linux-kernel - Re: [PATCH] net: pre-clear the returned sockaddr

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Message-Id: <20130409.150543.466468818028967750.davem@davemloft.net>
Date:	Tue, 09 Apr 2013 15:05:43 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	keescook@...omium.org
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	minipli@...glemail.com, spender@...ecurity.net
Subject: Re: [PATCH] net: pre-clear the returned sockaddr_storage variable

From: Kees Cook <keescook@...omium.org>
Date: Tue, 9 Apr 2013 10:50:24 -0700

> To avoid future stack content leaks in the various protocols, pre-clear
> the returned memory.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Suggested-by: Brad Spengler <spender@...ecurity.net>

No thanks, clearing 2 full cache lines unnecessarily on every socket
call has real cost.
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