static struct usb_interface_assoc_descriptor *find_iad(struct usb_device *dev,
						struct usb_host_config *config,
						u8 inum)
{
	struct usb_interface_assoc_descriptor *retval = NULL;
	struct usb_interface_assoc_descriptor *intf_assoc;
	int first_intf;
	int last_intf;
	int i;

	for (i = 0; (i < USB_MAXIADS && config->intf_assoc[i]); i++) {
		intf_assoc = config->intf_assoc[i];
		if (intf_assoc->bInterfaceCount == 0)
			continue;

		first_intf = intf_assoc->bFirstInterface;
		last_intf = first_intf + (intf_assoc->bInterfaceCount - 1);
		if (inum >= first_intf && inum <= last_intf) {
			if (!retval)
				retval = intf_assoc;
			else
				dev_err(&dev->dev, "Interface #%d referenced"
					" by multiple IADs\n", inum);
		}
	}

	return retval;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.