AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds PCI reset quirks for specific Qualcomm WiFi and modem physical PCIe devices. Since these are physical hardware devices that are not emulated in standard virtualized environments like QEMU or GCE, and there is no software framework to inject arbitrary virtual PCI devices with these specific vendor/device IDs into the kernel, this code is unreachable during fuzzing.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit ecb68488aabcd83be19400759ab859246898b9b7\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jun 26 06:33:23 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c\nindex 431c021d7414d2..0de606366200e1 100644\n--- a/drivers/pci/quirks.c\n+++ b/drivers/pci/quirks.c\n@@ -4240,6 +4240,120 @@ static int reset_hinic_vf_dev(struct pci_dev *pdev, bool probe)\n \treturn 0;\n }\n \n+#define QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET\t0x3008\n+#define QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V\tBIT(0)\n+#define QUALCOMM_WIFI_MHICTRL\t\t\t0x38\n+#define QUALCOMM_WIFI_MHICTRL_RESET_MASK\t0x2\n+\n+/*\n+ * Qualcomm WiFi device-specific reset using SoC global reset via BAR0\n+ * registers.\n+ */\n+static int reset_qualcomm_wifi(struct pci_dev *pdev, bool probe)\n+{\n+\tbool link_recovered = false;\n+\tunsigned long timeout;\n+\tvoid __iomem *bar;\n+\tu32 val;\n+\tu16 cmd;\n+\n+\tif (probe)\n+\t\treturn 0;\n+\n+\tif (pdev-\u003ecurrent_state != PCI_D0)\n+\t\treturn -EINVAL;\n+\n+\tpci_read_config_word(pdev, PCI_COMMAND, \u0026cmd);\n+\tpci_write_config_word(pdev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);\n+\n+\tbar = pci_iomap(pdev, 0, 0);\n+\tif (!bar) {\n+\t\tpci_write_config_word(pdev, PCI_COMMAND, cmd);\n+\t\treturn -ENODEV;\n+\t}\n+\n+\tval = ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\tval |= QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V;\n+\tiowrite32(val, bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\tioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\n+\tmsleep(10);\n+\n+\tval \u0026= ~QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V;\n+\tiowrite32(val, bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\tioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\n+\tmsleep(10);\n+\n+\ttimeout = jiffies + msecs_to_jiffies(5000);\n+\twhile (time_before(jiffies, timeout)) {\n+\t\tval = ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);\n+\t\tif (val != PCI_ERROR_RESPONSE) {\n+\t\t\tlink_recovered = true;\n+\t\t\tbreak;\n+\t\t}\n+\t\tmsleep(20);\n+\t}\n+\n+\tif (!link_recovered) {\n+\t\tpci_err(pdev, \"PCIe link failed to recover after reset\\n\");\n+\t\tgoto out_restore;\n+\t}\n+\n+\t/* After SOC_GLOBAL_RESET, MHISTATUS may still have SYSERR bit set\n+\t * and thus need to set MHICTRL_RESET to clear SYSERR.\n+\t */\n+\tiowrite32(QUALCOMM_WIFI_MHICTRL_RESET_MASK, bar + QUALCOMM_WIFI_MHICTRL);\n+\tioread32(bar + QUALCOMM_WIFI_MHICTRL);\n+\n+\tmsleep(10);\n+\n+out_restore:\n+\tpci_iounmap(pdev, bar);\n+\tpci_write_config_word(pdev, PCI_COMMAND, cmd);\n+\n+\treturn link_recovered ? 0 : -ETIMEDOUT;\n+}\n+\n+#define MHI_SOC_RESET_REQ_OFFSET\t\t0xb0\n+#define MHI_SOC_RESET_REQ\t\t\tBIT(0)\n+\n+/*\n+ * Qualcomm modem device-specific reset using MHI SoC reset via BAR0\n+ * register.\n+ */\n+static int reset_qualcomm_modem(struct pci_dev *pdev, bool probe)\n+{\n+\tvoid __iomem *bar;\n+\tu16 cmd;\n+\n+\tif (probe)\n+\t\treturn 0;\n+\n+\tif (pdev-\u003ecurrent_state != PCI_D0)\n+\t\treturn -EINVAL;\n+\n+\tpci_read_config_word(pdev, PCI_COMMAND, \u0026cmd);\n+\tpci_write_config_word(pdev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);\n+\n+\tbar = pci_iomap(pdev, 0, 0);\n+\tif (!bar) {\n+\t\tpci_write_config_word(pdev, PCI_COMMAND, cmd);\n+\t\treturn -ENODEV;\n+\t}\n+\n+\tiowrite32(MHI_SOC_RESET_REQ, bar + MHI_SOC_RESET_REQ_OFFSET);\n+\tioread32(bar + MHI_SOC_RESET_REQ_OFFSET);\n+\n+\t/* Be sure device reset has been executed */\n+\tmsleep(2000);\n+\n+\tpci_iounmap(pdev, bar);\n+\tpci_write_config_word(pdev, PCI_COMMAND, cmd);\n+\n+\treturn 0;\n+}\n+\n static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {\n \t{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,\n \t\t reset_intel_82599_sfp_virtfn },\n@@ -4255,6 +4369,9 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {\n \t\treset_chelsio_generic_dev },\n \t{ PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HINIC_VF,\n \t\treset_hinic_vf_dev },\n+\t{ PCI_VENDOR_ID_QCOM, 0x0308, reset_qualcomm_modem }, /* SDX62/SDX65 modems */\n+\t{ PCI_VENDOR_ID_QCOM, 0x1103, reset_qualcomm_wifi },  /* WCN6855 WiFi */\n+\t{ PCI_VENDOR_ID_QCOM, 0x1107, reset_qualcomm_wifi },  /* WCN7850 WiFi */\n \t{ 0 }\n };\n \n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds PCI reset quirks for specific Qualcomm WiFi and modem physical PCIe devices. Since these are physical hardware devices that are not emulated in standard virtualized environments like QEMU or GCE, and there is no software framework to inject arbitrary virtual PCI devices with these specific vendor/device IDs into the kernel, this code is 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 ecb68488aabcd83be19400759ab859246898b9b7
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jun 26 06:33:23 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 431c021d7414d2..0de606366200e1 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4240,6 +4240,120 @@ static int reset_hinic_vf_dev(struct pci_dev *pdev, bool probe)
 	return 0;
 }
 
+#define QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET	0x3008
+#define QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V	BIT(0)
+#define QUALCOMM_WIFI_MHICTRL			0x38
+#define QUALCOMM_WIFI_MHICTRL_RESET_MASK	0x2
+
+/*
+ * Qualcomm WiFi device-specific reset using SoC global reset via BAR0
+ * registers.
+ */
+static int reset_qualcomm_wifi(struct pci_dev *pdev, bool probe)
+{
+	bool link_recovered = false;
+	unsigned long timeout;
+	void __iomem *bar;
+	u32 val;
+	u16 cmd;
+
+	if (probe)
+		return 0;
+
+	if (pdev->current_state != PCI_D0)
+		return -EINVAL;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	pci_write_config_word(pdev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);
+
+	bar = pci_iomap(pdev, 0, 0);
+	if (!bar) {
+		pci_write_config_word(pdev, PCI_COMMAND, cmd);
+		return -ENODEV;
+	}
+
+	val = ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+	val |= QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V;
+	iowrite32(val, bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+	ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+
+	msleep(10);
+
+	val &= ~QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET_V;
+	iowrite32(val, bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+	ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+
+	msleep(10);
+
+	timeout = jiffies + msecs_to_jiffies(5000);
+	while (time_before(jiffies, timeout)) {
+		val = ioread32(bar + QUALCOMM_WIFI_PCIE_SOC_GLOBAL_RESET);
+		if (val != PCI_ERROR_RESPONSE) {
+			link_recovered = true;
+			break;
+		}
+		msleep(20);
+	}
+
+	if (!link_recovered) {
+		pci_err(pdev, "PCIe link failed to recover after reset\n");
+		goto out_restore;
+	}
+
+	/* After SOC_GLOBAL_RESET, MHISTATUS may still have SYSERR bit set
+	 * and thus need to set MHICTRL_RESET to clear SYSERR.
+	 */
+	iowrite32(QUALCOMM_WIFI_MHICTRL_RESET_MASK, bar + QUALCOMM_WIFI_MHICTRL);
+	ioread32(bar + QUALCOMM_WIFI_MHICTRL);
+
+	msleep(10);
+
+out_restore:
+	pci_iounmap(pdev, bar);
+	pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+	return link_recovered ? 0 : -ETIMEDOUT;
+}
+
+#define MHI_SOC_RESET_REQ_OFFSET		0xb0
+#define MHI_SOC_RESET_REQ			BIT(0)
+
+/*
+ * Qualcomm modem device-specific reset using MHI SoC reset via BAR0
+ * register.
+ */
+static int reset_qualcomm_modem(struct pci_dev *pdev, bool probe)
+{
+	void __iomem *bar;
+	u16 cmd;
+
+	if (probe)
+		return 0;
+
+	if (pdev->current_state != PCI_D0)
+		return -EINVAL;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	pci_write_config_word(pdev, PCI_COMMAND, cmd | PCI_COMMAND_MEMORY);
+
+	bar = pci_iomap(pdev, 0, 0);
+	if (!bar) {
+		pci_write_config_word(pdev, PCI_COMMAND, cmd);
+		return -ENODEV;
+	}
+
+	iowrite32(MHI_SOC_RESET_REQ, bar + MHI_SOC_RESET_REQ_OFFSET);
+	ioread32(bar + MHI_SOC_RESET_REQ_OFFSET);
+
+	/* Be sure device reset has been executed */
+	msleep(2000);
+
+	pci_iounmap(pdev, bar);
+	pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+	return 0;
+}
+
 static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
 	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82599_SFP_VF,
 		 reset_intel_82599_sfp_virtfn },
@@ -4255,6 +4369,9 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
 		reset_chelsio_generic_dev },
 	{ PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HINIC_VF,
 		reset_hinic_vf_dev },
+	{ PCI_VENDOR_ID_QCOM, 0x0308, reset_qualcomm_modem }, /* SDX62/SDX65 modems */
+	{ PCI_VENDOR_ID_QCOM, 0x1103, reset_qualcomm_wifi },  /* WCN6855 WiFi */
+	{ PCI_VENDOR_ID_QCOM, 0x1107, reset_qualcomm_wifi },  /* WCN7850 WiFi */
 	{ 0 }
 };
 

gemini-3.1-pro-preview

null

null

							input: 3343
							output: 20
							thoughts: 262
						

**Fuzzing the Qualcomm Reset Functions**

Okay, so we have this patch adding `reset_qualcomm_wifi` and `reset_qualcomm_modem` to `drivers/pci/quirks.c`. They're being added to the `pci_dev_reset_methods` array, which immediately flags it as something potentially fuzzable. Device-specific reset methods, PCI quirks... that's definitely a target for exploration.

The question is, can we actually hit this with fuzzing? These quirks are triggered during PCI device initialization or reset, so we need to be sure the fuzzer can induce those states. Syzkaller... ah, right. Syzkaller *does* have a virtual PCI device, `vhci`, so it can trigger the probing and reset routines. Good. We can also emulate PCI devices, `syz_pci_device_add` style, if supported. That should be sufficient.

Now, any configuration caveats?  `CONFIG_PCI` is essential, of course, but that's standard.  Let's double-check the code itself, `drivers/pci/quirks.c`, just to be certain there aren't any other conditional configurations hiding in there.  The file itself is compiled under `CONFIG_PCI`, which is the main enabler, but any dependencies within the file are worth checking. I don't see anything obvious. Alright, let's keep going.

{
  "Expression": "reset_qualcomm_wifi"
}

{
  "Output": "drivers/pci/quirks.c=4188=static int reset_hinic_vf_dev(struct pci_dev *pdev, bool probe)\n--\ndrivers/pci/quirks.c-4251- */\ndrivers/pci/quirks.c:4252:static int reset_qualcomm_wifi(struct pci_dev *pdev, bool probe)\ndrivers/pci/quirks.c-4253-{\n--\ndrivers/pci/quirks.c=4357=static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {\n--\ndrivers/pci/quirks.c-4372-\t{ PCI_VENDOR_ID_QCOM, 0x0308, reset_qualcomm_modem }, /* SDX62/SDX65 modems */\ndrivers/pci/quirks.c:4373:\t{ PCI_VENDOR_ID_QCOM, 0x1103, reset_qualcomm_wifi },  /* WCN6855 WiFi */\ndrivers/pci/quirks.c:4374:\t{ PCI_VENDOR_ID_QCOM, 0x1107, reset_qualcomm_wifi },  /* WCN7850 WiFi */\ndrivers/pci/quirks.c-4375-\t{ 0 }\n"
}

gemini-3.1-pro-preview

null

null

							input: 4279
							output: 22
							thoughts: 68
						

**Analyzing the Device Reset Mechanism**

Okay, so I see these new functions, `reset_qualcomm_wifi` and `reset_qualcomm_modem`, have been integrated into `pci_dev_reset_methods`. Interesting. This is clearly a focused implementation for Qualcomm devices, given the naming convention. And, of course, these are invoked through `pci_dev_specific_reset`. Now, my main question is: how is this `pci_dev_specific_reset` function actually being triggered within the system? I need to understand the call chain and context. I need to trace back where *that* function is called to understand the larger device reset architecture. Let's dig in and figure out the upstream logic.

{
  "Expression": "pci_dev_specific_reset"
}

{
  "Output": "drivers/pci/pci.c=5059=const struct pci_reset_fn_method pci_reset_fn_methods[] = {\ndrivers/pci/pci.c-5060-\t{ },\ndrivers/pci/pci.c:5061:\t{ pci_dev_specific_reset, .name = \"device_specific\" },\ndrivers/pci/pci.c-5062-\t{ pci_dev_acpi_reset, .name = \"acpi\" },\n--\ndrivers/pci/pci.h=1147=extern const struct pci_reset_fn_method pci_reset_fn_methods[];\n--\ndrivers/pci/pci.h-1149-#ifdef CONFIG_PCI_QUIRKS\ndrivers/pci/pci.h:1150:int pci_dev_specific_reset(struct pci_dev *dev, bool probe);\ndrivers/pci/pci.h-1151-#else\ndrivers/pci/pci.h:1152:static inline int pci_dev_specific_reset(struct pci_dev *dev, bool probe)\ndrivers/pci/pci.h-1153-{\n--\ndrivers/pci/quirks.c=4357=static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {\n--\ndrivers/pci/quirks.c-4377-\ndrivers/pci/quirks.c:4378:static int __pci_dev_specific_reset(struct pci_dev *dev, bool probe,\ndrivers/pci/quirks.c-4379-\t\t\t\t    const struct pci_dev_reset_methods *i)\n--\ndrivers/pci/quirks.c-4398- */\ndrivers/pci/quirks.c:4399:int pci_dev_specific_reset(struct pci_dev *dev, bool probe)\ndrivers/pci/quirks.c-4400-{\n--\ndrivers/pci/quirks.c-4407-\t\t     i-\u003edevice == (u16)PCI_ANY_ID))\ndrivers/pci/quirks.c:4408:\t\t\treturn __pci_dev_specific_reset(dev, probe, i);\ndrivers/pci/quirks.c-4409-\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 5125
							output: 20
							thoughts: 36
						

Okay, here's my take on those thoughts, framed from my perspective:

**Investigating PCI Quirks Configuration**

Alright, I'm taking a look at this code and it's clear we're dealing with `CONFIG_PCI_QUIRKS`. The first question that pops into my head is, "Is this enabled by default, or does it depend on some other setting?" I need to quickly establish the default configuration and any dependencies it might have. Understanding the base state will help me determine the implications of its use and how it's being managed within the broader system. Let's see what the configuration options reveal.

{
  "Expression": "config PCI_QUIRKS"
}

{
  "Output": "drivers/pci/Kconfig=59=config PCI_MSI_ARCH_FALLBACKS\n--\ndrivers/pci/Kconfig-61-\ndrivers/pci/Kconfig:62:config PCI_QUIRKS\ndrivers/pci/Kconfig-63-\tdefault y\n"
}

gemini-3.1-pro-preview

null

null

							input: 5396
							output: 102
							thoughts: 981
						

**Unreachable Code in a Virtualized Environment**

Okay, let's break this down. The patch introduces modifications to `drivers/pci/quirks.c`, specifically around PCI reset quirks. The code is enabled by default. My initial thought is to figure out the reachability. This code is triggered if a PCI device with a certain vendor/device ID combination exists. The core question is: can this condition be met in a virtualized environment like QEMU or GCE, which is where syzkaller operates?

Syzkaller can use various interfaces with PCI. My immediate thought goes to the pseudo-syscalls like `syz_pci_device_add`. Does Syzkaller have this? No, it does not. However, Syzkaller *can* interact with PCI devices through sysfs, and QEMU itself *does* expose PCI devices. But, can syzkaller *dynamically* introduce these very specific vendor/device combinations? It needs either hotplug, or something like VFIO, to be able to instantiate devices. Let me double check if syzkaller has this pseudo-syscall: `syz_pci_device_add`. No, it doesn't.

Alright, but wait, can it trigger PCI resets via sysfs? Yes, it can: `/sys/bus/pci/devices/.../reset`. So, if the target device is *present*, this quirk would be triggered. However, the critical question becomes how to make a device with `PCI_VENDOR_ID_QCOM` and `0x0308` (or similar Qualcomm device IDs) present in the VM. Is QEMU emulating them? Can syzkaller somehow inject them? Does Syzkaller have a kernel module for PCI fuzzing, or can it use VFIO or similar? No, I don't think so. I need to be sure. Wait, is there something like `CONFIG_PCI_ENDPOINT_TEST`? No.

If the matching physical hardware isn't present, the code path is simply unreachable. So, I need to understand what devices these IDs represent. Are there software emulations of these Qualcomm devices? No, these are physical Qualcomm WiFi and modem devices. Okay, so if the device is *not* present, `pci_dev_specific_reset` will iterate, find no match, and `reset_qualcomm_wifi` and `reset_qualcomm_modem` won't be called.

Since Syzkaller runs in a VM (QEMU/GCE), it is highly unlikely it has these physical PCIe devices. Is there some software framework to inject PCI devices? There's `PCI_ENDPOINT`, but that makes the VM *act* as an endpoint, not inject a new device into the host. Then there's `umockdev`, but that's userspace. VFIO? But that's for passing through *existing* devices. Therefore, the conclusion is that without the physical hardware, the code is unreachable.

Let's quickly confirm. Those functions are `reset_qualcomm_wifi` and `reset_qualcomm_modem`. They're only called by `pci_dev_specific_reset` if the vendor and device ID match. Vendor ID: `PCI_VENDOR_ID_QCOM` (0x5143, not 0x108e). Device IDs: `0x0308`, `0x1103`, `0x1107`. These are physical devices. No software emulation in the upstream kernel. Syzkaller cannot instantiate them.

Therefore, `WorthFuzzing` should be `false`.

Now, let's review the instructions: "Return WorthFuzzing=false if the patch only contains code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware". This perfectly fits. The patch relies on the presence of physical Qualcomm WiFi/modem PCIe hardware, which is not emulated in these environments. There's no straightforward way to inject virtual devices with these specific IDs into the kernel. The code is unreachable.

Here's how I would write the reasoning: "The patch adds PCI reset quirks for specific Qualcomm WiFi and modem physical PCIe devices. Since these are physical hardware devices that are not emulated in virtualized environments like QEMU or GCE, and there is no software framework to inject arbitrary virtual PCI devices with these specific vendor/device IDs into the kernel, this code is unreachable during fuzzing. Therefore, it is not worth fuzzing."

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch adds PCI reset quirks for specific Qualcomm WiFi and modem physical PCIe devices. Since these are physical hardware devices that are not emulated in standard virtualized environments like QEMU or GCE, and there is no software framework to inject arbitrary virtual PCI devices with these specific vendor/device IDs into the kernel, this code is unreachable during fuzzing.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch adds PCI reset quirks for specific Qualcomm WiFi and modem physical PCIe devices. Since these are physical hardware devices that are not emulated in standard virtualized environments like QEMU or GCE, and there is no software framework to inject arbitrary virtual PCI devices with these specific vendor/device IDs into the kernel, this code is unreachable during fuzzing.",
  "WorthFuzzing": false
}