AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/06/26 19:35	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.", "WorthFuzzing": false }
1/1	2026/06/26 19:35	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit f05ba949f42473e0e15fd9109d66a70ee13eb632\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Fri Jun 26 19:35:09 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh\nindex b40694573f4c7d..fcaec058be6d09 100644\n--- a/tools/testing/selftests/net/lib.sh\n+++ b/tools/testing/selftests/net/lib.sh\n@@ -70,12 +70,27 @@ ksft_exit_status_merge()\n \t\t$ksft_xfail $ksft_pass $ksft_skip $ksft_fail\n }\n \n+timestamp_ms()\n+{\n+\tlocal now=$(date -u +%s:%N)\n+\tlocal seconds=${now%:}\n+\tlocal nanoseconds=${now#:}\n+\n+\tif [[ $nanoseconds =~ ^[0-9]+$ ]]; then\n+\t\tnanoseconds=${nanoseconds:0:9}\n+\telse\n+\t\tnanoseconds=0\n+\tfi\n+\n+\techo $((seconds * 1000 + 10#$nanoseconds / 1000000))\n+}\n+\n loopy_wait()\n {\n \tlocal sleep_cmd=$1; shift\n \tlocal timeout_ms=$1; shift\n \n-\tlocal start_time=\"$(date -u +%s%3N)\"\n+\tlocal start_time=$(timestamp_ms)\n \twhile true\n \tdo\n \t\tlocal out\n@@ -84,7 +99,7 @@ loopy_wait()\n \t\t\treturn 0\n \t\tfi\n \n-\t\tlocal current_time=\"$(date -u +%s%3N)\"\n+\t\tlocal current_time=$(timestamp_ms)\n \t\tif ((current_time - start_time \u003e timeout_ms)); then\n \t\t\techo -n \"$out\"\n \t\t\treturn 1\n" }
2/1	2026/06/26 19:35	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.", "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). 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. 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. Do not list too generic configs (we already have them enabled). Only list those that specifically cover the modified code. 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 f05ba949f42473e0e15fd9109d66a70ee13eb632 Author: syz-cluster <triage@syzkaller.com> Date: Fri Jun 26 19:35:09 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index b40694573f4c7d..fcaec058be6d09 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -70,12 +70,27 @@ ksft_exit_status_merge() $ksft_xfail $ksft_pass $ksft_skip $ksft_fail } +timestamp_ms() +{ + local now=$(date -u +%s:%N) + local seconds=${now%:} + local nanoseconds=${now#:} + + if [[ $nanoseconds =~ ^[0-9]+$ ]]; then + nanoseconds=${nanoseconds:0:9} + else + nanoseconds=0 + fi + + echo $((seconds * 1000 + 10#$nanoseconds / 1000000)) +} + loopy_wait() { local sleep_cmd=$1; shift local timeout_ms=$1; shift - local start_time="$(date -u +%s%3N)" + local start_time=$(timestamp_ms) while true do local out @@ -84,7 +99,7 @@ loopy_wait() return 0 fi - local current_time="$(date -u +%s%3N)" + local current_time=$(timestamp_ms) if ((current_time - start_time > timeout_ms)); then echo -n "$out" return 1
3/2	2026/06/26 19:35	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2074 output: 61 thoughts: 103 Thoughts: Assessing the Fuzzing Relevance of a Testing Script Modification Okay, so I'm looking at this patch and immediately, my assessment is that this doesn't warrant fuzzing. The patch is touching `tools/testing/selftests/net/lib.sh`, which is a testing script – nothing directly related to the kernel core. It seems they're adding a `timestamp_ms` function and swapping out the old `date` command within `loopy_wait`. While this is a code change, and a potentially interesting one, it’s not in the kernel proper. It’s a helper function used for testing. My initial reaction is definitely "WorthFuzzing=false". I need to be efficient and prioritize kernel-level components and interfaces. This change falls way outside of that. It's a useful improvement, sure, but not something that requires the resources of fuzzing. My focus remains on the core attack surface.
4/2	2026/06/26 19:35	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/06/26 19:35

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.",
  "WorthFuzzing": false
}

1/1

2026/06/26 19:35

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit f05ba949f42473e0e15fd9109d66a70ee13eb632\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jun 26 19:35:09 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh\nindex b40694573f4c7d..fcaec058be6d09 100644\n--- a/tools/testing/selftests/net/lib.sh\n+++ b/tools/testing/selftests/net/lib.sh\n@@ -70,12 +70,27 @@ ksft_exit_status_merge()\n \t\t$ksft_xfail $ksft_pass $ksft_skip $ksft_fail\n }\n \n+timestamp_ms()\n+{\n+\tlocal now=$(date -u +%s:%N)\n+\tlocal seconds=${now%:*}\n+\tlocal nanoseconds=${now#*:}\n+\n+\tif [[ $nanoseconds =~ ^[0-9]+$ ]]; then\n+\t\tnanoseconds=${nanoseconds:0:9}\n+\telse\n+\t\tnanoseconds=0\n+\tfi\n+\n+\techo $((seconds * 1000 + 10#$nanoseconds / 1000000))\n+}\n+\n loopy_wait()\n {\n \tlocal sleep_cmd=$1; shift\n \tlocal timeout_ms=$1; shift\n \n-\tlocal start_time=\"$(date -u +%s%3N)\"\n+\tlocal start_time=$(timestamp_ms)\n \twhile true\n \tdo\n \t\tlocal out\n@@ -84,7 +99,7 @@ loopy_wait()\n \t\t\treturn 0\n \t\tfi\n \n-\t\tlocal current_time=\"$(date -u +%s%3N)\"\n+\t\tlocal current_time=$(timestamp_ms)\n \t\tif ((current_time - start_time \u003e timeout_ms)); then\n \t\t\techo -n \"$out\"\n \t\t\treturn 1\n"
}

2/1

2026/06/26 19:35

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.",
  "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).

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.
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.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. 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 f05ba949f42473e0e15fd9109d66a70ee13eb632
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jun 26 19:35:09 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index b40694573f4c7d..fcaec058be6d09 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -70,12 +70,27 @@ ksft_exit_status_merge()
 		$ksft_xfail $ksft_pass $ksft_skip $ksft_fail
 }
 
+timestamp_ms()
+{
+	local now=$(date -u +%s:%N)
+	local seconds=${now%:*}
+	local nanoseconds=${now#*:}
+
+	if [[ $nanoseconds =~ ^[0-9]+$ ]]; then
+		nanoseconds=${nanoseconds:0:9}
+	else
+		nanoseconds=0
+	fi
+
+	echo $((seconds * 1000 + 10#$nanoseconds / 1000000))
+}
+
 loopy_wait()
 {
 	local sleep_cmd=$1; shift
 	local timeout_ms=$1; shift
 
-	local start_time="$(date -u +%s%3N)"
+	local start_time=$(timestamp_ms)
 	while true
 	do
 		local out
@@ -84,7 +99,7 @@ loopy_wait()
 			return 0
 		fi
 
-		local current_time="$(date -u +%s%3N)"
+		local current_time=$(timestamp_ms)
 		if ((current_time - start_time > timeout_ms)); then
 			echo -n "$out"
 			return 1

3/2

2026/06/26 19:35

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2074
							output: 61
							thoughts: 103

Thoughts:

**Assessing the Fuzzing Relevance of a Testing Script Modification**

Okay, so I'm looking at this patch and immediately, my assessment is that this doesn't warrant fuzzing. The patch is touching `tools/testing/selftests/net/lib.sh`, which is a testing script – nothing directly related to the kernel core. It seems they're adding a `timestamp_ms` function and swapping out the old `date` command within `loopy_wait`. While this is a code change, and a potentially interesting one, it’s not in the kernel proper. It’s a helper function used for testing. My initial reaction is definitely "WorthFuzzing=false". I need to be efficient and prioritize kernel-level components and interfaces. This change falls way outside of that. It's a useful improvement, sure, but not something that requires the resources of fuzzing. My focus remains on the core attack surface.

4/2

2026/06/26 19:35

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a testing script in tools/testing/selftests/net/lib.sh and does not change any kernel source code.",
  "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)