Re: RFC: [PATCH] SCM_CREDS support 1(2)

[Samuel Thibault]

Svante Signell, le Wed 16 Oct 2013 00:40:18 +0200, a écrit :
> On Wed, 2013-10-16 at 00:28 +0200, Samuel Thibault wrote:
> > Svante Signell, le Tue 15 Oct 2013 10:33:12 +0200, a écrit :
> > > +   pids = __getpid();
> > > +   euids = __geteuid();
> > > +   auids = __getuid();
> > > +   egids = __getegid();
> > > +   agids = __getgid();
> > 
> > Err, which part of the protocol which check that these are actually the
> > proper value?  What prevents a process from lying its *uid and *gid
> > values?  That is part of what SCM_CREDS is supposed to provide.
> 
> checked by the check_auth() call, is that wrong?

But that is called on the sending side (sendmsg), not on the receiving
side (recvmsg), isn't it?

Samuel