Fixes —– A maliciously corrupted file systems can trigger buffer overruns in the quota code used by e2fsck. (Addresses CVE-2019-5094) E2fsck now checks to make sure the casefold flag is only set on directories, and only when the casefold feature is enabled. E2fsck will not disable the low dtime checks when using a backup superblock where the last mount time is zero. This fixes a