Re: general protection fault in _vm_normal_page

[syzbot]

syzbot has bisected this bug to:

commit 4a110365f1da9d5cabbd0a01796027c0a6d5e80b
Author: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Date:   Wed Jul 11 00:45:42 2018 +0000

    mm: drop unneeded ->vm_ops checks

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10b0650f200000
start commit:   98be4506 Add linux-next specific files for 20180711
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=12b0650f200000
console output: https://syzkaller.appspot.com/x/log.txt?x=14b0650f200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3f3b3673fec35d01
dashboard link: https://syzkaller.appspot.com/bug?extid=120abb1c3f7bfdc523f7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12a46568400000

Reported-by: syzbot+120abb1c3f7bfdc523f7@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 4a110365f1da ("mm: drop unneeded ->vm_ops checks")

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