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

Pull mount fixes from Al Viro:
 "Fixes for several recent mount-related regressions"

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  change_mnt_propagation(): calculate propagation source only if we'll need it
  use uniform permission checks for all mount propagation changes
  propagate_umount(): only surviving overmounts should be reparented
  fix the softlockups in attach_recursive_mnt()