netdev - Re: [PATCH] Prevent reading uninitialized memory with socketfilters

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Message-ID: <504359883-1289413568-cardhu_decombobulator_blackberry.rim.net-525501751-@bda083.bisx.prod.on.blackberry>
Date:	Wed, 10 Nov 2010 18:25:57 +0000
From:	"Dan Rosenberg" <drosenberg@...curity.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, stable@...nel.org, security@...nel.org
Subject: Re: [PATCH] Prevent reading uninitialized memory with socketfilters

Apologies for the terseness, I'm not looking for a fight.

I agree the memset is too expensive, and that Eric's fix is far better.

-Dan

------Original Message------
From: David Miller
To: drosenberg@...curity.com
Cc: netdev@...r.kernel.org
Cc: stable@...nel.org
Cc: security@...nel.org
Subject: Re: [PATCH] Prevent reading uninitialized memory with socketfilters
Sent: Nov 10, 2010 1:21 PM

From: "Dan Rosenberg" <drosenberg@...curity.com>
Date: Wed, 10 Nov 2010 18:18:08 +0000

> The code sample I linked to clearly demonstrates exactly how to
> accomplish this, if you had bothered to read it.

I told you why I didn't read it, if you had bothered to read my
reply properly :-)

Anyways, I realize we have to do something, but memset() is going
to completely kill performance.  I consider Eric's suggestion the
closest to acceptable cost at this point but even that is hard
to digest for me.

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