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

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Date:	Wed, 23 Aug 2006 16:41:09 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	Kylene Jo Hall <kjhall@...ibm.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	LSM ML <linux-security-module@...r.kernel.org>,
	Dave Safford <safford@...ibm.com>,
	Mimi Zohar <zohar@...ibm.com>, Serge Hallyn <sergeh@...ibm.com>
Subject: Re: [PATCH 3/7] SLIM main patch

On Wed, Aug 23, 2006 at 01:35:56PM -0700, Kylene Jo Hall wrote:
> Example: The current process is running at the USER level and writing to
> a USER file in /home/user/.  The process then attempts to read an
> UNTRUSTED file.  The current process will become UNTRUSTED and the read
> allowed to proceed but first write access to all USER files is revoked
> including the ones it has open.

Don't threads share file tables?  What is preventing malicious code from 
starting another thread which continues writing to the file that the 
revoke attempt is made on?

		-ben
-- 
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