Commits
Eric W. Biederman committed 97c1df3e54e
mnt: If fs_fully_visible fails call put_filesystem.
Add this trivial missing error handling.
Cc: stable@vger.kernel.org
Fixes: 1b852bceb0d1 ("mnt: Refactor the logic for mounting sysfs and proc in a user namespace")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>