linux-kernel - [03/29] Staging: asus_oled: fix oops in 2.6.32.2

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Message-Id: <20100123001110.617642203@mini.kroah.org>
Date:	Fri, 22 Jan 2010 16:09:47 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Eugeni Dodonov <eugeni@...driva.com>
Subject: [03/29] Staging: asus_oled: fix oops in 2.6.32.2

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Eugeni Dodonov <eugeni@...driva.com>

commit 20633bf0141c5e93e3396770d5eb7d200ee4068a upstream.

After updating to 2.6.32 kernel, I started experiencing Oopses caused by
the asus_oled module. After quick investigation, I wrapped this simple
patch which fixes an Oops in by asus_oled module on 2.6.32.2 kernel,
caused by incorrect usage of strict_strtoul function call within
set_enabled and set_disabled functions. This can be triggered by simple
running the userspace client for asus_old (e.g., 'asusoled -e' or
'asusoled -d').

Signed-off-by: Eugeni Dodonov <eugeni@...driva.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/staging/asus_oled/asus_oled.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/drivers/staging/asus_oled/asus_oled.c
+++ b/drivers/staging/asus_oled/asus_oled.c
@@ -194,9 +194,11 @@ static ssize_t set_enabled(struct device
 {
 	struct usb_interface *intf = to_usb_interface(dev);
 	struct asus_oled_dev *odev = usb_get_intfdata(intf);
-	int temp = strict_strtoul(buf, 10, NULL);
+	unsigned long value;
+	if (strict_strtoul(buf, 10, &value))
+		return -EINVAL;
 
-	enable_oled(odev, temp);
+	enable_oled(odev, value);
 
 	return count;
 }
@@ -207,10 +209,12 @@ static ssize_t class_set_enabled(struct 
 {
 	struct asus_oled_dev *odev =
 		(struct asus_oled_dev *) dev_get_drvdata(device);
+	unsigned long value;
 
-	int temp = strict_strtoul(buf, 10, NULL);
+	if (strict_strtoul(buf, 10, &value))
+		return -EINVAL;
 
-	enable_oled(odev, temp);
+	enable_oled(odev, value);
 
 	return count;
 }


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