On Sat, Mar 30, 2019 at 9:34 AM Daniel Colascione [off-list ref] wrote:

Just to be clear, I'm not proposing granting secret access to procfs,
and as far as I can see, nobody else is either. We've been talking
about making it easier to avoid races when you happen to want a pidfd
and a procfs fd that point to the same process

So I thought that was the whole point of just opening /proc/<pid>.
Exactly because that way you can then use openat() from there on.

                              Linus