Re: kernel BUG at lib/string.c:LINE! (5)

[syzbot]

syzbot has bisected this issue to:

commit 3951e7f050ac6a38bbc859fc3cd6093890c31d1c
Author: Johannes Thumshirn <jthumshirn@xxxxxxx>
Date:   Mon Oct 7 09:11:01 2019 +0000

    btrfs: add xxhash64 to checksumming algorithms

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10aadcc5900000
start commit:   e4c26faa Merge tag 'usb-5.9-rc5' of git://git.kernel.org/p..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12aadcc5900000
console output: https://syzkaller.appspot.com/x/log.txt?x=14aadcc5900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c61610091f4ca8c4
dashboard link: https://syzkaller.appspot.com/bug?extid=e864a35d361e1d4e29a5
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=177582be900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13deb2b5900000

Reported-by: syzbot+e864a35d361e1d4e29a5@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 3951e7f050ac ("btrfs: add xxhash64 to checksumming algorithms")

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