Re: possible deadlock in free_ioctx_users (2)

[syzbot]

syzbot has bisected this bug to:

commit 7bc3e6e55acf065500a24621f3b313e7e5998acf
Author: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Date:   Thu Feb 20 00:22:26 2020 +0000

    proc: Use a list of inodes to flush from proc

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=164ae51fe00000
start commit:   7be97138 Merge tag 'xfs-5.7-merge-8' of git://git.kernel.o..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=154ae51fe00000
console output: https://syzkaller.appspot.com/x/log.txt?x=114ae51fe00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ec722f9d4eb221d2
dashboard link: https://syzkaller.appspot.com/bug?extid=832aabf700bc3ec920b9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10f37663e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16feb91fe00000

Reported-by: syzbot+832aabf700bc3ec920b9@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 7bc3e6e55acf ("proc: Use a list of inodes to flush from proc")

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