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

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Date:	Fri, 21 Feb 2014 15:01:27 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Kees Cook <keescook@...omium.org>,
	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 01:27 PM, Andrew Morton wrote:
> On Fri, 21 Feb 2014 13:18:26 -0800 "H. Peter Anvin" <hpa@...or.com> wrote:
> 
>> On 02/21/2014 01:15 PM, Andrew Morton 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.
>>>
>>> I think there were issues with some embedded systems where it's
>>> hard/impossible to provide/alter boot parameters.
>>>
>>
>> We now allow kernel parameters to be compiled into the kernel image for
>> that reason.
> 
> We do?  What's that Kconfig variable called?
> 

CONFIG_CMDLINE and CONFIG_CMDLINE_OVERRIDE.  They seem to be
x86-specific at this time, although I think some other arches have
similar hacks.

	-hpa

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