syzbot


WARNING in ieee80211_request_ibss_scan (2)

Status: upstream: reported on 2026/01/20 08:16
Reported-by: syzbot+fc4e8edf133b1b2d6cf3@syzkaller.appspotmail.com
First crash: 9d16h, last: 9d16h
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_request_ibss_scan wireless -1 504 2d17h 387d 0/29 upstream: reported on 2025/01/07 16:25
linux-6.1 WARNING in ieee80211_request_ibss_scan -1 24 9d10h 305d 0/3 upstream: reported on 2025/03/30 22:02
linux-5.15 WARNING in ieee80211_request_ibss_scan -1 29 153d 385d 0/3 auto-obsoleted due to no activity on 2025/12/07 14:04

Sample crash report:
wlan1: Trigger new scan to find an IBSS to join
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4562 at net/mac80211/scan.c:1219 ieee80211_request_ibss_scan+0xc7c/0xda0 net/mac80211/scan.c:1219
Modules linked in:
CPU: 1 PID: 4562 Comm: kworker/u4:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: phy12 ieee80211_iface_work
RIP: 0010:ieee80211_request_ibss_scan+0xc7c/0xda0 net/mac80211/scan.c:1219
Code: 4c 89 ff e8 f6 c5 ff ff 89 c3 48 8b 7c 24 30 e8 1a 07 81 00 89 d8 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 24 38 37 f8 <0f> 0b bb f0 ff ff ff eb d7 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 91
RSP: 0000:ffffc9000321fa00 EFLAGS: 00010293
RAX: ffffffff8941d77c RBX: ffff88807d902a20 RCX: ffff88807ca88000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc9000321f7c7 R09: 1ffff92000643ef8
R10: dffffc0000000000 R11: fffff52000643ef9 R12: ffff88807d905e10
R13: ffff88807d900de0 R14: 0000000000000001 R15: ffff88805e850c80
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 0000000062dba000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_sta_find_ibss net/mac80211/ibss.c:-1 [inline]
 ieee80211_ibss_work+0xe05/0x10e0 net/mac80211/ibss.c:1710
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/20 08:19 linux-5.15.y 9eec9a14ee10 572effc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_request_ibss_scan
2026/01/20 08:16 linux-5.15.y 9eec9a14ee10 572effc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_request_ibss_scan
* Struck through repros no longer work on HEAD.