AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/26 03:16 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree files (dts/dtsi) to add PRUSS IEP, ECAP, and Ethernet nodes. It does not contain any functional C code changes that can be fuzzed.",
  "WorthFuzzing": false
}
1/1 2026/07/26 03:16 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit 585f06c42c54822dfd44e8101776f7919354b182\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sun Jul 26 03:16:44 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi b/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi\nindex f7331662560842..1579f284cb6ef9 100644\n--- a/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi\n+++ b/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi\n@@ -61,6 +61,17 @@ pruss1_iepclk_mux: iepclk-mux@30 {\n \t\t\t\t};\n \t\t\t};\n \n+\t\t\tpruss1_iep: iep@2e000 {\n+\t\t\t\tcompatible = \"ti,am5728-icss-iep\";\n+\t\t\t\treg = \u003c0x2e000 0x31c\u003e;\n+\t\t\t\tclocks = \u003c\u0026pruss1_iepclk_mux\u003e;\n+\t\t\t};\n+\n+\t\t\tpruss1_ecap: ecap@30000 {\n+\t\t\t\tcompatible = \"ti,pruss-ecap\";\n+\t\t\t\treg = \u003c0x30000 0x60\u003e;\n+\t\t\t};\n+\n \t\t\tpruss1_mii_rt: mii-rt@32000 {\n \t\t\t\tcompatible = \"ti,pruss-mii\", \"syscon\";\n \t\t\t\treg = \u003c0x32000 0x58\u003e;\ndiff --git a/arch/arm/boot/dts/ti/omap/am571x-idk.dts b/arch/arm/boot/dts/ti/omap/am571x-idk.dts\nindex 02653b440585d8..e74c154b1940e5 100644\n--- a/arch/arm/boot/dts/ti/omap/am571x-idk.dts\n+++ b/arch/arm/boot/dts/ti/omap/am571x-idk.dts\n@@ -165,6 +165,53 @@ blue3-led {\n \t\t\tdefault-state = \"off\";\n \t\t};\n \t};\n+\n+\t/* Dual mac ethernet application node on icss1 */\n+\tpruss1-eth {\n+\t\tcompatible = \"ti,am57-prueth\";\n+\t\tti,prus = \u003c\u0026pru1_0\u003e, \u003c\u0026pru1_1\u003e;\n+\t\tti,pruss-gp-mux-sel = \u003c0\u003e,\t/* GP, default */\n+\t\t\t\t\u003c4\u003e;\t/* MII2, for PRUSS1_MII1 */\n+\t\tsram = \u003c\u0026ocmcram1\u003e;\n+\t\tti,mii-rt = \u003c\u0026pruss1_mii_rt\u003e;\n+\t\tti,iep = \u003c\u0026pruss1_iep\u003e;\n+\t\tti,ecap = \u003c\u0026pruss1_ecap\u003e;\n+\t\tinterrupts = \u003c20 2 2\u003e, \u003c21 3 3\u003e;\n+\t\tinterrupt-names = \"rx_hp\", \"rx_lp\";\n+\t\tinterrupt-parent = \u003c\u0026pruss1_intc\u003e;\n+\n+\t\tethernet-ports {\n+\t\t\t#address-cells = \u003c1\u003e;\n+\t\t\t#size-cells = \u003c0\u003e;\n+\t\t\tpruss1_emac0: ethernet-port@0 {\n+\t\t\t\treg = \u003c0\u003e;\n+\t\t\t\tphy-handle = \u003c\u0026pruss1_eth0_phy\u003e;\n+\t\t\t\tphy-mode = \"mii\";\n+\t\t\t\tinterrupts = \u003c20 2 2\u003e, \u003c26 6 6\u003e, \u003c23 6 6\u003e;\n+\t\t\t\tinterrupt-names = \"rx\", \"emac_ptp_tx\",\n+\t\t\t\t\t\t\"hsr_ptp_tx\";\n+\t\t\t\t/* Filled in by bootloader */\n+\t\t\t\tlocal-mac-address = [00 00 00 00 00 00];\n+\t\t\t};\n+\n+\t\t\tpruss1_emac1: ethernet-port@1 {\n+\t\t\t\treg = \u003c1\u003e;\n+\t\t\t\tphy-handle = \u003c\u0026pruss1_eth1_phy\u003e;\n+\t\t\t\tphy-mode = \"mii\";\n+\t\t\t\tinterrupts = \u003c21 3 3\u003e, \u003c27 9 7\u003e, \u003c24 9 7\u003e;\n+\t\t\t\tinterrupt-names = \"rx\", \"emac_ptp_tx\",\n+\t\t\t\t\t\t\"hsr_ptp_tx\";\n+\t\t\t\t/* Filled in by bootloader */\n+\t\t\t\tlocal-mac-address = [00 00 00 00 00 00];\n+\t\t\t};\n+\t\t};\n+\t};\n+};\n+\n+\u0026pruss1_iep {\n+\tinterrupt-parent = \u003c\u0026pruss1_intc\u003e;\n+\tinterrupts = \u003c7 7 8\u003e;\n+\tinterrupt-names = \"iep_cap_cmp\";\n };\n \n \u0026extcon_usb2 {\n@@ -210,7 +257,23 @@ \u0026mmc2 {\n };\n \n \u0026pruss1_mdio {\n-\tstatus = \"disabled\";\n+\tstatus = \"okay\";\n+\treset-gpios = \u003c\u0026gpio5 8 GPIO_ACTIVE_LOW\u003e;\n+\treset-delay-us = \u003c2\u003e;   /* PHY datasheet states 1uS min */\n+\t#address-cells = \u003c1\u003e;\n+\t#size-cells = \u003c0\u003e;\n+\n+\tpruss1_eth0_phy: ethernet-phy@0 {\n+\t\treg = \u003c0\u003e;\n+\t\tinterrupt-parent = \u003c\u0026gpio3\u003e;\n+\t\tinterrupts = \u003c28 IRQ_TYPE_LEVEL_LOW\u003e;\n+\t};\n+\n+\tpruss1_eth1_phy: ethernet-phy@1 {\n+\t\treg = \u003c1\u003e;\n+\t\tinterrupt-parent = \u003c\u0026gpio3\u003e;\n+\t\tinterrupts = \u003c29 IRQ_TYPE_LEVEL_LOW\u003e;\n+\t};\n };\n \n \u0026pruss2_mdio {\n"
}
2/1 2026/07/26 03:16 agent patch-evaluator
0m Model: 
best-expensive

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree files (dts/dtsi) to add PRUSS IEP, ECAP, and Ethernet nodes. 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 585f06c42c54822dfd44e8101776f7919354b182
Author: syz-cluster <triage@syzkaller.com>
Date:   Sun Jul 26 03:16:44 2026 +0000

    syz-cluster: applied patch under review

diff --git a/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi b/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi
index f7331662560842..1579f284cb6ef9 100644
--- a/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi
+++ b/arch/arm/boot/dts/ti/omap/am57-pruss.dtsi
@@ -61,6 +61,17 @@ pruss1_iepclk_mux: iepclk-mux@30 {
 				};
 			};
 
+			pruss1_iep: iep@2e000 {
+				compatible = "ti,am5728-icss-iep";
+				reg = <0x2e000 0x31c>;
+				clocks = <&pruss1_iepclk_mux>;
+			};
+
+			pruss1_ecap: ecap@30000 {
+				compatible = "ti,pruss-ecap";
+				reg = <0x30000 0x60>;
+			};
+
 			pruss1_mii_rt: mii-rt@32000 {
 				compatible = "ti,pruss-mii", "syscon";
 				reg = <0x32000 0x58>;
diff --git a/arch/arm/boot/dts/ti/omap/am571x-idk.dts b/arch/arm/boot/dts/ti/omap/am571x-idk.dts
index 02653b440585d8..e74c154b1940e5 100644
--- a/arch/arm/boot/dts/ti/omap/am571x-idk.dts
+++ b/arch/arm/boot/dts/ti/omap/am571x-idk.dts
@@ -165,6 +165,53 @@ blue3-led {
 			default-state = "off";
 		};
 	};
+
+	/* Dual mac ethernet application node on icss1 */
+	pruss1-eth {
+		compatible = "ti,am57-prueth";
+		ti,prus = <&pru1_0>, <&pru1_1>;
+		ti,pruss-gp-mux-sel = <0>,	/* GP, default */
+				<4>;	/* MII2, for PRUSS1_MII1 */
+		sram = <&ocmcram1>;
+		ti,mii-rt = <&pruss1_mii_rt>;
+		ti,iep = <&pruss1_iep>;
+		ti,ecap = <&pruss1_ecap>;
+		interrupts = <20 2 2>, <21 3 3>;
+		interrupt-names = "rx_hp", "rx_lp";
+		interrupt-parent = <&pruss1_intc>;
+
+		ethernet-ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			pruss1_emac0: ethernet-port@0 {
+				reg = <0>;
+				phy-handle = <&pruss1_eth0_phy>;
+				phy-mode = "mii";
+				interrupts = <20 2 2>, <26 6 6>, <23 6 6>;
+				interrupt-names = "rx", "emac_ptp_tx",
+						"hsr_ptp_tx";
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+
+			pruss1_emac1: ethernet-port@1 {
+				reg = <1>;
+				phy-handle = <&pruss1_eth1_phy>;
+				phy-mode = "mii";
+				interrupts = <21 3 3>, <27 9 7>, <24 9 7>;
+				interrupt-names = "rx", "emac_ptp_tx",
+						"hsr_ptp_tx";
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+		};
+	};
+};
+
+&pruss1_iep {
+	interrupt-parent = <&pruss1_intc>;
+	interrupts = <7 7 8>;
+	interrupt-names = "iep_cap_cmp";
 };
 
 &extcon_usb2 {
@@ -210,7 +257,23 @@ &mmc2 {
 };
 
 &pruss1_mdio {
-	status = "disabled";
+	status = "okay";
+	reset-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;
+	reset-delay-us = <2>;   /* PHY datasheet states 1uS min */
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	pruss1_eth0_phy: ethernet-phy@0 {
+		reg = <0>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <28 IRQ_TYPE_LEVEL_LOW>;
+	};
+
+	pruss1_eth1_phy: ethernet-phy@1 {
+		reg = <1>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+	};
 };
 
 &pruss2_mdio {

3/2 2026/07/26 03:16 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 3321
							output: 74
							thoughts: 111

Thoughts: 
**Assessing the Fuzzing Potential of This Patch**

Okay, let's break this down from a fuzzing perspective. The patch's core modification centers around device tree files: `am57-pruss.dtsi` and `am571x-idk.dts`. It looks like it's introducing new nodes related to the PRUSS IEP, the Enhanced Capture (ECAP) module, and the Ethernet ports. So, we're talking about hardware configuration, essentially.

Now, the crucial point: these are *device tree* changes. Device trees, by definition, aren't executable code in the traditional sense that we'd directly throw at syzkaller. They're declarative descriptions of the hardware's layout. While these configurations *influence* the kernel's behavior and therefore could potentially expose new attack surfaces, there's no direct, self-contained C code within the device tree itself that can be fuzzed in a straightforward way. We'd have to find some driver that uses this definition and then target the driver, but the device tree itself is not the source.

Therefore, given that it's just device tree changes without any immediately obvious executable components to fuzz directly, the `WorthFuzzing` flag? It has to be set to `false`. We can't immediately fuzz the device tree description.

4/2 2026/07/26 03:16 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies device tree files (dts/dtsi) to add PRUSS IEP, ECAP, and Ethernet nodes. 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 files (dts/dtsi) to add PRUSS IEP, ECAP, and Ethernet nodes. It does not contain any functional C code changes that can be fuzzed.",
  "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)