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

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Message-ID: <20071130133052.5fdab6f4@the-village.bc.nu>
Date:	Fri, 30 Nov 2007 13:30:52 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Valdis.Kletnieks@...edu
Cc:	Jon Masters <jonathan@...masters.org>,
	Ray Lee <ray-lk@...rabbit.org>, tvrtko.ursulin@...hos.com,
	Al Viro <viro@....linux.org.uk>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Out of tree module using LSM

> Fortunately for all concerned, although Alan's self-modifying code is indeed a
> possibility, it's much less of an issue than the sort of malware that can be
> found with a simple "find this 27-byte sequence, which will be found in either
> block 36 or 37 of the file"

Thats a very old model of detection ;)


There is another usage case for this stuff as well - which is on the fly
indexing of material. An indexer has the same basic needs as a virus
checker (without the blocking aspect) and doesn't have to be robust
against sneaky material.

Alan
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