Re: [PATCH] fs/ceph/mds_client: give up on paths longer than PATH_MAX

On Tue, Nov 19, 2024 at 2:58 PM Patrick Donnelly pdonnell@redhat.com wrote:

The protocol does **not** require building the full path for most operations unless it involves a snapshot.

We don't use Ceph snapshots, but before today's emergency update, we could shoot down an arbitrary server with a single (unprivileged) system call using this vulnerability.

I'm not sure what your point is, but this vulnerability exists, it works without snapshots and we think it's serious.