| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/11/03 00:49 | flow | patch-triage |
8mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The changes in this patch series modify SDIO bus-specific packet transmission functions: brcmf_sdiod_skbuff_write in the Broadcom brcmfmac SDIO driver and rsi_sdio_host_intf_write_pkt in the Redpine Signals 91x SDIO driver. Both drivers require physical vendor-specific SDIO wireless hardware that is not emulated in standard QEMU or GCE virtualized environments. Because there is no virtual bus or emulation interface to instantiate these SDIO devices, the modified code is structurally unreachable for syzkaller fuzzing.",
"WorthFuzzing": false
} |
| 1/1 | 2026/11/03 00:49 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 480a2c2be407e3932b490108707da73bcda93d79\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Nov 3 00:49:51 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c\nindex 71c2f99cdb7119..c6dd4148a44ce5 100644\n--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c\n+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c\n@@ -323,6 +323,9 @@ static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,\n \treq_sz = skb-\u003elen + 3;\n \treq_sz \u0026= (uint)~3;\n \n+\tif (req_sz \u003e skb-\u003elen)\n+\t\tmemset(skb-\u003edata + skb-\u003elen, 0, req_sz - skb-\u003elen);\n+\n \terr = sdio_memcpy_toio(func, addr, ((u8 *)(skb-\u003edata)), req_sz);\n \n \tif (err == -ENOMEDIUM)\ndiff --git a/drivers/net/wireless/rsi/rsi_91x_sdio.c b/drivers/net/wireless/rsi/rsi_91x_sdio.c\nindex bfa386b820d895..8bfb08306d03c2 100644\n--- a/drivers/net/wireless/rsi/rsi_91x_sdio.c\n+++ b/drivers/net/wireless/rsi/rsi_91x_sdio.c\n@@ -772,6 +772,9 @@ static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,\n \taddress = (num_blocks * block_size | (queueno \u003c\u003c 12));\n \tlength = num_blocks * block_size;\n \n+\tif (length \u003e len)\n+\t\tmemset((u8 *)pkt + len, 0, length - len);\n+\n \tstatus = rsi_sdio_write_register_multiple(adapter,\n \t\t\t\t\t\t address,\n \t\t\t\t\t\t (u8 *)pkt,\n"
} |
| 2/1 | 2026/11/03 00:49 | agent | patch-evaluator |
8mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The changes in this patch series modify SDIO bus-specific packet transmission functions: brcmf_sdiod_skbuff_write in the Broadcom brcmfmac SDIO driver and rsi_sdio_host_intf_write_pkt in the Redpine Signals 91x SDIO driver. Both drivers require physical vendor-specific SDIO wireless hardware that is not emulated in standard QEMU or GCE virtualized environments. Because there is no virtual bus or emulation interface to instantiate these SDIO devices, the modified code is structurally unreachable for syzkaller fuzzing.",
"WorthFuzzing": false
}Instruction: You are an expert Linux kernel maintainer and security engineer.
Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller.
IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on internal assumptions. You must actively use your code access
tools to inspect the actual source code, callers, and surrounding context.
================================================================================
1. CORE TRIAGE PHILOSOPHY
================================================================================
The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs,
and newly triggered assertions introduced by the patch series.
- REACHABILITY IS THE PRIMARY GATE:
Fuzzing can only discover bugs in code that can actually execute in standard virtualized
environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap).
If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed,
regardless of whether it adds assertions or complex logic.
- DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS:
Patch authors routinely label changes as "cleanups", "refactorings", or state
"No functional change intended". Do NOT take these claims at face value.
Code refactorings that rearrange logic, introduce helper functions, or alter state management
in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs.
If reachable executable code is modified or refactored, it MUST be fuzzed.
- NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED:
When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON*, VM_WARN_ON*,
BUG_ON*, lockdep_assert*) in reachable code paths, it enforces new or stricter invariants.
Even if the author believes the invariant always holds, fuzzing is essential to verify whether
an unusual sequence of operations can violate it.
================================================================================
2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA)
================================================================================
Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories:
- Non-kernel and non-executable changes:
* Modifications to Documentation/, comments, or spelling fixes.
* User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/)
that do not affect the compiled kernel image (vmlinux) or kernel modules.
* Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints
that do not alter control flow or data structures.
* Build system or Kconfig changes that do not alter compiled C logic.
- Structurally unreachable hardware:
* Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed,
ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU.
- Unreachable execution paths:
* Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during
physical PCI hot-unplug or manual sysfs driver unbinding.
* Code paths exclusive to architectures other than the target architecture.
================================================================================
3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA)
================================================================================
Return WorthFuzzing=true whenever the patch touches reachable executable code, including:
- Core Subsystems:
* Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/),
BPF, scheduler, core networking, VFS, or syscall handling.
- Refactorings and Code Cleanups:
* Any restructuring of reachable data structures, helper abstractions, or algorithm flows.
- Runtime Assertions and Defensive Checks:
* Any introduction or alteration of assertions (WARN_ON*, VM_WARN_ON*, BUG_ON*, etc.) in reachable paths.
- Reachable Drivers and Protocols:
* Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.).
================================================================================
4. EXTRACTING FocusSymbols (PREVENTING DILUTION)
================================================================================
When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer:
- AVOID UBIQUITOUS LIFECYCLE HOT-PATHS:
Do NOT list generic, ubiquitous functions called by almost every program in the corpus
(including, but not limited to: general memory allocators and deallocators, page fault
and trap handlers, or core synchronization primitives; this is not an exhaustive list).
Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused",
which severely dilutes fuzzing effort away from the actual changes.
- TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS:
List functions that specifically implement the logic being added or altered, or direct API entrypoints
for the subsystem feature under review.
- HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h):
Compiler-inlined static functions (such as static inlines in mm/*.h or include/linux/*.h) lack
distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters.
If the changes are primarily in static inline helpers, identify non-static, feature-specific caller
functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers).
================================================================================
5. IDENTIFYING EnableConfigs
================================================================================
Identify any specific CONFIG_ options required to properly compile and reach the modified code:
- Inspect Kconfig files and #ifdef guards; do not make assumptions.
- Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed.
- Strip any '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: Target architecture: amd64
For your convenience, here is the diff of the changes:
commit 480a2c2be407e3932b490108707da73bcda93d79
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Nov 3 00:49:51 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 71c2f99cdb7119..c6dd4148a44ce5 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -323,6 +323,9 @@ static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,
req_sz = skb->len + 3;
req_sz &= (uint)~3;
+ if (req_sz > skb->len)
+ memset(skb->data + skb->len, 0, req_sz - skb->len);
+
err = sdio_memcpy_toio(func, addr, ((u8 *)(skb->data)), req_sz);
if (err == -ENOMEDIUM)
diff --git a/drivers/net/wireless/rsi/rsi_91x_sdio.c b/drivers/net/wireless/rsi/rsi_91x_sdio.c
index bfa386b820d895..8bfb08306d03c2 100644
--- a/drivers/net/wireless/rsi/rsi_91x_sdio.c
+++ b/drivers/net/wireless/rsi/rsi_91x_sdio.c
@@ -772,6 +772,9 @@ static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
address = (num_blocks * block_size | (queueno << 12));
length = num_blocks * block_size;
+ if (length > len)
+ memset((u8 *)pkt + len, 0, length - len);
+
status = rsi_sdio_write_register_multiple(adapter,
address,
(u8 *)pkt,
|
| 3/2 | 2026/11/03 00:49 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 3389 output: 39 thoughts: 451 Thoughts: **SDIO Wireless Driver Reachability Analysis** Okay, so this diff touches two files: `bcmsdh.c` (Broadcom's SDIO driver) and `rsi_91x_sdio.c` (Redpine's SDIO driver). My initial thought is to quickly assess whether these SDIO wireless drivers are viable targets for fuzzing in a standard virtualized environment like QEMU or Google Compute Engine. Are these drivers reliant on specific physical hardware? Hold on, before jumping to conclusions, I need to consult syzkaller's reachability criteria. Section 2, the "NEGATIVE CRITERIA," is key here. It outlines scenarios where we *shouldn't* fuzz a patch. The list mentions things like non-executable changes, hardware-specific drivers (PCIe switches, SmartNICs, GPUs) requiring physical cards not emulated by QEMU, and unreachable execution paths (driver teardown callbacks triggered only by hot-unplug). Now, the critical question: What about SDIO wireless drivers? Can SDIO devices be emulated or attached within standard QEMU / syzkaller setups? I need to clarify if QEMU *specifically* emulates SDIO cards, or if it has the capability to emulate the functionalities of brcmfmac or rsi_91x_sdio. I need to understand if there are virtual buses, or any mechanism where these SDIO devices can be probed. I'll need to dig into the kernel code and check syzkaller documentation or search git logs to determine how these drivers probe and are initialized. This is the crucial point for determining whether this patch is worth fuzzing. |
| 4/2 | 2026/11/03 00:50 | tool | grepper |
0mArgs:{
"Expression": "rsi_sdio_host_intf_write_pkt|brcmf_sdiod_skbuff_write"
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=284=static int brcmf_sdiod_skbuff_read(struct brcmf_sdio_dev *sdiodev,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-314-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:315:static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-316-\t\t\t\t struct sdio_func *func, u32 addr,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=610=int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-632-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:633:\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc2, addr, mypkt);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-634-out:\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=640=int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-657-\t\tskb_queue_walk(pktq, skb) {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:658:\t\t\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc2,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-659-\t\t\t\t\t\t addr, skb);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=672=brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-714-\t\t\tmemcpy(pkt-\u003edata, data, dsize);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:715:\t\t\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc1,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-716-\t\t\t\t\t\t sdaddr, pkt);\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=699=static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-745-/**\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:746: * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-747- * @adapter: Pointer to the adapter structure.\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-752- */\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:753:static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-754-\t\t\t\t\tu8 *pkt,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=982=static struct rsi_host_intf_ops sdio_host_intf_ops = {\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:983:\t.write_pkt\t\t= rsi_sdio_host_intf_write_pkt,\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-984-\t.read_pkt\t\t= rsi_sdio_host_intf_read_pkt,\n"
} |
| 5/2 | 2026/11/03 00:50 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 5488 output: 55 thoughts: 10 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person: **Initial Assessment: Navigating the Landscape of Change** Alright, before diving into the specifics of the modification, I need to get a clear picture. My initial instinct is to zoom out and assess the surrounding environment. I'm not going to just focus on the changed lines. I need to understand the *context* of these changes. I'm thinking, "What files are proximate? What other modules, classes, or functions are likely impacted or influenced by this alteration?" I'm looking for a map, not just a pinpoint on a graph. Essentially, I'm thinking, "Let's inspect the files *around* the changes." The goal here is to establish a comprehensive mental model before I get bogged down in the minutiae. This is how I'm going to quickly identify potential ripple effects, uncover implicit dependencies, and get a better feel for the intent behind this code update. |
| 6/2 | 2026/11/03 00:50 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c",
"FirstLine": 315,
"LineCount": 35
}Results: {
"Contents": " 315:\tstatic int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,\n 316:\t\t\t\t\t struct sdio_func *func, u32 addr,\n 317:\t\t\t\t\t struct sk_buff *skb)\n 318:\t{\n 319:\t\tunsigned int req_sz;\n 320:\t\tint err;\n 321:\t\n 322:\t\t/* Single skb use the standard mmc interface */\n 323:\t\treq_sz = skb-\u003elen + 3;\n 324:\t\treq_sz \u0026= (uint)~3;\n 325:\t\n 326:\t\tif (req_sz \u003e skb-\u003elen)\n 327:\t\t\tmemset(skb-\u003edata + skb-\u003elen, 0, req_sz - skb-\u003elen);\n 328:\t\n 329:\t\terr = sdio_memcpy_toio(func, addr, ((u8 *)(skb-\u003edata)), req_sz);\n 330:\t\n 331:\t\tif (err == -ENOMEDIUM)\n 332:\t\t\tbrcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);\n 333:\t\n 334:\t\treturn err;\n 335:\t}\n 336:\t\n 337:\tstatic int mmc_submit_one(struct mmc_data *md, struct mmc_request *mr,\n 338:\t\t\t\t struct mmc_command *mc, int sg_cnt, int req_sz,\n 339:\t\t\t\t int func_blk_sz, u32 *addr,\n 340:\t\t\t\t struct brcmf_sdio_dev *sdiodev,\n 341:\t\t\t\t struct sdio_func *func, int write)\n 342:\t{\n 343:\t\tint ret;\n 344:\t\n 345:\t\tmd-\u003esg_len = sg_cnt;\n 346:\t\tmd-\u003eblocks = req_sz / func_blk_sz;\n 347:\t\tmc-\u003earg |= (*addr \u0026 0x1FFFF) \u003c\u003c 9;\t/* address */\n 348:\t\tmc-\u003earg |= md-\u003eblocks \u0026 0x1FF;\t/* block count */\n 349:\t\t/* incrementing addr for function 1 */\n"
} |
| 7/2 | 2026/11/03 00:50 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 6382 output: 46 thoughts: 182 Thoughts: **Analyzing a Potential Kernel Vulnerability** Okay, let's dive into this `brcmf_sdiod_skbuff_write` function. First thing that jumps out is this: `req_sz = (skb->len + 3) & ~3;` and the subsequent padding with `memset`. The core of my concern focuses on whether `skb->data + skb->len` stays within the buffer's allocated space, particularly regarding the potential for out-of-bounds writes. Specifically, if `req_sz` is *greater* than `skb->len`, that `memset` is writing *beyond* what's strictly allocated in the skb's data area, unless there's sufficient tailroom. That's the real crux of it, isn't it? Is that tailroom guaranteed? Now the question is, *can* this scenario be triggered, and is it reachable via syzkaller? We need to verify if syzkaller can generate an skb where this padding would cause an out-of-bounds write. I'll need to check the related driver code for clues. Let's start with `drivers/net/wireless/rsi/rsi_91x_sdio.c`, as a starting point. |
| 8/2 | 2026/11/03 00:50 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/rsi/rsi_91x_sdio.c",
"FirstLine": 750,
"LineCount": 45
}Results: {
"Contents": " 750:\t *\n 751:\t * Return: 0 on success, -1 on failure.\n 752:\t */\n 753:\tstatic int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,\n 754:\t\t\t\t\t\tu8 *pkt,\n 755:\t\t\t\t\t\tu32 len)\n 756:\t{\n 757:\t\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\n 758:\t\tu32 block_size = dev-\u003etx_blk_size;\n 759:\t\tu32 num_blocks, address, length;\n 760:\t\tu32 queueno;\n 761:\t\tint status;\n 762:\t\n 763:\t\tqueueno = ((pkt[1] \u003e\u003e 4) \u0026 0xf);\n 764:\t\tif (queueno == RSI_BT_MGMT_Q || queueno == RSI_BT_DATA_Q)\n 765:\t\t\tqueueno = RSI_BT_Q;\n 766:\t\n 767:\t\tnum_blocks = len / block_size;\n 768:\t\n 769:\t\tif (len % block_size)\n 770:\t\t\tnum_blocks++;\n 771:\t\n 772:\t\taddress = (num_blocks * block_size | (queueno \u003c\u003c 12));\n 773:\t\tlength = num_blocks * block_size;\n 774:\t\n 775:\t\tif (length \u003e len)\n 776:\t\t\tmemset((u8 *)pkt + len, 0, length - len);\n 777:\t\n 778:\t\tstatus = rsi_sdio_write_register_multiple(adapter,\n 779:\t\t\t\t\t\t\t address,\n 780:\t\t\t\t\t\t\t (u8 *)pkt,\n 781:\t\t\t\t\t\t\t length);\n 782:\t\tif (status)\n 783:\t\t\trsi_dbg(ERR_ZONE, \"%s: Unable to write onto the card: %d\\n\",\n 784:\t\t\t\t__func__, status);\n 785:\t\trsi_dbg(DATA_TX_ZONE, \"%s: Successfully written onto card\\n\", __func__);\n 786:\t\treturn status;\n 787:\t}\n 788:\t\n 789:\t/**\n 790:\t * rsi_sdio_host_intf_read_pkt() - This function reads the packet\n 791:\t *\t\t\t\t from the device.\n 792:\t * @adapter: Pointer to the adapter data structure.\n 793:\t * @pkt: Pointer to the packet data to be read from the device.\n 794:\t * @length: Length of the data to be read from the device.\n"
} |
| 9/2 | 2026/11/03 00:50 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 7605 output: 60 thoughts: 312 Thoughts: **My Analysis of SDIO Reachability in Virtualized Environments** Okay, let's break this down. My primary concern is reachability. I need to figure out if I can even instantiate and test SDIO wireless cards, specifically the Broadcom brcmfmac and RSI SDIO devices, within standard virtualized environments like GCE or QEMU. That's the baseline. First, I need to understand the fundamental mechanics of SDIO driver registration. How do these drivers probe and attach to the system? Is there any existing virtual bus or emulation layer specifically for SDIO wireless devices that I can leverage? That's the core question. Next, I should probably check if syzkaller, which is key to my fuzzing strategy, offers any SDIO emulation capabilities. I know it supports many virtual buses, but SDIO is a specific interface that might not be natively supported. I need to be sure. A quick review of the relevant sections reveals some critical limitations. Section 3 lists reachable drivers and protocols, specifically mentioning those accessible via virtual buses like virtio, USB gadget, loopback, netlink, and others. That gives me hope. However, Section 2 is a bit more concerning. It highlights structurally unreachable hardware such as vendor-specific PCIe switches and SmartNICs. This is a potential red flag as SDIO *could* be considered in the same bracket. The document reiterates that reachability is *the* primary gate. My fuzzing efforts are entirely dependent on code that can execute within standard virtualized environments. So, the key now is to determine whether Linux, QEMU, or syzkaller have *any* SDIO host controller emulation that can actually connect and expose the brcmfmac or rsi_91x_sdio drivers. If there's no suitable emulation, then my strategy needs to change, or I will have to look at other approaches to testing, because I have a serious access problem. Finally, I need to understand how brcmfmac SDIO specifically registers and is probed. This understanding may help me decide whether there is a workaround available. |
| 10/2 | 2026/11/03 00:50 | tool | grepper |
0mArgs:{
"Expression": "sdio_register_driver",
"PathPrefixes": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/",
"drivers/net/wireless/rsi/"
]
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=1274=int brcmf_sdio_register(void)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1275-{\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:1276:\treturn sdio_register_driver(\u0026brcmf_sdmmc_driver);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1277-}\n"
} |
| 11/2 | 2026/11/03 00:50 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 8595 output: 35 thoughts: 18 Thoughts: Here's my take on those thoughts, tailored for an expert audience: **Deeper Dive into the SDIO Driver** Okay, so we're seeing something a bit unexpected, and it warrants a more thorough investigation. While we've looked at the primary areas, I think it’s prudent to broaden the scope. Let’s not limit ourselves just yet. My initial instinct is to go back and cross-reference the `rsi_91x_sdio.c` file. It's a key piece in this puzzle, the SDIO driver for the platform, and likely holds some crucial clues. We may be chasing our tails if we don't ensure we've checked the driver against this new data. Time to dig in and re-evaluate the low-level interactions again. |
| 12/2 | 2026/11/03 00:50 | tool | grepper |
0mArgs:{
"Expression": "sdio_register_driver",
"PathPrefixes": [
"drivers/net/wireless/rsi/"
]
}Results: {
"Output": "no matches"
} |
| 13/2 | 2026/11/03 00:50 | llm | patch-evaluator |
3mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 8829 output: 46 thoughts: 11 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person: **Analyzing Driver Registration and RSI Implementation** Alright, let's dive into this. My initial thought is, "What specifically does the driver registration process utilize in terms of RSI, or, let's be more precise, what is it leveraging in terms of Remote Service Interface design?" This isn't just a generic question; I'm probing for the underlying mechanisms. I'm thinking about the communication protocols, the data structures used for passing registration information, and the overall architecture. My focus is on identifying the specific RSI components, like the particular interfaces and services that the driver registration process interacts with. Is it using a simple request-response mechanism? Or something more complex? I'm curious about the specific methods invoked by the driver registration system – and how these methods influence the performance of the system. I'm also considering how the driver is registered in the system: if that is at boot time, or later. I want to check how the system performs when handling hundreds of drivers, and what factors might influence that. The goal is to see exactly how driver registration interfaces with the larger RSI infrastructure. I know the general principles, but now I want to look at the details. |
| 14/2 | 2026/11/03 00:53 | tool | grepper |
0mArgs:{
"Expression": "rsi_91x_sdio_driver|rsi_sdio_probe",
"PathPrefixes": [
"drivers/net/wireless/rsi/"
]
}Results: {
"Output": "no matches"
} |
| 15/2 | 2026/11/03 00:53 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 9169 output: 48 thoughts: 32 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Diving into the RSI SDIO Driver** Right, let's get down to brass tacks. I'm thinking I need to understand this `rsi_91x_sdio.c` driver better, particularly how it interacts with the system. My initial instinct is to zero in on the core driver setup and initialization. I need to understand how the driver gets loaded. Therefore, my first step is to grep for either "driver" or "probe" within that file. That should allow me to focus in on the primary entry points and the module initialization routines. "probe" is going to be my key focus. I'm expecting that the probe function will reveal the device configuration and any hardware initialization that needs to occur. |
| 16/2 | 2026/11/03 00:54 | tool | grepper |
0mArgs:{
"Expression": "module_driver|module_init|probe",
"PathPrefixes": [
"drivers/net/wireless/rsi/rsi_91x_sdio.c"
]
}Results: {
"Output": "drivers/net/wireless/rsi/rsi_91x_sdio.c=982=static struct rsi_host_intf_ops sdio_host_intf_ops = {\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-995-/**\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:996: * rsi_probe() - This function is called by kernel when the driver provided\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-997- *\t\t Vendor and device IDs are matched. All the initialization\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1003- */\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1004:static int rsi_probe(struct sdio_func *pfunction,\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1005-\t\t const struct sdio_device_id *id)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1089-\trsi_91x_deinit(adapter);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1090:\trsi_dbg(ERR_ZONE, \"%s: Failed in probe...Exiting\\n\", __func__);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1091-\treturn status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1109=static void rsi_reset_chip(struct rsi_hw *adapter)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1204-/**\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1205: * rsi_disconnect() - This function performs the reverse of the probe function.\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1206- * @pfunction: Pointer to the sdio_func structure.\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1512=static struct sdio_driver rsi_driver = {\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1513-\t.name = \"RSI-SDIO WLAN\",\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1514:\t.probe = rsi_probe,\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1515-\t.remove = rsi_disconnect,\n"
} |
| 17/2 | 2026/11/03 00:54 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10107 output: 42 thoughts: 28 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Analyzing the rsi_driver Registration** Right, let's dissect this. `rsi_driver` is, as the code clearly states, a `struct sdio_driver`. My immediate thought is, "Okay, so it's an SDIO driver – that's straightforward." Now, the critical question, the one that really gets the gears turning, is *where* this driver is actually registered. I need to trace its registration path. Where is `rsi_driver` being passed to `sdio_register_driver()` or a similar function? I need to understand its relationship with the SDIO core. What's the bus matching mechanism in play here? Is it using device IDs, or is there a more complex approach? Understanding the registration location will quickly uncover its priorities, associated resources, and overall design architecture within the kernel. Time to dig in and find those registration calls! |
| 18/2 | 2026/11/03 00:54 | tool | grepper |
0mArgs:{
"Expression": "rsi_driver",
"PathPrefixes": [
"drivers/net/wireless/rsi/rsi_91x_sdio.c"
]
}Results: {
"Output": "drivers/net/wireless/rsi/rsi_91x_sdio.c=1506=static const struct sdio_device_id rsi_dev_table[] = {\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1511-\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1512:static struct sdio_driver rsi_driver = {\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1513-\t.name = \"RSI-SDIO WLAN\",\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1523-};\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1524:module_sdio_driver(rsi_driver);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1525-\n"
} |
| 19/2 | 2026/11/03 00:54 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10628 output: 28 thoughts: 111 Thoughts: **SDIO Driver Inquiry** Okay, so I'm thinking about these two SDIO drivers, `rsi_driver` and `brcmf_sdmmc_driver`. The key question is, can I actually test these SDIO devices and drivers effectively in a virtual environment like QEMU, or even using GCE or Syzkaller? Hold on... let's pause and consider. I need to figure out if Syzkaller already fuzzes SDIO. That's a crucial first step. Then, the bigger challenge: does the Linux kernel have a built-in SDIO emulator, or even some sort of virtual bus that I can leverage? I should probably start by exploring the `drivers/mmc` and `drivers/net/wireless` directories to see if there's any sort of dummy MMC or SDIO host, or any relevant emulation code. This is a critical area, as a realistic testing environment is paramount. |
| 20/2 | 2026/11/03 00:54 | tool | grepper |
0mArgs:{
"Expression": "sdio.*dummy|dummy.*sdio|virt.*sdio"
}Results: {
"Output": "drivers/net/wireless/ath/ath10k/sdio.c=674=static int ath10k_sdio_mbox_rx_fetch_bundle(struct ath10k *ar)\n--\ndrivers/net/wireless/ath/ath10k/sdio.c-683-\tfor (i = 0; i \u003c ar_sdio-\u003en_rx_pkts; i++)\ndrivers/net/wireless/ath/ath10k/sdio.c:684:\t\tvirt_pkt_len += ar_sdio-\u003erx_pkts[i].alloc_len;\ndrivers/net/wireless/ath/ath10k/sdio.c-685-\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=82=static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-92-/* dummy handler for SDIO function 2 interrupt */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:93:static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-94-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=97=int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-159-\t\tsdio_claim_irq(sdiodev-\u003efunc1, brcmf_sdiod_ib_irqhandler);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:160:\t\tsdio_claim_irq(sdiodev-\u003efunc2, brcmf_sdiod_dummy_irqhandler);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-161-\t\tsdio_release_host(sdiodev-\u003efunc1);\n--\ndrivers/pinctrl/meson/pinctrl-meson-g12a.c=1001=static const char * const sdio_groups[] = {\ndrivers/pinctrl/meson/pinctrl-meson-g12a.c-1002-\t\"sdio_d0\", \"sdio_d1\", \"sdio_d2\", \"sdio_d3\",\ndrivers/pinctrl/meson/pinctrl-meson-g12a.c:1003:\t\"sdio_cmd\", \"sdio_clk\", \"sdio_dummy\",\ndrivers/pinctrl/meson/pinctrl-meson-g12a.c-1004-};\n"
} |
| 21/2 | 2026/11/03 00:54 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 11742 output: 22 thoughts: 256 Thoughts: **SDIO Exploration - A Dead End (For Now)** Okay, so I'm wondering if I can emulate or probe SDIO devices somehow. My first instinct is to check syzkaller – see if it has any existing support for SDIO or if there are any virtual or mock SDIO device definitions floating around. Pseudo-syscalls might be the key...but wait! Crucial reminder: I *can't* use the usual syzkaller search tools on syzkaller syzlang descriptions or anything with "long syz_". Those pseudo-syscalls aren't actually in the kernel. I need to be using `read-syz-spec` and `syz-grepper` instead. Now, a critical question: Are those tools even *declared*? Let's check the declaration list. Uh oh. `grepper`, `codesearch-dir-index`, `read-file`, and `set-results` are there, but no sign of `read-syz-spec` and `syz-grepper`. Damn. That's a definite roadblock. Alright, a shift in strategy. Maybe I can find virtual MMC/SD/SDIO drivers in the `drivers/mmc` directory. It is a shot in the dark, but it's worth checking to see if there is any way to interact with those. |
| 22/2 | 2026/11/03 00:55 | tool | codesearch-dir-index |
0mArgs:{
"Dir": "drivers/mmc"
}Results: {
"Files": null,
"Subdirs": [
"core",
"host"
]
} |
| 23/2 | 2026/11/03 00:55 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 12329 output: 24 thoughts: 11 Thoughts: Okay, here's my attempt at summarizing that thought process, tailored for an expert audience: **Diving into the MMC Host Drivers** Right, time to get to the heart of the matter. My initial instinct, given the context, is to zero in on the MMC (MultiMediaCard) host driver subsystem. It's the logical place to start digging when troubleshooting, optimizing, or just understanding the interaction between the system and the MMC/SD card interface. I need to refresh my understanding of how the drivers are set up. I'll need to check the critical path functions, interrupt handling, and any power management considerations within that directory. I'm expecting to find the standard block device driver structure in place, but I want to see how this particular implementation handles any hardware quirks or custom features of the specific MMC host controller I'm dealing with. Let's see what's in `/drivers/mmc/host`. |
| 24/2 | 2026/11/03 00:55 | tool | codesearch-dir-index |
0mArgs:{
"Dir": "drivers/mmc/host"
}Results: {
"Files": [
"alcor.c",
"atmel-mci.c",
"au1xmmc.c",
"bcm2835.c",
"cavium-octeon.c",
"cavium-thunderx.c",
"cavium.c",
"cavium.h",
"cb710-mmc.c",
"cb710-mmc.h",
"cqhci-core.c",
"cqhci-crypto.c",
"cqhci-crypto.h",
"cqhci.h",
"davinci_mmc.c",
"dw_mmc-bluefield.c",
"dw_mmc-exynos.c",
"dw_mmc-exynos.h",
"dw_mmc-hi3798cv200.c",
"dw_mmc-hi3798mv200.c",
"dw_mmc-k3.c",
"dw_mmc-pci.c",
"dw_mmc-pltfm.c",
"dw_mmc-pltfm.h",
"dw_mmc-rockchip.c",
"dw_mmc-starfive.c",
"dw_mmc.c",
"dw_mmc.h",
"jz4740_mmc.c",
"litex_mmc.c",
"loongson2-mmc.c",
"meson-gx-mmc.c",
"meson-mx-sdhc-clkc.c",
"meson-mx-sdhc-mmc.c",
"meson-mx-sdhc.h",
"meson-mx-sdio.c",
"mmc_hsq.c",
"mmc_hsq.h",
"mmc_spi.c",
"mmci.c",
"mmci.h",
"mmci_qcom_dml.c",
"mmci_stm32_sdmmc.c",
"moxart-mmc.c",
"mtk-sd.c",
"mvsdio.c",
"mvsdio.h",
"mxcmmc.c",
"mxs-mmc.c",
"of_mmc_spi.c",
"omap.c",
"omap_hsmmc.c",
"owl-mmc.c",
"pxamci.c",
"pxamci.h",
"renesas_sdhi.h",
"renesas_sdhi_core.c",
"renesas_sdhi_internal_dmac.c",
"renesas_sdhi_sys_dmac.c",
"rtsx_pci_sdmmc.c",
"rtsx_usb_sdmmc.c",
"sdhci-acpi.c",
"sdhci-bcm-kona.c",
"sdhci-brcmstb.c",
"sdhci-cadence-core.c",
"sdhci-cadence-phy-v6.c",
"sdhci-cadence.h",
"sdhci-cqhci.h",
"sdhci-dove.c",
"sdhci-esdhc-imx.c",
"sdhci-esdhc-mcf.c",
"sdhci-esdhc.h",
"sdhci-iproc.c",
"sdhci-milbeaut.c",
"sdhci-msm.c",
"sdhci-npcm.c",
"sdhci-of-arasan.c",
"sdhci-of-aspeed-test.c",
"sdhci-of-aspeed.c",
"sdhci-of-at91.c",
"sdhci-of-bst.c",
"sdhci-of-dwcmshc.c",
"sdhci-of-esdhc.c",
"sdhci-of-hlwd.c",
"sdhci-of-k1.c",
"sdhci-of-ma35d1.c",
"sdhci-of-sparx5.c",
"sdhci-omap.c",
"sdhci-pci-arasan.c",
"sdhci-pci-core.c",
"sdhci-pci-dwc-mshc.c",
"sdhci-pci-gli.c",
"sdhci-pci-o2micro.c",
"sdhci-pci.h",
"sdhci-pic32.c",
"sdhci-pltfm.c",
"sdhci-pltfm.h",
"sdhci-pxav2.c",
"sdhci-pxav3.c",
"sdhci-s3c.c",
"sdhci-spear.c",
"sdhci-sprd.c",
"sdhci-st.c",
"sdhci-tegra.c",
"sdhci-uhs2.c",
"sdhci-uhs2.h",
"sdhci-xenon-phy.c",
"sdhci-xenon.c",
"sdhci-xenon.h",
"sdhci.c",
"sdhci.h",
"sdhci_am654.c",
"sdhci_f_sdh30.c",
"sdhci_f_sdh30.h",
"sdricoh_cs.c",
"sh_mmcif.c",
"sunplus-mmc.c",
"sunxi-mmc.c",
"tifm_sd.c",
"tmio_mmc.h",
"tmio_mmc_core.c",
"toshsd.c",
"toshsd.h",
"uniphier-sd.c",
"usdhi6rol0.c",
"ushc.c",
"via-sdmmc.c",
"wbsd.c",
"wbsd.h",
"wmt-sdmmc.c"
],
"Subdirs": null
} |
| 25/2 | 2026/11/03 00:55 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 13989 output: 29 thoughts: 248 Thoughts: **My Initial Thoughts on SDIO Emulation** Okay, so I'm pondering this SDIO situation. My first question is: can SDIO devices be *generally* attached to anything? Let's refresh my understanding and consider what SDIO devices are. Ah, right, they're physical SDIO cards that slot into SD/MMC slots. Now, a key question comes to mind: can QEMU emulate these SDIO cards? I know QEMU handles SD memory cards, using options like `-drive file=...,if=sd` or the `sd-card` qdev. But the real question is whether it simulates the more specialized SDIO WiFi cards, like those from Broadcom or Redpine Signals. The answer, as far as I know, is a firm "no"! QEMU doesn't offer emulation for *any* Broadcom or Redpine Signals SDIO WiFi card. So, a new direction. What about USB gadget emulation? I know with the Raw Gadget, USB/IP, or dummy_hcd options, syzkaller can emulate arbitrary USB devices, which is quite powerful. Basically, any USB driver, like ath9k_htc, rtl8xxxu, or even brcmfmac USB can be tested using Raw Gadget because syzkaller can generate USB descriptor packets and effectively be the USB device itself. Now, a more precise question forms: can syzkaller emulate SDIO devices? That's what I need to figure out. The real hurdle is, is there an SDIO gadget or something functionally equivalent, a "raw SDIO" mechanism, within the Linux kernel? I need to look for that and see if it exists. Time for a search using "sdio gadget" or something similar. |
| 26/2 | 2026/11/03 00:55 | tool | grepper |
0mArgs:{
"Expression": "CONFIG_MMC_TEST|sdio.*raw|raw.*sdio"
}Results: {
"Output": "Documentation/driver-api/mmc/mmc-test.rst=27=To use the ``mmc_test`` framework, follow these steps:\n--\nDocumentation/driver-api/mmc/mmc-test.rst-30-\nDocumentation/driver-api/mmc/mmc-test.rst:31: Ensure that the ``CONFIG_MMC_TEST`` kernel configuration option is enabled. This can be done by configuring the kernel:\nDocumentation/driver-api/mmc/mmc-test.rst-32-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-46-\nDocumentation/driver-api/mmc/mmc-test.rst:47: echo \"CONFIG_MMC_TEST=y\" \u003e\u003e .config\nDocumentation/driver-api/mmc/mmc-test.rst-48-\n--\ndrivers/mmc/core/Makefile=18=mmc_block-objs\t\t\t:= block.o queue.o\ndrivers/mmc/core/Makefile:19:obj-$(CONFIG_MMC_TEST)\t\t+= mmc_test.o\ndrivers/mmc/core/Makefile-20-obj-$(CONFIG_SDIO_UART)\t\t+= sdio_uart.o\n--\ndrivers/net/wireless/ath/ath10k/sdio.c=73=static inline bool is_trailer_only_msg(struct ath10k_sdio_rx_data *pkt)\n--\ndrivers/net/wireless/ath/ath10k/sdio.c-87-\ndrivers/net/wireless/ath/ath10k/sdio.c:88:static inline void ath10k_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw,\ndrivers/net/wireless/ath/ath10k/sdio.c-89-\t\t\t\t\t unsigned int address,\n--\ndrivers/net/wireless/ath/ath6kl/sdio.c=109=static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func,\n--\ndrivers/net/wireless/ath/ath6kl/sdio.c-120-\ndrivers/net/wireless/ath/ath6kl/sdio.c:121:static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw,\ndrivers/net/wireless/ath/ath6kl/sdio.c-122-\t\t\t\t\t unsigned int address,\n--\ndrivers/net/wireless/ti/wlcore/sdio.c=41=static void wl1271_sdio_set_block_size(struct device *child,\n--\ndrivers/net/wireless/ti/wlcore/sdio.c-51-\ndrivers/net/wireless/ti/wlcore/sdio.c:52:static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,\ndrivers/net/wireless/ti/wlcore/sdio.c-53-\t\t\t\t\t void *buf, size_t len, bool fixed)\n--\ndrivers/net/wireless/ti/wlcore/sdio.c-89-\ndrivers/net/wireless/ti/wlcore/sdio.c:90:static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,\ndrivers/net/wireless/ti/wlcore/sdio.c-91-\t\t\t\t\t void *buf, size_t len, bool fixed)\n--\ndrivers/net/wireless/ti/wlcore/sdio.c=179=static struct wl1271_if_operations sdio_ops = {\ndrivers/net/wireless/ti/wlcore/sdio.c:180:\t.read\t\t= wl12xx_sdio_raw_read,\ndrivers/net/wireless/ti/wlcore/sdio.c:181:\t.write\t\t= wl12xx_sdio_raw_write,\ndrivers/net/wireless/ti/wlcore/sdio.c-182-\t.power\t\t= wl12xx_sdio_set_power,\n"
} |
| 27/2 | 2026/11/03 00:55 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 15657 output: 48 thoughts: 131 Thoughts: Okay, let's see. My initial thought is: **Could these drivers, `brcmfmac` or `rsi_91x`, possibly be accessed through USB or PCI interfaces?** My next step, and this is crucial, is to pinpoint the exact functions that have been modified. Understanding the scope of the change is paramount. Specifically, the file that jumps out is `drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c`. Ah, `brcmf_sdiod_skbuff_write()` - that's interesting. Wait a second... `bcmsdh.c`... isn't that specifically for SDIO? Let's clarify. Yes, the name 'bcmsdh' – that's BCM SD Host, or SDIO Host. The nomenclature makes it pretty clear. Now, I need to understand the larger context. My next line of investigation will be to identify precisely where `bcmsdh.c` is compiled and how it's being utilized within the broader system. I need to trace its usage. |
| 28/2 | 2026/11/03 00:56 | tool | grepper |
0mArgs:{
"Expression": "bcmsdh\\.o",
"PathPrefixes": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/"
]
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/Makefile=36=brcmfmac-$(CONFIG_BRCMFMAC_SDIO) += \\\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/Makefile-37-\t\tsdio.o \\\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/Makefile:38:\t\tbcmsdh.o\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/Makefile-39-brcmfmac-$(CONFIG_BRCMFMAC_USB) += \\\n"
} |
| 29/2 | 2026/11/03 00:56 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 16244 output: 37 thoughts: 114 Thoughts: **Examining the BRCMFMAC Driver Build Configuration** Okay, let's take a look at this build configuration. I see that the `brcmfmac` driver is conditionally compiled based on various `CONFIG_BRCMFMAC_*` flags. Specifically, there's a line that clearly ties `bcmsdh.o` to `CONFIG_BRCMFMAC_SDIO`: `brcmfmac-$(CONFIG_BRCMFMAC_SDIO) += sdio.o bcmsdh.o`. This tells me that `bcmsdh.c` is going to be part of the build *only* when the SDIO configuration option is enabled. That's good to know. Now, let's pivot and check `rsi_91x_sdio.c`. I wonder if this code is related, and if there are any interesting interactions. |
| 30/2 | 2026/11/03 00:56 | tool | grepper |
0mArgs:{
"Expression": "rsi_91x_sdio",
"PathPrefixes": [
"drivers/net/wireless/rsi/"
]
}Results: {
"Output": "drivers/net/wireless/rsi/Makefile=11=rsi_usb-y\t\t\t+= rsi_91x_usb.o rsi_91x_usb_ops.o\ndrivers/net/wireless/rsi/Makefile:12:rsi_sdio-y\t\t\t+= rsi_91x_sdio.o rsi_91x_sdio_ops.o\ndrivers/net/wireless/rsi/Makefile-13-obj-$(CONFIG_RSI_91X) \t\t+= rsi_91x.o\n--\ndrivers/net/wireless/rsi/rsi_91x_debugfs.c=27=static int rsi_sdio_stats_read(struct seq_file *seq, void *data)\n--\ndrivers/net/wireless/rsi/rsi_91x_debugfs.c-30-\tstruct rsi_hw *adapter = common-\u003epriv;\ndrivers/net/wireless/rsi/rsi_91x_debugfs.c:31:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_debugfs.c-32-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=144=static void rsi_handle_interrupt(struct sdio_func *function)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-146-\tstruct rsi_hw *adapter = sdio_get_drvdata(function);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:147:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-148-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=337=static void rsi_setclock(struct rsi_hw *adapter, u32 freq)\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-338-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:339:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-340-\tstruct mmc_host *host = dev-\u003epfunction-\u003ecard-\u003ehost;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=357=static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-358-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:359:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-360-\tint status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=378=static int rsi_setupcard(struct rsi_hw *adapter)\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-379-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:380:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-381-\tint status = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=402=int rsi_sdio_read_register(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-405-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:406:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-407-\tu8 fun_num = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=434=int rsi_sdio_write_register(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-438-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:439:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-440-\tint status = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=487=static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-491-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:492:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-493-\tu32 status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=518=int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-522-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:523:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-524-\tint status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=753=static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-756-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:757:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-758-\tu32 block_size = dev-\u003etx_blk_size;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=828=static int rsi_init_sdio_interface(struct rsi_hw *adapter,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-830-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:831:\tstruct rsi_91x_sdiodev *rsi_91x_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-832-\tint status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=885=static int rsi_sdio_reinit_device(struct rsi_hw *adapter)\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-886-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:887:\tstruct rsi_91x_sdiodev *sdev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-888-\tstruct sdio_func *pfunction = sdev-\u003epfunction;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1004=static int rsi_probe(struct sdio_func *pfunction,\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1007-\tstruct rsi_hw *adapter;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1008:\tstruct rsi_91x_sdiodev *sdev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1009-\tint status = -EINVAL;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1210=static void rsi_disconnect(struct sdio_func *pfunction)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1212-\tstruct rsi_hw *adapter = sdio_get_drvdata(pfunction);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1213:\tstruct rsi_91x_sdiodev *dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1214-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1250=static int rsi_set_sdio_pm_caps(struct rsi_hw *adapter)\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1251-{\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1252:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1253-\tstruct sdio_func *func = dev-\u003epfunction;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1388=static int rsi_freeze(struct device *dev)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1393-\tstruct rsi_common *common;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1394:\tstruct rsi_91x_sdiodev *sdev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1395-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1449=static void rsi_shutdown(struct sdio_func *pfunction)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1451-\tstruct rsi_hw *adapter = sdio_get_drvdata(pfunction);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1452:\tstruct rsi_91x_sdiodev *sdev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1453-\tstruct ieee80211_hw *hw = adapter-\u003ehw;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=65=int rsi_sdio_rx_thread(void *data)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-68-\tstruct rsi_hw *adapter = common-\u003epriv;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:69:\tstruct rsi_91x_sdiodev *sdev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-70-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=89=static int rsi_process_pkt(struct rsi_common *common)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-91-\tstruct rsi_hw *adapter = common-\u003epriv;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:92:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-93-\tu8 num_blks = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=148=int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-149-{\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:150:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-151-\tu8 function = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=232=static void rsi_rx_handler(struct rsi_hw *adapter)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-234-\tstruct rsi_common *common = adapter-\u003epriv;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:235:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-236-\tint status;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-334-/* This function is used to read buffer status register and\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:335: * set relevant fields in rsi_91x_sdiodev struct.\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-336- */\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=337=int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num)\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-339-\tstruct rsi_common *common = adapter-\u003epriv;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:340:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-341-\tu8 buf_status = 0;\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c=407=int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter)\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-408-{\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c:409:\tstruct rsi_91x_sdiodev *dev = adapter-\u003ersi_dev;\ndrivers/net/wireless/rsi/rsi_91x_sdio_ops.c-410-\n--\ndrivers/net/wireless/rsi/rsi_sdio.h=95=struct receive_info {\n--\ndrivers/net/wireless/rsi/rsi_sdio.h-109-\ndrivers/net/wireless/rsi/rsi_sdio.h:110:struct rsi_91x_sdiodev {\ndrivers/net/wireless/rsi/rsi_sdio.h-111-\tstruct sdio_func *pfunction;\n"
} |
| 31/2 | 2026/11/03 00:56 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 20526 output: 18 thoughts: 608 Thoughts: **SDIO Driver Reachability Assessment** Okay, so I'm looking at these two SDIO bus drivers: `brcmfmac` for Broadcom and `rsi_91x_sdio` for Redpine Signals. My initial thought is, are these even *fuzzable* according to the triage philosophy? This hinges entirely on whether these SDIO devices are reachable within standard virtualized environments, like GCE or QEMU. The core principle is reachability. If the code *can't* execute in a standard environment, it's not worth fuzzing, regardless of how complex or bug-prone it might be. The negative criteria explicitly lists "structurally unreachable hardware" as a reason to bail. This is where I have to pause. Are SDIO devices in that category? I need to figure out if QEMU or GCE has decent SDIO support. Let's see... QEMU emulates SD memory cards (`hw/sd/sd.c`), but does it support SDIO devices specifically? The answer is looking like a firm no for broadcom or redpine wireless devices. There's no generic SDIO card emulation for those. This is a problem. Can I get around this lack of direct SDIO emulation somehow? Maybe a software-emulated device in QEMU could be leveraged? Or, could the Linux kernel itself simulate the SDIO card via some other mechanism? Maybe syzkaller has some SDIO support or a mock device. I have to check for related kernel configurations like `CONFIG_MMC` and the `drivers/mmc` directory, or search for "sdio" in the kernel source. The goal is to find a way to make the driver reachable within the standard fuzzing environment. If I can't find anything, the code is likely unreachable. |
| 32/2 | 2026/11/03 00:56 | tool | grepper |
0mArgs:{
"Expression": "CONFIG_SDIO"
}Results: {
"Output": "arch/arm/configs/multi_v5_defconfig=219=CONFIG_MMC=y\narch/arm/configs/multi_v5_defconfig:220:CONFIG_SDIO_UART=y\narch/arm/configs/multi_v5_defconfig-221-CONFIG_MMC_SDHCI=m\n--\narch/arm/configs/mvebu_v5_defconfig=140=CONFIG_MMC=y\narch/arm/configs/mvebu_v5_defconfig:141:CONFIG_SDIO_UART=y\narch/arm/configs/mvebu_v5_defconfig-142-CONFIG_MMC_MVSDIO=y\n--\narch/arm/configs/omap2plus_defconfig=602=CONFIG_MMC=y\narch/arm/configs/omap2plus_defconfig:603:CONFIG_SDIO_UART=y\narch/arm/configs/omap2plus_defconfig-604-CONFIG_MMC_SDHCI=y\n--\narch/arm/configs/pxa_defconfig=505=CONFIG_MMC_BLOCK_MINORS=16\narch/arm/configs/pxa_defconfig:506:CONFIG_SDIO_UART=m\narch/arm/configs/pxa_defconfig-507-CONFIG_MMC_PXA=m\n--\narch/arm/configs/s3c6400_defconfig=48=CONFIG_MMC=y\narch/arm/configs/s3c6400_defconfig:49:CONFIG_SDIO_UART=y\narch/arm/configs/s3c6400_defconfig-50-CONFIG_MMC_DEBUG=y\n--\narch/mips/configs/db1xxx_defconfig=162=CONFIG_MMC=y\narch/mips/configs/db1xxx_defconfig:163:CONFIG_SDIO_UART=y\narch/mips/configs/db1xxx_defconfig-164-CONFIG_MMC_AU1X=y\n--\ndrivers/mmc/core/Makefile=19=obj-$(CONFIG_MMC_TEST)\t\t+= mmc_test.o\ndrivers/mmc/core/Makefile:20:obj-$(CONFIG_SDIO_UART)\t\t+= sdio_uart.o\ndrivers/mmc/core/Makefile-21-mmc_core-$(CONFIG_MMC_CRYPTO)\t+= crypto.o\n"
} |
| 33/2 | 2026/11/03 00:56 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 22133 output: 48 thoughts: 627 Thoughts: **Analyzing the Scope of These SDIO Changes** Okay, let's get a handle on this patch series. My initial thought is to quickly verify if these changes are confined to SDIO-specific contexts. I need to make sure I haven't overlooked any other SDIO controllers or tests lurking around. Hmm, what about `drivers/net/wireless/virtual` or `mac80211_hwsim`? No, wait... `mac80211_hwsim` is software-simulated, so it won't be touching the `bcmsdh` or `rsi_sdio` interfaces. Right, so we're dealing with hardware drivers here: `brcmfmac` and `rsi`. Specifically, `brcmfmac` has SDIO, PCIe, and USB options, while `rsi_91x` can be SDIO or USB. So, the patch series claims the changes are limited to `bcmsdh.c` (`brcmf_sdiod_skbuff_write` function) and `rsi_91x_sdio.c` (`rsi_sdio_host_intf_write_pkt` function), which would appear to be only SDIO-related, as these are the interfaces of the two relevant wireless cards! But, I need to confirm this rigorously. Let's make absolutely sure `brcmf_sdiod_skbuff_write` is *only* called from within the SDIO path. Let me double-check its callers. It's static, so that limits things. Okay, I see: 1. `brcmf_sdiod_send_buf()` 2. `brcmf_sdiod_send_pkt()` 3. `brcmf_sdiod_ramrw()` All these functions are *also* in `bcmsdh.c`! And this `bcmsdh.c` module is only built when `CONFIG_BRCMFMAC_SDIO` is enabled; it is the SDIO Host layer for brcmfmac. Now, who calls the `brcmf_sdiod_*` functions? Ah-ha! It's `drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c`. But can `sdio.c` get invoked if there isn't an SDIO device probe? I'm going to quickly check `sdio.c` to be sure. |
| 34/2 | 2026/11/03 00:56 | tool | grepper |
0mArgs:{
"Expression": "brcmf_sdiod_send_pkt",
"PathPrefixes": [
"drivers/net/wireless/broadcom/brcm80211/"
]
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=610=int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-639-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:640:int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-641-\t\t\t struct sk_buff_head *pktq)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c=2300=static int brcmf_sdio_txpkt(struct brcmf_sdio *bus, struct sk_buff_head *pktq,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2312-\tsdio_claim_host(bus-\u003esdiodev-\u003efunc1);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:2313:\tret = brcmf_sdiod_send_pkt(bus-\u003esdiodev, pktq);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2314-\tbus-\u003esdcnt.f2txdata++;\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h=307=void brcmf_sdiod_writel(struct brcmf_sdio_dev *sdiodev, u32 addr, u32 data,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h-320- */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h:321:int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h-322-\t\t\t struct sk_buff_head *pktq);\n"
} |
| 35/2 | 2026/11/03 00:56 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 23989 output: 20 thoughts: 525 Thoughts: **My Investigation into SDIO Device Emulation in Virtualized Environments** Okay, so I'm digging into this `brcmf_sdio_txpkt` function, which, as expected, is right there in `sdio.c`. Now, let's see where that gets called from. Ah, `rsi_sdio_host_intf_write_pkt`... right, in `drivers/net/wireless/rsi/rsi_91x_sdio.c`. And I see the connection: `sdio_host_intf_ops.write_pkt = rsi_sdio_host_intf_write_pkt;`. This is only used when the RSI device is set up as an SDIO device. The question that's jumping to mind is: can SDIO devices *actually* be probed in syzkaller or a standard virtualized environment like GCE or QEMU? Hold on... let's break this down. In QEMU or GCE on amd64, is SDIO even a thing? GCE instances are virtual machines in Google Cloud. No physical SD card slots, no SDIO host controllers. Bingo! They're not going to be running SDIO devices natively. Okay, what about QEMU on amd64? Does it emulate an SDIO WiFi adapter? No, and that's the key difference. QEMU only supports SD memory cards on SDHCI controllers. It doesn't emulate the intricacies of SDIO WiFi cards like the Broadcom BCM43xxx or the Redpine RS9113. Wait... can USB somehow be used to *emulate* SDIO? There are USB-to-SDIO bridges, like those used by `rtsx_usb_sdmmc`, or `ushc` or USB card readers. But even if we could get a USB card reader emulated via Raw Gadget, does syzkaller model an SDIO card downstream of an MMC/SD host controller? Wait, how does Linux MMC subsystem figure out an SDIO card when it detects an MMC host? It sends CMD5 (IO_SEND_OP_COND). Can syzkaller fuzz SDIO through something like a USB-SD reader? Let's think... Syzkaller can emulate USB devices using Raw Gadget (`/dev/raw-gadget`) or the Dummy HCD (`dummy_hcd`). It can enumerate USB drivers like the USB WiFi adapters: `rt2800usb`, `rtl8xxxu`, `ath9k_htc`, `brcmfmac` via USB, because it understands and speaks the USB protocol to Raw Gadget. But... what about SDIO? Is there an SDIO gadget? Is there SDIO emulation? Time to search the kernel tree for "sdio" in the context of "gadget", "mock", or "virtual SDIO". Let's see what's out there. |
| 36/2 | 2026/11/03 00:57 | tool | grepper |
0mArgs:{
"Expression": "module_sdio_driver"
}Results: {
"Output": "drivers/bluetooth/btmtksdio.c=1617=static struct sdio_driver btmtksdio_driver = {\n--\ndrivers/bluetooth/btmtksdio.c-1626-\ndrivers/bluetooth/btmtksdio.c:1627:module_sdio_driver(btmtksdio_driver);\ndrivers/bluetooth/btmtksdio.c-1628-\n--\ndrivers/bluetooth/btsdio.c=363=static struct sdio_driver btsdio_driver = {\n--\ndrivers/bluetooth/btsdio.c-369-\ndrivers/bluetooth/btsdio.c:370:module_sdio_driver(btsdio_driver);\ndrivers/bluetooth/btsdio.c-371-\n--\ndrivers/media/mmc/siano/smssdio.c=341=static struct sdio_driver smssdio_driver = {\n--\ndrivers/media/mmc/siano/smssdio.c-346-};\ndrivers/media/mmc/siano/smssdio.c:347:module_sdio_driver(smssdio_driver);\ndrivers/media/mmc/siano/smssdio.c-348-\n--\ndrivers/net/wireless/ath/ath10k/sdio.c=2671=static struct sdio_driver ath10k_sdio_driver = {\n--\ndrivers/net/wireless/ath/ath10k/sdio.c-2679-};\ndrivers/net/wireless/ath/ath10k/sdio.c:2680:module_sdio_driver(ath10k_sdio_driver);\ndrivers/net/wireless/ath/ath10k/sdio.c-2681-\n--\ndrivers/net/wireless/ath/ath6kl/sdio.c=1423=static struct sdio_driver ath6kl_sdio_driver = {\n--\ndrivers/net/wireless/ath/ath6kl/sdio.c-1429-};\ndrivers/net/wireless/ath/ath6kl/sdio.c:1430:module_sdio_driver(ath6kl_sdio_driver);\ndrivers/net/wireless/ath/ath6kl/sdio.c-1431-\n--\ndrivers/net/wireless/marvell/mwifiex/sdio.c=3173=static const struct mwifiex_if_ops sdio_ops = {\n--\ndrivers/net/wireless/marvell/mwifiex/sdio.c-3200-\ndrivers/net/wireless/marvell/mwifiex/sdio.c:3201:module_sdio_driver(mwifiex_sdio);\ndrivers/net/wireless/marvell/mwifiex/sdio.c-3202-\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/sdio.c=246=static struct sdio_driver mt7663s_driver = {\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/sdio.c-252-};\ndrivers/net/wireless/mediatek/mt76/mt7615/sdio.c:253:module_sdio_driver(mt7663s_driver);\ndrivers/net/wireless/mediatek/mt76/mt7615/sdio.c-254-\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/sdio.c=327=static struct sdio_driver mt7921s_driver = {\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/sdio.c-333-};\ndrivers/net/wireless/mediatek/mt76/mt7921/sdio.c:334:module_sdio_driver(mt7921s_driver);\ndrivers/net/wireless/mediatek/mt76/mt7921/sdio.c-335-MODULE_DESCRIPTION(\"MediaTek MT7921S (SDIO) wireless driver\");\n--\ndrivers/net/wireless/microchip/wilc1000/sdio.c=1063=static struct sdio_driver wilc_sdio_driver = {\n--\ndrivers/net/wireless/microchip/wilc1000/sdio.c-1072-};\ndrivers/net/wireless/microchip/wilc1000/sdio.c:1073:module_sdio_driver(wilc_sdio_driver);\ndrivers/net/wireless/microchip/wilc1000/sdio.c-1074-\n--\ndrivers/net/wireless/morsemicro/mm81x/sdio.c=601=static struct sdio_driver mm81x_sdio_driver = {\n--\ndrivers/net/wireless/morsemicro/mm81x/sdio.c-607-\ndrivers/net/wireless/morsemicro/mm81x/sdio.c:608:module_sdio_driver(mm81x_sdio_driver);\ndrivers/net/wireless/morsemicro/mm81x/sdio.c-609-\n--\ndrivers/net/wireless/nxp/nxpwifi/sdio.c=2309=static struct nxpwifi_if_ops sdio_ops = {\n--\ndrivers/net/wireless/nxp/nxpwifi/sdio.c-2336-\ndrivers/net/wireless/nxp/nxpwifi/sdio.c:2337:module_sdio_driver(nxpwifi_sdio);\ndrivers/net/wireless/nxp/nxpwifi/sdio.c-2338-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723bs.c=44=static struct sdio_driver rtw_8723bs_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723bs.c-53-};\ndrivers/net/wireless/realtek/rtw88/rtw8723bs.c:54:module_sdio_driver(rtw_8723bs_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8723bs.c-55-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723cs.c=21=static struct sdio_driver rtw_8723cs_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723cs.c-29-\t}};\ndrivers/net/wireless/realtek/rtw88/rtw8723cs.c:30:module_sdio_driver(rtw_8723cs_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8723cs.c-31-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723ds.c=27=static struct sdio_driver rtw_8723ds_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8723ds.c-36-};\ndrivers/net/wireless/realtek/rtw88/rtw8723ds.c:37:module_sdio_driver(rtw_8723ds_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8723ds.c-38-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8821cs.c=22=static struct sdio_driver rtw_8821cs_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8821cs.c-31-};\ndrivers/net/wireless/realtek/rtw88/rtw8821cs.c:32:module_sdio_driver(rtw_8821cs_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8821cs.c-33-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8822bs.c=22=static struct sdio_driver rtw_8822bs_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8822bs.c-31-};\ndrivers/net/wireless/realtek/rtw88/rtw8822bs.c:32:module_sdio_driver(rtw_8822bs_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8822bs.c-33-\n--\ndrivers/net/wireless/realtek/rtw88/rtw8822cs.c=22=static struct sdio_driver rtw_8822cs_driver = {\n--\ndrivers/net/wireless/realtek/rtw88/rtw8822cs.c-31-};\ndrivers/net/wireless/realtek/rtw88/rtw8822cs.c:32:module_sdio_driver(rtw_8822cs_driver);\ndrivers/net/wireless/realtek/rtw88/rtw8822cs.c-33-\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c=1512=static struct sdio_driver rsi_driver = {\n--\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1523-};\ndrivers/net/wireless/rsi/rsi_91x_sdio.c:1524:module_sdio_driver(rsi_driver);\ndrivers/net/wireless/rsi/rsi_91x_sdio.c-1525-\n--\ndrivers/net/wireless/ti/wl1251/sdio.c=318=static struct sdio_driver wl1251_sdio_driver = {\n--\ndrivers/net/wireless/ti/wl1251/sdio.c-324-};\ndrivers/net/wireless/ti/wl1251/sdio.c:325:module_sdio_driver(wl1251_sdio_driver);\ndrivers/net/wireless/ti/wl1251/sdio.c-326-\n--\ndrivers/net/wireless/ti/wlcore/sdio.c=425=static struct sdio_driver wl1271_sdio_driver = {\n--\ndrivers/net/wireless/ti/wlcore/sdio.c-434-\ndrivers/net/wireless/ti/wlcore/sdio.c:435:module_sdio_driver(wl1271_sdio_driver);\ndrivers/net/wireless/ti/wlcore/sdio.c-436-\n--\ninclude/linux/mmc/sdio_func.h=114=extern void sdio_unregister_driver(struct sdio_driver *);\n--\ninclude/linux/mmc/sdio_func.h-116-/**\ninclude/linux/mmc/sdio_func.h:117: * module_sdio_driver() - Helper macro for registering a SDIO driver\ninclude/linux/mmc/sdio_func.h-118- * @__sdio_driver: sdio_driver struct\n--\ninclude/linux/mmc/sdio_func.h-123- */\ninclude/linux/mmc/sdio_func.h:124:#define module_sdio_driver(__sdio_driver) \\\ninclude/linux/mmc/sdio_func.h-125-\tmodule_driver(__sdio_driver, sdio_register_driver, \\\n"
} |
| 37/2 | 2026/11/03 00:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 28134 output: 49 thoughts: 1012 Thoughts: **Assessing the Fuzzing Worthiness of SDIO Driver Code** Okay, so I'm trying to figure out if it's worth fuzzing these SDIO drivers. My first thought is: can I even attach an SDIO device in QEMU? Specifically, are there emulated SDIO host controllers that can take SDIO devices? I know Linux has MMC host controllers like `sdhci-pci`, and QEMU does emulate `sdhci-pci`. But, the QEMU `sdhci` only attaches an `sd-card`, which is block storage. That won't do for SDIO. Right, so no native SDIO emulation in QEMU. Docs confirm this: No SDIO cards, just SD memory card emulation. There's some experimental SDIO stuff for Bluetooth on some ARM boards, but nothing for broadcom WiFi or RSI WiFi. Then the question becomes: how can I communicate with SDIO devices from userspace, even if they're not fully emulated? Is there a `/dev/raw-sdio` or something similar? Nope, nothing like that. Also, a quick check of syzkaller shows no SDIO descriptions or interfaces. Now, let's look at the fuzzing guidelines. Remember the negative criteria: Is this code structurally unreachable? Specifically, does it fall into one of the categories where fuzzing isn't worthwhile? That bullet point about "Structurally unreachable hardware" jumps out: vendor-specific PCIe switches, SmartNICs, GPU drivers requiring physical cards not emulated in standard QEMU. That's a good comparison. The rule is, fuzzing needs to be reachable in standard virtualized environments. It must be accessible via virtual buses like virtio, USB gadget, etc. Can the code in `brcm80211/brcmfmac/bcmsdh.c` and `rsi/rsi_91x_sdio.c` be reached through a virtual bus? Can either of these be accessed via USB gadget? Wait, *brcmfmac* has a `usb.c`! If `brcmfmac/usb.c` uses `bcmsdh.c`, then it could be reachable. I need to check for calls to `bcmsdh` or `brcmf_sdiod` within the `brcmfmac` directory. That's the next step to figure out reachability. |
| 38/2 | 2026/11/03 00:57 | tool | grepper |
0mArgs:{
"Expression": "brcmf_sdiod",
"PathPrefixes": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/"
]
}Results: {
"Output": "\nFull output is too long, showing 200 out of 950 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (4 files in total):\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:89\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c:3\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:128\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h:29\n\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-53-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:54:struct brcmf_sdiod_freezer {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-55-\tatomic_t freezing;\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-61-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:62:static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-63-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-81-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:82:static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-83-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-92-/* dummy handler for SDIO function 2 interrupt */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:93:static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-94-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-96-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:97:int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-98-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-110-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:111:\t\tret = request_irq(pdata-\u003eoob_irq_nr, brcmf_sdiod_oob_irqhandler,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-112-\t\t\t\t pdata-\u003eoob_irq_flags, \"brcmf_oob_intr\",\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-132-\t\t\taddr = CORE_CC_REG(addr, gpiocontrol);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:133:\t\t\tgpiocontrol = brcmf_sdiod_readl(sdiodev, addr, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-134-\t\t\tgpiocontrol |= 0x2;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:135:\t\t\tbrcmf_sdiod_writel(sdiodev, addr, gpiocontrol, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-136-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:137:\t\t\tbrcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_SELECT,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-138-\t\t\t\t\t 0xf, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:139:\t\t\tbrcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_OUT, 0, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:140:\t\t\tbrcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_EN, 0x2, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-141-\t\t}\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-143-\t\t/* must configure SDIO_CCCR_IENx to enable irq */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:144:\t\tdata = brcmf_sdiod_func0_rb(sdiodev, SDIO_CCCR_IENx, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-145-\t\tdata |= SDIO_CCCR_IEN_FUNC1 | SDIO_CCCR_IEN_FUNC2 |\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-146-\t\t\tSDIO_CCCR_IEN_FUNC0;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:147:\t\tbrcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_IENx, data, \u0026ret);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-148-\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-152-\t\t\tdata |= SDIO_CCCR_BRCM_SEPINT_ACT_HI;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:153:\t\tbrcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_SEPINT,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-154-\t\t\t\t data, \u0026ret);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-158-\t\tsdio_claim_host(sdiodev-\u003efunc1);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:159:\t\tsdio_claim_irq(sdiodev-\u003efunc1, brcmf_sdiod_ib_irqhandler);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:160:\t\tsdio_claim_irq(sdiodev-\u003efunc2, brcmf_sdiod_dummy_irqhandler);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-161-\t\tsdio_release_host(sdiodev-\u003efunc1);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-167-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:168:void brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-169-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-179-\t\tsdio_claim_host(sdiodev-\u003efunc1);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:180:\t\tbrcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:181:\t\tbrcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_IENx, 0, NULL);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-182-\t\tsdio_release_host(sdiodev-\u003efunc1);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-198-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:199:void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:200:\t\t\t enum brcmf_sdiod_state state)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-201-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-222-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:223:static int brcmf_sdiod_set_backplane_window(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-224-\t\t\t\t\t u32 addr)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-234-\tfor (i = 0 ; i \u003c 3 \u0026\u0026 !err ; i++, v \u003e\u003e= 8)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:235:\t\tbrcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-236-\t\t\t\t v \u0026 0xff, \u0026err);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-243-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:244:u32 brcmf_sdiod_readl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-245-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-248-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:249:\tretval = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-250-\tif (retval)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-264-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:265:void brcmf_sdiod_writel(struct brcmf_sdio_dev *sdiodev, u32 addr,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-266-\t\t\tu32 data, int *ret)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-269-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:270:\tretval = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-271-\tif (retval)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-283-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:284:static int brcmf_sdiod_skbuff_read(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-285-\t\t\t\t struct sdio_func *func, u32 addr,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-309-\tif (err == -ENOMEDIUM)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:310:\t\tbrcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-311-\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-314-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:315:static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-316-\t\t\t\t struct sdio_func *func, u32 addr,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-331-\tif (err == -ENOMEDIUM)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:332:\t\tbrcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-333-\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=337=static int mmc_submit_one(struct mmc_data *md, struct mmc_request *mr,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-357-\tif (ret == -ENOMEDIUM) {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:358:\t\tbrcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-359-\t} else if (ret != 0) {\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-368-/**\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:369: * brcmf_sdiod_sglist_rw - SDIO interface function for block data access\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-370- * @sdiodev: brcmfmac sdio device\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-379- */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:380:static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-381-\t\t\t\t struct sdio_func *func,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-526-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:527:int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-528-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-538-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:539:\terr = brcmf_sdiod_recv_pkt(sdiodev, mypkt);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-540-\tif (!err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-546-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:547:int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-548-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-553-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:554:\terr = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-555-\tif (err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-560-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:561:\terr = brcmf_sdiod_skbuff_read(sdiodev, sdiodev-\u003efunc2, addr, pkt);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-562-\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-566-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:567:int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-568-\t\t\t struct sk_buff_head *pktq, uint totlen)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-577-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:578:\terr = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-579-\tif (err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-585-\tif (pktq-\u003eqlen == 1)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:586:\t\terr = brcmf_sdiod_skbuff_read(sdiodev, sdiodev-\u003efunc2, addr,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-587-\t\t\t\t\t __skb_peek(pktq));\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-591-\t\t\treturn -ENOMEM;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:592:\t\terr = brcmf_sdiod_skbuff_read(sdiodev, sdiodev-\u003efunc2, addr,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-593-\t\t\t\t\t glom_skb);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-601-\t} else\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:602:\t\terr = brcmf_sdiod_sglist_rw(sdiodev, sdiodev-\u003efunc2, false,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-603-\t\t\t\t\t addr, pktq);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-609-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:610:int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-611-{\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-625-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:626:\terr = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-627-\tif (err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-632-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:633:\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc2, addr, mypkt);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-634-out:\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-639-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:640:int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-641-\t\t\t struct sk_buff_head *pktq)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-648-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:649:\terr = brcmf_sdiod_set_backplane_window(sdiodev, addr);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-650-\tif (err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-657-\t\tskb_queue_walk(pktq, skb) {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:658:\t\t\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc2,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-659-\t\t\t\t\t\t addr, skb);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-663-\t} else {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:664:\t\terr = brcmf_sdiod_sglist_rw(sdiodev, sdiodev-\u003efunc2, true,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-665-\t\t\t\t\t addr, pktq);\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=671=int\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:672:brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-673-\t\t u8 *data, uint size)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-699-\t\t/* Set the backplane window to include the start address */\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:700:\t\terr = brcmf_sdiod_set_backplane_window(sdiodev, address);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-701-\t\tif (err)\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-714-\t\t\tmemcpy(pkt-\u003edata, data, dsize);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:715:\t\t\terr = brcmf_sdiod_skbuff_write(sdiodev, sdiodev-\u003efunc1,\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-716-\t\t\t\t\t\t sdaddr, pkt);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-717-\t\t} else {\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:718:\t\t\terr = brcmf_sdiod_skbuff_read(sdiodev, sdiodev-\u003efunc1,\n\n"
} |
| 39/2 | 2026/11/03 00:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 37188 output: 52 thoughts: 71 Thoughts: Here's my analysis of the provided code snippet: **Code Analysis: Tracing Function Calls** Okay, so `bcmsdh.c` has a very specific call structure – it's only invoked from within `sdio.c`. This suggests a dedicated, perhaps low-level, interaction happening between those two modules. Now, I need to understand what's calling `bcmsdh.c` in the context of the larger system. So, I need to check `common.c`. I'm going to look at `drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c`, specifically. The goal is to see which functions, variables, or data structures within `common.c` reference `bcmsdh.c` or its associated structures and functions. This will help determine how it's being used by other modules. I need to see what the matches are, and understand the flow of data or control. |
| 40/2 | 2026/11/03 00:57 | tool | grepper |
0mArgs:{
"Expression": "brcmf_sdio",
"PathPrefixes": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c"
]
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c=26=MODULE_LICENSE(\"Dual BSD/GPL\");\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c-35-\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c:36:static int brcmf_sdiod_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c:37:module_param_named(txglomsz, brcmf_sdiod_txglomsz, int, 0);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c-38-MODULE_PARM_DESC(txglomsz, \"Maximum tx packet chain size [SDIO]\");\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c=512=struct brcmf_mp_device *brcmf_get_module_param(struct device *dev,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c-537-\tif (bus_type == BRCMF_BUSTYPE_SDIO)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c:538:\t\tsettings-\u003ebus.sdio.txglomsz = brcmf_sdiod_txglomsz;\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c-539-\n"
} |
| 41/2 | 2026/11/03 00:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 37963 output: 28 thoughts: 224 Thoughts: **SDIO Hardware Implementations and Virtualization** Okay, so `bcmsdh.c` handles the Broadcom SDIO WiFi cards, specifically the `brcmf_sdmmc_driver`, and `rsi_91x_sdio.c` manages the Redpine 91x SDIO WiFi cards via the `rsi_driver`. Straightforward enough: hardware-specific SDIO bus implementations. Now, the real question is, can I even *test* these in a standard virtual environment like GCE or QEMU? Hmm, neither of them emulates or provides hardware-level support for those specific Broadcom or Redpine SDIO cards. So, are we completely out of luck? Is there *any* user-space accessible or virtual bus I could leverage? I need to explore whether Linux has some sort of virtual SDIO bus, driver, gadget, or maybe even a mock implementation. I should look into things like a "dummy_mmc," a "dummy_sdio," or even something like "vhci" but for SDIO. I think I will search the drivers/mmc directory, looking for anything with "dummy", "virtual", or "mock" in the filenames. |
| 42/2 | 2026/11/03 00:57 | tool | grepper |
0mArgs:{
"Expression": "mock|virtual",
"PathPrefixes": [
"drivers/mmc"
]
}Results: {
"Output": "drivers/mmc/host/renesas_sdhi_core.c=1055=int renesas_sdhi_probe(struct platform_device *pdev,\n--\ndrivers/mmc/host/renesas_sdhi_core.c-1102-\t * to the card detect circuit. That leaves us with if separate clocks\ndrivers/mmc/host/renesas_sdhi_core.c:1103:\t * are presented, we must treat them both as virtually 1 clock.\ndrivers/mmc/host/renesas_sdhi_core.c-1104-\t */\n--\ndrivers/mmc/host/usdhi6rol0.c=272=static int usdhi6_error_code(struct usdhi6_host *host)\n--\ndrivers/mmc/host/usdhi6rol0.c-309- * In PIO mode we have to map each page separately, using kmap(). That way\ndrivers/mmc/host/usdhi6rol0.c:310: * adjacent pages are mapped to non-adjacent virtual addresses. That's why we\ndrivers/mmc/host/usdhi6rol0.c-311- * have to use a bounce buffer for blocks, crossing page boundaries. Such blocks\n"
} |
| 43/2 | 2026/11/03 00:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 38782 output: 39 thoughts: 1560 Thoughts: **SDIO Driver Reachability Analysis** Okay, so the initial thought is, there's no virtual MMC host directly available to instantiate these SDIO drivers. Specifically, I'm thinking about the MMC host. I quickly jump to the `CONFIG_MMC_TEST` option, but it's a dead end – `mmc_test` is just for testing MMC/SD card *drivers* acting as an MMC card, and *requires* a physical or emulated MMC host. It's not suitable for SDIO testing, which is my goal. Furthermore it doesn't even test SDIO functionality. I then consider `sdio_uart`, which is an SDIO card driver, but that's just a specific example. What about SDIO devices in general? That's what I really need to understand. An SDIO device is a peripheral connected over an SD interface – an SDIO function. The key is how these SDIO drivers, `rsi_probe()` or `brcmf_sdio_probe()`, actually get *called*. It only happens when an SDIO card is *detected*, matching vendor and device IDs. For `brcmfmac`, that's via `sdio_register_driver(&brcmf_sdmmc_driver)` and a specific `sdio_device_id` table within `bcmsdh.c` that hardcodes Broadcom vendor/device IDs. Similarly, for RSI, it's `module_sdio_driver(rsi_driver)` and another `sdio_device_id` table in `rsi_91x_sdio.c`, with Redpine vendor/device IDs. So, the crucial question is: Can I emulate these SDIO cards with QEMU? No. QEMU does not have emulation for BCM43xx SDIO or Redpine SDIO cards. What about GCE? Nope. GCE virtual machines (KVM) have no SDIO slots and no SDIO cards. Alright, is there *any* other way these SDIO drivers could get instantiated? Could Device Tree (OF) or ACPI probe them? Even with those, SDIO devices still need the SDIO card to respond to initialization commands (CMD5 etc.) to enumerate functions on the SDIO bus. And without *physical* hardware or a QEMU device model, there's no SDIO card to respond. The SDIO card must respond as the SDIO function. Furthermore, on amd64 (my target architecture), PCs and servers don't even *use* SDIO WiFi; that's primarily on ARM SBCs, embedded systems, tablets, and phones. Even on ARM, QEMU lacks emulation for BCM43xx or RSI SDIO devices. Let's double-check the "structurally unreachable hardware" section to confirm this reasoning. It's clear: vendor-specific PCIe switches, SmartNICs, GPU drivers (like those requiring physical ASICs) that are not emulated in standard QEMU are unreachable. The fuzzing gate is reachability; fuzzing is only viable for code *executed* in virtualized environments like GCE or QEMU using software-emulated devices like USB gadgets, netdev, and tun/tap. Given that the code I'm dealing with requires physical SDIO cards that aren't emulated and isn't a common architecture for the target machine, it seems I need to move on; it MUST NOT be fuzzed. The driver code is unreachable. Let's check the patch itself. It seems the patch is adding padding: - `brcmf_sdiod_skbuff_write`: adds padding to ensure data is a multiple of 4 bytes. - `rsi_sdio_host_intf_write_pkt`: similar padding for the length to be a multiple of `block_size`. Let's search commit messages in the git log and kernel history to understand the reasoning. |
| 44/2 | 2026/11/03 00:58 | tool | grepper |
0mArgs:{
"Expression": "memset\\(skb-\u003edata \\+ skb-\u003elen",
"PathPrefixes": [
"drivers/net/wireless/"
]
}Results: {
"Output": "drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=315=static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev,\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-326-\tif (req_sz \u003e skb-\u003elen)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:327:\t\tmemset(skb-\u003edata + skb-\u003elen, 0, req_sz - skb-\u003elen);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-328-\n"
} |
| 45/2 | 2026/11/03 00:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 41433 output: 154 thoughts: 421 Thoughts: **Triage Conclusion: Code Unreachable for Fuzzing** Okay, let's break this down. My initial assessment is that this patch, while seemingly important for security (preventing information leaks via padding bytes in SDIO transfers), unfortunately isn't relevant for standard fuzzing efforts. I've got a good grasp on the problem and the rationale here. The patch itself targets two functions: `brcmf_sdiod_skbuff_write` and `rsi_sdio_host_intf_write_pkt`. Both of these are specific SDIO bus transfer functions – one using `sdio_memcpy_toio` and the other leveraging `rsi_sdio_write_register_multiple`. These aren't generic; they are directly tied to the Broadcom and Redpine Signals SDIO WiFi hardware. Here's the rub: those SDIO devices are *hardware*, not software. They cannot be emulated or simulated within the typical QEMU or GCE virtualized environments that we use for fuzzing amd64 systems. There's no virtual bus or software emulation layer to stand in for the actual SDIO cards. So, while the patch's intentions are good, from a fuzzing perspective, the code is structurally unreachable. It just won't be triggered during standard fuzzing iterations because the underlying hardware is absent. Therefore, since the modified code is completely unreachable in our fuzzing environments, I am marking this as not-worth-fuzzing. I see no value in targeting this patch with our current setup. I've verified this thoroughly. No further investigation is necessary. I will set the results accordingly. |
| 46/2 | 2026/11/03 00:58 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The changes in this patch series modify SDIO bus-specific packet transmission functions: brcmf_sdiod_skbuff_write in the Broadcom brcmfmac SDIO driver and rsi_sdio_host_intf_write_pkt in the Redpine Signals 91x SDIO driver. Both drivers require physical vendor-specific SDIO wireless hardware that is not emulated in standard QEMU or GCE virtualized environments. Because there is no virtual bus or emulation interface to instantiate these SDIO devices, the modified code is structurally unreachable for syzkaller fuzzing.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The changes in this patch series modify SDIO bus-specific packet transmission functions: brcmf_sdiod_skbuff_write in the Broadcom brcmfmac SDIO driver and rsi_sdio_host_intf_write_pkt in the Redpine Signals 91x SDIO driver. Both drivers require physical vendor-specific SDIO wireless hardware that is not emulated in standard QEMU or GCE virtualized environments. Because there is no virtual bus or emulation interface to instantiate these SDIO devices, the modified code is structurally unreachable for syzkaller fuzzing.",
"WorthFuzzing": false
} |
| 47/1 | 2026/11/03 00:58 | action | If |
0mArgs:{
"WorthFuzzing": false
}Results: null |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|