WARNING in ieee80211_link_release_channel

Status: upstream: reported on 2025/08/04 22:09
Reported-by: syzbot+47350a473be99ab8cff7@syzkaller.appspotmail.com
First crash: 432d, last: 13h24m
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_link_release_channel wireless -1 syz done done 3 1094d 1133d 0/29 auto-obsoleted due to no activity on 2024/01/21 00:13
linux-6.1 WARNING in ieee80211_link_release_channel -1 syz, C 254 1d01h 434d 0/3 upstream: reported C repro on 2025/08/02 09:20

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 10632 at net/mac80211/chan.c:2022 ieee80211_link_release_channel+0x154/0x180 net/mac80211/chan.c:2022
Modules linked in:
CPU: 1 PID: 10632 Comm: kworker/u4:11 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_link_release_channel+0x154/0x180 net/mac80211/chan.c:2022
Code: 7c 2d 00 00 74 08 48 89 df e8 f8 fa ca f7 bf 60 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 11 38 86 00 e8 ac 19 72 f7 <0f> 0b eb c5 48 c7 c1 ac 8f 6c 8f 80 e1 07 80 c1 03 38 c1 0f 8c 51
RSP: 0018:ffffc90019077568 EFLAGS: 00010293
RAX: ffffffff8a157704 RBX: ffff88805dea5618 RCX: ffff88801b753c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f6c5aef R09: 1ffffffff1ed8b5d
R10: dffffc0000000000 R11: fffffbfff1ed8b5e R12: ffff88805dea6c88
R13: 1ffff1100bbd4ac3 R14: ffff88805dea6440 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200001000000 CR3: 0000000049259000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x1357/0x1910 net/core/dev.c:11200
 unregister_netdevice_many net/core/dev.c:11236 [inline]
 unregister_netdevice_queue+0x2e9/0x330 net/core/dev.c:11116
 unregister_netdevice include/linux/netdevice.h:3194 [inline]
 _cfg80211_unregister_wdev+0x16d/0x580 net/wireless/core.c:1217
 ieee80211_remove_interfaces+0x4b3/0x690 net/mac80211/iface.c:2398
 ieee80211_unregister_hw+0x5d/0x2a0 net/mac80211/main.c:1522
 mac80211_hwsim_del_radio+0x289/0x480 drivers/net/wireless/virtual/mac80211_hwsim.c:5418
 hwsim_exit_net+0x58d/0x650 drivers/net/wireless/virtual/mac80211_hwsim.c:6300
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x6f7/0xb00 net/core/net_namespace.c:656
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 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 (151):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/10 11:55 linux-6.6.y a91a6aa9253c 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/08 22:18 linux-6.6.y a91a6aa9253c b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/08 10:54 linux-6.6.y a91a6aa9253c 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/07 21:42 linux-6.6.y a91a6aa9253c 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/05 20:54 linux-6.6.y a91a6aa9253c af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/05 19:14 linux-6.6.y a91a6aa9253c af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/29 21:57 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/29 11:32 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/28 11:39 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/25 06:10 linux-6.6.y 79643295eba1 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/25 01:55 linux-6.6.y 79643295eba1 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/23 19:18 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/23 14:58 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/21 08:43 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/18 11:50 linux-6.6.y 79643295eba1 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/17 03:18 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/13 13:15 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/13 02:06 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/12 09:27 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/12 05:21 linux-6.6.y 8b73de7da85f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/11 18:20 linux-6.6.y 8b73de7da85f b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/09 08:40 linux-6.6.y 8b73de7da85f 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/09/03 15:00 linux-6.6.y 8b73de7da85f 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/08/15 16:45 linux-6.6.y d27334b2888c 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/07/06 05:18 linux-6.6.y da47cbc25466 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/22 11:32 linux-6.6.y d1cfde2d5d15 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/10 16:46 linux-6.6.y 924b4a879cbb f79bac11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/09 17:57 linux-6.6.y 924b4a879cbb c36c07f6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/06 03:46 linux-6.6.y 924b4a879cbb cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/05 15:34 linux-6.6.y 924b4a879cbb 48b6c3fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/04 05:32 linux-6.6.y 924b4a879cbb 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/02 01:26 linux-6.6.y 924b4a879cbb 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/06/01 13:23 linux-6.6.y 0a40c6fbd105 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/29 16:19 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/28 17:16 linux-6.6.y 0a40c6fbd105 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/28 15:53 linux-6.6.y 0a40c6fbd105 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/27 16:46 linux-6.6.y 0a40c6fbd105 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/23 05:27 linux-6.6.y eac8889a3a1c c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/20 15:15 linux-6.6.y eac8889a3a1c 62fb93a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/19 14:36 linux-6.6.y eac8889a3a1c 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/13 01:05 linux-6.6.y 3b9f64db0496 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/08 12:14 linux-6.6.y 3b9f64db0496 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/05/05 14:55 linux-6.6.y 258cf62a6dfd 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/29 01:22 linux-6.6.y 142cd8382222 95008c03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/28 15:02 linux-6.6.y 142cd8382222 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/17 19:43 linux-6.6.y 8cee53b8eaeb 24ecfc1e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/16 20:53 linux-6.6.y 8cee53b8eaeb 4743f87d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/14 05:21 linux-6.6.y 8cee53b8eaeb 1a086e7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/04/12 06:33 linux-6.6.y 8cee53b8eaeb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2025/08/04 22:08 linux-6.6.y 3a8ababb8b6a f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
* Struck through repros no longer work on HEAD.