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mov: prevent overflow during bit rate calculation

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun
2016-12-14 01:53:23 +01:00
parent baba9c6aef
commit 076c3a9fa2
1 changed files with 14 additions and 1 deletions
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15
libavformat/mov.c
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@@ -5887,16 +5887,29 @@ static int mov_read_header(AVFormatContext *s)
for (i = 0; i < s->nb_streams; i++) { for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i]; AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data; MOVStreamContext *sc = st->priv_data;
if (st->duration > 0) if (st->duration > 0) {
if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
sc->data_size, sc->time_scale);
mov_read_close(s);
return AVERROR_INVALIDDATA;
}
st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration; st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->duration;
} }
} }
}
if (mov->use_mfra_for > 0) { if (mov->use_mfra_for > 0) {
for (i = 0; i < s->nb_streams; i++) { for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i]; AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data; MOVStreamContext *sc = st->priv_data;
if (sc->duration_for_fps > 0) { if (sc->duration_for_fps > 0) {
if (sc->data_size > INT64_MAX / sc->time_scale / 8) {
av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %"PRId64" * 8 * %d\n",
sc->data_size, sc->time_scale);
mov_read_close(s);
return AVERROR_INVALIDDATA;
}
st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale / st->codecpar->bit_rate = sc->data_size * 8 * sc->time_scale /
sc->duration_for_fps; sc->duration_for_fps;
} }