------------[ cut here ]------------
WARNING: CPU: 2 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask+0x35/0xc0 kernel/kthread.c:525
Modules linked in:
CPU: 2 UID: 0 PID: 11 Comm: kworker/u32:0 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:__kthread_bind_mask+0x35/0xc0 kernel/kthread.c:525
Code: 48 89 fb e8 1d 56 33 00 89 ee 48 89 df e8 f3 51 04 00 31 ff 48 89 c5 48 89 c6 e8 76 58 33 00 48 85 ed 75 14 e8 fc 55 33 00 90 <0f> 0b 90 5b 5d 41 5c 41 5d e9 ed 55 33 00 e8 e8 55 33 00 4c 8d ab
RSP: 0018:ffffc900000e7868 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805d0ac880 RCX: ffffffff81586a4a
RDX: ffff88801d2a2440 RSI: ffffffff81586a54 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8b4b56a8
R13: 0000000000000001 R14: ffff88802434ccc0 R15: ffff888058cdd4e0
FS:  0000000000000000(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f41ad0c55d6 CR3: 000000000db7c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __kthread_bind kernel/kthread.c:538 [inline]
 kthread_unpark+0x147/0x1a0 kernel/kthread.c:631
 kthread_stop+0x177/0x660 kernel/kthread.c:707
 destroy_workqueue+0x154/0xaa0 kernel/workqueue.c:5797
 wg_destruct+0x24d/0x3d0 drivers/net/wireguard/device.c:257
 netdev_run_todo+0x760/0x12d0 net/core/dev.c:10762
 default_device_exit_batch+0x860/0xae0 net/core/dev.c:11898
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:178
 cleanup_net+0x5b7/0xbb0 net/core/net_namespace.c:640
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>