syzbot


WARNING in __cfg80211_ibss_joined

Status: upstream: reported on 2025/06/19 03:38
Reported-by: syzbot+a32e3087f66d8affe3ec@syzkaller.appspotmail.com
First crash: 1d05h, last: 1d05h
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __cfg80211_ibss_joined wireless 8 1934d 1953d 0/29 auto-closed as invalid on 2020/07/02 02:22
linux-4.14 WARNING in __cfg80211_ibss_joined C 12 851d 1729d 0/1 upstream: reported C repro on 2020/09/24 13:20
linux-5.15 WARNING in __cfg80211_ibss_joined missing-backport origin:upstream C 57 6d01h 834d 0/3 upstream: reported C repro on 2023/03/08 19:50
linux-6.1 WARNING in __cfg80211_ibss_joined origin:upstream missing-backport C inconclusive 67 5d13h 824d 0/3 upstream: reported C repro on 2023/03/18 13:26
upstream WARNING in __cfg80211_ibss_joined (2) wireless C error 6765 1d08h 1730d 0/29 upstream: reported C repro on 2020/09/24 09:26
linux-4.19 WARNING in __cfg80211_ibss_joined C 236 844d 1691d 0/1 upstream: reported C repro on 2020/11/01 17:19

Sample crash report:
wlan1: Trigger new scan to find an IBSS to join
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8076 at net/wireless/ibss.c:37 __cfg80211_ibss_joined+0x3c2/0x430 net/wireless/ibss.c:37
Modules linked in:
CPU: 1 PID: 8076 Comm: kworker/u4:16 Not tainted 6.6.93-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: cfg80211 cfg80211_event_work
RIP: 0010:__cfg80211_ibss_joined+0x3c2/0x430 net/wireless/ibss.c:37
Code: 00 00 00 48 3b 84 24 80 00 00 00 75 5c 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 97 b8 bc f7 0f 0b eb c3 e8 8e b8 bc f7 <0f> 0b 4c 8b 6c 24 18 eb b5 e8 80 b8 bc f7 0f 0b e9 e8 fd ff ff e8
RSP: 0018:ffffc900033a7a20 EFLAGS: 00010293
RAX: ffffffff89c8de52 RBX: dffffc0000000000 RCX: ffff888028bf8000
RDX: 0000000000000000 RSI: ffffffff8aaab2c0 RDI: ffffffff8afc6780
RBP: ffffc900033a7af8 R08: ffffffff90d8458f R09: 1ffffffff21b08b1
R10: dffffc0000000000 R11: fffffbfff21b08b2 R12: ffff888030eb4c90
R13: 1ffff92000674f4c R14: ffff88807d9035b8 R15: 000000000000000b
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3e3879 CR3: 000000006bd92000 CR4: 00000000003506e0
DR0: 0000040000000000 DR1: 000000000000000c DR2: 0000000000000006
DR3: 0000000000000006 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cfg80211_process_wdev_events+0x3bc/0x550 net/wireless/util.c:1071
 cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1099
 cfg80211_event_work+0x2f/0x40 net/wireless/core.c:335
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/19 03:37 linux-6.6.y c2603c511feb ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in __cfg80211_ibss_joined
* Struck through repros no longer work on HEAD.