xfrm/xfrm_compat.c-24-\tstruct xfrm_selector sel;\n--\nnet/xfrm/xfrm_compat.c=45=struct compat_xfrm_user_acquire {\n--\nnet/xfrm/xfrm_compat.c-48-\tstruct xfrm_selector sel;\nnet/xfrm/xfrm_compat.c:49:\tstruct compat_xfrm_userpolicy_info policy;\nnet/xfrm/xfrm_compat.c-50-\t/* 4 bytes additional padding on 64bit */\n--\nnet/xfrm/xfrm_compat.c=66=struct compat_xfrm_user_polexpire {\nnet/xfrm/xfrm_compat.c:67:\tstruct compat_xfrm_userpolicy_info pol;\nnet/xfrm/xfrm_compat.c-68-\t/* 8 bytes additional padding on 64bit */\n--\nnet/xfrm/xfrm_compat.c=74=static const int compat_msg_min[XFRM_NR_MSGTYPES] = {\n--\nnet/xfrm/xfrm_compat.c-77-\t[XFRM_MSG_GETSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),\nnet/xfrm/xfrm_compat.c:78:\t[XFRM_MSG_NEWPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(compat_xfrm_userpolicy_info),\nnet/xfrm/xfrm_compat.c:79:\t[XFRM_MSG_DELPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_compat.c:80:\t[XFRM_MSG_GETPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_compat.c-81-\t[XFRM_MSG_ALLOCSPI    - XFRM_MSG_BASE] = XMSGSIZE(compat_xfrm_userspi_info),\n--\nnet/xfrm/xfrm_compat.c-83-\t[XFRM_MSG_EXPIRE      - XFRM_MSG_BASE] = XMSGSIZE(compat_xfrm_user_expire),\nnet/xfrm/xfrm_compat.c:84:\t[XFRM_MSG_UPDPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(compat_xfrm_userpolicy_info),\nnet/xfrm/xfrm_compat.c-85-\t[XFRM_MSG_UPDSA       - XFRM_MSG_BASE] = XMSGSIZE(compat_xfrm_usersa_info),\n--\nnet/xfrm/xfrm_compat.c-91-\t[XFRM_MSG_REPORT      - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),\nnet/xfrm/xfrm_compat.c:92:\t[XFRM_MSG_MIGRATE     - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_compat.c-93-\t[XFRM_MSG_NEWSADINFO  - XFRM_MSG_BASE] = sizeof(u32),\n--\nnet/xfrm/xfrm_compat.c=101=static const struct nla_policy compat_policy[XFRMA_MAX+1] = {\n--\nnet/xfrm/xfrm_compat.c-103-\t[XFRMA_SA]\t\t= { .len = XMSGSIZE(compat_xfrm_usersa_info)},\nnet/xfrm/xfrm_compat.c:104:\t[XFRMA_POLICY]\t\t= { .len = XMSGSIZE(compat_xfrm_userpolicy_info)},\nnet/xfrm/xfrm_compat.c-105-\t[XFRMA_LASTUSED]\t= { .type = NLA_U64},\n--\nnet/xfrm/xfrm_compat.c-119-\t[XFRMA_COADDR]\t\t= { .len = sizeof(xfrm_address_t) },\nnet/xfrm/xfrm_compat.c:120:\t[XFRMA_POLICY_TYPE]\t= { .len = sizeof(struct xfrm_userpolicy_type)},\nnet/xfrm/xfrm_compat.c-121-\t[XFRMA_MIGRATE]\t\t= { .len = sizeof(struct xfrm_user_migrate) },\n--\nnet/xfrm/xfrm_compat.c-128-\t[XFRMA_ADDRESS_FILTER]\t= { .len = sizeof(struct xfrm_address_filter) },\nnet/xfrm/xfrm_compat.c:129:\t[XFRMA_OFFLOAD_DEV]\t= { .len = sizeof(struct xfrm_user_offload) },\nnet/xfrm/xfrm_compat.c-130-\t[XFRMA_SET_MARK]\t= { .type = NLA_U32 },\n--\nnet/xfrm/xfrm_compat.c=239=static int xfrm_xlate64_attr(struct sk_buff *dst, const struct nlattr *src)\n--\nnet/xfrm/xfrm_compat.c-254-\tcase XFRMA_POLICY:\nnet/xfrm/xfrm_compat.c:255:\t\treturn xfrm_nla_cpy(dst, src, XMSGSIZE(compat_xfrm_userpolicy_info));\nnet/xfrm/xfrm_compat.c-256-\tcase XFRMA_SEC_CTX:\n--\nnet/xfrm/xfrm_compat.c=645=static int xfrm_user_policy_compat(u8 **pdata32, int optlen)\nnet/xfrm/xfrm_compat.c-646-{\nnet/xfrm/xfrm_compat.c:647:\tstruct compat_xfrm_userpolicy_info *p = (void *)*pdata32;\nnet/xfrm/xfrm_compat.c-648-\tu8 *src_templates, *dst_templates;\n--\nnet/xfrm/xfrm_device.c=239=int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,\nnet/xfrm/xfrm_device.c:240:\t\t       const struct xfrm_user_offload *xuo,\nnet/xfrm/xfrm_device.c-241-\t\t       struct netlink_ext_ack *extack)\n--\nnet/xfrm/xfrm_device.c=359=int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,\nnet/xfrm/xfrm_device.c:360:\t\t\tstruct xfrm_user_offload *xuo, u8 dir,\nnet/xfrm/xfrm_device.c-361-\t\t\tstruct netlink_ext_ack *extack)\n--\nnet/xfrm/xfrm_policy.c=4656=int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,\n--\nnet/xfrm/xfrm_policy.c-4659-\t\t struct xfrm_encap_tmpl *encap, u32 if_id,\nnet/xfrm/xfrm_policy.c:4660:\t\t struct netlink_ext_ack *extack, struct xfrm_user_offload *xuo)\nnet/xfrm/xfrm_policy.c-4661-{\n--\nnet/xfrm/xfrm_user.c=1204=static void xso_to_xuo_ifindex(const struct xfrm_dev_offload *xso, int ifindex,\nnet/xfrm/xfrm_user.c:1205:\t\t\t       struct xfrm_user_offload *xuo)\nnet/xfrm/xfrm_user.c-1206-{\n--\nnet/xfrm/xfrm_user.c=1215=static void xso_to_xuo(const struct xfrm_dev_offload *xso,\nnet/xfrm/xfrm_user.c:1216:\t\t       struct xfrm_user_offload *xuo)\nnet/xfrm/xfrm_user.c-1217-{\n--\nnet/xfrm/xfrm_user.c=1222=static int copy_user_offload_ifindex(const struct xfrm_dev_offload *xso,\n--\nnet/xfrm/xfrm_user.c-1224-{\nnet/xfrm/xfrm_user.c:1225:\tstruct xfrm_user_offload *xuo;\nnet/xfrm/xfrm_user.c-1226-\tstruct nlattr *attr;\n--\nnet/xfrm/xfrm_user.c=1981=static int verify_policy_type(u8 type, struct netlink_ext_ack *extack)\n--\nnet/xfrm/xfrm_user.c-1997-\nnet/xfrm/xfrm_user.c:1998:static int verify_newpolicy_info(struct xfrm_userpolicy_info *p,\nnet/xfrm/xfrm_user.c-1999-\t\t\t\t struct netlink_ext_ack *extack)\n--\nnet/xfrm/xfrm_user.c=2189=static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs,\n--\nnet/xfrm/xfrm_user.c-2192-\tstruct nlattr *rt = attrs[XFRMA_POLICY_TYPE];\nnet/xfrm/xfrm_user.c:2193:\tstruct xfrm_userpolicy_type *upt;\nnet/xfrm/xfrm_user.c-2194-\tu8 type = XFRM_POLICY_TYPE_MAIN;\n--\nnet/xfrm/xfrm_user.c-2209-\nnet/xfrm/xfrm_user.c:2210:static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)\nnet/xfrm/xfrm_user.c-2211-{\n--\nnet/xfrm/xfrm_user.c-2221-\nnet/xfrm/xfrm_user.c:2222:static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)\nnet/xfrm/xfrm_user.c-2223-{\n--\nnet/xfrm/xfrm_user.c=2237=static struct xfrm_policy *xfrm_policy_construct(struct net *net,\nnet/xfrm/xfrm_user.c:2238:\t\t\t\t\t\t struct xfrm_userpolicy_info *p,\nnet/xfrm/xfrm_user.c-2239-\t\t\t\t\t\t struct nlattr **attrs,\n--\nnet/xfrm/xfrm_user.c=2284=static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-2288-\tstruct net *net = sock_net(skb-\u003esk);\nnet/xfrm/xfrm_user.c:2289:\tstruct xfrm_userpolicy_info *p = nlmsg_data(nlh);\nnet/xfrm/xfrm_user.c-2290-\tstruct xfrm_policy *xp;\n--\nnet/xfrm/xfrm_user.c=2377=static inline unsigned int userpolicy_type_attrsize(void)\n--\nnet/xfrm/xfrm_user.c-2379-#ifdef CONFIG_XFRM_SUB_POLICY\nnet/xfrm/xfrm_user.c:2380:\treturn nla_total_size(sizeof(struct xfrm_userpolicy_type));\nnet/xfrm/xfrm_user.c-2381-#else\n--\nnet/xfrm/xfrm_user.c=2387=static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)\nnet/xfrm/xfrm_user.c-2388-{\nnet/xfrm/xfrm_user.c:2389:\tstruct xfrm_userpolicy_type upt;\nnet/xfrm/xfrm_user.c-2390-\nnet/xfrm/xfrm_user.c:2391:\t/* Sadly there are two holes in struct xfrm_userpolicy_type */\nnet/xfrm/xfrm_user.c-2392-\tmemset(\u0026upt, 0, sizeof(upt));\n--\nnet/xfrm/xfrm_user.c=2405=static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)\n--\nnet/xfrm/xfrm_user.c-2407-\tstruct xfrm_dump_info *sp = ptr;\nnet/xfrm/xfrm_user.c:2408:\tstruct xfrm_userpolicy_info *p;\nnet/xfrm/xfrm_user.c-2409-\tstruct sk_buff *in_skb = sp-\u003ein_skb;\n--\nnet/xfrm/xfrm_user.c=2514=static int xfrm_notify_userpolicy(struct net *net)\nnet/xfrm/xfrm_user.c-2515-{\nnet/xfrm/xfrm_user.c:2516:\tstruct xfrm_userpolicy_default *up;\nnet/xfrm/xfrm_user.c-2517-\tint len = NLMSG_ALIGN(sizeof(*up));\n--\nnet/xfrm/xfrm_user.c-2545-\nnet/xfrm/xfrm_user.c:2546:static bool xfrm_userpolicy_is_valid(__u8 policy)\nnet/xfrm/xfrm_user.c-2547-{\n--\nnet/xfrm/xfrm_user.c=2552=static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-2555-\tstruct net *net = sock_net(skb-\u003esk);\nnet/xfrm/xfrm_user.c:2556:\tstruct xfrm_userpolicy_default *up = nlmsg_data(nlh);\nnet/xfrm/xfrm_user.c-2557-\nnet/xfrm/xfrm_user.c:2558:\tif (xfrm_userpolicy_is_valid(up-\u003ein))\nnet/xfrm/xfrm_user.c-2559-\t\tWRITE_ONCE(net-\u003exfrm.policy_default[XFRM_POLICY_IN], up-\u003ein);\nnet/xfrm/xfrm_user.c-2560-\nnet/xfrm/xfrm_user.c:2561:\tif (xfrm_userpolicy_is_valid(up-\u003efwd))\nnet/xfrm/xfrm_user.c-2562-\t\tWRITE_ONCE(net-\u003exfrm.policy_default[XFRM_POLICY_FWD], up-\u003efwd);\nnet/xfrm/xfrm_user.c-2563-\nnet/xfrm/xfrm_user.c:2564:\tif (xfrm_userpolicy_is_valid(up-\u003eout))\nnet/xfrm/xfrm_user.c-2565-\t\tWRITE_ONCE(net-\u003exfrm.policy_default[XFRM_POLICY_OUT], up-\u003eout);\n--\nnet/xfrm/xfrm_user.c=2573=static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-2578-\tstruct net *net = sock_net(skb-\u003esk);\nnet/xfrm/xfrm_user.c:2579:\tstruct xfrm_userpolicy_default *r_up;\nnet/xfrm/xfrm_user.c:2580:\tint len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));\nnet/xfrm/xfrm_user.c-2581-\tu32 portid = NETLINK_CB(skb).portid;\n--\nnet/xfrm/xfrm_user.c=2603=static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-2608-\tstruct xfrm_policy *xp;\nnet/xfrm/xfrm_user.c:2609:\tstruct xfrm_userpolicy_id *p;\nnet/xfrm/xfrm_user.c-2610-\tu8 type = XFRM_POLICY_TYPE_MAIN;\n--\nnet/xfrm/xfrm_user.c=2937=static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-2943-\tstruct xfrm_user_polexpire *up = nlmsg_data(nlh);\nnet/xfrm/xfrm_user.c:2944:\tstruct xfrm_userpolicy_info *p = \u0026up-\u003epol;\nnet/xfrm/xfrm_user.c-2945-\tu8 type = XFRM_POLICY_TYPE_MAIN;\n--\nnet/xfrm/xfrm_user.c=3183=static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-3185-{\nnet/xfrm/xfrm_user.c:3186:\tstruct xfrm_userpolicy_id *pi = nlmsg_data(nlh);\nnet/xfrm/xfrm_user.c-3187-\tstruct xfrm_migrate m[XFRM_MAX_DEPTH] = {};\n--\nnet/xfrm/xfrm_user.c-3193-\tstruct xfrm_encap_tmpl  *encap = NULL;\nnet/xfrm/xfrm_user.c:3194:\tstruct xfrm_user_offload *xuo = NULL;\nnet/xfrm/xfrm_user.c-3195-\tu32 if_id = 0;\n--\nnet/xfrm/xfrm_user.c=3309=static unsigned int xfrm_migrate_state_msgsize(const struct xfrm_migrate *m,\n--\nnet/xfrm/xfrm_user.c-3313-\t\t(m-\u003eencap ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0) +\nnet/xfrm/xfrm_user.c:3314:\t\t(m-\u003exuo ? nla_total_size(sizeof(struct xfrm_user_offload)) : 0) +\nnet/xfrm/xfrm_user.c-3315-\t\t(m-\u003enew_mark ? nla_total_size(sizeof(struct xfrm_mark)) : 0) +\n--\nnet/xfrm/xfrm_user.c=3343=static int xfrm_do_migrate_state(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-3347-\tstruct net *net = sock_net(skb-\u003esk);\nnet/xfrm/xfrm_user.c:3348:\tstruct xfrm_user_offload xuo = {};\nnet/xfrm/xfrm_user.c-3349-\tstruct xfrm_migrate m = {};\n--\nnet/xfrm/xfrm_user.c=3571=static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,\n--\nnet/xfrm/xfrm_user.c-3573-{\nnet/xfrm/xfrm_user.c:3574:\treturn NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))\nnet/xfrm/xfrm_user.c-3575-\t      + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)\n--\nnet/xfrm/xfrm_user.c=3581=static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,\n--\nnet/xfrm/xfrm_user.c-3586-\tconst struct xfrm_migrate *mp;\nnet/xfrm/xfrm_user.c:3587:\tstruct xfrm_userpolicy_id *pol_id;\nnet/xfrm/xfrm_user.c-3588-\tstruct nlmsghdr *nlh;\n--\nnet/xfrm/xfrm_user.c=3659=const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {\n--\nnet/xfrm/xfrm_user.c-3662-\t[XFRM_MSG_GETSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),\nnet/xfrm/xfrm_user.c:3663:\t[XFRM_MSG_NEWPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),\nnet/xfrm/xfrm_user.c:3664:\t[XFRM_MSG_DELPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_user.c:3665:\t[XFRM_MSG_GETPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_user.c-3666-\t[XFRM_MSG_ALLOCSPI    - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),\n--\nnet/xfrm/xfrm_user.c-3668-\t[XFRM_MSG_EXPIRE      - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),\nnet/xfrm/xfrm_user.c:3669:\t[XFRM_MSG_UPDPOLICY   - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),\nnet/xfrm/xfrm_user.c-3670-\t[XFRM_MSG_UPDSA       - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),\n--\nnet/xfrm/xfrm_user.c-3676-\t[XFRM_MSG_REPORT      - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),\nnet/xfrm/xfrm_user.c:3677:\t[XFRM_MSG_MIGRATE     - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),\nnet/xfrm/xfrm_user.c-3678-\t[XFRM_MSG_GETSADINFO  - XFRM_MSG_BASE] = sizeof(u32),\n--\nnet/xfrm/xfrm_user.c-3681-\t[XFRM_MSG_MAPPING     - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_mapping),\nnet/xfrm/xfrm_user.c:3682:\t[XFRM_MSG_SETDEFAULT  - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),\nnet/xfrm/xfrm_user.c:3683:\t[XFRM_MSG_GETDEFAULT  - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),\nnet/xfrm/xfrm_user.c-3684-\t[XFRM_MSG_MIGRATE_STATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_migrate_state),\n--\nnet/xfrm/xfrm_user.c=3690=const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {\n--\nnet/xfrm/xfrm_user.c-3692-\t[XFRMA_SA]\t\t= { .len = sizeof(struct xfrm_usersa_info)},\nnet/xfrm/xfrm_user.c:3693:\t[XFRMA_POLICY]\t\t= { .len = sizeof(struct xfrm_userpolicy_info)},\nnet/xfrm/xfrm_user.c-3694-\t[XFRMA_LASTUSED]\t= { .type = NLA_U64},\n--\nnet/xfrm/xfrm_user.c-3708-\t[XFRMA_COADDR]\t\t= { .len = sizeof(xfrm_address_t) },\nnet/xfrm/xfrm_user.c:3709:\t[XFRMA_POLICY_TYPE]\t= { .len = sizeof(struct xfrm_userpolicy_type)},\nnet/xfrm/xfrm_user.c-3710-\t[XFRMA_MIGRATE]\t\t= { .len = sizeof(struct xfrm_user_migrate) },\n--\nnet/xfrm/xfrm_user.c-3717-\t[XFRMA_ADDRESS_FILTER]\t= { .len = sizeof(struct xfrm_address_filter) },\nnet/xfrm/xfrm_user.c:3718:\t[XFRMA_OFFLOAD_DEV]\t= { .len = sizeof(struct xfrm_user_offload) },\nnet/xfrm/xfrm_user.c-3719-\t[XFRMA_SET_MARK]\t= { .type = NLA_U32 },\n--\nnet/xfrm/xfrm_user.c=4039=static inline unsigned int xfrm_sa_len(struct xfrm_state *x)\n--\nnet/xfrm/xfrm_user.c-4068-\tif (READ_ONCE(x-\u003exso.dev))\nnet/xfrm/xfrm_user.c:4069:\t\tl += nla_total_size(sizeof(struct xfrm_user_offload));\nnet/xfrm/xfrm_user.c-4070-\tif (x-\u003eprops.smark.v | x-\u003eprops.smark.m) {\n--\nnet/xfrm/xfrm_user.c=4255=static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,\n--\nnet/xfrm/xfrm_user.c-4258-\tstruct net *net = sock_net(sk);\nnet/xfrm/xfrm_user.c:4259:\tstruct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;\nnet/xfrm/xfrm_user.c-4260-\tstruct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);\n--\nnet/xfrm/xfrm_user.c=4374=static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)\n--\nnet/xfrm/xfrm_user.c-4377-\tstruct net *net = xp_net(xp);\nnet/xfrm/xfrm_user.c:4378:\tstruct xfrm_userpolicy_info *p;\nnet/xfrm/xfrm_user.c:4379:\tstruct xfrm_userpolicy_id *id;\nnet/xfrm/xfrm_user.c-4380-\tstruct nlmsghdr *nlh;\n--\ntools/testing/selftests/net/ipsec.c=1101=static int xfrm_policy_add(int xfrm_sock, uint32_t seq, uint32_t spi,\n--\ntools/testing/selftests/net/ipsec.c-1106-\t\tstruct nlmsghdr\t\t\tnh;\ntools/testing/selftests/net/ipsec.c:1107:\t\tstruct xfrm_userpolicy_info\tinfo;\ntools/testing/selftests/net/ipsec.c-1108-\t\tchar\t\t\t\tattrbuf[MAX_PAYLOAD];\n--\ntools/testing/selftests/net/ipsec.c=1176=static int xfrm_policy_del(int xfrm_sock, uint32_t seq,\n--\ntools/testing/selftests/net/ipsec.c-1181-\t\tstruct nlmsghdr\t\t\tnh;\ntools/testing/selftests/net/ipsec.c:1182:\t\tstruct xfrm_userpolicy_id\tid;\ntools/testing/selftests/net/ipsec.c-1183-\t\tchar\t\t\t\tattrbuf[MAX_PAYLOAD];\n--\ntools/testing/selftests/net/ipsec.c=2087=static int write_proto_plan(int fd, int proto)\n--\ntools/testing/selftests/net/ipsec.c-2133- *   sizeof(xfrm_usersa_info)     = 220  |  sizeof(xfrm_usersa_info)     = 224\ntools/testing/selftests/net/ipsec.c:2134: *   sizeof(xfrm_userpolicy_info) = 164  |  sizeof(xfrm_userpolicy_info) = 168\ntools/testing/selftests/net/ipsec.c-2135- *   sizeof(xfrm_userspi_info)    = 228  |  sizeof(xfrm_userspi_info)    = 232\n--\ntools/testing/selftests/net/nettest.c=1452=static int config_xfrm_policy(int sd, struct sock_args *args)\ntools/testing/selftests/net/nettest.c-1453-{\ntools/testing/selftests/net/nettest.c:1454:\tstruct xfrm_userpolicy_info policy = {};\ntools/testing/selftests/net/nettest.c-1455-\tint type = UDP_ENCAP_ESPINUDP;\n"
}

gemini-3.1-pro-preview

null

null

							input: 18922
							output: 21
							thoughts: 49
						

Okay, here's my take on those thoughts, framed as my own:

**XFRM Configuration Deep Dive**

Right, so I'm thinking about XFRM configuration. Definitely need `CONFIG_XFRM_USER` – that's a given for user-space control. Hmm, what about `CONFIG_XFRM_OFFLOAD`? It's been a while since I played around with hardware offloading support. Let's see... I'll quickly check `include/net/xfrm.h`. My immediate goal is to locate the `xfrm_dev_offload` symbol to refresh my memory on the related functionality and whether it's appropriate for this particular scenario. Gotta make sure I'm enabling everything necessary, but nothing unnecessary.

{
  "Expression": "xfrm_dev_offload"
}

{
  "Output": "include/net/xfrm.h=145=enum {\n--\ninclude/net/xfrm.h-148-\ninclude/net/xfrm.h:149:struct xfrm_dev_offload {\ninclude/net/xfrm.h-150-\t/* The device for this offload.\n--\ninclude/net/xfrm.h=190=struct xfrm_state {\n--\ninclude/net/xfrm.h-293-\ninclude/net/xfrm.h:294:\tstruct xfrm_dev_offload xso;\ninclude/net/xfrm.h-295-\n--\ninclude/net/xfrm.h=634=struct xfrm_policy {\n--\ninclude/net/xfrm.h-666-\ninclude/net/xfrm.h:667:\tstruct xfrm_dev_offload xdo;\ninclude/net/xfrm.h-668-};\n--\ninclude/net/xfrm.h=1723=static inline void xfrm_dev_state_update_stats(struct xfrm_state *x)\ninclude/net/xfrm.h-1724-{\ninclude/net/xfrm.h:1725:\tstruct xfrm_dev_offload *xdo = \u0026x-\u003exso;\ninclude/net/xfrm.h-1726-\tstruct net_device *dev = READ_ONCE(xdo-\u003edev);\n--\ninclude/net/xfrm.h=2127=int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,\n--\ninclude/net/xfrm.h-2129-\t\t\tstruct netlink_ext_ack *extack);\ninclude/net/xfrm.h:2130:bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);\ninclude/net/xfrm.h-2131-void xfrm_dev_state_delete(struct xfrm_state *x);\n--\ninclude/net/xfrm.h=2134=static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)\ninclude/net/xfrm.h-2135-{\ninclude/net/xfrm.h:2136:\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\ninclude/net/xfrm.h-2137-\tstruct net_device *dev = READ_ONCE(xso-\u003edev);\n--\ninclude/net/xfrm.h=2161=static inline void xfrm_dev_policy_delete(struct xfrm_policy *x)\ninclude/net/xfrm.h-2162-{\ninclude/net/xfrm.h:2163:\tstruct xfrm_dev_offload *xdo = \u0026x-\u003exdo;\ninclude/net/xfrm.h-2164-\tstruct net_device *dev = xdo-\u003edev;\n--\ninclude/net/xfrm.h=2170=static inline void xfrm_dev_policy_free(struct xfrm_policy *x)\ninclude/net/xfrm.h-2171-{\ninclude/net/xfrm.h:2172:\tstruct xfrm_dev_offload *xdo = \u0026x-\u003exdo;\ninclude/net/xfrm.h-2173-\tstruct net_device *dev = xdo-\u003edev;\n--\ninclude/net/xfrm.h=2222=static inline void xfrm_dev_policy_free(struct xfrm_policy *x)\n--\ninclude/net/xfrm.h-2225-\ninclude/net/xfrm.h:2226:static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)\ninclude/net/xfrm.h-2227-{\n--\nnet/xfrm/xfrm_device.c=239=int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,\n--\nnet/xfrm/xfrm_device.c-245-\tstruct net_device *dev;\nnet/xfrm/xfrm_device.c:246:\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\nnet/xfrm/xfrm_device.c-247-\txfrm_address_t *saddr;\n--\nnet/xfrm/xfrm_device.c=359=int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,\n--\nnet/xfrm/xfrm_device.c-362-{\nnet/xfrm/xfrm_device.c:363:\tstruct xfrm_dev_offload *xdo = \u0026xp-\u003exdo;\nnet/xfrm/xfrm_device.c-364-\tstruct net_device *dev;\n--\nnet/xfrm/xfrm_device.c=418=EXPORT_SYMBOL_GPL(xfrm_dev_policy_add);\nnet/xfrm/xfrm_device.c-419-\nnet/xfrm/xfrm_device.c:420:bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)\nnet/xfrm/xfrm_device.c-421-{\n--\nnet/xfrm/xfrm_device.c-473-}\nnet/xfrm/xfrm_device.c:474:EXPORT_SYMBOL_GPL(xfrm_dev_offload_ok);\nnet/xfrm/xfrm_device.c-475-\n--\nnet/xfrm/xfrm_output.c=750=int xfrm_output(struct sock *sk, struct sk_buff *skb)\n--\nnet/xfrm/xfrm_output.c-772-\tif (x-\u003exso.type == XFRM_DEV_OFFLOAD_PACKET) {\nnet/xfrm/xfrm_output.c:773:\t\tif (!xfrm_dev_offload_ok(skb, x)) {\nnet/xfrm/xfrm_output.c-774-\t\t\tXFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);\n--\nnet/xfrm/xfrm_output.c-794-\nnet/xfrm/xfrm_output.c:795:\tif (xfrm_dev_offload_ok(skb, x)) {\nnet/xfrm/xfrm_output.c-796-\t\tstruct sec_path *sp;\n--\nnet/xfrm/xfrm_state.c=766=void xfrm_dev_state_delete(struct xfrm_state *x)\nnet/xfrm/xfrm_state.c-767-{\nnet/xfrm/xfrm_state.c:768:\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\nnet/xfrm/xfrm_state.c-769-\tstruct net_device *dev = READ_ONCE(xso-\u003edev);\n--\nnet/xfrm/xfrm_state.c=780=void xfrm_dev_state_free(struct xfrm_state *x)\nnet/xfrm/xfrm_state.c-781-{\nnet/xfrm/xfrm_state.c:782:\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\nnet/xfrm/xfrm_state.c-783-\tstruct net_device *dev = READ_ONCE(xso-\u003edev);\n--\nnet/xfrm/xfrm_state.c=886=xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)\n--\nnet/xfrm/xfrm_state.c-891-\t\tstruct xfrm_state *x;\nnet/xfrm/xfrm_state.c:892:\t\tstruct xfrm_dev_offload *xso;\nnet/xfrm/xfrm_state.c-893-\n--\nnet/xfrm/xfrm_state.c=961=int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)\n--\nnet/xfrm/xfrm_state.c-964-\tstruct hlist_node *tmp;\nnet/xfrm/xfrm_state.c:965:\tstruct xfrm_dev_offload *xso;\nnet/xfrm/xfrm_state.c-966-\tint i, err = 0, cnt = 0;\n--\nnet/xfrm/xfrm_state.c=1131=static struct xfrm_state *__xfrm_state_lookup_all(const struct xfrm_hash_state_ptrs *state_ptrs,\n--\nnet/xfrm/xfrm_state.c-1135-\t\t\t\t\t\t  unsigned short family,\nnet/xfrm/xfrm_state.c:1136:\t\t\t\t\t\t  struct xfrm_dev_offload *xdo)\nnet/xfrm/xfrm_state.c-1137-{\n--\nnet/xfrm/xfrm_state.c=1356=xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,\n--\nnet/xfrm/xfrm_state.c-1542-\t\tif (pol-\u003exdo.type == XFRM_DEV_OFFLOAD_PACKET) {\nnet/xfrm/xfrm_state.c:1543:\t\t\tstruct xfrm_dev_offload *xdo = \u0026pol-\u003exdo;\nnet/xfrm/xfrm_state.c:1544:\t\t\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\nnet/xfrm/xfrm_state.c-1545-\t\t\tstruct net_device *dev = xdo-\u003edev;\n--\nnet/xfrm/xfrm_state.c-1601-#ifdef CONFIG_XFRM_OFFLOAD\nnet/xfrm/xfrm_state.c:1602:\t\t\tstruct xfrm_dev_offload *xso = \u0026x-\u003exso;\nnet/xfrm/xfrm_state.c-1603-\n--\nnet/xfrm/xfrm_user.c=1183=static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)\n--\nnet/xfrm/xfrm_user.c-1203-\nnet/xfrm/xfrm_user.c:1204:static void xso_to_xuo_ifindex(const struct xfrm_dev_offload *xso, int ifindex,\nnet/xfrm/xfrm_user.c-1205-\t\t\t       struct xfrm_user_offload *xuo)\n--\nnet/xfrm/xfrm_user.c-1214-#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_user.c:1215:static void xso_to_xuo(const struct xfrm_dev_offload *xso,\nnet/xfrm/xfrm_user.c-1216-\t\t       struct xfrm_user_offload *xuo)\n--\nnet/xfrm/xfrm_user.c-1221-\nnet/xfrm/xfrm_user.c:1222:static int copy_user_offload_ifindex(const struct xfrm_dev_offload *xso,\nnet/xfrm/xfrm_user.c-1223-\t\t\t\t     int ifindex, struct sk_buff *skb)\n--\nnet/xfrm/xfrm_user.c-1238-\nnet/xfrm/xfrm_user.c:1239:static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)\nnet/xfrm/xfrm_user.c-1240-{\n--\nnet/xfrm/xfrm_user.c-1243-\nnet/xfrm/xfrm_user.c:1244:static int copy_user_state_offload(const struct xfrm_dev_offload *xso,\nnet/xfrm/xfrm_user.c-1245-\t\t\t\t   struct sk_buff *skb)\n"
}

gemini-3.1-pro-preview

null

null

							input: 22244
							output: 21
							thoughts: 158
						

**My Configuration Investigation**

Okay, so I'm digging into the dependencies here. I need to make sure `CONFIG_XFRM_OFFLOAD` is enabled because it's crucial for the `xfrm_dev_offload` logic. That's the core of the issue.

Now, let's just run through the relevant configurations to be sure I haven't missed anything. I need to ensure these are enabled: `XFRM`, `XFRM_USER`, `XFRM_IPTFS`, and, of course, the one I mentioned already: `XFRM_OFFLOAD`.

I'm pausing briefly on `XFRM_NAT`, though. It's a bit of a gray area in my memory. Is it actually `CONFIG_XFRM_NAT` as a separate option, or is the NAT functionality just implicitly tied to `CONFIG_XFRM`? To be sure, I should really double-check the `net/xfrm/Makefile` to confirm the dependencies for building something like `xfrm_nat_keepalive.o`. I'm pretty sure that file is built only if `CONFIG_XFRM` is enabled, but I don't recall seeing a specific `CONFIG_XFRM_NAT`. I need to verify that's a configuration option that even exists and that it's separate, or if the functionality is just part of the core XFRM configuration.

no matches

{
  "Expression": "CONFIG_XFRM_NAT"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 22744
							output: 23
							thoughts: 32
						

Okay, here's my take on those initial thoughts:

**Navigating the XFRM Configuration Space**

Alright, so the first thing I've got to do is figure out where these options fit into the bigger picture. I was looking for `CONFIG_XFRM_NAT`, and, well, it appears that particular flag isn't defined. That's a classic case of either a typo, an outdated reference, or perhaps the functionality it represents is folded into something else.

Since `CONFIG_XFRM_NAT` isn't there, it's time to shift gears. The next logical step is to check for `CONFIG_XFRM_MIGRATE`. Hopefully, this exists, and even if not, it provides some useful context, or will point me in the direction of where the right configuration option may reside. Maybe it relates to the same core functionality, or at least a related area of network stack configuration that I should consider. Knowing the relationships between these configurations is key to understanding the system.

{
  "Expression": "CONFIG_XFRM_MIGRATE"
}

{
  "Output": "Documentation/networking/xfrm/xfrm_migrate_state.rst=191=Userspace can probe for kernel support by sending a minimal\n--\nDocumentation/networking/xfrm/xfrm_migrate_state.rst-195-  is out of range\nDocumentation/networking/xfrm/xfrm_migrate_state.rst:196:- ``-ENOPROTOOPT``: message type is known but ``CONFIG_XFRM_MIGRATE``\nDocumentation/networking/xfrm/xfrm_migrate_state.rst-197-  is not enabled\n--\narch/arm/configs/axm55xx_defconfig=59=CONFIG_XFRM_SUB_POLICY=y\narch/arm/configs/axm55xx_defconfig:60:CONFIG_XFRM_MIGRATE=y\narch/arm/configs/axm55xx_defconfig-61-CONFIG_XFRM_STATISTICS=y\n--\narch/m68k/configs/amiga_defconfig=53=CONFIG_TLS=m\narch/m68k/configs/amiga_defconfig:54:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/amiga_defconfig-55-CONFIG_NET_KEY=y\n--\narch/m68k/configs/apollo_defconfig=49=CONFIG_TLS=m\narch/m68k/configs/apollo_defconfig:50:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/apollo_defconfig-51-CONFIG_NET_KEY=y\n--\narch/m68k/configs/atari_defconfig=56=CONFIG_TLS=m\narch/m68k/configs/atari_defconfig:57:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/atari_defconfig-58-CONFIG_NET_KEY=y\n--\narch/m68k/configs/bvme6000_defconfig=46=CONFIG_TLS=m\narch/m68k/configs/bvme6000_defconfig:47:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/bvme6000_defconfig-48-CONFIG_NET_KEY=y\n--\narch/m68k/configs/hp300_defconfig=48=CONFIG_TLS=m\narch/m68k/configs/hp300_defconfig:49:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/hp300_defconfig-50-CONFIG_NET_KEY=y\n--\narch/m68k/configs/mac_defconfig=47=CONFIG_TLS=m\narch/m68k/configs/mac_defconfig:48:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/mac_defconfig-49-CONFIG_NET_KEY=y\n--\narch/m68k/configs/multi_defconfig=67=CONFIG_TLS=m\narch/m68k/configs/multi_defconfig:68:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/multi_defconfig-69-CONFIG_NET_KEY=y\n--\narch/m68k/configs/mvme147_defconfig=45=CONFIG_TLS=m\narch/m68k/configs/mvme147_defconfig:46:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/mvme147_defconfig-47-CONFIG_NET_KEY=y\n--\narch/m68k/configs/mvme16x_defconfig=46=CONFIG_TLS=m\narch/m68k/configs/mvme16x_defconfig:47:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/mvme16x_defconfig-48-CONFIG_NET_KEY=y\n--\narch/m68k/configs/q40_defconfig=47=CONFIG_TLS=m\narch/m68k/configs/q40_defconfig:48:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/q40_defconfig-49-CONFIG_NET_KEY=y\n--\narch/m68k/configs/sun3_defconfig=42=CONFIG_TLS=m\narch/m68k/configs/sun3_defconfig:43:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/sun3_defconfig-44-CONFIG_NET_KEY=y\n--\narch/m68k/configs/sun3x_defconfig=43=CONFIG_TLS=m\narch/m68k/configs/sun3x_defconfig:44:CONFIG_XFRM_MIGRATE=y\narch/m68k/configs/sun3x_defconfig-45-CONFIG_NET_KEY=y\n--\narch/mips/configs/db1xxx_defconfig=36=CONFIG_XFRM_SUB_POLICY=y\narch/mips/configs/db1xxx_defconfig:37:CONFIG_XFRM_MIGRATE=y\narch/mips/configs/db1xxx_defconfig-38-CONFIG_INET=y\n--\narch/parisc/configs/generic-64bit_defconfig=44=CONFIG_XFRM_SUB_POLICY=y\narch/parisc/configs/generic-64bit_defconfig:45:CONFIG_XFRM_MIGRATE=y\narch/parisc/configs/generic-64bit_defconfig-46-CONFIG_INET=y\n--\ninclude/net/xfrm.h=1909=int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);\ninclude/net/xfrm.h-1910-\ninclude/net/xfrm.h:1911:#ifdef CONFIG_XFRM_MIGRATE\ninclude/net/xfrm.h-1912-int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,\n--\ninclude/net/xfrm.h=2035=static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)\n--\ninclude/net/xfrm.h-2039-\ninclude/net/xfrm.h:2040:#ifdef CONFIG_XFRM_MIGRATE\ninclude/net/xfrm.h-2041-static inline int xfrm_replay_clone(struct xfrm_state *x,\n--\nnet/xfrm/xfrm_policy.c=4484=EXPORT_SYMBOL_GPL(xfrm_audit_policy_delete);\n--\nnet/xfrm/xfrm_policy.c-4486-\nnet/xfrm/xfrm_policy.c:4487:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_policy.c-4488-static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *sel,\n--\nnet/xfrm/xfrm_state.c=1949=EXPORT_SYMBOL(xfrm_state_add);\nnet/xfrm/xfrm_state.c-1950-\nnet/xfrm/xfrm_state.c:1951:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_state.c-1952-static inline int clone_security(struct xfrm_state *x, struct xfrm_sec_ctx *security)\n--\nnet/xfrm/xfrm_state.c=2884=EXPORT_SYMBOL(km_policy_expired);\nnet/xfrm/xfrm_state.c-2885-\nnet/xfrm/xfrm_state.c:2886:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_state.c-2887-int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,\n--\nnet/xfrm/xfrm_user.c=1204=static void xso_to_xuo_ifindex(const struct xfrm_dev_offload *xso, int ifindex,\n--\nnet/xfrm/xfrm_user.c-1213-\nnet/xfrm/xfrm_user.c:1214:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_user.c-1215-static void xso_to_xuo(const struct xfrm_dev_offload *xso,\n--\nnet/xfrm/xfrm_user.c=3042=static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-3116-\nnet/xfrm/xfrm_user.c:3117:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_user.c-3118-static void copy_from_user_migrate_state(struct xfrm_migrate *ma,\n--\nnet/xfrm/xfrm_user.c=3532=static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,\n--\nnet/xfrm/xfrm_user.c-3538-\nnet/xfrm/xfrm_user.c:3539:#ifdef CONFIG_XFRM_MIGRATE\nnet/xfrm/xfrm_user.c-3540-static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)\n"
}

gemini-3.1-pro-preview

null

null

							input: 25451
							output: 21
							thoughts: 889
						

**Analyzing the Configuration Dependency**

Okay, so I'm looking at this patch and it seems pretty straightforward. The core of it boils down to the `xso_to_xuo` function, which is used to convert data from an `xfrm_dev_offload` structure (`xso`) to an `xfrm_user_offload` structure (`xuo`). And now I can see, `CONFIG_XFRM_MIGRATE` is guarding that function.

Specifically, I can see that this `#ifdef CONFIG_XFRM_MIGRATE` block means that we need to have that configuration option enabled to get this particular function.

It's clear that the purpose of this is to support migration. This probably means that with this functionality enabled, a different interface index needs to be passed to the function in some circumstances, and this is why a new function, `xso_to_xuo_ifindex`, has been created. I see that the original `xso_to_xuo` now calls `xso_to_xuo_ifindex` passing in the ifindex. Also, I see that the new function `copy_user_state_offload` is now calling `copy_user_offload_ifindex` and passes in the ifindex from the `xso`.

To be absolutely sure about the context of this, I should probably enumerate the relevant config options that are at play here. Let's see... I'm thinking: `XFRM_USER`, `XFRM_IPTFS`, and `XFRM_OFFLOAD` (that one's important, I think it's the basis for the offload functionality) and, of course, the key one, `XFRM_MIGRATE`. I can just add `XFRM` for completeness, that seems like a base config.

{
  "Expression": "config XFRM_OFFLOAD"
}

{
  "Output": "net/xfrm/Kconfig=5=config XFRM\n--\nnet/xfrm/Kconfig-10-\nnet/xfrm/Kconfig:11:config XFRM_OFFLOAD\nnet/xfrm/Kconfig-12-\tbool\n"
}

gemini-3.1-pro-preview

null

null

							input: 26832
							output: 21
							thoughts: 32
						

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

**Checking XFRM Offload and IPTFS Configuration**

Right, `XFRM_OFFLOAD` is definitely a boolean config option. No surprises there. Now, just to confirm my understanding of the broader picture, let's quickly cross-reference that with the Kconfig documentation for `XFRM_IPTFS`. I need to ensure I'm not missing any subtle interactions or dependencies between these features. It's easy to get lost in the forest when dealing with network configurations of this complexity, and a quick double-check can prevent a lot of headaches down the line. It's just good practice to review the related options together.

{
  "Expression": "config XFRM_IPTFS"
}

{
  "Output": "net/xfrm/Kconfig=125=config NET_KEY_MIGRATE\n--\nnet/xfrm/Kconfig-140-\nnet/xfrm/Kconfig:141:config XFRM_IPTFS\nnet/xfrm/Kconfig-142-\ttristate \"IPsec IP-TFS/AGGFRAG (RFC 9347) encapsulation support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 27148
							output: 22
							thoughts: 28
						

Here's my thought process, summarized as you requested:

**Assessing Configuration Options**

Okay, so I'm looking at this configuration. Right off the bat, I recognize that `XFRM_IPTFS` is a legitimate and acceptable setting. That's good to know, confirming it's a known configuration option. Now, let's see what's related to it. My next check is going to be on `XFRM_MIGRATE`. I need to assess how that plays into the overall setup.

{
  "Expression": "config XFRM_MIGRATE"
}

{
  "Output": "net/xfrm/Kconfig=51=config XFRM_SUB_POLICY\n--\nnet/xfrm/Kconfig-60-\nnet/xfrm/Kconfig:61:config XFRM_MIGRATE\nnet/xfrm/Kconfig-62-\tbool \"Transformation migrate database\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 27396
							output: 21
							thoughts: 1493
						

**Analyzing XFRM Subsystem Fixes for Fuzzing**

Okay, so we have a patch addressing several issues within the XFRM subsystem. My initial thought is, yes, `XFRM_MIGRATE` is a valid config.  And since we're dealing with IPv6-related code in `net/ipv6/xfrm6_policy.c` and `nat_keepalive_send_ipv6`, `CONFIG_IPV6` is definitely a requirement, though it's usually enabled, so let's keep that in mind.

Now, let's nail down the critical symbols to focus on during fuzzing. I initially identified a long list, but we need to narrow it down to the most relevant:

*   `validate_xmit_xfrm`
*   `xfrm6_fill_dst`
*   `xfrm_dev_state_add`
*   `iptfs_skb_add_frags`
*   `nat_keepalive_send`
*   `xfrm_hash_rebuild`
*   `xfrm_state_find`
*   `xfrm_state_clone_and_setup`
*   `xfrm_user_policy`
*   `__xfrm_init_state`
*   `copy_to_user_state_extra`
*   `validate_tmpl`

I'm filtering out the hot-path functions like `__dev_queue_xmit` and `validate_xmit_skb_list`, focusing on the more specialized functions. Then I refined this list based on what the patch is changing.

Taking a closer look, `validate_xmit_xfrm` is in `net/xfrm/xfrm_device.c` and it's called from `validate_xmit_skb`, so it's somewhat hot-path, but definitely specific to XFRM offload. `iptfs_skb_add_frags` is IPTFS specific, `nat_keepalive_send` is NAT keepalive, and so on.

Now the next step is to check symbol visibility. I checked if the functions are static or exported. Here are the important ones:
* `validate_xmit_xfrm` - exported.
* `xfrm6_fill_dst` - Relevant.
* `xfrm_dev_state_add` - Relevant.
* `iptfs_skb_add_frags` - static.
* `nat_keepalive_send` - static.
* `xfrm_hash_rebuild` - static.
* `xfrm_state_find` - exported.
* `xfrm_state_clone_and_setup` - static.
* `xfrm_user_policy` - exported.
* `__xfrm_init_state` - exported.
* `validate_tmpl` - static.

Based on that, I want to include exported functions but also some important static ones, and then let's see why this list is needed.

The core of the patch addresses multiple problems: handling `ERR_PTR(-EINPROGRESS)` from async crypto, fixing memory leaks in `xfrm6_fill_dst` and `nat_keepalive_send`, addressing an incorrect prefix length check in `xfrm_hash_rebuild`, fixing use-after-free issues in `xfrm_state_clone_and_setup` and `__xfrm_init_state`, mitigating a data race in `xfrm_user.c`, correcting `XFRM_MODE_IPTFS` validation in `validate_tmpl`, and setting `SKBFL_SHARED_FRAG` in `iptfs_skb_add_frags`.

These are significant functional changes covering core XFRM logic, IPsec offload, IPTFS, and NAT keepalive. Therefore, they all warrant fuzzing to ensure the fixes are correct and don't introduce regressions.

So, the configurations we need to ensure are enabled are:

*   `XFRM_USER`
*   `XFRM_IPTFS`
*   `XFRM_OFFLOAD`
*   `XFRM_MIGRATE`
*   `IPV6`

I'll quickly double-check `XFRM_OFFLOAD` to make sure it's a bool and how it is enabled. After that, we are good to start fuzzing.

{
  "Expression": "config XFRM_OFFLOAD"
}

{
  "Output": "net/xfrm/Kconfig=5=config XFRM\n--\nnet/xfrm/Kconfig-10-\nnet/xfrm/Kconfig:11:config XFRM_OFFLOAD\nnet/xfrm/Kconfig-12-\tbool\n"
}

gemini-3.1-pro-preview

null

null

							input: 29948
							output: 21
							thoughts: 22
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and presented as if it were my own internal monologue:

**Navigating the Unprompted Path**

Alright, I'm encountering a model with no explicit prompt. Intriguing. That immediately signals a different selection mechanism at play. My immediate thought is, "Okay, so it wasn't called directly. What triggered *this* particular configuration?" This implies a deeper layer of orchestration, likely driven by some external system, perhaps a meta-prompt, a rule-based engine, or a cascading set of dependencies. I need to understand the selector, the criteria that led to this model being chosen. Is it based on input context, performance benchmarks, resource availability, or something more esoteric? This absence of a direct prompt forces me to reverse-engineer the decision-making process. The selection itself *is* the prompt, in a sense – just a hidden one. I have to figure out the implicit query. I'll need to look at the surrounding environment, the active configurations, and any logs to trace the path to this specific instantiation.

{
  "Expression": "select XFRM_OFFLOAD"
}

{
  "Output": "net/ipv4/Kconfig=369=config INET_ESP_OFFLOAD\n--\nnet/ipv4/Kconfig-371-\tdepends on INET_ESP\nnet/ipv4/Kconfig:372:\tselect XFRM_OFFLOAD\nnet/ipv4/Kconfig-373-\tdefault n\n--\nnet/ipv6/Kconfig=77=config INET6_ESP_OFFLOAD\n--\nnet/ipv6/Kconfig-79-\tdepends on INET6_ESP\nnet/ipv6/Kconfig:80:\tselect XFRM_OFFLOAD\nnet/ipv6/Kconfig-81-\tdefault n\n"
}

gemini-3.1-pro-preview

null

null

							input: 30395
							output: 22
							thoughts: 72
						

Okay, here's my take on those thoughts, framed as my own mental processing:

**ESP Offload Configuration for Testing**

Right, so `INET_ESP_OFFLOAD` and `INET6_ESP_OFFLOAD` both, in effect, choose `XFRM_OFFLOAD`. That's the key. That means if I want to thoroughly examine and test the ESP offload paths, I need to make sure I enable *both* `INET_ESP_OFFLOAD` and `INET6_ESP_OFFLOAD`. Seems straightforward enough. The point is to cover both IPv4 and IPv6 implementations. Let me start by focusing my attention on `INET_ESP_OFFLOAD`, making sure I understand the precise implications of its configuration.

{
  "Expression": "config INET_ESP_OFFLOAD"
}

{
  "Output": "net/ipv4/Kconfig=354=config INET_ESP\n--\nnet/ipv4/Kconfig-368-\nnet/ipv4/Kconfig:369:config INET_ESP_OFFLOAD\nnet/ipv4/Kconfig-370-\ttristate \"IP: ESP transformation offload\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 30738
							output: 20
							thoughts: 289
						

**Refining the Configuration for IPsec Offload**

Okay, so we're working with tristate options here, particularly when dealing with the prompts. My initial thought is to make sure we include `INET_ESP_OFFLOAD` and `INET6_ESP_OFFLOAD` in the configuration. They're critical for the offload functionality.

Now, let's refine the configuration list itself. I'm thinking we need:
*   `XFRM_USER`
*   `XFRM_IPTFS`
*   `XFRM_MIGRATE`
*   `INET_ESP_OFFLOAD`
*   `INET6_ESP_OFFLOAD`
*   `IPV6`

Wait a moment, I just realized that `XFRM_OFFLOAD` is implicitly selected by those others, so we don't need to list it explicitly. Though, adding it won't hurt either. However, because it lacks a direct prompt, simply setting `CONFIG_XFRM_OFFLOAD=y` might not be enough in a `make defconfig` or `make oldconfig` scenario. It's cleaner and more robust to just specify the direct enables, and that makes me lean back to explicitly mentioning `INET_ESP_OFFLOAD` and `INET6_ESP_OFFLOAD` instead.

I should double-check the prompting on the other ones. Let's look at `XFRM_MIGRATE` again... Yep, it has that prompt "Transformation migrate database". So, that one *can* be directly enabled. Good.

Next, I'll confirm `XFRM_IPTFS`. It has "IPsec IP-TFS/AGGFRAG (RFC 9347) encapsulation support". That's a good prompt; we can directly enable that.

Finally, I'll go back to check on `XFRM_USER`.

{
  "Expression": "config XFRM_USER"
}

{
  "Output": "net/xfrm/Kconfig=22=if INET\nnet/xfrm/Kconfig:23:config XFRM_USER\nnet/xfrm/Kconfig-24-\ttristate \"Transformation user configuration interface\"\n--\nnet/xfrm/Kconfig-31-\nnet/xfrm/Kconfig:32:config XFRM_USER_COMPAT\nnet/xfrm/Kconfig-33-\ttristate \"Compatible ABI support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 31579
							output: 293
							thoughts: 358
						

**My Assessment of the XFRM Patch and Fuzzing Strategy**

Okay, so we're looking at a patch with a clear starting point – we have a prompt to work from. Let's see, the configs that are relevant are `XFRM_USER`, `XFRM_IPTFS`, `XFRM_MIGRATE`, `INET_ESP_OFFLOAD`, and `INET6_ESP_OFFLOAD`. It would be wise to add `IPV6` to that list, even though it's typically enabled. Just to be sure we cover all bases.

Now, let's dive into the core components. I've reviewed the `FocusSymbols`, which gives me a good overview. We've got `validate_xmit_xfrm`, `xfrm6_fill_dst`, `xfrm_dev_state_add`, `iptfs_skb_add_frags`, `nat_keepalive_send`, `xfrm_hash_rebuild`, `xfrm_state_find`, `xfrm_state_clone_and_setup`, `xfrm_user_policy`, `__xfrm_init_state`, and `validate_tmpl`. Yep, that's a comprehensive set of functions.

Based on the reasoning provided, this patch tackles some critical issues within the XFRM (IPsec) subsystem. Memory leaks in NAT keepalive, errors in IPv6 policy routing, and handling `-EINPROGRESS` async crypto are all serious. Plus, the prefix length bug, use-after-free, and data races are the kind of vulnerabilities we need to be very concerned about. Specifically, it's about core kernel logic, which means these changes *must* be rigorously fuzzed to verify the fixes and prevent new regressions.

So, this looks like a solid plan. I'm satisfied. Let's `set-results`.

{
  "EnableConfigs": [
    "XFRM_USER",
    "XFRM_IPTFS",
    "XFRM_MIGRATE",
    "INET_ESP_OFFLOAD",
    "INET6_ESP_OFFLOAD"
  ],
  "FocusSymbols": [
    "validate_xmit_xfrm",
    "xfrm6_fill_dst",
    "xfrm_dev_state_add",
    "iptfs_skb_add_frags",
    "nat_keepalive_send",
    "xfrm_hash_rebuild",
    "xfrm_state_find",
    "xfrm_state_clone_and_setup",
    "xfrm_user_policy",
    "__xfrm_init_state",
    "validate_tmpl"
  ],
  "Reasoning": "The patch fixes multiple functional bugs in the XFRM (IPsec) subsystem, including memory leaks in NAT keepalive and IPv6 policy routing, incorrect handling of async crypto returns (-EINPROGRESS) during packet transmission, a prefix length check bug in hash rebuilding, use-after-free vulnerabilities during state initialization/cloning, and data races in user offload state copying. It also adds proper validation for IPTFS mode and fixes shared fragment handling in IPTFS. These are reachable core kernel logic changes that should be fuzzed.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "XFRM_USER",
    "XFRM_IPTFS",
    "XFRM_MIGRATE",
    "INET_ESP_OFFLOAD",
    "INET6_ESP_OFFLOAD"
  ],
  "FocusSymbols": [
    "validate_xmit_xfrm",
    "xfrm6_fill_dst",
    "xfrm_dev_state_add",
    "iptfs_skb_add_frags",
    "nat_keepalive_send",
    "xfrm_hash_rebuild",
    "xfrm_state_find",
    "xfrm_state_clone_and_setup",
    "xfrm_user_policy",
    "__xfrm_init_state",
    "validate_tmpl"
  ],
  "Reasoning": "The patch fixes multiple functional bugs in the XFRM (IPsec) subsystem, including memory leaks in NAT keepalive and IPv6 policy routing, incorrect handling of async crypto returns (-EINPROGRESS) during packet transmission, a prefix length check bug in hash rebuilding, use-after-free vulnerabilities during state initialization/cloning, and data races in user offload state copying. It also adds proper validation for IPTFS mode and fixes shared fragment handling in IPTFS. These are reachable core kernel logic changes that should be fuzzed.",
  "WorthFuzzing": true
}