| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/06/30 09:12 | flow | patch-triage |
3mArgs:null Results: {
"EnableConfigs": [
"IWLWIFI",
"EFI",
"IWLMVM"
],
"FocusSymbols": [
"iwl_uefi_reduce_power_parse",
"iwl_pnvm_load_reduce_power_to_trans"
],
"Reasoning": "The patch fixes an out-of-bounds read in the iwlwifi driver when parsing the PNVM SKU TLV from a UEFI variable. The code is reachable during driver initialization if specific EFI variables are present, which can be fuzzed.",
"WorthFuzzing": true
} |
| 1/1 | 2026/06/30 09:12 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 6e1dd6ac58064029d856efb76a897ecd6a856351\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Jun 30 09:12:08 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..747df658dc7e84 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 3 * sizeof(__le32)) {\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"
} |
| 2/1 | 2026/06/30 09:12 | agent | patch-evaluator |
3mModel:gemini-3.1-pro-preview Args: null Results: {
"EnableConfigs": [
"IWLWIFI",
"EFI",
"IWLMVM"
],
"FocusSymbols": [
"iwl_uefi_reduce_power_parse",
"iwl_pnvm_load_reduce_power_to_trans"
],
"Reasoning": "The patch fixes an out-of-bounds read in the iwlwifi driver when parsing the PNVM SKU TLV from a UEFI variable. The code is reachable during driver initialization if specific EFI variables are present, which can be fuzzed.",
"WorthFuzzing": true
}Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). 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. Prompt: For your convenience, here is the diff of the changes:
commit 6e1dd6ac58064029d856efb76a897ecd6a856351
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Jun 30 09:12:08 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..747df658dc7e84 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 < 3 * sizeof(__le32)) {
+ 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]),
|
| 3/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 1977 output: 49 thoughts: 82 Thoughts: **Analyzing the Intel Wireless Firmware Patch** Okay, so there's a patch floating around, and it's landed in `drivers/net/wireless/intel/iwlwifi/fw/uefi.c`. Specifically, it's addressing the `iwl_uefi_reduce_power_parse` function and adding a length check for `IWL_UCODE_TLV_PNVM_SKU`. Right, that makes sense. I need to dig into this. I'll need to refresh my memory on what `iwl_uefi_reduce_power_parse` is actually *doing*. Let's go ahead and examine that function in detail. This length check probably addresses a potential buffer overflow or other vulnerability related to how the firmware handles this particular TLV. Got to make sure the patch addresses a real issue and that the solution is robust and doesn't introduce any regressions or side effects. Time to get to work! |
| 4/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_reduce_power_parse",
"PathPrefix": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c"
}Results: {
"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"
} |
| 5/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2471 output: 47 thoughts: 17 Thoughts: Okay, let's dive into `iwl_uefi_reduce_power_parse`. I need to understand this function. Given my expertise, I'm expecting this is probably related to the Intel wireless driver, likely dealing with power management specifically within a UEFI environment. The naming convention is pretty clear; "reduce_power" suggests it's about optimizing power consumption. The "parse" part likely means it's interpreting some data or configuration related to power reduction. I'm guessing it's handling settings related to radio power-down, clock gating, or perhaps power-saving modes during the UEFI phase, given that "UEFI" is in the name. I'll need to look closely at what inputs it takes, what data structures it manipulates, and, critically, where it's called from and what its return values are. That will paint a clearer picture of its role in the larger power management picture within this driver and potentially within the system's overall power profile during the early boot stages. I'm already anticipating needing to assess how this interacts with the ACPI tables and other power management firmware interfaces. Let's get reading and confirm these initial hypotheses. |
| 6/2 | 2026/06/30 09:12 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
"FirstLine": 219,
"LineCount": 100
}Results: {
"Contents": " 219:\t\n 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 3 * sizeof(__le32)) {\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"
} |
| 7/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 4396 output: 31 thoughts: 65 Thoughts: **Analyzing the UEFI Parsing Code** Okay, so I'm looking at this patch and it seems like it's adding a length check for `IWL_UCODE_TLV_PNVM_SKU` within the `iwl_uefi_reduce_power_parse` function. Right, that function, if I recall correctly, is responsible for parsing UEFI variables. I know I've worked with UEFI variable parsing before, so it's good to see this level of detail being added. My immediate thought is, let's trace this back. Where exactly is `iwl_uefi_reduce_power_parse` being called from? Understanding the call stack is crucial to assessing the impact of this change and why that specific TLV is important in this context. I'll need to identify the calling functions to fully grasp the ramifications of this added check. |
| 8/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_reduce_power_parse",
"PathPrefix": ""
}Results: {
"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"
} |
| 9/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5241 output: 35 thoughts: 57 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience: **Analyzing Power Reduction in Intel Wireless Firmware** Alright, so I'm digging into this `iwl_pnvm_load_reduce_power_to_trans` function. It looks like its main purpose is to handle power reduction during a transition. The immediate point of interest is the call to `iwl_uefi_reduce_power_parse` within it. That suggests there's some UEFI interaction or interpretation involved in determining *how* the power reduction is performed. I'll need to understand the relationship between those two functions: `iwl_pnvm_load_reduce_power_to_trans` and `iwl_uefi_reduce_power_parse`. My first step is to trace the call graph for `iwl_pnvm_load_reduce_power_to_trans`. I want to understand what triggers this power reduction logic. What states or events lead to its execution? Knowing the caller(s) will tell me the context in which this function is invoked and give me a broader understanding of its purpose within the overall power management scheme. I'm going to start with a cross-reference search to determine where `iwl_pnvm_load_reduce_power_to_trans` is actually called. |
| 10/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_pnvm_load_reduce_power_to_trans",
"PathPrefix": ""
}Results: {
"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"
} |
| 11/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5912 output: 27 thoughts: 45 Thoughts: Here's my take on the thought process, summarized as you requested: **Deconstructing iwl_pnvm_load** Okay, so `iwl_pnvm_load` is invoking `iwl_pnvm_load_reduce_power_to_trans`. I need to understand the control flow here, and what drives the call to this specific function. To truly grasp the implications, I need to trace back from this point. My next step is clear – I have to figure out the calling context of `iwl_pnvm_load`. Where does it originate within the broader driver structure? Only then can I form a comprehensive understanding of its role. This is the starting point for really digging into this piece of the code. |
| 12/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_pnvm_load",
"PathPrefix": ""
}Results: {
"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"
} |
| 13/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7141 output: 31 thoughts: 174 Thoughts: **Analyzing the iwlwifi Driver and Potential Vulnerabilities** Okay, so I'm looking at this `iwl_pnvm_load` function and how it's integrated within the iwlwifi driver initialization sequence. Specifically, I see it's called from both `iwl_mvm_load_ucode_wait_alive` and `iwl_mld_run_fw_init_sequence`. These are critical parts of the driver's setup, which always makes me pay more attention. This patch caught my eye because it introduces a new length check – `tlv_len < 3 * sizeof(__le32)` – when handling `IWL_UCODE_TLV_PNVM_SKU`. I immediately recognize that this involves parsing UEFI variables. This is where things get interesting. UEFI variables are essentially firmware/BIOS provided data, and that raises a flag: are these variables potentially fuzzable? In the context of kernel security, that's a key question. My understanding is that, by default, syzkaller doesn't offer a direct way to fuzz UEFI variables unless there is a dedicated interface available or it's reading from a file. However, it's worth checking to see if there is any other interface to interact with this particular piece of UEFI data. I should investigate the `iwl_uefi_get_reduced_power` function to see if it provides any clues. |
| 14/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_get_reduced_power",
"PathPrefix": ""
}Results: {
"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-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/uefi.c=220=int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\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.h=324=void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len);\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,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h=369=static inline u8 *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:370:iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-371-{\n"
} |
| 15/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 8215 output: 31 thoughts: 17 Thoughts: Okay, here's my attempt at summarizing that thought process, keeping in mind I'm speaking to a fellow expert: **Diving into `iwl_uefi_get_verified_variable`** Alright, time to get started. Let's start by zeroing in on `iwl_uefi_get_verified_variable`. That name alone tells me this is likely related to the interaction with UEFI firmware, specifically dealing with retrieving verified variables. I need to understand how this function operates. Is it retrieving security settings? Perhaps it's checking the integrity of a boot variable? Knowing what it's *verifying* is critical to understanding its role. What are the dependencies? I'll probably need to understand how the iwl (likely Intel Wireless LAN) driver is interacting with the UEFI services. I'll need to remember to look at related functions. Hopefully the code is well-documented. Otherwise I will be spending a lot of time reverse engineering. |
| 16/2 | 2026/06/30 09:12 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_get_verified_variable",
"PathPrefix": ""
}Results: {
"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"
} |
| 17/2 | 2026/06/30 09:12 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11923 output: 45 thoughts: 19 Thoughts: Okay, let's dive into this `iwl_uefi_get_verified_variable_guid` function. My initial thought is to immediately understand its purpose within the broader context. What is it verifying? What type of variable is it dealing with? The name clearly suggests interaction with UEFI variables, likely within an Intel Wireless LAN (iwl) context. So, I need to immediately consider the implications of this function's operation on the security and integrity of the system's UEFI environment. Is it getting a variable, or the GUID? I'm starting to think about potential vulnerabilities here. If this is used for some kind of verification, what's the access control mechanism? What happens if the verification fails? Does it leak information, allow exploitation, or cause a denial of service? The "verified" part is key. What are the verification steps? I need to understand the threat model here to determine the depth of my interest. I need to know the risks. |
| 18/2 | 2026/06/30 09:13 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
"FirstLine": 82,
"LineCount": 40
}Results: {
"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"
} |
| 19/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12760 output: 29 thoughts: 15 Thoughts: Okay, let's dive into this. Here's my take on those thoughts, as if they're my own: **Analyzing `iwl_uefi_get_variable`** Right, `iwl_uefi_get_variable`... let's take a look at what we're dealing with. Knowing the context, I immediately assume this is probably related to the Intel Wireless driver and its interaction with the UEFI firmware. I'm guessing this function is responsible for retrieving a specific UEFI variable, likely something related to the wireless adapter's configuration or status, perhaps even security-related settings. It's probably part of a larger mechanism to interface with the firmware and get essential information. I wonder if it includes error handling. I'll need to know whether the wireless adapter is attempting to determine its operational status by accessing UEFI variables. Are we determining whether Secure Boot is enabled, for example? Or are we accessing driver specific configurations? The devil, as always, is in the details, so I'll need to dig deeper into the surrounding code to understand the specific variables it's fetching, and why. |
| 20/2 | 2026/06/30 09:13 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_get_variable",
"PathPrefix": ""
}Results: {
"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"
} |
| 21/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13512 output: 45 thoughts: 15 Thoughts: Okay, let's dive into `iwl_uefi_get_variable`. I want to understand exactly how this function retrieves UEFI variables. Given my expertise, I know the nuances of UEFI, so I'm focusing on the implementation details and looking for any potential optimizations or areas of concern. I'll pay close attention to the error handling, the size calculations, and the interaction with the UEFI runtime services. I'll mentally compare this implementation to other UEFI variable retrieval methods I've seen, considering different hardware architectures and firmware designs. I'll also be thinking about any possible security implications, such as potential vulnerabilities to buffer overflows or incorrect permissions checks. Specifically, I'm going to look for areas where the code might inadvertently expose sensitive data or allow for unexpected modifications of the UEFI variable store. I'll also check if the function handles NULL or invalid input properly and consider the potential impact of different error codes. |
| 22/2 | 2026/06/30 09:13 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.c",
"FirstLine": 29,
"LineCount": 30
}Results: {
"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"
} |
| 23/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 14192 output: 25 thoughts: 398 Thoughts: **Fuzzing the iwlwifi Driver via EFI Variables** Okay, so `iwl_uefi_get_variable` ultimately calls `efi.get_variable`. Can we fuzz `efi.get_variable` through this driver? Syzkaller doesn't typically directly target UEFI variables unless there's a convenient interface like an ioctl or sysfs entry or if we're in a VM with direct control, but that's not its usual mode of operation. Hold on... doesn't syzkaller have some support via `efivarfs`? No, that just provides write access. Ah, but that's the key! If syzkaller *can* write to `efivarfs`, it can create arbitrary EFI variables, and *then* the driver will read them. The next question: Is `efivarfs` writable by root? Yes, it is. Perfect. That means syzkaller can write to `/sys/firmware/efi/efivars/...` and effectively construct inputs for the driver. Now, when does the driver read the variable? `iwl_pnvm_load` is called during initialization. Can syzkaller trigger driver initialization *after* writing the EFI variables? Yes, by unbinding and binding the driver, or by using hotplugging mechanisms for the device, like `vhci`, `mac80211_hwsim`, or even PCI hotplug. Wait, iwlwifi is a PCI driver! And syzkaller has a PCI fuzzer that can emulate PCI devices. If the `iwlwifi` driver is enabled, syzkaller *could* fuzz it. I need to check if the `iwlwifi` is actually enabled in the syzkaller configs. Syzkaller generally tests a lot of drivers, so it's a good bet. Let's verify by checking `CONFIG_IWLWIFI` is enabled. |
| 24/2 | 2026/06/30 09:13 | tool | grepper |
0mArgs:{
"Expression": "config IWLWIFI",
"PathPrefix": ""
}Results: {
"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"
} |
| 25/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15687 output: 39 thoughts: 222 Thoughts: **Analyzing a Network Driver Bug Fix**
Okay, so this patch is introducing a length check in the iwlwifi driver, specifically this snippet:
```c
if (tlv_len < 3 * sizeof(__le32)) {
IWL_ERR(trans, "invalid PNVM SKU TLV len: %u\n",
tlv_len);
return -EINVAL;
}
```
Right, it looks like it's preventing an out-of-bounds read when it tries to access elements `tlv_sku_id->data[0]`, `[1]`, and `[2]`. Good catch. And look, the commit author is listed as `syz-cluster <triage@syzkaller.com>`. Wait a minute... that means syzbot found this! Syzkaller! That's excellent news. If syzbot can trigger this, that immediately tells me this code *is* reachable, and that it's prime for further fuzzing. This is definitely worth pursuing.
Now, let's figure out the necessary configuration options. Clearly, `CONFIG_IWLWIFI` is the main one, as it's the Intel wireless driver, but are there any specific sub-options we need to enable to expose this vulnerability? Let's check the `drivers/net/wireless/intel/iwlwifi/Makefile` to see if there are any other relevant config flags we need to take into consideration.
|
| 26/2 | 2026/06/30 09:13 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/intel/iwlwifi/Makefile",
"FirstLine": 1,
"LineCount": 40
}Results: {
"Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0\n 2:\t# common\n 3:\tobj-$(CONFIG_IWLWIFI)\t+= iwlwifi.o\n 4:\tiwlwifi-objs\t\t+= iwl-io.o\n 5:\tiwlwifi-objs\t\t+= iwl-drv.o\n 6:\tiwlwifi-objs\t\t+= iwl-debug.o\n 7:\tiwlwifi-objs\t\t+= iwl-nvm-utils.o\n 8:\tiwlwifi-objs\t\t+= iwl-utils.o\n 9:\tiwlwifi-objs\t\t+= iwl-phy-db.o iwl-nvm-parse.o\n 10:\t\n 11:\t# Bus\n 12:\tiwlwifi-objs\t\t+= pcie/ctxt-info.o pcie/ctxt-info-v2.o pcie/drv.o pcie/utils.o\n 13:\tiwlwifi-objs\t\t+= pcie/gen1_2/rx.o pcie/gen1_2/tx.o pcie/gen1_2/trans.o\n 14:\tiwlwifi-objs\t\t+= pcie/gen1_2/trans-gen2.o pcie/gen1_2/tx-gen2.o\n 15:\t\n 16:\tCFLAGS_pcie/drv.o += -Wno-override-init\n 17:\t\n 18:\t# combined MAC/RF configurations\n 19:\tiwlwifi-$(CONFIG_IWLDVM) += cfg/1000.o cfg/2000.o\n 20:\tiwlwifi-$(CONFIG_IWLDVM) += cfg/5000.o cfg/6000.o\n 21:\tiwlwifi-$(CONFIG_IWLMVM) += cfg/7000.o cfg/8000.o\n 22:\t# MAC configurations\n 23:\tiwlwifi-$(CONFIG_IWLMVM) += cfg/9000.o cfg/22000.o\n 24:\tiwlwifi-$(CONFIG_IWLMVM) += cfg/ax210.o\n 25:\tiwlwifi-$(CONFIG_IWLMVM) += cfg/bz.o cfg/sc.o\n 26:\tiwlwifi-$(CONFIG_IWLMLD) += cfg/bz.o cfg/sc.o cfg/dr.o\n 27:\t# RF configurations\n 28:\tiwlwifi-$(CONFIG_IWLMVM) += cfg/rf-jf.o cfg/rf-hr.o cfg/rf-gf.o\n 29:\tiwlwifi-$(CONFIG_IWLMLD) += cfg/rf-fm.o cfg/rf-wh.o cfg/rf-pe.o\n 30:\t\n 31:\tiwlwifi-objs\t\t+= iwl-dbg-tlv.o\n 32:\tiwlwifi-objs\t\t+= iwl-trans.o\n 33:\t\n 34:\tiwlwifi-objs\t\t+= fw/img.o fw/notif-wait.o fw/rs.o\n 35:\tiwlwifi-objs\t\t+= fw/dbg.o fw/dbg-old.o fw/pnvm.o fw/dump.o\n 36:\tiwlwifi-objs\t\t+= fw/regulatory.o\n 37:\tiwlwifi-$(CONFIG_IWLMVM) += fw/paging.o fw/smem.o fw/init.o\n 38:\tiwlwifi-$(CONFIG_IWLMLD) += fw/smem.o fw/init.o\n 39:\tiwlwifi-$(CONFIG_ACPI) += fw/acpi.o\n 40:\tiwlwifi-$(CONFIG_EFI)\t+= fw/uefi.o\n"
} |
| 27/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 17209 output: 46 thoughts: 227 Thoughts: **Analyzing the iwlwifi Driver's UEFI Integration** Okay, so I'm looking at this `iwlwifi` driver build configuration, specifically how UEFI is handled. It seems pretty straightforward: `iwlwifi-$(CONFIG_EFI) += fw/uefi.o`. This tells me that the `fw/uefi.c` file *requires* `CONFIG_EFI` to be compiled into the driver. Makes sense. Naturally, `CONFIG_IWLWIFI` is a prerequisite for the driver's inclusion. Now, I need to check for other potentially relevant configurations. Let's see... I remember that `iwl_uefi_reduce_power_parse` is defined in `fw/uefi.c`. Therefore, the essential configuration are definitely `IWLWIFI` and `EFI`. Hold on... I'm reminded that `iwl_pnvm_load` is in `fw/pnvm.c`. Let me quickly look at the Makefile for that file, just to be sure... Ah, yes: `iwlwifi-objs += fw/pnvm.o`. So, that means `fw/pnvm.c` is always compiled if `IWLWIFI` is enabled, which is to be expected. Crucially, though, `fw/uefi.c` only gets built if `CONFIG_EFI` is set. Okay, just to double-check my understanding, I need to look at `fw/uefi.h` to see how things are structured when `CONFIG_EFI` *isn't* enabled. I need to understand what falls out when this is disabled. |
| 28/2 | 2026/06/30 09:13 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/intel/iwlwifi/fw/uefi.h",
"FirstLine": 350,
"LineCount": 50
}Results: {
"Contents": " 350:\t\t\t\t struct iwl_fw_runtime *fwrt);\n 351:\tint iwl_uefi_get_puncturing(struct iwl_fw_runtime *fwrt);\n 352:\tint iwl_uefi_get_dsbr(struct iwl_fw_runtime *fwrt, u32 *value);\n 353:\tint iwl_uefi_get_phy_filters(struct iwl_fw_runtime *fwrt);\n 354:\t#else /* CONFIG_EFI */\n 355:\tstatic inline void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)\n 356:\t{\n 357:\t\treturn ERR_PTR(-EOPNOTSUPP);\n 358:\t}\n 359:\t\n 360:\tstatic inline int\n 361:\tiwl_uefi_reduce_power_parse(struct iwl_trans *trans,\n 362:\t\t\t\t const u8 *data, size_t len,\n 363:\t\t\t\t struct iwl_pnvm_image *pnvm_data,\n 364:\t\t\t\t __le32 sku_id[3])\n 365:\t{\n 366:\t\treturn -EOPNOTSUPP;\n 367:\t}\n 368:\t\n 369:\tstatic inline u8 *\n 370:\tiwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\n 371:\t{\n 372:\t\treturn ERR_PTR(-EOPNOTSUPP);\n 373:\t}\n 374:\t\n 375:\tstatic inline void iwl_uefi_get_step_table(struct iwl_trans *trans)\n 376:\t{\n 377:\t}\n 378:\t\n 379:\tstatic inline int\n 380:\tiwl_uefi_handle_tlv_mem_desc(struct iwl_trans *trans, const u8 *data,\n 381:\t\t\t\t u32 tlv_len, struct iwl_pnvm_image *pnvm_data)\n 382:\t{\n 383:\t\treturn 0;\n 384:\t}\n 385:\t\n 386:\tstatic inline int iwl_uefi_get_wrds_table(struct iwl_fw_runtime *fwrt)\n 387:\t{\n 388:\t\treturn -ENOENT;\n 389:\t}\n 390:\t\n 391:\tstatic inline int iwl_uefi_get_ewrd_table(struct iwl_fw_runtime *fwrt)\n 392:\t{\n 393:\t\treturn -ENOENT;\n 394:\t}\n 395:\t\n 396:\tstatic inline int iwl_uefi_get_wgds_table(struct iwl_fw_runtime *fwrt)\n 397:\t{\n 398:\t\treturn -ENOENT;\n 399:\t}\n"
} |
| 29/2 | 2026/06/30 09:13 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18633 output: 24 thoughts: 392 Thoughts: **Analyzing the Dependency Chain** Okay, so `iwl_uefi_reduce_power_parse` is conditionally compiled, but it's clearly stubbed out unless `CONFIG_EFI` is enabled. That's the first dependency, definitely. And given it lives within the `iwlwifi` tree, `CONFIG_IWLWIFI` is another no-brainer. Let's dive deeper and see what else is tied into this. The patch is touching `drivers/net/wireless/intel/iwlwifi/fw/uefi.c`. The function `iwl_uefi_reduce_power_parse` is called by `iwl_pnvm_load_reduce_power_to_trans`, which, in turn, is called by `iwl_pnvm_load`. Now we're getting somewhere. `iwl_pnvm_load` is called from `iwl_mvm_load_ucode_wait_alive` *and* `iwl_mld_run_fw_init_sequence`. Looking at the code, `iwl_mvm_load_ucode_wait_alive` resides in `mvm/fw.c`, which tells me this branch is dependent on `CONFIG_IWLMVM`. And the other one, `iwl_mld_run_fw_init_sequence`, is in `mld/fw.c` which, naturally, points to `CONFIG_IWLMLD`. Time to double-check the Makefile. Ah, yes: `iwlwifi-$(CONFIG_IWLMVM) += mvm/` and `iwlwifi-$(CONFIG_IWLMLD) += mld/`. Hold on... `iwl_pnvm_load` is actually in `fw/pnvm.c`, which seems to be compiled unconditionally, so the path is still there even without either `IWLMVM` or `IWLMLD`. But the call chain *requires* at least one of them to reach it. It seems I need to clarify what the *Kconfig* files for `IWLMVM` and `IWLMLD` say to get the full picture. |
| 30/2 | 2026/06/30 09:14 | tool | grepper |
0mArgs:{
"Expression": "config IWLMVM",
"PathPrefix": ""
}Results: {
"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"
} |
| 31/2 | 2026/06/30 09:14 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 19625 output: 25 thoughts: 10 Thoughts: Okay, here's my attempt at summarizing the thought process, tailored for an expert audience, and written in the first person: **Initial Assessment and Verification** Alright, the instruction mentions `IWLMLD`. Immediately, my mind jumps to a mental checklist. Is this a code? An acronym? A file or dataset identifier? Given the context, I'm assuming it's likely a technical designation, perhaps a variable name, a model identifier, or something similar within a specific project or domain. My first instinct is to verify the context; what is the domain? What is the project? I need to check its origin to determine its relevance. Is this something I should recognize, or is it new? I need to perform a quick review of associated documentation or metadata. I'll need to confirm that this is a valid designation for a procedure, a dataset, or an item. Perhaps I need to check the project's codebase, documentation, or relevant internal tools if any are available. I'll search existing indices or databases for any matches or similar entries that I am aware of. It's a fundamental step; I can't proceed without that clarity. Let's make sure it's not a typo, too. |
| 32/2 | 2026/06/30 09:14 | tool | grepper |
0mArgs:{
"Expression": "config IWLMLD",
"PathPrefix": ""
}Results: {
"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"
} |
| 33/2 | 2026/06/30 09:14 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20027 output: 31 thoughts: 222 Thoughts: **My Analysis of the Driver Inclusion** Okay, so I'm looking at these sub-drivers: `IWLMVM` and `IWLMLD`. Thinking strategically, to make sure this is reachable, I need to include `IWLWIFI`, `EFI`, and probably `IWLMVM`. Hang on... `IWLMVM` is the workhorse here, the Mac80211 Virtual MAC that handles those newer Intel cards – the 7260 and up. I should double-check if `IWLMVM` is enabled by default or if it needs to be explicitly listed. Best to be safe, so I'll go with listing `IWLWIFI`, `IWLMVM`, and `EFI`. That should cover the crucial bases. Now, on to the heart of the matter – identifying the focus symbols. The patch targets `iwl_uefi_reduce_power_parse`. Yep, that's definitely a key player, so that's where my attention will be directed. I'll also be watching `iwl_pnvm_load_reduce_power_to_trans` and `iwl_pnvm_load`. Those are likely related. My first step is to dive into `iwl_uefi_reduce_power_parse` and see what it's all about. |
| 34/2 | 2026/06/30 09:14 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_reduce_power_parse",
"PathPrefix": ""
}Results: {
"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"
} |
| 35/2 | 2026/06/30 09:14 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21129 output: 35 thoughts: 41 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: **Analyzing Power Reduction in Intel Wireless Drivers** Okay, so I'm honing in on power management within the Intel wireless driver space, and it seems like `iwl_uefi_reduce_power_parse` is a pretty solid entry point for investigation. It likely deals with initial power configuration parsing during UEFI boot, which is an interesting spot to start. Now, I need to expand my scope. `iwl_pnvm_load_reduce_power_to_trans` also looks promising. That name suggests we're getting into loading power settings from permanent non-volatile memory (PNVM) and transitioning those settings. I need to understand that transition process and how those settings interact with the initial parsing. Understanding how these two work together will definitely illuminate the bigger picture. Are these two functions related or do they feed into the same state machine? I need to dig deeper. |
| 36/2 | 2026/06/30 09:14 | tool | grepper |
0mArgs:{
"Expression": "iwl_pnvm_load_reduce_power_to_trans",
"PathPrefix": ""
}Results: {
"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"
} |
| 37/2 | 2026/06/30 09:14 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21704 output: 31 thoughts: 38 Thoughts: Okay, here's my take on those thoughts, framed as an expert's understanding: **Reflecting on Power Reduction Strategies** Right, so we're talking about power management. I'm seeing that `iwl_pnvm_load_reduce_power_to_trans` is a sound approach for handling power reduction during transmit operations. Makes sense. It's likely a targeted optimization within the PNVM (Persistent Non-Volatile Memory) loading process to specifically trim power consumption when transmitting data. Good implementation details there. And, I'm also thinking of how `iwl_uefi_get_reduced_power` fits into the broader picture. It's likely involved in retrieving or configuring reduced power settings within a UEFI (Unified Extensible Firmware Interface) environment, which likely provides a base-level platform power management strategy that complements the more application-specific details of the transmit power reduction. The combined effect of these power saving measures is important. |
| 38/2 | 2026/06/30 09:14 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_get_reduced_power",
"PathPrefix": ""
}Results: {
"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-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/uefi.c=220=int iwl_uefi_reduce_power_parse(struct iwl_trans *trans,\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.h=324=void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len);\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,\n--\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h=369=static inline u8 *\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h:370:iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)\ndrivers/net/wireless/intel/iwlwifi/fw/uefi.h-371-{\n"
} |
| 39/2 | 2026/06/30 09:14 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 22544 output: 29 thoughts: 15 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience and written in the first person: **Diving into `iwl_uefi_get_variable`** Alright, let's take a look at `iwl_uefi_get_variable`. I'm guessing this function is part of Intel's wireless driver, likely related to handling UEFI variables within the firmware, possibly for configuration or power management. My initial thought is to quickly assess its purpose and how it interacts with the broader system. I'll need to understand what it retrieves and from where – specifically, what UEFI variable store is it accessing? Is it dealing with NVRAM, or some other firmware-specific area? More importantly, I want to see if there are any obvious vulnerabilities or potential misuse in the implementation, particularly in handling the retrieved data. Are there any size limitations, buffer overflows, or type-confusion bugs that I can quickly identify? I need to check how error conditions are handled. Specifically, are the error codes handled properly, and are there any scenarios where unexpected values might lead to a security issue? I'll be looking for any signs of direct memory access, and if the access is proper and controlled. I'm especially interested in looking at the context in which it's called. Is it called in a privileged context, and if so, what's the control flow? What other functions does it call, and what are their behaviors? Also, is there any possibility of bypassing access control through this function? Ultimately, I want to quickly evaluate its safety and potential for exploitation within the overall system design. |
| 40/2 | 2026/06/30 09:15 | tool | grepper |
0mArgs:{
"Expression": "iwl_uefi_get_variable",
"PathPrefix": ""
}Results: {
"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"
} |
| 41/2 | 2026/06/30 09:15 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 23396 output: 128 thoughts: 474 Thoughts: **My Analysis of the `iwlwifi` Power Reduction Vulnerability** Okay, so I've zeroed in on `iwl_uefi_reduce_power_parse` and `iwl_pnvm_load_reduce_power_to_trans`. Those look like key focus symbols for fuzzing this particular bug. My initial thought is to enable configs `IWLWIFI`, `EFI`, and `IWLMVM`. Though, let me just double-check that list... yeah, it's just `IWLWIFI`, `EFI`, and `IWLMVM`. No other obvious configs are immediately apparent as relevant. Now, let me just confirm that `IWLWIFI` itself doesn't need any sneaky dependencies. Ah, it needs `PCI` and `MAC80211`, but syzkaller should already be set up with those, so we're good there. Thus, `IWLWIFI`, `EFI`, and `IWLMVM` is indeed sufficient. Next, I need to verify reachability. Can we actually get to `iwl_uefi_reduce_power_parse`? Right, it's reached if `iwl_uefi_get_reduced_power` returns valid data. And that, in turn, depends on `iwl_uefi_get_verified_variable` succeeding, which depends on `iwl_uefi_get_variable` succeeding. Finally, that hinges on `efi.get_variable` succeeding. Now, if syzkaller can mock EFI variables or write to efivarfs, we can definitely reach this code path. Considering this was found by syzbot, it's almost a given that it's reachable. Alright, let's summarize: **WorthFuzzing:** True **FocusSymbols:** * `iwl_uefi_reduce_power_parse` * `iwl_pnvm_load_reduce_power_to_trans` **EnableConfigs:** * `IWLWIFI` * `EFI` * `IWLMVM` **Reasoning:** The patch fixes an out-of-bounds read in the `iwlwifi` driver when parsing the PNVM SKU TLV from a UEFI variable. The vulnerable code is reached during driver initialization if certain EFI variables are available, and these variables are fuzzable. |
| 42/2 | 2026/06/30 09:15 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"IWLWIFI",
"EFI",
"IWLMVM"
],
"FocusSymbols": [
"iwl_uefi_reduce_power_parse",
"iwl_pnvm_load_reduce_power_to_trans"
],
"Reasoning": "The patch fixes an out-of-bounds read in the iwlwifi driver when parsing the PNVM SKU TLV from a UEFI variable. The code is reachable during driver initialization if specific EFI variables are present, which can be fuzzed.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"IWLWIFI",
"EFI",
"IWLMVM"
],
"FocusSymbols": [
"iwl_uefi_reduce_power_parse",
"iwl_pnvm_load_reduce_power_to_trans"
],
"Reasoning": "The patch fixes an out-of-bounds read in the iwlwifi driver when parsing the PNVM SKU TLV from a UEFI variable. The code is reachable during driver initialization if specific EFI variables are present, which can be fuzzed.",
"WorthFuzzing": true
} |
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| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
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