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avformat/dsfdec: check if number of channels is <= 0 

Fixes FPE bellow.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-04-30 17:50:22 +02:00
parent 10d48c63b2
commit d171cd076f
1 changed files with 3 additions and 0 deletions
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3
libavformat/dsfdec.c
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@ -107,6 +107,9 @@ static int dsf_read_header(AVFormatContext *s)
st->codecpar->channels = avio_rl32(pb);
st->codecpar->sample_rate = avio_rl32(pb) / 8;
if (st->codecpar->channels <= 0)
return AVERROR_INVALIDDATA;
switch(avio_rl32(pb)) {
case 1: st->codecpar->codec_id = AV_CODEC_ID_DSD_LSBF_PLANAR; break;
case 8: st->codecpar->codec_id = AV_CODEC_ID_DSD_MSBF_PLANAR; break;