[FFmpeg-cvslog] Fixed segfault with wavpack decoder on corrupted decorrelation terms sub-blocks .
Laurent Aimar
git at videolan.org
Thu Sep 22 01:17:27 CEST 2011
ffmpeg | branch: release/0.8 | Laurent Aimar <fenrir at videolan.org> | Wed Sep 7 21:43:03 2011 +0200| [c11d360ebc86e994e223b646b62f471b0fbbe8d3] | committer: Anton Khirnov
Fixed segfault with wavpack decoder on corrupted decorrelation terms sub-blocks.
Signed-off-by: Martin Storsjö <martin at martin.st>
(cherry picked from commit 8bfea4ab4e2cb32bc7bf6f697ee30a238c65d296)
Signed-off-by: Anton Khirnov <anton at khirnov.net>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c11d360ebc86e994e223b646b62f471b0fbbe8d3
---
libavcodec/wavpack.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index f614c7a..155633f 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -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;
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