WARNING in __cfg80211_ibss_joined

Status: upstream: reported C repro on 2020/09/24 13:20
Reported-by: syzbot+2da49cf28199dad792b6@syzkaller.appspotmail.com
First crash: 2128d, last: 1250d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __cfg80211_ibss_joined wireless -1 8 2332d 2352d 0/29 auto-closed as invalid on 2020/07/02 02:22
linux-6.6 WARNING in __cfg80211_ibss_joined -1 syz 155 1d08h 399d 0/2 upstream: reported syz repro on 2025/06/19 03:38
linux-5.15 WARNING in __cfg80211_ibss_joined missing-backport origin:upstream -1 C 255 1d02h 1233d 0/3 upstream: reported C repro on 2023/03/08 19:50
linux-6.1 WARNING in __cfg80211_ibss_joined origin:upstream missing-backport -1 C inconclusive 357 11h40m 1223d 0/3 upstream: reported C repro on 2023/03/18 13:26
upstream WARNING in __cfg80211_ibss_joined (2) prio:high wireless -1 C error 6971 18h43m 2128d 0/29 upstream: reported C repro on 2020/09/24 09:26
linux-4.19 WARNING in __cfg80211_ibss_joined -1 C 236 1242d 2090d 0/1 upstream: reported C repro on 2020/11/01 17:19
▶ ▼ Fix bisection attempts (25)
Created Duration User Patch Repo Result
2023/02/19 10:12 41m bisect fix linux-4.14.y OK (0) job log log
2023/01/20 02:13 35m bisect fix linux-4.14.y OK (0) job log log
2022/10/27 00:07 33m bisect fix linux-4.14.y OK (0) job log log
2022/09/19 07:57 30m bisect fix linux-4.14.y OK (0) job log log
2022/08/20 07:26 30m bisect fix linux-4.14.y OK (0) job log log
2022/07/21 06:57 29m bisect fix linux-4.14.y OK (0) job log log
2022/06/21 06:26 30m bisect fix linux-4.14.y OK (0) job log log
2022/05/22 05:56 29m bisect fix linux-4.14.y OK (0) job log log
2022/04/22 01:13 28m bisect fix linux-4.14.y OK (0) job log log
2022/03/23 00:43 29m bisect fix linux-4.14.y OK (0) job log log
2022/02/20 09:00 35m bisect fix linux-4.14.y OK (0) job log log
2022/01/21 08:28 31m bisect fix linux-4.14.y OK (0) job log log
2021/12/22 07:59 29m bisect fix linux-4.14.y OK (0) job log log
2021/11/22 07:29 29m bisect fix linux-4.14.y OK (0) job log log
2021/10/23 06:58 31m bisect fix linux-4.14.y OK (0) job log log
2021/09/22 13:17 31m bisect fix linux-4.14.y OK (0) job log log
2021/08/23 12:09 32m bisect fix linux-4.14.y OK (0) job log log
2021/07/24 11:33 29m bisect fix linux-4.14.y OK (0) job log log
2021/06/24 10:59 28m bisect fix linux-4.14.y OK (0) job log log
2021/05/25 04:52 34m bisect fix linux-4.14.y OK (0) job log log
2021/04/25 03:04 40m bisect fix linux-4.14.y OK (0) job log log
2021/03/25 18:59 33m bisect fix linux-4.14.y OK (0) job log log
2021/02/23 18:24 34m bisect fix linux-4.14.y OK (0) job log log
2021/01/22 08:35 35m bisect fix linux-4.14.y OK (0) job log log
2020/12/23 07:58 37m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2332 at net/wireless/ibss.c:36 __cfg80211_ibss_joined+0x33a/0x3d0 net/wireless/ibss.c:36
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2332 Comm: kworker/u4:3 Not tainted 4.14.198-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:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x4b kernel/panic.c:547
 report_bug+0x208/0x249 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:__cfg80211_ibss_joined+0x33a/0x3d0 net/wireless/ibss.c:36
RSP: 0018:ffff8880a1bbfc48 EFLAGS: 00010297
RAX: ffff8880a1bb4240 RBX: ffff8880a0c9cd50 RCX: 1ffff1101437696c
RDX: 0000000000000000 RSI: ffff8880a1bb4b40 RDI: ffff8880a1bb4ac4
RBP: ffff8880a0c9c280 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11014377f8a
R13: ffff8880a031f118 R14: 0000000000000000 R15: ffff8880a0c9cdc8
 cfg80211_process_wdev_events+0x1f5/0x580 net/wireless/util.c:961
 cfg80211_process_rdev_events+0x63/0xa0 net/wireless/util.c:984
 cfg80211_event_work+0x1a/0x20 net/wireless/core.c:305
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/10/05 00:54 linux-4.14.y cbfa1702aaf6 5ef9c291 .config console log report syz C ci2-linux-4-14
2020/09/24 16:55 linux-4.14.y cbfa1702aaf6 54289b08 .config console log report syz C ci2-linux-4-14
2020/10/24 07:20 linux-4.14.y 5b7a52cd2eef 2bb6666c .config console log report info ci2-linux-4-14
2020/10/14 12:25 linux-4.14.y cbfa1702aaf6 fc7735a2 .config console log report info ci2-linux-4-14
2020/10/07 15:36 linux-4.14.y cbfa1702aaf6 1880b4a9 .config console log report info ci2-linux-4-14
2020/10/06 21:54 linux-4.14.y cbfa1702aaf6 1880b4a9 .config console log report info ci2-linux-4-14
2020/10/01 04:40 linux-4.14.y cbfa1702aaf6 a9767fb2 .config console log report info ci2-linux-4-14
2020/09/29 23:06 linux-4.14.y cbfa1702aaf6 5abc3f1a .config console log report info ci2-linux-4-14
2020/09/28 23:28 linux-4.14.y cbfa1702aaf6 1b88c6d5 .config console log report info ci2-linux-4-14
2020/09/25 13:28 linux-4.14.y cbfa1702aaf6 4a006f63 .config console log report info ci2-linux-4-14
2020/09/24 17:20 linux-4.14.y cbfa1702aaf6 54289b08 .config console log report info ci2-linux-4-14
2020/09/24 13:19 linux-4.14.y cbfa1702aaf6 54289b08 .config console log report info ci2-linux-4-14
* Struck through repros no longer work on HEAD.