mainline inclusion
from mainline-5.2-rc1
commit ce285c26
category: bugfix
bugzilla: 14537
CVE: NA

---------------------------

autofs_d_release() can overlap with lockless ->d_manage(),
ending up with autofs_dentry_ino() freed under the latter.
Make freeing autofs_info instances RCU-delayed...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Nzhengbin <zhengbin13@huawei.com>
Reviewed-by: Nzhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>