CVE-2025-38660

In the Linux kernel, the following vulnerability has been resolved:

[ceph] parse_longname(): strrchr() expects NUL-terminated string

… and parse_longname() is not guaranteed that. That’s the reason
why it uses kmemdup_nul() to build the argument for kstrtou64();
the problem is, kstrtou64() is not the only thing that need it.

Just get a NUL-terminated copy of the entire thing and be done
with that…

More information : https://git.kernel.org/stable/c/101841c38346f4ca41dc1802c867da990ffb32eb