rdpdr_check_fds(fd_set * rfds, fd_set * wfds, RD_BOOL timed_out)
{
	fd_set dummy;


	FD_ZERO(&dummy);


	/* fist check event queue only,
	   any serial wait event must be done before read block will be sent
	 */

	_rdpdr_check_fds(&dummy, &dummy, False);
	_rdpdr_check_fds(rfds, wfds, timed_out);
}

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.