Re: WARNING in request_end

[syzbot]

syzbot has bisected this bug to:

commit 4ad769f3c346ec3d458e255548dec26ca5284cf6
Author: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Date:   Tue May 29 14:04:46 2018 +0000

    fuse: Allow fully unprivileged mounts

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16b4518b200000
start commit:   0238df64 Linux 4.19-rc7
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=15b4518b200000
console output: https://syzkaller.appspot.com/x/log.txt?x=11b4518b200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=88e9a8a39dc0be2d
dashboard link: https://syzkaller.appspot.com/bug?extid=ef054c4d3f64cd7f7cec
userspace arch: i386
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=119bf2e6400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1760f806400000

Reported-by: syzbot+ef054c4d3f64cd7f7cec@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 4ad769f3c346 ("fuse: Allow fully unprivileged mounts")

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