releases/2.6.26.2/x86-idle-process-add-checking-for-null-early-param.patch

From oliver@zipernowsky.hu  Fri Aug  1 16:55:44 2008
From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Thu, 31 Jul 2008 20:52:21 +0200
Subject: x86: idle process - add checking for NULL early param
To: Cyrill Gorcunov <gorcunov@gmail.com>, stable@kernel.org
Cc: akpm@linux-foundation.org, andi@firstfloor.org, Ingo Molnar <mingo@elte.hu>, Oliver Pinter <oliver.pntr@gmail.com>
Message-ID: <d97f06741afb88167ba45ca72d4f10b6@zipernowsky.hu>

From: Cyrill Gorcunov <gorcunov@gmail.com>

[ Upstream commit ab6bc3e343fbe3be4a0f67225e849d0db6b4b7ac ]

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: akpm@linux-foundation.org
Cc: andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
CC: Oliver Pinter <oliver.pntr@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 arch/x86/kernel/process.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -164,6 +164,9 @@ void __cpuinit select_idle_routine(const
 
 static int __init idle_setup(char *str)
 {
+	if (!str)
+		return -EINVAL;
+
 	if (!strcmp(str, "poll")) {
 		printk("using polling idle threads.\n");
 		pm_idle = poll_idle;