dm mirror log: round up region bitmap size to BITSPERLONG
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.49 by commit 0d2209b54f1de0c2f99cab246d4cf2cfe24aaaa9, it was introduced in version v2.6.18 by commit 29121bd0b00ebb9524971a583fea4a2f7afe8041. For more details please see the references link.