Re: [syzbot] WARNING in mntput_no_expire (2)

[syzbot]

syzbot has bisected this issue to:

commit 73d90386b559d6f4c3c5db5e6bb1b68aae8fd3e7
Author: Damien Le Moal <damien.lemoal@xxxxxxx>
Date:   Thu Jan 28 04:47:27 2021 +0000

    nvme: cleanup zone information initialization

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1440e986d00000
start commit:   d19cc4bf Merge tag 'trace-v5.12-rc5' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1640e986d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1240e986d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d1a3d65a48dbd1bc
dashboard link: https://syzkaller.appspot.com/bug?extid=c88a7030da47945a3cc3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12f50d11d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=137694a1d00000

Reported-by: syzbot+c88a7030da47945a3cc3@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 73d90386b559 ("nvme: cleanup zone information initialization")

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