[FFmpeg-cvslog] avcodec/jpeg2000dec: Check that coords match before applying ICT
Michael Niedermayer
git at videolan.org
Tue Jun 9 01:02:41 CEST 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Jun 9 00:37:26 2015 +0200| [12ba1b2b4d5592c0e27b0fcc83db929e8d6a8eee] | committer: Michael Niedermayer
avcodec/jpeg2000dec: Check that coords match before applying ICT
This avoid potential out of array accesses
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=12ba1b2b4d5592c0e27b0fcc83db929e8d6a8eee
---
libavcodec/jpeg2000dec.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 6587e7d..ee70bde 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -1148,11 +1148,16 @@ static inline void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
int i, csize = 1;
void *src[3];
- for (i = 1; i < 3; i++)
+ for (i = 1; i < 3; i++) {
if (tile->codsty[0].transform != tile->codsty[i].transform) {
av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n");
return;
}
+ if (memcmp(tile->comp[0].coord, tile->comp[i].coord, sizeof(tile->comp[0].coord))) {
+ av_log(s->avctx, AV_LOG_ERROR, "Coords mismatch, MCT not supported\n");
+ return;
+ }
+ }
for (i = 0; i < 3; i++)
if (tile->codsty[0].transform == FF_DWT97)
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