linux-kernel - Re: [PATCH 2/3] CRED: Split the task security data and move part of it into struct cred

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Message-ID: <402619.1696.qm@web36606.mail.mud.yahoo.com>
Date:	Wed, 26 Sep 2007 07:58:32 -0700 (PDT)
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	David Howells <dhowells@...hat.com>,
	Stephen Smalley <sds@...ho.nsa.gov>
Cc:	dhowells@...hat.com, "Serge E. Hallyn" <serge@...lyn.com>,
	viro@....linux.org.uk, hch@...radead.org,
	Trond.Myklebust@...app.com, casey@...aufler-ca.com,
	linux-kernel@...r.kernel.org, selinux@...ho.nsa.gov,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH 2/3] CRED: Split the task security data and move part of it into struct cred


--- David Howells <dhowells@...hat.com> wrote:

> Stephen Smalley <sds@...ho.nsa.gov> wrote:
> 
> > Precisely when to use one identity vs. the other though isn't always
> > clear, and the potential for accidental divergence is also a concern.
> 
> What should auditing use in audit_filter_rules() when dealing with
> AUDIT_SUBJ_* cases?  Should the SUBJ cases use the subjective SID and the
> AUDIT_OBJ_* cases use the objective SID?  On the other hand AUDIT_OBJ_* cases
> don't seem to have anything to do with tasks.

I believe that you'll need to audit both sets of credentials.
I think that for audit filtering you will need to have the ability
to filter on either. It's no different from the euid/ruid split.


Casey Schaufler
casey@...aufler-ca.com
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