WARNING in ieee80211_link_release_channel

Status: upstream: reported on 2025/08/04 22:09
Reported-by: syzbot+47350a473be99ab8cff7@syzkaller.appspotmail.com
First crash: 465d, last: 15h30m
▶ ▼ 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 1127d 1167d 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 309 4h06m 468d 0/3 upstream: reported C repro on 2025/08/02 09:20

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at net/mac80211/chan.c:2043 ieee80211_link_release_channel+0x154/0x180 net/mac80211/chan.c:2043
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 11/06/2026
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_link_release_channel+0x154/0x180 net/mac80211/chan.c:2043
Code: 7c 2d 00 00 74 08 48 89 df e8 d8 e1 c6 f7 bf 60 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 31 77 86 00 e8 0c d9 6d f7 <0f> 0b eb c5 48 c7 c1 3c 0f 8e 8f 80 e1 07 80 c1 03 38 c1 0f 8c 51
RSP: 0018:ffffc90000117568 EFLAGS: 00010293
RAX: ffffffff8a1a0594 RBX: ffff88805b2f55f8 RCX: ffff88801da5da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f8dda6f R09: 1ffffffff1f1bb4d
R10: dffffc0000000000 R11: fffffbfff1f1bb4e R12: ffff88805b2f6c68
R13: 1ffff1100b65eabf R14: ffff88805b2f6420 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdc3823000 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x1357/0x1910 net/core/dev.c:11245
 unregister_netdevice_many net/core/dev.c:11281 [inline]
 unregister_netdevice_queue+0x2e9/0x330 net/core/dev.c:11161
 unregister_netdevice include/linux/netdevice.h:3198 [inline]
 _cfg80211_unregister_wdev+0x16c/0x5a0 net/wireless/core.c:1245
 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 (171):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/11/12 22:17 linux-6.6.y 5139929c698c c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/11/11 21:55 linux-6.6.y 5139929c698c e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/11/07 16:09 linux-6.6.y 5139929c698c 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/11/03 02:47 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/31 18:17 linux-6.6.y b5a1dc3ad482 2041d3f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/30 20:32 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/30 06:40 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/30 01:45 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/29 21:20 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/29 15:16 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/28 14:21 linux-6.6.y 0aebf2870d53 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/20 16:33 linux-6.6.y cecd39af8a1a df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/18 11:17 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/15 16:45 linux-6.6.y cecd39af8a1a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
2026/10/14 02:44 linux-6.6.y a91a6aa9253c 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_link_release_channel
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
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.