linux-kernel - Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching

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Message-ID: <Line.LNX.4.64.0706152334570.30443@localhost.localdomain>
Date:	Fri, 15 Jun 2007 23:39:05 -0400 (EDT)
From:	James Morris <jmorris@...ei.org>
To:	Casey Schaufler <casey@...aufler-ca.com>
cc:	Greg KH <greg@...ah.com>, Pavel Machek <pavel@....cz>,
	Crispin Cowan <crispin@...ell.com>,
	Andreas Gruenbacher <agruen@...e.de>,
	Stephen Smalley <sds@...ho.nsa.gov>, jjohansen@...e.de,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation,
 pathname matching

On Fri, 15 Jun 2007, Casey Schaufler wrote:

> 
> --- James Morris <jmorris@...ei.org> wrote:
> 
> > On my system, it takes about 1.2 seconds to label a fully checked out 
> > kernel source tree with ~23,000 files in this manner
> 
> That's an eternity for that many files to be improperly labeled.
> If, and the "if" didn't originate with me, your policy is
> demonstrably correct (how do you do that?) for all domains
> you could claim that the action is safe, if not ideal. 
> I can't say if an evaluation team would buy the "safe"
> argument. They've been known to balk before.

To clarify:

We are discussing a scheme where the underlying SELinux labeling policy 
always ensures a safe label on a file, and then relabeling newly created 
files according to their pathnames.

There is no expectation that this scheme would be submitted for 
certification.  Its purpose is to merely to provide pathname-based 
labeling outside of the kernel.



- James
-- 
James Morris
<jmorris@...ei.org>
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