On Fri, 2009-02-06 at 13:59 -0600, Joe Nall wrote:
> On Feb 6, 2009, at 12:15 PM, Christopher J. PeBenito wrote:
>
> > On Fri, 2009-02-06 at 12:42 -0500, Stephen Smalley wrote:
> >> On Fri, 2009-02-06 at 10:21 -0600, Joe Nall wrote:
> >>> I confused by the behavior of security_compute_av_raw in fedora
> >>> rawhide
> >>> ...
> >>> rc = security_compute_av_raw(ctx, raw, SECCLASS_CONTEXT,
> >>> CONTEXT__CONTAINS, &avd);
> >>> log_debug("ctx=%s raw=%s avd.allowed=%d rc=%d\n", ctx, raw,
> >>> avd.allowed, rc);
> >>> ...
> >>>
> >>> with ctx and raw identical user contexts, it works as expected:
> >>>
> >>> ctx=user_u:user_r:user_t:s15:c0.c1023
> >>> raw=user_u:user_r:user_t:s15:c0.c1023 avd.allowed=2 rc=0
> >>>
> >>> with ctx and raw identical system contexts, it behaves differently:
> >>>
> >>> ctx=system_u:system_r:setrans_t:s15:c0.c1023
> >>> raw=system_u:system_r:setrans_t:s15:c0.c1023 avd.allowed=1 rc=0
> >>>
> >>> both in mls/permissive. No obvious avcs.
> >>
> >> The refpolicy only allows context contains permission for the user
> >> domains since that was the only usage of it originally, when checking
> >> whether a user-supplied context was contained by the seusers-defined
> >> range. It is allowed by the interfaces in userdomain.if. If you
> >> want
> >> it applied to all domains, you'll need to make it part of
> >> domain_type().
> >
> > If it makes sense, I have no trouble doing that upstream. Joe, what
> > do
> > you think?
>
> Works for me. At a minimum we need:
>
> gen_require(`
> type setrans_t;
> class context contains;
> ')
> allow setrans_t self:context contains;
>
> for Eamon's color mcstrans patch to work. See Ted's earlier email:
>
> http://engardelinux.org/modules/index/list_archives.cgi?list=selinux&page=0015.html&month=2009-01
>
> I got to rediscover the issue and have Stephen explain it again :)
That's why they call me Smoogle.
--
Stephen Smalley
National Security Agency
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