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asfdec: check extradata size before alloc and read

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-02 20:37:09 +01:00
parent 936eaa89be
commit 80aa89bdff
1 changed files with 1 additions and 1 deletions
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2
libavformat/asfdec.c
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@ -444,7 +444,7 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
tag1 = avio_rl32(pb);
avio_skip(pb, 20);
if (sizeX > 40) {
st->codec->extradata_size = sizeX - 40;
st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
avio_read(pb, st->codec->extradata, st->codec->extradata_size);
}