Linux Kernel GFS2 Address Space Truncation Vulnerability

A vulnerability in the Linux kernel's GFS2 file system has been addressed, which involved improper handling of an inode's address space when the GFS2_DIF_JDATA flag was changed. This flag determines whether the address space pages utilize buffer heads or iomap_folio_state structures, and mixing these two can lead to issues.

Impact

The vulnerability could cause data corruption by improperly managing the address space of inodes, potentially leading to inconsistencies in how data is buffered or mapped.