limit_bandwidth (wgint bytes, struct ptimer *timer)
{
  double delta_t = ptimer_read (timer) - limit_data.chunk_start;
  double expected;

  limit_data.chunk_bytes += bytes;

  /* Calculate the amount of time we expect downloading the chunk
     should take.  If in reality it took less time, sleep to
     compensate for the difference.  */
  expected = (double) limit_data.chunk_bytes / opt.limit_rate;

  if (expected > delta_t)
    {
      double slp = expected - delta_t + limit_data.sleep_adjust;
      double t0, t1;
      if (slp < 0.2)
        {
          DEBUGP (("deferring a %.2f ms sleep (%s/%.2f).\n",
                   slp * 1000, number_to_static_string (limit_data.chunk_bytes),
                   delta_t));
          return;
        }
      DEBUGP (("\nsleeping %.2f ms for %s bytes, adjust %.2f ms\n",
               slp * 1000, number_to_static_string (limit_data.chunk_bytes),
               limit_data.sleep_adjust));

      t0 = ptimer_read (timer);
      xsleep (slp);
      t1 = ptimer_measure (timer);

      /* Due to scheduling, we probably slept slightly longer (or
         shorter) than desired.  Calculate the difference between the
         desired and the actual sleep, and adjust the next sleep by
         that amount.  */
      limit_data.sleep_adjust = slp - (t1 - t0);
      /* If sleep_adjust is very large, it's likely due to suspension
         and not clock inaccuracy.  Don't enforce those.  */
      if (limit_data.sleep_adjust > 0.5)
        limit_data.sleep_adjust = 0.5;
      else if (limit_data.sleep_adjust < -0.5)
        limit_data.sleep_adjust = -0.5;
    }

  limit_data.chunk_bytes = 0;
  limit_data.chunk_start = ptimer_read (timer);
}

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.