syzbot has bisected this issue to:
commit f08e3888574d490b31481eef6d84c61bedba7a47
Author: Boqun Feng <boqun.feng@xxxxxxxxx>
Date: Fri Aug 7 07:42:30 2020 +0000
lockdep: Fix recursive read lock related safe->unsafe detection
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13034be1900000
start commit: dff9f829 Add linux-next specific files for 20200908
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=10834be1900000
console output: https://syzkaller.appspot.com/x/log.txt?x=17034be1900000
kernel config: https://syzkaller.appspot.com/x/.config?x=37b3426c77bda44c
dashboard link: https://syzkaller.appspot.com/bug?extid=22e87cdf94021b984aa6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108b740d900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12daa9ed900000
Reported-by: syzbot+22e87cdf94021b984aa6@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: f08e3888574d ("lockdep: Fix recursive read lock related safe->unsafe detection")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
