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

Pull mount propagation fix from Al Viro:
 "6.15 allowed mount propagation to destinations in detached trees;
  unfortunately, that breaks existing userland, so the old behaviour
  needs to be restored.

  It's not exactly a revert - the original behaviour had a bug, where
  existence of detached tree might disrupt propagation between locations
  not in detached trees. Thankfully, userland did not depend upon that
  bug, so we want to keep the fix"

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  Don't propagate mounts into detached trees