syzbot has bisected this issue to:
commit 0f818c4bc1f3dc0d6d0ea916e0ab30cf5e75f4c0
Author: Axel Rasmussen <axelrasmus...@google.com>
Date: Tue Nov 24 05:37:42 2020 +0000
mm: mmap_lock: add tracepoints around lock acquisition
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1626291d500000
start commit: 6174f052 Add linux-next specific files for 20201127
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=1526291d500000
console output: https://syzkaller.appspot.com/x/log.txt?x=1126291d500000
kernel config: https://syzkaller.appspot.com/x/.config?x=79c69cf2521bef9c
dashboard link: https://syzkaller.appspot.com/bug?extid=19e6dd9943972fa1c58a
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c3351d500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c28809500000
Reported-by: syzbot+19e6dd9943972fa1c...@syzkaller.appspotmail.com
Fixes: 0f818c4bc1f3 ("mm: mmap_lock: add tracepoints around lock acquisition")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
