linux-kernel - Re: [PATCH 1/8] x86, kaslr: get kaslr

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Message-ID: <CAE9FiQVpWQ1NU5Euy2G4btS=94qKCZZ7T0YFsCR1x6iv4C1hjA@mail.gmail.com>
Date:	Sun, 1 Mar 2015 12:24:08 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Borislav Petkov <bp@...e.de>
Cc:	Ingo Molnar <mingo@...nel.org>, Jiri Kosina <jkosina@...e.cz>,
	Kees Cook <keescook@...omium.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 1/8] x86, kaslr: get kaslr_enabled back correctly

On Sun, Mar 1, 2015 at 11:49 AM, Borislav Petkov <bp@...e.de> wrote:
> On Sun, Mar 01, 2015 at 11:27:48AM -0800, Yinghai Lu wrote:
>> other 7 should also address the problem in
>>    http://lkml.kernel.org/r/1424929021.10337.24.camel@intel.com
>
> No, they don't:
>
> [    0.000000] parse_setup_data: data: 0x2206e50 (va: ffffffffff200e50) { next: 0x0, type: 0x0, len: 16, data[0]: 0x0 }
> [    0.000000] Unknown setup_data type: 0 ignored!
>
> --

ok, i get your point.

static allocation in misc.c can not be used to kernel/head_64.S stage safely.

Thanks

Yinghai
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