[lkml]   [2020]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectWARNING in sta_info_insert_rcu

syzbot found the following issue on:

HEAD commit: eff48dde Merge tag 'trace-v5.9-rc5' of git://git.kernel.or..
git tree: upstream
console output:
kernel config:
dashboard link:
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro:
C reproducer:

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:
final oops:
console output:

IMPORTANT: if you fix the issue, please add the following tag to the commit:

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: 0 PID: 72 at net/mac80211/sta_info.c:529 sta_info_insert_check net/mac80211/sta_info.c:529 [inline]
WARNING: CPU: 0 PID: 72 at net/mac80211/sta_info.c:529 sta_info_insert_rcu+0x27a/0x2ba0 net/mac80211/sta_info.c:707
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 72 Comm: kworker/u4:3 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy4 ieee80211_iface_work
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x198/0x1fd lib/dump_stack.c:118
panic+0x382/0x7fb kernel/panic.c:231
__warn.cold+0x20/0x4b kernel/panic.c:600
report_bug+0x1bd/0x210 lib/bug.c:198
handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:sta_info_insert_check net/mac80211/sta_info.c:529 [inline]
RIP: 0010:sta_info_insert_rcu+0x27a/0x2ba0 net/mac80211/sta_info.c:707
Code: 24 e8 3a 79 b8 f9 0f b6 85 50 ff ff ff 31 ff 83 e0 01 41 89 c7 89 c6 e8 44 75 b8 f9 45 84 ff 0f 84 c5 00 00 00 e8 16 79 b8 f9 <0f> 0b 41 bd ea ff ff ff e8 09 79 b8 f9 48 8b bd 30 ff ff ff e8 ed
RSP: 0018:ffffc90001017958 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888093338c00 RCX: ffffffff87bdc51c
RDX: ffff8880a9394040 RSI: ffffffff87bdc52a RDI: 0000000000000001
RBP: ffffc90001017aa0 R08: 0000000000000000 R09: ffff88809333925f
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000500177e9
R13: ffff8880a8916048 R14: ffff8880a8916000 R15: 0000000000000001
ieee80211_ibss_finish_sta+0x212/0x390 net/mac80211/ibss.c:592
ieee80211_ibss_work+0x2c7/0xe80 net/mac80211/ibss.c:1699
ieee80211_iface_work+0x7d2/0x8f0 net/mac80211/iface.c:1438
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..

This report is generated by a bot. It may contain errors.
See for more information about syzbot.
syzbot engineers can be reached at

syzbot will keep track of this issue. See: for how to communicate with syzbot.
For information about bisection process see:
syzbot can test patches for this issue, for details see:

 \ /
  Last update: 2020-09-24 11:28    [W:0.046 / U:0.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site