syzbot has bisected this issue to:
commit e9e006f5fcf2bab59149cb38a48a4817c1b538b4
Author: Mike Christie <mchristi@xxxxxxxxxx>
Date: Sun Aug 4 19:10:06 2019 +0000
nbd: fix max number of supported devs
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=154dc192500000
start commit: 4e78c578 Add linux-next specific files for 20201030
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=174dc192500000
console output: https://syzkaller.appspot.com/x/log.txt?x=134dc192500000
kernel config: https://syzkaller.appspot.com/x/.config?x=83318758268dc331
dashboard link: https://syzkaller.appspot.com/bug?extid=69a90a5e8f6b59086b2a
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e051a8500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bf75b8500000
Reported-by: syzbot+69a90a5e8f6b59086b2a@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e9e006f5fcf2 ("nbd: fix max number of supported devs")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
