linux-kernel - [2.6 patch] drivers/usb/input/gtco.c: fix a use-before-check

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Date:	Mon, 19 Mar 2007 10:26:32 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	"Jeremy A. Roberson" <jroberson@...ocalcomp.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net
Subject: [2.6 patch] drivers/usb/input/gtco.c: fix a use-before-check

NULL checks should be before the first dereference.

Spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@...sta.de>

---
--- linux-2.6.21-rc3-mm2/drivers/usb/input/gtco.c.old	2007-03-19 09:29:44.000000000 +0100
+++ linux-2.6.21-rc3-mm2/drivers/usb/input/gtco.c	2007-03-19 09:30:31.000000000 +0100
@@ -1047,13 +1047,10 @@ static void gtco_disconnect(struct usb_i
 
 	/* Grab private device ptr */
 	struct gtco    *device = usb_get_intfdata (interface);
-	struct input_dev *inputdev;
-
-	inputdev = device->inputdevice;
 
 	/* Now reverse all the registration stuff */
 	if (device) {
-		input_unregister_device(inputdev);
+		input_unregister_device(device->inputdevice);
 		usb_kill_urb(device->urbinfo);
 		usb_free_urb(device->urbinfo);
 		usb_buffer_free(device->usbdev, REPORT_MAX_SIZE,

-
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