AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/25 11:33	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.", "WorthFuzzing": false }
1/1	2026/07/25 11:33	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit e72c2dae66b5832ffac992c19065466d0a3fab5a\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Jul 25 11:33:04 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c\nindex eb8963e9d98f06..c03b4f8910c0e7 100644\n--- a/tools/testing/selftests/mm/gup_longterm.c\n+++ b/tools/testing/selftests/mm/gup_longterm.c\n@@ -196,7 +196,7 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared)\n \t\targs.flags \|= rw ? PIN_LONGTERM_TEST_FLAG_USE_WRITE : 0;\n \t\tret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, \u0026args);\n \t\tif (ret \u0026\u0026 errno == EINVAL) {\n-\t\t\tksft_print_msg(\"PIN_LONGTERM_TEST_START failed (EINVAL)n\");\n+\t\t\tksft_print_msg(\"PIN_LONGTERM_TEST_START failed (EINVAL)\\n\");\n \t\t\tresult = KSFT_SKIP;\n \t\t\tbreak;\n \t\t} else if (ret \u0026\u0026 errno == EFAULT) {\n" }
2/1	2026/07/25 11:33	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.", "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). - 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. Prompt: For your convenience, here is the diff of the changes: commit e72c2dae66b5832ffac992c19065466d0a3fab5a Author: syz-cluster <triage@syzkaller.com> Date: Sat Jul 25 11:33:04 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c index eb8963e9d98f06..c03b4f8910c0e7 100644 --- a/tools/testing/selftests/mm/gup_longterm.c +++ b/tools/testing/selftests/mm/gup_longterm.c @@ -196,7 +196,7 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) args.flags \|= rw ? PIN_LONGTERM_TEST_FLAG_USE_WRITE : 0; ret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, &args); if (ret && errno == EINVAL) { - ksft_print_msg("PIN_LONGTERM_TEST_START failed (EINVAL)n"); + ksft_print_msg("PIN_LONGTERM_TEST_START failed (EINVAL)\n"); result = KSFT_SKIP; break; } else if (ret && errno == EFAULT) {
3/2	2026/07/25 11:33	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2140 output: 72 thoughts: 68 Thoughts: Minor Patch Analysis: gup_longterm.c Typos Okay, so I've just reviewed this patch. It's touching `tools/testing/selftests/mm/gup_longterm.c`, which, as we know, houses memory management selftests. The good news is, it's a very minor change. The diff is just a cosmetic fix, a simple typo correction. Specifically, it's swapping a literal `n` in a `printk` statement with a proper newline, `\n`. Since it's just a print statement within a selftest, it's purely decorative. It's not impacting any core kernel logic or altering any behavior that matters in a functional sense. Given that, I'm comfortable saying that this doesn't warrant any special fuzzing effort. "WorthFuzzing" should definitely be `false` in this instance. Let's move on.
4/2	2026/07/25 11:33	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/25 11:33

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.",
  "WorthFuzzing": false
}

1/1

2026/07/25 11:33

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit e72c2dae66b5832ffac992c19065466d0a3fab5a\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Jul 25 11:33:04 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c\nindex eb8963e9d98f06..c03b4f8910c0e7 100644\n--- a/tools/testing/selftests/mm/gup_longterm.c\n+++ b/tools/testing/selftests/mm/gup_longterm.c\n@@ -196,7 +196,7 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared)\n \t\targs.flags |= rw ? PIN_LONGTERM_TEST_FLAG_USE_WRITE : 0;\n \t\tret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, \u0026args);\n \t\tif (ret \u0026\u0026 errno == EINVAL) {\n-\t\t\tksft_print_msg(\"PIN_LONGTERM_TEST_START failed (EINVAL)n\");\n+\t\t\tksft_print_msg(\"PIN_LONGTERM_TEST_START failed (EINVAL)\\n\");\n \t\t\tresult = KSFT_SKIP;\n \t\t\tbreak;\n \t\t} else if (ret \u0026\u0026 errno == EFAULT) {\n"
}

2/1

2026/07/25 11:33

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.",
  "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).
- 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.

Prompt:

For your convenience, here is the diff of the changes:
commit e72c2dae66b5832ffac992c19065466d0a3fab5a
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Jul 25 11:33:04 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index eb8963e9d98f06..c03b4f8910c0e7 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -196,7 +196,7 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared)
 		args.flags |= rw ? PIN_LONGTERM_TEST_FLAG_USE_WRITE : 0;
 		ret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, &args);
 		if (ret && errno == EINVAL) {
-			ksft_print_msg("PIN_LONGTERM_TEST_START failed (EINVAL)n");
+			ksft_print_msg("PIN_LONGTERM_TEST_START failed (EINVAL)\n");
 			result = KSFT_SKIP;
 			break;
 		} else if (ret && errno == EFAULT) {

3/2

2026/07/25 11:33

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2140
							output: 72
							thoughts: 68

Thoughts:

**Minor Patch Analysis: gup_longterm.c Typos**

Okay, so I've just reviewed this patch. It's touching `tools/testing/selftests/mm/gup_longterm.c`, which, as we know, houses memory management selftests. The good news is, it's a *very* minor change. The diff is just a cosmetic fix, a simple typo correction. Specifically, it's swapping a literal `n` in a `printk` statement with a proper newline, `\n`.

Since it's just a print statement within a selftest, it's purely decorative. It's not impacting any core kernel logic or altering any behavior that matters in a functional sense. Given that, I'm comfortable saying that this doesn't warrant any special fuzzing effort. "WorthFuzzing" should definitely be `false` in this instance. Let's move on.

4/2

2026/07/25 11:33

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only fixes a typo in a print statement in a selftest (tools/testing/selftests/mm/gup_longterm.c). It does not modify any kernel logic.",
  "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)