Description: dm verity: set DM_TARGET_IMMUTABLE feature flag
References:
 https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-w63m
Notes:
Bugs:
upstream: released (5.19-rc1) [4caae58406f8ceb741603eee460d79bacca9b1b5]
5.10-upstream-stable: released (5.10.120) [8df42bcd364cc3b41105215d841792aea787b133]
4.19-upstream-stable: released (4.19.246) [6bff6107d1364c95109609c3fd680e6c8d7fa503]
sid: released (5.18.2-1)
5.10-bullseye-security: released (5.10.120-1)
4.19-buster-security: released (4.19.249-1)