AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/06/30 17:58	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code.", "WorthFuzzing": false }
1/1	2026/06/30 17:58	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 964c162d66719acd6f98514d568b4483e7fe8117\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Jun 30 17:58:35 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tests/block/044 b/tests/block/044\nnew file mode 100755\nindex 00000000000000..097dd79d3bda80\n--- /dev/null\n+++ b/tests/block/044\n@@ -0,0 +1,62 @@\n+#!/bin/bash\n+# SPDX-License-Identifier: GPL-2.0+\n+# Copyright (c) 2026 Christoph Hellwig.\n+#\n+# Basic block error injection test.\n+\n+. tests/block/rc\n+. common/scsi_debug\n+\n+DESCRIPTION=\"basic block error injection test\"\n+QUICK=1\n+\n+requires()\n+{\n+\t_have_kernel_option BLK_ERROR_INJECTION\n+\t_have_loadable_scsi_debug\n+\t_have_program xfs_io\n+}\n+\n+# load and remove scsi_debug once to test the static_key bug in the\n+# initial commit\n+_test_load_unload()\n+{\n+\tif ! _init_scsi_debug dev_size_mb=500; then\n+\t\treturn 1\n+\tfi\n+\techo \"Testing unload without rules\"\n+\t_exit_scsi_debug\n+}\n+\n+_test_rules()\n+{\n+\tif ! _init_scsi_debug dev_size_mb=500; then\n+\t\treturn 1\n+\tfi\n+\n+\tlocal dev=${SCSI_DEBUG_DEVICES[0]}\n+\tlocal debugfs_file=\"/sys/kernel/debug/block/$dev/error_injection\"\n+\n+\techo \"Testing valid rules\"\n+\techo \"add,op=WRITE,status=RESOURCE,start=0,nr_sectors=8\" \u003e \"$debugfs_file\"\n+\techo \"add,op=READ,status=IOERR,start=16,nr_sectors=8\" \u003e \"$debugfs_file\"\n+\txfs_io -d -c 'pwrite -q 0 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pread -q 0 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pwrite -q 4096 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pread -q 8192 8192' /dev/\"$dev\"\n+\n+\techo \"Testing invalid rules\"\n+\techo \"op=READ,status=IOERR\" \u003e \"$debugfs_file\"\n+\techo \"add,op=READ,status=EIO,start=32\" \u003e \"$debugfs_file\"\n+\t_exit_scsi_debug\n+}\n+\n+test()\n+{\n+\techo \"Running ${TEST_NAME}\"\n+\n+\t_test_load_unload\n+\t_test_rules\n+\n+\techo \"Test complete\"\n+}\ndiff --git a/tests/block/044.out b/tests/block/044.out\nnew file mode 100644\nindex 00000000000000..92efcddf7c8e62\n--- /dev/null\n+++ b/tests/block/044.out\n@@ -0,0 +1,9 @@\n+Running block/044\n+Testing unload without rules\n+Testing valid rules\n+pwrite: Cannot allocate memory\n+pread: Input/output error\n+Testing invalid rules\n+tests/block/044: line 56: echo: write error: Invalid argument\n+tests/block/044: line 57: echo: write error: Invalid argument\n+Test complete\n" }
2/1	2026/06/30 17:58	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel 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 964c162d66719acd6f98514d568b4483e7fe8117 Author: syz-cluster <triage@syzkaller.com> Date: Tue Jun 30 17:58:35 2026 +0000 syz-cluster: applied patch under review diff --git a/tests/block/044 b/tests/block/044 new file mode 100755 index 00000000000000..097dd79d3bda80 --- /dev/null +++ b/tests/block/044 @@ -0,0 +1,62 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0+ +# Copyright (c) 2026 Christoph Hellwig. +# +# Basic block error injection test. + +. tests/block/rc +. common/scsi_debug + +DESCRIPTION="basic block error injection test" +QUICK=1 + +requires() +{ + _have_kernel_option BLK_ERROR_INJECTION + _have_loadable_scsi_debug + _have_program xfs_io +} + +# load and remove scsi_debug once to test the static_key bug in the +# initial commit +_test_load_unload() +{ + if ! _init_scsi_debug dev_size_mb=500; then + return 1 + fi + echo "Testing unload without rules" + _exit_scsi_debug +} + +_test_rules() +{ + if ! _init_scsi_debug dev_size_mb=500; then + return 1 + fi + + local dev=${SCSI_DEBUG_DEVICES[0]} + local debugfs_file="/sys/kernel/debug/block/$dev/error_injection" + + echo "Testing valid rules" + echo "add,op=WRITE,status=RESOURCE,start=0,nr_sectors=8" > "$debugfs_file" + echo "add,op=READ,status=IOERR,start=16,nr_sectors=8" > "$debugfs_file" + xfs_io -d -c 'pwrite -q 0 4096' /dev/"$dev" + xfs_io -d -c 'pread -q 0 4096' /dev/"$dev" + xfs_io -d -c 'pwrite -q 4096 4096' /dev/"$dev" + xfs_io -d -c 'pread -q 8192 8192' /dev/"$dev" + + echo "Testing invalid rules" + echo "op=READ,status=IOERR" > "$debugfs_file" + echo "add,op=READ,status=EIO,start=32" > "$debugfs_file" + _exit_scsi_debug +} + +test() +{ + echo "Running ${TEST_NAME}" + + _test_load_unload + _test_rules + + echo "Test complete" +} diff --git a/tests/block/044.out b/tests/block/044.out new file mode 100644 index 00000000000000..92efcddf7c8e62 --- /dev/null +++ b/tests/block/044.out @@ -0,0 +1,9 @@ +Running block/044 +Testing unload without rules +Testing valid rules +pwrite: Cannot allocate memory +pread: Input/output error +Testing invalid rules +tests/block/044: line 56: echo: write error: Invalid argument +tests/block/044: line 57: echo: write error: Invalid argument +Test complete
3/2	2026/06/30 17:58	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2528 output: 54 thoughts: 184 Thoughts: Analyzing a Test Suite Addition Okay, so I'm looking at this patch and immediately see it's introducing a new test script, `tests/block/044`, and its expected output, `tests/block/044.out`. Based on the path, this is almost certainly part of a blktests suite. No kernel source code is touched here – just test artifacts. My initial assessment is that this patch doesn't introduce any functional changes to the kernel itself. It's strictly about expanding the test coverage. So, "WorthFuzzing" is going to be false. Let's quickly confirm. Yes, the diff confirms it's just those two files. No surprises. I'm confident in my analysis. I'll proceed to call `set-results` with `WorthFuzzing: false`. I'll also add a clear reasoning statement: "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code." That should be sufficient.
4/2	2026/06/30 17:59	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/06/30 17:58

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code.",
  "WorthFuzzing": false
}

1/1

2026/06/30 17:58

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 964c162d66719acd6f98514d568b4483e7fe8117\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Tue Jun 30 17:58:35 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tests/block/044 b/tests/block/044\nnew file mode 100755\nindex 00000000000000..097dd79d3bda80\n--- /dev/null\n+++ b/tests/block/044\n@@ -0,0 +1,62 @@\n+#!/bin/bash\n+# SPDX-License-Identifier: GPL-2.0+\n+# Copyright (c) 2026 Christoph Hellwig.\n+#\n+# Basic block error injection test.\n+\n+. tests/block/rc\n+. common/scsi_debug\n+\n+DESCRIPTION=\"basic block error injection test\"\n+QUICK=1\n+\n+requires()\n+{\n+\t_have_kernel_option BLK_ERROR_INJECTION\n+\t_have_loadable_scsi_debug\n+\t_have_program xfs_io\n+}\n+\n+# load and remove scsi_debug once to test the static_key bug in the\n+# initial commit\n+_test_load_unload()\n+{\n+\tif ! _init_scsi_debug dev_size_mb=500; then\n+\t\treturn 1\n+\tfi\n+\techo \"Testing unload without rules\"\n+\t_exit_scsi_debug\n+}\n+\n+_test_rules()\n+{\n+\tif ! _init_scsi_debug dev_size_mb=500; then\n+\t\treturn 1\n+\tfi\n+\n+\tlocal dev=${SCSI_DEBUG_DEVICES[0]}\n+\tlocal debugfs_file=\"/sys/kernel/debug/block/$dev/error_injection\"\n+\n+\techo \"Testing valid rules\"\n+\techo \"add,op=WRITE,status=RESOURCE,start=0,nr_sectors=8\" \u003e \"$debugfs_file\"\n+\techo \"add,op=READ,status=IOERR,start=16,nr_sectors=8\" \u003e \"$debugfs_file\"\n+\txfs_io -d -c 'pwrite -q 0 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pread -q 0 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pwrite -q 4096 4096' /dev/\"$dev\"\n+\txfs_io -d -c 'pread -q 8192 8192' /dev/\"$dev\"\n+\n+\techo \"Testing invalid rules\"\n+\techo \"op=READ,status=IOERR\" \u003e \"$debugfs_file\"\n+\techo \"add,op=READ,status=EIO,start=32\" \u003e \"$debugfs_file\"\n+\t_exit_scsi_debug\n+}\n+\n+test()\n+{\n+\techo \"Running ${TEST_NAME}\"\n+\n+\t_test_load_unload\n+\t_test_rules\n+\n+\techo \"Test complete\"\n+}\ndiff --git a/tests/block/044.out b/tests/block/044.out\nnew file mode 100644\nindex 00000000000000..92efcddf7c8e62\n--- /dev/null\n+++ b/tests/block/044.out\n@@ -0,0 +1,9 @@\n+Running block/044\n+Testing unload without rules\n+Testing valid rules\n+pwrite: Cannot allocate memory\n+pread: Input/output error\n+Testing invalid rules\n+tests/block/044: line 56: echo: write error: Invalid argument\n+tests/block/044: line 57: echo: write error: Invalid argument\n+Test complete\n"
}

2/1

2026/06/30 17:58

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel 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 964c162d66719acd6f98514d568b4483e7fe8117
Author: syz-cluster <triage@syzkaller.com>
Date:   Tue Jun 30 17:58:35 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tests/block/044 b/tests/block/044
new file mode 100755
index 00000000000000..097dd79d3bda80
--- /dev/null
+++ b/tests/block/044
@@ -0,0 +1,62 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (c) 2026 Christoph Hellwig.
+#
+# Basic block error injection test.
+
+. tests/block/rc
+. common/scsi_debug
+
+DESCRIPTION="basic block error injection test"
+QUICK=1
+
+requires()
+{
+	_have_kernel_option BLK_ERROR_INJECTION
+	_have_loadable_scsi_debug
+	_have_program xfs_io
+}
+
+# load and remove scsi_debug once to test the static_key bug in the
+# initial commit
+_test_load_unload()
+{
+	if ! _init_scsi_debug dev_size_mb=500; then
+		return 1
+	fi
+	echo "Testing unload without rules"
+	_exit_scsi_debug
+}
+
+_test_rules()
+{
+	if ! _init_scsi_debug dev_size_mb=500; then
+		return 1
+	fi
+
+	local dev=${SCSI_DEBUG_DEVICES[0]}
+	local debugfs_file="/sys/kernel/debug/block/$dev/error_injection"
+
+	echo "Testing valid rules"
+	echo "add,op=WRITE,status=RESOURCE,start=0,nr_sectors=8" > "$debugfs_file"
+	echo "add,op=READ,status=IOERR,start=16,nr_sectors=8" > "$debugfs_file"
+	xfs_io -d -c 'pwrite -q 0 4096' /dev/"$dev"
+	xfs_io -d -c 'pread -q 0 4096' /dev/"$dev"
+	xfs_io -d -c 'pwrite -q 4096 4096' /dev/"$dev"
+	xfs_io -d -c 'pread -q 8192 8192' /dev/"$dev"
+
+	echo "Testing invalid rules"
+	echo "op=READ,status=IOERR" > "$debugfs_file"
+	echo "add,op=READ,status=EIO,start=32" > "$debugfs_file"
+	_exit_scsi_debug
+}
+
+test()
+{
+	echo "Running ${TEST_NAME}"
+
+	_test_load_unload
+	_test_rules
+
+	echo "Test complete"
+}
diff --git a/tests/block/044.out b/tests/block/044.out
new file mode 100644
index 00000000000000..92efcddf7c8e62
--- /dev/null
+++ b/tests/block/044.out
@@ -0,0 +1,9 @@
+Running block/044
+Testing unload without rules
+Testing valid rules
+pwrite: Cannot allocate memory
+pread: Input/output error
+Testing invalid rules
+tests/block/044: line 56: echo: write error: Invalid argument
+tests/block/044: line 57: echo: write error: Invalid argument
+Test complete

3/2

2026/06/30 17:58

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2528
							output: 54
							thoughts: 184

Thoughts:

**Analyzing a Test Suite Addition**

Okay, so I'm looking at this patch and immediately see it's introducing a new test script, `tests/block/044`, and its expected output, `tests/block/044.out`. Based on the path, this is almost certainly part of a blktests suite. No kernel source code is touched here – just test artifacts.

My initial assessment is that this patch doesn't introduce any functional changes to the kernel itself. It's strictly about expanding the test coverage. So, "WorthFuzzing" is going to be false.

Let's quickly confirm. Yes, the diff confirms it's just those two files. No surprises.

I'm confident in my analysis. I'll proceed to call `set-results` with `WorthFuzzing: false`. I'll also add a clear reasoning statement: "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code." That should be sufficient.

4/2

2026/06/30 17:59

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel code.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a test script to a test suite (blktests) and does not modify any kernel 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)