The late April release of the Linux 6.3 kernel revealed a bug that corrupted XFS file system metadata. The problem is still unfixed and manifests itself in the latest update 6.3.4 among other things (the corruption was fixed in releases 6.3.1, 6.3.2, 6.3.3 and 6.3.4, but the manifestation of the problem is in question in release 6.3.0). In earlier branches of the kernel, such as 6.2, as well as in the 6.4 branch that is in development, the manifestation of the problem is not fixed. The change that caused the problem and the exact factors that caused the error have not yet been determined. XFS users should refrain from updating the kernel to the 6.3 branch until the situation is clearer.
Source: opennet.ru