AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/08/01 15:59	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.", "WorthFuzzing": false }
1/1	2026/08/01 15:59	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 2136d21f71cdbbcce31f80d2030acc7549aa66a5\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Aug 1 15:59:37 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst\nindex ad8e7a41f3b5d..c329ca747b8c4 100644\n--- a/Documentation/admin-guide/mm/ksm.rst\n+++ b/Documentation/admin-guide/mm/ksm.rst\n@@ -174,7 +174,7 @@ advisor_mode\n The section about ``advisor`` explains in detail how the scan time\n advisor works.\n \n-adivsor_max_cpu\n+advisor_max_cpu\n specifies the upper limit of the cpu percent usage of the ksmd\n background thread. The default is 70.\n \n@@ -183,10 +183,10 @@ advisor_target_scan_time\n pages. The default value is 200 seconds.\n \n advisor_min_pages_to_scan\n- specifies the lower limit of the ``pages_to_scan`` parameter of the\n- scan time advisor. The default is 500.\n+ specifies the initial value of the ``pages_to_scan`` parameter of\n+ the scan time advisor. The default is 500.\n \n-adivsor_max_pages_to_scan\n+advisor_max_pages_to_scan\n specifies the upper limit of the ``pages_to_scan`` parameter of the\n scan time advisor. The default is 30000.\n \ndiff --git a/mm/ksm.c b/mm/ksm.c\nindex 7d5b76478f0b6..1e3a9c657a640 100644\n--- a/mm/ksm.c\n+++ b/mm/ksm.c\n@@ -342,7 +342,7 @@ static enum ksm_advisor_type ksm_advisor;\n * Only called through the sysfs control interface:\n /\n \n-/ At least scan this many pages per batch. /\n+/ Initial number of pages to scan per batch when the scan-time advisor is enabled. */\n static unsigned long ksm_advisor_min_pages_to_scan = 500;\n \n static void set_advisor_defaults(void)\n" }
2/1	2026/08/01 15:59	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.", "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 2136d21f71cdbbcce31f80d2030acc7549aa66a5 Author: syz-cluster <triage@syzkaller.com> Date: Sat Aug 1 15:59:37 2026 +0000 syz-cluster: applied patch under review diff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst index ad8e7a41f3b5d..c329ca747b8c4 100644 --- a/Documentation/admin-guide/mm/ksm.rst +++ b/Documentation/admin-guide/mm/ksm.rst @@ -174,7 +174,7 @@ advisor_mode The section about ``advisor`` explains in detail how the scan time advisor works. -adivsor_max_cpu +advisor_max_cpu specifies the upper limit of the cpu percent usage of the ksmd background thread. The default is 70. @@ -183,10 +183,10 @@ advisor_target_scan_time pages. The default value is 200 seconds. advisor_min_pages_to_scan - specifies the lower limit of the ``pages_to_scan`` parameter of the - scan time advisor. The default is 500. + specifies the initial value of the ``pages_to_scan`` parameter of + the scan time advisor. The default is 500. -adivsor_max_pages_to_scan +advisor_max_pages_to_scan specifies the upper limit of the ``pages_to_scan`` parameter of the scan time advisor. The default is 30000. diff --git a/mm/ksm.c b/mm/ksm.c index 7d5b76478f0b6..1e3a9c657a640 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -342,7 +342,7 @@ static enum ksm_advisor_type ksm_advisor; * Only called through the sysfs control interface: / -/ At least scan this many pages per batch. / +/ Initial number of pages to scan per batch when the scan-time advisor is enabled. */ static unsigned long ksm_advisor_min_pages_to_scan = 500; static void set_advisor_defaults(void)
3/2	2026/08/01 15:59	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2400 output: 50 thoughts: 160 Thoughts: Analyzing this Patch for WorthFuzzing Okay, so I'm looking at this patch and my initial assessment is pretty straightforward. It looks like the changes are confined to documentation and a single comment in the kernel code itself. Specifically, the patch touches `Documentation/admin-guide/mm/ksm.rst` and `mm/ksm.c`. The change in `mm/ksm.c` is minor; it's just a comment update: the comment describing `ksm_advisor_min_pages_to_scan` is being slightly reworded. Nothing functionally changes. The documentation fix in `ksm.rst` likely corrects some typos or clarifies existing text related to KSM, the kernel same-page merging feature. Given these observations, my analysis leads me to a clear conclusion: this patch, in all likelihood, should not be considered for fuzzing. The modifications are non-functional; there's no alteration of behavior or logic that would introduce new attack surfaces or vulnerabilities. It's essentially documentation improvements, and I'd classify it as a "no-op" in terms of introducing exploitable conditions. WorthFuzzing is definitely false for this patch.
4/2	2026/08/01 15:59	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/08/01 15:59

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.",
  "WorthFuzzing": false
}

1/1

2026/08/01 15:59

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 2136d21f71cdbbcce31f80d2030acc7549aa66a5\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Aug 1 15:59:37 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst\nindex ad8e7a41f3b5d..c329ca747b8c4 100644\n--- a/Documentation/admin-guide/mm/ksm.rst\n+++ b/Documentation/admin-guide/mm/ksm.rst\n@@ -174,7 +174,7 @@ advisor_mode\n         The section about ``advisor`` explains in detail how the scan time\n         advisor works.\n \n-adivsor_max_cpu\n+advisor_max_cpu\n         specifies the upper limit of the cpu percent usage of the ksmd\n         background thread. The default is 70.\n \n@@ -183,10 +183,10 @@ advisor_target_scan_time\n         pages. The default value is 200 seconds.\n \n advisor_min_pages_to_scan\n-        specifies the lower limit of the ``pages_to_scan`` parameter of the\n-        scan time advisor. The default is 500.\n+        specifies the initial value of the ``pages_to_scan`` parameter of\n+        the scan time advisor. The default is 500.\n \n-adivsor_max_pages_to_scan\n+advisor_max_pages_to_scan\n         specifies the upper limit of the ``pages_to_scan`` parameter of the\n         scan time advisor. The default is 30000.\n \ndiff --git a/mm/ksm.c b/mm/ksm.c\nindex 7d5b76478f0b6..1e3a9c657a640 100644\n--- a/mm/ksm.c\n+++ b/mm/ksm.c\n@@ -342,7 +342,7 @@ static enum ksm_advisor_type ksm_advisor;\n  * Only called through the sysfs control interface:\n  */\n \n-/* At least scan this many pages per batch. */\n+/* Initial number of pages to scan per batch when the scan-time advisor is enabled. */\n static unsigned long ksm_advisor_min_pages_to_scan = 500;\n \n static void set_advisor_defaults(void)\n"
}

2/1

2026/08/01 15:59

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.",
  "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 2136d21f71cdbbcce31f80d2030acc7549aa66a5
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Aug 1 15:59:37 2026 +0000

    syz-cluster: applied patch under review

diff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst
index ad8e7a41f3b5d..c329ca747b8c4 100644
--- a/Documentation/admin-guide/mm/ksm.rst
+++ b/Documentation/admin-guide/mm/ksm.rst
@@ -174,7 +174,7 @@ advisor_mode
         The section about ``advisor`` explains in detail how the scan time
         advisor works.
 
-adivsor_max_cpu
+advisor_max_cpu
         specifies the upper limit of the cpu percent usage of the ksmd
         background thread. The default is 70.
 
@@ -183,10 +183,10 @@ advisor_target_scan_time
         pages. The default value is 200 seconds.
 
 advisor_min_pages_to_scan
-        specifies the lower limit of the ``pages_to_scan`` parameter of the
-        scan time advisor. The default is 500.
+        specifies the initial value of the ``pages_to_scan`` parameter of
+        the scan time advisor. The default is 500.
 
-adivsor_max_pages_to_scan
+advisor_max_pages_to_scan
         specifies the upper limit of the ``pages_to_scan`` parameter of the
         scan time advisor. The default is 30000.
 
diff --git a/mm/ksm.c b/mm/ksm.c
index 7d5b76478f0b6..1e3a9c657a640 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -342,7 +342,7 @@ static enum ksm_advisor_type ksm_advisor;
  * Only called through the sysfs control interface:
  */
 
-/* At least scan this many pages per batch. */
+/* Initial number of pages to scan per batch when the scan-time advisor is enabled. */
 static unsigned long ksm_advisor_min_pages_to_scan = 500;
 
 static void set_advisor_defaults(void)

3/2

2026/08/01 15:59

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2400
							output: 50
							thoughts: 160

Thoughts:

**Analyzing this Patch for WorthFuzzing**

Okay, so I'm looking at this patch and my initial assessment is pretty straightforward. It looks like the changes are confined to documentation and a single comment in the kernel code itself. Specifically, the patch touches `Documentation/admin-guide/mm/ksm.rst` and `mm/ksm.c`. The change in `mm/ksm.c` is minor; it's just a comment update: the comment describing `ksm_advisor_min_pages_to_scan` is being slightly reworded. Nothing functionally changes. The documentation fix in `ksm.rst` likely corrects some typos or clarifies existing text related to KSM, the kernel same-page merging feature.

Given these observations, my analysis leads me to a clear conclusion: this patch, in all likelihood, **should not be considered for fuzzing**. The modifications are non-functional; there's no alteration of behavior or logic that would introduce new attack surfaces or vulnerabilities. It's essentially documentation improvements, and I'd classify it as a "no-op" in terms of introducing exploitable conditions. WorthFuzzing is definitely false for this patch.

4/2

2026/08/01 15:59

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies documentation and a code comment. There are no functional changes to the kernel.",
  "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)