AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/06/28 00:50	flow	patch-triage	0m Args: null Results: { "EnableConfigs": [ "MAC80211_HWSIM" ], "FocusSymbols": [ "mac80211_hwsim_get_tx_rate", "mac80211_hwsim_monitor_rx", "mac80211_hwsim_write_tsf" ], "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.", "WorthFuzzing": true }
1/1	2026/06/28 00:50	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit d2d7cc786c48868d54baa4a1e3524a18e06e8b67\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sun Jun 28 00:50:28 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c\nindex 0dd8a6c8595344..4a66272526f340 100644\n--- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c\n+++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c\n@@ -1324,6 +1324,17 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw hw,\n \t}\n }\n \n+static struct ieee80211_rate \n+mac80211_hwsim_get_tx_rate(struct ieee80211_hw hw,\n+\t\t\t struct ieee80211_tx_info info)\n+{\n+\tif (info-\u003econtrol.rates[0].flags \u0026\n+\t (IEEE80211_TX_RC_MCS \| IEEE80211_TX_RC_VHT_MCS))\n+\t\treturn NULL;\n+\n+\treturn ieee80211_get_tx_rate(hw, info);\n+}\n+\n static void mac80211_hwsim_monitor_rx(struct ieee80211_hw hw,\n \t\t\t\t struct sk_buff tx_skb,\n \t\t\t\t struct ieee80211_channel chan)\n@@ -1333,7 +1344,7 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw hw,\n \tstruct hwsim_radiotap_hdr hdr;\n \tu16 flags, bitrate;\n \tstruct ieee80211_tx_info info = IEEE80211_SKB_CB(tx_skb);\n-\tstruct ieee80211_rate txrate = ieee80211_get_tx_rate(hw, info);\n+\tstruct ieee80211_rate txrate = mac80211_hwsim_get_tx_rate(hw, info);\n \n \tif (!txrate)\n \t\tbitrate = 0;\n@@ -1603,7 +1614,7 @@ static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data *data,\n \n \tspin_lock_bh(\u0026data-\u003etsf_offset_lock);\n \n-\ttxrate = ieee80211_get_tx_rate(data-\u003ehw, info);\n+\ttxrate = mac80211_hwsim_get_tx_rate(data-\u003ehw, info);\n \tif (txrate)\n \t\tbitrate = txrate-\u003ebitrate;\n \n" }
2/1	2026/06/28 00:50	agent	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: { "EnableConfigs": [ "MAC80211_HWSIM" ], "FocusSymbols": [ "mac80211_hwsim_get_tx_rate", "mac80211_hwsim_monitor_rx", "mac80211_hwsim_write_tsf" ], "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.", "WorthFuzzing": true } Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Do not list too generic configs (we already have them enabled). Only list those that specifically cover the modified code. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes: commit d2d7cc786c48868d54baa4a1e3524a18e06e8b67 Author: syz-cluster <triage@syzkaller.com> Date: Sun Jun 28 00:50:28 2026 +0000 syz-cluster: applied patch under review diff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c index 0dd8a6c8595344..4a66272526f340 100644 --- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c +++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c @@ -1324,6 +1324,17 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw hw, } } +static struct ieee80211_rate +mac80211_hwsim_get_tx_rate(struct ieee80211_hw hw, + struct ieee80211_tx_info info) +{ + if (info->control.rates[0].flags & + (IEEE80211_TX_RC_MCS \| IEEE80211_TX_RC_VHT_MCS)) + return NULL; + + return ieee80211_get_tx_rate(hw, info); +} + static void mac80211_hwsim_monitor_rx(struct ieee80211_hw hw, struct sk_buff tx_skb, struct ieee80211_channel chan) @@ -1333,7 +1344,7 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw hw, struct hwsim_radiotap_hdr hdr; u16 flags, bitrate; struct ieee80211_tx_info info = IEEE80211_SKB_CB(tx_skb); - struct ieee80211_rate txrate = ieee80211_get_tx_rate(hw, info); + struct ieee80211_rate txrate = mac80211_hwsim_get_tx_rate(hw, info); if (!txrate) bitrate = 0; @@ -1603,7 +1614,7 @@ static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data *data, spin_lock_bh(&data->tsf_offset_lock); - txrate = ieee80211_get_tx_rate(data->hw, info); + txrate = mac80211_hwsim_get_tx_rate(data->hw, info); if (txrate) bitrate = txrate->bitrate;
3/2	2026/06/28 00:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 2372 output: 38 thoughts: 199 Thoughts: Analyzing the mac80211_hwsim Patch Okay, so I'm looking at this patch in `drivers/net/wireless/virtual/mac80211_hwsim_main.c`. It seems they've added a function called `mac80211_hwsim_get_tx_rate`. From a quick glance, it's just a wrapper around `ieee80211_get_tx_rate`. The interesting part is the conditional: it's checking `info->control.rates[0].flags` for `IEEE80211_TX_RC_MCS` or `IEEE80211_TX_RC_VHT_MCS` and returning `NULL` if either is set. That suggests it's explicitly avoiding handling MCS or VHT MCS rates in some contexts. The code uses this function in `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`, so those functions might not support MCS/VHT. Right, let me just double-check the configuration options for this file. It looks like the relevant configuration is `MAC80211_HWSIM`. I'll need to remember that.
4/2	2026/06/28 00:50	tool	grepper	0m Args: { "Expression": "MAC80211_HWSIM", "PathPrefix": "drivers/net/wireless/virtual/" } Results: { "Output": "drivers/net/wireless/virtual/Kconfig:1:config MAC80211_HWSIM\ndrivers/net/wireless/virtual/Kconfig-2-\ttristate \"Simulated radio testing tool for mac80211\"\n--\ndrivers/net/wireless/virtual/Makefile:1:obj-$(CONFIG_MAC80211_HWSIM)\t+= mac80211_hwsim.o\ndrivers/net/wireless/virtual/Makefile-2-mac80211_hwsim-objs\t\t+= mac80211_hwsim_main.o\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-8-\ndrivers/net/wireless/virtual/mac80211_hwsim.h:9:#ifndef __MAC80211_HWSIM_H\ndrivers/net/wireless/virtual/mac80211_hwsim.h:10:#define __MAC80211_HWSIM_H\ndrivers/net/wireless/virtual/mac80211_hwsim.h-11-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=217=struct hwsim_tx_rate {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-230- \ndrivers/net/wireless/virtual/mac80211_hwsim.h:231: @MAC80211_HWSIM_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:232: * @MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.\ndrivers/net/wireless/virtual/mac80211_hwsim.h-233- \tThis is set if the current BSS requires ERP protection.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:234: @MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:235: * @MAC80211_HWSIM_TX_RC_MCS: HT rate.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:236: * @MAC80211_HWSIM_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is\ndrivers/net/wireless/virtual/mac80211_hwsim.h-237- \tsplit into a higher 4 bits (Nss) and lower 4 bits (MCS number)\ndrivers/net/wireless/virtual/mac80211_hwsim.h:238: @MAC80211_HWSIM_TX_RC_GREEN_FIELD: Indicates whether this rate should be used\ndrivers/net/wireless/virtual/mac80211_hwsim.h-239- \tin Greenfield mode.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:240: @MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be\ndrivers/net/wireless/virtual/mac80211_hwsim.h-241- \t40 MHz.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:242: @MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission\ndrivers/net/wireless/virtual/mac80211_hwsim.h:243: * @MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission\ndrivers/net/wireless/virtual/mac80211_hwsim.h-244- \t(80+80 isn't supported yet)\ndrivers/net/wireless/virtual/mac80211_hwsim.h:245: @MAC80211_HWSIM_TX_RC_DUP_DATA: The frame should be transmitted on both of\ndrivers/net/wireless/virtual/mac80211_hwsim.h-246- \tthe adjacent 20 MHz channels, if the current channel type is\ndrivers/net/wireless/virtual/mac80211_hwsim.h-247- \tNL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:248: * @MAC80211_HWSIM_TX_RC_SHORT_GI: Short Guard interval should be used for this\ndrivers/net/wireless/virtual/mac80211_hwsim.h-249- \trate.\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=251=enum hwsim_tx_rate_flags {\ndrivers/net/wireless/virtual/mac80211_hwsim.h:252:\tMAC80211_HWSIM_TX_RC_USE_RTS_CTS\t\t= BIT(0),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:253:\tMAC80211_HWSIM_TX_RC_USE_CTS_PROTECT\t\t= BIT(1),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:254:\tMAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE\t= BIT(2),\ndrivers/net/wireless/virtual/mac80211_hwsim.h-255-\ndrivers/net/wireless/virtual/mac80211_hwsim.h-256-\t/ rate index is an HT/VHT MCS instead of an index /\ndrivers/net/wireless/virtual/mac80211_hwsim.h:257:\tMAC80211_HWSIM_TX_RC_MCS\t\t\t= BIT(3),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:258:\tMAC80211_HWSIM_TX_RC_GREEN_FIELD\t\t= BIT(4),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:259:\tMAC80211_HWSIM_TX_RC_40_MHZ_WIDTH\t\t= BIT(5),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:260:\tMAC80211_HWSIM_TX_RC_DUP_DATA\t\t= BIT(6),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:261:\tMAC80211_HWSIM_TX_RC_SHORT_GI\t\t= BIT(7),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:262:\tMAC80211_HWSIM_TX_RC_VHT_MCS\t\t\t= BIT(8),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:263:\tMAC80211_HWSIM_TX_RC_80_MHZ_WIDTH\t\t= BIT(9),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:264:\tMAC80211_HWSIM_TX_RC_160_MHZ_WIDTH\t\t= BIT(10),\ndrivers/net/wireless/virtual/mac80211_hwsim.h-265-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=328=enum hwsim_rate_info_attributes {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-347-\ndrivers/net/wireless/virtual/mac80211_hwsim.h:348:#endif / __MAC80211_HWSIM_H /\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-9-\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:10:#ifndef __MAC80211_HWSIM_I_H\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:11:#define __MAC80211_HWSIM_I_H\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-12-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h=165=void ieee80211_hwsim_wake_tx_queue(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-167-\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:168:#endif /* __MAC80211_HWSIM_I_H /\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=712=static struct mac80211_hwsim_data get_hwsim_data_ref_from_addr(const u8 addr)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-716-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:717:/ MAC80211_HWSIM netlink family /\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-718-static struct genl_family hwsim_genl_family;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=724=static const struct genl_multicast_group hwsim_mcgrps[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-727-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:728:/ MAC80211_HWSIM netlink policy /\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-729-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=865=static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-901-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:902:/ MAC80211_HWSIM virtio queues /\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-903-static struct virtqueue hwsim_vqs[HWSIM_NUM_VQS];\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1575=static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate rate)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1579-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_RTS_CTS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1580:\t\tresult \|= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1581-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_CTS_PROTECT)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1582:\t\tresult \|= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1583-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_SHORT_PREAMBLE)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1584:\t\tresult \|= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1585-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_MCS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1586:\t\tresult \|= MAC80211_HWSIM_TX_RC_MCS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1587-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_GREEN_FIELD)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1588:\t\tresult \|= MAC80211_HWSIM_TX_RC_GREEN_FIELD;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1589-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_40_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1590:\t\tresult \|= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1591-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_DUP_DATA)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1592:\t\tresult \|= MAC80211_HWSIM_TX_RC_DUP_DATA;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1593-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_SHORT_GI)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1594:\t\tresult \|= MAC80211_HWSIM_TX_RC_SHORT_GI;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1595-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_VHT_MCS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1596:\t\tresult \|= MAC80211_HWSIM_TX_RC_VHT_MCS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1597-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_80_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1598:\t\tresult \|= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1599-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_160_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1600:\t\tresult \|= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1601-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3473=static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3483-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3484:#define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3485-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3495=static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3498-\tif (sset == ETH_SS_STATS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3499:\t\treturn MAC80211_HWSIM_SSTATS_LEN;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3500-\treturn 0;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3503=static void mac80211_hwsim_get_et_stats(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3518-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3519:\tWARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3520-}\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=5623=static const u8 iftypes_ext_capa_ap[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5631-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:5632:#define MAC80211_HWSIM_MLD_CAPA_OPS\t\t\t\t\\\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5633-\tFIELD_PREP_CONST(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP, \\\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=5638=static const struct wiphy_iftype_ext_capab mac80211_hwsim_iftypes_ext_capa[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5645-\t\t\t\t IEEE80211_EML_CAP_EMLMR_SUPPORT,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:5646:\t\t.mld_capa_and_ops = MAC80211_HWSIM_MLD_CAPA_OPS,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5647-\t},\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=7094=static struct genl_family hwsim_genl_family __ro_after_init = {\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7095:\t.name = \"MAC80211_HWSIM\",\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7096-\t.version = 1,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=7413=static void hwsim_virtio_remove(struct virtio_device vdev)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7421-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7422:/* MAC80211_HWSIM virtio device id table /\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7423-static const struct virtio_device_id id_table[] = {\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7424:\t{ VIRTIO_ID_MAC80211_HWSIM, VIRTIO_DEV_ANY_ID },\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7425-\t{ 0 }\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=78=static u64 hwsim_nan_get_master_rank(struct mac80211_hwsim_data data)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-82-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:83:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_UP) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-84-\t\tmaster_pref = data-\u003enan.master_pref;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=216=void mac80211_hwsim_nan_rx(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-273-\tif ((slot != SLOT_24GHZ_DW \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:274:\t data-\u003enan.phase != MAC80211_HWSIM_NAN_PHASE_SCAN) \|\|\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-275-\t rx_status.freq != 2437)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-436-\t\t (cg == own_cg \u0026\u0026 frame_amr \u003e curr_amr) \|\|\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:437:\t\t data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-438-\t\t\t/ Avoid a state transition /\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-468-\t\t\t /\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:469:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_UP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-470-\t\t\tdata-\u003enan.random_factor_valid_dwst = 0;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=612=mac80211_hwsim_nan_exec_state_transitions(struct mac80211_hwsim_data data)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-625-\tif (data-\u003enan.master_transition_score \u003c 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:626:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_MASTER;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:627:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_MASTER \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-628-\t\t data-\u003enan.master_transition_score \u003e= 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:629:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:630:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_SYNC \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-631-\t\t data-\u003enan.sync_transition_score \u003e= 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:632:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_NON_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:633:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_NON_SYNC \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-634-\t\t data-\u003enan.sync_transition_score \u003c 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:635:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-636-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-641-\t /\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:642:\tif (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_MASTER \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-643-\t !hrtimer_active(\u0026data-\u003enan.discovery_beacon_timer))\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-653-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:654:\t\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:655:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_WARMUP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-656-\t\t\tdata-\u003enan.random_factor_valid_dwst = NAN_WARMUP_DWST;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-659-\t\t} else {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:660:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_UP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-661-\t\t\tdata-\u003enan.random_factor_valid_dwst =\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=695=mac80211_hwsim_nan_tx_beacon(struct mac80211_hwsim_data data,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-750-\tnan_attr.length = cpu_to_le16(sizeof(master_indication));\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:751:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_UP) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-752-\t\tmaster_indication.master_pref = data-\u003enan.master_pref;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=774=mac80211_hwsim_nan_slot_timer(struct hrtimer timer)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-807-\t\ttx_sync_beacon =\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:808:\t\t\tdata-\u003enan.phase != MAC80211_HWSIM_NAN_PHASE_SCAN \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:809:\t\t\tdata-\u003enan.role != MAC80211_HWSIM_NAN_ROLE_NON_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-810-\t}\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=867=mac80211_hwsim_nan_discovery_beacon_timer(struct hrtimer timer)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-879-\tscoped_guard(spinlock, \u0026data-\u003enan.state_lock) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:880:\t\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN \|\|\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:881:\t\t data-\u003enan.role != MAC80211_HWSIM_NAN_ROLE_MASTER)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-882-\t\t\treturn HRTIMER_NORESTART;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=909=int mac80211_hwsim_nan_start(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-926-\t\t/* Start in the \"scan\" phase and stay there for a little bit /\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:927:\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_SCAN;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-928-\t\tdata-\u003enan.random_factor_valid_dwst = 1;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-930-\t\tdata-\u003enan.master_pref = conf-\u003emaster_pref;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:931:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_MASTER;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-932-\t\tmemset(\u0026data-\u003enan.current_ami, 0,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=1226=bool mac80211_hwsim_nan_receive(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-1235-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:1236:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-1237-\t\treturn channel-\u003ecenter_freq == 2437;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-6-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:7:#ifndef __MAC80211_HWSIM_NAN_H\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:8:#define __MAC80211_HWSIM_NAN_H\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-9-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=10=enum mac80211_hwsim_nan_phase {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:11:\tMAC80211_HWSIM_NAN_PHASE_SCAN,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:12:\tMAC80211_HWSIM_NAN_PHASE_WARMUP,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:13:\tMAC80211_HWSIM_NAN_PHASE_UP,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-14-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=16=enum mac80211_hwsim_nan_role {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:17:\tMAC80211_HWSIM_NAN_ROLE_MASTER,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:18:\tMAC80211_HWSIM_NAN_ROLE_SYNC,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:19:\tMAC80211_HWSIM_NAN_ROLE_NON_SYNC,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-20-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=99=void mac80211_hwsim_nan_local_sched_changed(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-101-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:102:#endif / __MAC80211_HWSIM_NAN_H */\n" }
5/2	2026/06/28 00:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11850 output: 42 thoughts: 1148 Thoughts: Reaching a Conclusion on WorthFuzzing Okay, so here's the breakdown of my thought process. The key is this `MAC80211_HWSIM` config. I see the patch adds a function, `mac80211_hwsim_get_tx_rate`, within `mac80211_hwsim_main.c`. My initial reaction is, "Wait, what's `mac80211_hwsim`?" It's a simulated radio testing tool for mac80211. Good, that makes sense. Then the prompt... it's asking me to evaluate "WorthFuzzing". It gives a condition: return false "if the patch only contains code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware". Ah, there's the catch! It mentions `mac80211_hwsim` as an example of software-emulated hardware. The prompt is trying to trick me. So, what is this prompt REALLY saying? It says, if a code path is impossible to reach in GCE/QEMU, even using `mac80211_hwsim`, then return `false`. But `mac80211_hwsim` is software-emulated hardware. That means it IS reachable in these environments. It's explicitly meant to be fuzzed! I know syzkaller fuzzes this extensively. My reading of this then shifts: "Code paths that are impossible to reach in virtualized environments...even when utilizing software-emulated hardware..." This implies that some code paths are impossible to reach even with `mac80211_hwsim`. But wait, this patch is in `mac80211_hwsim`. It is reachable. And, importantly, this is not a real hardware driver like Intel's WiFi, where a GCE/QEMU would be irrelevant. This patch IS within the emulated hardware and therefore IS reachable. Okay, let's look at the actual code in `mac80211_hwsim_get_tx_rate`. It's filtering out MCS and VHT_MCS rates. It seems like a functional change. The function is used within `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Now, those functions are reachable. `mac80211_hwsim_monitor_rx` handles RX. And, I think `mac80211_hwsim_write_tsf` has something to do with TX. So, I think I've got it. The key focus symbols here are `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Both are reachable when using `mac80211_hwsim`. This is not a dead-end; this patch is operating within the emulator, and therefore this is fuzzer-relevant.
6/2	2026/06/28 00:50	tool	grepper	0m Args: { "Expression": "mac80211_hwsim_write_tsf", "PathPrefix": "drivers/net/wireless/virtual/" } Results: { "Output": "drivers/net/wireless/virtual/mac80211_hwsim_main.c=1575=static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate rate)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1604-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1605:static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data data,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1606-\t\t\t\t struct sk_buff skb, u64 sim_time)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1646=static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1674-\tsim_tsf = mac80211_hwsim_get_sim_tsf();\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1675:\tmac80211_hwsim_write_tsf(data, my_skb, sim_tsf);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1676-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1902=static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1912-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1913:\tmac80211_hwsim_write_tsf(data, skb, sim_tsf);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1914-\n" }
7/2	2026/06/28 00:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 14306 output: 41 thoughts: 244 Thoughts: Analyzing Hot-Path Functions in mac80211_hwsim Okay, so I'm digging into these `mac80211_hwsim` functions. My initial thought is to identify the hot-path ones, which are the ones we need to be most concerned about in terms of performance. It seems that `mac80211_hwsim_write_tsf` is called from `mac80211_hwsim_tx_frame_nl` and `mac80211_hwsim_tx_frame_no_nl`, and those are TX functions. So, intuitively, they're probably on the hot path, since TX operations are usually performance-sensitive. But, these are specific to hwsim. Let's dig deeper to see if this is the case. Then there is `mac80211_hwsim_get_tx_rate`, but wait a second. That looks static, so it could very well be inlined. I should probably focus on other functions. Let's switch gears and focus on `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Those seem like better candidates. And, of course, the TX functions, `mac80211_hwsim_tx_frame_nl` and `mac80211_hwsim_tx_frame_no_nl`. Hang on, let me quickly check where `mac80211_hwsim_monitor_rx` is called from. That's a key piece of information.
8/2	2026/06/28 00:50	tool	grepper	0m Args: { "Expression": "mac80211_hwsim_monitor_rx", "PathPrefix": "drivers/net/wireless/virtual/" } Results: { "Output": "drivers/net/wireless/virtual/mac80211_hwsim_main.c=1328=mac80211_hwsim_get_tx_rate(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1337-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1338:static void mac80211_hwsim_monitor_rx(struct ieee80211_hw hw,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1339-\t\t\t\t struct sk_buff tx_skb,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1902=static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1914-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1915:\tmac80211_hwsim_monitor_rx(hw, skb, chan);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1916-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=6331=static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-6390-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:6391:\tmac80211_hwsim_monitor_rx(data2-\u003ehw, skb, data2-\u003echannel);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-6392-\n" }
9/2	2026/06/28 00:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15482 output: 154 thoughts: 263 Thoughts: My Assessment of Key Functions and Configurations Okay, let's break this down. My initial observation is that `mac80211_hwsim_monitor_rx` is critical, called as it is from both `mac80211_hwsim_tx_frame_no_nl` and `hwsim_tx_info_frame_received_nl`. That makes it a strong candidate for closer inspection. I'll also bring `mac80211_hwsim_write_tsf` into the mix as a FocusSymbol. I had initially thought of including `mac80211_hwsim_get_tx_rate`, but since it's a static function, maybe it's less critical for the current analysis, I'll go with the other two for now. Now, concerning configurations, I initially believed `MAC80211_HWSIM` was the sole requirement. However, it's always wise to double-check these assumptions. I should confirm that there aren't any other dependencies, even if they aren't immediately obvious. A quick review confirms that `MAC80211_HWSIM` depends on `MAC80211` and `CFG80211`. But ultimately, when considering the original concern, returning `MAC80211_HWSIM` should suffice for now.
10/2	2026/06/28 00:50	tool	set-results	0m Args: { "EnableConfigs": [ "MAC80211_HWSIM" ], "FocusSymbols": [ "mac80211_hwsim_get_tx_rate", "mac80211_hwsim_monitor_rx", "mac80211_hwsim_write_tsf" ], "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.", "WorthFuzzing": true } Results: { "EnableConfigs": [ "MAC80211_HWSIM" ], "FocusSymbols": [ "mac80211_hwsim_get_tx_rate", "mac80211_hwsim_monitor_rx", "mac80211_hwsim_write_tsf" ], "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.", "WorthFuzzing": true }

{
  "EnableConfigs": [
    "MAC80211_HWSIM"
  ],
  "FocusSymbols": [
    "mac80211_hwsim_get_tx_rate",
    "mac80211_hwsim_monitor_rx",
    "mac80211_hwsim_write_tsf"
  ],
  "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.",
  "WorthFuzzing": true
}

{
  "PatchDiff": "commit d2d7cc786c48868d54baa4a1e3524a18e06e8b67\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sun Jun 28 00:50:28 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c\nindex 0dd8a6c8595344..4a66272526f340 100644\n--- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c\n+++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c\n@@ -1324,6 +1324,17 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,\n \t}\n }\n \n+static struct ieee80211_rate *\n+mac80211_hwsim_get_tx_rate(struct ieee80211_hw *hw,\n+\t\t\t   struct ieee80211_tx_info *info)\n+{\n+\tif (info-\u003econtrol.rates[0].flags \u0026\n+\t    (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))\n+\t\treturn NULL;\n+\n+\treturn ieee80211_get_tx_rate(hw, info);\n+}\n+\n static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,\n \t\t\t\t      struct sk_buff *tx_skb,\n \t\t\t\t      struct ieee80211_channel *chan)\n@@ -1333,7 +1344,7 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,\n \tstruct hwsim_radiotap_hdr *hdr;\n \tu16 flags, bitrate;\n \tstruct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);\n-\tstruct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);\n+\tstruct ieee80211_rate *txrate = mac80211_hwsim_get_tx_rate(hw, info);\n \n \tif (!txrate)\n \t\tbitrate = 0;\n@@ -1603,7 +1614,7 @@ static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data *data,\n \n \tspin_lock_bh(\u0026data-\u003etsf_offset_lock);\n \n-\ttxrate = ieee80211_get_tx_rate(data-\u003ehw, info);\n+\ttxrate = mac80211_hwsim_get_tx_rate(data-\u003ehw, info);\n \tif (txrate)\n \t\tbitrate = txrate-\u003ebitrate;\n \n"
}

gemini-3.1-pro-preview

{
  "EnableConfigs": [
    "MAC80211_HWSIM"
  ],
  "FocusSymbols": [
    "mac80211_hwsim_get_tx_rate",
    "mac80211_hwsim_monitor_rx",
    "mac80211_hwsim_write_tsf"
  ],
  "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.",
  "WorthFuzzing": true
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. List them in the EnableConfigs output array,
   and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit d2d7cc786c48868d54baa4a1e3524a18e06e8b67
Author: syz-cluster <triage@syzkaller.com>
Date:   Sun Jun 28 00:50:28 2026 +0000

    syz-cluster: applied patch under review

diff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
index 0dd8a6c8595344..4a66272526f340 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
@@ -1324,6 +1324,17 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 	}
 }
 
+static struct ieee80211_rate *
+mac80211_hwsim_get_tx_rate(struct ieee80211_hw *hw,
+			   struct ieee80211_tx_info *info)
+{
+	if (info->control.rates[0].flags &
+	    (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
+		return NULL;
+
+	return ieee80211_get_tx_rate(hw, info);
+}
+
 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 				      struct sk_buff *tx_skb,
 				      struct ieee80211_channel *chan)
@@ -1333,7 +1344,7 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 	struct hwsim_radiotap_hdr *hdr;
 	u16 flags, bitrate;
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
-	struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
+	struct ieee80211_rate *txrate = mac80211_hwsim_get_tx_rate(hw, info);
 
 	if (!txrate)
 		bitrate = 0;
@@ -1603,7 +1614,7 @@ static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data *data,
 
 	spin_lock_bh(&data->tsf_offset_lock);
 
-	txrate = ieee80211_get_tx_rate(data->hw, info);
+	txrate = mac80211_hwsim_get_tx_rate(data->hw, info);
 	if (txrate)
 		bitrate = txrate->bitrate;

gemini-3.1-pro-preview

							input: 2372
							output: 38
							thoughts: 199

**Analyzing the mac80211_hwsim Patch**

Okay, so I'm looking at this patch in `drivers/net/wireless/virtual/mac80211_hwsim_main.c`. It seems they've added a function called `mac80211_hwsim_get_tx_rate`.  From a quick glance, it's just a wrapper around `ieee80211_get_tx_rate`.  The interesting part is the conditional: it's checking `info->control.rates[0].flags` for `IEEE80211_TX_RC_MCS` or `IEEE80211_TX_RC_VHT_MCS` and returning `NULL` if either is set. That suggests it's explicitly *avoiding* handling MCS or VHT MCS rates in some contexts. The code uses this function in `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`, so those functions might not support MCS/VHT.

Right, let me just double-check the configuration options for this file. It looks like the relevant configuration is `MAC80211_HWSIM`. I'll need to remember that.

{
  "Expression": "MAC80211_HWSIM",
  "PathPrefix": "drivers/net/wireless/virtual/"
}

{
  "Output": "drivers/net/wireless/virtual/Kconfig:1:config MAC80211_HWSIM\ndrivers/net/wireless/virtual/Kconfig-2-\ttristate \"Simulated radio testing tool for mac80211\"\n--\ndrivers/net/wireless/virtual/Makefile:1:obj-$(CONFIG_MAC80211_HWSIM)\t+= mac80211_hwsim.o\ndrivers/net/wireless/virtual/Makefile-2-mac80211_hwsim-objs\t\t+= mac80211_hwsim_main.o\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-8-\ndrivers/net/wireless/virtual/mac80211_hwsim.h:9:#ifndef __MAC80211_HWSIM_H\ndrivers/net/wireless/virtual/mac80211_hwsim.h:10:#define __MAC80211_HWSIM_H\ndrivers/net/wireless/virtual/mac80211_hwsim.h-11-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=217=struct hwsim_tx_rate {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-230- *\ndrivers/net/wireless/virtual/mac80211_hwsim.h:231: * @MAC80211_HWSIM_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:232: * @MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.\ndrivers/net/wireless/virtual/mac80211_hwsim.h-233- *\tThis is set if the current BSS requires ERP protection.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:234: * @MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:235: * @MAC80211_HWSIM_TX_RC_MCS: HT rate.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:236: * @MAC80211_HWSIM_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is\ndrivers/net/wireless/virtual/mac80211_hwsim.h-237- *\tsplit into a higher 4 bits (Nss) and lower 4 bits (MCS number)\ndrivers/net/wireless/virtual/mac80211_hwsim.h:238: * @MAC80211_HWSIM_TX_RC_GREEN_FIELD: Indicates whether this rate should be used\ndrivers/net/wireless/virtual/mac80211_hwsim.h-239- *\tin Greenfield mode.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:240: * @MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be\ndrivers/net/wireless/virtual/mac80211_hwsim.h-241- *\t40 MHz.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:242: * @MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission\ndrivers/net/wireless/virtual/mac80211_hwsim.h:243: * @MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission\ndrivers/net/wireless/virtual/mac80211_hwsim.h-244- *\t(80+80 isn't supported yet)\ndrivers/net/wireless/virtual/mac80211_hwsim.h:245: * @MAC80211_HWSIM_TX_RC_DUP_DATA: The frame should be transmitted on both of\ndrivers/net/wireless/virtual/mac80211_hwsim.h-246- *\tthe adjacent 20 MHz channels, if the current channel type is\ndrivers/net/wireless/virtual/mac80211_hwsim.h-247- *\tNL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.\ndrivers/net/wireless/virtual/mac80211_hwsim.h:248: * @MAC80211_HWSIM_TX_RC_SHORT_GI: Short Guard interval should be used for this\ndrivers/net/wireless/virtual/mac80211_hwsim.h-249- *\trate.\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=251=enum hwsim_tx_rate_flags {\ndrivers/net/wireless/virtual/mac80211_hwsim.h:252:\tMAC80211_HWSIM_TX_RC_USE_RTS_CTS\t\t= BIT(0),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:253:\tMAC80211_HWSIM_TX_RC_USE_CTS_PROTECT\t\t= BIT(1),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:254:\tMAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE\t= BIT(2),\ndrivers/net/wireless/virtual/mac80211_hwsim.h-255-\ndrivers/net/wireless/virtual/mac80211_hwsim.h-256-\t/* rate index is an HT/VHT MCS instead of an index */\ndrivers/net/wireless/virtual/mac80211_hwsim.h:257:\tMAC80211_HWSIM_TX_RC_MCS\t\t\t= BIT(3),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:258:\tMAC80211_HWSIM_TX_RC_GREEN_FIELD\t\t= BIT(4),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:259:\tMAC80211_HWSIM_TX_RC_40_MHZ_WIDTH\t\t= BIT(5),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:260:\tMAC80211_HWSIM_TX_RC_DUP_DATA\t\t= BIT(6),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:261:\tMAC80211_HWSIM_TX_RC_SHORT_GI\t\t= BIT(7),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:262:\tMAC80211_HWSIM_TX_RC_VHT_MCS\t\t\t= BIT(8),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:263:\tMAC80211_HWSIM_TX_RC_80_MHZ_WIDTH\t\t= BIT(9),\ndrivers/net/wireless/virtual/mac80211_hwsim.h:264:\tMAC80211_HWSIM_TX_RC_160_MHZ_WIDTH\t\t= BIT(10),\ndrivers/net/wireless/virtual/mac80211_hwsim.h-265-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h=328=enum hwsim_rate_info_attributes {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim.h-347-\ndrivers/net/wireless/virtual/mac80211_hwsim.h:348:#endif /* __MAC80211_HWSIM_H */\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-9-\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:10:#ifndef __MAC80211_HWSIM_I_H\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:11:#define __MAC80211_HWSIM_I_H\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-12-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h=165=void ieee80211_hwsim_wake_tx_queue(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h-167-\ndrivers/net/wireless/virtual/mac80211_hwsim_i.h:168:#endif /* __MAC80211_HWSIM_I_H */\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=712=static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-716-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:717:/* MAC80211_HWSIM netlink family */\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-718-static struct genl_family hwsim_genl_family;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=724=static const struct genl_multicast_group hwsim_mcgrps[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-727-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:728:/* MAC80211_HWSIM netlink policy */\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-729-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=865=static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-901-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:902:/* MAC80211_HWSIM virtio queues */\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-903-static struct virtqueue *hwsim_vqs[HWSIM_NUM_VQS];\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1575=static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1579-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_RTS_CTS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1580:\t\tresult |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1581-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_CTS_PROTECT)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1582:\t\tresult |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1583-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_USE_SHORT_PREAMBLE)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1584:\t\tresult |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1585-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_MCS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1586:\t\tresult |= MAC80211_HWSIM_TX_RC_MCS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1587-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_GREEN_FIELD)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1588:\t\tresult |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1589-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_40_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1590:\t\tresult |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1591-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_DUP_DATA)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1592:\t\tresult |= MAC80211_HWSIM_TX_RC_DUP_DATA;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1593-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_SHORT_GI)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1594:\t\tresult |= MAC80211_HWSIM_TX_RC_SHORT_GI;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1595-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_VHT_MCS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1596:\t\tresult |= MAC80211_HWSIM_TX_RC_VHT_MCS;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1597-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_80_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1598:\t\tresult |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1599-\tif (rate-\u003eflags \u0026 IEEE80211_TX_RC_160_MHZ_WIDTH)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1600:\t\tresult |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1601-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3473=static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3483-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3484:#define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3485-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3495=static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3498-\tif (sset == ETH_SS_STATS)\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3499:\t\treturn MAC80211_HWSIM_SSTATS_LEN;\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3500-\treturn 0;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=3503=static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3518-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:3519:\tWARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-3520-}\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=5623=static const u8 iftypes_ext_capa_ap[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5631-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:5632:#define MAC80211_HWSIM_MLD_CAPA_OPS\t\t\t\t\\\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5633-\tFIELD_PREP_CONST(IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP, \\\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=5638=static const struct wiphy_iftype_ext_capab mac80211_hwsim_iftypes_ext_capa[] = {\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5645-\t\t\t\t    IEEE80211_EML_CAP_EMLMR_SUPPORT,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:5646:\t\t.mld_capa_and_ops = MAC80211_HWSIM_MLD_CAPA_OPS,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-5647-\t},\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=7094=static struct genl_family hwsim_genl_family __ro_after_init = {\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7095:\t.name = \"MAC80211_HWSIM\",\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7096-\t.version = 1,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=7413=static void hwsim_virtio_remove(struct virtio_device *vdev)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7421-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7422:/* MAC80211_HWSIM virtio device id table */\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7423-static const struct virtio_device_id id_table[] = {\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:7424:\t{ VIRTIO_ID_MAC80211_HWSIM, VIRTIO_DEV_ANY_ID },\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-7425-\t{ 0 }\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=78=static u64 hwsim_nan_get_master_rank(struct mac80211_hwsim_data *data)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-82-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:83:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_UP) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-84-\t\tmaster_pref = data-\u003enan.master_pref;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=216=void mac80211_hwsim_nan_rx(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-273-\tif ((slot != SLOT_24GHZ_DW \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:274:\t     data-\u003enan.phase != MAC80211_HWSIM_NAN_PHASE_SCAN) ||\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-275-\t    rx_status.freq != 2437)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-436-\t\t    (cg == own_cg \u0026\u0026 frame_amr \u003e curr_amr) ||\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:437:\t\t    data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-438-\t\t\t/* Avoid a state transition */\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-468-\t\t\t */\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:469:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_UP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-470-\t\t\tdata-\u003enan.random_factor_valid_dwst = 0;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=612=mac80211_hwsim_nan_exec_state_transitions(struct mac80211_hwsim_data *data)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-625-\tif (data-\u003enan.master_transition_score \u003c 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:626:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_MASTER;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:627:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_MASTER \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-628-\t\t data-\u003enan.master_transition_score \u003e= 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:629:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:630:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_SYNC \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-631-\t\t data-\u003enan.sync_transition_score \u003e= 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:632:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_NON_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:633:\telse if (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_NON_SYNC \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-634-\t\t data-\u003enan.sync_transition_score \u003c 3)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:635:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-636-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-641-\t */\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:642:\tif (data-\u003enan.role == MAC80211_HWSIM_NAN_ROLE_MASTER \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-643-\t    !hrtimer_active(\u0026data-\u003enan.discovery_beacon_timer))\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-653-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:654:\t\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:655:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_WARMUP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-656-\t\t\tdata-\u003enan.random_factor_valid_dwst = NAN_WARMUP_DWST;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-659-\t\t} else {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:660:\t\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_UP;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-661-\t\t\tdata-\u003enan.random_factor_valid_dwst =\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=695=mac80211_hwsim_nan_tx_beacon(struct mac80211_hwsim_data *data,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-750-\tnan_attr.length = cpu_to_le16(sizeof(master_indication));\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:751:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_UP) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-752-\t\tmaster_indication.master_pref = data-\u003enan.master_pref;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=774=mac80211_hwsim_nan_slot_timer(struct hrtimer *timer)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-807-\t\ttx_sync_beacon =\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:808:\t\t\tdata-\u003enan.phase != MAC80211_HWSIM_NAN_PHASE_SCAN \u0026\u0026\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:809:\t\t\tdata-\u003enan.role != MAC80211_HWSIM_NAN_ROLE_NON_SYNC;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-810-\t}\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=867=mac80211_hwsim_nan_discovery_beacon_timer(struct hrtimer *timer)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-879-\tscoped_guard(spinlock, \u0026data-\u003enan.state_lock) {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:880:\t\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN ||\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:881:\t\t    data-\u003enan.role != MAC80211_HWSIM_NAN_ROLE_MASTER)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-882-\t\t\treturn HRTIMER_NORESTART;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=909=int mac80211_hwsim_nan_start(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-926-\t\t/* Start in the \"scan\" phase and stay there for a little bit */\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:927:\t\tdata-\u003enan.phase = MAC80211_HWSIM_NAN_PHASE_SCAN;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-928-\t\tdata-\u003enan.random_factor_valid_dwst = 1;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-930-\t\tdata-\u003enan.master_pref = conf-\u003emaster_pref;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:931:\t\tdata-\u003enan.role = MAC80211_HWSIM_NAN_ROLE_MASTER;\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-932-\t\tmemset(\u0026data-\u003enan.current_ami, 0,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c=1226=bool mac80211_hwsim_nan_receive(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-1235-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c:1236:\tif (data-\u003enan.phase == MAC80211_HWSIM_NAN_PHASE_SCAN)\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.c-1237-\t\treturn channel-\u003ecenter_freq == 2437;\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-6-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:7:#ifndef __MAC80211_HWSIM_NAN_H\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:8:#define __MAC80211_HWSIM_NAN_H\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-9-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=10=enum mac80211_hwsim_nan_phase {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:11:\tMAC80211_HWSIM_NAN_PHASE_SCAN,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:12:\tMAC80211_HWSIM_NAN_PHASE_WARMUP,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:13:\tMAC80211_HWSIM_NAN_PHASE_UP,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-14-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=16=enum mac80211_hwsim_nan_role {\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:17:\tMAC80211_HWSIM_NAN_ROLE_MASTER,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:18:\tMAC80211_HWSIM_NAN_ROLE_SYNC,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:19:\tMAC80211_HWSIM_NAN_ROLE_NON_SYNC,\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-20-};\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h=99=void mac80211_hwsim_nan_local_sched_changed(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h-101-\ndrivers/net/wireless/virtual/mac80211_hwsim_nan.h:102:#endif /* __MAC80211_HWSIM_NAN_H */\n"
}

gemini-3.1-pro-preview

							input: 11850
							output: 42
							thoughts: 1148

**Reaching a Conclusion on WorthFuzzing**

Okay, so here's the breakdown of my thought process. The key is this `MAC80211_HWSIM` config. I see the patch adds a function, `mac80211_hwsim_get_tx_rate`, within `mac80211_hwsim_main.c`. My initial reaction is, "Wait, what's `mac80211_hwsim`?" It's a simulated radio testing tool for mac80211. Good, that makes sense. Then the prompt... it's asking me to evaluate "WorthFuzzing". It gives a condition: return false "if the patch only contains code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware". Ah, there's the catch! It mentions `mac80211_hwsim` as an example of software-emulated hardware.

The prompt is trying to trick me. So, what is this prompt REALLY saying? It says, if a code path is impossible to reach in GCE/QEMU, even using `mac80211_hwsim`, then return `false`. But `mac80211_hwsim` *is* software-emulated hardware. That means it IS reachable in these environments. It's explicitly *meant* to be fuzzed! I know syzkaller fuzzes this extensively.

My reading of this then shifts: "Code paths that are impossible to reach in virtualized environments...even when utilizing software-emulated hardware..." This implies that some code paths are impossible to reach *even with* `mac80211_hwsim`. But wait, this patch *is* *in* `mac80211_hwsim`. It is reachable. And, importantly, this is not a real hardware driver like Intel's WiFi, where a GCE/QEMU would be irrelevant. This patch IS within the emulated hardware and therefore IS reachable.

Okay, let's look at the actual code in `mac80211_hwsim_get_tx_rate`. It's filtering out MCS and VHT_MCS rates. It seems like a functional change. The function is used within `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Now, those functions *are* reachable. `mac80211_hwsim_monitor_rx` handles RX. And, I think `mac80211_hwsim_write_tsf` has something to do with TX.

So, I think I've got it. The key focus symbols here are `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Both are reachable when using `mac80211_hwsim`. This is *not* a dead-end; this patch is operating within the emulator, and therefore this is fuzzer-relevant.

{
  "Expression": "mac80211_hwsim_write_tsf",
  "PathPrefix": "drivers/net/wireless/virtual/"
}

{
  "Output": "drivers/net/wireless/virtual/mac80211_hwsim_main.c=1575=static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1604-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1605:static void mac80211_hwsim_write_tsf(struct mac80211_hwsim_data *data,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1606-\t\t\t\t     struct sk_buff *skb, u64 sim_time)\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1646=static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1674-\tsim_tsf = mac80211_hwsim_get_sim_tsf();\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1675:\tmac80211_hwsim_write_tsf(data, my_skb, sim_tsf);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1676-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1902=static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1912-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1913:\tmac80211_hwsim_write_tsf(data, skb, sim_tsf);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1914-\n"
}

gemini-3.1-pro-preview

							input: 14306
							output: 41
							thoughts: 244

**Analyzing Hot-Path Functions in mac80211_hwsim**

Okay, so I'm digging into these `mac80211_hwsim` functions. My initial thought is to identify the hot-path ones, which are the ones we need to be most concerned about in terms of performance. It seems that `mac80211_hwsim_write_tsf` is called from `mac80211_hwsim_tx_frame_nl` and `mac80211_hwsim_tx_frame_no_nl`, and those are TX functions. So, intuitively, they're probably on the hot path, since TX operations are usually performance-sensitive. But, these are specific to hwsim. Let's dig deeper to see if this is the case.

Then there is `mac80211_hwsim_get_tx_rate`, but wait a second. That looks static, so it could very well be inlined. I should probably focus on other functions.

Let's switch gears and focus on `mac80211_hwsim_monitor_rx` and `mac80211_hwsim_write_tsf`. Those seem like better candidates. And, of course, the TX functions, `mac80211_hwsim_tx_frame_nl` and `mac80211_hwsim_tx_frame_no_nl`.

Hang on, let me quickly check where `mac80211_hwsim_monitor_rx` is called from. That's a key piece of information.

{
  "Expression": "mac80211_hwsim_monitor_rx",
  "PathPrefix": "drivers/net/wireless/virtual/"
}

{
  "Output": "drivers/net/wireless/virtual/mac80211_hwsim_main.c=1328=mac80211_hwsim_get_tx_rate(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1337-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1338:static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1339-\t\t\t\t      struct sk_buff *tx_skb,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=1902=static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1914-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:1915:\tmac80211_hwsim_monitor_rx(hw, skb, chan);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-1916-\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c=6331=static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,\n--\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-6390-\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c:6391:\tmac80211_hwsim_monitor_rx(data2-\u003ehw, skb, data2-\u003echannel);\ndrivers/net/wireless/virtual/mac80211_hwsim_main.c-6392-\n"
}

gemini-3.1-pro-preview

							input: 15482
							output: 154
							thoughts: 263

**My Assessment of Key Functions and Configurations**

Okay, let's break this down. My initial observation is that `mac80211_hwsim_monitor_rx` is critical, called as it is from both `mac80211_hwsim_tx_frame_no_nl` and `hwsim_tx_info_frame_received_nl`. That makes it a strong candidate for closer inspection. I'll also bring `mac80211_hwsim_write_tsf` into the mix as a FocusSymbol. I had initially thought of including `mac80211_hwsim_get_tx_rate`, but since it's a static function, maybe it's less critical for the current analysis, I'll go with the other two for now.

Now, concerning configurations, I initially believed `MAC80211_HWSIM` was the sole requirement. However, it's always wise to double-check these assumptions. I should confirm that there aren't any other dependencies, even if they aren't immediately obvious. A quick review confirms that `MAC80211_HWSIM` depends on `MAC80211` and `CFG80211`. But ultimately, when considering the original concern, returning `MAC80211_HWSIM` should suffice for now.

{
  "EnableConfigs": [
    "MAC80211_HWSIM"
  ],
  "FocusSymbols": [
    "mac80211_hwsim_get_tx_rate",
    "mac80211_hwsim_monitor_rx",
    "mac80211_hwsim_write_tsf"
  ],
  "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "MAC80211_HWSIM"
  ],
  "FocusSymbols": [
    "mac80211_hwsim_get_tx_rate",
    "mac80211_hwsim_monitor_rx",
    "mac80211_hwsim_write_tsf"
  ],
  "Reasoning": "The patch modifies the simulated mac80211 hardware driver (mac80211_hwsim) to filter out MCS and VHT_MCS rates when getting the TX rate. This is a functional change in a driver that is heavily fuzzed and reachable in virtualized environments.",
  "WorthFuzzing": true
}

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)