static int rtp_new_av_stream(HTTPContext *c,
                             int stream_index, struct sockaddr_in *dest_addr,
                             HTTPContext *rtsp_c)
{
    AVFormatContext *ctx;
    AVStream *st;
    char *ipaddr;
    URLContext *h = NULL;
    uint8_t *dummy_buf;
    int max_packet_size;
    void *st_internal;

    /* now we can open the relevant output stream */
    ctx = avformat_alloc_context();
    if (!ctx)
        return -1;
    ctx->oformat = av_guess_format("rtp", NULL, NULL);

    st = avformat_new_stream(ctx, NULL);
    if (!st)
        goto fail;

    st_internal = st->internal;

    if (!c->stream->feed ||
        c->stream->feed == c->stream)
        unlayer_stream(st, c->stream->streams[stream_index]);
    else
        unlayer_stream(st,
               c->stream->feed->streams[c->stream->feed_streams[stream_index]]);
    av_assert0(st->priv_data == NULL);
    av_assert0(st->internal == st_internal);

    /* build destination RTP address */
    ipaddr = inet_ntoa(dest_addr->sin_addr);

    switch(c->rtp_protocol) {
    case RTSP_LOWER_TRANSPORT_UDP:
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
        /* RTP/UDP case */

        /* XXX: also pass as parameter to function ? */
        if (c->stream->is_multicast) {
            int ttl;
            ttl = c->stream->multicast_ttl;
            if (!ttl)
                ttl = 16;
            snprintf(ctx->filename, sizeof(ctx->filename),
                     "rtp://%s:%d?multicast=1&ttl=%d",
                     ipaddr, ntohs(dest_addr->sin_port), ttl);
        } else {
            snprintf(ctx->filename, sizeof(ctx->filename),
                     "rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
        }

        if (ffurl_open(&h, ctx->filename, AVIO_FLAG_WRITE, NULL, NULL) < 0)
            goto fail;
        c->rtp_handles[stream_index] = h;
        max_packet_size = h->max_packet_size;
        break;
    case RTSP_LOWER_TRANSPORT_TCP:
        /* RTP/TCP case */
        c->rtsp_c = rtsp_c;
        max_packet_size = RTSP_TCP_MAX_PACKET_SIZE;
        break;
    default:
        goto fail;
    }

    http_log("%s:%d - - \"PLAY %s/streamid=%d %s\"\n",
             ipaddr, ntohs(dest_addr->sin_port),
             c->stream->filename, stream_index, c->protocol);

    /* normally, no packets should be output here, but the packet size may
     * be checked */
    if (ffio_open_dyn_packet_buf(&ctx->pb, max_packet_size) < 0)
        /* XXX: close stream */
        goto fail;

    if (avformat_write_header(ctx, NULL) < 0) {
    fail:
        if (h)
            ffurl_close(h);
        av_free(st);
        av_free(ctx);
        return -1;
    }
    avio_close_dyn_buf(ctx->pb, &dummy_buf);
    ctx->pb = NULL;
    av_free(dummy_buf);

    c->rtp_ctx[stream_index] = ctx;
    return 0;
}

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.