[syzbot] [wireguard?] WARNING in __kthread_bind_mask (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3cdb45594619 Merge tag 's390-6.9-4' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12c9866f180000
kernel config: https://syzkaller.appspot.com/x/.config?x=85dbe39cf8e4f599
dashboard link: https://syzkaller.appspot.com/bug?extid=36466e0ea21862240631
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/04e2e4bee9fb/disk-3cdb4559.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/65456769dc43/vmlinux-3cdb4559.xz
kernel image: https://storage.googleapis.com/syzbot-assets/09504bbdec9e/bzImage-3cdb4559.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+36466e...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 54 at kernel/kthread.c:524 __kthread_bind_mask+0x35/0xc0 kernel/kthread.c:524
Modules linked in:
CPU: 1 PID: 54 Comm: kworker/u8:4 Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: netns cleanup_net
RIP: 0010:__kthread_bind_mask+0x35/0xc0 kernel/kthread.c:524
Code: 48 89 fb e8 8d 52 33 00 89 ee 48 89 df e8 d3 94 04 00 31 ff 48 89 c5 48 89 c6 e8 86 4d 33 00 48 85 ed 75 14 e8 6c 52 33 00 90 <0f> 0b 90 5b 5d 41 5c 41 5d e9 5d 52 33 00 e8 58 52 33 00 4c 8d ab
RSP: 0018:ffffc90000bf7870 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888060bfbc00 RCX: ffffffff815a6fda
RDX: ffff88801c690000 RSI: ffffffff815a6fe4 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000005 R12: ffffffff8b0b2f08
R13: 0000000000000001 R14: ffff88805e2c0ca0 R15: ffff88801fde54c0
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0039d0000 CR3: 000000002eb24000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__kthread_bind kernel/kthread.c:537 [inline]
kthread_unpark+0x147/0x1a0 kernel/kthread.c:630
kthread_stop+0x177/0x670 kernel/kthread.c:706
destroy_workqueue+0x154/0xaa0 kernel/workqueue.c:5685
wg_destruct+0x24d/0x3d0 drivers/net/wireguard/device.c:257
netdev_run_todo+0x775/0x1260 net/core/dev.c:10593
default_device_exit_batch+0x860/0xae0 net/core/dev.c:11641
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
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>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup