Due to a problematic patch that was backported from Linux 6.5 in 6.1 causing interference between Ext4 and iomap code, there is a possibility of data corruption in older kernels - especially in recent point releases Linux 6.1 LTS, which can currently be found in distributions such as Debian 12.
A possible EXT4 file system data corruption error that occurs in similar versions Linux 6.1.64 and 6.1.55 blame a "subtle interaction" between iomap and Ext4. The new version Linux 6.1.66 already fixes the identified bug.
Source: linux.org.ru
