static void vdi_port_read_buf_unref(VDIReadBuf *buf)
{
    if (!--buf->refs) {
        ring_add(&reds->agent_state.read_bufs, &buf->link);

        /* read_one_msg_from_vdi_port may have never completed because the read_bufs
        ring was empty. So we call it again so it can complete its work if
        necessary. Note that since we can be called from spice_char_device_wakeup
        this can cause recursion, but we have protection for that */
        if (reds->agent_state.base) {
            spice_char_device_wakeup(reds->agent_state.base);
        }
    }
}

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.