AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds the `noinline_for_tracing` attribute to the `tcp_syn_ack_timeout` function. This is a purely decorative change intended for tracing purposes and does not functionally alter the execution flow of the kernel.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 8d48cad6186dea02d9c1854d8f34770011296480\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Thu Jul 9 11:55:58 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c\nindex bf171b5e1eb306..f7215d53bbda94 100644\n--- a/net/ipv4/tcp_timer.c\n+++ b/net/ipv4/tcp_timer.c\n@@ -748,7 +748,7 @@ static void tcp_write_timer(struct timer_list *t)\n \tsock_put(sk);\n }\n \n-void tcp_syn_ack_timeout(const struct request_sock *req)\n+noinline_for_tracing void tcp_syn_ack_timeout(const struct request_sock *req)\n {\n \tstruct net *net = read_pnet(\u0026inet_rsk(req)-\u003eireq_net);\n \n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds the `noinline_for_tracing` attribute to the `tcp_syn_ack_timeout` function. This is a purely decorative change intended for tracing purposes and does not functionally alter the execution flow of the kernel.",
  "WorthFuzzing": false
}

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 8d48cad6186dea02d9c1854d8f34770011296480
Author: syz-cluster <triage@syzkaller.com>
Date:   Thu Jul 9 11:55:58 2026 +0000

    syz-cluster: applied patch under review

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index bf171b5e1eb306..f7215d53bbda94 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -748,7 +748,7 @@ static void tcp_write_timer(struct timer_list *t)
 	sock_put(sk);
 }
 
-void tcp_syn_ack_timeout(const struct request_sock *req)
+noinline_for_tracing void tcp_syn_ack_timeout(const struct request_sock *req)
 {
 	struct net *net = read_pnet(&inet_rsk(req)->ireq_net);
 

gemini-3.1-pro-preview

null

null

							input: 1829
							output: 80
							thoughts: 241
						

**WorthFuzzing=False: Decorative Traceability Change**

Okay, so I've got this patch here. It's touching `net/ipv4/tcp_timer.c` and specifically adding `noinline_for_tracing` to the `tcp_syn_ack_timeout` function. Right away, this screams "traceability" change. I know what `noinline_for_tracing` does; it prevents the function from being inlined so it can be tracked more easily during debugging or performance analysis. This is purely for tracing; it's not actually *changing* how the kernel operates. It's not modifying the logic, just making it easier to see what's happening.

Let me just double-check, though, make sure there are *no* other changes creeping in... nope, it's literally *just* that line, `noinline_for_tracing void tcp_syn_ack_timeout(const struct request_sock *req)`.

Given that, I'm going to set `WorthFuzzing=false`. The patch is *only* adding that traceability hint. It's purely decorative. It doesn't alter any functional execution flow, so I'm not going to bother with this. It's just noise for fuzzing. I'll flag it and move on to the next patch. Let's call `set-results` and get this done.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds the `noinline_for_tracing` attribute to the `tcp_syn_ack_timeout` function. This is a purely decorative change intended for tracing purposes and does not functionally alter the execution flow of the kernel.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds the `noinline_for_tracing` attribute to the `tcp_syn_ack_timeout` function. This is a purely decorative change intended for tracing purposes and does not functionally alter the execution flow of the kernel.",
  "WorthFuzzing": false
}