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Message-ID: <51645D6F.7070705@zytor.com>
Date: Tue, 09 Apr 2013 11:26:55 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Kees Cook <keescook@...omium.org>
CC: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>,
Ingo Molnar <mingo@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
"x86@...nel.org" <x86@...nel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Jeremy Fitzhardinge <jeremy@...p.org>,
Marcelo Tosatti <mtosatti@...hat.com>, Alex Shi <alex.shi@...el.com>,
Borislav Petkov <borislav.petkov@....com>,
Alexander Duyck <alexander.h.duyck@...el.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
"virtualization@...ts.linux-foundation.org" <virtualization@...ts.linux-foundation.org>,
Dan Rosenberg <drosenberg@...curity.com>,
Julien Tinnes <jln@...gle.com>, Will Drewry <wad@...omium.org>,
Eric Northup <digitaleric@...gle.com>
Subject: Re: Re: [PATCH] x86: make IDT read-only
On 04/09/2013 11:22 AM, Kees Cook wrote:
>
> $ ./sgdt
> ffff88001fc04000
> # cat /sys/kernel/debug/kernel_page_tables
> ...
> ---[ Low Kernel Mapping ]---
> ...
> 0xffff880001e00000-0xffff88001fe00000 480M RW PSE GLB NX pmd
>
That is the 1:1 memory map area...
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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