Description: debugfs_remove use-after-free
References:
 https://bugzilla.kernel.org/show_bug.cgi?id=205713
 https://syzkaller.appspot.com/bug?extid=903b72a010ad6b7a40f2
 https://lore.kernel.org/lkml/20200206111052.45356-1-yukuai3@huawei.com/
Notes:
Bugs:
upstream:
4.19-upstream-stable:
4.9-upstream-stable:
3.16-upstream-stable:
sid:
4.19-buster-security:
4.9-stretch-security:
3.16-jessie-security: