AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/08/10 14:52	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "KMSANReasoning": "", "NeedsKMSAN": false, "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.", "WorthFuzzing": false }
1/1	2026/08/10 14:52	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 9c2d70bf001e09c1cdde81f893f7afc3cf6f8868\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Mon Aug 10 14:52:39 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\nindex dd4efbe5a46e8..fb49cd2da2c69 100644\n--- a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\n@@ -137,6 +137,7 @@ \u0026ethernet1 {\n \tpinctrl-names = \"default\", \"sleep\";\n \tphy-handle = \u003c\u0026phy1_eth1\u003e;\n \tphy-mode = \"rgmii-id\";\n+\tphy-supply = \u003c\u0026scmi_v3v3\u003e;\n \tstatus = \"okay\";\n \n \tmdio {\ndiff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\nindex 8daf3dfd51339..e98a773448ee9 100644\n--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\n@@ -144,6 +144,7 @@ \u0026ethernet1 {\n \tpinctrl-names = \"default\", \"sleep\";\n \tphy-handle = \u003c\u0026phy1_eth1\u003e;\n \tphy-mode = \"rgmii-id\";\n+\tphy-supply = \u003c\u0026scmi_v3v3\u003e;\n \tstatus = \"okay\";\n \n \tmdio {\ndiff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\nindex b5db62a0a5504..0c7c29f4b71e5 100644\n--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\n@@ -247,7 +247,7 @@ phy0_eth2: ethernet-phy@1 {\n \t\t\tcompatible = \"ethernet-phy-id001c.c916\";\n \t\t\treg = \u003c1\u003e;\n \t\t\treset-assert-us = \u003c10000\u003e;\n-\t\t\treset-deassert-us = \u003c300\u003e;\n+\t\t\treset-deassert-us = \u003c80000\u003e;\n \t\t\treset-gpios = \u003c\u0026gpiog 6 GPIO_ACTIVE_LOW\u003e;\n \t\t};\n \t};\n" }
2/1	2026/08/10 14:52	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.", "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). - Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU. - Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove) that are executed only during PCI hot-unplug or sysfs driver unbind operations. 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. Prefer non-static, non-inlined API entrypoint functions over internal static helper functions (which are inlined by the compiler and do not have distinct symbol addresses). 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. Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed for Kbuild to compile the code statically into vmlinux. 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 9c2d70bf001e09c1cdde81f893f7afc3cf6f8868 Author: syz-cluster <triage@syzkaller.com> Date: Mon Aug 10 14:52:39 2026 +0000 syz-cluster: applied patch under review diff --git a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts index dd4efbe5a46e8..fb49cd2da2c69 100644 --- a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts +++ b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts @@ -137,6 +137,7 @@ &ethernet1 { pinctrl-names = "default", "sleep"; phy-handle = <&phy1_eth1>; phy-mode = "rgmii-id"; + phy-supply = <&scmi_v3v3>; status = "okay"; mdio { diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts index 8daf3dfd51339..e98a773448ee9 100644 --- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts +++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts @@ -144,6 +144,7 @@ &ethernet1 { pinctrl-names = "default", "sleep"; phy-handle = <&phy1_eth1>; phy-mode = "rgmii-id"; + phy-supply = <&scmi_v3v3>; status = "okay"; mdio { diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts index b5db62a0a5504..0c7c29f4b71e5 100644 --- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts +++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts @@ -247,7 +247,7 @@ phy0_eth2: ethernet-phy@1 { compatible = "ethernet-phy-id001c.c916"; reg = <1>; reset-assert-us = <10000>; - reset-deassert-us = <300>; + reset-deassert-us = <80000>; reset-gpios = <&gpiog 6 GPIO_ACTIVE_LOW>; }; };
3/2	2026/08/10 14:52	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2567 output: 68 thoughts: 221 Thoughts: Device Tree Tweaks, Not Worthy of Fuzzing Okay, so I've got this patch in front of me. It's making changes to the device tree files for STM32MP2 boards, specifically `stm32mp235f-dk.dts`, `stm32mp257f-dk.dts`, and `stm32mp257f-ev1.dts`. Looks like they're adding `phy-supply = <&scmi_v3v3>;` to `ethernet1` in the first two and tweaking the `reset-deassert-us` value in the EV1 board's DTS. Essentially, we're talking about Device Tree source updates. These are purely hardware-specific configurations. Nothing here involves any C code modifications, which, as we know, is the usual target of fuzzing campaigns for memory corruption vulnerabilities, for example. And since this is DTS manipulation, it seems unlikely to affect standard QEMU emulation (or at least, the changes are only affecting DT). I really don't see any value in fuzzing these changes. Just to be absolutely sure, I'll take a quick look again, focusing on any C code that might have been modified in the commit. Nope, no C code modifications – only those `.dts` files. So, given that it's all Device Tree, all hardware specific, and no code changes, I'm confident in returning `WorthFuzzing=false`.
4/2	2026/08/10 14:52	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.", "WorthFuzzing": false }
5/1	2026/08/10 14:52	action	If	0m Args: { "WorthFuzzing": false } Results: null

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/08/10 14:52

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.",
  "WorthFuzzing": false
}

1/1

2026/08/10 14:52

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 9c2d70bf001e09c1cdde81f893f7afc3cf6f8868\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Aug 10 14:52:39 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\nindex dd4efbe5a46e8..fb49cd2da2c69 100644\n--- a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts\n@@ -137,6 +137,7 @@ \u0026ethernet1 {\n \tpinctrl-names = \"default\", \"sleep\";\n \tphy-handle = \u003c\u0026phy1_eth1\u003e;\n \tphy-mode = \"rgmii-id\";\n+\tphy-supply = \u003c\u0026scmi_v3v3\u003e;\n \tstatus = \"okay\";\n \n \tmdio {\ndiff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\nindex 8daf3dfd51339..e98a773448ee9 100644\n--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts\n@@ -144,6 +144,7 @@ \u0026ethernet1 {\n \tpinctrl-names = \"default\", \"sleep\";\n \tphy-handle = \u003c\u0026phy1_eth1\u003e;\n \tphy-mode = \"rgmii-id\";\n+\tphy-supply = \u003c\u0026scmi_v3v3\u003e;\n \tstatus = \"okay\";\n \n \tmdio {\ndiff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\nindex b5db62a0a5504..0c7c29f4b71e5 100644\n--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\n+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts\n@@ -247,7 +247,7 @@ phy0_eth2: ethernet-phy@1 {\n \t\t\tcompatible = \"ethernet-phy-id001c.c916\";\n \t\t\treg = \u003c1\u003e;\n \t\t\treset-assert-us = \u003c10000\u003e;\n-\t\t\treset-deassert-us = \u003c300\u003e;\n+\t\t\treset-deassert-us = \u003c80000\u003e;\n \t\t\treset-gpios = \u003c\u0026gpiog 6 GPIO_ACTIVE_LOW\u003e;\n \t\t};\n \t};\n"
}

2/1

2026/08/10 14:52

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.",
  "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).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

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.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
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.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. 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 9c2d70bf001e09c1cdde81f893f7afc3cf6f8868
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Aug 10 14:52:39 2026 +0000

    syz-cluster: applied patch under review

diff --git a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts
index dd4efbe5a46e8..fb49cd2da2c69 100644
--- a/arch/arm64/boot/dts/st/stm32mp235f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp235f-dk.dts
@@ -137,6 +137,7 @@ &ethernet1 {
 	pinctrl-names = "default", "sleep";
 	phy-handle = <&phy1_eth1>;
 	phy-mode = "rgmii-id";
+	phy-supply = <&scmi_v3v3>;
 	status = "okay";
 
 	mdio {
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
index 8daf3dfd51339..e98a773448ee9 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-dk.dts
@@ -144,6 +144,7 @@ &ethernet1 {
 	pinctrl-names = "default", "sleep";
 	phy-handle = <&phy1_eth1>;
 	phy-mode = "rgmii-id";
+	phy-supply = <&scmi_v3v3>;
 	status = "okay";
 
 	mdio {
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
index b5db62a0a5504..0c7c29f4b71e5 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -247,7 +247,7 @@ phy0_eth2: ethernet-phy@1 {
 			compatible = "ethernet-phy-id001c.c916";
 			reg = <1>;
 			reset-assert-us = <10000>;
-			reset-deassert-us = <300>;
+			reset-deassert-us = <80000>;
 			reset-gpios = <&gpiog 6 GPIO_ACTIVE_LOW>;
 		};
 	};

3/2

2026/08/10 14:52

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 2567
							output: 68
							thoughts: 221

Thoughts:

**Device Tree Tweaks, Not Worthy of Fuzzing**

Okay, so I've got this patch in front of me. It's making changes to the device tree files for STM32MP2 boards, specifically `stm32mp235f-dk.dts`, `stm32mp257f-dk.dts`, and `stm32mp257f-ev1.dts`. Looks like they're adding `phy-supply = <&scmi_v3v3>;` to `ethernet1` in the first two and tweaking the `reset-deassert-us` value in the EV1 board's DTS.

Essentially, we're talking about Device Tree source updates. These are purely hardware-specific configurations. Nothing here involves any C code modifications, which, as we know, is the usual target of fuzzing campaigns for memory corruption vulnerabilities, for example. And since this is DTS manipulation, it seems unlikely to affect standard QEMU emulation (or at least, the changes are only affecting DT). I really don't see any value in fuzzing these changes.

Just to be absolutely sure, I'll take a quick look again, focusing on any C code that might have been modified in the commit.

Nope, no C code modifications – only those `.dts` files.

So, given that it's all Device Tree, all hardware specific, and no code changes, I'm confident in returning `WorthFuzzing=false`.

4/2

2026/08/10 14:52

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree (.dts) files for specific STM32MP2 hardware boards. It does not contain any functional C code changes that can be fuzzed.",
  "WorthFuzzing": false
}

5/1

2026/08/10 14:52

action

Args:

{
  "WorthFuzzing": false
}

Results:

null

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)