------------[ cut here ]------------
debug_locks && !(lock_is_held(&(&wiphy->mtx)->dep_map) != 0)
WARNING: net/wireless/core.c:1957 at wiphy_delayed_work_cancel+0x9a/0xb0 net/wireless/core.c:1957, CPU#3: kworker/u32:0/12
Modules linked in:
CPU: 3 UID: 0 PID: 12 Comm: kworker/u32:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:wiphy_delayed_work_cancel+0x9a/0xb0 net/wireless/core.c:1957
Code: e8 bb a8 fa f6 48 8d 7d 60 be ff ff ff ff e8 ed 85 b6 00 31 ff 41 89 c4 89 c6 e8 11 a3 fa f6 45 85 e4 75 bf e8 97 a8 fa f6 90 <0f> 0b 90 eb b4 48 c7 c7 84 8a 43 91 e8 45 7c 6d f7 eb 90 0f 1f 00
RSP: 0018:ffffc900000f7740 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802b5e18a8 RCX: 0000000000000000
RDX: ffff88801ee9cb00 RSI: ffffffff8b105939 RDI: ffff88801ee9cb00
RBP: ffff888103680740 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888103680f40 R15: ffff888103680f90
FS:  0000000000000000(0000) GS:ffff8880d5ea2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055979cdf8da8 CR3: 000000003e9c7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ieee80211_free_keys+0xcd/0x640 net/mac80211/key.c:1148
 ieee80211_teardown_sdata+0x54/0x250 net/mac80211/iface.c:906
 unregister_netdevice_many_notify+0x1407/0x2150 net/core/dev.c:12537
 unregister_netdevice_many net/core/dev.c:12589 [inline]
 default_device_exit_batch+0x907/0xbd0 net/core/dev.c:13288
 ops_exit_list net/core/net_namespace.c:206 [inline]
 ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
 cleanup_net+0x499/0x920 net/core/net_namespace.c:706
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
 process_scheduled_works kernel/workqueue.c:3470 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>