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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 8bfea4ab4e)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Laurent Aimar
2011-09-07 21:43:03 +02:00
committed by Anton Khirnov
parent dd6334a1e4
commit c11d360ebc
1 changed files with 3 additions and 2 deletions
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libavcodec/wavpack.c
+3 -2
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@@ -862,12 +862,13 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
}
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;