linux-kernel - [PATCH v2] arm: mach-omap2: potential NULL dereference

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Message-ID: <20110119125721.GA9203@albatros>
Date:	Wed, 19 Jan 2011 15:57:22 +0300
From:	Vasiliy Kulikov <segoon@...nwall.com>
To:	linux-kernel@...r.kernel.org
Cc:	walter harms <wharms@....de>, kernel-janitors@...r.kernel.org,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2] arm: mach-omap2: potential NULL dereference

kzalloc() may fail, if so return -ENOMEM.  Also Walter Harms suggested
to use kasprintf() instead of kzalloc+strcpy+strcat.

Signed-off-by: Vasiliy Kulikov <segoon@...nwall.com>
---
 Cannot compile this driver, so it is not tested at all.

 arch/arm/mach-omap2/smartreflex.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 77ecebf..697d8d4 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -260,9 +260,11 @@ static int sr_late_init(struct omap_sr *sr_info)
 	if (sr_class->class_type == SR_CLASS2 &&
 		sr_class->notify_flags && sr_info->irq) {
 
-		name = kzalloc(SMARTREFLEX_NAME_LEN + 1, GFP_KERNEL);
-		strcpy(name, "sr_");
-		strcat(name, sr_info->voltdm->name);
+		name = kasprintf(GFP_KERNEL, "sr_%s", sr_info->voltdm->name);
+		if (name == NULL) {
+			ret = -ENOMEM;
+			goto error;
+		}
 		ret = request_irq(sr_info->irq, sr_interrupt,
 				0, name, (void *)sr_info);
 		if (ret)
-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
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