syzbot


WARNING in ieee80211_vif_use_reserved_switch

Status: upstream: reported C repro on 2025/07/10 19:56
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+8adbe2091f52828a621f@syzkaller.appspotmail.com
First crash: 149d, last: 18m
Bug presence (2)
Date Name Commit Repro Result
2025/07/13 linux-6.6.y (ToT) 59a2de10b81a C [report] WARNING in corrupted
2025/07/13 upstream (ToT) 3f31a806a62e C Didn't crash
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/09/14 07:04 2h07m fix candidate upstream OK (0) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at net/mac80211/chan.c:92 ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:90 [inline]
WARNING: CPU: 0 PID: 12 at net/mac80211/chan.c:92 ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline]
WARNING: CPU: 0 PID: 12 at net/mac80211/chan.c:92 ieee80211_vif_use_reserved_switch+0x10e8/0x28f0 net/mac80211/chan.c:1638
Modules linked in:

CPU: 0 PID: 12 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: phy4 ieee80211_csa_finalize_work
RIP: 0010:ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:92 [inline]
RIP: 0010:ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline]
RIP: 0010:ieee80211_vif_use_reserved_switch+0x10e8/0x28f0 net/mac80211/chan.c:1638
Code: 48 89 df e8 da 22 e9 f7 e9 dc fc ff ff e8 30 b4 91 f7 eb 24 e8 29 b4 91 f7 c7 04 24 f4 ff ff ff e9 e4 f5 ff ff e8 18 b4 91 f7 <0f> 0b 0f 0b e9 cf f5 ff ff e8 0a b4 91 f7 48 8b 7c 24 08 4c 8b 7c
RSP: 0018:ffffc900001179c0 EFLAGS: 00010293
RAX: ffffffff89f3e86e RBX: 0000000000000001 RCX: ffff888019e7da00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88802b6755af R09: 1ffff110056ceab5
R10: dffffc0000000000 R11: ffffed10056ceab6 R12: 0000000000000001
R13: ffff88802b6765d9 R14: ffff88807b672c70 R15: ffff88807b672ce8
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe99a0c18 CR3: 000000002e553000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 ieee80211_link_use_reserved_context+0x383/0x5c0 net/mac80211/chan.c:1927
 __ieee80211_csa_finalize net/mac80211/cfg.c:3679 [inline]
 ieee80211_csa_finalize+0x59a/0xf00 net/mac80211/cfg.c:3718
 ieee80211_csa_finalize_work+0xf6/0x140 net/mac80211/cfg.c:3743
 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 (4933):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/29 21:14 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/11/29 19:41 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/11/29 18:07 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/11/29 15:06 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/11/12 10:27 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/09/28 12:21 linux-6.6.y 147338df3487 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/09/03 08:39 linux-6.6.y cc1a1c5b404a 96a211bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/08/22 22:12 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/07/12 01:21 linux-6.6.y 59a2de10b81a 3cda49cf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/07 09:06 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/07 08:03 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/07 06:40 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/07 04:59 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/07 02:42 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/06 11:47 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/06 11:46 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/06 06:13 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 18:18 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 15:25 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 11:45 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 07:19 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 06:08 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 05:01 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 01:52 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/05 01:17 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 23:41 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 20:50 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 15:40 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 14:07 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 10:05 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 08:59 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/04 02:17 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 21:50 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 19:25 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 17:17 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 16:10 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 16:02 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 10:36 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 08:58 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 07:11 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 01:11 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/03 01:07 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 18:18 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 16:45 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 13:52 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 09:06 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 07:24 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 04:39 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 02:58 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/02 00:13 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/01 22:14 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/12/01 22:14 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
2025/07/10 19:56 linux-6.6.y 59a2de10b81a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_vif_use_reserved_switch
* Struck through repros no longer work on HEAD.