AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest program in tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c, which does not affect the kernel runtime logic.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 4a63a87d16568168265b094e245c75584c833ed1\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 1 12:50:39 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c b/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c\nindex 0660f29dca9555..3177bc5b733ac4 100644\n--- a/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c\n+++ b/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c\n@@ -44,8 +44,18 @@ int bpf_prog2(struct __sk_buff *skb)\n \t__sink(lport);\n \t__sink(rport);\n \n-\tif (data + 8 \u003e data_end)\n-\t\treturn SK_DROP;\n+\tif (data + 8 \u003e data_end) {\n+\t\tif (bpf_skb_pull_data(skb, 8))\n+\t\t\treturn SK_DROP;\n+\n+\t\tdata = (void *)(long)skb-\u003edata;\n+\t\tdata_end = (void *)(long)skb-\u003edata_end;\n+\n+\t\tif (data + 8 \u003e data_end)\n+\t\t\treturn SK_DROP;\n+\n+\t\td = data;\n+\t}\n \n \tmap = d[0];\n \tsk = d[1];\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest program in tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c, which does not affect the kernel runtime logic.",
  "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 4a63a87d16568168265b094e245c75584c833ed1
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 1 12:50:39 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c b/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c
index 0660f29dca9555..3177bc5b733ac4 100644
--- a/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c
+++ b/tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c
@@ -44,8 +44,18 @@ int bpf_prog2(struct __sk_buff *skb)
 	__sink(lport);
 	__sink(rport);
 
-	if (data + 8 > data_end)
-		return SK_DROP;
+	if (data + 8 > data_end) {
+		if (bpf_skb_pull_data(skb, 8))
+			return SK_DROP;
+
+		data = (void *)(long)skb->data;
+		data_end = (void *)(long)skb->data_end;
+
+		if (data + 8 > data_end)
+			return SK_DROP;
+
+		d = data;
+	}
 
 	map = d[0];
 	sk = d[1];

gemini-3.1-pro-preview

null

null

							input: 1979
							output: 75
							thoughts: 194
						

**WorthFuzzing=False: BPF Selftest Modification**

Okay, let's break this down. This patch is touching `tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c`. Right away, I see this is a BPF *selftest* program, which immediately flags it as non-critical in terms of kernel functionality. It's adding a call to `bpf_skb_pull_data` with an offset, specifically checking for a boundary condition. The code is only running if the data pointer plus eight is beyond the end, making me double think its inclusion.

Given that this change is confined to a *selftest*, it's not actually altering the runtime kernel code itself, which is what I need to focus on for fuzzing. Selftests are, well, tests. They don't introduce any new functionality or modify core kernel behavior that would warrant fuzzing in a runtime context. No modifications outside of the test files, which makes my decision even easier.

Let me just confirm there's no other file modification. Nope, it's just that one file. Therefore, based on the information I have, I'm confident in returning `WorthFuzzing=false`. No need for deeper analysis.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest program in tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c, which does not affect the kernel runtime logic.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest program in tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c, which does not affect the kernel runtime logic.",
  "WorthFuzzing": false
}