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Date: Fri, 30 Nov 2007 13:30:52 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Valdis.Kletnieks@vt.edu
Cc: Jon Masters <jonathan@jonmasters.org>, Ray Lee <ray-lk@madrabbit.org>,
       tvrtko.ursulin@sophos.com, Al Viro <viro@ftp.linux.org.uk>,
       Casey Schaufler <casey@schaufler-ca.com>,
       Christoph Hellwig <hch@infradead.org>, linux-kernel@vger.kernel.org
Subject: Re: Out of tree module using LSM
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> 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