md bitmap

The md bitmap tag covers discussions about the Linux kernel's md/md-bitmap subsystem, which implements write-intent bitmaps for software RAID. Content focuses on a specific arithmetic bug tracked as CVE-2025-22124 that can cause clustermd nodes to hang due to an unwritten first superblock page. The fix has been applied to upstream stable kernels, and operators are advised to treat this as a medium-severity availability issue requiring prompt patching. Topics include kernel stability, RAID management, and security updates related to the md-bitmap component.