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

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On Tue, Nov 19, 2024 at 2:58 PM Patrick Donnelly <pdonnell@xxxxxxxxxx> 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.





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