 static int uas_switch_interface(struct usb_device *udev,
 				struct usb_interface *intf)
 {
	int alt;
 
 	alt = uas_find_uas_alt_setting(intf);
	if (alt < 0)
		return alt;
 
	return usb_set_interface(udev,
			intf->altsetting[0].desc.bInterfaceNumber, alt);
 }

The product reads data past the end, or before the beginning, of the intended buffer.