linux-kernel - [v2.6.34-stable 125/165] PM / Suspend: Off by one in pm

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Message-ID: <1345060109-9187-126-git-send-email-paul.gortmaker@windriver.com>
Date:	Wed, 15 Aug 2012 15:47:49 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	<stable@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:	Dan Carpenter <dan.carpenter@...cle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [v2.6.34-stable 125/165] PM / Suspend: Off by one in pm_suspend()

From: Dan Carpenter <dan.carpenter@...cle.com>

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git
    If you see a problem with using this for longterm, please comment.
                   -------------------

commit 528f7ce6e439edeac38f6b3f8561f1be129b5e91 upstream.

In enter_state() we use "state" as an offset for the pm_states[]
array.  The pm_states[] array only has PM_SUSPEND_MAX elements so
this test is off by one.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 kernel/power/suspend.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 56e7dbb..7d4ae3b 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -297,7 +297,7 @@ int enter_state(suspend_state_t state)
  */
 int pm_suspend(suspend_state_t state)
 {
-	if (state > PM_SUSPEND_ON && state <= PM_SUSPEND_MAX)
+	if (state > PM_SUSPEND_ON && state < PM_SUSPEND_MAX)
 		return enter_state(state);
 	return -EINVAL;
 }
-- 
1.7.12.rc2

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