linux-kernel - Re: [PATCH v3 0/2] make kASLR vs hibernation boot-time selectable

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Message-ID: <CAGXu5jKpSqu6-AeHoiEhBzEYSujthT_UeHNSUKQ6TXhg-S=SPg@mail.gmail.com>
Date:	Fri, 13 Jun 2014 23:09:15 -0700
From:	Kees Cook <keescook@...omium.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Josh Boyer <jwboyer@...oraproject.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"x86@...nel.org" <x86@...nel.org>, Len Brown <len.brown@...el.com>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 0/2] make kASLR vs hibernation boot-time selectable

On Fri, Jun 13, 2014 at 4:25 PM, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> On Friday, June 13, 2014 01:30:34 PM Kees Cook wrote:
>> Distros want to be able to offer CONFIG_RANDOMIZE_BASE as well as
>> CONFIG_HIBERNATION in a single kernel. Instead of making kASLR depend on
>> !HIBERNATION at compile time, allow kaslr to be selectable at boot time
>> (via "kaslr" kernel command line), which will disable hibernation in the
>> kernel. In this way the end user can choose which feature they want more
>> with hibernation continuing to stay enabled by default (no surprises).
>>
>> This also has the benefit of being able to entirely disable hibernation
>> from the kernel command line, regardless of kASLR, which is a separately
>> desired feature as well.
>>
>> v3:
>> - switch from EINVAL to EPERM (pavel, jwboyer)
>> v2:
>> - rework using kernel command line instead of hibernation_mode (rjw)
>
> That looks kind of OK.
>
> Do you want me to push this through my tree?

Thanks, yes, that would be great.

-Kees

-- 
Kees Cook
Chrome OS Security
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