It's pretty rare nowadays seeing any real changes to the JFS file-system on Linux when there are multiple far superior solutions available. But in any event, the JFS file-system driver has seen a few fixes in Linux 7.1.

For anyone still relying on JFS in production, the Linux 7.1 kernel is bringing more robust data integrity checking for the file-system. There are new integrity checks added to address potential index out-of-bounds, index/pointer overflows, and other invalid operations from happening. These data integrity issues were discovered using the Undefined Behavior Sanitizer "UBSAN".

There is also a fix for a corrupted list as well as other fixes to always load the file-system UUID during mount, avoiding a compiler warning, and other small fixes.

So for those interested in JFS in 2026, [1]this pull is now in Git for Linux 7.1.



[1] https://lore.kernel.org/lkml/2e525837-9257-486d-b0f7-e06b2036f417@oracle.com/