linux-kernel - [PATCH 19/23] arm: Fix possible null pointer read access

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Date:	Sun, 30 Jan 2011 20:29:38 +0100
From:	Stefan Weil <weil@...l.berlios.de>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Stefan Weil <weil@...l.berlios.de>,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 19/23] arm: Fix possible null pointer read access

These errors were found by cppcheck:
arch/arm/mach-omap2/smartreflex.c:784: error: Possible null pointer dereference: sr_info
arch/arm/mach-omap2/smartreflex.c:799: error: Possible null pointer dereference: sr_info

Both conditional statements are executed when sr_info == NULL,
so accessing sr_info->voltdm would fail.

Cc: Russell King <linux@....linux.org.uk>
Cc: linux-omap@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Stefan Weil <weil@...l.berlios.de>
---
 arch/arm/mach-omap2/smartreflex.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 77ecebf..af39d17 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -780,8 +780,7 @@ static int omap_sr_autocomp_show(void *data, u64 *val)
 	struct omap_sr *sr_info = (struct omap_sr *) data;

 	if (!sr_info) {
-		pr_warning("%s: omap_sr struct for sr_%s not found\n",
-			__func__, sr_info->voltdm->name);
+		pr_warning("%s: omap_sr struct not found\n", __func__);
 		return -EINVAL;
 	}

@@ -795,8 +794,7 @@ static int omap_sr_autocomp_store(void *data, u64 val)
 	struct omap_sr *sr_info = (struct omap_sr *) data;

 	if (!sr_info) {
-		pr_warning("%s: omap_sr struct for sr_%s not found\n",
-			__func__, sr_info->voltdm->name);
+		pr_warning("%s: omap_sr struct not found\n", __func__);
 		return -EINVAL;
 	}

--
1.7.2.3

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