On Mon, Feb 22, 2021 at 09:44:40AM -0600, Eric W. Biederman wrote: > Alexey Gladkov <gladkov.alexey@xxxxxxxxx> writes: > > > If only the dynamic part of procfs is mounted (subset=pid), then there is no > > need to check if procfs is fully visible to the user in the new user > > namespace. > > > A couple of things. > > 1) Allowing the mount should come in the last patch. So we don't have a > bisect hazard. > > 2) We should document that we still require a mount of proc to match on > atime and readonly mount attributes. Ok. I will try to do it in v5. > 3) If we can find a way to safely not require a previous mount of proc > this will be much more valuable. True, but for now I have no idea how to do it. I would prefer to move in small steps. -- Rgrds, legion
