Re: possible deadlock in mnt_want_write

[syzbot]

syzbot suspects this issue was fixed by commit:

commit 146d62e5a5867fbf84490d82455718bfb10fe824
Author: Amir Goldstein <amir73il@xxxxxxxxx>
Date:   Thu Apr 18 14:42:08 2019 +0000

    ovl: detect overlapping layers

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11e40184500000
start commit:   6d906f99 Merge tag 'arm64-fixes' of git://git.kernel.org/p..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=856fc6d0fbbeede9
dashboard link: https://syzkaller.appspot.com/bug?extid=ae82084b07d0297e566b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=111767b7200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1611ab2d200000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: ovl: detect overlapping layers

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