AI Trajectory

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{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/proc/proc-maps-race.c) and does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

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{
  "PatchDiff": "commit 789f3ce9675a0da050967989ff08e51bba720791\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Aug 8 21:03:00 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/proc/proc-maps-race.c b/tools/testing/selftests/proc/proc-maps-race.c\nindex 1026d8c400e1b..415eccb704684 100644\n--- a/tools/testing/selftests/proc/proc-maps-race.c\n+++ b/tools/testing/selftests/proc/proc-maps-race.c\n@@ -490,7 +490,8 @@ static bool query_addr_at(int maps_fd, void *addr,\n \n static inline bool split_vma(FIXTURE_DATA(proc_maps_race) *self)\n {\n-\treturn mmap(self-\u003emod_info-\u003eaddr, self-\u003epage_size, self-\u003emod_info-\u003eprot | PROT_EXEC,\n+\t/* PROT_NONE differs from both readable neighbors. */\n+\treturn mmap(self-\u003emod_info-\u003eaddr, self-\u003epage_size, PROT_NONE,\n \t\t    MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0) != MAP_FAILED;\n }\n \n"
}

best-expensive

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{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/proc/proc-maps-race.c) and does not make any functional changes to 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 789f3ce9675a0da050967989ff08e51bba720791
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Aug 8 21:03:00 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/proc/proc-maps-race.c b/tools/testing/selftests/proc/proc-maps-race.c
index 1026d8c400e1b..415eccb704684 100644
--- a/tools/testing/selftests/proc/proc-maps-race.c
+++ b/tools/testing/selftests/proc/proc-maps-race.c
@@ -490,7 +490,8 @@ static bool query_addr_at(int maps_fd, void *addr,
 
 static inline bool split_vma(FIXTURE_DATA(proc_maps_race) *self)
 {
-	return mmap(self->mod_info->addr, self->page_size, self->mod_info->prot | PROT_EXEC,
+	/* PROT_NONE differs from both readable neighbors. */
+	return mmap(self->mod_info->addr, self->page_size, PROT_NONE,
 		    MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0) != MAP_FAILED;
 }
 

gemini-3.1-pro-preview

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							input: 2068
							output: 70
							thoughts: 63
						

**WorthFuzzing Decision**

Okay, so I'm looking at this patch and it's hitting `tools/testing/selftests/proc/proc-maps-race.c`. Immediately, my spidey senses are tingling - this isn't touching actual kernel code, is it? Nope. It's a *selftest*. Which, as we all know, is separate from the core functionality and isn't going to introduce any new fuzzing targets directly into the kernel itself. No functional changes, no need to fuzz this. So, considering everything, I'm marking this one as `WorthFuzzing=false`. Next!

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/proc/proc-maps-race.c) and does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/proc/proc-maps-race.c) and does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

{
  "WorthFuzzing": false
}

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