AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/08/15 09:39	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "KMSANReasoning": "", "NeedsKMSAN": false, "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.", "WorthFuzzing": false }
1/1	2026/08/15 09:39	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 227012739c0b61b310bc7ffa9f54ea4ab6c444d3\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Aug 15 09:39:30 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\nindex d019502444901..fda6a9340e0e5 100755\n--- a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\n+++ b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\n@@ -19,24 +19,31 @@\n #\n # Author: Breno Leitao \u003cleitao@debian.org\u003e\n \n-ksft_skip=4\n+# KTAP output helpers (ktap_test_pass, ktap_test_skip, ktap_test_fail, ...).\n+DIR=\"$(dirname \"$(readlink -f \"$0\")\")\"\n+# shellcheck source=../kselftest/ktap_helpers.sh\n+source \"${DIR}\"/../kselftest/ktap_helpers.sh\n+\n KMEMLEAK=/sys/kernel/debug/kmemleak\n VERBOSE_PARAM=/sys/module/kmemleak/parameters/verbose\n MODULE=kmemleak-test\n \n+ktap_print_header\n+ktap_set_plan 1\n+\n skip() {\n-\techo \"SKIP: $\"\n-\texit $ksft_skip\n+\tktap_test_skip \"$\"\n+\tktap_finished\n }\n \n fail() {\n-\techo \"FAIL: $\"\n-\texit 1\n+\tktap_test_fail \"$\"\n+\tktap_finished\n }\n \n pass() {\n-\techo \"PASS: $\"\n-\texit 0\n+\tktap_test_pass \"$\"\n+\tktap_finished\n }\n \n [ \"$(id -u)\" -eq 0 ] \|\| skip \"must run as root\"\n" }
2/1	2026/08/15 09:39	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.", "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 227012739c0b61b310bc7ffa9f54ea4ab6c444d3 Author: syz-cluster <triage@syzkaller.com> Date: Sat Aug 15 09:39:30 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh index d019502444901..fda6a9340e0e5 100755 --- a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh +++ b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh @@ -19,24 +19,31 @@ # # Author: Breno Leitao <leitao@debian.org> -ksft_skip=4 +# KTAP output helpers (ktap_test_pass, ktap_test_skip, ktap_test_fail, ...). +DIR="$(dirname "$(readlink -f "$0")")" +# shellcheck source=../kselftest/ktap_helpers.sh +source "${DIR}"/../kselftest/ktap_helpers.sh + KMEMLEAK=/sys/kernel/debug/kmemleak VERBOSE_PARAM=/sys/module/kmemleak/parameters/verbose MODULE=kmemleak-test +ktap_print_header +ktap_set_plan 1 + skip() { - echo "SKIP: $" - exit $ksft_skip + ktap_test_skip "$" + ktap_finished } fail() { - echo "FAIL: $" - exit 1 + ktap_test_fail "$" + ktap_finished } pass() { - echo "PASS: $" - exit 0 + ktap_test_pass "$" + ktap_finished } [ "$(id -u)" -eq 0 ] \|\| skip "must run as root"
3/2	2026/08/15 09:39	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2247 output: 82 thoughts: 191 Thoughts: Assessing the Fuzzing Impact Okay, so I've got this patch here that's touching the `tools/testing/selftests/mm/ksft_kmemleak_dedup.sh` script. My initial thought is that this looks like a purely testing-related change. It's using KTAP output helpers now. The critical point is that it's not altering any core kernel code, just how a self-test is performed. Therefore, based on that, I'm leaning towards `WorthFuzzing=false`. I need to be sure, though. Let's quickly verify that the diff only hits that single file. Yep, a quick look shows the diff header only references the aforementioned script. Confirmed. No kernel code changes. Therefore, my assessment stands: I'm returning `WorthFuzzing=false`. This isn't a functional change impacting the kernel's behavior that would necessitate fuzzing.
4/2	2026/08/15 09:39	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.", "WorthFuzzing": false }
5/1	2026/08/15 09:39	action	If	0m Args: { "WorthFuzzing": false } Results: null

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/08/15 09:39

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

1/1

2026/08/15 09:39

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 227012739c0b61b310bc7ffa9f54ea4ab6c444d3\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Aug 15 09:39:30 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\nindex d019502444901..fda6a9340e0e5 100755\n--- a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\n+++ b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh\n@@ -19,24 +19,31 @@\n #\n # Author: Breno Leitao \u003cleitao@debian.org\u003e\n \n-ksft_skip=4\n+# KTAP output helpers (ktap_test_pass, ktap_test_skip, ktap_test_fail, ...).\n+DIR=\"$(dirname \"$(readlink -f \"$0\")\")\"\n+# shellcheck source=../kselftest/ktap_helpers.sh\n+source \"${DIR}\"/../kselftest/ktap_helpers.sh\n+\n KMEMLEAK=/sys/kernel/debug/kmemleak\n VERBOSE_PARAM=/sys/module/kmemleak/parameters/verbose\n MODULE=kmemleak-test\n \n+ktap_print_header\n+ktap_set_plan 1\n+\n skip() {\n-\techo \"SKIP: $*\"\n-\texit $ksft_skip\n+\tktap_test_skip \"$*\"\n+\tktap_finished\n }\n \n fail() {\n-\techo \"FAIL: $*\"\n-\texit 1\n+\tktap_test_fail \"$*\"\n+\tktap_finished\n }\n \n pass() {\n-\techo \"PASS: $*\"\n-\texit 0\n+\tktap_test_pass \"$*\"\n+\tktap_finished\n }\n \n [ \"$(id -u)\" -eq 0 ] || skip \"must run as root\"\n"
}

2/1

2026/08/15 09:39

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.",
  "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 227012739c0b61b310bc7ffa9f54ea4ab6c444d3
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Aug 15 09:39:30 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh
index d019502444901..fda6a9340e0e5 100755
--- a/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh
+++ b/tools/testing/selftests/mm/ksft_kmemleak_dedup.sh
@@ -19,24 +19,31 @@
 #
 # Author: Breno Leitao <leitao@debian.org>
 
-ksft_skip=4
+# KTAP output helpers (ktap_test_pass, ktap_test_skip, ktap_test_fail, ...).
+DIR="$(dirname "$(readlink -f "$0")")"
+# shellcheck source=../kselftest/ktap_helpers.sh
+source "${DIR}"/../kselftest/ktap_helpers.sh
+
 KMEMLEAK=/sys/kernel/debug/kmemleak
 VERBOSE_PARAM=/sys/module/kmemleak/parameters/verbose
 MODULE=kmemleak-test
 
+ktap_print_header
+ktap_set_plan 1
+
 skip() {
-	echo "SKIP: $*"
-	exit $ksft_skip
+	ktap_test_skip "$*"
+	ktap_finished
 }
 
 fail() {
-	echo "FAIL: $*"
-	exit 1
+	ktap_test_fail "$*"
+	ktap_finished
 }
 
 pass() {
-	echo "PASS: $*"
-	exit 0
+	ktap_test_pass "$*"
+	ktap_finished
 }
 
 [ "$(id -u)" -eq 0 ] || skip "must run as root"

3/2

2026/08/15 09:39

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2247
							output: 82
							thoughts: 191

Thoughts:

**Assessing the Fuzzing Impact**

Okay, so I've got this patch here that's touching the `tools/testing/selftests/mm/ksft_kmemleak_dedup.sh` script. My initial thought is that this looks like a purely testing-related change. It's using KTAP output helpers now. The critical point is that it's *not* altering any core kernel code, just how a self-test is performed. Therefore, based on that, I'm leaning towards `WorthFuzzing=false`. I need to be sure, though.

Let's quickly verify that the diff only hits that single file. Yep, a quick look shows the diff header only references the aforementioned script. Confirmed. No kernel code changes. Therefore, my assessment stands: I'm returning `WorthFuzzing=false`. This isn't a functional change impacting the kernel's behavior that would necessitate fuzzing.

4/2

2026/08/15 09:39

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest script (tools/testing/selftests/mm/ksft_kmemleak_dedup.sh) to use KTAP output helpers. It does not make any functional changes to the kernel code itself.",
  "WorthFuzzing": false
}

5/1

2026/08/15 09:39

action

Args:

{
  "WorthFuzzing": false
}

Results:

null

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)