Re: WARNING in kthread_queue_work

[syzbot]

syzbot has bisected this issue to:

commit 4977caef05aa154f5e45a232fc4f0e1c74a0c739
Author: Zhang Qiang <qiang.zhang@xxxxxxxxxxxxx>
Date:   Tue Jul 7 02:29:47 2020 +0000

    kthread: work could not be queued when worker being destroyed

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12c58f57100000
start commit:   89032636 Add linux-next specific files for 20200708
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11c58f57100000
console output: https://syzkaller.appspot.com/x/log.txt?x=16c58f57100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=64a250ebabc6c320
dashboard link: https://syzkaller.appspot.com/bug?extid=fa64e680a1ff32087778
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16bf9f2f100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=118380ed100000

Reported-by: syzbot+fa64e680a1ff32087778@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 4977caef05aa ("kthread: work could not be queued when worker being destroyed")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection