syzbot suspects this bug was fixed by commit:
commit e7c58097793ef15d58fadf190ee58738fbf447cd
Author: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Date: Tue Jan 8 23:23:32 2019 +0000
hugetlbfs: revert "Use i_mmap_rwsem to fix page fault/truncate race"
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14ec0d2c600000
start commit: ca9eb48f Merge tag 'regulator-v5.0' of git://git.kernel.or..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=963b24abf3f7c2d8
dashboard link: https://syzkaller.appspot.com/bug?extid=a50c7541a4a55cd49b02
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12097f03400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b55ac5400000
If the result looks correct, please mark the bug fixed by replying with:
#syz fix: hugetlbfs: revert "Use i_mmap_rwsem to fix page fault/truncate
race"
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
