Re: [syzbot] [ext4?] general protection fault in ep_poll_callback

[syzbot]

syzbot has bisected this issue to:

commit a0b0fd53e1e67639b303b15939b9c653dbe7a8c4
Author: Bart Van Assche <bvanassche@xxxxxxx>
Date:   Thu Feb 14 23:00:46 2019 +0000

    locking/lockdep: Free lock classes that are no longer in use

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16c0c84ea80000
start commit:   bfa3037d8280 Merge tag 'fuse-update-6.5' of git://git.kern..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15c0c84ea80000
console output: https://syzkaller.appspot.com/x/log.txt?x=11c0c84ea80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=27e33fd2346a54b
dashboard link: https://syzkaller.appspot.com/bug?extid=c2b68bdf76e442836443
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=111c904ea80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=116b0faaa80000

Reported-by: syzbot+c2b68bdf76e442836443@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a0b0fd53e1e6 ("locking/lockdep: Free lock classes that are no longer in use")

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