linux-kernel - Re: [PATCH] tcp: sysctl to disable TCP simultaneous connect

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Message-Id: <20130207.142911.101451648518406435.davem@davemloft.net>
Date:	Thu, 07 Feb 2013 14:29:11 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	keescook@...omium.org
Cc:	stephen@...workplumber.org, linux-kernel@...r.kernel.org,
	rob@...dley.net, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, edumazet@...gle.com,
	nhorman@...driver.com, ycheng@...gle.com, davidshan@...cent.com,
	linux-doc@...r.kernel.org, netdev@...r.kernel.org, w@....eu
Subject: Re: [PATCH] tcp: sysctl to disable TCP simultaneous connect

From: Kees Cook <keescook@...omium.org>
Date: Thu, 7 Feb 2013 10:44:02 -0800

> David: I know you aren't a fan of this patch, but I'd like to try to
> convince you. :) This leaves the feature enabled and add a toggle for
> systems (like Chrome OS) that don't want to risk this DoS at all.
> There are so very many other toggle, I don't see why this one would be
> a problem to add.

We're not in the business of allowing the changing of the TCP state
machine behavior like this.  Sorry.
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