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Fixed segfault with wavpack decoder on corrupted decorrelation terms sub-blocks.

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Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 8bfea4ab4e2cb32bc7bf6f697ee30a238c65d296)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Laurent Aimar 2011-09-07 21:43:03 +02:00 committed by Reinhard Tartler
parent 7f163e5a87
commit 5394cdf775
1 changed files with 3 additions and 2 deletions
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5
libavcodec/wavpack.c
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@ -776,12 +776,13 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
}
switch(id & WP_IDF_MASK){
case WP_ID_DECTERMS:
s->terms = size;
if(s->terms > MAX_TERMS){
if(size > MAX_TERMS){
av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n");
s->terms = 0;
buf += ssize;
continue;
}
s->terms = size;
for(i = 0; i < s->terms; i++) {
s->decorr[s->terms - i - 1].value = (*buf & 0x1F) - 5;
s->decorr[s->terms - i - 1].delta = *buf >> 5;