bisecting fixing commit since 9a2dc0e6c531d595bcdf2c66d0be131679bd02df
building syzkaller on 1ba81399e2d03b53a7e631c4ab05f25af1fb1911
testing commit 9a2dc0e6c531d595bcdf2c66d0be131679bd02df
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c84f4511b71f1a49084b3a17530c82e49b05b584fa67eb0ca72c623ee4111771
all runs: crashed: BUG: sleeping function called from invalid context in lock_sock_nested
testing current HEAD b172b44fcb1771e083aad806fa96f3f60e2ddfac
testing commit b172b44fcb1771e083aad806fa96f3f60e2ddfac
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 389e2c04a49f7e174d295268f06c44d09d49533338d8f50d39c187abbac23bbd
run #0: crashed: WARNING in __cfg80211_ibss_joined
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
reproducer seems to be flaky
Reproducer flagged being flaky
revisions tested: 2, total time: 40m33.176547684s (build: 23m27.65672158s, test: 16m10.880278724s)
the crash still happens on HEAD
commit msg: Linux 4.19.206
crash: WARNING in __cfg80211_ibss_joined
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 23 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: 23 Comm: kworker/u4:1 Not tainted 4.19.206-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: 17 1e e2 ff 0f 0b e9 9c 3f 7f ff 48 c7 c7 80 ca f5 88 e8 04 1e e2 ff 0f 0b e9 67 40 7f ff 48 c7 c7 80 ca f5 88 e8 f1 1d e2 ff <0f> 0b e9 76 3f 7f ff 48 c7 c7 80 ca f5 88 e8 de 1d e2 ff 0f 0b 48
RSP: 0018:ffff8880b5b97c00 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff8880a19ba350 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff885023e0 RDI: ffffffff8bad9720
RBP: ffff8880b5b97ca0 R08: ffffed1017464ea9 R09: ffffed1017464ea8
R10: ffffed1017464ea8 R11: ffff8880ba327547 R12: 1ffff11016b72f82
R13: ffff8880a19b9840 R14: ffff8880a0e88d18 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..