linux-kernel - [PATCH 4/4] x86: only CPU features determine NX capabilities

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Message-ID: <20101109221905.GB5876@outflux.net>
Date:	Tue, 9 Nov 2010 14:19:05 -0800
From:	Kees Cook <kees.cook@...onical.com>
To:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] x86: only CPU features determine NX capabilities

Fix the NX feature boot warning when NX is missing to correctly
reflect that BIOSes cannot disable NX now.

Signed-off-by: Kees Cook <kees.cook@...onical.com>
Acked-by: Pekka Enberg <penberg@...nel.org>
---
 arch/x86/mm/setup_nx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/setup_nx.c b/arch/x86/mm/setup_nx.c
index a3250aa..410531d 100644
--- a/arch/x86/mm/setup_nx.c
+++ b/arch/x86/mm/setup_nx.c
@@ -41,7 +41,7 @@ void __init x86_report_nx(void)
 {
 	if (!cpu_has_nx) {
 		printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
-		       "missing in CPU or disabled in BIOS!\n");
+		       "missing in CPU!\n");
 	} else {
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
 		if (disable_nx) {
-- 
1.7.2.3


-- 
Kees Cook
Ubuntu Security Team
--
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