Hi,
see http://bugzilla.opensuse.org/show_bug.cgi?id=945563 for the background or add
/etc/samba/sock/ rw, /etc/samba/sock/* w,
to /etc/apparmor.d/abstractions/samba if you're using one of Samba's nmb, smb, or winbind daemons while having AppArmor active.
Cheers,
Lars