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genh: prevent overflow during block alignment calculation

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-12-15 02:14:40 +01:00
parent c4a3526b57
commit 5b0ae88ca6
1 changed files with 2 additions and 1 deletions
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3
libavformat/genh.c
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@ -20,6 +20,7 @@
*/
#include "libavutil/intreadwrite.h"
#include "libavcodec/internal.h"
#include "avformat.h"
#include "internal.h"
@ -54,7 +55,7 @@ static int genh_read_header(AVFormatContext *s)
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->channels = avio_rl32(s->pb);
if (st->codecpar->channels <= 0)
if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS)
return AVERROR_INVALIDDATA;
if (st->codecpar->channels == 1)
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;