Comment 15 for bug 657900

I don't use libpam-mount but 'man 5 pam_mount.conf' tells me that it can call mount.cifs as root (ie. implicit sudo), even defaults to this. You don't need to have your mount points in /etc/fstab if you are root, so you should be fine. If libpam-mount is indeed broken by this change, you should file a bug against libpam-mount.