linux-kernel - Re: [malware-list] scanner interface proposal was: [TALPA] Intro to a linux interface for on access scanning

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Message-ID: <20080818142511.GC8184@mit.edu>
Date:	Mon, 18 Aug 2008 10:25:11 -0400
From:	Theodore Tso <tytso@....edu>
To:	tvrtko.ursulin@...hos.com
Cc:	david@...g.hm, davecb@....com, Adrian Bunk <bunk@...nel.org>,
	Peter Dolding <oiaohm@...il.com>, rmeijer@...all.nl,
	Mihai Don??u <mdontu@...defender.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	malware-list@...ts.printk.net,
	linux-security-module@...r.kernel.org,
	malware-list-bounces@...sg.printk.net,
	Casey Schaufler <casey@...aufler-ca.com>,
	Pavel Machek <pavel@...e.cz>, capibara@...all.nl,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [malware-list] scanner interface proposal was: [TALPA] Intro
	to a linux interface for on access scanning

On Mon, Aug 18, 2008 at 02:15:24PM +0100, tvrtko.ursulin@...hos.com wrote:
> Then there is still a question of who allows some binary to declare itself 
> exempt. If that decision was a mistake, or it gets compromised security 
> will be off. A very powerful mechanism which must not be easily 
> accessible.  With a good cache your worries go away even without a scheme 
> like this.

I have one word for you --- bittorrent.  If you are downloading a very
large torrent (say approximately a gigabyte), and it contains many
pdf's that are say a few megabytes a piece, and things are coming in
tribbles, having either a indexing scanner or an AV scanner wake up
and rescan the file from scratch each time a tiny piece of the pdf
comes in is going to eat your machine alive....

						- Ted
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