netdev - Re: [PATCH] Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE

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Date:	Thu, 22 May 2008 11:28:25 +0200
From:	Helge Hafting <helge.hafting@...el.hist.no>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Herbert Xu <herbert@...dor.apana.org.au>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jeff Garzik <jeff@...zik.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Chris Peterson <cpeterso@...terso.com>,
	tpmdd-devel@...ts.sourceforge.net, tpm@...horst.net
Subject: Re: [PATCH] Re: [PATCH] drivers/net: remove network drivers' last
 few uses of IRQF_SAMPLE_RANDOM

Andi Kleen wrote:
> Herbert Xu wrote:
>   
>>
>> You can continue to feed data into the pool even if it fails the
>> test.  You just keep the entropy value same as before.
>>     
>
> You could do that, but what advantage would it have? I don't think it's
> worth running the FIPS test, or rather requiring the user land daemon
> and leaving behind most of the userbase just for this.
>   
Security through obfuscation?
Someone trying to predict the RNG can do so in theory, but if
they have to keep track of network timings, disk activity, and 5 other 
things, then
chances are that they fail ofen enough even if the attack is possible 
"in theory".

Helge Hafting
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