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avformat/filmstripdec: Fix several integer overflows 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-10-27 22:56:04 +01:00
parent 76b9043e90
commit 9612dcd6b2
1 changed files with 7 additions and 1 deletions
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8
libavformat/filmstripdec.c
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@ -67,6 +67,12 @@ static int read_header(AVFormatContext *s)
st->codec->width = avio_rb16(pb);
st->codec->height = avio_rb16(pb);
film->leading = avio_rb16(pb);
if (st->codec->width * 4LL * st->codec->height >= INT_MAX) {
av_log(s, AV_LOG_ERROR, "dimensions too large\n");
return AVERROR_PATCHWELCOME;
}
avpriv_set_pts_info(st, 64, 1, avio_rb16(pb));
avio_seek(pb, 0, SEEK_SET);
@ -82,7 +88,7 @@ static int read_packet(AVFormatContext *s,
if (avio_feof(s->pb))
return AVERROR(EIO);
pkt->dts = avio_tell(s->pb) / (st->codec->width * (st->codec->height + film->leading) * 4);
pkt->dts = avio_tell(s->pb) / (st->codec->width * (int64_t)(st->codec->height + film->leading) * 4);
pkt->size = av_get_packet(s->pb, pkt, st->codec->width * st->codec->height * 4);
avio_skip(s->pb, st->codec->width * (int64_t) film->leading * 4);
if (pkt->size < 0)