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    SubjectRe: [RFC][PATCH -v2] Smack: Integrate with Audit

    On Wed, 2008-03-12 at 08:40 -0700, Casey Schaufler wrote:
    > --- Stephen Smalley <> wrote:
    > >
    > > On Wed, 2008-03-12 at 04:44 +0200, Ahmed S. Darwish wrote:
    > > > Hi!,
    > > >
    > > > Setup the new Audit hooks for Smack. The AUDIT_SUBJ_USER and
    > > > AUDIT_OBJ_USER SELinux flags are recycled to avoid `auditd'
    > > > userspace modifications. Smack only needs auditing on
    > > > a subject/object bases, so those flags were enough.
    > >
    > > Only question I have is whether audit folks are ok with reuse of the
    > > flags in this manner, and whether the _USER flag is best suited for this
    > > purpose if you are going to reuse an existing flag (since Smack label
    > > seems more like a SELinux type than a SELinux user).
    > To-mate-o toe-maht-o.
    > There really doesn't seem to be any real reason to create a new
    > flag just because the granularity is different. The choice between
    > _USER and _TYPE (and _ROLE for that matter) is arbitrary from a
    > functional point of view. I say that since Smack has users, but
    > not types or roles, _USER makes the most sense.

    Perhaps I misunderstand, but Smack labels don't represent users (i.e.
    user identity) in any way, so it seemed like a mismatch to use the _USER
    flag there. Whereas types in SELinux bear some similarity to Smack
    labels - simple unstructured names whose meaning is only defined by the
    policy rules.

    Regardless, it seems like the audit maintainers ought to weigh in on the

    > > Certainly will confuse matters if a user has audit filters on SELinux
    > > users in their /etc/audit/audit.rules and then boots a kernel with Smack
    > > enabled.
    > Somehow I doubt that will be their biggest concern.

    Stephen Smalley
    National Security Agency

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