static int mov_read_sbgp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
    AVStream *st;
    MOVStreamContext *sc;
    unsigned int i, entries;
    uint8_t version;
    uint32_t grouping_type;

    if (c->fc->nb_streams < 1)
        return 0;
    st = c->fc->streams[c->fc->nb_streams-1];
    sc = st->priv_data;

    version = avio_r8(pb); /* version */
    avio_rb24(pb); /* flags */
    grouping_type = avio_rl32(pb);
    if (grouping_type != MKTAG( 'r','a','p',' '))
        return 0; /* only support 'rap ' grouping */
    if (version == 1)
        avio_rb32(pb); /* grouping_type_parameter */

    entries = avio_rb32(pb);
    if (!entries)
        return 0;
    if (sc->rap_group)
        av_log(c->fc, AV_LOG_WARNING, "Duplicated SBGP atom\n");
    av_free(sc->rap_group);
    sc->rap_group_count = 0;
    sc->rap_group = av_malloc_array(entries, sizeof(*sc->rap_group));
    if (!sc->rap_group)
        return AVERROR(ENOMEM);

    for (i = 0; i < entries && !pb->eof_reached; i++) {
        sc->rap_group[i].count = avio_rb32(pb); /* sample_count */
        sc->rap_group[i].index = avio_rb32(pb); /* group_description_index */
    }

    sc->rap_group_count = i;

    return pb->eof_reached ? AVERROR_EOF : 0;
}

The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.