linux-kernel - Re: [PATCH v8 1/4] x86/KASLR: Clarify identity map interface

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Message-ID: <20160510174407.GG28520@pd.tnic>
Date:	Tue, 10 May 2016 19:44:07 +0200
From:	Borislav Petkov <bp@...e.de>
To:	Kees Cook <keescook@...omium.org>
Cc:	Ingo Molnar <mingo@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
	Baoquan He <bhe@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Vivek Goyal <vgoyal@...hat.com>,
	Andy Lutomirski <luto@...nel.org>, lasse.collin@...aani.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Young <dyoung@...hat.com>,
	kernel-hardening@...ts.openwall.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 1/4] x86/KASLR: Clarify identity map interface

On Tue, May 10, 2016 at 10:19:12AM -0700, Kees Cook wrote:
> This extracts the call to prepare_level4() into a top-level function
> that the user of the pagetable.c interface must call to initialize
> the new page tables. For clarity and to match the "finalize" function,
> it has been renamed to initialize_identity_maps(). This function also
> gains the initialization of mapping_info so we don't have to do it each
> time in add_identity_map().
> 
> Additionally add copyright notice to the top, to make it clear that the
> bulk of the pagetable.c code was written by Yinghai, and that I just
> added bugs later. :)
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  arch/x86/boot/compressed/kaslr.c     |  3 +++
>  arch/x86/boot/compressed/misc.h      |  3 +++
>  arch/x86/boot/compressed/pagetable.c | 26 ++++++++++++++++----------
>  3 files changed, 22 insertions(+), 10 deletions(-)

Exactly!

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--