syzbot has bisected this bug to: commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Date: Sun Jul 2 23:07:02 2017 +0000 Linux 4.12 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e319df200000 start commit: 28e8c4bc Merge tag 'rtc-4.21' of git://git.kernel.org/pub/.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=c2ab9708c613a224 dashboard link: https://syzkaller.appspot.com/bug?extid=5dd1f9327a9ee760048c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d17880c00000 Reported-by: syzbot+5dd1f9327a9ee760048c@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 6f7da290413b ("Linux 4.12") For information about bisection process see: https://goo.gl/tpsmEJ#bisection