static void bdrv_io_limits_intercept(BlockDriverState *bs,
                                     unsigned int bytes,
                                     bool is_write)
{
    /* does this io must wait */
    bool must_wait = throttle_schedule_timer(&bs->throttle_state, is_write);

    /* if must wait or any request of this type throttled queue the IO */
    if (must_wait ||
        !qemu_co_queue_empty(&bs->throttled_reqs[is_write])) {
        qemu_co_queue_wait(&bs->throttled_reqs[is_write]);
    }

    /* the IO will be executed, do the accounting */
    throttle_account(&bs->throttle_state, is_write, bytes);


    /* if the next request must wait -> do nothing */
    if (throttle_schedule_timer(&bs->throttle_state, is_write)) {
        return;
    }

    /* else queue next request for execution */
    qemu_co_queue_next(&bs->throttled_reqs[is_write]);
}

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.