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utils: Check for extradata size overflows.

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This commit is contained in:
Alex Converse
2012-01-12 11:12:24 -08:00
parent 81dc6a2a3c
commit 4df30f7114
3 changed files with 13 additions and 1 deletions
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4
libavformat/utils.c
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@@ -2442,9 +2442,11 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
}
if(st->parser && st->parser->parser->split && !st->codec->extradata){
int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
if(i){
if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
st->codec->extradata_size= i;
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}