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vqa: fix double free on corrupted streams 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Laurent Aimar 2011-10-08 23:40:37 +02:00 committed by Michael Niedermayer
parent b226af3910
commit e3123856c7
1 changed files with 1 additions and 3 deletions
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4
libavformat/westwood.c
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@ -277,10 +277,8 @@ static int wsvqa_read_header(AVFormatContext *s,
/* there are 0 or more chunks before the FINF chunk; iterate until
* FINF has been skipped and the file will be ready to be demuxed */
do {
if (avio_read(pb, scratch, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE) {
av_free(st->codec->extradata);
if (avio_read(pb, scratch, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE)
return AVERROR(EIO);
}
chunk_tag = AV_RB32(&scratch[0]);
chunk_size = AV_RB32(&scratch[4]);