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

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Message-ID: <alpine.DEB.1.10.0808180441560.12859@asgard.lang.hm>
Date:	Mon, 18 Aug 2008 04:44:12 -0700 (PDT)
From:	david@...g.hm
To:	tvrtko.ursulin@...hos.com
cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arjan van de Ven <arjan@...radead.org>,
	Adrian Bunk <bunk@...nel.org>, capibara@...all.nl,
	Casey Schaufler <casey@...aufler-ca.com>, davecb@....com,
	Eric Paris <eparis@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	malware-list@...ts.printk.net,
	malware-list-bounces@...sg.printk.net,
	Mihai Don??u <mdontu@...defender.com>,
	Peter Dolding <oiaohm@...il.com>, Pavel Machek <pavel@...e.cz>,
	Rik van Riel <riel@...hat.com>, rmeijer@...all.nl,
	Theodore Tso <tytso@....edu>
Subject: Re: [malware-list] scanner interface proposal was: [TALPA] Intro to
 a linux interface for on access scanning (fwd)

On Mon, 18 Aug 2008, tvrtko.ursulin@...hos.com wrote:

> David Lang wrote on 18/08/2008 02:25:44:
>
>> what is not covered by this design that is covered by the threat model
> being
>> proposed?
>>
>> what did I over complicate in this design? or is it the minimum feature
> set
>> needed?
>>
>> are any of the features I list impossible to implement?
>
> One more thing - this proposal does not work where there are no extended
> attributes (whether at all or they are disabled at mount time). I think
> that is a serious flaw or at least disadvantage compared to the posted
> implementation.

good point. I should have listed that.

I don't see it as a serious flaw, people who care about this feature can 
just pick an appropriate filesystem to use.

but if extended attributes are not found a strict implementation could 
fall back to scanning on every file access (the extended attributes are 
being used to cache the results of the scans)

David Lang
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