linux-kernel - Re: [RFC][PATCH] Randomize kernel base address on boot

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Message-ID: <4DDFE52D.4070308@zytor.com>
Date:	Fri, 27 May 2011 10:53:49 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dan Rosenberg <drosenberg@...curity.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Tony Luck <tony.luck@...il.com>,
	linux-kernel@...r.kernel.org, davej@...hat.com,
	kees.cook@...onical.com, davem@...emloft.net, eranian@...gle.com,
	adobriyan@...il.com, penberg@...nel.org,
	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Valdis.Kletnieks@...edu, pageexec@...email.hu
Subject: Re: [RFC][PATCH] Randomize kernel base address on boot

On 05/27/2011 10:46 AM, Ingo Molnar wrote:
> 
> If i understood you correctly you suggest randomizing the image by 
> shifting the symbols in it around. The boot loader would still load 
> an 'image' where it always loads it - just that image itself is 
> randomized internally somewhat, right?
> 
> ( because that's the only way we can avoid the problems with e820 
>   memory maps which you referred to, if don't actually change the 
>   load address. )
> 

That doesn't solve any problems with the memory map.
	
	-hpa
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