bisecting fixing commit since 255b58a2b3af0baa0ee11507390349217b8b73b0
building syzkaller on 3e5ed8b45e7a561d6344a4d3d7bf3bfb8f24a7b3
testing commit 255b58a2b3af0baa0ee11507390349217b8b73b0
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 958ce33b08e47410f62d4f4408adc46d9401cb4b6b2bc02d7f6405d70f5b5492
all runs: crashed: WARNING in __cfg80211_ibss_joined
testing current HEAD 4938296e03bd227e5020d63d418956fe52baf97c
testing commit 4938296e03bd227e5020d63d418956fe52baf97c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 96248a77822a8db1cb17cd75ce88d64ce340ca971579b04c3086d25ec03f7bfb
all runs: crashed: WARNING in __cfg80211_ibss_joined
revisions tested: 2, total time: 23m14.530016021s (build: 16m20.103404005s, test: 6m27.511036149s)
the crash still happens on HEAD
commit msg: Linux 4.19.198
crash: WARNING in __cfg80211_ibss_joined
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9801 at net/wireless/ibss.c:36 __cfg80211_ibss_joined.cold.2+0x32/0x39 net/wireless/ibss.c:36
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9801 Comm: kworker/u4:6 Not tainted 4.19.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: cfg80211 cfg80211_event_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x17c/0x226 lib/dump_stack.c:118
 panic+0x1cd/0x375 kernel/panic.c:186
 __warn.cold.7+0x1b/0x36 kernel/panic.c:541
 report_bug+0x1a1/0x200 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__cfg80211_ibss_joined.cold.2+0x32/0x39 net/wireless/ibss.c:36
Code: 22 20 e2 ff 0f 0b e9 8b 43 7f ff 48 c7 c7 e0 c1 f5 88 e8 0f 20 e2 ff 0f 0b e9 56 44 7f ff 48 c7 c7 e0 c1 f5 88 e8 fc 1f e2 ff <0f> 0b e9 65 43 7f ff 48 c7 c7 e0 c1 f5 88 e8 e9 1f e2 ff 0f 0b 48
RSP: 0018:ffff888092effc00 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff8880985a60d0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff88502140 RDI: ffffffff8bada720
RBP: ffff888092effca0 R08: ffffed1017464e99 R09: ffffed1017464e98
R10: ffffed1017464e98 R11: ffff8880ba3274c7 R12: 1ffff110125dff82
R13: ffff8880985a5600 R14: ffff88809aeaf018 R15: 0000000000000000
 cfg80211_process_wdev_events+0x35d/0x510 net/wireless/util.c:886
 cfg80211_process_rdev_events+0x55/0xc0 net/wireless/util.c:912
 cfg80211_event_work+0x19/0x30 net/wireless/core.c:305
 process_one_work+0x7b9/0x15a0 kernel/workqueue.c:2153
 worker_thread+0x85/0xb60 kernel/workqueue.c:2296
 kthread+0x347/0x410 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..