netdev - [syzbot] [wireguard?] WARNING in kthread

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Message-ID: <00000000000061c0a106183499ec@google.com>
Date: Sat, 11 May 2024 14:47:30 -0700
From: syzbot <syzbot+943d34fa3cf2191e3068@...kaller.appspotmail.com>
To: Jason@...c4.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com, wireguard@...ts.zx2c4.com
Subject: [syzbot] [wireguard?] WARNING in kthread_unpark (2)

Hello,

syzbot found the following issue on:

HEAD commit:    75fa778d74b7 Add linux-next specific files for 20240510
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13d483c0980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ccdd3ebd6715749a
dashboard link: https://syzkaller.appspot.com/bug?extid=943d34fa3cf2191e3068
compiler:       Debian clang version 15.0.6, 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/ad9391835bcf/disk-75fa778d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d827b3da9a26/vmlinux-75fa778d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8f32f0182388/bzImage-75fa778d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+943d34fa3cf2191e3068@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525 [inline]
WARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind kernel/kthread.c:538 [inline]
WARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 kthread_unpark+0x16b/0x210 kernel/kthread.c:631
Modules linked in:

CPU: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.9.0-rc7-next-20240510-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 bd c5 32 0a eb 09 e8 46 88 33 00 90 <0f> 0b 90 48 89 ef be 08 00 00 00 e8 75 43 99 00 f0 80 65 00 fb 4c
RSP: 0018:ffffc90000107758 EFLAGS: 00010293

RAX: ffffffff8162943a RBX: 0000000000000000 RCX: ffff8880172c3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802e430800 R08: ffffffff816293c7 R09: 1ffffffff25f64cd
R10: dffffc0000000000 R11: fffffbfff25f64ce R12: 0000000000000001
R13: ffff8880296eda2c R14: 1ffff110052ddb45 R15: ffff8880296eda00
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd40918ff8 CR3: 000000002e664000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kthread_stop+0x17a/0x630 kernel/kthread.c:707
 destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810
 wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257
 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693
 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769
 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:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 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>


---
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