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WARNING in ieee80211_link_release_channel

Status: upstream: reported on 2025/08/02 09:20
Reported-by: syzbot+15b80e0eb09fd5403e49@syzkaller.appspotmail.com
First crash: 20d, last: 22h33m
▶ ▼ 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 679d 719d 0/29 auto-obsoleted due to no activity on 2024/01/21 00:13
linux-6.6 WARNING in ieee80211_link_release_channel -1 11 2d23h 17d 0/2 upstream: reported on 2025/08/04 22:09

Sample crash report:
bond0: (slave wlan1): Releasing backup interface
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11 at net/mac80211/chan.c:2016 ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2016
Modules linked in:
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2016
Code: 7c 2d 00 00 74 08 48 89 df e8 1c 81 30 f8 bf 18 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c5 e6 7e 00 e8 60 64 e0 f7 <0f> 0b eb c5 48 c7 c1 64 89 1f 8e 80 e1 07 80 c1 03 38 c1 0f 8c 51
RSP: 0018:ffffc900001076e8 EFLAGS: 00010293
RAX: ffffffff89a05a00 RBX: ffff888079b515a8 RCX: ffff88813fe83b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ea96
R10: fffffbfff1c3ea96 R11: 1ffffffff1c3ea95 R12: ffff888079b52ae0
R13: 1ffff1100f36a2b5 R14: ffff888079b52258 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0dffa53adc CR3: 0000000068281000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unregister_netdevice_many+0x12ab/0x1840 net/core/dev.c:10995
 ieee80211_remove_interfaces+0x429/0x6d0 net/mac80211/iface.c:2382
 ieee80211_unregister_hw+0x59/0x290 net/mac80211/main.c:1478
 mac80211_hwsim_del_radio+0x270/0x450 drivers/net/wireless/mac80211_hwsim.c:4688
 hwsim_exit_net+0x581/0x640 drivers/net/wireless/mac80211_hwsim.c:5475
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x6f0/0xb80 net/core/net_namespace.c:640
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 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 (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/21 20:15 linux-6.1.y 0bc96de781b4 3e79b825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/12 22:36 linux-6.1.y 3594f306da12 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/11 23:27 linux-6.1.y 3594f306da12 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/11 23:24 linux-6.1.y 3594f306da12 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/08 20:13 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/08 20:12 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/08 06:19 linux-6.1.y 3594f306da12 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/07 05:12 linux-6.1.y 3594f306da12 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/07 04:47 linux-6.1.y 3594f306da12 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/06 05:19 linux-6.1.y 3594f306da12 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_link_release_channel
2025/08/04 22:44 linux-6.1.y 3594f306da12 f5bcc8dc .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
2025/08/14 19:51 linux-6.1.y 3594f306da12 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2025/08/12 00:19 linux-6.1.y 3594f306da12 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2025/08/10 08:13 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2025/08/07 17:54 linux-6.1.y 3594f306da12 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_link_release_channel
2025/08/05 07:05 linux-6.1.y 3594f306da12 f5bcc8dc .config console log report info [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.