In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbDiscardAG This should be applied to most URSAN bugs found recently by syzbot, by guarding the dbMount. As syzbot feeding rubbish into the bmap descriptor.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2025091555-CVE-2022-50333-d81f@gregkh/T