linux-kernel - Re: CC_STACKPROTECTOR vs CC_STACKPROTECTOR

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Date:	Wed, 29 Apr 2009 22:24:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Kees Cook <kees@...ntu.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: CC_STACKPROTECTOR vs CC_STACKPROTECTOR_ALL


* Kees Cook <kees@...ntu.com> wrote:

> Hi,
> 
> What is the rationale for why CC_STACKPROTECTOR_ALL is forced when 
> using CC_STACKPROTECTOR?  I would have expected _ALL to be a 
> separate option (as it was in earlier versions), but it seems it 
> is forced on by commit 113c5413cf9051cc50b88befdc42e3402bb92115.

it used to be a separate option. I merged them into one, because we 
had too many options really, and because the vmsplice exploit would 
only have been caught by the _ALL variant. So the 'light' variant 
never really worked well IMO.

	Ingo
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