linux-kernel - Re: [PATCH 3/7] SLIM main patch

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Message-ID: <20060824141657.GC32764@sergelap.austin.ibm.com>
Date:	Thu, 24 Aug 2006 09:16:57 -0500
From:	"Serge E. Hallyn" <sergeh@...ibm.com>
To:	Benjamin LaHaise <bcrl@...ck.org>
Cc:	serue@...ibm.com, Serge E Hallyn <sergeh@...ibm.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, kjhall@...ibm.com,
	linux-kernel <linux-kernel@...r.kernel.org>,
	LSM ML <linux-security-module@...r.kernel.org>,
	David Safford <safford@...ibm.com>,
	Mimi Zohar <zohar@...ibm.com>
Subject: Re: [PATCH 3/7] SLIM main patch

Quoting Benjamin LaHaise (bcrl@...ck.org):
> On Thu, Aug 24, 2006 at 08:58:03AM -0500, Serge E. Hallyn wrote:
> > Still not certain this is needed.  If you were able to write data to a
> > pipe, then even though data may be in the buffer, the other end
> > shouldn't be able to read it if it's own level were changed.
> 
> Then what is the benefit of the supposed revoke if it can be trivially 
> bypassed?

How is it being bypassed?

If it can be shown how what is there is insufficient, then it'll have to
be fixed.  I'm just not seeing it yet.

> Security has not been improved.  It is better not to provide 
> a supposed feature than to offer it up so riddled with holes as to make 
> it pointless.

Some would say it's better to show what you've got, let others point out
the faults, and fix them.  How else will anything ever get done...

-serge
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