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westwooddemuxer: Fix 1gb alloc

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Fixes Ticket765
Bug Found by: Diana Elena Muscalu

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-15 20:25:50 +01:00
parent 6f2054c589
commit f68b19fc28
1 changed files with 7 additions and 0 deletions
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7
libavformat/westwood.c
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@ -320,8 +320,15 @@ static int wsvqa_read_packet(AVFormatContext *s,
int skip_byte;
while (avio_read(pb, preamble, VQA_PREAMBLE_SIZE) == VQA_PREAMBLE_SIZE) {
int64_t filesize= avio_size(s->pb);
chunk_type = AV_RB32(&preamble[0]);
chunk_size = AV_RB32(&preamble[4]);
if(chunk_size > filesize){
av_log(s, AV_LOG_ERROR, "Chunk with size %d truncated\n", chunk_size);
chunk_size= filesize;
}
skip_byte = chunk_size & 0x01;
if ((chunk_type == SND1_TAG) || (chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {