AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mediatek MT7915 Wi-Fi driver to register a thermal zone device. This driver is for specific PCIe hardware that is not emulated in standard virtualized fuzzing environments (like QEMU or GCE), making the modified code unreachable during fuzzing.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 7fcb8606e8b7f4c034f53584cb31606f51fe3b57\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sun Jul 19 02:54:04 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c\nindex 250c2d2479b0c6..6568d7b6bc0a02 100644\n--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c\n+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c\n@@ -177,6 +177,25 @@ static const struct thermal_cooling_device_ops mt7915_thermal_ops = {\n \t.set_cur_state = mt7915_thermal_set_cur_throttle_state,\n };\n \n+static int mt7915_thermal_get_temp(struct thermal_zone_device *tz, int *temp)\n+{\n+\tstruct mt7915_phy *phy = thermal_zone_device_priv(tz);\n+\tint val;\n+\n+\tmutex_lock(\u0026phy-\u003edev-\u003emt76.mutex);\n+\tval = mt7915_mcu_get_temperature(phy);\n+\tmutex_unlock(\u0026phy-\u003edev-\u003emt76.mutex);\n+\tif (val \u003c 0)\n+\t\treturn val;\n+\n+\t*temp = val * 1000;\n+\treturn 0;\n+}\n+\n+static const struct thermal_zone_device_ops mt7915_tz_ops = {\n+\t.get_temp = mt7915_thermal_get_temp,\n+};\n+\n static void mt7915_unregister_thermal(struct mt7915_phy *phy)\n {\n \tstruct wiphy *wiphy = phy-\u003emt76-\u003ehw-\u003ewiphy;\n@@ -213,6 +232,17 @@ static int mt7915_thermal_init(struct mt7915_phy *phy)\n \tphy-\u003ethrottle_temp[MT7915_CRIT_TEMP_IDX] = MT7915_CRIT_TEMP;\n \tphy-\u003ethrottle_temp[MT7915_MAX_TEMP_IDX] = MT7915_MAX_TEMP;\n \n+\tphy-\u003etzone = devm_thermal_of_zone_register(phy-\u003edev-\u003emt76.dev,\n+\t\t\t\t\t\t   phy-\u003emt76-\u003eband_idx, phy,\n+\t\t\t\t\t\t   \u0026mt7915_tz_ops);\n+\tif (IS_ERR(phy-\u003etzone)) {\n+\t\tif (PTR_ERR(phy-\u003etzone) != -ENODEV)\n+\t\t\tdev_warn(phy-\u003edev-\u003emt76.dev,\n+\t\t\t\t \"failed to register thermal zone: %ld\\n\",\n+\t\t\t\t PTR_ERR(phy-\u003etzone));\n+\t\tphy-\u003etzone = NULL;\n+\t}\n+\n \tif (!IS_REACHABLE(CONFIG_HWMON))\n \t\treturn 0;\n \ndiff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h\nindex bf1d915a3ca238..92e0f9f0169c02 100644\n--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h\n+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h\n@@ -205,6 +205,7 @@ struct mt7915_phy {\n \n \tstruct ieee80211_vif *monitor_vif;\n \n+\tstruct thermal_zone_device *tzone;\n \tstruct thermal_cooling_device *cdev;\n \tu8 cdev_state;\n \tu8 throttle_state;\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mediatek MT7915 Wi-Fi driver to register a thermal zone device. This driver is for specific PCIe hardware that is not emulated in standard virtualized fuzzing environments (like QEMU or GCE), making the modified code unreachable during fuzzing.",
  "WorthFuzzing": false
}

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.

For your convenience, here is the diff of the changes:
commit 7fcb8606e8b7f4c034f53584cb31606f51fe3b57
Author: syz-cluster <triage@syzkaller.com>
Date:   Sun Jul 19 02:54:04 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 250c2d2479b0c6..6568d7b6bc0a02 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -177,6 +177,25 @@ static const struct thermal_cooling_device_ops mt7915_thermal_ops = {
 	.set_cur_state = mt7915_thermal_set_cur_throttle_state,
 };
 
+static int mt7915_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+	struct mt7915_phy *phy = thermal_zone_device_priv(tz);
+	int val;
+
+	mutex_lock(&phy->dev->mt76.mutex);
+	val = mt7915_mcu_get_temperature(phy);
+	mutex_unlock(&phy->dev->mt76.mutex);
+	if (val < 0)
+		return val;
+
+	*temp = val * 1000;
+	return 0;
+}
+
+static const struct thermal_zone_device_ops mt7915_tz_ops = {
+	.get_temp = mt7915_thermal_get_temp,
+};
+
 static void mt7915_unregister_thermal(struct mt7915_phy *phy)
 {
 	struct wiphy *wiphy = phy->mt76->hw->wiphy;
@@ -213,6 +232,17 @@ static int mt7915_thermal_init(struct mt7915_phy *phy)
 	phy->throttle_temp[MT7915_CRIT_TEMP_IDX] = MT7915_CRIT_TEMP;
 	phy->throttle_temp[MT7915_MAX_TEMP_IDX] = MT7915_MAX_TEMP;
 
+	phy->tzone = devm_thermal_of_zone_register(phy->dev->mt76.dev,
+						   phy->mt76->band_idx, phy,
+						   &mt7915_tz_ops);
+	if (IS_ERR(phy->tzone)) {
+		if (PTR_ERR(phy->tzone) != -ENODEV)
+			dev_warn(phy->dev->mt76.dev,
+				 "failed to register thermal zone: %ld\n",
+				 PTR_ERR(phy->tzone));
+		phy->tzone = NULL;
+	}
+
 	if (!IS_REACHABLE(CONFIG_HWMON))
 		return 0;
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index bf1d915a3ca238..92e0f9f0169c02 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -205,6 +205,7 @@ struct mt7915_phy {
 
 	struct ieee80211_vif *monitor_vif;
 
+	struct thermal_zone_device *tzone;
 	struct thermal_cooling_device *cdev;
 	u8 cdev_state;
 	u8 throttle_state;

gemini-3.1-pro-preview

null

null

							input: 2626
							output: 91
							thoughts: 611
						

**Thermal Zone Registration in MT7915: Unreachable in Fuzzing**

Okay, so I've got a patch that's adding thermal zone support to the MT7915 Wi-Fi driver, specifically in `drivers/net/wireless/mediatek/mt76/mt7915/init.c` and the corresponding header. It looks like it's registering a thermal zone using `devm_thermal_of_zone_register` and providing `mt7915_thermal_get_temp` for temperature retrieval. My initial thought is, can I even get to this code in a fuzzing environment?

The MT7915 is a Mediatek Wi-Fi 6 PCIe driver, meaning it's tied to specific PCIe hardware.  We're generally not emulating these Mediatek PCIe Wi-Fi devices in environments like QEMU or Google Compute Engine, and `mac80211_hwsim` isn't going to help here; that's for generic Wi-Fi emulation, not a specific hardware driver like this.

I've confirmed that there's no standard emulation for the MT7915 that I'm aware of, so I'm already leaning towards "not worth fuzzing". This is just a thermal zone registration and a temperature getter, so it's a very hardware-specific feature. I don't see any easy way to trigger this code path.

Let's double-check, though, just to be thorough. The driver is enabled via `MT76_CORE` and `MT7915E`, and it's a PCIe driver, as evidenced by `drivers/net/wireless/mediatek/mt76/mt7915/pci.c`, with the `mt7915_pci_driver` structure and `mt7915_pci_probe` function.

Because we can't get that hardware into our fuzzing rig, the `mt7915_pci_probe` function *will never be called*. Consequently, the thermal initialization function (`mt7915_thermal_init`) will never get executed.

So, unfortunately, I'm going with `WorthFuzzing=false`. This patch modifies a driver for hardware we can't reach in our virtualized fuzzing setups. I'll use the `set-results` tool to flag this correctly.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mediatek MT7915 Wi-Fi driver to register a thermal zone device. This driver is for specific PCIe hardware that is not emulated in standard virtualized fuzzing environments (like QEMU or GCE), making the modified code unreachable during fuzzing.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch modifies the Mediatek MT7915 Wi-Fi driver to register a thermal zone device. This driver is for specific PCIe hardware that is not emulated in standard virtualized fuzzing environments (like QEMU or GCE), making the modified code unreachable during fuzzing.",
  "WorthFuzzing": false
}