WARNING in ieee80211_link_release_channel

Status: upstream: reported C repro on 2025/08/02 09:20
Reported-by: syzbot+15b80e0eb09fd5403e49@syzkaller.appspotmail.com
First crash: 412d, last: 5h48m
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/09/03 upstream (ToT) 940de590b839 C Didn't crash
▶ ▼ 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 1071d 1111d 0/29 auto-obsoleted due to no activity on 2024/01/21 00:13
linux-6.6 WARNING in ieee80211_link_release_channel -1 131 6h07m 409d 0/2 upstream: reported on 2025/08/04 22:09

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6250 at net/mac80211/chan.c:2017 ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017
Modules linked in:
CPU: 1 PID: 6250 Comm: kworker/u4:13 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017
Code: 7c 2d 00 00 74 08 48 89 df e8 0c 17 19 f8 bf 18 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 15 19 81 00 e8 30 d2 c7 f7 <0f> 0b eb c5 48 c7 c1 24 e9 20 8e 80 e1 07 80 c1 03 38 c1 0f 8c 51
RSP: 0018:ffffc90005e476e8 EFLAGS: 00010293
RAX: ffffffff89ba60b0 RBX: ffff8880538815a8 RCX: ffff88802f3f8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8e20b46f R09: 1ffffffff1c4168d
R10: dffffc0000000000 R11: fffffbfff1c4168e R12: ffff888053882ab0
R13: 1ffff1100a7102b5 R14: ffff888053882228 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558926a74660 CR3: 0000000062c14000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x13c4/0x1990 net/core/dev.c:11041
 ieee80211_remove_interfaces+0x44b/0x700 net/mac80211/iface.c:2396
 ieee80211_unregister_hw+0x59/0x290 net/mac80211/main.c:1484
 mac80211_hwsim_del_radio+0x285/0x480 drivers/net/wireless/mac80211_hwsim.c:4688
 hwsim_exit_net+0x589/0x650 drivers/net/wireless/mac80211_hwsim.c:5475
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x703/0xba0 net/core/net_namespace.c:640
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (189):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/18 10:16 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/17 20:13 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/16 09:06 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/16 07:32 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/15 18:21 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/14 17:44 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/14 10:48 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/12 00:06 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/11 20:16 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/10 14:47 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/09 21:21 linux-6.1.y cf82dcca9634 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/08 19:21 linux-6.1.y cf82dcca9634 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/07 16:16 linux-6.1.y cf82dcca9634 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/05 02:23 linux-6.1.y cf82dcca9634 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/04 13:46 linux-6.1.y cf82dcca9634 f65209a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/03 13:32 linux-6.1.y cf82dcca9634 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/03 09:09 linux-6.1.y cf82dcca9634 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/01 14:45 linux-6.1.y d64a499eea6b 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/29 00:55 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/28 15:50 linux-6.1.y d64a499eea6b e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/25 16:04 linux-6.1.y 05208478041c a9a1fc32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/25 03:36 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/25 03:16 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/20 19:58 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/19 21:07 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/15 03:23 linux-6.1.y e4f7d8be268e 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/13 23:24 linux-6.1.y e4f7d8be268e b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/12 05:25 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/10 22:38 linux-6.1.y e4f7d8be268e 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/08 08:00 linux-6.1.y e4f7d8be268e 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/07 18:01 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/08/07 00:30 linux-6.1.y 03f3a99e8e93 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/02 09:19 linux-6.1.y 3594f306da12 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2026/09/18 12:08 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/18 05:08 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/17 21:49 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/17 03:42 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/16 17:35 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/15 06:59 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/14 22:33 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/11 18:10 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/09/11 18:10 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/08/29 12:07 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/08/19 12:27 linux-6.1.y e4f7d8be268e 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/08/18 03:35 linux-6.1.y e4f7d8be268e 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/08/12 23:21 linux-6.1.y e4f7d8be268e 359b2492 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/08/07 21:12 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2026/03/26 09:07 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
* Struck through repros no longer work on HEAD.