syzbot


WARNING in ieee80211_teardown_sdata

Status: upstream: reported on 2025/08/05 19:48
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+04851834dc894437cf21@syzkaller.appspotmail.com
First crash: 21d, last: 21d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireless?] WARNING in ieee80211_teardown_sdata 0 (1) 2025/08/05 19:48

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1161 at net/mac80211/iface.c:848 ieee80211_teardown_sdata+0xd2/0x140 net/mac80211/iface.c:848
Modules linked in:
CPU: 0 UID: 0 PID: 1161 Comm: kworker/u8:8 Not tainted 6.16.0-syzkaller-10499-g89748acdf226 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_teardown_sdata+0xd2/0x140 net/mac80211/iface.c:848
Code: f6 48 89 df 31 f6 31 d2 e8 db 99 00 00 48 81 c3 80 17 00 00 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 54 ba 00 00 e8 bf b6 d6 f6 90 <0f> 0b 90 4c 8d bb a0 09 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00
RSP: 0018:ffffc900040df390 EFLAGS: 00010293
RAX: ffffffff8ae8cce1 RBX: ffff888038ab8d80 RCX: ffff888027048000
RDX: 0000000000000000 RSI: 00000000ffffff9f RDI: ffff888038ab8d80
RBP: ffffc900040df530 R08: ffffffff8fa1ba37 R09: 1ffffffff1f43746
R10: dffffc0000000000 R11: ffffffff8ae92c70 R12: dffffc0000000000
R13: ffff888038ab8c10 R14: ffff888038ab9978 R15: ffff888038ab8000
FS:  0000000000000000(0000) GS:ffff888125c5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa038adcf98 CR3: 000000003edb8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x1953/0x1ff0 net/core/dev.c:12177
 unregister_netdevice_many net/core/dev.c:12219 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12063
 unregister_netdevice include/linux/netdevice.h:3382 [inline]
 _cfg80211_unregister_wdev+0x165/0x590 net/wireless/core.c:1275
 ieee80211_remove_interfaces+0x49a/0x6d0 net/mac80211/iface.c:2391
 ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1664
 mac80211_hwsim_del_radio+0x275/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5674
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6554
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/01 19:44 upstream 89748acdf226 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ieee80211_teardown_sdata
* Struck through repros no longer work on HEAD.