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=171556f0500000
start commit: fb0155a0 Merge tag 'nfs-for-5.9-3' of git://git.linux-nfs...
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=149556f0500000
console output: https://syzkaller.appspot.com/x/log.txt?x=109556f0500000
kernel config: https://syzkaller.appspot.com/x/.config?x=41b736b7ce1b3ea4
dashboard link: https://syzkaller.appspot.com/bug?extid=fe03c50d25c0188f7487
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=173d9b17900000
Reported-by: syzbot+fe03c50d25c0188f7487@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e9e006f5fcf2 ("nbd: fix max number of supported devs")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
