linux-kernel - Re: Out of tree module using LSM

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Message-ID: <20071202120214.68cf1700@laptopd505.fenrus.org>
Date:	Sun, 2 Dec 2007 12:02:14 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Valdis.Kletnieks@...edu
Cc:	Pavel Machek <pavel@....cz>, tvrtko.ursulin@...hos.com,
	Andi Kleen <andi@...stfloor.org>, ak@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: Out of tree module using LSM

On Sun, 02 Dec 2007 14:44:48 -0500
Valdis.Kletnieks@...edu wrote:

> On Sat, 01 Dec 2007 08:43:32 GMT, Pavel Machek said:
> 
> > So what you are trying to do is 'application may never read bad
> > sequence of bits from disk', right?
> 
> No, in many of the use cases, we're trying to do "if application
> reads certain specified sequences of bits from disk we know about
> it", which is subtly different.  Often, *absolute* prevention isn't
> required, as long as we can generate audit trails and/or alerts...

.. which breaks down if/when glibc uses mmap() to implement the
fopen/fread etc interface
(note: it already does, just not quite yet by default)




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