Red Hat Enterprise Linux 7.6+ is exposed to corruption where LVM might cause data corruption in the first 128kB of the LVM volume
Issue
- A release note has also been written but this article serves to alert customers upgrading to Red Hat Enterprise Linux 7.6 of an urgent issue noted with LVM and possible user data sector overwrites.
- LVM might cause data corruption in the first 128kB of allocatable space of a physical volume
- A bug in the I/O layer of LVM causes LVM to read and write back the first 128kB of data that immediately follows the LVM metadata on the disk. If another program or the file system is modifying these blocks when you use an LVM command, changes might be lost. As a consequence, this might lead to data corruption in rare cases.
Environment
- Red Hat Enterprise Linux 7.6+ (RHEL)
lvm
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