From: Randy Dunlap <randy.dunlap@oracle•com>
To: Siarhei Liakh <sliakh.lkml@gmail•com>
Cc: linux-kernel@vger•kernel.org,
linux-security-module@vger•kernel.org,
linux-next@vger•kernel.org,
Arjan van de Ven <arjan@infradead•org>,
James Morris <jmorris@namei•org>,
Andrew Morton <akpm@linux-foundation•org>, Andi Kleen <ak@muc•de>,
Thomas Gleixner <tglx@linutronix•de>,
"H. Peter Anvin" <hpa@zytor•com>, Ingo Molnar <mingo@elte•hu>,
Rusty Russell <rusty@rustcorp•com.au>,
Stephen Rothwell <sfr@canb•auug.org.au>,
Dave Jones <davej@redhat•com>
Subject: Re: [PATCH 2/4] [tip:x86/mm] Set first MB as RW+NX
Date: Thu, 27 May 2010 09:55:46 -0700 [thread overview]
Message-ID: <20100527095546.bb1bb941.randy.dunlap@oracle.com> (raw)
In-Reply-To: <AANLkTin1B96oeU50v0FPSJcVVFEKYos8-jM_i9eRiKxF@mail.gmail.com>
Hi,
On Thu, 27 May 2010 12:52:21 -0400 Siarhei Liakh wrote:
> diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
> index 4814d35..6dbcb6f 100644
> --- a/arch/x86/Kconfig.debug
> +++ b/arch/x86/Kconfig.debug
> @@ -123,6 +123,17 @@ config DEBUG_NX_TEST
> and the software setup of this feature.
> If in doubt, say "N"
>
> +config DEBUG_SET_1ST_MB_RWNX
> + bool "Set 1st MB of kernel space mapping as RW+NX"
> + default n
> + depends on X86
> + ---help---
> + This option helps to catch unintended modifications/execution of
> + 1st megabyte of kernel address space. Such protection may interfere
> + with run-time code patching and legacy BIOS services residing within
> + the 1st MB of physical address space.
> + If in doubt, say "N".
Please spell out "first" instead of "1st" (all places in user-visible text).
and gmail is space-stuffing your patches (converting tabs to spaces).
Not good. Are you using the gmail web interface for patches?
That won't work AFAIK. You'll need to use a real mail client.
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
next prev parent reply other threads:[~2010-05-27 16:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-27 16:52 [PATCH 2/4] [tip:x86/mm] Set first MB as RW+NX Siarhei Liakh
2010-05-27 16:55 ` Randy Dunlap [this message]
2010-05-27 16:58 ` Siarhei Liakh
-- strict thread matches above, loose matches on Subject: below --
2010-04-01 1:59 Siarhei Liakh
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