AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest in tools/testing/selftests/net/fin_ack_lat.c, which is not part of the kernel code itself.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit ffb504d3fbb1747220cf072c3194d03d82b44e8a\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Aug 1 23:33:05 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/fin_ack_lat.c b/tools/testing/selftests/net/fin_ack_lat.c\nindex 70187494b57af..4117332eb1a9c 100644\n--- a/tools/testing/selftests/net/fin_ack_lat.c\n+++ b/tools/testing/selftests/net/fin_ack_lat.c\n@@ -69,7 +69,7 @@ static void client(int port)\n \t\tlat = timediff(start, end);\n \t\tsum_lat += lat;\n \t\tnr_lat++;\n-\t\tif (lat \u003c 100000)\n+\t\tif (lat \u003c 1000000)\n \t\t\tgoto close;\n \n \t\tif (getsockname(sock, (struct sockaddr *)\u0026laddr, \u0026len) == -1)\n"
}

best-expensive

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest in tools/testing/selftests/net/fin_ack_lat.c, which is not part of the kernel code itself.",
  "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).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

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.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
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.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. 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 ffb504d3fbb1747220cf072c3194d03d82b44e8a
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Aug 1 23:33:05 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/net/fin_ack_lat.c b/tools/testing/selftests/net/fin_ack_lat.c
index 70187494b57af..4117332eb1a9c 100644
--- a/tools/testing/selftests/net/fin_ack_lat.c
+++ b/tools/testing/selftests/net/fin_ack_lat.c
@@ -69,7 +69,7 @@ static void client(int port)
 		lat = timediff(start, end);
 		sum_lat += lat;
 		nr_lat++;
-		if (lat < 100000)
+		if (lat < 1000000)
 			goto close;
 
 		if (getsockname(sock, (struct sockaddr *)&laddr, &len) == -1)

gemini-3.1-pro-preview

null

null

							input: 2076
							output: 67
							thoughts: 74
						

**WorthFuzzing=false: A Quick Decision**

Okay, looking at this patch, I can see it's touching `tools/testing/selftests/net/fin_ack_lat.c`.  Immediately, my expert eye tells me this is in the testing framework, which means it's a selftest. And yes, confirming my initial hunch, the diff is only modifying a constant *within* that selftest.  There's no actual kernel code being changed here; it's purely about test parameters. Given my understanding of fuzzing and what's worthwhile to subject it to, I'm already certain of my conclusion: this isn't code that needs to be fuzzed. It’s a self test, not production code. So, I will return `WorthFuzzing=false`. No fuzzing needed here; moving on.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest in tools/testing/selftests/net/fin_ack_lat.c, which is not part of the kernel code itself.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest in tools/testing/selftests/net/fin_ack_lat.c, which is not part of the kernel code itself.",
  "WorthFuzzing": false
}