linux-kernel - [PATCH] power: gpio-charger: fix potential NULL dereference

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Date:	Fri, 19 Nov 2010 21:41:54 +0300
From:	Vasiliy Kulikov <segoon@...nwall.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Lars-Peter Clausen <lars@...afoo.de>,
	Anton Vorontsov <cbouatmailru@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] power: gpio-charger: fix potential NULL dereference

kzalloc() result is not compared with NULL.  It might lead to NULL
pointer dereference in OOM situation.

Signed-off-by: Vasiliy Kulikov <segoon@...nwall.com>
---
 Compile tested only.

 drivers/power/gpio-charger.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index fccbe99..b07a71c 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -87,6 +87,10 @@ static int __devinit gpio_charger_probe(struct platform_device *pdev)
 	}
 
 	gpio_charger = kzalloc(sizeof(*gpio_charger), GFP_KERNEL);
+	if (!gpio_charger) {
+		dev_err(&pdev->dev, "kzalloc failed\n");
+		return -ENOMEM;
+	}
 
 	charger = &gpio_charger->charger;
 
-- 
1.7.0.4

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