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eatgv: check vector_bits 

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-15 15:29:50 +02:00
parent 34123ab979
commit b962932cba
1 changed files with 5 additions and 0 deletions
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5
libavcodec/eatgv.c
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@ -157,6 +157,11 @@ static int tgv_decode_inter(TgvContext * s, const uint8_t *buf, const uint8_t *b
vector_bits = AV_RL16(&buf[6]);
buf += 12;
if (vector_bits > MIN_CACHE_BITS || !vector_bits) {
av_log(s->avctx, AV_LOG_ERROR, "vector_bits %d invalid\n", vector_bits);
return AVERROR_INVALIDDATA;
}
/* allocate codebook buffers as necessary */
if (num_mvs > s->num_mvs) {
s->mv_codebook = av_realloc(s->mv_codebook, num_mvs*2*sizeof(int));