PERFORCE change 168019 for review

[Hans Petter Selasky]

http://perforce.freebsd.org/chv.cgi?CH=168019

Change 168019 by hselasky at hselasky_laptop001 on 2009/08/31 18:27:32

	
	USB CORE:
	
	 - Fix NULL-pointer dereference in usb_endpoint_foreach().
	 The function in question is currently not used anywhere.
	 - Report and patch from: Patroklos Argyroudis at census, inc
	
	PR:		usb/138389

Affected files ...

.. //depot/projects/usb/src/sys/dev/usb/usb_device.c#52 edit

Differences ...

==== //depot/projects/usb/src/sys/dev/usb/usb_device.c#52 (text+ko) ====

@@ -367,12 +367,14 @@
 struct usb_endpoint *
 usb_endpoint_foreach(struct usb_device *udev, struct usb_endpoint *ep)
 {
-	struct usb_endpoint *ep_end = udev->endpoints + udev->endpoints_max;
+	struct usb_endpoint *ep_end;
 
 	/* be NULL safe */
 	if (udev == NULL)
 		return (NULL);
 
+	ep_end = udev->endpoints + udev->endpoints_max;
+
 	/* get next endpoint */
 	if (ep == NULL)
 		ep = udev->endpoints;