linux-kernel - Re: [PATCH] x86, kaslr: randomize module base load address

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Message-ID: <5307C0A0.9010708@zytor.com>
Date:	Fri, 21 Feb 2014 13:09:52 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Kees Cook <keescook@...omium.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"x86@...nel.org" <x86@...nel.org>,
	Jianguo Wu <wujianguo@...wei.com>,
	Andy Honig <ahonig@...gle.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH] x86, kaslr: randomize module base load address

On 02/21/2014 01:05 PM, Kees Cook wrote:
> 
> I've been slapped down for adding more config options in the past, and
> I think it's unlikely that people using CONFIG_RANDOMIZE_BASE won't
> want the modules base randomized too. I think this is a safe default,
> but if you see it as a requirement, I can change it.
> 

No, but I could totally see people wanting to randomize modules but not
the main kernel.  Why?  Because module addresses are already dynamic, so
there is no breakage.  Whether or not it is *useful* is another matter.

	-hpa

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