Merge tag 'pull-namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull namespace fix from Al Viro:
 "Fix weird corner case in copy_mnt_ns()"

* tag 'pull-namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  copy_mnt_ns(): handle a corner case (overmounted mntns bindings) saner