Merge tag 'md-fixes-2023-03-29' of...

Merge tag 'md-fixes-2023-03-29' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-6.3

Pull MD fix from Song.

* tag 'md-fixes-2023-03-29' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md: fix regression for null-ptr-deference in __md_stop()