static int bluebird_patch_dvico_firmware_download(struct usb_device *udev,
						  const struct firmware *fw)
{
	int pos;

	for (pos = 0; pos < ARRAY_SIZE(dvico_firmware_id_offsets); pos++) {
		int idoff = dvico_firmware_id_offsets[pos];

		if (fw->size < idoff + 4)
			continue;

		if (fw->data[idoff] == (USB_VID_DVICO & 0xff) &&
		    fw->data[idoff + 1] == USB_VID_DVICO >> 8) {
			struct firmware new_fw;
			u8 *new_fw_data = vmalloc(fw->size);
			int ret;

			if (!new_fw_data)
				return -ENOMEM;

			memcpy(new_fw_data, fw->data, fw->size);
			new_fw.size = fw->size;
			new_fw.data = new_fw_data;

			new_fw_data[idoff + 2] =
				le16_to_cpu(udev->descriptor.idProduct) + 1;
			new_fw_data[idoff + 3] =
				le16_to_cpu(udev->descriptor.idProduct) >> 8;

			ret = usb_cypress_load_firmware(udev, &new_fw,
							CYPRESS_FX2);
			vfree(new_fw_data);
			return ret;
		}
	}

	return -EINVAL;
}

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.