Re: [PATCH 3/3] p9auth: add p9auth driver

[ebiederm@xmission.com (Eric W. Biederman)]

"Serge E. Hallyn" <serue@us.ibm.com> writes:

> Ignoring namespaces for a moment, I guess we could do something like
>
> struct credentials_pass {
> 	pid_t global_pid;
> 	unsigned long unique_id;
> 	uid_t new_uid;
> 	gid_t new_gid;
> 	int num_aux_gids;
> 	gid_t aux_gids[];
> }

This looks surprising like what I am doing in passing uids and pids
through unix domain sockets.

So if this looks like a direction we want to go it shouldn't be too
difficult.

>> That also btw needs fixing for other reasons - more than one daemon has
>> been written that generically uses recvmsg and so can be attacked with FD
>> leaks >-)
>
> Yup.
>
> (By 'needs fixing' you just mean needs to be done right for this
> service?  Else I think I'm missing something...)

Remember my unix domain socket and the patch for converting struct cred
into a new context, from a month or so ago.  I think that is what we
are talking about.

Eric