AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/08 07:17	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.", "WorthFuzzing": false }
1/1	2026/07/08 07:17	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 6791894aed4fb3e8436591e6b983c23720849b03\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Wed Jul 8 07:17:18 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/include/linux/netfilter/nfnetlink_osf.h b/include/linux/netfilter/nfnetlink_osf.h\nindex 788613f3693590..d720abf59ca8f8 100644\n--- a/include/linux/netfilter/nfnetlink_osf.h\n+++ b/include/linux/netfilter/nfnetlink_osf.h\n@@ -26,7 +26,7 @@ struct nf_osf_data {\n \tconst char version;\n };\n \n-bool nf_osf_match(const struct sk_buff skb, u_int8_t family,\n+bool nf_osf_match(const struct sk_buff skb, u8 family,\n \t\t int hooknum, struct net_device in, struct net_device out,\n \t\t const struct nf_osf_info info, struct net net,\n \t\t const struct list_head nf_osf_fingers);\ndiff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c\nindex d40b404c1bf646..1ae99766014825 100644\n--- a/net/netfilter/ipvs/ip_vs_core.c\n+++ b/net/netfilter/ipvs/ip_vs_core.c\n@@ -882,7 +882,7 @@ static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum)\n }\n \n static inline int ip_vs_gather_frags(struct netns_ipvs ipvs,\n-\t\t\t\t struct sk_buff skb, u_int32_t user)\n+\t\t\t\t struct sk_buff skb, u32 user)\n {\n \tint err;\n \ndiff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c\nindex 0ff089e03891e6..87c9c6b92a6d40 100644\n--- a/net/netfilter/nf_conntrack_sip.c\n+++ b/net/netfilter/nf_conntrack_sip.c\n@@ -935,7 +935,7 @@ static int set_expected_rtp_rtcp(struct sk_buff skb, unsigned int protoff,\n \tunion nf_inet_addr saddr;\n \tstruct nf_conntrack_tuple tuple;\n \tint direct_rtp = 0, skip_expect = 0, ret = NF_DROP;\n-\tu_int16_t base_port;\n+\tu16 base_port;\n \t__be16 rtp_port, rtcp_port;\n \tconst struct nf_nat_sip_hooks hooks;\n \tstruct nf_conn_help help;\ndiff --git a/net/netfilter/nf_nat_amanda.c b/net/netfilter/nf_nat_amanda.c\nindex 8f1054920a8571..fe054cb4fc0bc3 100644\n--- a/net/netfilter/nf_nat_amanda.c\n+++ b/net/netfilter/nf_nat_amanda.c\n@@ -33,7 +33,7 @@ static unsigned int help(struct sk_buff skb,\n \t\t\t struct nf_conntrack_expect exp)\n {\n \tchar buffer[sizeof(\"65535\")];\n-\tu_int16_t port;\n+\tu16 port;\n \n \t/ Connection comes from client. /\n \texp-\u003esaved_proto.tcp.port = exp-\u003etuple.dst.u.tcp.port;\ndiff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c\nindex 92002079f8eab6..88382e2108eb4b 100644\n--- a/net/netfilter/nfnetlink_osf.c\n+++ b/net/netfilter/nfnetlink_osf.c\n@@ -179,7 +179,7 @@ static const struct tcphdr nf_osf_hdr_ctx_init(struct nf_osf_hdr_ctx ctx,\n }\n \n bool\n-nf_osf_match(const struct sk_buff skb, u_int8_t family,\n+nf_osf_match(const struct sk_buff skb, u8 family,\n \t int hooknum, struct net_device in, struct net_device out,\n \t const struct nf_osf_info info, struct net net,\n \t const struct list_head nf_osf_fingers)\n" }
2/1	2026/07/08 07:17	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.", "WorthFuzzing": false } 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 6791894aed4fb3e8436591e6b983c23720849b03 Author: syz-cluster <triage@syzkaller.com> Date: Wed Jul 8 07:17:18 2026 +0000 syz-cluster: applied patch under review diff --git a/include/linux/netfilter/nfnetlink_osf.h b/include/linux/netfilter/nfnetlink_osf.h index 788613f3693590..d720abf59ca8f8 100644 --- a/include/linux/netfilter/nfnetlink_osf.h +++ b/include/linux/netfilter/nfnetlink_osf.h @@ -26,7 +26,7 @@ struct nf_osf_data { const char version; }; -bool nf_osf_match(const struct sk_buff skb, u_int8_t family, +bool nf_osf_match(const struct sk_buff skb, u8 family, int hooknum, struct net_device in, struct net_device out, const struct nf_osf_info info, struct net net, const struct list_head nf_osf_fingers); diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index d40b404c1bf646..1ae99766014825 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -882,7 +882,7 @@ static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum) } static inline int ip_vs_gather_frags(struct netns_ipvs ipvs, - struct sk_buff skb, u_int32_t user) + struct sk_buff skb, u32 user) { int err; diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index 0ff089e03891e6..87c9c6b92a6d40 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -935,7 +935,7 @@ static int set_expected_rtp_rtcp(struct sk_buff skb, unsigned int protoff, union nf_inet_addr saddr; struct nf_conntrack_tuple tuple; int direct_rtp = 0, skip_expect = 0, ret = NF_DROP; - u_int16_t base_port; + u16 base_port; __be16 rtp_port, rtcp_port; const struct nf_nat_sip_hooks hooks; struct nf_conn_help help; diff --git a/net/netfilter/nf_nat_amanda.c b/net/netfilter/nf_nat_amanda.c index 8f1054920a8571..fe054cb4fc0bc3 100644 --- a/net/netfilter/nf_nat_amanda.c +++ b/net/netfilter/nf_nat_amanda.c @@ -33,7 +33,7 @@ static unsigned int help(struct sk_buff skb, struct nf_conntrack_expect exp) { char buffer[sizeof("65535")]; - u_int16_t port; + u16 port; / Connection comes from client. / exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port; diff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c index 92002079f8eab6..88382e2108eb4b 100644 --- a/net/netfilter/nfnetlink_osf.c +++ b/net/netfilter/nfnetlink_osf.c @@ -179,7 +179,7 @@ static const struct tcphdr nf_osf_hdr_ctx_init(struct nf_osf_hdr_ctx ctx, } bool -nf_osf_match(const struct sk_buff skb, u_int8_t family, +nf_osf_match(const struct sk_buff skb, u8 family, int hooknum, struct net_device in, struct net_device out, const struct nf_osf_info info, struct net net, const struct list_head nf_osf_fingers)
3/2	2026/07/08 07:17	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2855 output: 84 thoughts: 205 Thoughts: Analyzing a Netfilter Patch Okay, so I'm looking at this patch and immediately see a pattern. It's changing those `u_int8_t`, `u_int32_t`, and `u_int16_t` types to their more modern `u8`, `u32`, and `u16` equivalents, respectively, across a bunch of netfilter files. Nothing too surprising – I've seen this kind of cleanup before. The files affected are `nfnetlink_osf.h`, `ip_vs_core.c`, `nf_conntrack_sip.c`, `nf_nat_amanda.c`, and `nfnetlink_osf.c`. It's clear that this is a purely cosmetic change; no actual execution logic is being altered here, just the type names. Given that, I don't see anything that would warrant a deeper dive. This is definitely not the kind of change that would introduce a functional bug or vulnerability. This is definitely something that I'm not going to spend time fuzzing over.
4/2	2026/07/08 07:17	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/08 07:17

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.",
  "WorthFuzzing": false
}

1/1

2026/07/08 07:17

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 6791894aed4fb3e8436591e6b983c23720849b03\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 8 07:17:18 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/linux/netfilter/nfnetlink_osf.h b/include/linux/netfilter/nfnetlink_osf.h\nindex 788613f3693590..d720abf59ca8f8 100644\n--- a/include/linux/netfilter/nfnetlink_osf.h\n+++ b/include/linux/netfilter/nfnetlink_osf.h\n@@ -26,7 +26,7 @@ struct nf_osf_data {\n \tconst char *version;\n };\n \n-bool nf_osf_match(const struct sk_buff *skb, u_int8_t family,\n+bool nf_osf_match(const struct sk_buff *skb, u8 family,\n \t\t  int hooknum, struct net_device *in, struct net_device *out,\n \t\t  const struct nf_osf_info *info, struct net *net,\n \t\t  const struct list_head *nf_osf_fingers);\ndiff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c\nindex d40b404c1bf646..1ae99766014825 100644\n--- a/net/netfilter/ipvs/ip_vs_core.c\n+++ b/net/netfilter/ipvs/ip_vs_core.c\n@@ -882,7 +882,7 @@ static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum)\n }\n \n static inline int ip_vs_gather_frags(struct netns_ipvs *ipvs,\n-\t\t\t\t     struct sk_buff *skb, u_int32_t user)\n+\t\t\t\t     struct sk_buff *skb, u32 user)\n {\n \tint err;\n \ndiff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c\nindex 0ff089e03891e6..87c9c6b92a6d40 100644\n--- a/net/netfilter/nf_conntrack_sip.c\n+++ b/net/netfilter/nf_conntrack_sip.c\n@@ -935,7 +935,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff,\n \tunion nf_inet_addr *saddr;\n \tstruct nf_conntrack_tuple tuple;\n \tint direct_rtp = 0, skip_expect = 0, ret = NF_DROP;\n-\tu_int16_t base_port;\n+\tu16 base_port;\n \t__be16 rtp_port, rtcp_port;\n \tconst struct nf_nat_sip_hooks *hooks;\n \tstruct nf_conn_help *help;\ndiff --git a/net/netfilter/nf_nat_amanda.c b/net/netfilter/nf_nat_amanda.c\nindex 8f1054920a8571..fe054cb4fc0bc3 100644\n--- a/net/netfilter/nf_nat_amanda.c\n+++ b/net/netfilter/nf_nat_amanda.c\n@@ -33,7 +33,7 @@ static unsigned int help(struct sk_buff *skb,\n \t\t\t struct nf_conntrack_expect *exp)\n {\n \tchar buffer[sizeof(\"65535\")];\n-\tu_int16_t port;\n+\tu16 port;\n \n \t/* Connection comes from client. */\n \texp-\u003esaved_proto.tcp.port = exp-\u003etuple.dst.u.tcp.port;\ndiff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c\nindex 92002079f8eab6..88382e2108eb4b 100644\n--- a/net/netfilter/nfnetlink_osf.c\n+++ b/net/netfilter/nfnetlink_osf.c\n@@ -179,7 +179,7 @@ static const struct tcphdr *nf_osf_hdr_ctx_init(struct nf_osf_hdr_ctx *ctx,\n }\n \n bool\n-nf_osf_match(const struct sk_buff *skb, u_int8_t family,\n+nf_osf_match(const struct sk_buff *skb, u8 family,\n \t     int hooknum, struct net_device *in, struct net_device *out,\n \t     const struct nf_osf_info *info, struct net *net,\n \t     const struct list_head *nf_osf_fingers)\n"
}

2/1

2026/07/08 07:17

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.",
  "WorthFuzzing": false
}

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 6791894aed4fb3e8436591e6b983c23720849b03
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 8 07:17:18 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/linux/netfilter/nfnetlink_osf.h b/include/linux/netfilter/nfnetlink_osf.h
index 788613f3693590..d720abf59ca8f8 100644
--- a/include/linux/netfilter/nfnetlink_osf.h
+++ b/include/linux/netfilter/nfnetlink_osf.h
@@ -26,7 +26,7 @@ struct nf_osf_data {
 	const char *version;
 };
 
-bool nf_osf_match(const struct sk_buff *skb, u_int8_t family,
+bool nf_osf_match(const struct sk_buff *skb, u8 family,
 		  int hooknum, struct net_device *in, struct net_device *out,
 		  const struct nf_osf_info *info, struct net *net,
 		  const struct list_head *nf_osf_fingers);
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index d40b404c1bf646..1ae99766014825 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -882,7 +882,7 @@ static inline enum ip_defrag_users ip_vs_defrag_user(unsigned int hooknum)
 }
 
 static inline int ip_vs_gather_frags(struct netns_ipvs *ipvs,
-				     struct sk_buff *skb, u_int32_t user)
+				     struct sk_buff *skb, u32 user)
 {
 	int err;
 
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 0ff089e03891e6..87c9c6b92a6d40 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -935,7 +935,7 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff,
 	union nf_inet_addr *saddr;
 	struct nf_conntrack_tuple tuple;
 	int direct_rtp = 0, skip_expect = 0, ret = NF_DROP;
-	u_int16_t base_port;
+	u16 base_port;
 	__be16 rtp_port, rtcp_port;
 	const struct nf_nat_sip_hooks *hooks;
 	struct nf_conn_help *help;
diff --git a/net/netfilter/nf_nat_amanda.c b/net/netfilter/nf_nat_amanda.c
index 8f1054920a8571..fe054cb4fc0bc3 100644
--- a/net/netfilter/nf_nat_amanda.c
+++ b/net/netfilter/nf_nat_amanda.c
@@ -33,7 +33,7 @@ static unsigned int help(struct sk_buff *skb,
 			 struct nf_conntrack_expect *exp)
 {
 	char buffer[sizeof("65535")];
-	u_int16_t port;
+	u16 port;
 
 	/* Connection comes from client. */
 	exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
diff --git a/net/netfilter/nfnetlink_osf.c b/net/netfilter/nfnetlink_osf.c
index 92002079f8eab6..88382e2108eb4b 100644
--- a/net/netfilter/nfnetlink_osf.c
+++ b/net/netfilter/nfnetlink_osf.c
@@ -179,7 +179,7 @@ static const struct tcphdr *nf_osf_hdr_ctx_init(struct nf_osf_hdr_ctx *ctx,
 }
 
 bool
-nf_osf_match(const struct sk_buff *skb, u_int8_t family,
+nf_osf_match(const struct sk_buff *skb, u8 family,
 	     int hooknum, struct net_device *in, struct net_device *out,
 	     const struct nf_osf_info *info, struct net *net,
 	     const struct list_head *nf_osf_fingers)

3/2

2026/07/08 07:17

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2855
							output: 84
							thoughts: 205

Thoughts:

**Analyzing a Netfilter Patch**

Okay, so I'm looking at this patch and immediately see a pattern. It's changing those `u_int8_t`, `u_int32_t`, and `u_int16_t` types to their more modern `u8`, `u32`, and `u16` equivalents, respectively, across a bunch of netfilter files. Nothing too surprising – I've seen this kind of cleanup before.  The files affected are `nfnetlink_osf.h`, `ip_vs_core.c`, `nf_conntrack_sip.c`, `nf_nat_amanda.c`, and `nfnetlink_osf.c`.

It's clear that this is a purely cosmetic change; no actual execution logic is being altered here, just the type names. Given that, I don't see anything that would warrant a deeper dive. This is definitely not the kind of change that would introduce a functional bug or vulnerability. This is definitely something that I'm not going to spend time fuzzing over.

4/2

2026/07/08 07:17

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only replaces standard integer types (e.g., u_int8_t to u8, u_int32_t to u32) with their shorter equivalents. These are purely stylistic changes and do not functionally alter the execution flow.",
  "WorthFuzzing": false
}

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)