------------[ cut here ]------------
WARNING: CPU: 0 PID: 1104 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525 [inline]
WARNING: CPU: 0 PID: 1104 at kernel/kthread.c:525 __kthread_bind kernel/kthread.c:538 [inline]
WARNING: CPU: 0 PID: 1104 at kernel/kthread.c:525 kthread_unpark+0x16b/0x210 kernel/kthread.c:631
Modules linked in:

CPU: 0 PID: 1104 Comm: kworker/u8:6 Not tainted 6.9.0-next-20240521-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: netns cleanup_net

RIP: 0010:__kthread_bind_mask kernel/kthread.c:525 [inline]
RIP: 0010:__kthread_bind kernel/kthread.c:538 [inline]
RIP: 0010:kthread_unpark+0x16b/0x210 kernel/kthread.c:631
Code: 00 fc ff df 41 0f b6 04 06 84 c0 0f 85 93 00 00 00 41 80 4d 03 04 4c 89 e7 48 8b 34 24 e8 4d 5e 33 0a eb 09 e8 96 9f 33 00 90 <0f> 0b 90 48 89 ef be 08 00 00 00 e8 85 86 99 00 f0 80 65 00 fb 4c
RSP: 0018:ffffc90004b0f758 EFLAGS: 00010293

RAX: ffffffff8162c61a RBX: 0000000000000000 RCX: ffff888022731e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888066fb3c00 R08: ffffffff8162c5a7 R09: 1ffffffff25f70cd
R10: dffffc0000000000 R11: fffffbfff25f70ce R12: 0000000000000001
R13: ffff8880706e5a2c R14: 1ffff1100e0dcb45 R15: ffff8880706e5a00
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a04cd5000 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000006800
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kthread_stop+0x17a/0x630 kernel/kthread.c:707
 destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5829
 wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257
 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10692
 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11760
 ops_exit_list net/core/net_namespace.c:178 [inline]
 cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>