netdev - Re: [PATCH ghak90 (was ghak32) V4 03/10] audit: log container info of syscalls

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Date:   Thu, 25 Oct 2018 06:49:50 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     sgrubb@...hat.com
Cc:     rgb@...hat.com, simo@...hat.com, carlos@...hat.com,
        linux-api@...r.kernel.org, containers@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, dhowells@...hat.com,
        linux-audit@...hat.com, netfilter-devel@...r.kernel.org,
        ebiederm@...ssion.com, luto@...nel.org, netdev@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Eric Paris <eparis@...isplace.org>,
        Serge Hallyn <serge@...lyn.com>, viro@...iv.linux.org.uk
Subject: Re: [PATCH ghak90 (was ghak32) V4 03/10] audit: log container info of syscalls

On Thu, Oct 25, 2018 at 2:06 AM Steve Grubb <sgrubb@...hat.com> wrote:
> On Wed, 24 Oct 2018 20:42:55 -0400
> Richard Guy Briggs <rgb@...hat.com> wrote:
> > On 2018-10-24 16:55, Paul Moore wrote:
> > > On Wed, Oct 24, 2018 at 11:15 AM Richard Guy Briggs
> > > <rgb@...hat.com> wrote:
> > > > On 2018-10-19 19:16, Paul Moore wrote:
> > > > > On Sun, Aug 5, 2018 at 4:32 AM Richard Guy Briggs
> > > > > <rgb@...hat.com> wrote:

...

> > > > > > +/*
> > > > > > + * audit_log_contid - report container info
> > > > > > + * @tsk: task to be recorded
> > > > > > + * @context: task or local context for record
> > > > > > + * @op: contid string description
> > > > > > + */
> > > > > > +int audit_log_contid(struct task_struct *tsk,
> > > > > > +                            struct audit_context *context,
> > > > > > char *op) +{
> > > > > > +       struct audit_buffer *ab;
> > > > > > +
> > > > > > +       if (!audit_contid_set(tsk))
> > > > > > +               return 0;
> > > > > > +       /* Generate AUDIT_CONTAINER record with container ID
> > > > > > */
> > > > > > +       ab = audit_log_start(context, GFP_KERNEL,
> > > > > > AUDIT_CONTAINER);
> > > > > > +       if (!ab)
> > > > > > +               return -ENOMEM;
> > > > > > +       audit_log_format(ab, "op=%s contid=%llu",
> > > > > > +                        op, audit_get_contid(tsk));
> > > > > > +       audit_log_end(ab);
> > > > > > +       return 0;
> > > > > > +}
> > > > > > +EXPORT_SYMBOL(audit_log_contid);
> > > > >
> > > > > As discussed in the previous iteration of the patch, I prefer
> > > > > AUDIT_CONTAINER_ID here over AUDIT_CONTAINER.  If you feel
> > > > > strongly about keeping it as-is with AUDIT_CONTAINER I suppose
> > > > > I could live with that, but it is isn't my first choice.
> > > >
> > > > I don't have a strong opinion on this one, mildly preferring the
> > > > shorter one only because it is shorter.
> > >
> > > We already have multiple AUDIT_CONTAINER* record types, so it seems
> > > as though we should use "AUDIT_CONTAINER" as a prefix of sorts,
> > > rather than a type itself.
> >
> > I'm fine with that.  I'd still like to hear Steve's input.  He had
> > stronger opinions than me.
>
> The creation event should be separate and distinct from the continuing
> use when its used as a supplemental record. IOW, binding the ID to a
> container is part of the lifecycle and needs to be kept distinct.

Steve's comment is pretty ambiguous when it comes to AUDIT_CONTAINER
vs AUDIT_CONTAINER_ID, but one could argue that AUDIT_CONTAINER_ID
helps distinguish the audit container id marking record and gets to
what I believe is the spirit of Steve's comment.  Taking this in
context with my previous remarks, let's switch to using
AUDIT_CONTAINER_ID.

-- 
paul moore
www.paul-moore.com