AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/18 00:42	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.", "WorthFuzzing": false }
1/1	2026/07/18 00:42	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 16ec8c80893bdc3b83482be4a2226be01f7ff7a7\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Jul 18 00:42:10 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h\nindex 43c854a273c3aa..649f31e34e810e 100644\n--- a/include/linux/percpu-defs.h\n+++ b/include/linux/percpu-defs.h\n@@ -184,6 +184,8 @@\n #define DEFINE_PER_CPU_DECRYPTED(type, name)\t\t\t\t\\\n \tDEFINE_PER_CPU_SECTION(type, name, \"..decrypted\")\n #else\n+#define DECLARE_PER_CPU_DECRYPTED(type, name)\tDECLARE_PER_CPU(type, name)\n+\n #define DEFINE_PER_CPU_DECRYPTED(type, name)\tDEFINE_PER_CPU(type, name)\n #endif\n \n" }
2/1	2026/07/18 00:42	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.", "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 16ec8c80893bdc3b83482be4a2226be01f7ff7a7 Author: syz-cluster <triage@syzkaller.com> Date: Sat Jul 18 00:42:10 2026 +0000 syz-cluster: applied patch under review diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index 43c854a273c3aa..649f31e34e810e 100644 --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -184,6 +184,8 @@ #define DEFINE_PER_CPU_DECRYPTED(type, name) \ DEFINE_PER_CPU_SECTION(type, name, "..decrypted") #else +#define DECLARE_PER_CPU_DECRYPTED(type, name) DECLARE_PER_CPU(type, name) + #define DEFINE_PER_CPU_DECRYPTED(type, name) DEFINE_PER_CPU(type, name) #endif
3/2	2026/07/18 00:42	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 1839 output: 61 thoughts: 375 Thoughts: Analyzing the Patch: A Macro Definition with No Apparent Impact Okay, let's break this down. My initial assessment is that this patch introduces a new macro called `DECLARE_PER_CPU_DECRYPTED(type, name)`. It seems like its behavior depends on whether `CONFIG_AMD_MEM_ENCRYPT` (or a similar condition used for `DEFINE_PER_CPU_DECRYPTED`) is defined. The core of this is the include file `include/linux/percpu-defs.h`. Essentially, if the encryption config is not enabled, the macro is defined as a simple expansion of `DECLARE_PER_CPU(type, name)`. So, at its core, this doesn't actually introduce any novel functionality on its own. It's just a definition. I'm checking if there are changes to other files; it looks like the patch only modifies `include/linux/percpu-defs.h`. The patch's diff confirms my understanding: it's purely an addition of a macro definition. This means there's no alteration of logic, at least not directly. I'm seeing no tangible functional changes at this level. Therefore, given the nature of this patch, I'll flag it as `WorthFuzzing=false`. It's a purely macro definition change.
4/2	2026/07/18 00:42	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/18 00:42

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.",
  "WorthFuzzing": false
}

1/1

2026/07/18 00:42

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 16ec8c80893bdc3b83482be4a2226be01f7ff7a7\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Jul 18 00:42:10 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h\nindex 43c854a273c3aa..649f31e34e810e 100644\n--- a/include/linux/percpu-defs.h\n+++ b/include/linux/percpu-defs.h\n@@ -184,6 +184,8 @@\n #define DEFINE_PER_CPU_DECRYPTED(type, name)\t\t\t\t\\\n \tDEFINE_PER_CPU_SECTION(type, name, \"..decrypted\")\n #else\n+#define DECLARE_PER_CPU_DECRYPTED(type, name)\tDECLARE_PER_CPU(type, name)\n+\n #define DEFINE_PER_CPU_DECRYPTED(type, name)\tDEFINE_PER_CPU(type, name)\n #endif\n \n"
}

2/1

2026/07/18 00:42

agent

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.",
  "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 16ec8c80893bdc3b83482be4a2226be01f7ff7a7
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Jul 18 00:42:10 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 43c854a273c3aa..649f31e34e810e 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -184,6 +184,8 @@
 #define DEFINE_PER_CPU_DECRYPTED(type, name)				\
 	DEFINE_PER_CPU_SECTION(type, name, "..decrypted")
 #else
+#define DECLARE_PER_CPU_DECRYPTED(type, name)	DECLARE_PER_CPU(type, name)
+
 #define DEFINE_PER_CPU_DECRYPTED(type, name)	DEFINE_PER_CPU(type, name)
 #endif

3/2

2026/07/18 00:42

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 1839
							output: 61
							thoughts: 375

Thoughts:

**Analyzing the Patch: A Macro Definition with No Apparent Impact**

Okay, let's break this down. My initial assessment is that this patch introduces a new macro called `DECLARE_PER_CPU_DECRYPTED(type, name)`. It seems like its behavior depends on whether `CONFIG_AMD_MEM_ENCRYPT` (or a similar condition used for `DEFINE_PER_CPU_DECRYPTED`) is defined. The core of this is the include file `include/linux/percpu-defs.h`.

Essentially, if the encryption config is *not* enabled, the macro is defined as a simple expansion of `DECLARE_PER_CPU(type, name)`. So, at its core, this doesn't actually introduce any novel functionality on its own. It's just a definition.

I'm checking if there are changes to other files; it looks like the patch *only* modifies `include/linux/percpu-defs.h`.

The patch's diff confirms my understanding: it's purely an addition of a macro definition. This means there's no alteration of logic, at least not directly. I'm seeing no tangible functional changes at this level.

Therefore, given the nature of this patch, I'll flag it as `WorthFuzzing=false`. It's a purely macro definition change.

4/2

2026/07/18 00:42

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a macro definition (DECLARE_PER_CPU_DECRYPTED) and does not contain any functional changes to the kernel logic.",
  "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)