AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/09/23 03:43	flow	patch-triage	2m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "KMSANReasoning": "", "NeedsKMSAN": false, "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.", "WorthFuzzing": false }
1/1	2026/09/23 03:43	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 9b58714bd32c27ef1a2d65f52db2227923e199eb\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Wed Sep 23 03:43:01 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c\nindex 4728f62a15578..70e95b07ca2a1 100644\n--- a/drivers/staging/rtl8723bs/core/rtw_ap.c\n+++ b/drivers/staging/rtl8723bs/core/rtw_ap.c\n@@ -771,7 +771,7 @@ int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len)\n \tif (!check_fwstate(pmlmepriv, WIFI_AP_STATE))\n \t\treturn _FAIL;\n \n-\tif (len \u003c 0 \|\| len \u003e MAX_IE_SZ)\n+\tif (len \u003c _BEACON_IE_OFFSET_ \|\| len \u003e MAX_IE_SZ)\n \t\treturn _FAIL;\n \n \tpbss_network-\u003eie_length = len;\n@@ -885,61 +885,46 @@ int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len)\n \tgroup_cipher = 0; pairwise_cipher = 0;\n \tpsecuritypriv-\u003ewpa_group_cipher = _NO_PRIVACY_;\n \tpsecuritypriv-\u003ewpa_pairwise_cipher = _NO_PRIVACY_;\n-\tfor (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {\n-\t\tp = rtw_get_ie(p,\n-\t\t\t WLAN_EID_VENDOR_SPECIFIC,\n-\t\t\t \u0026ie_len,\n-\t\t\t (pbss_network-\u003eie_length - _BEACON_IE_OFFSET_ - (ie_len + 2)));\n-\t\tif ((p) \u0026\u0026 (!memcmp(p + 2, OUI1, 4))) {\n-\t\t\tif (rtw_parse_wpa_ie(p,\n-\t\t\t\t\t ie_len + 2,\n-\t\t\t\t\t \u0026group_cipher,\n-\t\t\t\t\t \u0026pairwise_cipher,\n-\t\t\t\t\t NULL) == _SUCCESS) {\n-\t\t\t\tpsecuritypriv-\u003edot11_auth_algrthm = dot11_auth_algrthm_8021x;\n-\n-\t\t\t\tpsecuritypriv-\u003edot8021xalg = 1;/* psk, todo:802.1x /\n-\n-\t\t\t\tpsecuritypriv-\u003ewpa_psk \|= BIT(0);\n-\n-\t\t\t\tpsecuritypriv-\u003ewpa_group_cipher = group_cipher;\n-\t\t\t\tpsecuritypriv-\u003ewpa_pairwise_cipher = pairwise_cipher;\n-\t\t\t}\n+\tp = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,\n+\t\t\t pbss_network-\u003eie_length - _BEACON_IE_OFFSET_,\n+\t\t\t WLAN_EID_VENDOR_SPECIFIC,\n+\t\t\t OUI1, sizeof(OUI1), NULL, \u0026ie_len);\n+\tif (p) {\n+\t\tif (rtw_parse_wpa_ie(p,\n+\t\t\t\t ie_len,\n+\t\t\t\t \u0026group_cipher,\n+\t\t\t\t \u0026pairwise_cipher,\n+\t\t\t\t NULL) == _SUCCESS) {\n+\t\t\tpsecuritypriv-\u003edot11_auth_algrthm = dot11_auth_algrthm_8021x;\n \n-\t\t\tbreak;\n-\t\t}\n+\t\t\tpsecuritypriv-\u003edot8021xalg = 1;/ psk, todo:802.1x /\n \n-\t\tif (!p \|\| ie_len == 0)\n-\t\t\tbreak;\n+\t\t\tpsecuritypriv-\u003ewpa_psk \|= BIT(0);\n+\n+\t\t\tpsecuritypriv-\u003ewpa_group_cipher = group_cipher;\n+\t\t\tpsecuritypriv-\u003ewpa_pairwise_cipher = pairwise_cipher;\n+\t\t}\n \t}\n \n \t/ wmm /\n \tie_len = 0;\n \tpmlmepriv-\u003eqospriv.qos_option = 0;\n \tif (pregistrypriv-\u003ewmm_enable) {\n-\t\tfor (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {\n-\t\t\tp = rtw_get_ie(p,\n-\t\t\t\t WLAN_EID_VENDOR_SPECIFIC,\n-\t\t\t\t \u0026ie_len,\n-\t\t\t\t (pbss_network-\u003eie_length -\n-\t\t\t\t\t_BEACON_IE_OFFSET_ - (ie_len + 2)));\n-\t\t\tif ((p) \u0026\u0026 !memcmp(p + 2, WMM_PARA_IE, 6)) {\n-\t\t\t\tpmlmepriv-\u003eqospriv.qos_option = 1;\n-\n-\t\t\t\t(p + 8) \|= BIT(7);/* QoS Info, support U-APSD /\n-\n-\t\t\t\t/ disable all ACM bits since the WMM admission /\n-\t\t\t\t/ control is not supported /\n-\t\t\t\t(p + 10) \u0026= ~BIT(4); /* BE /\n-\t\t\t\t(p + 14) \u0026= ~BIT(4); /* BK /\n-\t\t\t\t(p + 18) \u0026= ~BIT(4); /* VI /\n-\t\t\t\t(p + 22) \u0026= ~BIT(4); /* VO /\n-\n-\t\t\t\tbreak;\n-\t\t\t}\n-\n-\t\t\tif (!p \|\| ie_len == 0)\n-\t\t\t\tbreak;\n+\t\tp = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,\n+\t\t\t\t pbss_network-\u003eie_length - _BEACON_IE_OFFSET_,\n+\t\t\t\t WLAN_EID_VENDOR_SPECIFIC,\n+\t\t\t\t WMM_PARA_IE, sizeof(WMM_PARA_IE), NULL, \u0026ie_len);\n+\t\tif (p \u0026\u0026 ie_len \u003e= WLAN_WMM_LEN + 2) {\n+\t\t\tpmlmepriv-\u003eqospriv.qos_option = 1;\n+\n+\t\t\t(p + 8) \|= BIT(7);/* QoS Info, support U-APSD /\n+\n+\t\t\t/ disable all ACM bits since the WMM admission /\n+\t\t\t/ control is not supported /\n+\t\t\t(p + 10) \u0026= ~BIT(4); /* BE /\n+\t\t\t(p + 14) \u0026= ~BIT(4); /* BK /\n+\t\t\t(p + 18) \u0026= ~BIT(4); /* VI /\n+\t\t\t(p + 22) \u0026= ~BIT(4); /* VO */\n \t\t}\n \t}\n \n" }
2/1	2026/09/23 03:43	agent	patch-evaluator	2m Model: core Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.", "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 9b58714bd32c27ef1a2d65f52db2227923e199eb Author: syz-cluster <triage@syzkaller.com> Date: Wed Sep 23 03:43:01 2026 +0000 syz-cluster: applied patch under review diff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c index 4728f62a15578..70e95b07ca2a1 100644 --- a/drivers/staging/rtl8723bs/core/rtw_ap.c +++ b/drivers/staging/rtl8723bs/core/rtw_ap.c @@ -771,7 +771,7 @@ int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len) if (!check_fwstate(pmlmepriv, WIFI_AP_STATE)) return _FAIL; - if (len < 0 \|\| len > MAX_IE_SZ) + if (len < _BEACON_IE_OFFSET_ \|\| len > MAX_IE_SZ) return _FAIL; pbss_network->ie_length = len; @@ -885,61 +885,46 @@ int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len) group_cipher = 0; pairwise_cipher = 0; psecuritypriv->wpa_group_cipher = _NO_PRIVACY_; psecuritypriv->wpa_pairwise_cipher = _NO_PRIVACY_; - for (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) { - p = rtw_get_ie(p, - WLAN_EID_VENDOR_SPECIFIC, - &ie_len, - (pbss_network->ie_length - _BEACON_IE_OFFSET_ - (ie_len + 2))); - if ((p) && (!memcmp(p + 2, OUI1, 4))) { - if (rtw_parse_wpa_ie(p, - ie_len + 2, - &group_cipher, - &pairwise_cipher, - NULL) == _SUCCESS) { - psecuritypriv->dot11_auth_algrthm = dot11_auth_algrthm_8021x; - - psecuritypriv->dot8021xalg = 1;/* psk, todo:802.1x / - - psecuritypriv->wpa_psk \|= BIT(0); - - psecuritypriv->wpa_group_cipher = group_cipher; - psecuritypriv->wpa_pairwise_cipher = pairwise_cipher; - } + p = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_, + pbss_network->ie_length - _BEACON_IE_OFFSET_, + WLAN_EID_VENDOR_SPECIFIC, + OUI1, sizeof(OUI1), NULL, &ie_len); + if (p) { + if (rtw_parse_wpa_ie(p, + ie_len, + &group_cipher, + &pairwise_cipher, + NULL) == _SUCCESS) { + psecuritypriv->dot11_auth_algrthm = dot11_auth_algrthm_8021x; - break; - } + psecuritypriv->dot8021xalg = 1;/ psk, todo:802.1x / - if (!p \|\| ie_len == 0) - break; + psecuritypriv->wpa_psk \|= BIT(0); + + psecuritypriv->wpa_group_cipher = group_cipher; + psecuritypriv->wpa_pairwise_cipher = pairwise_cipher; + } } / wmm / ie_len = 0; pmlmepriv->qospriv.qos_option = 0; if (pregistrypriv->wmm_enable) { - for (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) { - p = rtw_get_ie(p, - WLAN_EID_VENDOR_SPECIFIC, - &ie_len, - (pbss_network->ie_length - - _BEACON_IE_OFFSET_ - (ie_len + 2))); - if ((p) && !memcmp(p + 2, WMM_PARA_IE, 6)) { - pmlmepriv->qospriv.qos_option = 1; - - (p + 8) \|= BIT(7);/* QoS Info, support U-APSD / - - / disable all ACM bits since the WMM admission / - / control is not supported / - (p + 10) &= ~BIT(4); /* BE / - (p + 14) &= ~BIT(4); /* BK / - (p + 18) &= ~BIT(4); /* VI / - (p + 22) &= ~BIT(4); /* VO / - - break; - } - - if (!p \|\| ie_len == 0) - break; + p = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_, + pbss_network->ie_length - _BEACON_IE_OFFSET_, + WLAN_EID_VENDOR_SPECIFIC, + WMM_PARA_IE, sizeof(WMM_PARA_IE), NULL, &ie_len); + if (p && ie_len >= WLAN_WMM_LEN + 2) { + pmlmepriv->qospriv.qos_option = 1; + + (p + 8) \|= BIT(7);/* QoS Info, support U-APSD / + + / disable all ACM bits since the WMM admission / + / control is not supported / + (p + 10) &= ~BIT(4); /* BE / + (p + 14) &= ~BIT(4); /* BK / + (p + 18) &= ~BIT(4); /* VI / + (p + 22) &= ~BIT(4); /* VO */ } }
3/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 4266 output: 37 thoughts: 206 Thoughts: Fuzzing Triage: RTL8723bs Driver Patch Evaluation Okay, so I've got this patch series in front of me and the question is whether it's worth fuzzing with syzkaller. First things first, let's establish some basic safety. This is just a standard code review/fuzzing triage task; nothing that jumps out as malicious or exploit-related. Good. Benign. Now, let's dive into the diff. The patch seems to be touching `drivers/staging/rtl8723bs/core/rtw_ap.c`. And specifically, a function called `rtw_check_beacon_data`. Right, sounds like a good place to start digging for potential issues. Wait a second… `rtl8723bs`? My mind immediately goes to the driver itself. Is this an SDIO WiFi driver? I should quickly confirm what this driver is. Let me search the codebase for that exact string. Alright, let's double-check the Kconfig and see what's in `drivers/staging/rtl8723bs`. That will give me a better understanding of what kind of hardware this is intended for and the context of the code. This is a critical step before making a judgement call.
4/2	2026/09/23 03:43	tool	grepper	0m Args: { "Expression": "RTL8723BS", "PathPrefix": "drivers/staging/rtl8723bs" } Results: { "Output": "drivers/staging/rtl8723bs/Kconfig-1-# SPDX-License-Identifier: GPL-2.0\ndrivers/staging/rtl8723bs/Kconfig:2:config RTL8723BS\ndrivers/staging/rtl8723bs/Kconfig:3:\ttristate \"Realtek RTL8723BS SDIO Wireless LAN NIC driver\"\ndrivers/staging/rtl8723bs/Kconfig-4-\tdepends on WLAN \u0026\u0026 MMC \u0026\u0026 CFG80211\n--\ndrivers/staging/rtl8723bs/Kconfig-9-\thelp\ndrivers/staging/rtl8723bs/Kconfig:10:\tThis option enables support for RTL8723BS SDIO drivers, such as\ndrivers/staging/rtl8723bs/Kconfig-11-\tthe wifi found on the 1st gen Intel Compute Stick, the CHIP\n--\ndrivers/staging/rtl8723bs/Makefile=2=r8723bs-y = \\\n--\ndrivers/staging/rtl8723bs/Makefile-57-\ndrivers/staging/rtl8723bs/Makefile:58:obj-$(CONFIG_RTL8723BS) := r8723bs.o\ndrivers/staging/rtl8723bs/Makefile-59-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=561=u32 rtl8723bs_hal_init(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-806-/ /\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:807:static void CardDisableRTL8723BSdio(struct adapter padapter)\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-808-{\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=853=u32 rtl8723bs_hal_deinit(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-892-\t\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:893:\t\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-894-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-898-\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:899:\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-900-\t\t}\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=1053=static s32 _ReadAdapterInfo8723BS(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1075-\t\t /\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:1076:\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1077-\t}\n--\ndrivers/staging/rtl8723bs/include/hal_pg.h-42-\ndrivers/staging/rtl8723bs/include/hal_pg.h:43:/ RTL8723BS */\ndrivers/staging/rtl8723bs/include/hal_pg.h-44-#define\tEEPROM_MAC_ADDR_8723BS\t\t\t0x11A\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=463=module_exit(rtw_drv_halt);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-464-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:465:MODULE_DESCRIPTION(\"Realtek RTL8723BS SDIO WiFi driver\");\n" }
5/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 5871 output: 48 thoughts: 299 Thoughts: RTL8723BS Driver Reachability Analysis Okay, so the RTL8723BS is an SDIO Wireless LAN NIC driver. The dependencies are `WLAN`, `MMC`, and `CFG80211`. My immediate thought is, "Can I even get at this thing in syzkaller or a standard virtualized environment like GCE or QEMU?" I need to figure out if it's reachable. The document emphasizes reachability as the key factor. If the code's structurally unreachable in standard virtualized environments, it's a no-go for fuzzing, no matter how tempting it seems. Section 2 highlights the "negative criteria," specifically mentioning structurally unreachable hardware. We're talking about things like vendor-specific PCIe switches or SmartNICs, the ones that need physical ASIC/PCIe cards that QEMU doesn't emulate. Now, the question is: how is the RTL8723BS probed? Is it through SDIO? And crucially, can SDIO be emulated or probed? Or does this require physical SDIO hardware? I need to dig into the driver's implementation. Let's see...I should look into `drivers/staging/rtl8723bs/os_dep/sdio_intf.c` to understand how it interacts with the SDIO interface. That will tell the tale.
6/2	2026/09/23 03:43	tool	read-file	0m Args: { "File": "drivers/staging/rtl8723bs/os_dep/sdio_intf.c", "FirstLine": 1, "LineCount": 80 } Results: { "Contents": " 1:\t// SPDX-License-Identifier: GPL-2.0\n 2:\t/*****************************************************************************\n 3:\t \n 4:\t * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.\n 5:\t \n 6:\t ****************************************************************************/\n 7:\t#include \u003cdrv_types.h\u003e\n 8:\t#include \u003chal_btcoex.h\u003e\n 9:\t#include \u003chal_data.h\u003e\n 10:\t#include \u003clinux/jiffies.h\u003e\n 11:\t\n 12:\t#ifndef dev_to_sdio_func\n 13:\t#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)\n 14:\t#endif\n 15:\t\n 16:\tstatic const struct sdio_device_id sdio_ids[] = {\n 17:\t\t{ SDIO_DEVICE(0x024c, 0x0523), },\n 18:\t\t{ SDIO_DEVICE(0x024c, 0x0525), },\n 19:\t\t{ SDIO_DEVICE(0x024c, 0x0623), },\n 20:\t\t{ SDIO_DEVICE(0x024c, 0x0626), },\n 21:\t\t{ SDIO_DEVICE(0x024c, 0x0627), },\n 22:\t\t{ SDIO_DEVICE(0x024c, 0xb723), },\n 23:\t\t{ / end: all zeroes /\t\t\t\t},\n 24:\t};\n 25:\tMODULE_DEVICE_TABLE(sdio, sdio_ids);\n 26:\t\n 27:\tstatic int rtw_drv_init(struct sdio_func func, const struct sdio_device_id id);\n 28:\tstatic void rtw_dev_remove(struct sdio_func func);\n 29:\tstatic int rtw_sdio_resume(struct device dev);\n 30:\tstatic int rtw_sdio_suspend(struct device dev);\n 31:\t\n 32:\tstatic const struct dev_pm_ops rtw_sdio_pm_ops = {\n 33:\t\t.suspend\t= rtw_sdio_suspend,\n 34:\t\t.resume\t= rtw_sdio_resume,\n 35:\t};\n 36:\t\n 37:\tstatic struct sdio_driver rtl8723bs_sdio_driver = {\n 38:\t\t.probe = rtw_drv_init,\n 39:\t\t.remove = rtw_dev_remove,\n 40:\t\t.name = \"rtl8723bs\",\n 41:\t\t.id_table = sdio_ids,\n 42:\t\t.drv = {\n 43:\t\t\t.pm = \u0026rtw_sdio_pm_ops,\n 44:\t\t}\n 45:\t};\n 46:\t\n 47:\tstatic void sd_sync_int_hdl(struct sdio_func func)\n 48:\t{\n 49:\t\tstruct dvobj_priv psdpriv;\n 50:\t\n 51:\t\n 52:\t\tpsdpriv = sdio_get_drvdata(func);\n 53:\t\n 54:\t\tif (!psdpriv-\u003eif1)\n 55:\t\t\treturn;\n 56:\t\n 57:\t\trtw_sdio_set_irq_thd(psdpriv, current);\n 58:\t\tsd_int_hdl(psdpriv-\u003eif1);\n 59:\t\trtw_sdio_set_irq_thd(psdpriv, NULL);\n 60:\t}\n 61:\t\n 62:\tstatic int sdio_alloc_irq(struct dvobj_priv dvobj)\n 63:\t{\n 64:\t\tstruct sdio_data psdio_data;\n 65:\t\tstruct sdio_func *func;\n 66:\t\tint err;\n 67:\t\n 68:\t\tpsdio_data = \u0026dvobj-\u003eintf_data;\n 69:\t\tfunc = psdio_data-\u003efunc;\n 70:\t\n 71:\t\tsdio_claim_host(func);\n 72:\t\n 73:\t\terr = sdio_claim_irq(func, \u0026sd_sync_int_hdl);\n 74:\t\tif (err)\n 75:\t\t\tnetdev_crit(dvobj-\u003eif1-\u003epnetdev, \"%s: sdio_claim_irq FAIL(%d)!\\n\", __func__, err);\n 76:\t\telse\n 77:\t\t\tdvobj-\u003eirq_alloc = 1;\n 78:\t\n 79:\t\tsdio_release_host(func);\n 80:\t\n" }
7/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 7770 output: 20 thoughts: 197 Thoughts: SDIO Driver Inquiry Okay, so I'm looking at this `sdio_driver rtl8723bs_sdio_driver` and the first question that pops into my head is, can I even instantiate an SDIO driver like this in a virtualized environment like GCE or with QEMU, especially within a syzkaller context? My intuition is screaming that SDIO requires physical hardware, but I need to be sure. I'm immediately wondering if syzkaller has any built-in SDIO emulation. Right, of course, syzkaller primarily leverages standard QEMU or GCE instances. It handles virtual buses through mechanisms I'm familiar with – dummy_hcd for USB, netdev/tun/tap, virtio, loopback, netlink, binder, sockets, and so on. SDIO isn't directly in that list, though. Okay, so if it's not directly supported, could I possibly fake it? Maybe emulate an SDIO device over USB or something similar, connecting through something I do have? No, hold on. SDIO is tied to the MMC/SDIO bus. It's fundamentally different. Alright, so if I can't emulate it directly, what about creating SDIO cards from userspace? Can I make a virtual SDIO host/device? Does the Linux kernel even have facilities for something like that? It's time to dig into the kernel source. I'll search for things like `sdio_device`, `sdio_driver`, or anything that mentions "mock SDIO" to see if there's any existing support or a basis for virtualizing this bus.
8/2	2026/09/23 03:43	tool	grepper	0m Args: { "Expression": "sdio_register_driver" } Results: { "Output": "drivers/bluetooth/btmrvl_sdio.c=1745=static int __init btmrvl_sdio_init_module(void)\ndrivers/bluetooth/btmrvl_sdio.c-1746-{\ndrivers/bluetooth/btmrvl_sdio.c:1747:\tif (sdio_register_driver(\u0026bt_mrvl_sdio) != 0) {\ndrivers/bluetooth/btmrvl_sdio.c-1748-\t\tBT_ERR(\"SDIO Driver Registration Failed\");\n--\ndrivers/mmc/core/sdio_bus.c=274=static void sdio_legacy_shutdown(struct sdio_func func)\n--\ndrivers/mmc/core/sdio_bus.c-282-/\ndrivers/mmc/core/sdio_bus.c:283: \t__sdio_register_driver - register a function driver\ndrivers/mmc/core/sdio_bus.c-284- \t@drv: SDIO function driver\n--\ndrivers/mmc/core/sdio_bus.c-286- /\ndrivers/mmc/core/sdio_bus.c:287:int __sdio_register_driver(struct sdio_driver drv, struct module owner)\ndrivers/mmc/core/sdio_bus.c-288-{\n--\ndrivers/mmc/core/sdio_bus.c-301-}\ndrivers/mmc/core/sdio_bus.c:302:EXPORT_SYMBOL_GPL(__sdio_register_driver);\ndrivers/mmc/core/sdio_bus.c-303-\n--\ndrivers/mmc/core/sdio_uart.c=1118=static int __init sdio_uart_init(void)\n--\ndrivers/mmc/core/sdio_uart.c-1143-\ndrivers/mmc/core/sdio_uart.c:1144:\tret = sdio_register_driver(\u0026sdio_uart_driver);\ndrivers/mmc/core/sdio_uart.c-1145-\tif (ret)\n--\ndrivers/net/wireless/broadcom/b43/sdio.c=195=int b43_sdio_init(void)\ndrivers/net/wireless/broadcom/b43/sdio.c-196-{\ndrivers/net/wireless/broadcom/b43/sdio.c:197:\treturn sdio_register_driver(\u0026b43_sdio_driver);\ndrivers/net/wireless/broadcom/b43/sdio.c-198-}\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=1271=int brcmf_sdio_register(void)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1272-{\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:1273:\treturn sdio_register_driver(\u0026brcmf_sdmmc_driver);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1274-}\n--\ndrivers/net/wireless/marvell/libertas/if_sdio.c=1390=static int __init if_sdio_init_module(void)\n--\ndrivers/net/wireless/marvell/libertas/if_sdio.c-1396-\ndrivers/net/wireless/marvell/libertas/if_sdio.c:1397:\tret = sdio_register_driver(\u0026if_sdio_driver);\ndrivers/net/wireless/marvell/libertas/if_sdio.c-1398-\n--\ndrivers/net/wireless/silabs/wfx/main.c=506=static int __init wfx_core_init(void)\n--\ndrivers/net/wireless/silabs/wfx/main.c-515-\tif (IS_ENABLED(CONFIG_MMC)) {\ndrivers/net/wireless/silabs/wfx/main.c:516:\t\tret = sdio_register_driver(\u0026wfx_sdio_driver);\ndrivers/net/wireless/silabs/wfx/main.c-517-\t\tif (ret)\n--\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c=388=static int __init cw1200_sdio_init(void)\n--\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c-400-\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c:401:\tret = sdio_register_driver(\u0026sdio_driver);\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c-402-\tif (ret)\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=453=static int __init rtw_drv_entry(void)\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-454-{\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:455:\treturn sdio_register_driver(\u0026rtl8723bs_sdio_driver);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-456-}\n--\ninclude/linux/mmc/sdio_func.h=75=struct sdio_driver {\n--\ninclude/linux/mmc/sdio_func.h-110-/* use a macro to avoid include chaining to get THIS_MODULE /\ninclude/linux/mmc/sdio_func.h:111:#define sdio_register_driver(drv) \\\ninclude/linux/mmc/sdio_func.h:112:\t__sdio_register_driver(drv, THIS_MODULE)\ninclude/linux/mmc/sdio_func.h:113:extern int __sdio_register_driver(struct sdio_driver , struct module );\ninclude/linux/mmc/sdio_func.h-114-extern void sdio_unregister_driver(struct sdio_driver );\n--\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, \\\ninclude/linux/mmc/sdio_func.h-126-\t\t sdio_unregister_driver)\n" }
9/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 10050 output: 18 thoughts: 61 Thoughts: MMC/SDIO Device Emulation - A Quick Investigation Alright, hold on a second! This is interesting... can we actually emulate MMC/SDIO devices within the standard QEMU environment or leverage syzkaller for this? My immediate thought is, are there any virtual MMC/SDIO host controllers lurking around, perhaps in the kernel source or even within syzkaller's test infrastructure? That's the logical starting point. I'll need to confirm if these exist. I'll quickly run a search. "mmc_test" seems like a reasonable keyword to begin with, or perhaps anything similar that suggests testing or virtual functionality within the MMC or SDIO realm. This initial probe should quickly determine if there's even a foundation to build on.
10/2	2026/09/23 03:43	tool	grepper	0m Args: { "Expression": "mmc_test" } Results: { "Output": "\nFull output is too long, showing 500 out of 1894 lines.\nUse more precise expression if possible.\n\nDocumentation/driver-api/mmc/mmc-async-req.rst=35=in parallel with the transfer performance won't be affected.\nDocumentation/driver-api/mmc/mmc-async-req.rst-36-\nDocumentation/driver-api/mmc/mmc-async-req.rst:37:Details on measurements from IOZone and mmc_test\nDocumentation/driver-api/mmc/mmc-async-req.rst-38-================================================\n--\nDocumentation/driver-api/mmc/mmc-test.rst=7=Overview\n--\nDocumentation/driver-api/mmc/mmc-test.rst-9-\nDocumentation/driver-api/mmc/mmc-test.rst:10:The `mmc_test` framework is designed to test the performance and reliability of host controller drivers and all devices handled by the MMC subsystem. This ...\nDocumentation/driver-api/mmc/mmc-test.rst-11-\nDocumentation/driver-api/mmc/mmc-test.rst=12=The framework provides a variety of tests to evaluate different aspects of the host controller and device interactions, such as read and write performance,...\nDocumentation/driver-api/mmc/mmc-test.rst-13-\nDocumentation/driver-api/mmc/mmc-test.rst:14:The `mmc_test` framework is particularly useful for:\nDocumentation/driver-api/mmc/mmc-test.rst-15-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=24=Initialization\n--\nDocumentation/driver-api/mmc/mmc-test.rst-26-\nDocumentation/driver-api/mmc/mmc-test.rst:27:To use the ``mmc_test`` framework, follow these steps:\nDocumentation/driver-api/mmc/mmc-test.rst-28-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-52-\nDocumentation/driver-api/mmc/mmc-test.rst:53: If the ``mmc_test`` framework is built as a module, you need to load it using ``modprobe``:\nDocumentation/driver-api/mmc/mmc-test.rst-54-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-56-\nDocumentation/driver-api/mmc/mmc-test.rst:57: modprobe mmc_test\nDocumentation/driver-api/mmc/mmc-test.rst-58-\nDocumentation/driver-api/mmc/mmc-test.rst=59=Binding the MMC Card for Testing\n--\nDocumentation/driver-api/mmc/mmc-test.rst-61-\nDocumentation/driver-api/mmc/mmc-test.rst:62:To enable MMC testing, you need to unbind the MMC card from the ``mmcblk`` driver and bind it to the ``mmc_test`` driver. This allows the ``mmc_test`` fram...\nDocumentation/driver-api/mmc/mmc-test.rst-63-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-77-\nDocumentation/driver-api/mmc/mmc-test.rst:78:3. Bind the MMC card to the ``mmc_test`` driver:\nDocumentation/driver-api/mmc/mmc-test.rst-79-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-81-\nDocumentation/driver-api/mmc/mmc-test.rst:82: echo 'mmc0:0001' \u003e /sys/bus/mmc/drivers/mmc_test/bind\nDocumentation/driver-api/mmc/mmc-test.rst-83-\nDocumentation/driver-api/mmc/mmc-test.rst=84=After binding, you should see a line in the kernel log indicating that the card has been claimed for testing:\n--\nDocumentation/driver-api/mmc/mmc-test.rst-87-\nDocumentation/driver-api/mmc/mmc-test.rst:88: mmc_test mmc0:0001: Card claimed for testing.\nDocumentation/driver-api/mmc/mmc-test.rst-89-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=91=Usage - Debugfs Entries\n--\nDocumentation/driver-api/mmc/mmc-test.rst-93-\nDocumentation/driver-api/mmc/mmc-test.rst:94:Once the ``mmc_test`` framework is enabled, you can interact with the following debugfs entries located in ``/sys/kernel/debug/mmc0/mmc0:0001``:\nDocumentation/driver-api/mmc/mmc-test.rst-95-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=291=Contributing\n--\nDocumentation/driver-api/mmc/mmc-test.rst-293-\nDocumentation/driver-api/mmc/mmc-test.rst:294:Contributions to the `mmc_test` framework are welcome. Please follow the standard Linux kernel contribution guidelines and submit patches to the appropria...\nDocumentation/driver-api/mmc/mmc-test.rst-295-\n--\narch/arm64/boot/dts/qcom/sdm845-db845c.dts=1040=\t\tclk-pins {\n--\narch/arm64/boot/dts/qcom/sdm845-db845c.dts-1044-\t\t\t/\narch/arm64/boot/dts/qcom/sdm845-db845c.dts:1045:\t\t\t It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-db845c.dts-1046-\t\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi=581=\tsdc2_clk: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi-585-\t\t/\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi:586:\t\t It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi-587-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-mtp.dts=801=\tsdc2_clk: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-mtp.dts-805-\t\t/\narch/arm64/boot/dts/qcom/sdm845-mtp.dts:806:\t\t It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-mtp.dts-807-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts=1025=\tsdc2_clk_state: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts-1029-\t\t/\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts:1030:\t\t It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts-1031-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi=613=\t\temmc_strb: emmc-strb {\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-619-\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:620:\temmc_testclk {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-621-\t\t/omit-if-no-ref/\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:622:\t\temmc_testclk_test: emmc_testclk-test {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-623-\t\t\trockchip,pins =\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:624:\t\t\t\t/* emmc_testclk_out /\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-625-\t\t\t\t\u003c1 RK_PB3 6 \u0026pcfg_pull_none\u003e;\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-628-\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:629:\temmc_testdata {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-630-\t\t/omit-if-no-ref/\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:631:\t\temmc_testdata_test: emmc_testdata-test {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-632-\t\t\trockchip,pins =\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:633:\t\t\t\t/ emmc_testdata_out /\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-634-\t\t\t\t\u003c1 RK_PB7 5 \u0026pcfg_pull_none\u003e;\n--\ndrivers/gpu/drm/ast/ast_2300.c=117=static const u32 pattern[8] = {\n--\ndrivers/gpu/drm/ast/ast_2300.c-127-\ndrivers/gpu/drm/ast/ast_2300.c:128:static u32 mmc_test2(struct ast_device ast, u32 datagen, u8 test_ctl)\ndrivers/gpu/drm/ast/ast_2300.c-129-{\n--\ndrivers/gpu/drm/ast/ast_2300.c-147-\ndrivers/gpu/drm/ast/ast_2300.c:148:static u32 mmc_test_burst2(struct ast_device ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-149-{\ndrivers/gpu/drm/ast/ast_2300.c:150:\treturn mmc_test2(ast, datagen, 0x41);\ndrivers/gpu/drm/ast/ast_2300.c-151-}\ndrivers/gpu/drm/ast/ast_2300.c-152-\ndrivers/gpu/drm/ast/ast_2300.c:153:static bool mmc_test_single(struct ast_device ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-154-{\ndrivers/gpu/drm/ast/ast_2300.c:155:\treturn mmc_test(ast, datagen, 0xc5);\ndrivers/gpu/drm/ast/ast_2300.c-156-}\ndrivers/gpu/drm/ast/ast_2300.c-157-\ndrivers/gpu/drm/ast/ast_2300.c:158:static u32 mmc_test_single2(struct ast_device ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-159-{\ndrivers/gpu/drm/ast/ast_2300.c:160:\treturn mmc_test2(ast, datagen, 0x05);\ndrivers/gpu/drm/ast/ast_2300.c-161-}\n--\ndrivers/gpu/drm/ast/ast_2300.c=163=static int cbr_test(struct ast_device ast)\n--\ndrivers/gpu/drm/ast/ast_2300.c-167-\ndrivers/gpu/drm/ast/ast_2300.c:168:\tdata = mmc_test_single2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-169-\tif ((data \u0026 0xff) \u0026\u0026 (data \u0026 0xff00))\n--\ndrivers/gpu/drm/ast/ast_2300.c-171-\tfor (i = 0; i \u003c 8; i++) {\ndrivers/gpu/drm/ast/ast_2300.c:172:\t\tdata = mmc_test_burst2(ast, i);\ndrivers/gpu/drm/ast/ast_2300.c-173-\t\tif ((data \u0026 0xff) \u0026\u0026 (data \u0026 0xff00))\n--\ndrivers/gpu/drm/ast/ast_2300.c=205=static u32 cbr_test2(struct ast_device ast)\n--\ndrivers/gpu/drm/ast/ast_2300.c-208-\ndrivers/gpu/drm/ast/ast_2300.c:209:\tdata = mmc_test_burst2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-210-\tif (data == 0xffff)\ndrivers/gpu/drm/ast/ast_2300.c-211-\t\treturn 0;\ndrivers/gpu/drm/ast/ast_2300.c:212:\tdata \|= mmc_test_single2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-213-\tif (data == 0xffff)\n--\ndrivers/gpu/drm/ast/ast_2300.c=241=static bool cbr_test3(struct ast_device ast)\ndrivers/gpu/drm/ast/ast_2300.c-242-{\ndrivers/gpu/drm/ast/ast_2300.c:243:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2300.c-244-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2300.c:245:\tif (!mmc_test_single(ast, 0))\ndrivers/gpu/drm/ast/ast_2300.c-246-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_2500.c=107=void ast_2500_patch_ahb(void __iomem regs)\n--\ndrivers/gpu/drm/ast/ast_2500.c-143-\ndrivers/gpu/drm/ast/ast_2500.c:144:static bool mmc_test_single_2500(struct ast_device ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2500.c-145-{\ndrivers/gpu/drm/ast/ast_2500.c:146:\treturn mmc_test(ast, datagen, 0x85);\ndrivers/gpu/drm/ast/ast_2500.c-147-}\n--\ndrivers/gpu/drm/ast/ast_2500.c=149=static bool cbr_test_2500(struct ast_device ast)\n--\ndrivers/gpu/drm/ast/ast_2500.c-152-\tast_moutdwm(ast, AST_REG_MCR7C, 0xFF00FF00);\ndrivers/gpu/drm/ast/ast_2500.c:153:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-154-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:155:\tif (!mmc_test_single_2500(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-156-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_2500.c=160=static bool ddr_test_2500(struct ast_device ast)\n--\ndrivers/gpu/drm/ast/ast_2500.c-163-\tast_moutdwm(ast, AST_REG_MCR7C, 0xFF00FF00);\ndrivers/gpu/drm/ast/ast_2500.c:164:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-165-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:166:\tif (!mmc_test_burst(ast, 1))\ndrivers/gpu/drm/ast/ast_2500.c-167-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:168:\tif (!mmc_test_burst(ast, 2))\ndrivers/gpu/drm/ast/ast_2500.c-169-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:170:\tif (!mmc_test_burst(ast, 3))\ndrivers/gpu/drm/ast/ast_2500.c-171-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:172:\tif (!mmc_test_single_2500(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-173-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_post.c=37=int ast_post_gpu(struct ast_device ast)\n--\ndrivers/gpu/drm/ast/ast_post.c-67-\ndrivers/gpu/drm/ast/ast_post.c:68:bool mmc_test(struct ast_device ast, u32 datagen, u8 test_ctl)\ndrivers/gpu/drm/ast/ast_post.c-69-{\n--\ndrivers/gpu/drm/ast/ast_post.c-87-\ndrivers/gpu/drm/ast/ast_post.c:88:bool mmc_test_burst(struct ast_device ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_post.c-89-{\ndrivers/gpu/drm/ast/ast_post.c:90:\treturn mmc_test(ast, datagen, 0xc1);\ndrivers/gpu/drm/ast/ast_post.c-91-}\n--\ndrivers/gpu/drm/ast/ast_post.h=12=struct ast_dramstruct {\n--\ndrivers/gpu/drm/ast/ast_post.h-38-\ndrivers/gpu/drm/ast/ast_post.h:39:bool mmc_test(struct ast_device ast, u32 datagen, u8 test_ctl);\ndrivers/gpu/drm/ast/ast_post.h:40:bool mmc_test_burst(struct ast_device ast, u32 datagen);\ndrivers/gpu/drm/ast/ast_post.h-41-\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/mmc/core/mmc.c=1619=static int mmc_init_card(struct mmc_host host, u32 ocr,\n--\ndrivers/mmc/core/mmc.c-1930-\t/\ndrivers/mmc/core/mmc.c:1931:\t In some cases (e.g. RPMB or mmc_test), the Command Queue must be\ndrivers/mmc/core/mmc.c-1932-\t * disabled for a time, so a flag is needed to indicate to re-enable the\n--\ndrivers/mmc/core/mmc_test.c-42-/*\ndrivers/mmc/core/mmc_test.c:43: struct mmc_test_pages - pages allocated by 'alloc_pages()'.\ndrivers/mmc/core/mmc_test.c-44- * @page: first page in the allocation\n--\ndrivers/mmc/core/mmc_test.c-46- /\ndrivers/mmc/core/mmc_test.c:47:struct mmc_test_pages {\ndrivers/mmc/core/mmc_test.c-48-\tstruct page page;\n--\ndrivers/mmc/core/mmc_test.c-52-/*\ndrivers/mmc/core/mmc_test.c:53: struct mmc_test_mem - allocated memory.\ndrivers/mmc/core/mmc_test.c-54- * @cnt: number of allocations\n--\ndrivers/mmc/core/mmc_test.c-56- /\ndrivers/mmc/core/mmc_test.c:57:struct mmc_test_mem {\ndrivers/mmc/core/mmc_test.c-58-\tunsigned int cnt;\ndrivers/mmc/core/mmc_test.c:59:\tstruct mmc_test_pages arr[] __counted_by(cnt);\ndrivers/mmc/core/mmc_test.c-60-};\n--\ndrivers/mmc/core/mmc_test.c-62-/\ndrivers/mmc/core/mmc_test.c:63: struct mmc_test_area - information for performance tests.\ndrivers/mmc/core/mmc_test.c-64- * @max_sz: test area size (in bytes)\n--\ndrivers/mmc/core/mmc_test.c-74- /\ndrivers/mmc/core/mmc_test.c:75:struct mmc_test_area {\ndrivers/mmc/core/mmc_test.c-76-\tunsigned long max_sz;\n--\ndrivers/mmc/core/mmc_test.c-82-\tunsigned int sg_len;\ndrivers/mmc/core/mmc_test.c:83:\tstruct mmc_test_mem mem;\ndrivers/mmc/core/mmc_test.c-84-\tstruct scatterlist sg;\n--\ndrivers/mmc/core/mmc_test.c-88-/\ndrivers/mmc/core/mmc_test.c:89: struct mmc_test_transfer_result - transfer results for performance tests.\ndrivers/mmc/core/mmc_test.c-90- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-96- /\ndrivers/mmc/core/mmc_test.c:97:struct mmc_test_transfer_result {\ndrivers/mmc/core/mmc_test.c-98-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-106-/\ndrivers/mmc/core/mmc_test.c:107: struct mmc_test_general_result - results for tests.\ndrivers/mmc/core/mmc_test.c-108- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-111- * @result: result of test run\ndrivers/mmc/core/mmc_test.c:112: * @tr_lst: transfer measurements if any as mmc_test_transfer_result\ndrivers/mmc/core/mmc_test.c-113- /\ndrivers/mmc/core/mmc_test.c:114:struct mmc_test_general_result {\ndrivers/mmc/core/mmc_test.c-115-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-122-/\ndrivers/mmc/core/mmc_test.c:123: struct mmc_test_dbgfs_file - debugfs related file.\ndrivers/mmc/core/mmc_test.c-124- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-127- /\ndrivers/mmc/core/mmc_test.c:128:struct mmc_test_dbgfs_file {\ndrivers/mmc/core/mmc_test.c-129-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-134-/\ndrivers/mmc/core/mmc_test.c:135: struct mmc_test_card - test information.\ndrivers/mmc/core/mmc_test.c-136- * @card: card under test\n--\ndrivers/mmc/core/mmc_test.c-142- /\ndrivers/mmc/core/mmc_test.c:143:struct mmc_test_card {\ndrivers/mmc/core/mmc_test.c-144-\tstruct mmc_card\tcard;\n--\ndrivers/mmc/core/mmc_test.c-149-#endif\ndrivers/mmc/core/mmc_test.c:150:\tstruct mmc_test_area\t\tarea;\ndrivers/mmc/core/mmc_test.c:151:\tstruct mmc_test_general_result\tgr;\ndrivers/mmc/core/mmc_test.c-152-\n--\ndrivers/mmc/core/mmc_test.c-155-\ndrivers/mmc/core/mmc_test.c:156:enum mmc_test_prep_media {\ndrivers/mmc/core/mmc_test.c-157-\tMMC_TEST_PREP_NONE = 0,\n--\ndrivers/mmc/core/mmc_test.c-161-\ndrivers/mmc/core/mmc_test.c:162:struct mmc_test_multiple_rw {\ndrivers/mmc/core/mmc_test.c-163-\tunsigned int sg_len;\n--\ndrivers/mmc/core/mmc_test.c-168-\tbool do_nonblock_req;\ndrivers/mmc/core/mmc_test.c:169:\tenum mmc_test_prep_media prepare;\ndrivers/mmc/core/mmc_test.c-170-};\n--\ndrivers/mmc/core/mmc_test.c=175=static unsigned int sg_len[] = {1, 1 \u003c\u003c 3, 1 \u003c\u003c 4, 1 \u003c\u003c 5, 1 \u003c\u003c 6,\n--\ndrivers/mmc/core/mmc_test.c-183- /\ndrivers/mmc/core/mmc_test.c:184:static int mmc_test_set_blksize(struct mmc_test_card test, unsigned size)\ndrivers/mmc/core/mmc_test.c-185-{\n--\ndrivers/mmc/core/mmc_test.c-188-\ndrivers/mmc/core/mmc_test.c:189:static void mmc_test_prepare_sbc(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-190-\t\t\t\t struct mmc_request mrq, unsigned int blocks)\n--\ndrivers/mmc/core/mmc_test.c-208- /\ndrivers/mmc/core/mmc_test.c:209:static void mmc_test_prepare_mrq(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-210-\tstruct mmc_request mrq, struct scatterlist sg, unsigned sg_len,\n--\ndrivers/mmc/core/mmc_test.c-243-\ndrivers/mmc/core/mmc_test.c:244:\tmmc_test_prepare_sbc(test, mrq, blocks);\ndrivers/mmc/core/mmc_test.c-245-\n--\ndrivers/mmc/core/mmc_test.c-248-\ndrivers/mmc/core/mmc_test.c:249:static int mmc_test_busy(struct mmc_command cmd)\ndrivers/mmc/core/mmc_test.c-250-{\n--\ndrivers/mmc/core/mmc_test.c-257- /\ndrivers/mmc/core/mmc_test.c:258:static int mmc_test_wait_busy(struct mmc_test_card test)\ndrivers/mmc/core/mmc_test.c-259-{\n--\ndrivers/mmc/core/mmc_test.c-274-\ndrivers/mmc/core/mmc_test.c:275:\t\tif (!busy \u0026\u0026 mmc_test_busy(\u0026cmd)) {\ndrivers/mmc/core/mmc_test.c-276-\t\t\tbusy = 1;\n--\ndrivers/mmc/core/mmc_test.c-280-\t\t}\ndrivers/mmc/core/mmc_test.c:281:\t} while (mmc_test_busy(\u0026cmd));\ndrivers/mmc/core/mmc_test.c-282-\n--\ndrivers/mmc/core/mmc_test.c-288- /\ndrivers/mmc/core/mmc_test.c:289:static int mmc_test_buffer_transfer(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-290-\tu8 buffer, unsigned addr, unsigned blksz, int write)\n--\ndrivers/mmc/core/mmc_test.c-304-\ndrivers/mmc/core/mmc_test.c:305:\tmmc_test_prepare_mrq(test, \u0026mrq, \u0026sg, 1, addr, 1, blksz, write);\ndrivers/mmc/core/mmc_test.c-306-\n--\ndrivers/mmc/core/mmc_test.c-313-\ndrivers/mmc/core/mmc_test.c:314:\treturn mmc_test_wait_busy(test);\ndrivers/mmc/core/mmc_test.c-315-}\ndrivers/mmc/core/mmc_test.c-316-\ndrivers/mmc/core/mmc_test.c:317:static void mmc_test_free_mem(struct mmc_test_mem mem)\ndrivers/mmc/core/mmc_test.c-318-{\n--\ndrivers/mmc/core/mmc_test.c-332- /\ndrivers/mmc/core/mmc_test.c:333:static struct mmc_test_mem mmc_test_alloc_mem(unsigned long min_sz,\ndrivers/mmc/core/mmc_test.c-334-\t\t\t\t\t unsigned long max_sz,\n--\ndrivers/mmc/core/mmc_test.c-342-\tunsigned long limit = nr_free_buffer_pages() \u003e\u003e 4;\ndrivers/mmc/core/mmc_test.c:343:\tstruct mmc_test_mem mem;\ndrivers/mmc/core/mmc_test.c-344-\tunsigned int idx = 0;\n--\ndrivers/mmc/core/mmc_test.c-398-\tmem-\u003ecnt = idx;\ndrivers/mmc/core/mmc_test.c:399:\tmmc_test_free_mem(mem);\ndrivers/mmc/core/mmc_test.c-400-\treturn NULL;\n--\ndrivers/mmc/core/mmc_test.c-406- /\ndrivers/mmc/core/mmc_test.c:407:static int mmc_test_map_sg(struct mmc_test_mem mem, unsigned long size,\ndrivers/mmc/core/mmc_test.c-408-\t\t\t struct scatterlist sglist, int repeat,\n--\ndrivers/mmc/core/mmc_test.c-457- /\ndrivers/mmc/core/mmc_test.c:458:static int mmc_test_map_sg_max_scatter(struct mmc_test_mem mem,\ndrivers/mmc/core/mmc_test.c-459-\t\t\t\t unsigned long sz,\n--\ndrivers/mmc/core/mmc_test.c-508- /\ndrivers/mmc/core/mmc_test.c:509:static unsigned int mmc_test_rate(uint64_t bytes, struct timespec64 ts)\ndrivers/mmc/core/mmc_test.c-510-{\n--\ndrivers/mmc/core/mmc_test.c-531- /\ndrivers/mmc/core/mmc_test.c:532:static void mmc_test_save_transfer_result(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-533-\tunsigned int count, unsigned int sectors, struct timespec64 ts,\n--\ndrivers/mmc/core/mmc_test.c-535-{\ndrivers/mmc/core/mmc_test.c:536:\tstruct mmc_test_transfer_result tr;\ndrivers/mmc/core/mmc_test.c-537-\n--\ndrivers/mmc/core/mmc_test.c-556- /\ndrivers/mmc/core/mmc_test.c:557:static void mmc_test_print_rate(struct mmc_test_card test, uint64_t bytes,\ndrivers/mmc/core/mmc_test.c-558-\t\t\t\tstruct timespec64 ts1, struct timespec64 ts2)\n--\ndrivers/mmc/core/mmc_test.c-564-\ndrivers/mmc/core/mmc_test.c:565:\trate = mmc_test_rate(bytes, \u0026ts);\ndrivers/mmc/core/mmc_test.c:566:\tiops = mmc_test_rate(100, \u0026ts); /* I/O ops per sec x 100 /\ndrivers/mmc/core/mmc_test.c-567-\n--\ndrivers/mmc/core/mmc_test.c-574-\ndrivers/mmc/core/mmc_test.c:575:\tmmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops);\ndrivers/mmc/core/mmc_test.c-576-}\n--\ndrivers/mmc/core/mmc_test.c-580- /\ndrivers/mmc/core/mmc_test.c:581:static void mmc_test_print_avg_rate(struct mmc_test_card test, uint64_t bytes,\ndrivers/mmc/core/mmc_test.c-582-\t\t\t\t unsigned int count, struct timespec64 ts1,\n--\ndrivers/mmc/core/mmc_test.c-590-\ndrivers/mmc/core/mmc_test.c:591:\trate = mmc_test_rate(tot, \u0026ts);\ndrivers/mmc/core/mmc_test.c:592:\tiops = mmc_test_rate(count * 100, \u0026ts); /* I/O ops per sec x 100 /\ndrivers/mmc/core/mmc_test.c-593-\n--\ndrivers/mmc/core/mmc_test.c-599-\ndrivers/mmc/core/mmc_test.c:600:\tmmc_test_save_transfer_result(test, count, sectors, ts, rate, iops);\ndrivers/mmc/core/mmc_test.c-601-}\n--\ndrivers/mmc/core/mmc_test.c-605- /\ndrivers/mmc/core/mmc_test.c:606:static unsigned int mmc_test_capacity(struct mmc_card card)\ndrivers/mmc/core/mmc_test.c-607-{\n--\ndrivers/mmc/core/mmc_test.c-621- /\ndrivers/mmc/core/mmc_test.c:622:static int __mmc_test_prepare(struct mmc_test_card test, int write, int val)\ndrivers/mmc/core/mmc_test.c-623-{\n--\ndrivers/mmc/core/mmc_test.c-625-\ndrivers/mmc/core/mmc_test.c:626:\tret = mmc_test_set_blksize(test, 512);\ndrivers/mmc/core/mmc_test.c-627-\tif (ret)\n--\ndrivers/mmc/core/mmc_test.c-637-\tfor (i = 0; i \u003c BUFFER_SIZE / 512; i++) {\ndrivers/mmc/core/mmc_test.c:638:\t\tret = mmc_test_buffer_transfer(test, test-\u003ebuffer, i, 512, 1);\ndrivers/mmc/core/mmc_test.c-639-\t\tif (ret)\n--\ndrivers/mmc/core/mmc_test.c-645-\ndrivers/mmc/core/mmc_test.c:646:static int mmc_test_prepare_write(struct mmc_test_card test)\ndrivers/mmc/core/mmc_test.c-647-{\ndrivers/mmc/core/mmc_test.c:648:\treturn __mmc_test_prepare(test, 1, 0xDF);\ndrivers/mmc/core/mmc_test.c-649-}\ndrivers/mmc/core/mmc_test.c-650-\ndrivers/mmc/core/mmc_test.c:651:static int mmc_test_prepare_read(struct mmc_test_card test)\ndrivers/mmc/core/mmc_test.c-652-{\ndrivers/mmc/core/mmc_test.c:653:\treturn __mmc_test_prepare(test, 0, 0);\ndrivers/mmc/core/mmc_test.c-654-}\ndrivers/mmc/core/mmc_test.c-655-\ndrivers/mmc/core/mmc_test.c:656:static int mmc_test_cleanup(struct mmc_test_card test)\ndrivers/mmc/core/mmc_test.c-657-{\ndrivers/mmc/core/mmc_test.c:658:\treturn __mmc_test_prepare(test, 1, 0);\ndrivers/mmc/core/mmc_test.c-659-}\n--\ndrivers/mmc/core/mmc_test.c-667- /\ndrivers/mmc/core/mmc_test.c:668:static void mmc_test_prepare_broken_mrq(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-669-\tstruct mmc_request mrq, int write)\n--\ndrivers/mmc/core/mmc_test.c-686- /\ndrivers/mmc/core/mmc_test.c:687:static int mmc_test_check_result(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-688-\t\t\t\t struct mmc_request mrq)\n--\ndrivers/mmc/core/mmc_test.c-717- /\ndrivers/mmc/core/mmc_test.c:718:static int mmc_test_check_broken_result(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-719-\tstruct mmc_request mrq)\n--\ndrivers/mmc/core/mmc_test.c-749-\ndrivers/mmc/core/mmc_test.c:750:struct mmc_test_req {\ndrivers/mmc/core/mmc_test.c-751-\tstruct mmc_request mrq;\n--\ndrivers/mmc/core/mmc_test.c-761- /\ndrivers/mmc/core/mmc_test.c:762:static void mmc_test_req_reset(struct mmc_test_req rq)\ndrivers/mmc/core/mmc_test.c-763-{\ndrivers/mmc/core/mmc_test.c:764:\tmemset(rq, 0, sizeof(struct mmc_test_req));\ndrivers/mmc/core/mmc_test.c-765-\n--\ndrivers/mmc/core/mmc_test.c-770-\ndrivers/mmc/core/mmc_test.c:771:static struct mmc_test_req mmc_test_req_alloc(void)\ndrivers/mmc/core/mmc_test.c-772-{\ndrivers/mmc/core/mmc_test.c:773:\tstruct mmc_test_req rq = kmalloc_obj(rq);\ndrivers/mmc/core/mmc_test.c-774-\ndrivers/mmc/core/mmc_test.c-775-\tif (rq)\ndrivers/mmc/core/mmc_test.c:776:\t\tmmc_test_req_reset(rq);\ndrivers/mmc/core/mmc_test.c-777-\n--\ndrivers/mmc/core/mmc_test.c-780-\ndrivers/mmc/core/mmc_test.c:781:static void mmc_test_wait_done(struct mmc_request mrq)\ndrivers/mmc/core/mmc_test.c-782-{\n--\ndrivers/mmc/core/mmc_test.c-785-\ndrivers/mmc/core/mmc_test.c:786:static int mmc_test_start_areq(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-787-\t\t\t struct mmc_request mrq,\n--\ndrivers/mmc/core/mmc_test.c-794-\t\tinit_completion(\u0026mrq-\u003ecompletion);\ndrivers/mmc/core/mmc_test.c:795:\t\tmrq-\u003edone = mmc_test_wait_done;\ndrivers/mmc/core/mmc_test.c-796-\t\tmmc_pre_req(host, mrq);\n--\ndrivers/mmc/core/mmc_test.c-800-\t\twait_for_completion(\u0026prev_mrq-\u003ecompletion);\ndrivers/mmc/core/mmc_test.c:801:\t\terr = mmc_test_wait_busy(test);\ndrivers/mmc/core/mmc_test.c-802-\t\tif (!err)\ndrivers/mmc/core/mmc_test.c:803:\t\t\terr = mmc_test_check_result(test, prev_mrq);\ndrivers/mmc/core/mmc_test.c-804-\t}\n--\ndrivers/mmc/core/mmc_test.c-820-\ndrivers/mmc/core/mmc_test.c:821:static int mmc_test_nonblock_transfer(struct mmc_test_card test,\ndrivers/mmc/core/mmc_test.c-822-\t\t\t\t unsigned int dev_addr, int write,\n--\ndrivers/mmc/core/mmc_test.c-824-{\ndrivers/mmc/core/mmc_test.c:825:\tstruct mmc_test_req rq1, rq2;\ndrivers/mmc/core/mmc_test.c-826-\tstruct mmc_request mrq, prev_mrq;\n--\ndrivers/mmc/core/mmc_test.c-828-\tint ret = RESULT_OK;\ndrivers/mmc/core/mmc_test.c:829:\tstruct mmc_test_area t = \u0026test-\u003earea;\ndrivers/mmc/core/mmc_test.c-830-\tstruct scatterlist sg = t-\u003esg;\n--\ndrivers/mmc/core/mmc_test.c-832-\ndrivers/mmc/core/mmc_test.c:833:\trq1 = mmc_test_req_alloc();\ndrivers/mmc/core/mmc_test.c:834:\trq2 = mmc_test_req_alloc();\ndrivers/mmc/core/mmc_test.c-835-\tif (!rq1 \|\| !rq2) {\n--\ndrivers/mmc/core/mmc_test.c-843-\tfor (i = 0; i \u003c count; i++) {\ndrivers/mmc/core/mmc_test.c:844:\t\tmmc_test_req_reset(container_of(mrq, struct mmc_test_req, mrq));\ndrivers/mmc/core/mmc_test.c:845:\t\tmmc_test_prepare_mrq(test, mrq, sg, t-\u003esg_len, dev_addr,\ndrivers/mmc/core/mmc_test.c-846-\t\t\t\t t-\u003eblocks, 512, write);\ndrivers/mmc/core/mmc_test.c:847:\t\tret = mmc_test_start_areq(test, mrq, prev_mrq);\ndrivers/mmc/core/mmc_test.c-848-\t\tif (ret)\n\n" }
11/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 22271 output: 40 thoughts: 320 Thoughts: My Line of Inquiry: mac80211_hwsim and RTL8723BS Okay, hold on a minute! I was focusing on the architecture, but I need to consider `mac80211_hwsim`. Does the RTL8723BS driver even use mac80211? Time to dig in... Let's check the `drivers/staging/rtl8723bs/Kconfig` file. Right, I see the dependencies: `WLAN && MMC && CFG80211`. Ah, right, it doesn't use mac80211 directly, but it does use cfg80211. And this is a standalone driver specifically for the Realtek RTL8723BS SDIO Wireless LAN NIC. Now, that brings up another critical question: how does an SDIO device probe and initialize in the Linux kernel? I remember... SDIO devices are typically probed when an MMC host detects an SDIO card. So, thinking about QEMU, what MMC hosts are available? I know QEMU has `sdhci-pci`. Great! But here's the kicker: what SDIO card can actually be plugged into the `sdhci-pci` device in QEMU? QEMU emulates SD memory cards (`sd-card`), which is a block storage device. But does QEMU emulate a Realtek RTL8723BS SDIO WiFi card? No! QEMU only has `sd-card`, which is a generic MMC/SD card for block storage, not an SDIO WiFi card, especially not an RTL8723BS with its specific vendor ID (0x024c) and device IDs (0x0523, 0xb723, etc.). That's a deal-breaker! Okay, so maybe I can create the SDIO device via the sysfs `new_device` interface. I'll need to check the relevant code, let's look at `drivers/mmc/core/sdio_bus.c`.
12/2	2026/09/23 03:43	tool	read-file	0m Args: { "File": "drivers/mmc/core/sdio_bus.c", "FirstLine": 1, "LineCount": 100 } Results: { "Contents": " 1:\t// SPDX-License-Identifier: GPL-2.0-or-later\n 2:\t/\n 3:\t linux/drivers/mmc/core/sdio_bus.c\n 4:\t \n 5:\t Copyright 2007 Pierre Ossman\n 6:\t \n 7:\t SDIO function driver model\n 8:\t /\n 9:\t\n 10:\t#include \u003clinux/device.h\u003e\n 11:\t#include \u003clinux/err.h\u003e\n 12:\t#include \u003clinux/export.h\u003e\n 13:\t#include \u003clinux/slab.h\u003e\n 14:\t#include \u003clinux/pm_runtime.h\u003e\n 15:\t#include \u003clinux/pm_domain.h\u003e\n 16:\t#include \u003clinux/acpi.h\u003e\n 17:\t#include \u003clinux/sysfs.h\u003e\n 18:\t\n 19:\t#include \u003clinux/mmc/card.h\u003e\n 20:\t#include \u003clinux/mmc/host.h\u003e\n 21:\t#include \u003clinux/mmc/sdio_func.h\u003e\n 22:\t#include \u003clinux/of.h\u003e\n 23:\t\n 24:\t#include \"core.h\"\n 25:\t#include \"card.h\"\n 26:\t#include \"sdio_cis.h\"\n 27:\t#include \"sdio_bus.h\"\n 28:\t\n 29:\t#define to_sdio_driver(d)\tcontainer_of_const(d, struct sdio_driver, drv)\n 30:\t\n 31:\t/ show configuration fields /\n 32:\t#define sdio_config_attr(field, format_string, args...)\t\t\t\\\n 33:\tstatic ssize_t\t\t\t\t\t\t\t\t\\\n 34:\tfield##_show(struct device dev, struct device_attribute attr, char buf)\t\t\t\t\\\n 35:\t{\t\t\t\t\t\t\t\t\t\\\n 36:\t\tstruct sdio_func func;\t\t\t\t\t\t\\\n 37:\t\t\t\t\t\t\t\t\t\t\\\n 38:\t\tfunc = dev_to_sdio_func (dev);\t\t\t\t\t\\\n 39:\t\treturn sysfs_emit(buf, format_string, args);\t\t\t\\\n 40:\t}\t\t\t\t\t\t\t\t\t\\\n 41:\tstatic DEVICE_ATTR_RO(field)\n 42:\t\n 43:\tsdio_config_attr(class, \"0x%02x\\n\", func-\u003eclass);\n 44:\tsdio_config_attr(vendor, \"0x%04x\\n\", func-\u003evendor);\n 45:\tsdio_config_attr(device, \"0x%04x\\n\", func-\u003edevice);\n 46:\tsdio_config_attr(revision, \"%u.%u\\n\", func-\u003emajor_rev, func-\u003eminor_rev);\n 47:\tsdio_config_attr(modalias, \"sdio:c%02Xv%04Xd%04X\\n\", func-\u003eclass, func-\u003evendor, func-\u003edevice);\n 48:\t\n 49:\t#define sdio_info_attr(num)\t\t\t\t\t\t\t\t\t\\\n 50:\tstatic ssize_t info##num##_show(struct device dev, struct device_attribute attr, char buf)\t\\\n 51:\t{\t\t\t\t\t\t\t\t\t\t\t\t\\\n 52:\t\tstruct sdio_func func = dev_to_sdio_func(dev);\t\t\t\t\t\t\\\n 53:\t\t\t\t\t\t\t\t\t\t\t\t\t\\\n 54:\t\tif (num \u003e func-\u003enum_info)\t\t\t\t\t\t\t\t\\\n 55:\t\t\treturn -ENODATA;\t\t\t\t\t\t\t\t\\\n 56:\t\tif (!func-\u003einfo[num - 1][0])\t\t\t\t\t\t\t\t\\\n 57:\t\t\treturn 0;\t\t\t\t\t\t\t\t\t\\\n 58:\t\treturn sysfs_emit(buf, \"%s\\n\", func-\u003einfo[num - 1]);\t\t\t\t\t\\\n 59:\t}\t\t\t\t\t\t\t\t\t\t\t\t\\\n 60:\tstatic DEVICE_ATTR_RO(info##num)\n 61:\t\n 62:\tsdio_info_attr(1);\n 63:\tsdio_info_attr(2);\n 64:\tsdio_info_attr(3);\n 65:\tsdio_info_attr(4);\n 66:\t\n 67:\tstatic struct attribute sdio_dev_attrs[] = {\n 68:\t\t\u0026dev_attr_class.attr,\n 69:\t\t\u0026dev_attr_vendor.attr,\n 70:\t\t\u0026dev_attr_device.attr,\n 71:\t\t\u0026dev_attr_revision.attr,\n 72:\t\t\u0026dev_attr_info1.attr,\n 73:\t\t\u0026dev_attr_info2.attr,\n 74:\t\t\u0026dev_attr_info3.attr,\n 75:\t\t\u0026dev_attr_info4.attr,\n 76:\t\t\u0026dev_attr_modalias.attr,\n 77:\t\tNULL,\n 78:\t};\n 79:\tATTRIBUTE_GROUPS(sdio_dev);\n 80:\t\n 81:\tstatic const struct sdio_device_id sdio_match_one(struct sdio_func func,\n 82:\t\tconst struct sdio_device_id id)\n 83:\t{\n 84:\t\tif (id-\u003eclass != (__u8)SDIO_ANY_ID \u0026\u0026 id-\u003eclass != func-\u003eclass)\n 85:\t\t\treturn NULL;\n 86:\t\tif (id-\u003evendor != (__u16)SDIO_ANY_ID \u0026\u0026 id-\u003evendor != func-\u003evendor)\n 87:\t\t\treturn NULL;\n 88:\t\tif (id-\u003edevice != (__u16)SDIO_ANY_ID \u0026\u0026 id-\u003edevice != func-\u003edevice)\n 89:\t\t\treturn NULL;\n 90:\t\treturn id;\n 91:\t}\n 92:\t\n 93:\tstatic const struct sdio_device_id sdio_match_device(struct sdio_func func,\n 94:\t\tconst struct sdio_driver sdrv)\n 95:\t{\n 96:\t\tconst struct sdio_device_id *ids;\n 97:\t\n 98:\t\tids = sdrv-\u003eid_table;\n 99:\t\n 100:\t\tif (ids) {\n" }
13/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 24671 output: 41 thoughts: 37 Thoughts: Okay, let's see. My first instinct here is to get a handle on how this SDIO bus type is structured. I need to quickly ascertain if `sdio_bus_type` contains a function or structure element that deals with new device enumeration. Specifically, something akin to `.new_device` is what I'm looking for, perhaps a similar naming scheme. To be sure, I’ll cross-reference the definition in `sdio_bus.c`. That file is likely to hold the core bus driver implementation, so it makes sense to confirm my expectations there.
14/2	2026/09/23 03:43	tool	read-file	0m Args: { "File": "drivers/mmc/core/sdio_bus.c", "FirstLine": 300, "LineCount": 80 } Results: { "Contents": " 300:\t\treturn driver_register(\u0026drv-\u003edrv);\n 301:\t}\n 302:\tEXPORT_SYMBOL_GPL(__sdio_register_driver);\n 303:\t\n 304:\t/*\n 305:\t \tsdio_unregister_driver - unregister a function driver\n 306:\t \t@drv: SDIO function driver\n 307:\t /\n 308:\tvoid sdio_unregister_driver(struct sdio_driver drv)\n 309:\t{\n 310:\t\tdrv-\u003edrv.bus = \u0026sdio_bus_type;\n 311:\t\tdriver_unregister(\u0026drv-\u003edrv);\n 312:\t}\n 313:\tEXPORT_SYMBOL_GPL(sdio_unregister_driver);\n 314:\t\n 315:\tstatic void sdio_release_func(struct device dev)\n 316:\t{\n 317:\t\tstruct sdio_func func = dev_to_sdio_func(dev);\n 318:\t\n 319:\t\tif (!(func-\u003ecard-\u003equirks \u0026 MMC_QUIRK_NONSTD_SDIO))\n 320:\t\t\tsdio_free_func_cis(func);\n 321:\t\n 322:\t\t/\n 323:\t\t * We have now removed the link to the tuples in the\n 324:\t\t * card structure, so remove the reference.\n 325:\t\t /\n 326:\t\tput_device(\u0026func-\u003ecard-\u003edev);\n 327:\t\n 328:\t\tkfree(func-\u003einfo);\n 329:\t\tkfree(func-\u003etmpbuf);\n 330:\t\tkfree(func);\n 331:\t}\n 332:\t\n 333:\t/\n 334:\t * Allocate and initialise a new SDIO function structure.\n 335:\t /\n 336:\tstruct sdio_func sdio_alloc_func(struct mmc_card card)\n 337:\t{\n 338:\t\tstruct sdio_func func;\n 339:\t\n 340:\t\tfunc = kzalloc_obj(struct sdio_func);\n 341:\t\tif (!func)\n 342:\t\t\treturn ERR_PTR(-ENOMEM);\n 343:\t\n 344:\t\t/\n 345:\t\t allocate buffer separately to make sure it's properly aligned for\n 346:\t\t * DMA usage (incl. 64 bit DMA)\n 347:\t\t /\n 348:\t\tfunc-\u003etmpbuf = kmalloc(4, GFP_KERNEL);\n 349:\t\tif (!func-\u003etmpbuf) {\n 350:\t\t\tkfree(func);\n 351:\t\t\treturn ERR_PTR(-ENOMEM);\n 352:\t\t}\n 353:\t\n 354:\t\tfunc-\u003ecard = card;\n 355:\t\n 356:\t\tdevice_initialize(\u0026func-\u003edev);\n 357:\t\n 358:\t\t/\n 359:\t\t * We may link to tuples in the card structure,\n 360:\t\t * we need make sure we have a reference to it.\n 361:\t\t /\n 362:\t\tget_device(\u0026func-\u003ecard-\u003edev);\n 363:\t\n 364:\t\tfunc-\u003edev.parent = \u0026card-\u003edev;\n 365:\t\tfunc-\u003edev.bus = \u0026sdio_bus_type;\n 366:\t\tfunc-\u003edev.release = sdio_release_func;\n 367:\t\n 368:\t\treturn func;\n 369:\t}\n 370:\t\n 371:\t#ifdef CONFIG_ACPI\n 372:\tstatic void sdio_acpi_set_handle(struct sdio_func func)\n 373:\t{\n 374:\t\tstruct mmc_host *host = func-\u003ecard-\u003ehost;\n 375:\t\tu64 addr = ((u64)host-\u003eslotno \u003c\u003c 16) \| func-\u003enum;\n 376:\t\n 377:\t\tacpi_preset_companion(\u0026func-\u003edev, ACPI_COMPANION(host-\u003eparent), addr);\n 378:\t}\n 379:\t#else\n" }
15/2	2026/09/23 03:43	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 25983 output: 31 thoughts: 12 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience, and delivered as a first-person summary: Initial Diagnostic: Examining the `sdio_bus_type` Alright, let's dive right in. My initial thought process is always methodical, so my first instinct is to zero in on the `sdio_bus_type`. This is the fundamental building block, the core abstraction we need to understand the behavior of the system. I need to refresh my memory and verify its current state within the context of whatever issue I'm debugging. Is it behaving as expected? Are there any obvious flags set that are causing conflicts? I'm going to start by confirming the bus type to see if that's a red herring. It's a quick sanity check, but it's often the place to start when diagnosing these kinds of issues. Let's see what's what.
16/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "sdio_bus_type =", "PathPrefix": "drivers/mmc" } Results: { "Output": "drivers/mmc/core/sdio_bus.c=244=static const struct dev_pm_ops sdio_bus_pm_ops = {\n--\ndrivers/mmc/core/sdio_bus.c-252-\ndrivers/mmc/core/sdio_bus.c:253:static const struct bus_type sdio_bus_type = {\ndrivers/mmc/core/sdio_bus.c-254-\t.name\t\t= \"sdio\",\n" }
17/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 26349 output: 41 thoughts: 21 Thoughts: Here's a summary of my thought process: Diving into the SDIO Bus Structure Okay, time to get my hands dirty and really understand how this SDIO bus thing is working. Let's start with the fundamental building block: the `sdio_bus_type` structure. I need to refresh my memory on the interactions within that code. It's been a while since I've reviewed `sdio_bus.c`. I know a deep understanding of this underlying bus type is crucial for everything else down the line, so this is where I'll begin my deep dive. I'll probably be making notes and cross-referencing other related areas. Let's see what gems are waiting to be uncovered.
18/2	2026/09/23 03:44	tool	read-file	0m Args: { "File": "drivers/mmc/core/sdio_bus.c", "FirstLine": 245, "LineCount": 40 } Results: { "Contents": " 245:\t\tSET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume)\n 246:\t\tSET_RUNTIME_PM_OPS(\n 247:\t\t\tpm_generic_runtime_suspend,\n 248:\t\t\tpm_generic_runtime_resume,\n 249:\t\t\tNULL\n 250:\t\t)\n 251:\t};\n 252:\t\n 253:\tstatic const struct bus_type sdio_bus_type = {\n 254:\t\t.name\t\t= \"sdio\",\n 255:\t\t.dev_groups\t= sdio_dev_groups,\n 256:\t\t.match\t\t= sdio_bus_match,\n 257:\t\t.uevent\t\t= sdio_bus_uevent,\n 258:\t\t.probe\t\t= sdio_bus_probe,\n 259:\t\t.remove\t\t= sdio_bus_remove,\n 260:\t\t.shutdown\t= sdio_bus_shutdown,\n 261:\t\t.pm\t\t= \u0026sdio_bus_pm_ops,\n 262:\t};\n 263:\t\n 264:\tint sdio_register_bus(void)\n 265:\t{\n 266:\t\treturn bus_register(\u0026sdio_bus_type);\n 267:\t}\n 268:\t\n 269:\tvoid sdio_unregister_bus(void)\n 270:\t{\n 271:\t\tbus_unregister(\u0026sdio_bus_type);\n 272:\t}\n 273:\t\n 274:\tstatic void sdio_legacy_shutdown(struct sdio_func func)\n 275:\t{\n 276:\t\tstruct device dev = \u0026func-\u003edev;\n 277:\t\tstruct device_driver driver = dev-\u003edriver;\n 278:\t\n 279:\t\tdriver-\u003eshutdown(dev);\n 280:\t}\n 281:\t\n 282:\t/\n 283:\t \t__sdio_register_driver - register a function driver\n 284:\t *\t@drv: SDIO function driver\n" }
19/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 27135 output: 28 thoughts: 73 Thoughts: Okay, here's my take on those thoughts, framed from my own perspective: SDIO Device Instantiation Concerns & RTL8723BS Portability Right, so I'm digging into this `sdio_bus_type` situation. My immediate concern is that I'm not seeing any typical userspace mechanisms to directly instantiate an SDIO device on that bus. Hmm, that's not ideal. It's making me wonder if I'm missing something fundamental or if there's a design constraint I'm overlooking here. Wait a second… before I dive too deep into custom implementations, I need to take a step back and consider the bigger picture. Is this specific `rtl8723bs` module only used with SDIO? Is it tied to other busses such as USB or PCI? It's crucial I don't overlook any potential reusability or dependencies across different system architectures. Okay, time to do a thorough check. I'm going to start by examining the entirety of the `drivers/staging/rtl8723bs` directory. I'll scour through the code, looking for any signs of cross-bus compatibility, potential drivers for USB or PCI (or anything else), and any related configuration files that might reveal its intended usage. Only with this full context can I decide if my initial assumption is correct, or if there's an easy win to be had. I need to understand its relationship to the kernel ecosystem before I can properly approach the task at hand.
20/2	2026/09/23 03:44	tool	codesearch-dir-index	0m Args: { "Dir": "drivers/staging/rtl8723bs" } Results: { "Files": null, "Subdirs": [ "core", "hal", "include", "os_dep" ] }
21/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 27589 output: 32 thoughts: 21 Thoughts: Here's my take on the thought process, summarized as you requested: Diving into the RTL8723BS Driver Source Okay, time to get my hands dirty. Let's start by digging into the `drivers/staging/rtl8723bs/os_dep` directory. That's the logical place to begin when I'm assessing this particular driver. I know that's where the OS-dependent code is going to live, the parts that interface with the kernel and handle things like memory management, interrupt handling, and other system-level interactions specific to the platform. By inspecting the files in that directory, I can quickly get a sense of how this driver is structured, how it's interacting with the underlying OS, and potentially identify any areas that might require attention or modification depending on the system in question. It's the first step in understanding the driver's integration and behavior.
22/2	2026/09/23 03:44	tool	codesearch-dir-index	0m Args: { "Dir": "drivers/staging/rtl8723bs/os_dep" } Results: { "Files": [ "ioctl_cfg80211.c", "os_intfs.c", "osdep_service.c", "sdio_intf.c", "sdio_ops_linux.c", "wifi_regd.c", "xmit_linux.c" ], "Subdirs": null }
23/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 27918 output: 38 thoughts: 29 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: Focused Investigation: SDIO Interface in RTL8723BS Driver Alright, the problem seems to be isolated to `sdio_intf.c`, which makes sense given the nature of the issue. Before I dive deep into that specific file, though, I always like to get the lay of the land first. So, the logical next step is to examine the associated build configuration. I'm going to quickly check the `drivers/staging/rtl8723bs/Makefile`. That should give me a high-level overview of how `sdio_intf.c` fits into the overall driver build, what dependencies it might have, and potentially any conditional compilation flags or module dependencies I should be aware of. Knowing the build context is crucial before I start debugging, and the Makefile is the perfect starting point to quickly understand how this module is built and linked. I'm expecting this will save me time in the long run.
24/2	2026/09/23 03:44	tool	read-file	0m Args: { "File": "drivers/staging/rtl8723bs/Makefile", "FirstLine": 1, "LineCount": 65 } Results: { "Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0\n 2:\tr8723bs-y = \\\n 3:\t\t\tcore/rtw_ap.o \\\n 4:\t\t\tcore/rtw_btcoex.o \\\n 5:\t\t \tcore/rtw_cmd.o \\\n 6:\t\t\tcore/rtw_efuse.o \\\n 7:\t\t\tcore/rtw_io.o \\\n 8:\t\t\tcore/rtw_ioctl_set.o \\\n 9:\t\t\tcore/rtw_ieee80211.o \\\n 10:\t\t\tcore/rtw_mlme.o \\\n 11:\t\t\tcore/rtw_mlme_ext.o \\\n 12:\t\t\tcore/rtw_pwrctrl.o \\\n 13:\t\t\tcore/rtw_recv.o \\\n 14:\t\t\tcore/rtw_security.o \\\n 15:\t\t\tcore/rtw_sta_mgt.o \\\n 16:\t\t\tcore/rtw_wlan_util.o \\\n 17:\t\t\tcore/rtw_xmit.o\t\\\n 18:\t\t\thal/hal_intf.o \\\n 19:\t\t\thal/hal_com.o \\\n 20:\t\t\thal/hal_com_phycfg.o \\\n 21:\t\t\thal/hal_btcoex.o \\\n 22:\t\t\thal/hal_sdio.o \\\n 23:\t\t\thal/hal_pwr_seq.o \\\n 24:\t\t\thal/HalPhyRf.o \\\n 25:\t\t\thal/HalPwrSeqCmd.o \\\n 26:\t\t\thal/odm.o \\\n 27:\t\t\thal/odm_CfoTracking.o \\\n 28:\t\t\thal/odm_DIG.o \\\n 29:\t\t\thal/odm_DynamicBBPowerSaving.o \\\n 30:\t\t\thal/odm_DynamicTxPower.o \\\n 31:\t\t\thal/odm_EdcaTurboCheck.o \\\n 32:\t\t\thal/odm_HWConfig.o \\\n 33:\t\t\thal/odm_RegConfig8723B.o \\\n 34:\t\t\thal/rtl8723b_cmd.o \\\n 35:\t\t\thal/rtl8723b_dm.o \\\n 36:\t\t\thal/rtl8723b_hal_init.o \\\n 37:\t\t\thal/rtl8723b_phycfg.o \\\n 38:\t\t\thal/rtl8723b_rf6052.o \\\n 39:\t\t\thal/rtl8723b_rxdesc.o \\\n 40:\t\t\thal/rtl8723bs_recv.o \\\n 41:\t\t\thal/rtl8723bs_xmit.o \\\n 42:\t\t\thal/sdio_halinit.o \\\n 43:\t\t\thal/sdio_ops.o \\\n 44:\t\t\thal/HalBtc8723b1Ant.o \\\n 45:\t\t\thal/HalBtc8723b2Ant.o \\\n 46:\t\t\thal/HalHWImg8723B_BB.o \\\n 47:\t\t\thal/HalHWImg8723B_MAC.o \\\n 48:\t\t\thal/HalHWImg8723B_RF.o \\\n 49:\t\t\thal/HalPhyRf_8723B.o \\\n 50:\t\t\tos_dep/ioctl_cfg80211.o \\\n 51:\t\t\tos_dep/osdep_service.o \\\n 52:\t\t\tos_dep/os_intfs.o \\\n 53:\t\t\tos_dep/sdio_intf.o \\\n 54:\t\t\tos_dep/sdio_ops_linux.o \\\n 55:\t\t\tos_dep/wifi_regd.o \\\n 56:\t\t\tos_dep/xmit_linux.o\n 57:\t\n 58:\tobj-$(CONFIG_RTL8723BS) := r8723bs.o\n 59:\t\n 60:\tccflags-y += -I$(src)/include -I$(src)/hal\n" }
25/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 29257 output: 22 thoughts: 111 Thoughts: Analyzing the Realtek 8723BS Driver Module Okay, let's dive in. I'm looking at `r8723bs.ko`. Hmm, it's only compiled if `CONFIG_RTL8723BS` is defined. Makes sense. It's an SDIO driver – specifically, `rtl8723bs_sdio_driver`. Now, a question arises in my mind: Are any of the functions defined within `rtw_ap.c` in the staging area exposed and accessible to the broader kernel? I need to check something like `rtw_check_beacon_data` or any other function in the `drivers/staging/rtl8723bs` directory. I'll need to confirm if these functions are exported.
26/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "rtw_check_beacon_data" } Results: { "Output": "drivers/staging/rtl8723bs/core/rtw_ap.c=609=void start_bss_network(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/core/rtw_ap.c-749-\ndrivers/staging/rtl8723bs/core/rtw_ap.c:750:int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len)\ndrivers/staging/rtl8723bs/core/rtw_ap.c-751-{\n--\ndrivers/staging/rtl8723bs/include/rtw_ap.h=17=void start_bss_network(struct adapter padapter);\ndrivers/staging/rtl8723bs/include/rtw_ap.h:18:int rtw_check_beacon_data(struct adapter padapter, u8 pbuf, int len);\ndrivers/staging/rtl8723bs/include/rtw_ap.h-19-void rtw_ap_restore_network(struct adapter padapter);\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2242=static int rtw_add_beacon(struct adapter adapter, const u8 head, size_t head_len, const u8 tail, size_t tail_len)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2270-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2271:\tif (rtw_check_beacon_data(adapter, pbuf, len) == _SUCCESS)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2272-\t\tret = 0;\n" }
27/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 30045 output: 36 thoughts: 100 Thoughts: Here's my thought process, as if I were analyzing this code: Deep Dive into Beacon Data Handling Okay, so `rtw_check_beacon_data`... I'm immediately noticing it's only called from `rtw_add_beacon`, and that call happens within `drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c`. That's a good starting point for understanding its execution path. Now, the key is remembering how `rtw_add_beacon` fits into the bigger picture. Right, it's part of the `cfg80211_ops` structure, and that structure is registered when the device probes. This means `rtw_add_beacon` is likely tied to the device's initialization and the configuration setup of 802.11 operations, which is important. To fully grasp the context, I'm going to quickly confirm where exactly `rtw_add_beacon` is being called and referenced. This will give a clearer picture of what triggers its execution and where any potential issues might arise in the beacon data handling.
28/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "rtw_add_beacon", "PathPrefix": "drivers/staging/rtl8723bs" } Results: { "Output": "drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2214=static int cfg80211_rtw_del_virtual_intf(struct wiphy wiphy,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2241-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2242:static int rtw_add_beacon(struct adapter adapter, const u8 head, size_t head_len, const u8 tail, size_t tail_len)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2243-{\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2281=static int cfg80211_rtw_start_ap(struct wiphy wiphy, struct net_device ndev,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2286-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2287:\tret = rtw_add_beacon(adapter, settings-\u003ebeacon.head,\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2288-\t\t\t settings-\u003ebeacon.head_len, settings-\u003ebeacon.tail,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2306=static int cfg80211_rtw_change_beacon(struct wiphy wiphy, struct net_device ndev,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2310-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2311:\treturn rtw_add_beacon(adapter, info-\u003ebeacon.head,\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2312-\t\t\t info-\u003ebeacon.head_len, info-\u003ebeacon.tail,\n" }
29/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 31027 output: 41 thoughts: 92 Thoughts: Here's my thought process, as if I were analyzing this code: Analyzing Beacon Configuration in the rtw Driver Okay, so I'm looking at how beacons are handled in this `rtw` driver. The core of it seems to hinge on `rtw_add_beacon`, which is definitely a key function. I see that it gets called from two places – `cfg80211_rtw_start_ap` and `cfg80211_rtw_change_beacon`. That gives me a handle on the two contexts where beacon updates are triggered. Now, I need to understand the relationship between those functions and the driver's overall structure. `cfg80211_rtw_start_ap` and `cfg80211_rtw_change_beacon` are clearly part of `rtw_cfg80211_ops`. Since they are defined in `rtw_cfg80211_ops`, this struct almost certainly contains the callback functions that interface the driver with the cfg80211 netlink interface. This means these methods, which in turn call `rtw_add_beacon`, are the entry points for beacon management via cfg80211. The next critical step is to trace the registration. I should look for where either `rtw_cfg80211_ops` or, more likely, the associated `wiphy` structure (which uses `rtw_cfg80211_ops`) is registered with the kernel. That will tell me how the driver is bound to the cfg80211 subsystem and how the upper layers talk to the driver. This registration is a crucial point; it is what provides a well defined interface for beacon management.
30/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "rtw_cfg80211_ops", "PathPrefix": "drivers/staging/rtl8723bs" } Results: { "Output": "drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2620=static void rtw_cfg80211_preinit_wiphy(struct adapter padapter, struct wiphy wiphy)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2662-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2663:static struct cfg80211_ops rtw_cfg80211_ops = {\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2664-\t.change_virtual_intf = cfg80211_rtw_change_iface,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2698=int rtw_wdev_alloc(struct adapter padapter, struct device dev)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2706-\t/* wiphy /\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2707:\twiphy = wiphy_new(\u0026rtw_cfg80211_ops, sizeof(struct adapter ));\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2708-\tif (!wiphy) {\n" }
31/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 31951 output: 37 thoughts: 33 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: Investigating the Probe Sequence Alright, so `rtw_wdev_alloc` – that rings a bell. And, if I'm remembering correctly, that's typically involved during the device probe sequence. This is important because it's where the initial setup of the wireless device happens, and any issues here can cascade into larger problems later. So, let's nail down precisely where `rtw_wdev_alloc` is being invoked. I need to trace its call sites to understand the context and what's leading up to its execution. Knowing the call path will provide valuable insight into what might be causing any anomalies I'm seeing. This is the first step in debugging the probe process.
32/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "rtw_wdev_alloc", "PathPrefix": "drivers/staging/rtl8723bs" } Results: { "Output": "drivers/staging/rtl8723bs/core/rtw_mlme.c=42=int rtw_init_mlme_priv(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/core/rtw_mlme.c-52-\tpmlmepriv-\u003epscanned = NULL;\ndrivers/staging/rtl8723bs/core/rtw_mlme.c:53:\tpmlmepriv-\u003efw_state = WIFI_STATION_STATE; / Must sync with rtw_wdev_alloc() /\ndrivers/staging/rtl8723bs/core/rtw_mlme.c-54-\tpmlmepriv-\u003ecur_network.network.infrastructure_mode = NL80211_IFTYPE_UNSPECIFIED;\n--\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h=10=struct rtw_wdev_priv {\n--\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h-28-\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h:29:int rtw_wdev_alloc(struct adapter padapter, struct device dev);\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h-30-void rtw_wdev_free(struct wireless_dev wdev);\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2663=static struct cfg80211_ops rtw_cfg80211_ops = {\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2697-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2698:int rtw_wdev_alloc(struct adapter padapter, struct device dev)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2699-{\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=218=static struct adapter rtw_sdio_if1_init(struct dvobj_priv dvobj)\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-276-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:277:\trtw_wdev_alloc(padapter, dvobj_to_dev(dvobj));\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-278-\n" }
33/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 32896 output: 50 thoughts: 80 Thoughts: Here's my understanding of the situation, given my expertise: Dissecting the RTL8723BS SDIO Initialization Okay, so I'm tracing the initialization of the SDIO interface for the RTL8723BS driver. Specifically, `rtw_sdio_if1_init` is the function of interest. The call stack appears to be: `rtw_drv_init` calls `rtw_sdio_if1_init`. And, `rtw_drv_init` itself is called during the `.probe` stage of the `rtl8723bs_sdio_driver`. Now, let's head over to `drivers/staging/rtl8723bs/os_dep/sdio_intf.c` where I'm going to find the implementation of `rtw_drv_init` to get the lay of the land and understand exactly how this SDIO interface is being set up within the overall driver initialization sequence. This will reveal the critical initialization steps. From there I'll be able to work backward and verify all the supporting code.
34/2	2026/09/23 03:44	tool	read-file	0m Args: { "File": "drivers/staging/rtl8723bs/os_dep/sdio_intf.c", "FirstLine": 310, "LineCount": 80 } Results: { "Contents": " 310:\t\tstruct net_device pnetdev = if1-\u003epnetdev;\n 311:\t\tstruct mlme_priv pmlmepriv = \u0026if1-\u003emlmepriv;\n 312:\t\n 313:\t\tif (check_fwstate(pmlmepriv, _FW_LINKED))\n 314:\t\t\trtw_disassoc_cmd(if1, 0, false);\n 315:\t\n 316:\t\tfree_mlme_ap_info(if1);\n 317:\t\n 318:\t\trtw_cancel_all_timer(if1);\n 319:\t\n 320:\t\trtw_dev_unload(if1);\n 321:\t\n 322:\t\tif (if1-\u003ertw_wdev)\n 323:\t\t\trtw_wdev_free(if1-\u003ertw_wdev);\n 324:\t\n 325:\t\trtw_free_drv_sw(if1);\n 326:\t\n 327:\t\tif (pnetdev)\n 328:\t\t\trtw_free_netdev(pnetdev);\n 329:\t}\n 330:\t\n 331:\t/\n 332:\t drv_init() - a device potentially for us\n 333:\t \n 334:\t notes: drv_init() is called when the bus driver has located a card for us to support.\n 335:\t * We accept the new device by returning 0.\n 336:\t /\n 337:\tstatic int rtw_drv_init(struct sdio_func func,\n 338:\t\t\t\tconst struct sdio_device_id id)\n 339:\t{\n 340:\t\tint status = _FAIL;\n 341:\t\tstruct adapter if1 = NULL;\n 342:\t\tstruct dvobj_priv dvobj;\n 343:\t\n 344:\t\tdvobj = sdio_dvobj_init(func);\n 345:\t\tif (!dvobj)\n 346:\t\t\tgoto exit;\n 347:\t\n 348:\t\tif1 = rtw_sdio_if1_init(dvobj);\n 349:\t\tif (!if1)\n 350:\t\t\tgoto free_dvobj;\n 351:\t\n 352:\t\t/ dev_alloc_name \u0026\u0026 register_netdev /\n 353:\t\tstatus = rtw_drv_register_netdev(if1);\n 354:\t\tif (status != _SUCCESS)\n 355:\t\t\tgoto free_if1;\n 356:\t\n 357:\t\tstatus = sdio_alloc_irq(dvobj);\n 358:\t\tif (status != _SUCCESS)\n 359:\t\t\tgoto free_netdev;\n 360:\t\n 361:\t\tstatus = _SUCCESS;\n 362:\t\n 363:\tfree_netdev:\n 364:\t\tif (status != _SUCCESS)\n 365:\t\t\trtw_unregister_netdevs(dvobj);\n 366:\tfree_if1:\n 367:\t\tif (status != _SUCCESS \u0026\u0026 if1)\n 368:\t\t\trtw_sdio_if1_deinit(if1);\n 369:\t\n 370:\tfree_dvobj:\n 371:\t\tif (status != _SUCCESS)\n 372:\t\t\tsdio_dvobj_deinit(func);\n 373:\texit:\n 374:\t\treturn status == _SUCCESS ? 0 : -ENODEV;\n 375:\t}\n 376:\t\n 377:\tstatic void rtw_dev_remove(struct sdio_func func)\n 378:\t{\n 379:\t\tstruct dvobj_priv dvobj = sdio_get_drvdata(func);\n 380:\t\tstruct adapter padapter = dvobj-\u003eif1;\n 381:\t\n 382:\t\tdvobj-\u003eprocessing_dev_remove = true;\n 383:\t\n 384:\t\trtw_unregister_netdevs(dvobj);\n 385:\t\n 386:\t\tif (!padapter-\u003ebSurpriseRemoved) {\n 387:\t\t\tint err;\n 388:\t\n 389:\t\t\t/* test surprise remove */\n" }
35/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 34410 output: 20 thoughts: 798 Thoughts: RTL8723BS Fuzzing Feasibility Analysis Okay, let's break this down. My immediate concern is whether `rtl8723bs` is even reachable in a fuzzing setup. The core triage philosophy is clear: reachability is paramount. If the code can't execute in a standard virtualized environment like GCE or QEMU, we're wasting our time. We're looking for software-emulated devices, things like USB gadgets, netdev, or tun/tap. My understanding of the negative criteria is pretty straightforward, specifically, we need to ask if the modified code falls into any "structurally unreachable hardware" categories. Does `rtl8723bs` fall into this category? First, I need to know: can SDIO drivers be reached in syzkaller? Syzkaller's device support is key. Let's see... Ah, it supports virtual devices like USB, Bluetooth, and WiFi. But what about this WiFi driver? Syzkaller's WiFi support uses `mac80211_hwsim`. Does that help? No, `mac80211_hwsim` is a completely separate software driver. It creates virtual wiphy/netdev devices, but does it use `rtl8723bs`? No. And `rtl8723bs` doesn't even use `mac80211`. It registers directly with `cfg80211`. That's not the problem. The problem is it only attaches to SDIO hardware and specific Realtek IDs: 0x024c, 0x0523, etc. This is the crucial point! Can QEMU or GCE emulate this Realtek RTL8723BS SDIO card? I don't believe so. QEMU does not emulate RTL8723BS SDIO cards. Therefore, it seems, it is hardware dependent. The next question: Does Linux have any software emulation for SDIO devices, similar to how we have raw-gadget for USB or vhci for BT? I need to investigate that angle next.
36/2	2026/09/23 03:44	tool	grepper	0m Error: no matches Args: { "Expression": "sdio_.emulat" } Results:* { "error": "no matches" }
37/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 35707 output: 30 thoughts: 601 Thoughts: Analyzing the RTL8723BS SDIO Driver Changes Okay, first things first, let's see if syzkaller has any direct references to "sdio." But wait, I recall the instructions mentioning that this tool isn't supposed to be used on syzlang descriptions or expressions including "long syz_." Those are pseudo-syscalls and aren't in the Linux kernel. The instructions directed me to use `read-syz-spec` and `syz-grepper` instead. Hmm, are those even available? Let me quickly check the declarations – nope, they're not. We only have `grepper`, `codesearch-dir-index`, `read-file`, and `set-results`. So, no `syz-grepper` for me today. Alright, let's switch gears and examine the patch itself. The diff focuses on `drivers/staging/rtl8723bs/core/rtw_ap.c`. The changes seem to be in the `rtw_check_beacon_data` function, specifically related to the beacon data length checks and how vendor-specific information elements (IEs) are handled. It looks like a length check is being tightened, and `rtw_get_ie` is being replaced by `rtw_get_ie_ex` with length adjustments. Now, a key question: is anything else built from `drivers/staging/rtl8723bs` besides `r8723bs.ko`? Checking the `Makefile`, it's clear that only `r8723bs.o` is created there. And, based on my knowledge and that of the kernel, `r8723bs` is indeed the driver for the Realtek RTL8723BS SDIO Wireless LAN NIC. I need to quickly confirm that it is defined in the Kconfig.
38/2	2026/09/23 03:44	tool	grepper	0m Args: { "Expression": "RTL8723BS", "PathPrefix": "drivers/staging" } Results: { "Output": "drivers/staging/Makefile=4=obj-y\t\t\t\t+= media/\ndrivers/staging/Makefile:5:obj-$(CONFIG_RTL8723BS)\t\t+= rtl8723bs/\ndrivers/staging/Makefile-6-obj-$(CONFIG_OCTEON_ETHERNET)\t+= octeon/\n--\ndrivers/staging/rtl8723bs/Kconfig-1-# SPDX-License-Identifier: GPL-2.0\ndrivers/staging/rtl8723bs/Kconfig:2:config RTL8723BS\ndrivers/staging/rtl8723bs/Kconfig:3:\ttristate \"Realtek RTL8723BS SDIO Wireless LAN NIC driver\"\ndrivers/staging/rtl8723bs/Kconfig-4-\tdepends on WLAN \u0026\u0026 MMC \u0026\u0026 CFG80211\n--\ndrivers/staging/rtl8723bs/Kconfig-9-\thelp\ndrivers/staging/rtl8723bs/Kconfig:10:\tThis option enables support for RTL8723BS SDIO drivers, such as\ndrivers/staging/rtl8723bs/Kconfig-11-\tthe wifi found on the 1st gen Intel Compute Stick, the CHIP\n--\ndrivers/staging/rtl8723bs/Makefile=2=r8723bs-y = \\\n--\ndrivers/staging/rtl8723bs/Makefile-57-\ndrivers/staging/rtl8723bs/Makefile:58:obj-$(CONFIG_RTL8723BS) := r8723bs.o\ndrivers/staging/rtl8723bs/Makefile-59-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=561=u32 rtl8723bs_hal_init(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-806-/ /\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:807:static void CardDisableRTL8723BSdio(struct adapter padapter)\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-808-{\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=853=u32 rtl8723bs_hal_deinit(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-892-\t\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:893:\t\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-894-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-898-\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:899:\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-900-\t\t}\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=1053=static s32 _ReadAdapterInfo8723BS(struct adapter padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1075-\t\t /\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:1076:\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1077-\t}\n--\ndrivers/staging/rtl8723bs/include/hal_pg.h-42-\ndrivers/staging/rtl8723bs/include/hal_pg.h:43:/ RTL8723BS */\ndrivers/staging/rtl8723bs/include/hal_pg.h-44-#define\tEEPROM_MAC_ADDR_8723BS\t\t\t0x11A\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=463=module_exit(rtw_drv_halt);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-464-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:465:MODULE_DESCRIPTION(\"Realtek RTL8723BS SDIO WiFi driver\");\n" }
39/2	2026/09/23 03:44	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 37910 output: 20 thoughts: 34 Thoughts: Here's my thought process, as if I were considering this myself: Investigating Dependencies and Potential Conflicts Okay, so I need to figure out what else in this system interacts with `rtw_ap.h` or, more broadly, the `rtl8723bs` module. I need to be absolutely sure there aren't any hidden dependencies or conflicts lurking that could cause problems. I'll need to go beyond the immediate area I'm focusing on. It's time to start searching the codebase to determine the scope of this file's usage, and the use of the module. Knowing all the points of contact is critical to avoiding unintended consequences. Gotta be thorough.
40/2	2026/09/23 03:45	tool	grepper	0m Args: { "Expression": "rtw_ap.h" } Results: { "Output": "drivers/staging/rtl8723bs/include/drv_types.h-48-#include \u003crtw_mlme_ext.h\u003e\ndrivers/staging/rtl8723bs/include/drv_types.h:49:#include \u003crtw_ap.h\u003e\ndrivers/staging/rtl8723bs/include/drv_types.h-50-#include \u003crtw_version.h\u003e\n" }
41/2	2026/09/23 03:45	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 38221 output: 150 thoughts: 855 Thoughts: WorthFuzzing Decision for rtw_check_beacon_data Okay, let's break this down systematically. I see that `rtw_ap.h` is only included within `drv_types.h` which is internal to the `rtl8723bs` module. I need to figure out if this is fuzzable. First, the `r8723bs` driver is, in fact, specifically for the Realtek RTL8723BS SDIO Wireless LAN NIC. SDIO devices require physical hardware connected to an MMC/SDIO host controller. Now, I know that neither standard QEMU nor Google Compute Engine (GCE) virtual machines emulate this specific RTL8723BS SDIO device—they don't emulate SDIO WiFi cards at all. And, critically, there's no software emulation mechanism in Linux or syzkaller for SDIO peripheral devices, unlike the USB situation with `dummy_hcd` and `raw-gadget`. Thinking about the fuzzing guidelines, the core triage philosophy says reachability is the primary gate. If the code is unreachable in standard virtualized environments, we shouldn't fuzz it. Specifically, it mentions structurally unreachable hardware like vendor-specific PCIe switches or drivers requiring physical cards. The RTL8723BS clearly falls into this category: it's a driver for specific physical hardware. Since neither QEMU nor GCE emulates the RTL8723BS SDIO hardware, and there's no SDIO emulation in Linux, the driver can never probe. Therefore, the code, including `rtw_check_beacon_data`, is structurally unreachable. This means `WorthFuzzing` has to be `false`. Given `WorthFuzzing=false`, the guidelines suggest `FocusSymbols` and `EnableConfigs` should be empty arrays (or `null`). I've checked the schema and this aligns with what's expected. To solidify this, I'm confirming that the patch does modify `rtw_check_beacon_data` in `drivers/staging/rtl8723bs/core/rtw_ap.c`. That file's part of the `r8723bs` module, `CONFIG_RTL8723BS`, which, again, is for the RTL8723BS SDIO card. With no SDIO emulation, the code's unreachable in fuzzing environments. Okay, that's rock solid. I'm ready to call `set-results`.
42/2	2026/09/23 03:45	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.", "WorthFuzzing": false }
43/1	2026/09/23 03:45	action	If	0m Args: { "WorthFuzzing": false } Results: null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.",
  "WorthFuzzing": false
}

{
  "PatchDiff": "commit 9b58714bd32c27ef1a2d65f52db2227923e199eb\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Sep 23 03:43:01 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c\nindex 4728f62a15578..70e95b07ca2a1 100644\n--- a/drivers/staging/rtl8723bs/core/rtw_ap.c\n+++ b/drivers/staging/rtl8723bs/core/rtw_ap.c\n@@ -771,7 +771,7 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)\n \tif (!check_fwstate(pmlmepriv, WIFI_AP_STATE))\n \t\treturn _FAIL;\n \n-\tif (len \u003c 0 || len \u003e MAX_IE_SZ)\n+\tif (len \u003c _BEACON_IE_OFFSET_ || len \u003e MAX_IE_SZ)\n \t\treturn _FAIL;\n \n \tpbss_network-\u003eie_length = len;\n@@ -885,61 +885,46 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)\n \tgroup_cipher = 0; pairwise_cipher = 0;\n \tpsecuritypriv-\u003ewpa_group_cipher = _NO_PRIVACY_;\n \tpsecuritypriv-\u003ewpa_pairwise_cipher = _NO_PRIVACY_;\n-\tfor (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {\n-\t\tp = rtw_get_ie(p,\n-\t\t\t       WLAN_EID_VENDOR_SPECIFIC,\n-\t\t\t       \u0026ie_len,\n-\t\t\t       (pbss_network-\u003eie_length - _BEACON_IE_OFFSET_ - (ie_len + 2)));\n-\t\tif ((p) \u0026\u0026 (!memcmp(p + 2, OUI1, 4))) {\n-\t\t\tif (rtw_parse_wpa_ie(p,\n-\t\t\t\t\t     ie_len + 2,\n-\t\t\t\t\t     \u0026group_cipher,\n-\t\t\t\t\t     \u0026pairwise_cipher,\n-\t\t\t\t\t     NULL) == _SUCCESS) {\n-\t\t\t\tpsecuritypriv-\u003edot11_auth_algrthm = dot11_auth_algrthm_8021x;\n-\n-\t\t\t\tpsecuritypriv-\u003edot8021xalg = 1;/* psk,  todo:802.1x */\n-\n-\t\t\t\tpsecuritypriv-\u003ewpa_psk |= BIT(0);\n-\n-\t\t\t\tpsecuritypriv-\u003ewpa_group_cipher = group_cipher;\n-\t\t\t\tpsecuritypriv-\u003ewpa_pairwise_cipher = pairwise_cipher;\n-\t\t\t}\n+\tp = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,\n+\t\t\t  pbss_network-\u003eie_length - _BEACON_IE_OFFSET_,\n+\t\t\t  WLAN_EID_VENDOR_SPECIFIC,\n+\t\t\t  OUI1, sizeof(OUI1), NULL, \u0026ie_len);\n+\tif (p) {\n+\t\tif (rtw_parse_wpa_ie(p,\n+\t\t\t\t     ie_len,\n+\t\t\t\t     \u0026group_cipher,\n+\t\t\t\t     \u0026pairwise_cipher,\n+\t\t\t\t     NULL) == _SUCCESS) {\n+\t\t\tpsecuritypriv-\u003edot11_auth_algrthm = dot11_auth_algrthm_8021x;\n \n-\t\t\tbreak;\n-\t\t}\n+\t\t\tpsecuritypriv-\u003edot8021xalg = 1;/* psk,  todo:802.1x */\n \n-\t\tif (!p || ie_len == 0)\n-\t\t\tbreak;\n+\t\t\tpsecuritypriv-\u003ewpa_psk |= BIT(0);\n+\n+\t\t\tpsecuritypriv-\u003ewpa_group_cipher = group_cipher;\n+\t\t\tpsecuritypriv-\u003ewpa_pairwise_cipher = pairwise_cipher;\n+\t\t}\n \t}\n \n \t/* wmm */\n \tie_len = 0;\n \tpmlmepriv-\u003eqospriv.qos_option = 0;\n \tif (pregistrypriv-\u003ewmm_enable) {\n-\t\tfor (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {\n-\t\t\tp = rtw_get_ie(p,\n-\t\t\t\t       WLAN_EID_VENDOR_SPECIFIC,\n-\t\t\t\t       \u0026ie_len,\n-\t\t\t\t       (pbss_network-\u003eie_length -\n-\t\t\t\t\t_BEACON_IE_OFFSET_ - (ie_len + 2)));\n-\t\t\tif ((p) \u0026\u0026 !memcmp(p + 2, WMM_PARA_IE, 6)) {\n-\t\t\t\tpmlmepriv-\u003eqospriv.qos_option = 1;\n-\n-\t\t\t\t*(p + 8) |= BIT(7);/* QoS Info, support U-APSD */\n-\n-\t\t\t\t/* disable all ACM bits since the WMM admission */\n-\t\t\t\t/* control is not supported */\n-\t\t\t\t*(p + 10) \u0026= ~BIT(4); /* BE */\n-\t\t\t\t*(p + 14) \u0026= ~BIT(4); /* BK */\n-\t\t\t\t*(p + 18) \u0026= ~BIT(4); /* VI */\n-\t\t\t\t*(p + 22) \u0026= ~BIT(4); /* VO */\n-\n-\t\t\t\tbreak;\n-\t\t\t}\n-\n-\t\t\tif (!p || ie_len == 0)\n-\t\t\t\tbreak;\n+\t\tp = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,\n+\t\t\t\t  pbss_network-\u003eie_length - _BEACON_IE_OFFSET_,\n+\t\t\t\t  WLAN_EID_VENDOR_SPECIFIC,\n+\t\t\t\t  WMM_PARA_IE, sizeof(WMM_PARA_IE), NULL, \u0026ie_len);\n+\t\tif (p \u0026\u0026 ie_len \u003e= WLAN_WMM_LEN + 2) {\n+\t\t\tpmlmepriv-\u003eqospriv.qos_option = 1;\n+\n+\t\t\t*(p + 8) |= BIT(7);/* QoS Info, support U-APSD */\n+\n+\t\t\t/* disable all ACM bits since the WMM admission */\n+\t\t\t/* control is not supported */\n+\t\t\t*(p + 10) \u0026= ~BIT(4); /* BE */\n+\t\t\t*(p + 14) \u0026= ~BIT(4); /* BK */\n+\t\t\t*(p + 18) \u0026= ~BIT(4); /* VI */\n+\t\t\t*(p + 22) \u0026= ~BIT(4); /* VO */\n \t\t}\n \t}\n \n"
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.",
  "WorthFuzzing": false
}

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.

Target architecture: amd64

For your convenience, here is the diff of the changes:
commit 9b58714bd32c27ef1a2d65f52db2227923e199eb
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Sep 23 03:43:01 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c
index 4728f62a15578..70e95b07ca2a1 100644
--- a/drivers/staging/rtl8723bs/core/rtw_ap.c
+++ b/drivers/staging/rtl8723bs/core/rtw_ap.c
@@ -771,7 +771,7 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)
 	if (!check_fwstate(pmlmepriv, WIFI_AP_STATE))
 		return _FAIL;
 
-	if (len < 0 || len > MAX_IE_SZ)
+	if (len < _BEACON_IE_OFFSET_ || len > MAX_IE_SZ)
 		return _FAIL;
 
 	pbss_network->ie_length = len;
@@ -885,61 +885,46 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)
 	group_cipher = 0; pairwise_cipher = 0;
 	psecuritypriv->wpa_group_cipher = _NO_PRIVACY_;
 	psecuritypriv->wpa_pairwise_cipher = _NO_PRIVACY_;
-	for (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {
-		p = rtw_get_ie(p,
-			       WLAN_EID_VENDOR_SPECIFIC,
-			       &ie_len,
-			       (pbss_network->ie_length - _BEACON_IE_OFFSET_ - (ie_len + 2)));
-		if ((p) && (!memcmp(p + 2, OUI1, 4))) {
-			if (rtw_parse_wpa_ie(p,
-					     ie_len + 2,
-					     &group_cipher,
-					     &pairwise_cipher,
-					     NULL) == _SUCCESS) {
-				psecuritypriv->dot11_auth_algrthm = dot11_auth_algrthm_8021x;
-
-				psecuritypriv->dot8021xalg = 1;/* psk,  todo:802.1x */
-
-				psecuritypriv->wpa_psk |= BIT(0);
-
-				psecuritypriv->wpa_group_cipher = group_cipher;
-				psecuritypriv->wpa_pairwise_cipher = pairwise_cipher;
-			}
+	p = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,
+			  pbss_network->ie_length - _BEACON_IE_OFFSET_,
+			  WLAN_EID_VENDOR_SPECIFIC,
+			  OUI1, sizeof(OUI1), NULL, &ie_len);
+	if (p) {
+		if (rtw_parse_wpa_ie(p,
+				     ie_len,
+				     &group_cipher,
+				     &pairwise_cipher,
+				     NULL) == _SUCCESS) {
+			psecuritypriv->dot11_auth_algrthm = dot11_auth_algrthm_8021x;
 
-			break;
-		}
+			psecuritypriv->dot8021xalg = 1;/* psk,  todo:802.1x */
 
-		if (!p || ie_len == 0)
-			break;
+			psecuritypriv->wpa_psk |= BIT(0);
+
+			psecuritypriv->wpa_group_cipher = group_cipher;
+			psecuritypriv->wpa_pairwise_cipher = pairwise_cipher;
+		}
 	}
 
 	/* wmm */
 	ie_len = 0;
 	pmlmepriv->qospriv.qos_option = 0;
 	if (pregistrypriv->wmm_enable) {
-		for (p = ie + _BEACON_IE_OFFSET_; ; p += (ie_len + 2)) {
-			p = rtw_get_ie(p,
-				       WLAN_EID_VENDOR_SPECIFIC,
-				       &ie_len,
-				       (pbss_network->ie_length -
-					_BEACON_IE_OFFSET_ - (ie_len + 2)));
-			if ((p) && !memcmp(p + 2, WMM_PARA_IE, 6)) {
-				pmlmepriv->qospriv.qos_option = 1;
-
-				*(p + 8) |= BIT(7);/* QoS Info, support U-APSD */
-
-				/* disable all ACM bits since the WMM admission */
-				/* control is not supported */
-				*(p + 10) &= ~BIT(4); /* BE */
-				*(p + 14) &= ~BIT(4); /* BK */
-				*(p + 18) &= ~BIT(4); /* VI */
-				*(p + 22) &= ~BIT(4); /* VO */
-
-				break;
-			}
-
-			if (!p || ie_len == 0)
-				break;
+		p = rtw_get_ie_ex(ie + _BEACON_IE_OFFSET_,
+				  pbss_network->ie_length - _BEACON_IE_OFFSET_,
+				  WLAN_EID_VENDOR_SPECIFIC,
+				  WMM_PARA_IE, sizeof(WMM_PARA_IE), NULL, &ie_len);
+		if (p && ie_len >= WLAN_WMM_LEN + 2) {
+			pmlmepriv->qospriv.qos_option = 1;
+
+			*(p + 8) |= BIT(7);/* QoS Info, support U-APSD */
+
+			/* disable all ACM bits since the WMM admission */
+			/* control is not supported */
+			*(p + 10) &= ~BIT(4); /* BE */
+			*(p + 14) &= ~BIT(4); /* BK */
+			*(p + 18) &= ~BIT(4); /* VI */
+			*(p + 22) &= ~BIT(4); /* VO */
 		}
 	}

							input: 4266
							output: 37
							thoughts: 206

**Fuzzing Triage: RTL8723bs Driver Patch Evaluation**

Okay, so I've got this patch series in front of me and the question is whether it's worth fuzzing with syzkaller. First things first, let's establish some basic safety. This is just a standard code review/fuzzing triage task; nothing that jumps out as malicious or exploit-related. Good. Benign.

Now, let's dive into the diff. The patch seems to be touching `drivers/staging/rtl8723bs/core/rtw_ap.c`. And specifically, a function called `rtw_check_beacon_data`. Right, sounds like a good place to start digging for potential issues.

Wait a second… `rtl8723bs`? My mind immediately goes to the driver itself. Is this an SDIO WiFi driver? I should quickly confirm what this driver is. Let me search the codebase for that exact string. Alright, let's double-check the Kconfig and see what's in `drivers/staging/rtl8723bs`. That will give me a better understanding of what kind of hardware this is intended for and the context of the code. This is a critical step before making a judgement call.

{
  "Expression": "RTL8723BS",
  "PathPrefix": "drivers/staging/rtl8723bs"
}

{
  "Output": "drivers/staging/rtl8723bs/Kconfig-1-# SPDX-License-Identifier: GPL-2.0\ndrivers/staging/rtl8723bs/Kconfig:2:config RTL8723BS\ndrivers/staging/rtl8723bs/Kconfig:3:\ttristate \"Realtek RTL8723BS SDIO Wireless LAN NIC driver\"\ndrivers/staging/rtl8723bs/Kconfig-4-\tdepends on WLAN \u0026\u0026 MMC \u0026\u0026 CFG80211\n--\ndrivers/staging/rtl8723bs/Kconfig-9-\thelp\ndrivers/staging/rtl8723bs/Kconfig:10:\tThis option enables support for RTL8723BS SDIO drivers, such as\ndrivers/staging/rtl8723bs/Kconfig-11-\tthe wifi found on the 1st gen Intel Compute Stick, the CHIP\n--\ndrivers/staging/rtl8723bs/Makefile=2=r8723bs-y = \\\n--\ndrivers/staging/rtl8723bs/Makefile-57-\ndrivers/staging/rtl8723bs/Makefile:58:obj-$(CONFIG_RTL8723BS) := r8723bs.o\ndrivers/staging/rtl8723bs/Makefile-59-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=561=u32 rtl8723bs_hal_init(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-806-/*  */\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:807:static void CardDisableRTL8723BSdio(struct adapter *padapter)\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-808-{\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=853=u32 rtl8723bs_hal_deinit(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-892-\t\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:893:\t\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-894-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-898-\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:899:\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-900-\t\t}\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=1053=static s32 _ReadAdapterInfo8723BS(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1075-\t\t */\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:1076:\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1077-\t}\n--\ndrivers/staging/rtl8723bs/include/hal_pg.h-42-\ndrivers/staging/rtl8723bs/include/hal_pg.h:43:/* RTL8723BS */\ndrivers/staging/rtl8723bs/include/hal_pg.h-44-#define\tEEPROM_MAC_ADDR_8723BS\t\t\t0x11A\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=463=module_exit(rtw_drv_halt);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-464-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:465:MODULE_DESCRIPTION(\"Realtek RTL8723BS SDIO WiFi driver\");\n"
}

							input: 5871
							output: 48
							thoughts: 299

**RTL8723BS Driver Reachability Analysis**

Okay, so the RTL8723BS is an SDIO Wireless LAN NIC driver. The dependencies are `WLAN`, `MMC`, and `CFG80211`. My immediate thought is, "Can I even get at this thing in syzkaller or a standard virtualized environment like GCE or QEMU?" I need to figure out if it's reachable.

The document emphasizes reachability as the key factor. If the code's structurally unreachable in standard virtualized environments, it's a no-go for fuzzing, no matter how tempting it seems. Section 2 highlights the "negative criteria," specifically mentioning structurally unreachable hardware. We're talking about things like vendor-specific PCIe switches or SmartNICs, the ones that need physical ASIC/PCIe cards that QEMU doesn't emulate.

Now, the question is: how is the RTL8723BS probed? Is it through SDIO? And crucially, *can* SDIO be emulated or probed? Or does this require physical SDIO hardware? I need to dig into the driver's implementation. Let's see...I should look into `drivers/staging/rtl8723bs/os_dep/sdio_intf.c` to understand how it interacts with the SDIO interface. That will tell the tale.

{
  "File": "drivers/staging/rtl8723bs/os_dep/sdio_intf.c",
  "FirstLine": 1,
  "LineCount": 80
}

{
  "Contents": "   1:\t// SPDX-License-Identifier: GPL-2.0\n   2:\t/******************************************************************************\n   3:\t *\n   4:\t * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.\n   5:\t *\n   6:\t ******************************************************************************/\n   7:\t#include \u003cdrv_types.h\u003e\n   8:\t#include \u003chal_btcoex.h\u003e\n   9:\t#include \u003chal_data.h\u003e\n  10:\t#include \u003clinux/jiffies.h\u003e\n  11:\t\n  12:\t#ifndef dev_to_sdio_func\n  13:\t#define dev_to_sdio_func(d)     container_of(d, struct sdio_func, dev)\n  14:\t#endif\n  15:\t\n  16:\tstatic const struct sdio_device_id sdio_ids[] = {\n  17:\t\t{ SDIO_DEVICE(0x024c, 0x0523), },\n  18:\t\t{ SDIO_DEVICE(0x024c, 0x0525), },\n  19:\t\t{ SDIO_DEVICE(0x024c, 0x0623), },\n  20:\t\t{ SDIO_DEVICE(0x024c, 0x0626), },\n  21:\t\t{ SDIO_DEVICE(0x024c, 0x0627), },\n  22:\t\t{ SDIO_DEVICE(0x024c, 0xb723), },\n  23:\t\t{ /* end: all zeroes */\t\t\t\t},\n  24:\t};\n  25:\tMODULE_DEVICE_TABLE(sdio, sdio_ids);\n  26:\t\n  27:\tstatic int rtw_drv_init(struct sdio_func *func, const struct sdio_device_id *id);\n  28:\tstatic void rtw_dev_remove(struct sdio_func *func);\n  29:\tstatic int rtw_sdio_resume(struct device *dev);\n  30:\tstatic int rtw_sdio_suspend(struct device *dev);\n  31:\t\n  32:\tstatic const struct dev_pm_ops rtw_sdio_pm_ops = {\n  33:\t\t.suspend\t= rtw_sdio_suspend,\n  34:\t\t.resume\t= rtw_sdio_resume,\n  35:\t};\n  36:\t\n  37:\tstatic struct sdio_driver rtl8723bs_sdio_driver = {\n  38:\t\t.probe = rtw_drv_init,\n  39:\t\t.remove = rtw_dev_remove,\n  40:\t\t.name = \"rtl8723bs\",\n  41:\t\t.id_table = sdio_ids,\n  42:\t\t.drv = {\n  43:\t\t\t.pm = \u0026rtw_sdio_pm_ops,\n  44:\t\t}\n  45:\t};\n  46:\t\n  47:\tstatic void sd_sync_int_hdl(struct sdio_func *func)\n  48:\t{\n  49:\t\tstruct dvobj_priv *psdpriv;\n  50:\t\n  51:\t\n  52:\t\tpsdpriv = sdio_get_drvdata(func);\n  53:\t\n  54:\t\tif (!psdpriv-\u003eif1)\n  55:\t\t\treturn;\n  56:\t\n  57:\t\trtw_sdio_set_irq_thd(psdpriv, current);\n  58:\t\tsd_int_hdl(psdpriv-\u003eif1);\n  59:\t\trtw_sdio_set_irq_thd(psdpriv, NULL);\n  60:\t}\n  61:\t\n  62:\tstatic int sdio_alloc_irq(struct dvobj_priv *dvobj)\n  63:\t{\n  64:\t\tstruct sdio_data *psdio_data;\n  65:\t\tstruct sdio_func *func;\n  66:\t\tint err;\n  67:\t\n  68:\t\tpsdio_data = \u0026dvobj-\u003eintf_data;\n  69:\t\tfunc = psdio_data-\u003efunc;\n  70:\t\n  71:\t\tsdio_claim_host(func);\n  72:\t\n  73:\t\terr = sdio_claim_irq(func, \u0026sd_sync_int_hdl);\n  74:\t\tif (err)\n  75:\t\t\tnetdev_crit(dvobj-\u003eif1-\u003epnetdev, \"%s: sdio_claim_irq FAIL(%d)!\\n\", __func__, err);\n  76:\t\telse\n  77:\t\t\tdvobj-\u003eirq_alloc = 1;\n  78:\t\n  79:\t\tsdio_release_host(func);\n  80:\t\n"
}

							input: 7770
							output: 20
							thoughts: 197

**SDIO Driver Inquiry**

Okay, so I'm looking at this `sdio_driver rtl8723bs_sdio_driver` and the first question that pops into my head is, can I even instantiate an SDIO driver like this in a virtualized environment like GCE or with QEMU, especially within a syzkaller context? My intuition is screaming that SDIO requires physical hardware, but I need to be sure. I'm immediately wondering if syzkaller has any built-in SDIO emulation.

Right, of course, syzkaller primarily leverages standard QEMU or GCE instances. It handles virtual buses through mechanisms I'm familiar with – dummy_hcd for USB, netdev/tun/tap, virtio, loopback, netlink, binder, sockets, and so on. SDIO isn't directly in that list, though. Okay, so if it's not directly supported, could I possibly fake it? Maybe emulate an SDIO device over USB or something similar, connecting through something I *do* have? No, hold on. SDIO is tied to the MMC/SDIO bus. It's fundamentally different.

Alright, so if I can't emulate it directly, what about creating SDIO cards from userspace? Can I make a virtual SDIO host/device? Does the Linux kernel even have facilities for something like that? It's time to dig into the kernel source. I'll search for things like `sdio_device`, `sdio_driver`, or anything that mentions "mock SDIO" to see if there's any existing support or a basis for virtualizing this bus.

{
  "Expression": "sdio_register_driver"
}

{
  "Output": "drivers/bluetooth/btmrvl_sdio.c=1745=static int __init btmrvl_sdio_init_module(void)\ndrivers/bluetooth/btmrvl_sdio.c-1746-{\ndrivers/bluetooth/btmrvl_sdio.c:1747:\tif (sdio_register_driver(\u0026bt_mrvl_sdio) != 0) {\ndrivers/bluetooth/btmrvl_sdio.c-1748-\t\tBT_ERR(\"SDIO Driver Registration Failed\");\n--\ndrivers/mmc/core/sdio_bus.c=274=static void sdio_legacy_shutdown(struct sdio_func *func)\n--\ndrivers/mmc/core/sdio_bus.c-282-/**\ndrivers/mmc/core/sdio_bus.c:283: *\t__sdio_register_driver - register a function driver\ndrivers/mmc/core/sdio_bus.c-284- *\t@drv: SDIO function driver\n--\ndrivers/mmc/core/sdio_bus.c-286- */\ndrivers/mmc/core/sdio_bus.c:287:int __sdio_register_driver(struct sdio_driver *drv, struct module *owner)\ndrivers/mmc/core/sdio_bus.c-288-{\n--\ndrivers/mmc/core/sdio_bus.c-301-}\ndrivers/mmc/core/sdio_bus.c:302:EXPORT_SYMBOL_GPL(__sdio_register_driver);\ndrivers/mmc/core/sdio_bus.c-303-\n--\ndrivers/mmc/core/sdio_uart.c=1118=static int __init sdio_uart_init(void)\n--\ndrivers/mmc/core/sdio_uart.c-1143-\ndrivers/mmc/core/sdio_uart.c:1144:\tret = sdio_register_driver(\u0026sdio_uart_driver);\ndrivers/mmc/core/sdio_uart.c-1145-\tif (ret)\n--\ndrivers/net/wireless/broadcom/b43/sdio.c=195=int b43_sdio_init(void)\ndrivers/net/wireless/broadcom/b43/sdio.c-196-{\ndrivers/net/wireless/broadcom/b43/sdio.c:197:\treturn sdio_register_driver(\u0026b43_sdio_driver);\ndrivers/net/wireless/broadcom/b43/sdio.c-198-}\n--\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c=1271=int brcmf_sdio_register(void)\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1272-{\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c:1273:\treturn sdio_register_driver(\u0026brcmf_sdmmc_driver);\ndrivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c-1274-}\n--\ndrivers/net/wireless/marvell/libertas/if_sdio.c=1390=static int __init if_sdio_init_module(void)\n--\ndrivers/net/wireless/marvell/libertas/if_sdio.c-1396-\ndrivers/net/wireless/marvell/libertas/if_sdio.c:1397:\tret = sdio_register_driver(\u0026if_sdio_driver);\ndrivers/net/wireless/marvell/libertas/if_sdio.c-1398-\n--\ndrivers/net/wireless/silabs/wfx/main.c=506=static int __init wfx_core_init(void)\n--\ndrivers/net/wireless/silabs/wfx/main.c-515-\tif (IS_ENABLED(CONFIG_MMC)) {\ndrivers/net/wireless/silabs/wfx/main.c:516:\t\tret = sdio_register_driver(\u0026wfx_sdio_driver);\ndrivers/net/wireless/silabs/wfx/main.c-517-\t\tif (ret)\n--\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c=388=static int __init cw1200_sdio_init(void)\n--\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c-400-\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c:401:\tret = sdio_register_driver(\u0026sdio_driver);\ndrivers/net/wireless/st/cw1200/cw1200_sdio.c-402-\tif (ret)\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=453=static int __init rtw_drv_entry(void)\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-454-{\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:455:\treturn sdio_register_driver(\u0026rtl8723bs_sdio_driver);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-456-}\n--\ninclude/linux/mmc/sdio_func.h=75=struct sdio_driver {\n--\ninclude/linux/mmc/sdio_func.h-110-/* use a macro to avoid include chaining to get THIS_MODULE */\ninclude/linux/mmc/sdio_func.h:111:#define sdio_register_driver(drv) \\\ninclude/linux/mmc/sdio_func.h:112:\t__sdio_register_driver(drv, THIS_MODULE)\ninclude/linux/mmc/sdio_func.h:113:extern int __sdio_register_driver(struct sdio_driver *, struct module *);\ninclude/linux/mmc/sdio_func.h-114-extern void sdio_unregister_driver(struct sdio_driver *);\n--\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, \\\ninclude/linux/mmc/sdio_func.h-126-\t\t      sdio_unregister_driver)\n"
}

							input: 10050
							output: 18
							thoughts: 61

**MMC/SDIO Device Emulation - A Quick Investigation**

Alright, hold on a second! This is interesting... can we actually emulate MMC/SDIO devices within the standard QEMU environment or leverage syzkaller for this? My immediate thought is, are there any virtual MMC/SDIO host controllers lurking around, perhaps in the kernel source or even within syzkaller's test infrastructure? That's the logical starting point. I'll need to confirm if these exist.

I'll quickly run a search. "mmc_test" seems like a reasonable keyword to begin with, or perhaps anything similar that suggests testing or virtual functionality within the MMC or SDIO realm. This initial probe should quickly determine if there's even a foundation to build on.

{
  "Expression": "mmc_test"
}

{
  "Output": "\nFull output is too long, showing 500 out of 1894 lines.\nUse more precise expression if possible.\n\nDocumentation/driver-api/mmc/mmc-async-req.rst=35=in parallel with the transfer performance won't be affected.\nDocumentation/driver-api/mmc/mmc-async-req.rst-36-\nDocumentation/driver-api/mmc/mmc-async-req.rst:37:Details on measurements from IOZone and mmc_test\nDocumentation/driver-api/mmc/mmc-async-req.rst-38-================================================\n--\nDocumentation/driver-api/mmc/mmc-test.rst=7=Overview\n--\nDocumentation/driver-api/mmc/mmc-test.rst-9-\nDocumentation/driver-api/mmc/mmc-test.rst:10:The `mmc_test` framework is designed to test the performance and reliability of host controller drivers and all devices handled by the MMC subsystem. This ...\nDocumentation/driver-api/mmc/mmc-test.rst-11-\nDocumentation/driver-api/mmc/mmc-test.rst=12=The framework provides a variety of tests to evaluate different aspects of the host controller and device interactions, such as read and write performance,...\nDocumentation/driver-api/mmc/mmc-test.rst-13-\nDocumentation/driver-api/mmc/mmc-test.rst:14:The `mmc_test` framework is particularly useful for:\nDocumentation/driver-api/mmc/mmc-test.rst-15-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=24=Initialization\n--\nDocumentation/driver-api/mmc/mmc-test.rst-26-\nDocumentation/driver-api/mmc/mmc-test.rst:27:To use the ``mmc_test`` framework, follow these steps:\nDocumentation/driver-api/mmc/mmc-test.rst-28-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-52-\nDocumentation/driver-api/mmc/mmc-test.rst:53:   If the ``mmc_test`` framework is built as a module, you need to load it using ``modprobe``:\nDocumentation/driver-api/mmc/mmc-test.rst-54-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-56-\nDocumentation/driver-api/mmc/mmc-test.rst:57:      modprobe mmc_test\nDocumentation/driver-api/mmc/mmc-test.rst-58-\nDocumentation/driver-api/mmc/mmc-test.rst=59=Binding the MMC Card for Testing\n--\nDocumentation/driver-api/mmc/mmc-test.rst-61-\nDocumentation/driver-api/mmc/mmc-test.rst:62:To enable MMC testing, you need to unbind the MMC card from the ``mmcblk`` driver and bind it to the ``mmc_test`` driver. This allows the ``mmc_test`` fram...\nDocumentation/driver-api/mmc/mmc-test.rst-63-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-77-\nDocumentation/driver-api/mmc/mmc-test.rst:78:3. Bind the MMC card to the ``mmc_test`` driver:\nDocumentation/driver-api/mmc/mmc-test.rst-79-\n--\nDocumentation/driver-api/mmc/mmc-test.rst-81-\nDocumentation/driver-api/mmc/mmc-test.rst:82:      echo 'mmc0:0001' \u003e /sys/bus/mmc/drivers/mmc_test/bind\nDocumentation/driver-api/mmc/mmc-test.rst-83-\nDocumentation/driver-api/mmc/mmc-test.rst=84=After binding, you should see a line in the kernel log indicating that the card has been claimed for testing:\n--\nDocumentation/driver-api/mmc/mmc-test.rst-87-\nDocumentation/driver-api/mmc/mmc-test.rst:88:   mmc_test mmc0:0001: Card claimed for testing.\nDocumentation/driver-api/mmc/mmc-test.rst-89-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=91=Usage - Debugfs Entries\n--\nDocumentation/driver-api/mmc/mmc-test.rst-93-\nDocumentation/driver-api/mmc/mmc-test.rst:94:Once the ``mmc_test`` framework is enabled, you can interact with the following debugfs entries located in ``/sys/kernel/debug/mmc0/mmc0:0001``:\nDocumentation/driver-api/mmc/mmc-test.rst-95-\n--\nDocumentation/driver-api/mmc/mmc-test.rst=291=Contributing\n--\nDocumentation/driver-api/mmc/mmc-test.rst-293-\nDocumentation/driver-api/mmc/mmc-test.rst:294:Contributions to the `mmc_test` framework are welcome. Please follow the standard Linux kernel contribution guidelines and submit patches to the appropria...\nDocumentation/driver-api/mmc/mmc-test.rst-295-\n--\narch/arm64/boot/dts/qcom/sdm845-db845c.dts=1040=\t\tclk-pins {\n--\narch/arm64/boot/dts/qcom/sdm845-db845c.dts-1044-\t\t\t/*\narch/arm64/boot/dts/qcom/sdm845-db845c.dts:1045:\t\t\t * It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-db845c.dts-1046-\t\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi=581=\tsdc2_clk: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi-585-\t\t/*\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi:586:\t\t * It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-lg-common.dtsi-587-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-mtp.dts=801=\tsdc2_clk: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-mtp.dts-805-\t\t/*\narch/arm64/boot/dts/qcom/sdm845-mtp.dts:806:\t\t * It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-mtp.dts-807-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts=1025=\tsdc2_clk_state: sdc2-clk-state {\n--\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts-1029-\t\t/*\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts:1030:\t\t * It seems that mmc_test reports errors if drive\narch/arm64/boot/dts/qcom/sdm845-samsung-starqltechn.dts-1031-\t\t * strength is not 16 on clk, cmd, and data pins.\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi=613=\t\temmc_strb: emmc-strb {\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-619-\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:620:\temmc_testclk {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-621-\t\t/omit-if-no-ref/\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:622:\t\temmc_testclk_test: emmc_testclk-test {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-623-\t\t\trockchip,pins =\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:624:\t\t\t\t/* emmc_testclk_out */\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-625-\t\t\t\t\u003c1 RK_PB3 6 \u0026pcfg_pull_none\u003e;\n--\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-628-\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:629:\temmc_testdata {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-630-\t\t/omit-if-no-ref/\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:631:\t\temmc_testdata_test: emmc_testdata-test {\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-632-\t\t\trockchip,pins =\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi:633:\t\t\t\t/* emmc_testdata_out */\narch/arm64/boot/dts/rockchip/rk3576-pinctrl.dtsi-634-\t\t\t\t\u003c1 RK_PB7 5 \u0026pcfg_pull_none\u003e;\n--\ndrivers/gpu/drm/ast/ast_2300.c=117=static const u32 pattern[8] = {\n--\ndrivers/gpu/drm/ast/ast_2300.c-127-\ndrivers/gpu/drm/ast/ast_2300.c:128:static u32 mmc_test2(struct ast_device *ast, u32 datagen, u8 test_ctl)\ndrivers/gpu/drm/ast/ast_2300.c-129-{\n--\ndrivers/gpu/drm/ast/ast_2300.c-147-\ndrivers/gpu/drm/ast/ast_2300.c:148:static u32 mmc_test_burst2(struct ast_device *ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-149-{\ndrivers/gpu/drm/ast/ast_2300.c:150:\treturn mmc_test2(ast, datagen, 0x41);\ndrivers/gpu/drm/ast/ast_2300.c-151-}\ndrivers/gpu/drm/ast/ast_2300.c-152-\ndrivers/gpu/drm/ast/ast_2300.c:153:static bool mmc_test_single(struct ast_device *ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-154-{\ndrivers/gpu/drm/ast/ast_2300.c:155:\treturn mmc_test(ast, datagen, 0xc5);\ndrivers/gpu/drm/ast/ast_2300.c-156-}\ndrivers/gpu/drm/ast/ast_2300.c-157-\ndrivers/gpu/drm/ast/ast_2300.c:158:static u32 mmc_test_single2(struct ast_device *ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2300.c-159-{\ndrivers/gpu/drm/ast/ast_2300.c:160:\treturn mmc_test2(ast, datagen, 0x05);\ndrivers/gpu/drm/ast/ast_2300.c-161-}\n--\ndrivers/gpu/drm/ast/ast_2300.c=163=static int cbr_test(struct ast_device *ast)\n--\ndrivers/gpu/drm/ast/ast_2300.c-167-\ndrivers/gpu/drm/ast/ast_2300.c:168:\tdata = mmc_test_single2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-169-\tif ((data \u0026 0xff) \u0026\u0026 (data \u0026 0xff00))\n--\ndrivers/gpu/drm/ast/ast_2300.c-171-\tfor (i = 0; i \u003c 8; i++) {\ndrivers/gpu/drm/ast/ast_2300.c:172:\t\tdata = mmc_test_burst2(ast, i);\ndrivers/gpu/drm/ast/ast_2300.c-173-\t\tif ((data \u0026 0xff) \u0026\u0026 (data \u0026 0xff00))\n--\ndrivers/gpu/drm/ast/ast_2300.c=205=static u32 cbr_test2(struct ast_device *ast)\n--\ndrivers/gpu/drm/ast/ast_2300.c-208-\ndrivers/gpu/drm/ast/ast_2300.c:209:\tdata = mmc_test_burst2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-210-\tif (data == 0xffff)\ndrivers/gpu/drm/ast/ast_2300.c-211-\t\treturn 0;\ndrivers/gpu/drm/ast/ast_2300.c:212:\tdata |= mmc_test_single2(ast, 0);\ndrivers/gpu/drm/ast/ast_2300.c-213-\tif (data == 0xffff)\n--\ndrivers/gpu/drm/ast/ast_2300.c=241=static bool cbr_test3(struct ast_device *ast)\ndrivers/gpu/drm/ast/ast_2300.c-242-{\ndrivers/gpu/drm/ast/ast_2300.c:243:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2300.c-244-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2300.c:245:\tif (!mmc_test_single(ast, 0))\ndrivers/gpu/drm/ast/ast_2300.c-246-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_2500.c=107=void ast_2500_patch_ahb(void __iomem *regs)\n--\ndrivers/gpu/drm/ast/ast_2500.c-143-\ndrivers/gpu/drm/ast/ast_2500.c:144:static bool mmc_test_single_2500(struct ast_device *ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_2500.c-145-{\ndrivers/gpu/drm/ast/ast_2500.c:146:\treturn mmc_test(ast, datagen, 0x85);\ndrivers/gpu/drm/ast/ast_2500.c-147-}\n--\ndrivers/gpu/drm/ast/ast_2500.c=149=static bool cbr_test_2500(struct ast_device *ast)\n--\ndrivers/gpu/drm/ast/ast_2500.c-152-\tast_moutdwm(ast, AST_REG_MCR7C, 0xFF00FF00);\ndrivers/gpu/drm/ast/ast_2500.c:153:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-154-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:155:\tif (!mmc_test_single_2500(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-156-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_2500.c=160=static bool ddr_test_2500(struct ast_device *ast)\n--\ndrivers/gpu/drm/ast/ast_2500.c-163-\tast_moutdwm(ast, AST_REG_MCR7C, 0xFF00FF00);\ndrivers/gpu/drm/ast/ast_2500.c:164:\tif (!mmc_test_burst(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-165-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:166:\tif (!mmc_test_burst(ast, 1))\ndrivers/gpu/drm/ast/ast_2500.c-167-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:168:\tif (!mmc_test_burst(ast, 2))\ndrivers/gpu/drm/ast/ast_2500.c-169-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:170:\tif (!mmc_test_burst(ast, 3))\ndrivers/gpu/drm/ast/ast_2500.c-171-\t\treturn false;\ndrivers/gpu/drm/ast/ast_2500.c:172:\tif (!mmc_test_single_2500(ast, 0))\ndrivers/gpu/drm/ast/ast_2500.c-173-\t\treturn false;\n--\ndrivers/gpu/drm/ast/ast_post.c=37=int ast_post_gpu(struct ast_device *ast)\n--\ndrivers/gpu/drm/ast/ast_post.c-67-\ndrivers/gpu/drm/ast/ast_post.c:68:bool mmc_test(struct ast_device *ast, u32 datagen, u8 test_ctl)\ndrivers/gpu/drm/ast/ast_post.c-69-{\n--\ndrivers/gpu/drm/ast/ast_post.c-87-\ndrivers/gpu/drm/ast/ast_post.c:88:bool mmc_test_burst(struct ast_device *ast, u32 datagen)\ndrivers/gpu/drm/ast/ast_post.c-89-{\ndrivers/gpu/drm/ast/ast_post.c:90:\treturn mmc_test(ast, datagen, 0xc1);\ndrivers/gpu/drm/ast/ast_post.c-91-}\n--\ndrivers/gpu/drm/ast/ast_post.h=12=struct ast_dramstruct {\n--\ndrivers/gpu/drm/ast/ast_post.h-38-\ndrivers/gpu/drm/ast/ast_post.h:39:bool mmc_test(struct ast_device *ast, u32 datagen, u8 test_ctl);\ndrivers/gpu/drm/ast/ast_post.h:40:bool mmc_test_burst(struct ast_device *ast, u32 datagen);\ndrivers/gpu/drm/ast/ast_post.h-41-\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/mmc/core/mmc.c=1619=static int mmc_init_card(struct mmc_host *host, u32 ocr,\n--\ndrivers/mmc/core/mmc.c-1930-\t/*\ndrivers/mmc/core/mmc.c:1931:\t * In some cases (e.g. RPMB or mmc_test), the Command Queue must be\ndrivers/mmc/core/mmc.c-1932-\t * disabled for a time, so a flag is needed to indicate to re-enable the\n--\ndrivers/mmc/core/mmc_test.c-42-/**\ndrivers/mmc/core/mmc_test.c:43: * struct mmc_test_pages - pages allocated by 'alloc_pages()'.\ndrivers/mmc/core/mmc_test.c-44- * @page: first page in the allocation\n--\ndrivers/mmc/core/mmc_test.c-46- */\ndrivers/mmc/core/mmc_test.c:47:struct mmc_test_pages {\ndrivers/mmc/core/mmc_test.c-48-\tstruct page *page;\n--\ndrivers/mmc/core/mmc_test.c-52-/**\ndrivers/mmc/core/mmc_test.c:53: * struct mmc_test_mem - allocated memory.\ndrivers/mmc/core/mmc_test.c-54- * @cnt: number of allocations\n--\ndrivers/mmc/core/mmc_test.c-56- */\ndrivers/mmc/core/mmc_test.c:57:struct mmc_test_mem {\ndrivers/mmc/core/mmc_test.c-58-\tunsigned int cnt;\ndrivers/mmc/core/mmc_test.c:59:\tstruct mmc_test_pages arr[] __counted_by(cnt);\ndrivers/mmc/core/mmc_test.c-60-};\n--\ndrivers/mmc/core/mmc_test.c-62-/**\ndrivers/mmc/core/mmc_test.c:63: * struct mmc_test_area - information for performance tests.\ndrivers/mmc/core/mmc_test.c-64- * @max_sz: test area size (in bytes)\n--\ndrivers/mmc/core/mmc_test.c-74- */\ndrivers/mmc/core/mmc_test.c:75:struct mmc_test_area {\ndrivers/mmc/core/mmc_test.c-76-\tunsigned long max_sz;\n--\ndrivers/mmc/core/mmc_test.c-82-\tunsigned int sg_len;\ndrivers/mmc/core/mmc_test.c:83:\tstruct mmc_test_mem *mem;\ndrivers/mmc/core/mmc_test.c-84-\tstruct scatterlist *sg;\n--\ndrivers/mmc/core/mmc_test.c-88-/**\ndrivers/mmc/core/mmc_test.c:89: * struct mmc_test_transfer_result - transfer results for performance tests.\ndrivers/mmc/core/mmc_test.c-90- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-96- */\ndrivers/mmc/core/mmc_test.c:97:struct mmc_test_transfer_result {\ndrivers/mmc/core/mmc_test.c-98-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-106-/**\ndrivers/mmc/core/mmc_test.c:107: * struct mmc_test_general_result - results for tests.\ndrivers/mmc/core/mmc_test.c-108- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-111- * @result: result of test run\ndrivers/mmc/core/mmc_test.c:112: * @tr_lst: transfer measurements if any as mmc_test_transfer_result\ndrivers/mmc/core/mmc_test.c-113- */\ndrivers/mmc/core/mmc_test.c:114:struct mmc_test_general_result {\ndrivers/mmc/core/mmc_test.c-115-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-122-/**\ndrivers/mmc/core/mmc_test.c:123: * struct mmc_test_dbgfs_file - debugfs related file.\ndrivers/mmc/core/mmc_test.c-124- * @link: double-linked list\n--\ndrivers/mmc/core/mmc_test.c-127- */\ndrivers/mmc/core/mmc_test.c:128:struct mmc_test_dbgfs_file {\ndrivers/mmc/core/mmc_test.c-129-\tstruct list_head link;\n--\ndrivers/mmc/core/mmc_test.c-134-/**\ndrivers/mmc/core/mmc_test.c:135: * struct mmc_test_card - test information.\ndrivers/mmc/core/mmc_test.c-136- * @card: card under test\n--\ndrivers/mmc/core/mmc_test.c-142- */\ndrivers/mmc/core/mmc_test.c:143:struct mmc_test_card {\ndrivers/mmc/core/mmc_test.c-144-\tstruct mmc_card\t*card;\n--\ndrivers/mmc/core/mmc_test.c-149-#endif\ndrivers/mmc/core/mmc_test.c:150:\tstruct mmc_test_area\t\tarea;\ndrivers/mmc/core/mmc_test.c:151:\tstruct mmc_test_general_result\t*gr;\ndrivers/mmc/core/mmc_test.c-152-\n--\ndrivers/mmc/core/mmc_test.c-155-\ndrivers/mmc/core/mmc_test.c:156:enum mmc_test_prep_media {\ndrivers/mmc/core/mmc_test.c-157-\tMMC_TEST_PREP_NONE = 0,\n--\ndrivers/mmc/core/mmc_test.c-161-\ndrivers/mmc/core/mmc_test.c:162:struct mmc_test_multiple_rw {\ndrivers/mmc/core/mmc_test.c-163-\tunsigned int *sg_len;\n--\ndrivers/mmc/core/mmc_test.c-168-\tbool do_nonblock_req;\ndrivers/mmc/core/mmc_test.c:169:\tenum mmc_test_prep_media prepare;\ndrivers/mmc/core/mmc_test.c-170-};\n--\ndrivers/mmc/core/mmc_test.c=175=static unsigned int sg_len[] = {1, 1 \u003c\u003c 3, 1 \u003c\u003c 4, 1 \u003c\u003c 5, 1 \u003c\u003c 6,\n--\ndrivers/mmc/core/mmc_test.c-183- */\ndrivers/mmc/core/mmc_test.c:184:static int mmc_test_set_blksize(struct mmc_test_card *test, unsigned size)\ndrivers/mmc/core/mmc_test.c-185-{\n--\ndrivers/mmc/core/mmc_test.c-188-\ndrivers/mmc/core/mmc_test.c:189:static void mmc_test_prepare_sbc(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-190-\t\t\t\t struct mmc_request *mrq, unsigned int blocks)\n--\ndrivers/mmc/core/mmc_test.c-208- */\ndrivers/mmc/core/mmc_test.c:209:static void mmc_test_prepare_mrq(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-210-\tstruct mmc_request *mrq, struct scatterlist *sg, unsigned sg_len,\n--\ndrivers/mmc/core/mmc_test.c-243-\ndrivers/mmc/core/mmc_test.c:244:\tmmc_test_prepare_sbc(test, mrq, blocks);\ndrivers/mmc/core/mmc_test.c-245-\n--\ndrivers/mmc/core/mmc_test.c-248-\ndrivers/mmc/core/mmc_test.c:249:static int mmc_test_busy(struct mmc_command *cmd)\ndrivers/mmc/core/mmc_test.c-250-{\n--\ndrivers/mmc/core/mmc_test.c-257- */\ndrivers/mmc/core/mmc_test.c:258:static int mmc_test_wait_busy(struct mmc_test_card *test)\ndrivers/mmc/core/mmc_test.c-259-{\n--\ndrivers/mmc/core/mmc_test.c-274-\ndrivers/mmc/core/mmc_test.c:275:\t\tif (!busy \u0026\u0026 mmc_test_busy(\u0026cmd)) {\ndrivers/mmc/core/mmc_test.c-276-\t\t\tbusy = 1;\n--\ndrivers/mmc/core/mmc_test.c-280-\t\t}\ndrivers/mmc/core/mmc_test.c:281:\t} while (mmc_test_busy(\u0026cmd));\ndrivers/mmc/core/mmc_test.c-282-\n--\ndrivers/mmc/core/mmc_test.c-288- */\ndrivers/mmc/core/mmc_test.c:289:static int mmc_test_buffer_transfer(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-290-\tu8 *buffer, unsigned addr, unsigned blksz, int write)\n--\ndrivers/mmc/core/mmc_test.c-304-\ndrivers/mmc/core/mmc_test.c:305:\tmmc_test_prepare_mrq(test, \u0026mrq, \u0026sg, 1, addr, 1, blksz, write);\ndrivers/mmc/core/mmc_test.c-306-\n--\ndrivers/mmc/core/mmc_test.c-313-\ndrivers/mmc/core/mmc_test.c:314:\treturn mmc_test_wait_busy(test);\ndrivers/mmc/core/mmc_test.c-315-}\ndrivers/mmc/core/mmc_test.c-316-\ndrivers/mmc/core/mmc_test.c:317:static void mmc_test_free_mem(struct mmc_test_mem *mem)\ndrivers/mmc/core/mmc_test.c-318-{\n--\ndrivers/mmc/core/mmc_test.c-332- */\ndrivers/mmc/core/mmc_test.c:333:static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,\ndrivers/mmc/core/mmc_test.c-334-\t\t\t\t\t       unsigned long max_sz,\n--\ndrivers/mmc/core/mmc_test.c-342-\tunsigned long limit = nr_free_buffer_pages() \u003e\u003e 4;\ndrivers/mmc/core/mmc_test.c:343:\tstruct mmc_test_mem *mem;\ndrivers/mmc/core/mmc_test.c-344-\tunsigned int idx = 0;\n--\ndrivers/mmc/core/mmc_test.c-398-\tmem-\u003ecnt = idx;\ndrivers/mmc/core/mmc_test.c:399:\tmmc_test_free_mem(mem);\ndrivers/mmc/core/mmc_test.c-400-\treturn NULL;\n--\ndrivers/mmc/core/mmc_test.c-406- */\ndrivers/mmc/core/mmc_test.c:407:static int mmc_test_map_sg(struct mmc_test_mem *mem, unsigned long size,\ndrivers/mmc/core/mmc_test.c-408-\t\t\t   struct scatterlist *sglist, int repeat,\n--\ndrivers/mmc/core/mmc_test.c-457- */\ndrivers/mmc/core/mmc_test.c:458:static int mmc_test_map_sg_max_scatter(struct mmc_test_mem *mem,\ndrivers/mmc/core/mmc_test.c-459-\t\t\t\t       unsigned long sz,\n--\ndrivers/mmc/core/mmc_test.c-508- */\ndrivers/mmc/core/mmc_test.c:509:static unsigned int mmc_test_rate(uint64_t bytes, struct timespec64 *ts)\ndrivers/mmc/core/mmc_test.c-510-{\n--\ndrivers/mmc/core/mmc_test.c-531- */\ndrivers/mmc/core/mmc_test.c:532:static void mmc_test_save_transfer_result(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-533-\tunsigned int count, unsigned int sectors, struct timespec64 ts,\n--\ndrivers/mmc/core/mmc_test.c-535-{\ndrivers/mmc/core/mmc_test.c:536:\tstruct mmc_test_transfer_result *tr;\ndrivers/mmc/core/mmc_test.c-537-\n--\ndrivers/mmc/core/mmc_test.c-556- */\ndrivers/mmc/core/mmc_test.c:557:static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes,\ndrivers/mmc/core/mmc_test.c-558-\t\t\t\tstruct timespec64 *ts1, struct timespec64 *ts2)\n--\ndrivers/mmc/core/mmc_test.c-564-\ndrivers/mmc/core/mmc_test.c:565:\trate = mmc_test_rate(bytes, \u0026ts);\ndrivers/mmc/core/mmc_test.c:566:\tiops = mmc_test_rate(100, \u0026ts); /* I/O ops per sec x 100 */\ndrivers/mmc/core/mmc_test.c-567-\n--\ndrivers/mmc/core/mmc_test.c-574-\ndrivers/mmc/core/mmc_test.c:575:\tmmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops);\ndrivers/mmc/core/mmc_test.c-576-}\n--\ndrivers/mmc/core/mmc_test.c-580- */\ndrivers/mmc/core/mmc_test.c:581:static void mmc_test_print_avg_rate(struct mmc_test_card *test, uint64_t bytes,\ndrivers/mmc/core/mmc_test.c-582-\t\t\t\t    unsigned int count, struct timespec64 *ts1,\n--\ndrivers/mmc/core/mmc_test.c-590-\ndrivers/mmc/core/mmc_test.c:591:\trate = mmc_test_rate(tot, \u0026ts);\ndrivers/mmc/core/mmc_test.c:592:\tiops = mmc_test_rate(count * 100, \u0026ts); /* I/O ops per sec x 100 */\ndrivers/mmc/core/mmc_test.c-593-\n--\ndrivers/mmc/core/mmc_test.c-599-\ndrivers/mmc/core/mmc_test.c:600:\tmmc_test_save_transfer_result(test, count, sectors, ts, rate, iops);\ndrivers/mmc/core/mmc_test.c-601-}\n--\ndrivers/mmc/core/mmc_test.c-605- */\ndrivers/mmc/core/mmc_test.c:606:static unsigned int mmc_test_capacity(struct mmc_card *card)\ndrivers/mmc/core/mmc_test.c-607-{\n--\ndrivers/mmc/core/mmc_test.c-621- */\ndrivers/mmc/core/mmc_test.c:622:static int __mmc_test_prepare(struct mmc_test_card *test, int write, int val)\ndrivers/mmc/core/mmc_test.c-623-{\n--\ndrivers/mmc/core/mmc_test.c-625-\ndrivers/mmc/core/mmc_test.c:626:\tret = mmc_test_set_blksize(test, 512);\ndrivers/mmc/core/mmc_test.c-627-\tif (ret)\n--\ndrivers/mmc/core/mmc_test.c-637-\tfor (i = 0; i \u003c BUFFER_SIZE / 512; i++) {\ndrivers/mmc/core/mmc_test.c:638:\t\tret = mmc_test_buffer_transfer(test, test-\u003ebuffer, i, 512, 1);\ndrivers/mmc/core/mmc_test.c-639-\t\tif (ret)\n--\ndrivers/mmc/core/mmc_test.c-645-\ndrivers/mmc/core/mmc_test.c:646:static int mmc_test_prepare_write(struct mmc_test_card *test)\ndrivers/mmc/core/mmc_test.c-647-{\ndrivers/mmc/core/mmc_test.c:648:\treturn __mmc_test_prepare(test, 1, 0xDF);\ndrivers/mmc/core/mmc_test.c-649-}\ndrivers/mmc/core/mmc_test.c-650-\ndrivers/mmc/core/mmc_test.c:651:static int mmc_test_prepare_read(struct mmc_test_card *test)\ndrivers/mmc/core/mmc_test.c-652-{\ndrivers/mmc/core/mmc_test.c:653:\treturn __mmc_test_prepare(test, 0, 0);\ndrivers/mmc/core/mmc_test.c-654-}\ndrivers/mmc/core/mmc_test.c-655-\ndrivers/mmc/core/mmc_test.c:656:static int mmc_test_cleanup(struct mmc_test_card *test)\ndrivers/mmc/core/mmc_test.c-657-{\ndrivers/mmc/core/mmc_test.c:658:\treturn __mmc_test_prepare(test, 1, 0);\ndrivers/mmc/core/mmc_test.c-659-}\n--\ndrivers/mmc/core/mmc_test.c-667- */\ndrivers/mmc/core/mmc_test.c:668:static void mmc_test_prepare_broken_mrq(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-669-\tstruct mmc_request *mrq, int write)\n--\ndrivers/mmc/core/mmc_test.c-686- */\ndrivers/mmc/core/mmc_test.c:687:static int mmc_test_check_result(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-688-\t\t\t\t struct mmc_request *mrq)\n--\ndrivers/mmc/core/mmc_test.c-717- */\ndrivers/mmc/core/mmc_test.c:718:static int mmc_test_check_broken_result(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-719-\tstruct mmc_request *mrq)\n--\ndrivers/mmc/core/mmc_test.c-749-\ndrivers/mmc/core/mmc_test.c:750:struct mmc_test_req {\ndrivers/mmc/core/mmc_test.c-751-\tstruct mmc_request mrq;\n--\ndrivers/mmc/core/mmc_test.c-761- */\ndrivers/mmc/core/mmc_test.c:762:static void mmc_test_req_reset(struct mmc_test_req *rq)\ndrivers/mmc/core/mmc_test.c-763-{\ndrivers/mmc/core/mmc_test.c:764:\tmemset(rq, 0, sizeof(struct mmc_test_req));\ndrivers/mmc/core/mmc_test.c-765-\n--\ndrivers/mmc/core/mmc_test.c-770-\ndrivers/mmc/core/mmc_test.c:771:static struct mmc_test_req *mmc_test_req_alloc(void)\ndrivers/mmc/core/mmc_test.c-772-{\ndrivers/mmc/core/mmc_test.c:773:\tstruct mmc_test_req *rq = kmalloc_obj(*rq);\ndrivers/mmc/core/mmc_test.c-774-\ndrivers/mmc/core/mmc_test.c-775-\tif (rq)\ndrivers/mmc/core/mmc_test.c:776:\t\tmmc_test_req_reset(rq);\ndrivers/mmc/core/mmc_test.c-777-\n--\ndrivers/mmc/core/mmc_test.c-780-\ndrivers/mmc/core/mmc_test.c:781:static void mmc_test_wait_done(struct mmc_request *mrq)\ndrivers/mmc/core/mmc_test.c-782-{\n--\ndrivers/mmc/core/mmc_test.c-785-\ndrivers/mmc/core/mmc_test.c:786:static int mmc_test_start_areq(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-787-\t\t\t       struct mmc_request *mrq,\n--\ndrivers/mmc/core/mmc_test.c-794-\t\tinit_completion(\u0026mrq-\u003ecompletion);\ndrivers/mmc/core/mmc_test.c:795:\t\tmrq-\u003edone = mmc_test_wait_done;\ndrivers/mmc/core/mmc_test.c-796-\t\tmmc_pre_req(host, mrq);\n--\ndrivers/mmc/core/mmc_test.c-800-\t\twait_for_completion(\u0026prev_mrq-\u003ecompletion);\ndrivers/mmc/core/mmc_test.c:801:\t\terr = mmc_test_wait_busy(test);\ndrivers/mmc/core/mmc_test.c-802-\t\tif (!err)\ndrivers/mmc/core/mmc_test.c:803:\t\t\terr = mmc_test_check_result(test, prev_mrq);\ndrivers/mmc/core/mmc_test.c-804-\t}\n--\ndrivers/mmc/core/mmc_test.c-820-\ndrivers/mmc/core/mmc_test.c:821:static int mmc_test_nonblock_transfer(struct mmc_test_card *test,\ndrivers/mmc/core/mmc_test.c-822-\t\t\t\t      unsigned int dev_addr, int write,\n--\ndrivers/mmc/core/mmc_test.c-824-{\ndrivers/mmc/core/mmc_test.c:825:\tstruct mmc_test_req *rq1, *rq2;\ndrivers/mmc/core/mmc_test.c-826-\tstruct mmc_request *mrq, *prev_mrq;\n--\ndrivers/mmc/core/mmc_test.c-828-\tint ret = RESULT_OK;\ndrivers/mmc/core/mmc_test.c:829:\tstruct mmc_test_area *t = \u0026test-\u003earea;\ndrivers/mmc/core/mmc_test.c-830-\tstruct scatterlist *sg = t-\u003esg;\n--\ndrivers/mmc/core/mmc_test.c-832-\ndrivers/mmc/core/mmc_test.c:833:\trq1 = mmc_test_req_alloc();\ndrivers/mmc/core/mmc_test.c:834:\trq2 = mmc_test_req_alloc();\ndrivers/mmc/core/mmc_test.c-835-\tif (!rq1 || !rq2) {\n--\ndrivers/mmc/core/mmc_test.c-843-\tfor (i = 0; i \u003c count; i++) {\ndrivers/mmc/core/mmc_test.c:844:\t\tmmc_test_req_reset(container_of(mrq, struct mmc_test_req, mrq));\ndrivers/mmc/core/mmc_test.c:845:\t\tmmc_test_prepare_mrq(test, mrq, sg, t-\u003esg_len, dev_addr,\ndrivers/mmc/core/mmc_test.c-846-\t\t\t\t     t-\u003eblocks, 512, write);\ndrivers/mmc/core/mmc_test.c:847:\t\tret = mmc_test_start_areq(test, mrq, prev_mrq);\ndrivers/mmc/core/mmc_test.c-848-\t\tif (ret)\n\n"
}

							input: 22271
							output: 40
							thoughts: 320

**My Line of Inquiry: mac80211_hwsim and RTL8723BS**

Okay, hold on a minute! I was focusing on the architecture, but I need to consider `mac80211_hwsim`. Does the RTL8723BS driver even *use* mac80211? Time to dig in... Let's check the `drivers/staging/rtl8723bs/Kconfig` file. Right, I see the dependencies: `WLAN && MMC && CFG80211`. Ah, right, it *doesn't* use mac80211 directly, but it *does* use cfg80211. And this is a standalone driver specifically for the Realtek RTL8723BS SDIO Wireless LAN NIC.

Now, that brings up another critical question: how does an SDIO device probe and initialize in the Linux kernel? I remember... SDIO devices are typically probed when an MMC host detects an SDIO card.

So, thinking about QEMU, what MMC hosts are available? I know QEMU has `sdhci-pci`. Great!

But here's the kicker: what SDIO card can *actually* be plugged into the `sdhci-pci` device in QEMU? QEMU emulates SD memory cards (`sd-card`), which is a block storage device. But does QEMU emulate a *Realtek RTL8723BS* SDIO WiFi card? No! QEMU only has `sd-card`, which is a generic MMC/SD card for block storage, not an SDIO WiFi card, especially not an RTL8723BS with its specific vendor ID (0x024c) and device IDs (0x0523, 0xb723, etc.). That's a deal-breaker!

Okay, so maybe I can create the SDIO device via the sysfs `new_device` interface. I'll need to check the relevant code, let's look at `drivers/mmc/core/sdio_bus.c`.

{
  "File": "drivers/mmc/core/sdio_bus.c",
  "FirstLine": 1,
  "LineCount": 100
}

{
  "Contents": "   1:\t// SPDX-License-Identifier: GPL-2.0-or-later\n   2:\t/*\n   3:\t *  linux/drivers/mmc/core/sdio_bus.c\n   4:\t *\n   5:\t *  Copyright 2007 Pierre Ossman\n   6:\t *\n   7:\t * SDIO function driver model\n   8:\t */\n   9:\t\n  10:\t#include \u003clinux/device.h\u003e\n  11:\t#include \u003clinux/err.h\u003e\n  12:\t#include \u003clinux/export.h\u003e\n  13:\t#include \u003clinux/slab.h\u003e\n  14:\t#include \u003clinux/pm_runtime.h\u003e\n  15:\t#include \u003clinux/pm_domain.h\u003e\n  16:\t#include \u003clinux/acpi.h\u003e\n  17:\t#include \u003clinux/sysfs.h\u003e\n  18:\t\n  19:\t#include \u003clinux/mmc/card.h\u003e\n  20:\t#include \u003clinux/mmc/host.h\u003e\n  21:\t#include \u003clinux/mmc/sdio_func.h\u003e\n  22:\t#include \u003clinux/of.h\u003e\n  23:\t\n  24:\t#include \"core.h\"\n  25:\t#include \"card.h\"\n  26:\t#include \"sdio_cis.h\"\n  27:\t#include \"sdio_bus.h\"\n  28:\t\n  29:\t#define to_sdio_driver(d)\tcontainer_of_const(d, struct sdio_driver, drv)\n  30:\t\n  31:\t/* show configuration fields */\n  32:\t#define sdio_config_attr(field, format_string, args...)\t\t\t\\\n  33:\tstatic ssize_t\t\t\t\t\t\t\t\t\\\n  34:\tfield##_show(struct device *dev, struct device_attribute *attr, char *buf)\t\t\t\t\\\n  35:\t{\t\t\t\t\t\t\t\t\t\\\n  36:\t\tstruct sdio_func *func;\t\t\t\t\t\t\\\n  37:\t\t\t\t\t\t\t\t\t\t\\\n  38:\t\tfunc = dev_to_sdio_func (dev);\t\t\t\t\t\\\n  39:\t\treturn sysfs_emit(buf, format_string, args);\t\t\t\\\n  40:\t}\t\t\t\t\t\t\t\t\t\\\n  41:\tstatic DEVICE_ATTR_RO(field)\n  42:\t\n  43:\tsdio_config_attr(class, \"0x%02x\\n\", func-\u003eclass);\n  44:\tsdio_config_attr(vendor, \"0x%04x\\n\", func-\u003evendor);\n  45:\tsdio_config_attr(device, \"0x%04x\\n\", func-\u003edevice);\n  46:\tsdio_config_attr(revision, \"%u.%u\\n\", func-\u003emajor_rev, func-\u003eminor_rev);\n  47:\tsdio_config_attr(modalias, \"sdio:c%02Xv%04Xd%04X\\n\", func-\u003eclass, func-\u003evendor, func-\u003edevice);\n  48:\t\n  49:\t#define sdio_info_attr(num)\t\t\t\t\t\t\t\t\t\\\n  50:\tstatic ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf)\t\\\n  51:\t{\t\t\t\t\t\t\t\t\t\t\t\t\\\n  52:\t\tstruct sdio_func *func = dev_to_sdio_func(dev);\t\t\t\t\t\t\\\n  53:\t\t\t\t\t\t\t\t\t\t\t\t\t\\\n  54:\t\tif (num \u003e func-\u003enum_info)\t\t\t\t\t\t\t\t\\\n  55:\t\t\treturn -ENODATA;\t\t\t\t\t\t\t\t\\\n  56:\t\tif (!func-\u003einfo[num - 1][0])\t\t\t\t\t\t\t\t\\\n  57:\t\t\treturn 0;\t\t\t\t\t\t\t\t\t\\\n  58:\t\treturn sysfs_emit(buf, \"%s\\n\", func-\u003einfo[num - 1]);\t\t\t\t\t\\\n  59:\t}\t\t\t\t\t\t\t\t\t\t\t\t\\\n  60:\tstatic DEVICE_ATTR_RO(info##num)\n  61:\t\n  62:\tsdio_info_attr(1);\n  63:\tsdio_info_attr(2);\n  64:\tsdio_info_attr(3);\n  65:\tsdio_info_attr(4);\n  66:\t\n  67:\tstatic struct attribute *sdio_dev_attrs[] = {\n  68:\t\t\u0026dev_attr_class.attr,\n  69:\t\t\u0026dev_attr_vendor.attr,\n  70:\t\t\u0026dev_attr_device.attr,\n  71:\t\t\u0026dev_attr_revision.attr,\n  72:\t\t\u0026dev_attr_info1.attr,\n  73:\t\t\u0026dev_attr_info2.attr,\n  74:\t\t\u0026dev_attr_info3.attr,\n  75:\t\t\u0026dev_attr_info4.attr,\n  76:\t\t\u0026dev_attr_modalias.attr,\n  77:\t\tNULL,\n  78:\t};\n  79:\tATTRIBUTE_GROUPS(sdio_dev);\n  80:\t\n  81:\tstatic const struct sdio_device_id *sdio_match_one(struct sdio_func *func,\n  82:\t\tconst struct sdio_device_id *id)\n  83:\t{\n  84:\t\tif (id-\u003eclass != (__u8)SDIO_ANY_ID \u0026\u0026 id-\u003eclass != func-\u003eclass)\n  85:\t\t\treturn NULL;\n  86:\t\tif (id-\u003evendor != (__u16)SDIO_ANY_ID \u0026\u0026 id-\u003evendor != func-\u003evendor)\n  87:\t\t\treturn NULL;\n  88:\t\tif (id-\u003edevice != (__u16)SDIO_ANY_ID \u0026\u0026 id-\u003edevice != func-\u003edevice)\n  89:\t\t\treturn NULL;\n  90:\t\treturn id;\n  91:\t}\n  92:\t\n  93:\tstatic const struct sdio_device_id *sdio_match_device(struct sdio_func *func,\n  94:\t\tconst struct sdio_driver *sdrv)\n  95:\t{\n  96:\t\tconst struct sdio_device_id *ids;\n  97:\t\n  98:\t\tids = sdrv-\u003eid_table;\n  99:\t\n 100:\t\tif (ids) {\n"
}

							input: 24671
							output: 41
							thoughts: 37

Okay, let's see. My first instinct here is to get a handle on how this SDIO bus type is structured. I need to quickly ascertain if `sdio_bus_type` contains a function or structure element that deals with new device enumeration. Specifically, something akin to `.new_device` is what I'm looking for, perhaps a similar naming scheme.

To be sure, I’ll cross-reference the definition in `sdio_bus.c`. That file is likely to hold the core bus driver implementation, so it makes sense to confirm my expectations there.

{
  "File": "drivers/mmc/core/sdio_bus.c",
  "FirstLine": 300,
  "LineCount": 80
}

{
  "Contents": " 300:\t\treturn driver_register(\u0026drv-\u003edrv);\n 301:\t}\n 302:\tEXPORT_SYMBOL_GPL(__sdio_register_driver);\n 303:\t\n 304:\t/**\n 305:\t *\tsdio_unregister_driver - unregister a function driver\n 306:\t *\t@drv: SDIO function driver\n 307:\t */\n 308:\tvoid sdio_unregister_driver(struct sdio_driver *drv)\n 309:\t{\n 310:\t\tdrv-\u003edrv.bus = \u0026sdio_bus_type;\n 311:\t\tdriver_unregister(\u0026drv-\u003edrv);\n 312:\t}\n 313:\tEXPORT_SYMBOL_GPL(sdio_unregister_driver);\n 314:\t\n 315:\tstatic void sdio_release_func(struct device *dev)\n 316:\t{\n 317:\t\tstruct sdio_func *func = dev_to_sdio_func(dev);\n 318:\t\n 319:\t\tif (!(func-\u003ecard-\u003equirks \u0026 MMC_QUIRK_NONSTD_SDIO))\n 320:\t\t\tsdio_free_func_cis(func);\n 321:\t\n 322:\t\t/*\n 323:\t\t * We have now removed the link to the tuples in the\n 324:\t\t * card structure, so remove the reference.\n 325:\t\t */\n 326:\t\tput_device(\u0026func-\u003ecard-\u003edev);\n 327:\t\n 328:\t\tkfree(func-\u003einfo);\n 329:\t\tkfree(func-\u003etmpbuf);\n 330:\t\tkfree(func);\n 331:\t}\n 332:\t\n 333:\t/*\n 334:\t * Allocate and initialise a new SDIO function structure.\n 335:\t */\n 336:\tstruct sdio_func *sdio_alloc_func(struct mmc_card *card)\n 337:\t{\n 338:\t\tstruct sdio_func *func;\n 339:\t\n 340:\t\tfunc = kzalloc_obj(struct sdio_func);\n 341:\t\tif (!func)\n 342:\t\t\treturn ERR_PTR(-ENOMEM);\n 343:\t\n 344:\t\t/*\n 345:\t\t * allocate buffer separately to make sure it's properly aligned for\n 346:\t\t * DMA usage (incl. 64 bit DMA)\n 347:\t\t */\n 348:\t\tfunc-\u003etmpbuf = kmalloc(4, GFP_KERNEL);\n 349:\t\tif (!func-\u003etmpbuf) {\n 350:\t\t\tkfree(func);\n 351:\t\t\treturn ERR_PTR(-ENOMEM);\n 352:\t\t}\n 353:\t\n 354:\t\tfunc-\u003ecard = card;\n 355:\t\n 356:\t\tdevice_initialize(\u0026func-\u003edev);\n 357:\t\n 358:\t\t/*\n 359:\t\t * We may link to tuples in the card structure,\n 360:\t\t * we need make sure we have a reference to it.\n 361:\t\t */\n 362:\t\tget_device(\u0026func-\u003ecard-\u003edev);\n 363:\t\n 364:\t\tfunc-\u003edev.parent = \u0026card-\u003edev;\n 365:\t\tfunc-\u003edev.bus = \u0026sdio_bus_type;\n 366:\t\tfunc-\u003edev.release = sdio_release_func;\n 367:\t\n 368:\t\treturn func;\n 369:\t}\n 370:\t\n 371:\t#ifdef CONFIG_ACPI\n 372:\tstatic void sdio_acpi_set_handle(struct sdio_func *func)\n 373:\t{\n 374:\t\tstruct mmc_host *host = func-\u003ecard-\u003ehost;\n 375:\t\tu64 addr = ((u64)host-\u003eslotno \u003c\u003c 16) | func-\u003enum;\n 376:\t\n 377:\t\tacpi_preset_companion(\u0026func-\u003edev, ACPI_COMPANION(host-\u003eparent), addr);\n 378:\t}\n 379:\t#else\n"
}

							input: 25983
							output: 31
							thoughts: 12

Okay, here's my take on those thoughts, tailored for an expert audience, and delivered as a first-person summary:

**Initial Diagnostic: Examining the `sdio_bus_type`**

Alright, let's dive right in. My initial thought process is always methodical, so my first instinct is to zero in on the `sdio_bus_type`. This is the fundamental building block, the core abstraction we need to understand the behavior of the system. I need to refresh my memory and verify its current state within the context of whatever issue I'm debugging. Is it behaving as expected? Are there any obvious flags set that are causing conflicts? I'm going to start by confirming the bus type to see if that's a red herring. It's a quick sanity check, but it's often the place to start when diagnosing these kinds of issues. Let's see what's what.

{
  "Expression": "sdio_bus_type =",
  "PathPrefix": "drivers/mmc"
}

{
  "Output": "drivers/mmc/core/sdio_bus.c=244=static const struct dev_pm_ops sdio_bus_pm_ops = {\n--\ndrivers/mmc/core/sdio_bus.c-252-\ndrivers/mmc/core/sdio_bus.c:253:static const struct bus_type sdio_bus_type = {\ndrivers/mmc/core/sdio_bus.c-254-\t.name\t\t= \"sdio\",\n"
}

							input: 26349
							output: 41
							thoughts: 21

Here's a summary of my thought process:

**Diving into the SDIO Bus Structure**

Okay, time to get my hands dirty and really understand how this SDIO bus thing is working. Let's start with the fundamental building block: the `sdio_bus_type` structure. I need to refresh my memory on the interactions within that code. It's been a while since I've reviewed `sdio_bus.c`. I know a deep understanding of this underlying bus type is crucial for everything else down the line, so this is where I'll begin my deep dive. I'll probably be making notes and cross-referencing other related areas. Let's see what gems are waiting to be uncovered.

{
  "File": "drivers/mmc/core/sdio_bus.c",
  "FirstLine": 245,
  "LineCount": 40
}

{
  "Contents": " 245:\t\tSET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume)\n 246:\t\tSET_RUNTIME_PM_OPS(\n 247:\t\t\tpm_generic_runtime_suspend,\n 248:\t\t\tpm_generic_runtime_resume,\n 249:\t\t\tNULL\n 250:\t\t)\n 251:\t};\n 252:\t\n 253:\tstatic const struct bus_type sdio_bus_type = {\n 254:\t\t.name\t\t= \"sdio\",\n 255:\t\t.dev_groups\t= sdio_dev_groups,\n 256:\t\t.match\t\t= sdio_bus_match,\n 257:\t\t.uevent\t\t= sdio_bus_uevent,\n 258:\t\t.probe\t\t= sdio_bus_probe,\n 259:\t\t.remove\t\t= sdio_bus_remove,\n 260:\t\t.shutdown\t= sdio_bus_shutdown,\n 261:\t\t.pm\t\t= \u0026sdio_bus_pm_ops,\n 262:\t};\n 263:\t\n 264:\tint sdio_register_bus(void)\n 265:\t{\n 266:\t\treturn bus_register(\u0026sdio_bus_type);\n 267:\t}\n 268:\t\n 269:\tvoid sdio_unregister_bus(void)\n 270:\t{\n 271:\t\tbus_unregister(\u0026sdio_bus_type);\n 272:\t}\n 273:\t\n 274:\tstatic void sdio_legacy_shutdown(struct sdio_func *func)\n 275:\t{\n 276:\t\tstruct device *dev = \u0026func-\u003edev;\n 277:\t\tstruct device_driver *driver = dev-\u003edriver;\n 278:\t\n 279:\t\tdriver-\u003eshutdown(dev);\n 280:\t}\n 281:\t\n 282:\t/**\n 283:\t *\t__sdio_register_driver - register a function driver\n 284:\t *\t@drv: SDIO function driver\n"
}

							input: 27135
							output: 28
							thoughts: 73

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

**SDIO Device Instantiation Concerns & RTL8723BS Portability**

Right, so I'm digging into this `sdio_bus_type` situation. My immediate concern is that I'm not seeing any typical userspace mechanisms to directly instantiate an SDIO device on that bus. Hmm, that's not ideal. It's making me wonder if I'm missing something fundamental or if there's a design constraint I'm overlooking here.

Wait a second… before I dive too deep into custom implementations, I need to take a step back and consider the bigger picture. Is this specific `rtl8723bs` module *only* used with SDIO? Is it tied to other busses such as USB or PCI? It's crucial I don't overlook any potential reusability or dependencies across different system architectures.

Okay, time to do a thorough check. I'm going to start by examining the entirety of the `drivers/staging/rtl8723bs` directory. I'll scour through the code, looking for any signs of cross-bus compatibility, potential drivers for USB or PCI (or anything else), and any related configuration files that might reveal its intended usage. Only with this full context can I decide if my initial assumption is correct, or if there's an easy win to be had. I need to understand its relationship to the kernel ecosystem before I can properly approach the task at hand.

{
  "Dir": "drivers/staging/rtl8723bs"
}

{
  "Files": null,
  "Subdirs": [
    "core",
    "hal",
    "include",
    "os_dep"
  ]
}

							input: 27589
							output: 32
							thoughts: 21

Here's my take on the thought process, summarized as you requested:

**Diving into the RTL8723BS Driver Source**

Okay, time to get my hands dirty. Let's start by digging into the `drivers/staging/rtl8723bs/os_dep` directory. That's the logical place to begin when I'm assessing this particular driver. I know that's where the OS-dependent code is going to live, the parts that interface with the kernel and handle things like memory management, interrupt handling, and other system-level interactions specific to the platform. By inspecting the files in that directory, I can quickly get a sense of how this driver is structured, how it's interacting with the underlying OS, and potentially identify any areas that might require attention or modification depending on the system in question. It's the first step in understanding the driver's integration and behavior.

{
  "Dir": "drivers/staging/rtl8723bs/os_dep"
}

{
  "Files": [
    "ioctl_cfg80211.c",
    "os_intfs.c",
    "osdep_service.c",
    "sdio_intf.c",
    "sdio_ops_linux.c",
    "wifi_regd.c",
    "xmit_linux.c"
  ],
  "Subdirs": null
}

							input: 27918
							output: 38
							thoughts: 29

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

**Focused Investigation: SDIO Interface in RTL8723BS Driver**

Alright, the problem seems to be isolated to `sdio_intf.c`, which makes sense given the nature of the issue. Before I dive deep into that specific file, though, I always like to get the lay of the land first. So, the logical next step is to examine the associated build configuration. I'm going to quickly check the `drivers/staging/rtl8723bs/Makefile`. That should give me a high-level overview of how `sdio_intf.c` fits into the overall driver build, what dependencies it might have, and potentially any conditional compilation flags or module dependencies I should be aware of. Knowing the build context is crucial before I start debugging, and the Makefile is the perfect starting point to quickly understand how this module is built and linked. I'm expecting this will save me time in the long run.

{
  "File": "drivers/staging/rtl8723bs/Makefile",
  "FirstLine": 1,
  "LineCount": 65
}

{
  "Contents": "   1:\t# SPDX-License-Identifier: GPL-2.0\n   2:\tr8723bs-y = \\\n   3:\t\t\tcore/rtw_ap.o \\\n   4:\t\t\tcore/rtw_btcoex.o \\\n   5:\t\t \tcore/rtw_cmd.o \\\n   6:\t\t\tcore/rtw_efuse.o \\\n   7:\t\t\tcore/rtw_io.o \\\n   8:\t\t\tcore/rtw_ioctl_set.o \\\n   9:\t\t\tcore/rtw_ieee80211.o \\\n  10:\t\t\tcore/rtw_mlme.o \\\n  11:\t\t\tcore/rtw_mlme_ext.o \\\n  12:\t\t\tcore/rtw_pwrctrl.o \\\n  13:\t\t\tcore/rtw_recv.o \\\n  14:\t\t\tcore/rtw_security.o \\\n  15:\t\t\tcore/rtw_sta_mgt.o \\\n  16:\t\t\tcore/rtw_wlan_util.o \\\n  17:\t\t\tcore/rtw_xmit.o\t\\\n  18:\t\t\thal/hal_intf.o \\\n  19:\t\t\thal/hal_com.o \\\n  20:\t\t\thal/hal_com_phycfg.o \\\n  21:\t\t\thal/hal_btcoex.o \\\n  22:\t\t\thal/hal_sdio.o \\\n  23:\t\t\thal/hal_pwr_seq.o \\\n  24:\t\t\thal/HalPhyRf.o \\\n  25:\t\t\thal/HalPwrSeqCmd.o \\\n  26:\t\t\thal/odm.o \\\n  27:\t\t\thal/odm_CfoTracking.o \\\n  28:\t\t\thal/odm_DIG.o \\\n  29:\t\t\thal/odm_DynamicBBPowerSaving.o \\\n  30:\t\t\thal/odm_DynamicTxPower.o \\\n  31:\t\t\thal/odm_EdcaTurboCheck.o \\\n  32:\t\t\thal/odm_HWConfig.o \\\n  33:\t\t\thal/odm_RegConfig8723B.o \\\n  34:\t\t\thal/rtl8723b_cmd.o \\\n  35:\t\t\thal/rtl8723b_dm.o \\\n  36:\t\t\thal/rtl8723b_hal_init.o \\\n  37:\t\t\thal/rtl8723b_phycfg.o \\\n  38:\t\t\thal/rtl8723b_rf6052.o \\\n  39:\t\t\thal/rtl8723b_rxdesc.o \\\n  40:\t\t\thal/rtl8723bs_recv.o \\\n  41:\t\t\thal/rtl8723bs_xmit.o \\\n  42:\t\t\thal/sdio_halinit.o \\\n  43:\t\t\thal/sdio_ops.o \\\n  44:\t\t\thal/HalBtc8723b1Ant.o \\\n  45:\t\t\thal/HalBtc8723b2Ant.o \\\n  46:\t\t\thal/HalHWImg8723B_BB.o \\\n  47:\t\t\thal/HalHWImg8723B_MAC.o \\\n  48:\t\t\thal/HalHWImg8723B_RF.o \\\n  49:\t\t\thal/HalPhyRf_8723B.o \\\n  50:\t\t\tos_dep/ioctl_cfg80211.o \\\n  51:\t\t\tos_dep/osdep_service.o \\\n  52:\t\t\tos_dep/os_intfs.o \\\n  53:\t\t\tos_dep/sdio_intf.o \\\n  54:\t\t\tos_dep/sdio_ops_linux.o \\\n  55:\t\t\tos_dep/wifi_regd.o \\\n  56:\t\t\tos_dep/xmit_linux.o\n  57:\t\n  58:\tobj-$(CONFIG_RTL8723BS) := r8723bs.o\n  59:\t\n  60:\tccflags-y += -I$(src)/include -I$(src)/hal\n"
}

							input: 29257
							output: 22
							thoughts: 111

**Analyzing the Realtek 8723BS Driver Module**

Okay, let's dive in. I'm looking at `r8723bs.ko`. Hmm, it's only compiled if `CONFIG_RTL8723BS` is defined. Makes sense. It's an SDIO driver – specifically, `rtl8723bs_sdio_driver`. Now, a question arises in my mind: Are any of the functions defined within `rtw_ap.c` in the staging area exposed and accessible to the broader kernel? I need to check something like `rtw_check_beacon_data` or any other function in the `drivers/staging/rtl8723bs` directory. I'll need to confirm if these functions are exported.

{
  "Expression": "rtw_check_beacon_data"
}

{
  "Output": "drivers/staging/rtl8723bs/core/rtw_ap.c=609=void start_bss_network(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/core/rtw_ap.c-749-\ndrivers/staging/rtl8723bs/core/rtw_ap.c:750:int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)\ndrivers/staging/rtl8723bs/core/rtw_ap.c-751-{\n--\ndrivers/staging/rtl8723bs/include/rtw_ap.h=17=void start_bss_network(struct adapter *padapter);\ndrivers/staging/rtl8723bs/include/rtw_ap.h:18:int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len);\ndrivers/staging/rtl8723bs/include/rtw_ap.h-19-void rtw_ap_restore_network(struct adapter *padapter);\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2242=static int rtw_add_beacon(struct adapter *adapter, const u8 *head, size_t head_len, const u8 *tail, size_t tail_len)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2270-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2271:\tif (rtw_check_beacon_data(adapter, pbuf,  len) == _SUCCESS)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2272-\t\tret = 0;\n"
}

							input: 30045
							output: 36
							thoughts: 100

Here's my thought process, as if I were analyzing this code:

**Deep Dive into Beacon Data Handling**

Okay, so `rtw_check_beacon_data`... I'm immediately noticing it's only called from `rtw_add_beacon`, and that call happens within `drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c`. That's a good starting point for understanding its execution path. Now, the key is remembering how `rtw_add_beacon` fits into the bigger picture. Right, it's part of the `cfg80211_ops` structure, and that structure is registered when the device probes. This means `rtw_add_beacon` is likely tied to the device's initialization and the configuration setup of 802.11 operations, which is important. To fully grasp the context, I'm going to quickly confirm where exactly `rtw_add_beacon` is being called and referenced. This will give a clearer picture of what triggers its execution and where any potential issues might arise in the beacon data handling.

{
  "Expression": "rtw_add_beacon",
  "PathPrefix": "drivers/staging/rtl8723bs"
}

{
  "Output": "drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2214=static int cfg80211_rtw_del_virtual_intf(struct wiphy *wiphy,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2241-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2242:static int rtw_add_beacon(struct adapter *adapter, const u8 *head, size_t head_len, const u8 *tail, size_t tail_len)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2243-{\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2281=static int cfg80211_rtw_start_ap(struct wiphy *wiphy, struct net_device *ndev,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2286-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2287:\tret = rtw_add_beacon(adapter, settings-\u003ebeacon.head,\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2288-\t\t\t     settings-\u003ebeacon.head_len, settings-\u003ebeacon.tail,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2306=static int cfg80211_rtw_change_beacon(struct wiphy *wiphy, struct net_device *ndev,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2310-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2311:\treturn rtw_add_beacon(adapter, info-\u003ebeacon.head,\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2312-\t\t\t      info-\u003ebeacon.head_len, info-\u003ebeacon.tail,\n"
}

							input: 31027
							output: 41
							thoughts: 92

Here's my thought process, as if I were analyzing this code:

**Analyzing Beacon Configuration in the rtw Driver**

Okay, so I'm looking at how beacons are handled in this `rtw` driver. The core of it seems to hinge on `rtw_add_beacon`, which is definitely a key function. I see that it gets called from two places – `cfg80211_rtw_start_ap` and `cfg80211_rtw_change_beacon`. That gives me a handle on the two contexts where beacon updates are triggered. Now, I need to understand the relationship between those functions and the driver's overall structure.

`cfg80211_rtw_start_ap` and `cfg80211_rtw_change_beacon` are clearly part of `rtw_cfg80211_ops`. Since they are defined in `rtw_cfg80211_ops`, this struct almost certainly contains the callback functions that interface the driver with the cfg80211 netlink interface. This means these methods, which in turn call `rtw_add_beacon`, are the entry points for beacon management via cfg80211.

The next critical step is to trace the registration. I should look for where either `rtw_cfg80211_ops` or, more likely, the associated `wiphy` structure (which uses `rtw_cfg80211_ops`) is registered with the kernel. That will tell me how the driver is bound to the cfg80211 subsystem and how the upper layers talk to the driver. This registration is a crucial point; it is what provides a well defined interface for beacon management.

{
  "Expression": "rtw_cfg80211_ops",
  "PathPrefix": "drivers/staging/rtl8723bs"
}

{
  "Output": "drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2620=static void rtw_cfg80211_preinit_wiphy(struct adapter *padapter, struct wiphy *wiphy)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2662-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2663:static struct cfg80211_ops rtw_cfg80211_ops = {\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2664-\t.change_virtual_intf = cfg80211_rtw_change_iface,\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2698=int rtw_wdev_alloc(struct adapter *padapter, struct device *dev)\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2706-\t/* wiphy */\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2707:\twiphy = wiphy_new(\u0026rtw_cfg80211_ops, sizeof(struct adapter *));\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2708-\tif (!wiphy) {\n"
}

							input: 31951
							output: 37
							thoughts: 33

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the Probe Sequence**

Alright, so `rtw_wdev_alloc` – that rings a bell. And, if I'm remembering correctly, that's typically involved during the device probe sequence. This is important because it's where the initial setup of the wireless device happens, and any issues here can cascade into larger problems later. So, let's nail down precisely where `rtw_wdev_alloc` is being invoked. I need to trace its call sites to understand the context and what's leading up to its execution. Knowing the call path will provide valuable insight into what might be causing any anomalies I'm seeing. This is the first step in debugging the probe process.

{
  "Expression": "rtw_wdev_alloc",
  "PathPrefix": "drivers/staging/rtl8723bs"
}

{
  "Output": "drivers/staging/rtl8723bs/core/rtw_mlme.c=42=int rtw_init_mlme_priv(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/core/rtw_mlme.c-52-\tpmlmepriv-\u003epscanned = NULL;\ndrivers/staging/rtl8723bs/core/rtw_mlme.c:53:\tpmlmepriv-\u003efw_state = WIFI_STATION_STATE; /*  Must sync with rtw_wdev_alloc() */\ndrivers/staging/rtl8723bs/core/rtw_mlme.c-54-\tpmlmepriv-\u003ecur_network.network.infrastructure_mode = NL80211_IFTYPE_UNSPECIFIED;\n--\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h=10=struct rtw_wdev_priv {\n--\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h-28-\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h:29:int rtw_wdev_alloc(struct adapter *padapter, struct device *dev);\ndrivers/staging/rtl8723bs/include/ioctl_cfg80211.h-30-void rtw_wdev_free(struct wireless_dev *wdev);\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=2663=static struct cfg80211_ops rtw_cfg80211_ops = {\n--\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2697-\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2698:int rtw_wdev_alloc(struct adapter *padapter, struct device *dev)\ndrivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2699-{\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=218=static struct adapter *rtw_sdio_if1_init(struct dvobj_priv *dvobj)\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-276-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:277:\trtw_wdev_alloc(padapter, dvobj_to_dev(dvobj));\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-278-\n"
}

							input: 32896
							output: 50
							thoughts: 80

Here's my understanding of the situation, given my expertise:

**Dissecting the RTL8723BS SDIO Initialization**

Okay, so I'm tracing the initialization of the SDIO interface for the RTL8723BS driver. Specifically, `rtw_sdio_if1_init` is the function of interest. The call stack appears to be: `rtw_drv_init` calls `rtw_sdio_if1_init`.  And, `rtw_drv_init` itself is called during the `.probe` stage of the `rtl8723bs_sdio_driver`. Now, let's head over to `drivers/staging/rtl8723bs/os_dep/sdio_intf.c` where I'm going to find the implementation of `rtw_drv_init` to get the lay of the land and understand exactly how this SDIO interface is being set up within the overall driver initialization sequence. This will reveal the critical initialization steps. From there I'll be able to work backward and verify all the supporting code.

{
  "File": "drivers/staging/rtl8723bs/os_dep/sdio_intf.c",
  "FirstLine": 310,
  "LineCount": 80
}

{
  "Contents": " 310:\t\tstruct net_device *pnetdev = if1-\u003epnetdev;\n 311:\t\tstruct mlme_priv *pmlmepriv = \u0026if1-\u003emlmepriv;\n 312:\t\n 313:\t\tif (check_fwstate(pmlmepriv, _FW_LINKED))\n 314:\t\t\trtw_disassoc_cmd(if1, 0, false);\n 315:\t\n 316:\t\tfree_mlme_ap_info(if1);\n 317:\t\n 318:\t\trtw_cancel_all_timer(if1);\n 319:\t\n 320:\t\trtw_dev_unload(if1);\n 321:\t\n 322:\t\tif (if1-\u003ertw_wdev)\n 323:\t\t\trtw_wdev_free(if1-\u003ertw_wdev);\n 324:\t\n 325:\t\trtw_free_drv_sw(if1);\n 326:\t\n 327:\t\tif (pnetdev)\n 328:\t\t\trtw_free_netdev(pnetdev);\n 329:\t}\n 330:\t\n 331:\t/*\n 332:\t * drv_init() - a device potentially for us\n 333:\t *\n 334:\t * notes: drv_init() is called when the bus driver has located a card for us to support.\n 335:\t *        We accept the new device by returning 0.\n 336:\t */\n 337:\tstatic int rtw_drv_init(struct sdio_func *func,\n 338:\t\t\t\tconst struct sdio_device_id *id)\n 339:\t{\n 340:\t\tint status = _FAIL;\n 341:\t\tstruct adapter *if1 = NULL;\n 342:\t\tstruct dvobj_priv *dvobj;\n 343:\t\n 344:\t\tdvobj = sdio_dvobj_init(func);\n 345:\t\tif (!dvobj)\n 346:\t\t\tgoto exit;\n 347:\t\n 348:\t\tif1 = rtw_sdio_if1_init(dvobj);\n 349:\t\tif (!if1)\n 350:\t\t\tgoto free_dvobj;\n 351:\t\n 352:\t\t/* dev_alloc_name \u0026\u0026 register_netdev */\n 353:\t\tstatus = rtw_drv_register_netdev(if1);\n 354:\t\tif (status != _SUCCESS)\n 355:\t\t\tgoto free_if1;\n 356:\t\n 357:\t\tstatus = sdio_alloc_irq(dvobj);\n 358:\t\tif (status != _SUCCESS)\n 359:\t\t\tgoto free_netdev;\n 360:\t\n 361:\t\tstatus = _SUCCESS;\n 362:\t\n 363:\tfree_netdev:\n 364:\t\tif (status != _SUCCESS)\n 365:\t\t\trtw_unregister_netdevs(dvobj);\n 366:\tfree_if1:\n 367:\t\tif (status != _SUCCESS \u0026\u0026 if1)\n 368:\t\t\trtw_sdio_if1_deinit(if1);\n 369:\t\n 370:\tfree_dvobj:\n 371:\t\tif (status != _SUCCESS)\n 372:\t\t\tsdio_dvobj_deinit(func);\n 373:\texit:\n 374:\t\treturn status == _SUCCESS ? 0 : -ENODEV;\n 375:\t}\n 376:\t\n 377:\tstatic void rtw_dev_remove(struct sdio_func *func)\n 378:\t{\n 379:\t\tstruct dvobj_priv *dvobj = sdio_get_drvdata(func);\n 380:\t\tstruct adapter *padapter = dvobj-\u003eif1;\n 381:\t\n 382:\t\tdvobj-\u003eprocessing_dev_remove = true;\n 383:\t\n 384:\t\trtw_unregister_netdevs(dvobj);\n 385:\t\n 386:\t\tif (!padapter-\u003ebSurpriseRemoved) {\n 387:\t\t\tint err;\n 388:\t\n 389:\t\t\t/* test surprise remove */\n"
}

							input: 34410
							output: 20
							thoughts: 798

**RTL8723BS Fuzzing Feasibility Analysis**

Okay, let's break this down. My immediate concern is whether `rtl8723bs` is even reachable in a fuzzing setup. The core triage philosophy is clear: reachability is paramount. If the code can't execute in a standard virtualized environment like GCE or QEMU, we're wasting our time. We're looking for software-emulated devices, things like USB gadgets, netdev, or tun/tap.

My understanding of the negative criteria is pretty straightforward, specifically, we need to ask if the modified code falls into any "structurally unreachable hardware" categories. Does `rtl8723bs` fall into this category?

First, I need to know: can SDIO drivers be reached in syzkaller? Syzkaller's device support is key. Let's see... Ah, it supports virtual devices like USB, Bluetooth, and WiFi. But what about *this* WiFi driver? Syzkaller's WiFi support uses `mac80211_hwsim`. Does that help? No, `mac80211_hwsim` is a completely separate software driver. It creates virtual wiphy/netdev devices, but does it use `rtl8723bs`? No. And `rtl8723bs` doesn't even use `mac80211`. It registers directly with `cfg80211`. That's not the problem.

The problem is it only attaches to SDIO hardware and specific Realtek IDs: 0x024c, 0x0523, etc. This is the crucial point!

Can QEMU or GCE emulate this Realtek RTL8723BS SDIO card? I don't believe so. QEMU does *not* emulate RTL8723BS SDIO cards. Therefore, it seems, it is hardware dependent.

The next question: Does Linux have *any* software emulation for SDIO devices, similar to how we have raw-gadget for USB or vhci for BT? I need to investigate that angle next.

{
  "Expression": "sdio_.*emulat"
}

{
  "error": "no matches"
}

							input: 35707
							output: 30
							thoughts: 601

**Analyzing the RTL8723BS SDIO Driver Changes**

Okay, first things first, let's see if syzkaller has any direct references to "sdio." But wait, I recall the instructions mentioning that this tool isn't supposed to be used on syzlang descriptions or expressions including "long syz_." Those are pseudo-syscalls and aren't in the Linux kernel. The instructions directed me to use `read-syz-spec` and `syz-grepper` instead. Hmm, are those even available? Let me quickly check the declarations – nope, they're not. We only have `grepper`, `codesearch-dir-index`, `read-file`, and `set-results`. So, no `syz-grepper` for me today.

Alright, let's switch gears and examine the patch itself. The diff focuses on `drivers/staging/rtl8723bs/core/rtw_ap.c`. The changes seem to be in the `rtw_check_beacon_data` function, specifically related to the beacon data length checks and how vendor-specific information elements (IEs) are handled. It looks like a length check is being tightened, and `rtw_get_ie` is being replaced by `rtw_get_ie_ex` with length adjustments.

Now, a key question: is anything *else* built from `drivers/staging/rtl8723bs` besides `r8723bs.ko`? Checking the `Makefile`, it's clear that only `r8723bs.o` is created there. And, based on my knowledge and that of the kernel, `r8723bs` is indeed the driver for the Realtek RTL8723BS SDIO Wireless LAN NIC.

I need to quickly confirm that it is defined in the Kconfig.

{
  "Expression": "RTL8723BS",
  "PathPrefix": "drivers/staging"
}

{
  "Output": "drivers/staging/Makefile=4=obj-y\t\t\t\t+= media/\ndrivers/staging/Makefile:5:obj-$(CONFIG_RTL8723BS)\t\t+= rtl8723bs/\ndrivers/staging/Makefile-6-obj-$(CONFIG_OCTEON_ETHERNET)\t+= octeon/\n--\ndrivers/staging/rtl8723bs/Kconfig-1-# SPDX-License-Identifier: GPL-2.0\ndrivers/staging/rtl8723bs/Kconfig:2:config RTL8723BS\ndrivers/staging/rtl8723bs/Kconfig:3:\ttristate \"Realtek RTL8723BS SDIO Wireless LAN NIC driver\"\ndrivers/staging/rtl8723bs/Kconfig-4-\tdepends on WLAN \u0026\u0026 MMC \u0026\u0026 CFG80211\n--\ndrivers/staging/rtl8723bs/Kconfig-9-\thelp\ndrivers/staging/rtl8723bs/Kconfig:10:\tThis option enables support for RTL8723BS SDIO drivers, such as\ndrivers/staging/rtl8723bs/Kconfig-11-\tthe wifi found on the 1st gen Intel Compute Stick, the CHIP\n--\ndrivers/staging/rtl8723bs/Makefile=2=r8723bs-y = \\\n--\ndrivers/staging/rtl8723bs/Makefile-57-\ndrivers/staging/rtl8723bs/Makefile:58:obj-$(CONFIG_RTL8723BS) := r8723bs.o\ndrivers/staging/rtl8723bs/Makefile-59-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=561=u32 rtl8723bs_hal_init(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-806-/*  */\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:807:static void CardDisableRTL8723BSdio(struct adapter *padapter)\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-808-{\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=853=u32 rtl8723bs_hal_deinit(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-892-\t\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:893:\t\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-894-\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-898-\t\t} else {\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:899:\t\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-900-\t\t}\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c=1053=static s32 _ReadAdapterInfo8723BS(struct adapter *padapter)\n--\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1075-\t\t */\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c:1076:\t\tCardDisableRTL8723BSdio(padapter);\ndrivers/staging/rtl8723bs/hal/sdio_halinit.c-1077-\t}\n--\ndrivers/staging/rtl8723bs/include/hal_pg.h-42-\ndrivers/staging/rtl8723bs/include/hal_pg.h:43:/* RTL8723BS */\ndrivers/staging/rtl8723bs/include/hal_pg.h-44-#define\tEEPROM_MAC_ADDR_8723BS\t\t\t0x11A\n--\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c=463=module_exit(rtw_drv_halt);\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c-464-\ndrivers/staging/rtl8723bs/os_dep/sdio_intf.c:465:MODULE_DESCRIPTION(\"Realtek RTL8723BS SDIO WiFi driver\");\n"
}

							input: 37910
							output: 20
							thoughts: 34

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

**Investigating Dependencies and Potential Conflicts**

Okay, so I need to figure out what else in this system interacts with `rtw_ap.h` or, more broadly, the `rtl8723bs` module. I need to be absolutely sure there aren't any hidden dependencies or conflicts lurking that could cause problems. I'll need to go beyond the immediate area I'm focusing on. It's time to start searching the codebase to determine the scope of this file's usage, and the use of the module. Knowing all the points of contact is critical to avoiding unintended consequences. Gotta be thorough.

{
  "Expression": "rtw_ap.h"
}

{
  "Output": "drivers/staging/rtl8723bs/include/drv_types.h-48-#include \u003crtw_mlme_ext.h\u003e\ndrivers/staging/rtl8723bs/include/drv_types.h:49:#include \u003crtw_ap.h\u003e\ndrivers/staging/rtl8723bs/include/drv_types.h-50-#include \u003crtw_version.h\u003e\n"
}

							input: 38221
							output: 150
							thoughts: 855

**WorthFuzzing Decision for rtw_check_beacon_data**

Okay, let's break this down systematically. I see that `rtw_ap.h` is only included within `drv_types.h` which is internal to the `rtl8723bs` module. I need to figure out if this is fuzzable. First, the `r8723bs` driver is, in fact, specifically for the Realtek RTL8723BS SDIO Wireless LAN NIC. SDIO devices *require* physical hardware connected to an MMC/SDIO host controller. Now, I know that neither standard QEMU nor Google Compute Engine (GCE) virtual machines emulate this specific RTL8723BS SDIO device—they don't emulate SDIO WiFi cards at all. And, critically, there's no software emulation mechanism in Linux or syzkaller for SDIO peripheral devices, unlike the USB situation with `dummy_hcd` and `raw-gadget`.

Thinking about the fuzzing guidelines, the core triage philosophy says reachability is the primary gate. If the code is unreachable in standard virtualized environments, we shouldn't fuzz it. Specifically, it mentions structurally unreachable hardware like vendor-specific PCIe switches or drivers requiring physical cards. The RTL8723BS clearly falls into this category: it's a driver for *specific* physical hardware. Since neither QEMU nor GCE emulates the RTL8723BS SDIO hardware, and there's no SDIO emulation in Linux, the driver can *never* probe. Therefore, the code, including `rtw_check_beacon_data`, is structurally unreachable. This means `WorthFuzzing` has to be `false`.

Given `WorthFuzzing=false`, the guidelines suggest `FocusSymbols` and `EnableConfigs` should be empty arrays (or `null`). I've checked the schema and this aligns with what's expected. To solidify this, I'm confirming that the patch *does* modify `rtw_check_beacon_data` in `drivers/staging/rtl8723bs/core/rtw_ap.c`. That file's part of the `r8723bs` module, `CONFIG_RTL8723BS`, which, again, is for the RTL8723BS SDIO card. With no SDIO emulation, the code's unreachable in fuzzing environments. Okay, that's rock solid. I'm ready to call `set-results`.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The changes are entirely contained within the Realtek RTL8723BS SDIO wireless network driver (drivers/staging/rtl8723bs/core/rtw_ap.c). This driver requires physical Realtek RTL8723BS SDIO hardware connected to an MMC/SDIO host controller. Because standard virtualized environments (QEMU / GCE) do not emulate RTL8723BS SDIO cards and the kernel lacks a software gadget/emulation framework for SDIO peripherals, the driver cannot probe and the modified code is structurally unreachable.",
  "WorthFuzzing": false
}

{
  "WorthFuzzing": false
}

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)