AI Trajectory

null

{
  "EnableConfigs": [
    "IWLWIFI",
    "EFI",
    "IWLMVM",
    "IWLMLD"
  ],
  "FocusSymbols": [
    "iwl_uefi_reduce_power_parse",
    "iwl_pnvm_load_reduce_power_to_trans",
    "iwl_uefi_get_reduced_power"
  ],
  "Reasoning": "The patch fixes an out-of-bounds read when parsing UEFI variables for reduced power settings in the iwlwifi driver. The code is reachable during driver initialization when specific UEFI variables are present.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit 3f717d2958c22b603dd3852a524d79c6a2835677\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 15 20:08:40 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c\nindex 2ef0a7a920adb5..4cd36b42262c37 100644\n--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c\n+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c\n@@ -248,6 +248,12 @@ int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\n \t\t\tIWL_DEBUG_FW(trans,\n \t\t\t\t     \"Got IWL_UCODE_TLV_PNVM_SKU len %d\\n\",\n \t\t\t\t     tlv_len);\n+\t\t\tif (tlv_len \u003c sizeof(*tlv_sku_id)) {\n+\t\t\t\tIWL_ERR(trans, \"invalid PNVM SKU TLV len: %u\\n\",\n+\t\t\t\t\ttlv_len);\n+\t\t\t\treturn -EINVAL;\n+\t\t\t}\n+\n \t\t\tIWL_DEBUG_FW(trans, \"sku_id 0x%0x 0x%0x 0x%0x\\n\",\n \t\t\t\t     le32_to_cpu(tlv_sku_id-\u003edata[0]),\n \t\t\t\t     le32_to_cpu(tlv_sku_id-\u003edata[1]),\n"
}

gemini-3.1-pro-preview

null

{
  "EnableConfigs": [
    "IWLWIFI",
    "EFI",
    "IWLMVM",
    "IWLMLD"
  ],
  "FocusSymbols": [
    "iwl_uefi_reduce_power_parse",
    "iwl_pnvm_load_reduce_power_to_trans",
    "iwl_uefi_get_reduced_power"
  ],
  "Reasoning": "The patch fixes an out-of-bounds read when parsing UEFI variables for reduced power settings in the iwlwifi driver. The code is reachable during driver initialization when specific UEFI variables are present.",
  "WorthFuzzing": true
}

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 3f717d2958c22b603dd3852a524d79c6a2835677
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 15 20:08:40 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index 2ef0a7a920adb5..4cd36b42262c37 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -248,6 +248,12 @@ int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,
 			IWL_DEBUG_FW(trans,
 				     "Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
 				     tlv_len);
+			if (tlv_len < sizeof(*tlv_sku_id)) {
+				IWL_ERR(trans, "invalid PNVM SKU TLV len: %u\n",
+					tlv_len);
+				return -EINVAL;
+			}
+
 			IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
 				     le32_to_cpu(tlv_sku_id->data[0]),
 				     le32_to_cpu(tlv_sku_id->data[1]),

gemini-3.1-pro-preview

null

null

							input: 1982
							output: 49
							thoughts: 121
						

**Analyzing a Firmware Patch**

Okay, so I'm looking at a patch here that's touching `drivers/net/wireless/intel/iwlwifi/fw/uefi.c`. Specifically, it appears to be adding a crucial bounds check within the `iwl_uefi_reduce_power_parse` function. The intent is clear: to prevent a potential buffer overflow by verifying the validity of the received data.

It's adding a comparison: `tlv_len` needs to be greater than or equal to `sizeof(*tlv_sku_id)`. If `tlv_len` is smaller than expected, the function now correctly returns `-EINVAL`. This is a classic defensive programming technique, and a sensible addition to safeguard against malformed data during firmware processing. I'll need to dig into the surrounding code in `iwl_uefi_reduce_power_parse` to fully understand the context, but this patch looks like a good step toward enhanced robustness. I'll take a closer look at the data structure involved too.

{
  "Expression": "iwl_uefi_reduce_power_parse",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c=166=static int iwl_uefi_reduce_power_section(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-219-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:220:int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-221-\t\t\t\tconst u8 *data, size_t len,\n"
}

gemini-3.1-pro-preview

null

null

							input: 2540
							output: 47
							thoughts: 23
						

Okay, let's dive into this. Here's my understanding, thinking through `iwl_uefi_reduce_power_parse`:

**Analyzing iwl_uefi_reduce_power_parse**

Alright, I need to get a handle on what this `iwl_uefi_reduce_power_parse` function is actually doing. My immediate thought is to read through the code to understand its purpose. I'll need to pinpoint its function and how it contributes to power management within the UEFI environment, specifically concerning Intel wireless devices. Does it parse configuration data? Does it interact with the firmware in any way? Does it deal with device-specific registers? I'm going to look for key data structures, function calls to other parts of the driver, and potential interactions with the UEFI system. I'll be watching for any evidence of:

*   **Configuration Parsing**: Is it reading a setup table? A specific EFI variable?
*   **Power State Transitions**: Does this function directly set power management related registers, or make function calls that will?
*   **Error Handling**: How does it manage failure conditions? Are there specific error codes? Are there any return values indicating success or failure?
*   **Interaction with Hardware**: Is it probing hardware capabilities or only dealing with a specific power state request?
*   **Security Concerns**: Does this function interact with any sensitive data or configurations?

I'll be specifically looking to see if there are optimizations or power-saving adjustments. It is important to know which power settings, and their resulting effect on the device, are being configured. I need to understand this function's role in the bigger picture of power management for Intel wireless devices within the UEFI environment. I'll be keeping an eye out for anything non-obvious, perhaps something that isn't immediately apparent.

{
  "File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
  "FirstLine": 220,
  "LineCount": 100
}

{
  "Contents": " 220:\tint iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\n 221:\t\t\t\t\tconst u8 *data, size_t len,\n 222:\t\t\t\t\tstruct iwl_pnvm_image *pnvm_data,\n 223:\t\t\t\t\t__le32 sku_id[3])\n 224:\t{\n 225:\t\tconst struct iwl_ucode_tlv *tlv;\n 226:\t\n 227:\t\tIWL_DEBUG_FW(trans, \"Parsing REDUCE_POWER data\\n\");\n 228:\t\n 229:\t\twhile (len \u003e= sizeof(*tlv)) {\n 230:\t\t\tu32 tlv_len, tlv_type;\n 231:\t\n 232:\t\t\tlen -= sizeof(*tlv);\n 233:\t\t\ttlv = (const void *)data;\n 234:\t\n 235:\t\t\ttlv_len = le32_to_cpu(tlv-\u003elength);\n 236:\t\t\ttlv_type = le32_to_cpu(tlv-\u003etype);\n 237:\t\n 238:\t\t\tif (len \u003c tlv_len) {\n 239:\t\t\t\tIWL_ERR(trans, \"invalid TLV len: %zd/%u\\n\",\n 240:\t\t\t\t\tlen, tlv_len);\n 241:\t\t\t\treturn -EINVAL;\n 242:\t\t\t}\n 243:\t\n 244:\t\t\tif (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {\n 245:\t\t\t\tconst struct iwl_sku_id *tlv_sku_id =\n 246:\t\t\t\t\t(const void *)(data + sizeof(*tlv));\n 247:\t\n 248:\t\t\t\tIWL_DEBUG_FW(trans,\n 249:\t\t\t\t\t     \"Got IWL_UCODE_TLV_PNVM_SKU len %d\\n\",\n 250:\t\t\t\t\t     tlv_len);\n 251:\t\t\t\tif (tlv_len \u003c sizeof(*tlv_sku_id)) {\n 252:\t\t\t\t\tIWL_ERR(trans, \"invalid PNVM SKU TLV len: %u\\n\",\n 253:\t\t\t\t\t\ttlv_len);\n 254:\t\t\t\t\treturn -EINVAL;\n 255:\t\t\t\t}\n 256:\t\n 257:\t\t\t\tIWL_DEBUG_FW(trans, \"sku_id 0x%0x 0x%0x 0x%0x\\n\",\n 258:\t\t\t\t\t     le32_to_cpu(tlv_sku_id-\u003edata[0]),\n 259:\t\t\t\t\t     le32_to_cpu(tlv_sku_id-\u003edata[1]),\n 260:\t\t\t\t\t     le32_to_cpu(tlv_sku_id-\u003edata[2]));\n 261:\t\n 262:\t\t\t\tdata += sizeof(*tlv) + ALIGN(tlv_len, 4);\n 263:\t\t\t\tlen -= ALIGN(tlv_len, 4);\n 264:\t\n 265:\t\t\t\tif (sku_id[0] == tlv_sku_id-\u003edata[0] \u0026\u0026\n 266:\t\t\t\t    sku_id[1] == tlv_sku_id-\u003edata[1] \u0026\u0026\n 267:\t\t\t\t    sku_id[2] == tlv_sku_id-\u003edata[2]) {\n 268:\t\t\t\t\tint ret = iwl_uefi_reduce_power_section(trans,\n 269:\t\t\t\t\t\t\t\t\t    data, len,\n 270:\t\t\t\t\t\t\t\t\t    pnvm_data);\n 271:\t\t\t\t\tif (!ret)\n 272:\t\t\t\t\t\treturn 0;\n 273:\t\t\t\t} else {\n 274:\t\t\t\t\tIWL_DEBUG_FW(trans, \"SKU ID didn't match!\\n\");\n 275:\t\t\t\t}\n 276:\t\t\t} else {\n 277:\t\t\t\tdata += sizeof(*tlv) + ALIGN(tlv_len, 4);\n 278:\t\t\t\tlen -= ALIGN(tlv_len, 4);\n 279:\t\t\t}\n 280:\t\t}\n 281:\t\n 282:\t\treturn -ENOENT;\n 283:\t}\n 284:\t\n 285:\tu8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\n 286:\t{\n 287:\t\tstruct pnvm_sku_package *package;\n 288:\t\tunsigned long package_size;\n 289:\t\tu8 *data;\n 290:\t\n 291:\t\tpackage = iwl_uefi_get_verified_variable(trans,\n 292:\t\t\t\t\t\t\t IWL_UEFI_REDUCED_POWER_NAME,\n 293:\t\t\t\t\t\t\t \"Reduced Power\",\n 294:\t\t\t\t\t\t\t sizeof(*package),\n 295:\t\t\t\t\t\t\t \u0026package_size);\n 296:\t\tif (IS_ERR(package))\n 297:\t\t\treturn ERR_CAST(package);\n 298:\t\n 299:\t\tIWL_DEBUG_FW(trans, \"rev %d, total_size %d, n_skus %d\\n\",\n 300:\t\t\t     package-\u003erev, package-\u003etotal_size, package-\u003en_skus);\n 301:\t\n 302:\t\t*len = package_size - sizeof(*package);\n 303:\t\tdata = kmemdup(package-\u003edata, *len, GFP_KERNEL);\n 304:\t\tif (!data) {\n 305:\t\t\tkfree(package);\n 306:\t\t\treturn ERR_PTR(-ENOMEM);\n 307:\t\t}\n 308:\t\n 309:\t\tkfree(package);\n 310:\t\n 311:\t\treturn data;\n 312:\t}\n 313:\t\n 314:\tstatic int iwl_uefi_step_parse(struct uefi_cnv_common_step_data *common_step_data,\n 315:\t\t\t\t       struct iwl_trans *trans)\n 316:\t{\n 317:\t\tif (common_step_data-\u003erevision != 1)\n 318:\t\t\treturn -EINVAL;\n 319:\t\n"
}

gemini-3.1-pro-preview

null

null

							input: 4610
							output: 43
							thoughts: 40
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Analyzing the iwl_uefi_reduce_power_parse Function**

Right, so I'm looking at `iwl_uefi_reduce_power_parse`. The name itself suggests it's handling the parsing of UEFI variables, specifically in relation to power reduction, presumably for an Intel wireless device. Let's dig deeper. I need to understand the control flow, so the natural next step is to trace the call graph. I'll need to identify precisely *where* this function, `iwl_uefi_reduce_power_parse`, is being invoked within the driver. Determining the call sites is key to understanding the context within which power management decisions are made and how these UEFI variables are ultimately utilized. I want to see how the parsed data is used to optimize the power consumption.

{
  "Expression": "iwl_uefi_reduce_power_parse",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/pnvm.c=407=iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-431-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:432:\tret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-433-\t\t\t\t\t  sku_id);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=166=static int iwl_uefi_reduce_power_section(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-219-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:220:int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-221-\t\t\t\tconst u8 *data, size_t len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h=325=u8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:326:int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-327-\t\t\t\tconst u8 *data, size_t len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h=360=static inline int\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:361:iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-362-\t\t\t    const u8 *data, size_t len,\n"
}

gemini-3.1-pro-preview

null

null

							input: 5446
							output: 47
							thoughts: 69
						

Okay, here's my take on those thoughts, framed as my own mental process:

**Tracing Down the Call Chain**

Alright, so I've got this function, `iwl_pnvm_load_reduce_power_to_trans`, and it looks like it's buried deep within the Intel wireless driver, specifically in `drivers/net/wireless/intel/iwlwifi/fw/pnvm.c`. My immediate thought is, "Where the heck is this called from?" I need to understand the context of this function. Let's see where the call to `iwl_pnvm_load_reduce_power_to_trans` originates. Time to start digging through the call graph to figure out its purpose.

{
  "Expression": "iwl_pnvm_load_reduce_power_to_trans",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/pnvm.c=406=static void\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:407:iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-408-\t\t\t\t    const struct iwl_ucode_capabilities *capa,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c=455=int iwl_pnvm_load(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-467-\tiwl_pnvm_load_pnvm_to_trans(trans, fw, sku_id);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:468:\tiwl_pnvm_load_reduce_power_to_trans(trans, \u0026fw-\u003eucode_capa, sku_id);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-469-\n"
}

gemini-3.1-pro-preview

null

null

							input: 6017
							output: 39
							thoughts: 49
						

Here's my take on the situation:

**Investigating the Intel Wireless Firmware Loading Process**

Okay, so I'm looking at how the Intel wireless firmware gets loaded. Specifically, I'm focusing on `iwl_pnvm_load`. I know this function is invoked from `iwl_mvm_load_ucode_wait_alive` and related functions, but I need to pinpoint every call site. I'm going to dig into the code and determine every instance where `iwl_pnvm_load` is actually called. Gotta understand the entire chain of events to have a good picture of what's happening.

{
  "Expression": "iwl_pnvm_load",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/pnvm.c=359=static void\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:360:iwl_pnvm_load_pnvm_to_trans(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-361-\t\t\t    const struct iwl_fw *fw,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c=406=static void\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:407:iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-408-\t\t\t\t    const struct iwl_ucode_capabilities *capa,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-454-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:455:int iwl_pnvm_load(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-456-\t\t  struct iwl_notif_wait_data *notif_wait,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-466-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:467:\tiwl_pnvm_load_pnvm_to_trans(trans, fw, sku_id);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:468:\tiwl_pnvm_load_reduce_power_to_trans(trans, \u0026fw-\u003eucode_capa, sku_id);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-469-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-480-}\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:481:IWL_EXPORT_SYMBOL(iwl_pnvm_load);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.h-15-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.h:16:int iwl_pnvm_load(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.h-17-\t\t  struct iwl_notif_wait_data *notif_wait,\n--\ndrivers/net/wireless/intel/iwlwifi/mld/fw.c=272=static int iwl_mld_run_fw_init_sequence(struct iwl_mld *mld)\n--\ndrivers/net/wireless/intel/iwlwifi/mld/fw.c-289-\ndrivers/net/wireless/intel/iwlwifi/mld/fw.c:290:\tret = iwl_pnvm_load(mld-\u003etrans, \u0026mld-\u003enotif_wait,\ndrivers/net/wireless/intel/iwlwifi/mld/fw.c-291-\t\t\t    mld-\u003efw, alive_data.sku_id);\n--\ndrivers/net/wireless/intel/iwlwifi/mvm/fw.c=286=static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,\n--\ndrivers/net/wireless/intel/iwlwifi/mvm/fw.c-406-\ndrivers/net/wireless/intel/iwlwifi/mvm/fw.c:407:\tret = iwl_pnvm_load(mvm-\u003etrans, \u0026mvm-\u003enotif_wait,\ndrivers/net/wireless/intel/iwlwifi/mvm/fw.c-408-\t\t\t    mvm-\u003efw, alive_data.sku_id);\n"
}

gemini-3.1-pro-preview

null

null

							input: 7242
							output: 43
							thoughts: 187
						

**Analyzing the iwlwifi Firmware Loading**

Okay, so I'm digging into the iwlwifi firmware loading sequence, specifically how the reduced power PNVM data is handled. My primary interest is in understanding the data source. First, I see this is part of the overall firmware loading, naturally. But, where is the data actually coming from?

I find `iwl_pnvm_load_reduce_power_to_trans`, and that's the key. Inside, the code tries `iwl_uefi_get_reduced_power(trans, &length)`. Interesting. If that fails, it falls back to `iwl_pnvm_get_from_fs(trans, &data, &length)`. Aha! Now it's clear: `iwl_uefi_get_reduced_power` is reading from UEFI variables, I'm sure of it. And `iwl_pnvm_get_from_fs` is the fallback, which, naturally, uses firmware files like `iwlwifi-*.pnvm`.

Wait a minute, if it's UEFI, it must be using something like `efivar_entry_get` or a similar function to access the variable. I need to be sure; let me look at `iwl_uefi_get_verified_variable` to verify the low-level variable access. This is important for understanding the security implications of this process, how updates are handled, and potential vulnerabilities.

{
  "Expression": "iwl_uefi_get_verified_variable",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c=82=static void *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:83:iwl_uefi_get_verified_variable_guid(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-84-\t\t\t\t    efi_guid_t *guid,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=118=static void *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:119:iwl_uefi_get_verified_variable(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-120-\t\t\t       efi_char16_t *uefi_var_name,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-124-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:125:\treturn iwl_uefi_get_verified_variable_guid(trans, \u0026IWL_EFI_WIFI_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-126-\t\t\t\t\t\t   uefi_var_name, var_name,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=285=u8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-290-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:291:\tpackage = iwl_uefi_get_verified_variable(trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-292-\t\t\t\t\t\t IWL_UEFI_REDUCED_POWER_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=329=void iwl_uefi_get_step_table(struct iwl_trans *trans)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-336-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:337:\tdata = iwl_uefi_get_verified_variable_guid(trans, \u0026IWL_EFI_WIFI_BT_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-338-\t\t\t\t\t\t   IWL_UEFI_STEP_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=383=void iwl_uefi_get_sgom_table(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-391-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:392:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_SGOM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-393-\t\t\t\t\t      \"SGOM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=420=void iwl_uefi_get_uats_table(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-425-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:426:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_UATS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-427-\t\t\t\t\t      \"UATS\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=438=void iwl_uefi_get_uneb_table(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-442-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:443:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_UNEB_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-444-\t\t\t\t\t      \"UNEB\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=497=int iwl_uefi_get_wrds_table(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-504-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:505:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WRDS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-506-\t\t\t\t\t      \"WRDS\",\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=545=int iwl_uefi_get_ewrd_table(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-553-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:554:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_EWRD_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-555-\t\t\t\t\t      \"EWRD\",\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=599=int iwl_uefi_get_wgds_table(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-607-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:608:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WGDS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-609-\t\t\t\t\t      \"WGDS\", UEFI_WGDS_TABLE_SIZE_REV3,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=676=int iwl_uefi_get_ppag_table(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-682-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:683:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_PPAG_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-684-\t\t\t\t\t      \"PPAG\", UEFI_PPAG_DATA_SIZE_V5,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-692-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:693:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-694-\t\t\t\t\t      IWL_UEFI_PPAG_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=745=int iwl_uefi_get_tas_table(struct iwl_fw_runtime *fwrt,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-750-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:751:\tuefi_tas = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WTAS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-752-\t\t\t\t\t\t  \"WTAS\", sizeof(*uefi_tas), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=798=int iwl_uefi_get_pwr_limit(struct iwl_fw_runtime *fwrt,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-803-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:804:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_SPLC_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-805-\t\t\t\t\t      \"SPLC\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=821=int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-825-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:826:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WRDD_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-827-\t\t\t\t\t      \"WRDD\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=852=int iwl_uefi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-856-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:857:\tdata = iwl_uefi_get_verified_variable_guid(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-858-\t\t\t\t\t\t   \u0026IWL_EFI_WIFI_BT_GUID,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=876=int iwl_uefi_get_wbem(struct iwl_fw_runtime *fwrt, u32 *value)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-880-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:881:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WBEM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-882-\t\t\t\t\t      \"WBEM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=899=static int iwl_uefi_load_dsm_values(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-905-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:906:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_DSM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-907-\t\t\t\t\t      \"DSM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=976=int iwl_uefi_get_puncturing(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-983-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:984:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-985-\t\t\t\t\t      IWL_UEFI_PUNCTURING_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=1005=int iwl_uefi_get_dsbr(struct iwl_fw_runtime *fwrt, u32 *value)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1009-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1010:\tdata = iwl_uefi_get_verified_variable_guid(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1011-\t\t\t\t\t\t   \u0026IWL_EFI_WIFI_BT_GUID,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=1031=int iwl_uefi_get_phy_filters(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1035-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1036:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WPFC_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1037-\t\t\t\t\t      \"WPFC\", sizeof(*data), NULL);\n"
}

gemini-3.1-pro-preview

null

null

							input: 11241
							output: 47
							thoughts: 138
						

Okay, let me think this through.

**Fuzzing the UEFI Variable Reads in iwl_uefi_get_verified_variable_guid**

Alright, so `iwl_uefi_get_verified_variable_guid` is reading UEFI variables. Interesting. The question now is: can I fuzz this? The answer *should* be yes, given that the kernel reads them. Now, there are a couple of ways this could happen, right? Syzkaller could mock the EFI subsystem and provide fuzzed variables, or there's some *other* path that leads to this. But hang on... I don't think syzkaller directly mocks EFI variables unless there's some explicit mechanism defined for it, at least not that I can recall off the top of my head. 

Wait a minute... didn't I see something else in that code? Oh yeah! `iwl_pnvm_load_reduce_power_to_trans` – that function *also* parses data, but in this case, the data comes from the *filesystem*. So, that could be the entrypoint. I should probably dig into `iwl_pnvm_load_reduce_power_to_trans` to see if that's a viable avenue.

{
  "File": "drivers/net/wireless/intel/iwlwifi/fw/pnvm.c",
  "FirstLine": 406,
  "LineCount": 100
}

{
  "Contents": " 406:\tstatic void\n 407:\tiwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,\n 408:\t\t\t\t\t    const struct iwl_ucode_capabilities *capa,\n 409:\t\t\t\t\t    __le32 sku_id[3])\n 410:\t{\n 411:\t\tstruct iwl_pnvm_image *pnvm_data = NULL;\n 412:\t\tu8 *data = NULL;\n 413:\t\tsize_t length;\n 414:\t\tint ret;\n 415:\t\n 416:\t\tif (trans-\u003efailed_to_load_reduce_power_image)\n 417:\t\t\treturn;\n 418:\t\n 419:\t\tif (trans-\u003ereduce_power_loaded)\n 420:\t\t\tgoto set;\n 421:\t\n 422:\t\tdata = iwl_uefi_get_reduced_power(trans, \u0026length);\n 423:\t\tif (IS_ERR(data)) {\n 424:\t\t\ttrans-\u003efailed_to_load_reduce_power_image = true;\n 425:\t\t\treturn;\n 426:\t\t}\n 427:\t\n 428:\t\tpnvm_data = kzalloc_obj(*pnvm_data);\n 429:\t\tif (!pnvm_data)\n 430:\t\t\tgoto free;\n 431:\t\n 432:\t\tret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data,\n 433:\t\t\t\t\t\t  sku_id);\n 434:\t\tif (ret) {\n 435:\t\t\ttrans-\u003efailed_to_load_reduce_power_image = true;\n 436:\t\t\tgoto free;\n 437:\t\t}\n 438:\t\n 439:\t\tret = iwl_trans_load_reduce_power(trans, pnvm_data, capa);\n 440:\t\tif (ret) {\n 441:\t\t\tIWL_DEBUG_FW(trans,\n 442:\t\t\t\t     \"Failed to load reduce power table %d\\n\",\n 443:\t\t\t\t     ret);\n 444:\t\t\ttrans-\u003efailed_to_load_reduce_power_image = true;\n 445:\t\t\tgoto free;\n 446:\t\t}\n 447:\t\n 448:\tset:\n 449:\t\tiwl_trans_set_reduce_power(trans, capa);\n 450:\tfree:\n 451:\t\tkfree(data);\n 452:\t\tkfree(pnvm_data);\n 453:\t}\n 454:\t\n 455:\tint iwl_pnvm_load(struct iwl_trans *trans,\n 456:\t\t\t  struct iwl_notif_wait_data *notif_wait,\n 457:\t\t\t  const struct iwl_fw *fw, __le32 sku_id[3])\n 458:\t{\n 459:\t\tstruct iwl_notification_wait pnvm_wait;\n 460:\t\tstatic const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,\n 461:\t\t\t\t\t\t\tPNVM_INIT_COMPLETE_NTFY) };\n 462:\t\n 463:\t\t/* if the SKU_ID is empty, there's nothing to do */\n 464:\t\tif (!sku_id[0] \u0026\u0026 !sku_id[1] \u0026\u0026 !sku_id[2])\n 465:\t\t\treturn 0;\n 466:\t\n 467:\t\tiwl_pnvm_load_pnvm_to_trans(trans, fw, sku_id);\n 468:\t\tiwl_pnvm_load_reduce_power_to_trans(trans, \u0026fw-\u003eucode_capa, sku_id);\n 469:\t\n 470:\t\tiwl_init_notification_wait(notif_wait, \u0026pnvm_wait,\n 471:\t\t\t\t\t   ntf_cmds, ARRAY_SIZE(ntf_cmds),\n 472:\t\t\t\t\t   iwl_pnvm_complete_fn, trans);\n 473:\t\n 474:\t\t/* kick the doorbell */\n 475:\t\tiwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,\n 476:\t\t\t\t    UREG_DOORBELL_TO_ISR6_PNVM);\n 477:\t\n 478:\t\treturn iwl_wait_notification(notif_wait, \u0026pnvm_wait,\n 479:\t\t\t\t\t     MVM_UCODE_PNVM_TIMEOUT);\n 480:\t}\n 481:\tIWL_EXPORT_SYMBOL(iwl_pnvm_load);\n"
}

gemini-3.1-pro-preview

null

null

							input: 12927
							output: 46
							thoughts: 59
						

Okay, let's break this down.

**Analyzing Data Source for Power Reduction Information**

Hmm, it seems like `iwl_uefi_get_reduced_power` is the *only* place the system is pulling data from for `iwl_pnvm_load_reduce_power_to_trans`. That's a critical dependency, and a potential single point of failure or bottleneck. I need to revisit that function, `iwl_uefi_get_reduced_power`, with a fine-tooth comb. Any issues there, and the entire power reduction mechanism for the PNVM is compromised. Let's make sure it is functioning correctly.

{
  "File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
  "FirstLine": 285,
  "LineCount": 30
}

{
  "Contents": " 285:\tu8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\n 286:\t{\n 287:\t\tstruct pnvm_sku_package *package;\n 288:\t\tunsigned long package_size;\n 289:\t\tu8 *data;\n 290:\t\n 291:\t\tpackage = iwl_uefi_get_verified_variable(trans,\n 292:\t\t\t\t\t\t\t IWL_UEFI_REDUCED_POWER_NAME,\n 293:\t\t\t\t\t\t\t \"Reduced Power\",\n 294:\t\t\t\t\t\t\t sizeof(*package),\n 295:\t\t\t\t\t\t\t \u0026package_size);\n 296:\t\tif (IS_ERR(package))\n 297:\t\t\treturn ERR_CAST(package);\n 298:\t\n 299:\t\tIWL_DEBUG_FW(trans, \"rev %d, total_size %d, n_skus %d\\n\",\n 300:\t\t\t     package-\u003erev, package-\u003etotal_size, package-\u003en_skus);\n 301:\t\n 302:\t\t*len = package_size - sizeof(*package);\n 303:\t\tdata = kmemdup(package-\u003edata, *len, GFP_KERNEL);\n 304:\t\tif (!data) {\n 305:\t\t\tkfree(package);\n 306:\t\t\treturn ERR_PTR(-ENOMEM);\n 307:\t\t}\n 308:\t\n 309:\t\tkfree(package);\n 310:\t\n 311:\t\treturn data;\n 312:\t}\n 313:\t\n 314:\tstatic int iwl_uefi_step_parse(struct uefi_cnv_common_step_data *common_step_data,\n"
}

gemini-3.1-pro-preview

null

null

							input: 13638
							output: 45
							thoughts: 76
						

Okay, let's see, the system's reading from UEFI variables, interesting. The real question is, how does syzkaller actually *test* this interaction? My first thought is the standard approach – `efivarfs` or something like that, where it mocks the variables directly. But hold on a second... the code path for this seems to be through `iwl_uefi_get_verified_variable`, and *that* calls `efi.get_variable`. Right. So, the key is digging into `iwl_uefi_get_verified_variable`. That's where the interesting stuff likely is. Let's start there.

{
  "File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
  "FirstLine": 82,
  "LineCount": 50
}

{
  "Contents": "  82:\tstatic void *\n  83:\tiwl_uefi_get_verified_variable_guid(struct iwl_trans *trans,\n  84:\t\t\t\t\t    efi_guid_t *guid,\n  85:\t\t\t\t\t    efi_char16_t *uefi_var_name,\n  86:\t\t\t\t\t    char *var_name,\n  87:\t\t\t\t\t    unsigned int expected_size,\n  88:\t\t\t\t\t    unsigned long *size)\n  89:\t{\n  90:\t\tvoid *var;\n  91:\t\tunsigned long var_size;\n  92:\t\n  93:\t\tvar = iwl_uefi_get_variable(uefi_var_name, guid, \u0026var_size);\n  94:\t\n  95:\t\tif (IS_ERR(var)) {\n  96:\t\t\tIWL_DEBUG_RADIO(trans,\n  97:\t\t\t\t\t\"%s UEFI variable not found 0x%lx\\n\", var_name,\n  98:\t\t\t\t\tPTR_ERR(var));\n  99:\t\t\treturn var;\n 100:\t\t}\n 101:\t\n 102:\t\tif (var_size \u003c expected_size) {\n 103:\t\t\tIWL_DEBUG_RADIO(trans,\n 104:\t\t\t\t\t\"Invalid %s UEFI variable len (%lu)\\n\",\n 105:\t\t\t\t\tvar_name, var_size);\n 106:\t\t\tkfree(var);\n 107:\t\t\treturn ERR_PTR(-EINVAL);\n 108:\t\t}\n 109:\t\n 110:\t\tIWL_DEBUG_RADIO(trans, \"%s from UEFI with size %lu\\n\", var_name,\n 111:\t\t\t\tvar_size);\n 112:\t\n 113:\t\tif (size)\n 114:\t\t\t*size = var_size;\n 115:\t\treturn var;\n 116:\t}\n 117:\t\n 118:\tstatic void *\n 119:\tiwl_uefi_get_verified_variable(struct iwl_trans *trans,\n 120:\t\t\t\t       efi_char16_t *uefi_var_name,\n 121:\t\t\t\t       char *var_name,\n 122:\t\t\t\t       unsigned int expected_size,\n 123:\t\t\t\t       unsigned long *size)\n 124:\t{\n 125:\t\treturn iwl_uefi_get_verified_variable_guid(trans, \u0026IWL_EFI_WIFI_GUID,\n 126:\t\t\t\t\t\t\t   uefi_var_name, var_name,\n 127:\t\t\t\t\t\t\t   expected_size, size);\n 128:\t}\n 129:\t\n 130:\tint iwl_uefi_handle_tlv_mem_desc(struct iwl_trans *trans, const u8 *data,\n 131:\t\t\t\t\t u32 tlv_len, struct iwl_pnvm_image *pnvm_data)\n"
}

gemini-3.1-pro-preview

null

null

							input: 14653
							output: 41
							thoughts: 12
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Delving into UEFI Variable Retrieval with iwl_uefi_get_variable**

Alright, so I'm looking at `iwl_uefi_get_variable` and immediately, I'm thinking about the low-level interactions here. This is a crucial function for, I assume, retrieving UEFI variables that are going to be used in the Intel Wireless driver (iwlwifi) context, likely during initialization, firmware loading, or potentially during runtime for configuration.

I need to understand its exact purpose. Is it a direct wrapper around `GetVariable()` from the UEFI runtime services? Are there any significant error checks or retries implemented here? If it's a wrapper, what level of abstraction does it offer? Does it handle the complexities of variable attributes like being read-only or volatile? I have to consider the potential for race conditions or access violations if multiple processes are trying to manipulate or access the same variables simultaneously.

Beyond that, I'm immediately interested in the potential impact on system performance. How efficiently is it interacting with the firmware? What's the overhead involved in the communication? Is there any caching implemented, and what are the implications of the cache invalidation strategy?

Furthermore, I have to consider the security implications, of course. Are there any known vulnerabilities related to UEFI variable access that this function might inadvertently expose? Could a malicious actor leverage a vulnerability in the variable retrieval process for a system compromise? Are there any checks for potentially malicious UEFI variables?

Finally, what’s the error handling? How does it handle scenarios where the variable doesn’t exist, the firmware returns an error, or the buffer is too small? What are the return codes or error codes it uses, and how does that propagate up the call stack to the rest of the driver? The robustness of the error handling will likely be the first point of vulnerability.

{
  "Expression": "iwl_uefi_get_variable",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c=23=struct iwl_uefi_pnvm_mem_desc {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-28-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:29:static void *iwl_uefi_get_variable(efi_char16_t *name, efi_guid_t *guid,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-30-\t\t\t\t   unsigned long *data_size)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=60=void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-66-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:67:\tdata = iwl_uefi_get_variable(IWL_UEFI_OEM_PNVM_NAME, \u0026IWL_EFI_WIFI_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-68-\t\t\t\t     \u0026package_size);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=83=iwl_uefi_get_verified_variable_guid(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-92-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:93:\tvar = iwl_uefi_get_variable(uefi_var_name, guid, \u0026var_size);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-94-\n"
}

gemini-3.1-pro-preview

null

null

							input: 15588
							output: 45
							thoughts: 15
						

Okay, let's dive into this. Here's my take on `iwl_uefi_get_variable`, viewed through the lens of my expertise:

**My Perspective on `iwl_uefi_get_variable`**

Alright, so we're looking at `iwl_uefi_get_variable`, which immediately tells me this function is likely within the context of an Intel wireless device driver, probably on a system that leverages UEFI. The "iwl" prefix is a dead giveaway – it screams Intel Wireless LAN. And that "uefi" part? It means we're dealing with interactions with the UEFI firmware, specifically to retrieve a variable.

My first thought is, "why are we querying a UEFI variable?".  It could be anything from boot-time configuration, hardware-specific settings, a unique identifier, or something related to a specific feature like secure boot status. This function is the gateway to fetching that information.  We'll need to figure out *what* variable is being fetched by looking at the broader context of the driver and how it's used.

The interesting aspect will be *how* it's done. I'm already anticipating we'll be dealing with UEFI runtime services (likely using a GUID to identify the variable) and handling the various error codes that come with interacting with firmware. There could be issues with variable permissions, incorrect buffer sizes, or the variable simply not existing in the first place. Error handling will be critical here, and I'll want to see how robustly it's implemented. I'm going to be looking for checks on return values from the UEFI runtime service calls and how the driver deals with the various failures.

I'm also curious about the potential security implications. If this function is poorly implemented, it could introduce vulnerabilities. Improperly validated input parameters could lead to buffer overflows or information leaks. I'll need to scrutinize any data that’s passed from or returned to the UEFI firmware for any potential vulnerabilities.

Overall, `iwl_uefi_get_variable` has me thinking about UEFI runtime interactions, error handling, potential security implications, and the specific use case within this Intel wireless driver. My curiosity is definitely piqued, let's see what's really happening!

{
  "File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
  "FirstLine": 29,
  "LineCount": 30
}

{
  "Contents": "  29:\tstatic void *iwl_uefi_get_variable(efi_char16_t *name, efi_guid_t *guid,\n  30:\t\t\t\t\t   unsigned long *data_size)\n  31:\t{\n  32:\t\tefi_status_t status;\n  33:\t\tvoid *data;\n  34:\t\n  35:\t\tif (!data_size)\n  36:\t\t\treturn ERR_PTR(-EINVAL);\n  37:\t\n  38:\t\tif (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))\n  39:\t\t\treturn ERR_PTR(-ENODEV);\n  40:\t\n  41:\t\t/* first call with NULL data to get the exact entry size */\n  42:\t\t*data_size = 0;\n  43:\t\tstatus = efi.get_variable(name, guid, NULL, data_size, NULL);\n  44:\t\tif (status != EFI_BUFFER_TOO_SMALL || !*data_size)\n  45:\t\t\treturn ERR_PTR(-EIO);\n  46:\t\n  47:\t\tdata = kmalloc(*data_size, GFP_KERNEL);\n  48:\t\tif (!data)\n  49:\t\t\treturn ERR_PTR(-ENOMEM);\n  50:\t\n  51:\t\tstatus = efi.get_variable(name, guid, NULL, data_size, data);\n  52:\t\tif (status != EFI_SUCCESS) {\n  53:\t\t\tkfree(data);\n  54:\t\t\treturn ERR_PTR(-ENOENT);\n  55:\t\t}\n  56:\t\n  57:\t\treturn data;\n  58:\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 16553
							output: 39
							thoughts: 552
						

**Analyzing the Fuzzing Potential of an EFI Variable Interaction in iwlwifi**

Okay, so this patch touches `efi.get_variable`, which immediately makes me think, "Can syzkaller fuzz this?" We know syzkaller can hit EFI variables if it can write to `/sys/firmware/efi/efivars/`, which it definitely can. Then I remember that `iwlwifi` loads something during initialization. Aha! If syzkaller writes to `/sys/firmware/efi/efivars/` *before* triggering `iwlwifi` initialization – by binding the driver or creating a virtual device – we could have a fuzzing target!

But hold on, `iwlwifi` is a PCI driver. Can syzkaller do virtual PCI devices? It has something like `syz_pci_device`, right? The question is, does it *mock* `iwlwifi` specifically? Thinking about it, syzkaller *does* have `mac80211_hwsim`, which is virtual, but that's not the same. `iwlwifi` seems to need either a real PCI device or a *mocked* one. Okay, syzkaller does have some PCI fuzzing support; `vhci`, `vfio`, and the `syz_pci_device` calls come to mind.

The patch itself is located in `drivers/net/wireless/intel/iwlwifi/fw/uefi.c`. If syzkaller is testing this, it *should* be reachable. Wait a minute... the author is `syz-cluster <triage@syzkaller.com>`! That means syzkaller found the bug and this is the fix!

Now I need to remember what the prompt says: "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". Since *syzkaller* found the bug, it *must* be reachable in syzkaller's environment! But how? Was it `mac80211_hwsim`? No, that's a different driver. So, `syz_pci_device` then? Yes, that's the likely mechanism syzkaller uses to emulate PCI devices!

Now I just need to verify that `iwlwifi` is enabled in the configuration, so I need to output `EnableConfigs`. Let's check the Kconfig entry for `iwlwifi`.

{
  "Expression": "config IWLWIFI",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/Kconfig"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/Kconfig-1-# SPDX-License-Identifier: GPL-2.0-only\ndrivers/net/wireless/intel/iwlwifi/Kconfig:2:config IWLWIFI\ndrivers/net/wireless/intel/iwlwifi/Kconfig-3-\ttristate \"Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi) \"\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=47=if IWLWIFI\ndrivers/net/wireless/intel/iwlwifi/Kconfig-48-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:49:config IWLWIFI_KUNIT_TESTS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-50-\ttristate\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-57-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:58:config IWLWIFI_LEDS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-59-\tbool\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=84=config IWLMLD\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-94-# don't call it _MODULE -- will confuse Kconfig/fixdep/...\ndrivers/net/wireless/intel/iwlwifi/Kconfig:95:config IWLWIFI_OPMODE_MODULAR\ndrivers/net/wireless/intel/iwlwifi/Kconfig-96-\tbool\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=105=menu \"Debugging Options\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig-106-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:107:config IWLWIFI_DEBUG\ndrivers/net/wireless/intel/iwlwifi/Kconfig-108-\tbool \"Enable full debugging output in the iwlwifi driver\"\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-130-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:131:config IWLWIFI_DEBUGFS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-132-\tbool \"iwlwifi debugfs support\"\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-138-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:139:config IWLWIFI_DEVICE_TRACING\ndrivers/net/wireless/intel/iwlwifi/Kconfig-140-\tbool \"iwlwifi device access tracing\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 18350
							output: 34
							thoughts: 52
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**IWlwifi Configuration Deep Dive**

Alright, so I'm thinking about `IWLWIFI`. That's the main configuration option, but I need to be sure I haven't overlooked any other dependent configs, particularly for UEFI support within `iwlwifi`. It's a key area to nail down if we want full functionality and that includes being able to boot reliably.

My next step is to dive into the build system to confirm. I'm going to check the `drivers/net/wireless/intel/iwlwifi/Makefile` and `fw/Makefile` to see if there are any specific options or conditions that dictate the inclusion of UEFI-related components or firmware. That's usually where these sorts of dependencies are defined. If it's not explicit, I'll need to chase down the include paths.

{
  "Expression": "uefi",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 762 lines.\nUse more precise expression if possible.\n\ndrivers/net/wireless/intel/iwlwifi/Makefile=39=iwlwifi-$(CONFIG_ACPI) += fw/acpi.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:40:iwlwifi-$(CONFIG_EFI)\t+= fw/uefi.o\ndrivers/net/wireless/intel/iwlwifi/Makefile-41-iwlwifi-$(CONFIG_IWLWIFI_DEBUGFS) += fw/debugfs.o\n--\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c=1129=void iwl_acpi_get_guid_lock_status(struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c-1152-\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c:1153:\tfwrt-\u003euefi_tables_lock_status =\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c-1154-\t\twifi_pkg-\u003epackage.elements[1].integer.value;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c-1157-\t\t\t\"Loaded UEFI WIFI GUID lock status: %d from ACPI\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c:1158:\t\t\tfwrt-\u003euefi_tables_lock_status);\ndrivers/net/wireless/intel/iwlwifi/fw/acpi.c-1159-out_free:\n--\ndrivers/net/wireless/intel/iwlwifi/fw/file.h=1039=struct iwl_fw_cmd_version {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/file.h-1050- * @max_acpi_revision: max supported ACPI revision of command.\ndrivers/net/wireless/intel/iwlwifi/fw/file.h:1051: * @max_uefi_revision: max supported UEFI revision of command.\ndrivers/net/wireless/intel/iwlwifi/fw/file.h-1052- */\ndrivers/net/wireless/intel/iwlwifi/fw/file.h=1053=struct iwl_fw_cmd_bios_table {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/file.h-1056-\tu8 max_acpi_revision;\ndrivers/net/wireless/intel/iwlwifi/fw/file.h:1057:\tu8 max_uefi_revision;\ndrivers/net/wireless/intel/iwlwifi/fw/file.h-1058-} __packed;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/img.c=9=u8 iwl_fw_lookup_cmd_bios_supported_revision(const struct iwl_fw *fw,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/img.c-30-\t\t\t\treturn entry-\u003emax_acpi_revision;\ndrivers/net/wireless/intel/iwlwifi/fw/img.c:31:\t\t\treturn entry-\u003emax_uefi_revision;\ndrivers/net/wireless/intel/iwlwifi/fw/img.c-32-\t\t}\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-12-#include \"fw/api/alive.h\"\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:13:#include \"fw/uefi.h\"\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-14-#include \"fw/img.h\"\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c=36=static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-133-\t\tcase IWL_UCODE_TLV_MEM_DESC:\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:134:\t\t\tif (iwl_uefi_handle_tlv_mem_desc(trans, data, tlv_len,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-135-\t\t\t\t\t\t\t pnvm_data))\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c=307=static const u8 *iwl_get_pnvm_image(struct iwl_trans *trans_p, size_t *len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-320-\tif (pnvm_src == IWL_PNVM_SOURCE_BIOS) {\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:321:\t\tpackage = iwl_uefi_get_pnvm(trans_p, len);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-322-\t\tif (!IS_ERR_OR_NULL(package)) {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c=407=iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-421-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:422:\tdata = iwl_uefi_get_reduced_power(trans, \u0026length);\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-423-\tif (IS_ERR(data)) {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-431-\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c:432:\tret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data,\ndrivers/net/wireless/intel/iwlwifi/fw/pnvm.c-433-\t\t\t\t\t  sku_id);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c-9-#include \"fw/runtime.h\"\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c:10:#include \"fw/uefi.h\"\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c-11-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c=13=do {\t\t\t\t\t\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c-14-\tint ret = -ENOENT;\t\t\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c:15:\tif (fwrt-\u003euefi_tables_lock_status \u003e UEFI_WIFI_GUID_UNLOCKED)\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c:16:\t\tret = iwl_uefi_get_ ## __name(__VA_ARGS__);\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/regulatory.c-17-\tif (ret \u003c 0)\t\t\t\t\t\t\t\\\n--\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h=88=struct iwl_txf_iter_data {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h-110- * @ap_type_cmd_valid: if \u0026ap_type_cmd is valid\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h:111: * @uefi_tables_lock_status: The status of the WIFI GUID UEFI variables lock:\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h-112- *\t0: Unlocked, 1 and 2: Locked.\n--\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h=148=struct iwl_fw_runtime {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h-219-\tbool ap_type_cmd_valid;\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h:220:\tu8 uefi_tables_lock_status;\ndrivers/net/wireless/intel/iwlwifi/fw/runtime.h-221-\tstruct iwl_phy_specific_cfg phy_filters;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-10-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:11:#include \"fw/uefi.h\"\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-12-#include \"fw/api/alive.h\"\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-22-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:23:struct iwl_uefi_pnvm_mem_desc {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-24-\t__le32 addr;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-28-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:29:static void *iwl_uefi_get_variable(efi_char16_t *name, efi_guid_t *guid,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-30-\t\t\t\t   unsigned long *data_size)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-59-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:60:void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-61-{\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-66-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:67:\tdata = iwl_uefi_get_variable(IWL_UEFI_OEM_PNVM_NAME, \u0026IWL_EFI_WIFI_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-68-\t\t\t\t     \u0026package_size);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=82=static void *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:83:iwl_uefi_get_verified_variable_guid(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-84-\t\t\t\t    efi_guid_t *guid,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:85:\t\t\t\t    efi_char16_t *uefi_var_name,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-86-\t\t\t\t    char *var_name,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-92-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:93:\tvar = iwl_uefi_get_variable(uefi_var_name, guid, \u0026var_size);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-94-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c=118=static void *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:119:iwl_uefi_get_verified_variable(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:120:\t\t\t       efi_char16_t *uefi_var_name,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-121-\t\t\t       char *var_name,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-124-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:125:\treturn iwl_uefi_get_verified_variable_guid(trans, \u0026IWL_EFI_WIFI_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:126:\t\t\t\t\t\t   uefi_var_name, var_name,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-127-\t\t\t\t\t\t   expected_size, size);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-129-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:130:int iwl_uefi_handle_tlv_mem_desc(struct iwl_trans *trans, const u8 *data,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-131-\t\t\t\t u32 tlv_len, struct iwl_pnvm_image *pnvm_data)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-132-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:133:\tconst struct iwl_uefi_pnvm_mem_desc *desc = (const void *)data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-134-\tu32 data_len;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-165-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:166:static int iwl_uefi_reduce_power_section(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-167-\t\t\t\t\t const u8 *data, size_t len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-193-\t\tcase IWL_UCODE_TLV_MEM_DESC:\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:194:\t\t\tif (iwl_uefi_handle_tlv_mem_desc(trans, data, tlv_len,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-195-\t\t\t\t\t\t\t pnvm_data))\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-219-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:220:int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-221-\t\t\t\tconst u8 *data, size_t len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-267-\t\t\t    sku_id[2] == tlv_sku_id-\u003edata[2]) {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:268:\t\t\t\tint ret = iwl_uefi_reduce_power_section(trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-269-\t\t\t\t\t\t\t\t    data, len,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-284-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:285:u8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-286-{\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-290-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:291:\tpackage = iwl_uefi_get_verified_variable(trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-292-\t\t\t\t\t\t IWL_UEFI_REDUCED_POWER_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-313-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:314:static int iwl_uefi_step_parse(struct uefi_cnv_common_step_data *common_step_data,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-315-\t\t\t       struct iwl_trans *trans)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-328-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:329:void iwl_uefi_get_step_table(struct iwl_trans *trans)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-330-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:331:\tstruct uefi_cnv_common_step_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-332-\tint ret;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-336-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:337:\tdata = iwl_uefi_get_verified_variable_guid(trans, \u0026IWL_EFI_WIFI_BT_GUID,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-338-\t\t\t\t\t\t   IWL_UEFI_STEP_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-342-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:343:\tret = iwl_uefi_step_parse(data, trans);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-344-\tif (ret \u003c 0)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-348-}\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:349:IWL_EXPORT_SYMBOL(iwl_uefi_get_step_table);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-350-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:351:static int iwl_uefi_sgom_parse(struct uefi_cnv_wlan_sgom_data *sgom_data,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-352-\t\t\t       struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-382-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:383:void iwl_uefi_get_sgom_table(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-384-\t\t\t     struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-385-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:386:\tstruct uefi_cnv_wlan_sgom_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-387-\tint ret;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-391-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:392:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_SGOM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-393-\t\t\t\t\t      \"SGOM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-396-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:397:\tret = iwl_uefi_sgom_parse(data, fwrt);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-398-\tif (ret \u003c 0)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-402-}\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:403:IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-404-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:405:static int iwl_uefi_uats_parse(struct uefi_cnv_wlan_uats_data *uats_data,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-406-\t\t\t       struct iwl_fw_runtime *fwrt)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-419-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:420:void iwl_uefi_get_uats_table(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-421-\t\t\t     struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-422-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:423:\tstruct uefi_cnv_wlan_uats_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-424-\tint ret;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-425-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:426:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_UATS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-427-\t\t\t\t\t      \"UATS\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-430-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:431:\tret = iwl_uefi_uats_parse(data, fwrt);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-432-\tif (ret \u003c 0)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-435-}\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:436:IWL_EXPORT_SYMBOL(iwl_uefi_get_uats_table);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-437-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:438:void iwl_uefi_get_uneb_table(struct iwl_trans *trans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-439-\t\t\t     struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-440-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:441:\tstruct uefi_cnv_wlan_uneb_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-442-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:443:\tdata = iwl_uefi_get_verified_variable(trans, IWL_UEFI_UNEB_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-444-\t\t\t\t\t      \"UNEB\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-465-}\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:466:IWL_EXPORT_SYMBOL(iwl_uefi_get_uneb_table);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-467-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:468:static void iwl_uefi_set_sar_profile(struct iwl_fw_runtime *fwrt,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-469-\t\t\t\t     const u8 *vals, u8 prof_index,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-496-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:497:int iwl_uefi_get_wrds_table(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-498-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:499:\tstruct uefi_cnv_var_wrds *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-500-\tunsigned long size;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-504-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:505:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WRDS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-506-\t\t\t\t\t      \"WRDS\",\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-537-\t */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:538:\tiwl_uefi_set_sar_profile(fwrt, data-\u003evals, 0,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-539-\t\t\t\t num_subbands, data-\u003emode);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-544-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:545:int iwl_uefi_get_ewrd_table(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-546-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:547:\tstruct uefi_cnv_var_ewrd *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-548-\tunsigned long expected_size;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-553-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:554:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_EWRD_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-555-\t\t\t\t\t      \"EWRD\",\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-590-\t\t */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:591:\t\tiwl_uefi_set_sar_profile(fwrt, \u0026data-\u003evals[i * profile_size],\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-592-\t\t\t\t\t i + 1, num_subbands, data-\u003emode);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-598-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:599:int iwl_uefi_get_wgds_table(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-600-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:601:\tstruct uefi_cnv_var_wgds *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-602-\tunsigned long expected_size;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-607-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:608:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WGDS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-609-\t\t\t\t\t      \"WGDS\", UEFI_WGDS_TABLE_SIZE_REV3,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-675-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:676:int iwl_uefi_get_ppag_table(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-677-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:678:\tstruct uefi_cnv_var_ppag *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-679-\tint n_subbands;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-682-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:683:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_PPAG_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-684-\t\t\t\t\t      \"PPAG\", UEFI_PPAG_DATA_SIZE_V5,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-692-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:693:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-694-\t\t\t\t\t      IWL_UEFI_PPAG_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-744-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:745:int iwl_uefi_get_tas_table(struct iwl_fw_runtime *fwrt,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-746-\t\t\t   struct iwl_tas_data *tas_data)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-747-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:748:\tstruct uefi_cnv_var_wtas *uefi_tas;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-749-\tint ret, enabled;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-750-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:751:\tuefi_tas = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WTAS_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:752:\t\t\t\t\t\t  \"WTAS\", sizeof(*uefi_tas), NULL);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:753:\tif (IS_ERR(uefi_tas))\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-754-\t\treturn -EINVAL;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-755-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:756:\tif (uefi_tas-\u003erevision \u003c IWL_UEFI_MIN_WTAS_REVISION ||\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:757:\t    uefi_tas-\u003erevision \u003e IWL_UEFI_MAX_WTAS_REVISION) {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-758-\t\tret = -EINVAL;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-759-\t\tIWL_DEBUG_RADIO(fwrt, \"Unsupported UEFI WTAS revision:%d\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:760:\t\t\t\tuefi_tas-\u003erevision);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-761-\t\tgoto out;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-764-\tIWL_DEBUG_RADIO(fwrt, \"TAS selection as read from BIOS: 0x%x\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:765:\t\t\tuefi_tas-\u003etas_selection);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-766-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:767:\tenabled = uefi_tas-\u003etas_selection \u0026 IWL_WTAS_ENABLED_MSK;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-768-\ttas_data-\u003etable_source = BIOS_SOURCE_UEFI;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:769:\ttas_data-\u003etable_revision = uefi_tas-\u003erevision;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:770:\ttas_data-\u003etas_selection = uefi_tas-\u003etas_selection;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-771-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-775-\tIWL_DEBUG_RADIO(fwrt, \"Reading TAS table revision %d\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:776:\t\t\tuefi_tas-\u003erevision);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:777:\tif (uefi_tas-\u003eblack_list_size \u003e IWL_WTAS_BLACK_LIST_MAX) {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-778-\t\tIWL_DEBUG_RADIO(fwrt, \"TAS invalid array size %d\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:779:\t\t\t\tuefi_tas-\u003eblack_list_size);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-780-\t\tret = -EINVAL;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-783-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:784:\ttas_data-\u003eblock_list_size = uefi_tas-\u003eblack_list_size;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:785:\tIWL_DEBUG_RADIO(fwrt, \"TAS array size %u\\n\", uefi_tas-\u003eblack_list_size);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-786-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:787:\tfor (u8 i = 0; i \u003c uefi_tas-\u003eblack_list_size; i++) {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:788:\t\ttas_data-\u003eblock_list_array[i] = uefi_tas-\u003eblack_list[i];\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-789-\t\tIWL_DEBUG_RADIO(fwrt, \"TAS block list country %d\\n\",\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:790:\t\t\t\tuefi_tas-\u003eblack_list[i]);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-791-\t}\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-793-out:\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:794:\tkfree(uefi_tas);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-795-\treturn ret;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-797-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:798:int iwl_uefi_get_pwr_limit(struct iwl_fw_runtime *fwrt,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-799-\t\t\t   u64 *dflt_pwr_limit)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-800-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:801:\tstruct uefi_cnv_var_splc *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-802-\tint ret = 0;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-803-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:804:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_SPLC_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-805-\t\t\t\t\t      \"SPLC\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-820-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:821:int iwl_uefi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-822-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:823:\tstruct uefi_cnv_var_wrdd *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-824-\tint ret = 0;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-825-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:826:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WRDD_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-827-\t\t\t\t\t      \"WRDD\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-851-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:852:int iwl_uefi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-853-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:854:\tstruct uefi_cnv_var_eckv *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-855-\tint ret = 0;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-856-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:857:\tdata = iwl_uefi_get_verified_variable_guid(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-858-\t\t\t\t\t\t   \u0026IWL_EFI_WIFI_BT_GUID,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-875-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:876:int iwl_uefi_get_wbem(struct iwl_fw_runtime *fwrt, u32 *value)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-877-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:878:\tstruct uefi_cnv_wlan_wbem_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-879-\tint ret = 0;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-880-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:881:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WBEM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-882-\t\t\t\t\t      \"WBEM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-898-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:899:static int iwl_uefi_load_dsm_values(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-900-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:901:\tstruct uefi_cnv_var_general_cfg *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-902-\tint ret = -EINVAL;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-905-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:906:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_DSM_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-907-\t\t\t\t\t      \"DSM\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-947-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:948:int iwl_uefi_get_dsm(struct iwl_fw_runtime *fwrt, enum iwl_dsm_funcs func,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-949-\t\t     u32 *value)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-955-\tif (!fwrt-\u003edsm_funcs_valid) {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:956:\t\tint ret = iwl_uefi_load_dsm_values(fwrt);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-957-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-975-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:976:int iwl_uefi_get_puncturing(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-977-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:978:\tstruct uefi_cnv_var_puncturing_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-979-\t/* default value is not enabled if there is any issue in reading\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:980:\t * uefi variable or revision is not supported\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-981-\t */\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-983-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:984:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-985-\t\t\t\t\t      IWL_UEFI_PUNCTURING_NAME,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1002-}\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1003:IWL_EXPORT_SYMBOL(iwl_uefi_get_puncturing);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1004-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1005:int iwl_uefi_get_dsbr(struct iwl_fw_runtime *fwrt, u32 *value)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1006-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1007:\tstruct uefi_cnv_wlan_dsbr_data *data;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1008-\tint ret = 0;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1009-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1010:\tdata = iwl_uefi_get_verified_variable_guid(fwrt-\u003etrans,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1011-\t\t\t\t\t\t   \u0026IWL_EFI_WIFI_BT_GUID,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1030-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1031:int iwl_uefi_get_phy_filters(struct iwl_fw_runtime *fwrt)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1032-{\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1033:\tstruct uefi_cnv_wpfc_data *data __free(kfree);\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1034-\tstruct iwl_phy_specific_cfg *filters = \u0026fwrt-\u003ephy_filters;\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1035-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c:1036:\tdata = iwl_uefi_get_verified_variable(fwrt-\u003etrans, IWL_UEFI_WPFC_NAME,\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.c-1037-\t\t\t\t\t      \"WPFC\", sizeof(*data), NULL);\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-4- */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:5:#ifndef __iwl_fw_uefi__\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:6:#define __iwl_fw_uefi__\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-7-\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h=44=struct pnvm_sku_package {\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-51-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:52:struct uefi_cnv_wlan_sgom_data {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-53-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-56-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:57:struct uefi_cnv_wlan_uats_data {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-58-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-62-/* UNEB's layout is identical to UATS's */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:63:#define uefi_cnv_wlan_uneb_data uefi_cnv_wlan_uats_data\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-64-\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:65:struct uefi_cnv_common_step_data {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-66-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-86-/**\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:87: * struct uefi_cnv_var_wrds - WRDS table as defined in UEFI\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-88- *\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-97- */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:98:struct uefi_cnv_var_wrds {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-99-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-112-#define UEFI_SAR_WRDS_TABLE_SIZE_REV2\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:113:\t(offsetof(struct uefi_cnv_var_wrds, vals) +\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-114-\t UEFI_SAR_PROFILE_SIZE_REV2)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-116-#define UEFI_SAR_WRDS_TABLE_SIZE_REV3\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:117:\t(offsetof(struct uefi_cnv_var_wrds, vals) +\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-118-\t UEFI_SAR_PROFILE_SIZE_REV3)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-120-/**\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:121: * struct uefi_cnv_var_ewrd - EWRD table as defined in UEFI\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-122- * @revision: the revision of the table\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-125- * @vals: the additional SAR profiles (#2-#4) as an array of SAR profiles.\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:126: *\tA SAR profile is defined the \u0026struct uefi_cnv_var_wrds::vals. The size\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-127- *\tof each profile depends on the number of subbands which depends on the\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:128: *\trevision. This is explained in \u0026struct uefi_cnv_var_wrds.\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-129- */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:130:struct uefi_cnv_var_ewrd {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-131-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-137-#define UEFI_SAR_EWRD_TABLE_SIZE_REV2\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:138:\t(offsetof(struct uefi_cnv_var_ewrd, vals) +\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-139-\t UEFI_SAR_PROFILE_SIZE_REV2 * (BIOS_SAR_MAX_PROFILE_NUM - 1))\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-141-#define UEFI_SAR_EWRD_TABLE_SIZE_REV3\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:142:\t(offsetof(struct uefi_cnv_var_ewrd, vals) +\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-143-\t UEFI_SAR_PROFILE_SIZE_REV3 * (BIOS_SAR_MAX_PROFILE_NUM - 1))\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-145-/**\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:146: * struct uefi_cnv_var_wgds - WGDS table as defined in UEFI\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-147- * @revision: the revision of the table\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-155- */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:156:struct uefi_cnv_var_wgds {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-157-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-169-#define UEFI_WGDS_TABLE_SIZE_REV3\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:170:\t(offsetof(struct uefi_cnv_var_wgds, vals) +\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-171-\t UEFI_WGDS_PROFILE_SIZE_REV3 * BIOS_GEO_MAX_PROFILE_NUM)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-173-#define UEFI_WGDS_TABLE_SIZE_REV4\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:174:\t(offsetof(struct uefi_cnv_var_wgds, vals) +\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-175-\t UEFI_WGDS_PROFILE_SIZE_REV4 * BIOS_GEO_MAX_PROFILE_NUM)\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-177-/**\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:178: * struct uefi_cnv_var_ppag - PPAG table as defined in UEFI\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-179- * @revision: the revision of the table\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-187- */\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:188:struct uefi_cnv_var_ppag {\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-189-\tu8 revision;\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-194-#define UEFI_PPAG_DATA_SIZE_V4\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:195:\t(offsetof(struct uefi_cnv_var_ppag, vals) +\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-196-\tsizeof(s8) * UEFI_PPAG_NUM_CHAINS * UEFI_PPAG_SUB_BANDS_NUM_REV4)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-197-#define UEFI_PPAG_DATA_SIZE_V5\t\t\t\t\\\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:198:\t(offsetof(struct uefi_cnv_var_ppag, vals) +\t\\\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 33255
							output: 40
							thoughts: 713
						

**Analyzing a WiFi Driver Patch**

Okay, let's break this down. First, `iwlwifi-$(CONFIG_EFI) += fw/uefi.o`. So, `CONFIG_EFI` is a requirement for compiling `fw/uefi.c`. Right, let me confirm that `CONFIG_EFI` is definitely needed. Yup, got it. Hmm, are there any other related configurations? Let's see... it's `CONFIG_IWLWIFI` and `CONFIG_EFI`. I seem to recall `CONFIG_EFI` often being enabled in syzkaller configurations. But, what about the dependencies? Specifically `CONFIG_MAC80211` or `CONFIG_CFG80211`? I know that `IWLWIFI` either selects or depends on them, so let me quickly re-examine the `drivers/net/wireless/intel/iwlwifi/Kconfig` file. Ok, yes, `config IWLWIFI` depends on `PCI && MAC80211 && HAS_IOMEM`.

Now, let's get back to the patch itself.

```c
			if (tlv_len < sizeof(*tlv_sku_id)) {
				IWL_ERR(trans, "invalid PNVM SKU TLV len: %u\n",
					tlv_len);
				return -EINVAL;
			}
```

This is clearly a functional change. It's designed to prevent an out-of-bounds read when `tlv_len` is smaller than the size of the `tlv_sku_id` structure. Wait, `tlv_sku_id` is a `struct iwl_sku_id`.

```c
struct iwl_sku_id {
	__le32 data[3];
} __packed;
```

So, if `tlv_len` is less than 12, the code would be trying to access `tlv_sku_id->data[0]`, `data[1]`, and `data[2]` beyond the bounds of the provided TLV, right? Exactly. Therefore, this is a legitimate functional fix, preventing a potentially serious memory read vulnerability.

The real question is, is this code path reachable? Okay, `iwl_uefi_reduce_power_parse` is called during firmware initialization if the UEFI variable `IWL_UEFI_REDUCED_POWER_NAME` is present. And, syzkaller can easily create this UEFI variable, thus triggering iwlwifi initialization. Wait, `iwl_pnvm_load_reduce_power_to_trans` is called from `iwl_pnvm_load`. `iwl_pnvm_load` is called from `iwl_mvm_load_ucode_wait_alive` and `iwl_mld_run_fw_init_sequence`. These are all part of the standard driver initialization flow when the firmware is loaded. So, yes, it's reachable during normal driver operation.

So, just to be absolutely clear:

The key functions are:
- `iwl_uefi_reduce_power_parse`
- `iwl_pnvm_load_reduce_power_to_trans`
- `iwl_uefi_get_reduced_power`

And the required configurations are:
- `IWLWIFI`
- `EFI`

Now, let me just double-check, is `IWLWIFI` sufficient? `CONFIG_IWLWIFI` is indeed the primary configuration, but should I consider `CONFIG_IWLWIFI_MVM` or `CONFIG_IWLWIFI_BSS`? Let me quickly re-examine `drivers/net/wireless/intel/iwlwifi/Kconfig` to confirm.

no matches

{
  "Expression": "config IWLWIFI_MVM",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 34848
							output: 42
							thoughts: 33
						

Okay, here's my interpretation of that thought process, from an expert's perspective:

**Initial Assessment: Locating the IWLWIFI_MVM Configuration**

Alright, hang on a second. My mental map of the kernel source tree is usually pretty solid, but for a split second, I had to double-check that location. *IWLWIFI_MVM*... right, that's the multi-virtual machine stuff for the Intel wireless driver. But the Kconfig file for *that* specific component? My first instinct was it would probably be in the core iwlwifi directory, but it's often compartmentalized. Let me quickly solidify in my mind that it's located under `drivers/net/wireless/intel/iwlwifi/mvm/Kconfig`. That specific path tells me how modular it is. This probably means it's a well-defined and potentially independent module within the larger Intel wireless driver framework. Good. Knowing *exactly* where the configuration lives is key for understanding its dependencies and build options. Now I can move forward, confident that I know where to look if I need to adjust settings related to that particular section.

no matches

{
  "Expression": "config IWLWIFI",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/mvm/Kconfig"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 35182
							output: 30
							thoughts: 25
						

Here's my thought process, as if I were considering this myself:

**Kconfig Hunt in iwlwifi**

Okay, so I need to get my bearings in the iwlwifi code. I'm trying to figure out which Kconfig files are relevant here. The first logical step is to see what's actually *there*. I should probably start by doing a quick `ls` in the `drivers/net/wireless/intel/iwlwifi/` directory. That'll give me a list of all the files and subdirectories, making it easier to spot likely candidates for Kconfig files. Knowing the general structure, I expect to see `Kconfig` files sprinkled around, possibly in subdirectories representing different wireless card families or feature sets. I also anticipate there could be a top-level `Kconfig` that includes others. Let's see what we find.

{
  "Dir": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Files": [
    "iwl-agn-hw.h",
    "iwl-config.h",
    "iwl-csr.h",
    "iwl-dbg-tlv.c",
    "iwl-dbg-tlv.h",
    "iwl-debug.c",
    "iwl-debug.h",
    "iwl-devtrace-data.h",
    "iwl-devtrace-io.h",
    "iwl-devtrace-iwlwifi.h",
    "iwl-devtrace-msg.h",
    "iwl-devtrace-ucode.h",
    "iwl-devtrace.c",
    "iwl-devtrace.h",
    "iwl-drv.c",
    "iwl-drv.h",
    "iwl-fh.h",
    "iwl-io.c",
    "iwl-io.h",
    "iwl-modparams.h",
    "iwl-nvm-parse.c",
    "iwl-nvm-parse.h",
    "iwl-nvm-utils.c",
    "iwl-nvm-utils.h",
    "iwl-op-mode.h",
    "iwl-phy-db.c",
    "iwl-phy-db.h",
    "iwl-prph.h",
    "iwl-scd.h",
    "iwl-trans.c",
    "iwl-trans.h",
    "iwl-utils.c",
    "iwl-utils.h"
  ],
  "Subdirs": [
    "cfg",
    "dvm",
    "fw",
    "mei",
    "mld",
    "mvm",
    "pcie",
    "tests"
  ]
}

gemini-3.1-pro-preview

null

null

							input: 35819
							output: 39
							thoughts: 26
						

Here's my thought process, as requested:

**Debugging the Wireless Driver Configuration**

Okay, so I'm digging into this wireless driver issue and my immediate instinct is to look at the configuration. I need to understand how the feature in question is being enabled or disabled. Given that this seems to be an Intel wireless driver, my first stop is likely going to be in the `drivers/net/wireless/intel/iwlwifi/mvm/` directory. Within that, I'm pretty sure there's a `Kconfig` file. That's the standard place for defining configuration options for kernel modules, and that's where I need to start my investigation. It's the key to understanding how these features are enabled, disabled, or conditionally compiled. If this driver is like the others I've worked with, this is the most likely location for finding the specific Kconfig file to review. I'll start there and see if I can trace the relevant configuration options.

no matches

{
  "Expression": "config ",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/mvm/Kconfig"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 36104
							output: 40
							thoughts: 15
						

Okay, here's my summary, framed as my internal thought process:

**Where's That Dang Definition?**

Okay, hold on a second... I'm looking at this code and trying to trace a function call, and I've hit a snag. What the heck is `IWLWIFI_MVM`? It's mentioned here, clearly, but I'm drawing a blank. Is it a macro, a constant, a structure, an enum, what? I need to understand what `IWLWIFI_MVM` actually *is* to make any headway. Time to go hunting for its definition. I need to figure out the scope, the context, and how it's being used. I can't proceed until I understand its fundamental nature. Alright, let's start digging! I should know this, what file is it in? I need to find its origin.

no matches

{
  "Expression": "config IWLWIFI_MVM",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 36364
							output: 38
							thoughts: 16
						

Here's a summary of my thought process, as requested:

**Diving into the Intel Wireless Driver Configuration**

Okay, so I need to get a handle on the configuration options for the Intel wireless drivers. My immediate thought is to start with the Kconfig file for that specific area, which, if memory serves, should be located in `drivers/net/wireless/intel/Kconfig`. That's the go-to place for understanding the configurable features and dependencies. I expect to find definitions of the various driver options, along with their default settings, help text explaining their purpose, and, crucially, any dependencies on other kernel features or hardware. This file is the backbone for configuring the Intel wireless support, and a good understanding of it will be critical for any modifications or deeper understanding of the driver's behavior. Time to delve in.

no matches

{
  "Expression": "config IWLWIFI_MVM",
  "PathPrefix": "drivers/net/wireless/intel/Kconfig"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 36606
							output: 36
							thoughts: 9
						

Okay, here's the summary, assuming I'm the expert thinking through this:

**Initial Impression: Exploring Possible Acronyms**

Hmm, thinking this through...I'm mentally running through potential acronyms here. That initial string, `IWLMVM`, it's not immediately obvious what it represents. I need to start deconstructing it. Is there some specific field or context where this would make sense? What are the key elements it might refer to? Perhaps it's an obscure method, a research project's internal name, or maybe something very industry-specific... Right now, my mind is exploring the possibilities. Let's see if the letters start to click in any familiar combinations. Perhaps it's a new or obscure term that I need to look into?

{
  "Expression": "config IWLMVM",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/Kconfig=66=config IWLDVM\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-73-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:74:config IWLMVM\ndrivers/net/wireless/intel/iwlwifi/Kconfig-75-\ttristate \"Intel Wireless WiFi MVM Firmware support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 36925
							output: 35
							thoughts: 84
						

**Analyzing the `IWLMVM` Dependency**

Okay, so I'm digging into this firmware support. Right, so `IWLMVM` - that seems like the key configuration define for the MVM firmware. It's pretty straightforward, actually, given that I know my way around the kernel codebase. I'm seeing that `iwl_mvm_load_ucode_wait_alive` function resides within `mvm/fw.c`.  That strongly suggests that `IWLMVM` is a hard requirement for the whole process. I want to double-check my understanding though, so the next step is to head over to the `drivers/net/wireless/intel/iwlwifi/Makefile`. It should give me the compilation rules and dependencies for anything that lives within that `fw/` directory. That's where the proof is!

{
  "Expression": "fw/",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/Makefile"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/Makefile=32=iwlwifi-objs\t\t+= iwl-trans.o\ndrivers/net/wireless/intel/iwlwifi/Makefile-33-\ndrivers/net/wireless/intel/iwlwifi/Makefile:34:iwlwifi-objs\t\t+= fw/img.o fw/notif-wait.o fw/rs.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:35:iwlwifi-objs\t\t+= fw/dbg.o fw/dbg-old.o fw/pnvm.o fw/dump.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:36:iwlwifi-objs\t\t+= fw/regulatory.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:37:iwlwifi-$(CONFIG_IWLMVM) += fw/paging.o fw/smem.o fw/init.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:38:iwlwifi-$(CONFIG_IWLMLD) += fw/smem.o fw/init.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:39:iwlwifi-$(CONFIG_ACPI) += fw/acpi.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:40:iwlwifi-$(CONFIG_EFI)\t+= fw/uefi.o\ndrivers/net/wireless/intel/iwlwifi/Makefile:41:iwlwifi-$(CONFIG_IWLWIFI_DEBUGFS) += fw/debugfs.o\ndrivers/net/wireless/intel/iwlwifi/Makefile-42-\n"
}

gemini-3.1-pro-preview

null

null

							input: 37621
							output: 39
							thoughts: 305
						

**My Analysis of the iwlwifi Driver Configuration for Fuzzing**

Okay, so here's the breakdown of how to approach fuzzing this iwlwifi driver vulnerability. I've traced the dependencies and the necessary configurations. It seems `fw/uefi.o` is compiled directly into `iwlwifi.ko` when the `CONFIG_EFI` option is enabled, and `iwlwifi.ko` itself is built when `CONFIG_IWLWIFI` is enabled. Importantly, `fw/pnvm.o` also ends up included within `iwlwifi-objs`. That means having both `CONFIG_IWLWIFI` and `CONFIG_EFI` active should be enough to get the core code compiled in.

Now, to actually trigger the vulnerable code during driver initialization, I need to make sure the firmware loading and initialization sequence are exercised.  That's where the `CONFIG_IWLMVM` or `CONFIG_IWLMLD` options come into play.  To be on the safe side, and to maximize coverage, I should enable both of these.  They're key to initializing the driver in a way that makes it vulnerable.

So, to summarize for fuzzing purposes:

*   **WorthFuzzing:** Absolutely. The patch fixes a definite out-of-bounds read vulnerability when parsing UEFI variables related to reduced power settings within the iwlwifi driver. This code is reachable during the driver's initialization sequence, under the right UEFI variable conditions.
*   **Reasoning:** The bug is within the iwlwifi driver, triggered by parsing UEFI variables.
*   **Focus Symbols:** I need to focus on these functions: `iwl_uefi_reduce_power_parse`, `iwl_pnvm_load_reduce_power_to_trans`, and `iwl_uefi_get_reduced_power`. Those are where the vulnerabilities are.
*   **EnableConfigs:** Here's the critical set of configs I need to enable:
    *   `IWLWIFI`
    *   `EFI`
    *   `IWLMVM`
    *   `IWLMLD`

I need to make sure that `IWLMLD` is a valid option in the configuration; it is possible that it is just a default, so it needs to be checked.

{
  "Expression": "config IWLMLD",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/Kconfig"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/Kconfig=74=config IWLMVM\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-83-\ndrivers/net/wireless/intel/iwlwifi/Kconfig:84:config IWLMLD\ndrivers/net/wireless/intel/iwlwifi/Kconfig-85-\ttristate \"Intel Wireless WiFi MLD Firmware support\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 38575
							output: 36
							thoughts: 33
						

**Validating and Analyzing Dependencies**

Okay, so I've confirmed that `IWLMLD` is indeed a valid identifier. That's a good starting point. Now, my next step is to investigate the potential dependencies of `IWLWIFI`. My experience tells me that it's highly probable that `IWLWIFI` relies on `MAC80211`. I need to confirm this relationship, as understanding these dependencies is crucial for any changes or integration work related to these identifiers. That's where I will begin.

{
  "Expression": "depends on",
  "PathPrefix": "drivers/net/wireless/intel/iwlwifi/Kconfig"
}

{
  "Output": "drivers/net/wireless/intel/iwlwifi/Kconfig=2=config IWLWIFI\ndrivers/net/wireless/intel/iwlwifi/Kconfig-3-\ttristate \"Intel Wireless WiFi Next Gen AGN - Wireless-N/Advanced-N/Ultimate-N (iwlwifi) \"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:4:\tdepends on PCI \u0026\u0026 HAS_IOMEM \u0026\u0026 CFG80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig:5:\tdepends on IWLMEI || !IWLMEI\ndrivers/net/wireless/intel/iwlwifi/Kconfig-6-\tselect FW_LOADER\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=49=config IWLWIFI_KUNIT_TESTS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-50-\ttristate\ndrivers/net/wireless/intel/iwlwifi/Kconfig:51:\tdepends on KUNIT\ndrivers/net/wireless/intel/iwlwifi/Kconfig-52-\tdefault KUNIT_ALL_TESTS\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=58=config IWLWIFI_LEDS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-59-\tbool\ndrivers/net/wireless/intel/iwlwifi/Kconfig:60:\tdepends on LEDS_CLASS=y || LEDS_CLASS=MAC80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig:61:\tdepends on IWLMVM || IWLDVM\ndrivers/net/wireless/intel/iwlwifi/Kconfig-62-\tselect LEDS_TRIGGERS\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=66=config IWLDVM\ndrivers/net/wireless/intel/iwlwifi/Kconfig-67-\ttristate \"Intel Wireless WiFi DVM Firmware support\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:68:\tdepends on MAC80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig-69-\thelp\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=74=config IWLMVM\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-76-\tselect WANT_DEV_COREDUMP\ndrivers/net/wireless/intel/iwlwifi/Kconfig:77:\tdepends on MAC80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig:78:\tdepends on PTP_1588_CLOCK_OPTIONAL\ndrivers/net/wireless/intel/iwlwifi/Kconfig-79-\thelp\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=84=config IWLMLD\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig-86-\tselect WANT_DEV_COREDUMP\ndrivers/net/wireless/intel/iwlwifi/Kconfig:87:\tdepends on MAC80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig:88:\tdepends on PTP_1588_CLOCK_OPTIONAL\ndrivers/net/wireless/intel/iwlwifi/Kconfig-89-\thelp\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=102=comment \"WARNING: iwlwifi is useless without IWLDVM or IWLMVM or IWLMLD\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:103:\tdepends on IWLDVM=n \u0026\u0026 IWLMVM=n \u0026\u0026 IWLMLD=n\ndrivers/net/wireless/intel/iwlwifi/Kconfig-104-\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=131=config IWLWIFI_DEBUGFS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-132-\tbool \"iwlwifi debugfs support\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:133:\tdepends on MAC80211_DEBUGFS\ndrivers/net/wireless/intel/iwlwifi/Kconfig-134-\thelp\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=139=config IWLWIFI_DEVICE_TRACING\ndrivers/net/wireless/intel/iwlwifi/Kconfig-140-\tbool \"iwlwifi device access tracing\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:141:\tdepends on EVENT_TRACING\ndrivers/net/wireless/intel/iwlwifi/Kconfig-142-\tdefault y\n--\ndrivers/net/wireless/intel/iwlwifi/Kconfig=160=config IWLMEI\ndrivers/net/wireless/intel/iwlwifi/Kconfig-161-\ttristate \"Intel Management Engine communication over WLAN\"\ndrivers/net/wireless/intel/iwlwifi/Kconfig:162:\tdepends on INTEL_MEI\ndrivers/net/wireless/intel/iwlwifi/Kconfig:163:\tdepends on PM\ndrivers/net/wireless/intel/iwlwifi/Kconfig:164:\tdepends on CFG80211\ndrivers/net/wireless/intel/iwlwifi/Kconfig:165:\tdepends on BROKEN\ndrivers/net/wireless/intel/iwlwifi/Kconfig-166-\thelp\n"
}

gemini-3.1-pro-preview

null

null

							input: 40085
							output: 138
							thoughts: 179
						

**My Fuzzing Strategy for Intel Wireless Drivers**

Okay, so I'm mapping out the dependencies here for the Intel wireless drivers, figuring out which components are key for fuzzing. `IWLWIFI` relies on `PCI`, `HAS_IOMEM`, and `CFG80211`, so that's a good starting point. Then, `IWLMVM` and `IWLMLD` both depend on `MAC80211`. I'll focus on `IWLWIFI`, `EFI`, `IWLMVM`, and `IWLMLD` as my primary targets for now.

Now, let's drill down and identify specific functions that are likely to be vulnerable. After checking the FocusSymbols, I see that `iwl_uefi_reduce_power_parse` is the function that was modified – that's definitely interesting. `iwl_pnvm_load_reduce_power_to_trans` calls that one, and `iwl_uefi_get_reduced_power` is responsible for reading the UEFI variable. All of these functions look like prime candidates for fuzzing. They handle interactions with UEFI and likely involve some critical data parsing. I'm going to start with these.

Alright, time to set the results and move on to the next phase.

{
  "EnableConfigs": [
    "IWLWIFI",
    "EFI",
    "IWLMVM",
    "IWLMLD"
  ],
  "FocusSymbols": [
    "iwl_uefi_reduce_power_parse",
    "iwl_pnvm_load_reduce_power_to_trans",
    "iwl_uefi_get_reduced_power"
  ],
  "Reasoning": "The patch fixes an out-of-bounds read when parsing UEFI variables for reduced power settings in the iwlwifi driver. The code is reachable during driver initialization when specific UEFI variables are present.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "IWLWIFI",
    "EFI",
    "IWLMVM",
    "IWLMLD"
  ],
  "FocusSymbols": [
    "iwl_uefi_reduce_power_parse",
    "iwl_pnvm_load_reduce_power_to_trans",
    "iwl_uefi_get_reduced_power"
  ],
  "Reasoning": "The patch fixes an out-of-bounds read when parsing UEFI variables for reduced power settings in the iwlwifi driver. The code is reachable during driver initialization when specific UEFI variables are present.",
  "WorthFuzzing": true
}