AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/22 21:40	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.", "WorthFuzzing": false }
1/1	2026/07/22 21:40	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit b716c246cf3f4d923aa8da08ded17e5955f2cb24\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Wed Jul 22 21:40:21 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h\nindex 67ff7882299ec5..ff37ae5a113dcc 100644\n--- a/tools/testing/selftests/bpf/bpf_experimental.h\n+++ b/tools/testing/selftests/bpf/bpf_experimental.h\n@@ -425,6 +425,8 @@ static inline int get_preempt_count(void)\n \treturn bpf_get_lowcore()-\u003epreempt_count;\n #elif defined(bpf_target_loongarch)\n \treturn bpf_get_current_task_btf()-\u003ethread_info.preempt_count;\n+#elif defined(bpf_target_riscv)\n+\treturn bpf_get_current_task_btf()-\u003ethread_info.preempt_count;\n #endif\n \treturn 0;\n }\n@@ -436,6 +438,7 @@ static inline int get_preempt_count(void)\n \t powerpc64\n \t s390x\n \t loongarch\n+ \t riscv\n /\n static inline int bpf_in_interrupt(void)\n {\n@@ -458,6 +461,7 @@ static inline int bpf_in_interrupt(void)\n \t* powerpc64\n \t s390x\n \t loongarch\n+ \t riscv\n /\n static inline int bpf_in_nmi(void)\n {\n@@ -471,6 +475,7 @@ static inline int bpf_in_nmi(void)\n \t* powerpc64\n \t s390x\n \t loongarch\n+ \t riscv\n /\n static inline int bpf_in_hardirq(void)\n {\n@@ -484,6 +489,7 @@ static inline int bpf_in_hardirq(void)\n \t* powerpc64\n \t s390x\n \t loongarch\n+ \t riscv\n /\n static inline int bpf_in_serving_softirq(void)\n {\n@@ -505,6 +511,7 @@ static inline int bpf_in_serving_softirq(void)\n \t* powerpc64\n \t s390x\n \t loongarch\n+ \t riscv\n */\n static inline int bpf_in_task(void)\n {\n" }
2/1	2026/07/22 21:40	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.", "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 b716c246cf3f4d923aa8da08ded17e5955f2cb24 Author: syz-cluster <triage@syzkaller.com> Date: Wed Jul 22 21:40:21 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h index 67ff7882299ec5..ff37ae5a113dcc 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -425,6 +425,8 @@ static inline int get_preempt_count(void) return bpf_get_lowcore()->preempt_count; #elif defined(bpf_target_loongarch) return bpf_get_current_task_btf()->thread_info.preempt_count; +#elif defined(bpf_target_riscv) + return bpf_get_current_task_btf()->thread_info.preempt_count; #endif return 0; } @@ -436,6 +438,7 @@ static inline int get_preempt_count(void) * * powerpc64 * * s390x * * loongarch + * * riscv / static inline int bpf_in_interrupt(void) { @@ -458,6 +461,7 @@ static inline int bpf_in_interrupt(void) * powerpc64 * * s390x * * loongarch + * * riscv / static inline int bpf_in_nmi(void) { @@ -471,6 +475,7 @@ static inline int bpf_in_nmi(void) * powerpc64 * * s390x * * loongarch + * * riscv / static inline int bpf_in_hardirq(void) { @@ -484,6 +489,7 @@ static inline int bpf_in_hardirq(void) * powerpc64 * * s390x * * loongarch + * * riscv / static inline int bpf_in_serving_softirq(void) { @@ -505,6 +511,7 @@ static inline int bpf_in_serving_softirq(void) * powerpc64 * * s390x * * loongarch + * * riscv */ static inline int bpf_in_task(void) {
3/2	2026/07/22 21:40	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2344 output: 79 thoughts: 222 Thoughts: Assessing the Impact of this BPF Patch Okay, so this patch is touching `tools/testing/selftests/bpf/bpf_experimental.h`. That immediately signals that this is confined to the BPF selftests, which is good. The code adds support for `bpf_target_riscv` within `get_preempt_count` and updates comments related to interrupt context checks. This strongly suggests that it is only making the selftests more complete or enabling testing for another architecture. Since it's a change to that specific header file, it's definitely isolated to the userspace selftests. No kernel code is being altered here, which is the crucial point for my assessment. I don't need to consider any kernel fuzzing implications. I will quickly double check to ensure I am correct about this being a selftest header, and yes, `tools/testing/selftests/bpf/` confirms my initial assessment. Therefore, given that it's a selftest change and doesn't impact any core kernel functionality, it is not worth fuzzing. I can confidently say WorthFuzzing=false.
4/2	2026/07/22 21:40	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/22 21:40

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.",
  "WorthFuzzing": false
}

1/1

2026/07/22 21:40

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit b716c246cf3f4d923aa8da08ded17e5955f2cb24\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 22 21:40:21 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h\nindex 67ff7882299ec5..ff37ae5a113dcc 100644\n--- a/tools/testing/selftests/bpf/bpf_experimental.h\n+++ b/tools/testing/selftests/bpf/bpf_experimental.h\n@@ -425,6 +425,8 @@ static inline int get_preempt_count(void)\n \treturn bpf_get_lowcore()-\u003epreempt_count;\n #elif defined(bpf_target_loongarch)\n \treturn bpf_get_current_task_btf()-\u003ethread_info.preempt_count;\n+#elif defined(bpf_target_riscv)\n+\treturn bpf_get_current_task_btf()-\u003ethread_info.preempt_count;\n #endif\n \treturn 0;\n }\n@@ -436,6 +438,7 @@ static inline int get_preempt_count(void)\n  *\t* powerpc64\n  *\t* s390x\n  *\t* loongarch\n+ *\t* riscv\n  */\n static inline int bpf_in_interrupt(void)\n {\n@@ -458,6 +461,7 @@ static inline int bpf_in_interrupt(void)\n  *\t* powerpc64\n  *\t* s390x\n  *\t* loongarch\n+ *\t* riscv\n  */\n static inline int bpf_in_nmi(void)\n {\n@@ -471,6 +475,7 @@ static inline int bpf_in_nmi(void)\n  *\t* powerpc64\n  *\t* s390x\n  *\t* loongarch\n+ *\t* riscv\n  */\n static inline int bpf_in_hardirq(void)\n {\n@@ -484,6 +489,7 @@ static inline int bpf_in_hardirq(void)\n  *\t* powerpc64\n  *\t* s390x\n  *\t* loongarch\n+ *\t* riscv\n  */\n static inline int bpf_in_serving_softirq(void)\n {\n@@ -505,6 +511,7 @@ static inline int bpf_in_serving_softirq(void)\n  *\t* powerpc64\n  *\t* s390x\n  *\t* loongarch\n+ *\t* riscv\n  */\n static inline int bpf_in_task(void)\n {\n"
}

2/1

2026/07/22 21:40

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.",
  "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 b716c246cf3f4d923aa8da08ded17e5955f2cb24
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 22 21:40:21 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h
index 67ff7882299ec5..ff37ae5a113dcc 100644
--- a/tools/testing/selftests/bpf/bpf_experimental.h
+++ b/tools/testing/selftests/bpf/bpf_experimental.h
@@ -425,6 +425,8 @@ static inline int get_preempt_count(void)
 	return bpf_get_lowcore()->preempt_count;
 #elif defined(bpf_target_loongarch)
 	return bpf_get_current_task_btf()->thread_info.preempt_count;
+#elif defined(bpf_target_riscv)
+	return bpf_get_current_task_btf()->thread_info.preempt_count;
 #endif
 	return 0;
 }
@@ -436,6 +438,7 @@ static inline int get_preempt_count(void)
  *	* powerpc64
  *	* s390x
  *	* loongarch
+ *	* riscv
  */
 static inline int bpf_in_interrupt(void)
 {
@@ -458,6 +461,7 @@ static inline int bpf_in_interrupt(void)
  *	* powerpc64
  *	* s390x
  *	* loongarch
+ *	* riscv
  */
 static inline int bpf_in_nmi(void)
 {
@@ -471,6 +475,7 @@ static inline int bpf_in_nmi(void)
  *	* powerpc64
  *	* s390x
  *	* loongarch
+ *	* riscv
  */
 static inline int bpf_in_hardirq(void)
 {
@@ -484,6 +489,7 @@ static inline int bpf_in_hardirq(void)
  *	* powerpc64
  *	* s390x
  *	* loongarch
+ *	* riscv
  */
 static inline int bpf_in_serving_softirq(void)
 {
@@ -505,6 +511,7 @@ static inline int bpf_in_serving_softirq(void)
  *	* powerpc64
  *	* s390x
  *	* loongarch
+ *	* riscv
  */
 static inline int bpf_in_task(void)
 {

3/2

2026/07/22 21:40

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2344
							output: 79
							thoughts: 222

Thoughts:

**Assessing the Impact of this BPF Patch**

Okay, so this patch is touching `tools/testing/selftests/bpf/bpf_experimental.h`.  That immediately signals that this is confined to the BPF selftests, which is good.  The code adds support for `bpf_target_riscv` within `get_preempt_count` and updates comments related to interrupt context checks. This strongly suggests that it is only making the selftests more complete or enabling testing for another architecture.

Since it's a change to *that* specific header file, it's definitely isolated to the userspace selftests. No kernel code is being altered here, which is the crucial point for my assessment. I don't need to consider any kernel fuzzing implications. I will quickly double check to ensure I am correct about this being a selftest header, and yes, `tools/testing/selftests/bpf/` confirms my initial assessment.

Therefore, given that it's a selftest change and doesn't impact any core kernel functionality, it is not worth fuzzing. I can confidently say WorthFuzzing=false.

4/2

2026/07/22 21:40

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a header file in the BPF selftests directory (tools/testing/selftests/bpf/bpf_experimental.h). It does not change any core kernel logic, drivers, or architectures.",
  "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)