linux-kernel - Re: [GIT PULL] x86/kaslr for v3.14

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Message-ID: <52DDAA87.40804@linux.intel.com>
Date:	Mon, 20 Jan 2014 15:00:23 -0800
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	Cong Ding <dinggnu@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Ingo Molnar <mingo@...nel.org>,
	Kees Cook <keescook@...omium.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Michael Davidson <md@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
Subject: Re: [GIT PULL] x86/kaslr for v3.14

On 01/20/2014 02:54 PM, Linus Torvalds wrote:
> So I pulled this, but one question:
> 
> On Mon, Jan 20, 2014 at 8:47 AM, H. Peter Anvin <hpa@...or.com> wrote:
>> +config RANDOMIZE_BASE
>> +       bool "Randomize the address of the kernel image"
>> +       depends on RELOCATABLE
>> +       depends on !HIBERNATION
> 
> How fundamental is that "!HIBERNATION" issue? Right now that
> anti-dependency on hibernation support will mean that no distro kernel
> will actually use the kernel address space randomization. Which
> long-term is a problem.
> 
> I'm not sure HIBERNATION is really getting all that much use, but I
> suspect distros would still want to support it.
> 
> Is it just a temporary "I wasn't able to make it work, need to get
> some PM people involved", or is it something really fundamental?
> 

Kees, could you comment?

	-hpa


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