linux-kernel - Re: [PATCH] Revert "x86/mm/ASLR: Propagate base load address calculation"

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Message-ID: <alpine.LNX.2.00.1503161441280.25438@pobox.suse.cz>
Date:	Mon, 16 Mar 2015 14:56:11 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Borislav Petkov <bp@...e.de>
cc:	Ingo Molnar <mingo@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
	Matt Fleming <matt.fleming@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Kees Cook <keescook@...omium.org>, Baoquan He <bhe@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Josh Triplett <josh@...htriplett.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Junjie Mao <eternal.n08@...il.com>
Subject: Re: [PATCH] Revert "x86/mm/ASLR: Propagate base load address
 calculation"

On Mon, 16 Mar 2015, Borislav Petkov wrote:

> On Sat, Mar 14, 2015 at 10:59:23AM +0100, Borislav Petkov wrote:
> > In addition to what you've said, I have only one proposal: we revert
> > the whole crap and do it again, this time nice and clean in tip. It'll
> > stay there as long as it has to. No half-arsed commit messages, no
> > misunderstood crap, no lala code f*ckery. Whatever it takes, as long as
> > it takes.
> 
> And here it is:
> 
> ---
> From: Borislav Petkov <bp@...e.de>
> Date: Mon, 16 Mar 2015 10:57:56 +0100
> Subject: [PATCH] Revert "x86/mm/ASLR: Propagate base load address calculation"
> 
> This reverts commit f47233c2d34f243ecdaac179c3408a39ff9216a7.
> 
> The main reason for the revert is that in order to make this work, we
> need non-trivial changes to the x86 boot code which we didn't manage to
> get done in time for merging.
> 
> And even if we did, they would've been too risky so instead of rushing
> things and break booting 4.1 on boxes left and right, we will be very
> strict and conservative and will take our time with this to fix and test
> it properly.
> 
> Signed-off-by: Borislav Petkov <bp@...e.de>
> Cc: Jiri Kosina <jkosina@...e.cz>

Agreed. Let's work on a better refresh for 4.1+. The fix attempts were 
quite chaotic.

Acked-by: Jiri Kosina <jkosina@...e.cz>

-- 
Jiri Kosina
SUSE Labs
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