device mapper fixes for 5.13-rc4

Hi Linus,

The following changes since commit c4681547bcce777daf576925a966ffa824edd09d:

Linux 5.13-rc3 (2021-05-23 11:42:48 -1000)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/for-5.13/dm-fixes-2

for you to fetch changes up to 7e768532b2396bcb7fbf6f82384b85c0f1d2f197:

dm snapshot: properly fix a crash when an origin has no snapshots (2021-05-25 16:19:58 -0400)

Please pull, thanks.
Mike

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- Fix DM verity target's 'require_signatures' module_param permissions.

- Revert DM snapshot fix from v5.13-rc3 and then properly fix crash when an origin has no snapshots. This allows only the proper fix to go to stable@ (since the original fix was successfully dropped).

----------------------------------------------------------------
John Keeping (1):
dm verity: fix require_signatures module_param permissions

Mikulas Patocka (2):
dm snapshot: revert "fix a crash when an origin has no snapshots" dm snapshot: properly fix a crash when an origin has no snapshots

 drivers/md/dm-snap.c              | 3 ++-
 drivers/md/dm-verity-verify-sig.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)