linux-kernel - Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR

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Message-ID: <CACXcFmnu5M_pQw5oTU+P6j7udj2vJSjctHDT0NY5Xc3uuf-Ovg@mail.gmail.com>
Date:	Thu, 23 Jun 2016 15:45:54 -0400
From:	Sandy Harris <sandyinchina@...il.com>
To:	kernel-hardening@...ts.openwall.com
Cc:	Kees Cook <keescook@...omium.org>,
	Thomas Garnier <thgarnie@...gle.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andy Lutomirski <luto@...nel.org>,
	"x86@...nel.org" <x86@...nel.org>, Borislav Petkov <bp@...e.de>,
	Baoquan He <bhe@...hat.com>, Yinghai Lu <yinghai@...nel.org>,
	Juergen Gross <jgross@...e.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Toshi Kani <toshi.kani@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Xiao Guangrong <guangrong.xiao@...ux.intel.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Alexander Kuleshov <kuleshovmail@...il.com>,
	Alexander Popov <alpopov@...ecurity.com>,
	Dave Young <dyoung@...hat.com>, Joerg Roedel <jroedel@...e.de>,
	Lv Zheng <lv.zheng@...el.com>,
	Mark Salter <msalter@...hat.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Stephen Smalley <sds@...ho.nsa.gov>,
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	LKML <linux-kernel@...r.kernel.org>,
	Jonathan Corbet <corbet@....net>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [kernel-hardening] [PATCH v7 0/9] x86/mm: memory area address KASLR

Jason Cooper <jason@...edaemon.net> wrote:

> Modern systems that receive a seed from the bootloader via the
> random-seed property (typically from the hw-rng) can mix both sources
> for increased resilience.
>
> Unfortunately, I'm not very familiar with the internals of x86
> bootstrapping.  Could GRUB be scripted to do a similar task?  How would
> the address and size of the seed be passed to the kernel?  command line?

One suggestion is at:
http://www.av8n.com/computer/htm/secure-random.htm#sec-boot-image