AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/06/24 14:16	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/net/tls.c) and does not make any functional changes to the kernel code itself.", "WorthFuzzing": false }
1/1	2026/06/24 14:16	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 4abd64c3ee50a54270f7dd702d131b061f447a0c\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Wed Jun 24 14:16:04 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c\nindex 30a236b8e9f733..d805a7dfbdd512 100644\n--- a/tools/testing/selftests/net/tls.c\n+++ b/tools/testing/selftests/net/tls.c\n@@ -997,6 +997,8 @@ TEST_F(tls, splice_short)\n \tchar sendbuf[0x100];\n \tchar sendchar = 'S';\n \tint pipefds[2];\n+\tint pipe_sz;\n+\tint ret;\n \tint i;\n \n \tsendchar_iov.iov_base = \u0026sendchar;\n@@ -1005,7 +1007,11 @@ TEST_F(tls, splice_short)\n \tmemset(sendbuf, 's', sizeof(sendbuf));\n \n \tASSERT_GE(pipe2(pipefds, O_NONBLOCK), 0);\n-\tASSERT_GE(fcntl(pipefds[0], F_SETPIPE_SZ, (MAX_FRAGS + 1) * 0x1000), 0);\n+\tpipe_sz = (MAX_FRAGS + 1) * getpagesize();\n+\tret = fcntl(pipefds[0], F_SETPIPE_SZ, pipe_sz);\n+\tif (ret \u003c 0 \u0026\u0026 errno == EPERM)\n+\t\tSKIP(return, \"insufficient pipe capacity\");\n+\tASSERT_GE(ret, pipe_sz);\n \n \tfor (i = 0; i \u003c MAX_FRAGS; i++)\n \t\tASSERT_GE(vmsplice(pipefds[1], \u0026sendchar_iov, 1, 0), 0);\n" }
2/1	2026/06/24 14:16	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/net/tls.c) and 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). 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 4abd64c3ee50a54270f7dd702d131b061f447a0c Author: syz-cluster <triage@syzkaller.com> Date: Wed Jun 24 14:16:04 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c index 30a236b8e9f733..d805a7dfbdd512 100644 --- a/tools/testing/selftests/net/tls.c +++ b/tools/testing/selftests/net/tls.c @@ -997,6 +997,8 @@ TEST_F(tls, splice_short) char sendbuf[0x100]; char sendchar = 'S'; int pipefds[2]; + int pipe_sz; + int ret; int i; sendchar_iov.iov_base = &sendchar; @@ -1005,7 +1007,11 @@ TEST_F(tls, splice_short) memset(sendbuf, 's', sizeof(sendbuf)); ASSERT_GE(pipe2(pipefds, O_NONBLOCK), 0); - ASSERT_GE(fcntl(pipefds[0], F_SETPIPE_SZ, (MAX_FRAGS + 1) * 0x1000), 0); + pipe_sz = (MAX_FRAGS + 1) * getpagesize(); + ret = fcntl(pipefds[0], F_SETPIPE_SZ, pipe_sz); + if (ret < 0 && errno == EPERM) + SKIP(return, "insufficient pipe capacity"); + ASSERT_GE(ret, pipe_sz); for (i = 0; i < MAX_FRAGS; i++) ASSERT_GE(vmsplice(pipefds[1], &sendchar_iov, 1, 0), 0);
3/2	2026/06/24 14:16	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2076 output: 66 thoughts: 83 Thoughts: WorthFuzzing=False: Analysis of TLS Selftest Patch Okay, so this patch is touching `tools/testing/selftests/net/tls.c`. My initial reaction is that this is selftests, not core kernel code. We're looking at modifications to the `splice_short` test case within the TLS selftests, specifically. Crucially, it's not touching the kernel source itself. Given my understanding of fuzzing and what's worth the investment, this is a clear "WorthFuzzing=false" scenario. This patch doesn't introduce any new functionality or potential security vulnerabilities within the kernel itself. It's a test case change, designed to ensure proper behavior in a controlled environment, but it doesn't affect the code that requires rigorous fuzzing. No functional changes, no fuzzing investment. Moving on.
4/2	2026/06/24 14:16	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/net/tls.c) and does not make any functional changes to the kernel code itself.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/net/tls.c) and does not make any functional changes to the kernel code itself.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/06/24 14:16

flow

patch-triage

Args:

null

Results:

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

1/1

2026/06/24 14:16

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 4abd64c3ee50a54270f7dd702d131b061f447a0c\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jun 24 14:16:04 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c\nindex 30a236b8e9f733..d805a7dfbdd512 100644\n--- a/tools/testing/selftests/net/tls.c\n+++ b/tools/testing/selftests/net/tls.c\n@@ -997,6 +997,8 @@ TEST_F(tls, splice_short)\n \tchar sendbuf[0x100];\n \tchar sendchar = 'S';\n \tint pipefds[2];\n+\tint pipe_sz;\n+\tint ret;\n \tint i;\n \n \tsendchar_iov.iov_base = \u0026sendchar;\n@@ -1005,7 +1007,11 @@ TEST_F(tls, splice_short)\n \tmemset(sendbuf, 's', sizeof(sendbuf));\n \n \tASSERT_GE(pipe2(pipefds, O_NONBLOCK), 0);\n-\tASSERT_GE(fcntl(pipefds[0], F_SETPIPE_SZ, (MAX_FRAGS + 1) * 0x1000), 0);\n+\tpipe_sz = (MAX_FRAGS + 1) * getpagesize();\n+\tret = fcntl(pipefds[0], F_SETPIPE_SZ, pipe_sz);\n+\tif (ret \u003c 0 \u0026\u0026 errno == EPERM)\n+\t\tSKIP(return, \"insufficient pipe capacity\");\n+\tASSERT_GE(ret, pipe_sz);\n \n \tfor (i = 0; i \u003c MAX_FRAGS; i++)\n \t\tASSERT_GE(vmsplice(pipefds[1], \u0026sendchar_iov, 1, 0), 0);\n"
}

2/1

2026/06/24 14:16

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a selftest (tools/testing/selftests/net/tls.c) and 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).

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 4abd64c3ee50a54270f7dd702d131b061f447a0c
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jun 24 14:16:04 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 30a236b8e9f733..d805a7dfbdd512 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -997,6 +997,8 @@ TEST_F(tls, splice_short)
 	char sendbuf[0x100];
 	char sendchar = 'S';
 	int pipefds[2];
+	int pipe_sz;
+	int ret;
 	int i;
 
 	sendchar_iov.iov_base = &sendchar;
@@ -1005,7 +1007,11 @@ TEST_F(tls, splice_short)
 	memset(sendbuf, 's', sizeof(sendbuf));
 
 	ASSERT_GE(pipe2(pipefds, O_NONBLOCK), 0);
-	ASSERT_GE(fcntl(pipefds[0], F_SETPIPE_SZ, (MAX_FRAGS + 1) * 0x1000), 0);
+	pipe_sz = (MAX_FRAGS + 1) * getpagesize();
+	ret = fcntl(pipefds[0], F_SETPIPE_SZ, pipe_sz);
+	if (ret < 0 && errno == EPERM)
+		SKIP(return, "insufficient pipe capacity");
+	ASSERT_GE(ret, pipe_sz);
 
 	for (i = 0; i < MAX_FRAGS; i++)
 		ASSERT_GE(vmsplice(pipefds[1], &sendchar_iov, 1, 0), 0);

3/2

2026/06/24 14:16

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2076
							output: 66
							thoughts: 83

Thoughts:

**WorthFuzzing=False: Analysis of TLS Selftest Patch**

Okay, so this patch is touching `tools/testing/selftests/net/tls.c`. My initial reaction is that this is *selftests*, not core kernel code. We're looking at modifications to the `splice_short` test case within the TLS selftests, specifically. Crucially, it's *not* touching the kernel source itself.

Given my understanding of fuzzing and what's worth the investment, this is a clear "WorthFuzzing=false" scenario. This patch doesn't introduce any new functionality or potential security vulnerabilities within the *kernel itself*. It's a test case change, designed to ensure proper behavior in a controlled environment, but it doesn't affect the code that requires rigorous fuzzing. No functional changes, no fuzzing investment. Moving on.

4/2

2026/06/24 14:16

tool

set-results

Args:

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

Results:

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