AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/09 13:05	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel itself.", "WorthFuzzing": false }
1/1	2026/07/09 13:05	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit dcc7c86e88294c66c4a1b86bdc74805e75793104\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Thu Jul 9 13:05:26 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c\nindex a7db6f04f7e145..c9c257784ee3d1 100644\n--- a/tools/testing/selftests/bpf/veristat.c\n+++ b/tools/testing/selftests/bpf/veristat.c\n@@ -1248,6 +1248,29 @@ static void fixup_obj_maps(struct bpf_object obj)\n \n \t\t/ fix up map size, if necessary /\n \t\tswitch (bpf_map__type(map)) {\n+\t\t/\n+\t\t * if the verifier doesn't use max_entries\n+\t\t * then set to 1 to avoid -ENOMEM\n+\t\t /\n+\t\tcase BPF_MAP_TYPE_HASH:\n+\t\tcase BPF_MAP_TYPE_PERCPU_HASH:\n+\t\tcase BPF_MAP_TYPE_LRU_HASH:\n+\t\tcase BPF_MAP_TYPE_LRU_PERCPU_HASH:\n+\t\tcase BPF_MAP_TYPE_SOCKHASH:\n+\t\tcase BPF_MAP_TYPE_DEVMAP_HASH:\n+\t\tcase BPF_MAP_TYPE_QUEUE:\n+\t\tcase BPF_MAP_TYPE_STACK:\n+\t\tcase BPF_MAP_TYPE_BLOOM_FILTER:\n+\t\tcase BPF_MAP_TYPE_STACK_TRACE:\n+\t\t\tbpf_map__set_max_entries(map, 1);\n+\t\t\tbreak;\n+\n+\t\t/ ringbufs must be page-aligned */\n+\t\tcase BPF_MAP_TYPE_RINGBUF:\n+\t\tcase BPF_MAP_TYPE_USER_RINGBUF:\n+\t\t\tbpf_map__set_max_entries(map, sysconf(_SC_PAGESIZE));\n+\t\t\tbreak;\n+\n \t\tcase BPF_MAP_TYPE_SK_STORAGE:\n \t\tcase BPF_MAP_TYPE_TASK_STORAGE:\n \t\tcase BPF_MAP_TYPE_INODE_STORAGE:\n" }
2/1	2026/07/09 13:05	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel 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 dcc7c86e88294c66c4a1b86bdc74805e75793104 Author: syz-cluster <triage@syzkaller.com> Date: Thu Jul 9 13:05:26 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c index a7db6f04f7e145..c9c257784ee3d1 100644 --- a/tools/testing/selftests/bpf/veristat.c +++ b/tools/testing/selftests/bpf/veristat.c @@ -1248,6 +1248,29 @@ static void fixup_obj_maps(struct bpf_object obj) / fix up map size, if necessary / switch (bpf_map__type(map)) { + / + * if the verifier doesn't use max_entries + * then set to 1 to avoid -ENOMEM + / + case BPF_MAP_TYPE_HASH: + case BPF_MAP_TYPE_PERCPU_HASH: + case BPF_MAP_TYPE_LRU_HASH: + case BPF_MAP_TYPE_LRU_PERCPU_HASH: + case BPF_MAP_TYPE_SOCKHASH: + case BPF_MAP_TYPE_DEVMAP_HASH: + case BPF_MAP_TYPE_QUEUE: + case BPF_MAP_TYPE_STACK: + case BPF_MAP_TYPE_BLOOM_FILTER: + case BPF_MAP_TYPE_STACK_TRACE: + bpf_map__set_max_entries(map, 1); + break; + + / ringbufs must be page-aligned */ + case BPF_MAP_TYPE_RINGBUF: + case BPF_MAP_TYPE_USER_RINGBUF: + bpf_map__set_max_entries(map, sysconf(_SC_PAGESIZE)); + break; + case BPF_MAP_TYPE_SK_STORAGE: case BPF_MAP_TYPE_TASK_STORAGE: case BPF_MAP_TYPE_INODE_STORAGE:
3/2	2026/07/09 13:05	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2140 output: 60 thoughts: 63 Thoughts: WorthFuzzing Decision Okay, let's break this down. The proposed change is focused on `tools/testing/selftests/bpf/veristat.c`. This is a selftest, a tool for validating functionality, not actual core kernel code. That's the key distinction. Since this modification doesn't introduce any new functionality or potential vulnerabilities directly into the kernel itself – it's just a test harness – I'm going to set `WorthFuzzing=false`. No fuzzing needed here; this isn't a candidate for it.
4/2	2026/07/09 13:05	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel itself.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel itself.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/09 13:05

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

1/1

2026/07/09 13:05

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit dcc7c86e88294c66c4a1b86bdc74805e75793104\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Thu Jul 9 13:05:26 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c\nindex a7db6f04f7e145..c9c257784ee3d1 100644\n--- a/tools/testing/selftests/bpf/veristat.c\n+++ b/tools/testing/selftests/bpf/veristat.c\n@@ -1248,6 +1248,29 @@ static void fixup_obj_maps(struct bpf_object *obj)\n \n \t\t/* fix up map size, if necessary */\n \t\tswitch (bpf_map__type(map)) {\n+\t\t/*\n+\t\t * if the verifier doesn't use max_entries\n+\t\t * then set to 1 to avoid -ENOMEM\n+\t\t */\n+\t\tcase BPF_MAP_TYPE_HASH:\n+\t\tcase BPF_MAP_TYPE_PERCPU_HASH:\n+\t\tcase BPF_MAP_TYPE_LRU_HASH:\n+\t\tcase BPF_MAP_TYPE_LRU_PERCPU_HASH:\n+\t\tcase BPF_MAP_TYPE_SOCKHASH:\n+\t\tcase BPF_MAP_TYPE_DEVMAP_HASH:\n+\t\tcase BPF_MAP_TYPE_QUEUE:\n+\t\tcase BPF_MAP_TYPE_STACK:\n+\t\tcase BPF_MAP_TYPE_BLOOM_FILTER:\n+\t\tcase BPF_MAP_TYPE_STACK_TRACE:\n+\t\t\tbpf_map__set_max_entries(map, 1);\n+\t\t\tbreak;\n+\n+\t\t/* ringbufs must be page-aligned */\n+\t\tcase BPF_MAP_TYPE_RINGBUF:\n+\t\tcase BPF_MAP_TYPE_USER_RINGBUF:\n+\t\t\tbpf_map__set_max_entries(map, sysconf(_SC_PAGESIZE));\n+\t\t\tbreak;\n+\n \t\tcase BPF_MAP_TYPE_SK_STORAGE:\n \t\tcase BPF_MAP_TYPE_TASK_STORAGE:\n \t\tcase BPF_MAP_TYPE_INODE_STORAGE:\n"
}

2/1

2026/07/09 13:05

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel 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 dcc7c86e88294c66c4a1b86bdc74805e75793104
Author: syz-cluster <triage@syzkaller.com>
Date:   Thu Jul 9 13:05:26 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/bpf/veristat.c b/tools/testing/selftests/bpf/veristat.c
index a7db6f04f7e145..c9c257784ee3d1 100644
--- a/tools/testing/selftests/bpf/veristat.c
+++ b/tools/testing/selftests/bpf/veristat.c
@@ -1248,6 +1248,29 @@ static void fixup_obj_maps(struct bpf_object *obj)
 
 		/* fix up map size, if necessary */
 		switch (bpf_map__type(map)) {
+		/*
+		 * if the verifier doesn't use max_entries
+		 * then set to 1 to avoid -ENOMEM
+		 */
+		case BPF_MAP_TYPE_HASH:
+		case BPF_MAP_TYPE_PERCPU_HASH:
+		case BPF_MAP_TYPE_LRU_HASH:
+		case BPF_MAP_TYPE_LRU_PERCPU_HASH:
+		case BPF_MAP_TYPE_SOCKHASH:
+		case BPF_MAP_TYPE_DEVMAP_HASH:
+		case BPF_MAP_TYPE_QUEUE:
+		case BPF_MAP_TYPE_STACK:
+		case BPF_MAP_TYPE_BLOOM_FILTER:
+		case BPF_MAP_TYPE_STACK_TRACE:
+			bpf_map__set_max_entries(map, 1);
+			break;
+
+		/* ringbufs must be page-aligned */
+		case BPF_MAP_TYPE_RINGBUF:
+		case BPF_MAP_TYPE_USER_RINGBUF:
+			bpf_map__set_max_entries(map, sysconf(_SC_PAGESIZE));
+			break;
+
 		case BPF_MAP_TYPE_SK_STORAGE:
 		case BPF_MAP_TYPE_TASK_STORAGE:
 		case BPF_MAP_TYPE_INODE_STORAGE:

3/2

2026/07/09 13:05

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2140
							output: 60
							thoughts: 63

Thoughts:

**WorthFuzzing Decision**

Okay, let's break this down. The proposed change is focused on `tools/testing/selftests/bpf/veristat.c`. This is a *selftest*, a tool for validating functionality, not actual core kernel code. That's the key distinction. Since this modification doesn't introduce any new functionality or potential vulnerabilities directly into the kernel itself – it's just a test harness – I'm going to set `WorthFuzzing=false`. No fuzzing needed here; this isn't a candidate for it.

4/2

2026/07/09 13:05

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a BPF selftest tool (veristat.c) and does not make any functional changes to the kernel 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)