syzbot suspects this bug was fixed by commit:
commit 810507fe6fd5ff3de429121adff49523fabb643a
Author: Waiman Long <longman@xxxxxxxxxx>
Date: Thu Feb 6 15:24:08 2020 +0000
locking/lockdep: Reuse freed chain_hlocks entries
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1008138be00000
start commit: 72825454 Merge branch 'x86-urgent-for-linus' of git://git...
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=9a31528e58cc12e2
dashboard link: https://syzkaller.appspot.com/bug?extid=38f5d5cf7ae88c46b11a
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a6c439a00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1353c323a00000
If the result looks correct, please mark the bug fixed by replying with:
#syz fix: locking/lockdep: Reuse freed chain_hlocks entries
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
