linux-kernel - Re: [PATCH 6/6] x86: kaslr: relocate base offset at boot

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Message-ID: <20130416130854.GA20961@gmail.com>
Date:	Tue, 16 Apr 2013 15:08:54 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Yinghai Lu <yinghai@...nel.org>, Kees Cook <keescook@...omium.org>,
	Eric Northup <digitaleric@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"kernel-hardening@...ts.openwall.com" 
	<kernel-hardening@...ts.openwall.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Jarkko Sakkinen <jarkko.sakkinen@...el.com>,
	Matthew Garrett <mjg@...hat.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Dan Rosenberg <drosenberg@...curity.com>,
	Julien Tinnes <jln@...gle.com>, Will Drewry <wad@...omium.org>
Subject: Re: [PATCH 6/6] x86: kaslr: relocate base offset at boot


* H. Peter Anvin <hpa@...or.com> wrote:

> No.  Fixing one bootloader is almost impossible.  Fixing them all is a 
> Sisiphyean task.

It's a self inflicted wound really: if only we had a reference bootloader in the 
kernel tree, which we could fix. The effort that went into fixing various 
bootloader interactions would have been enough to write two new bootloaders from 
scratch.

Thanks,

	Ingo
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