CVE-2024-53685 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ceph: give up on paths longer than PATH_MAX

If the full path to be built by ceph_mdsc_build_path() happens to be longer than PATH_MAX then this function will enter an endless (retry) loop effectively blocking the whole task. Most of the machine becomes unusable making this a very simple and effective DoS vulnerability.

I cannot imagine why this retry was ever implemented but it seems rather useless and harmful to me. Let’s remove it and fail with ENAMETOOLONG instead.

Reference

https://git.kernel.org/stable/c/550f7ca98ee028a606aa75705a7e77b1bd11720f https://git.kernel.org/stable/c/99a37ab76a315c8307eb5b0dc095d8ad9d8efeaa https://git.kernel.org/stable/c/c47ed91156daf328601d02b58d52d9804da54108