[FFmpeg-cvslog] avcodec/jpeg2000dec: Check that coords match before applying ICT

[Michael Niedermayer]

ffmpeg | branch: release/2.2 | Michael Niedermayer <michaelni at gmx.at> | Tue Jun  9 00:37:26 2015 +0200| [4cb077793d00a2f6b8510eab3a7bb49af74f7c57] | 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>
(cherry picked from commit 12ba1b2b4d5592c0e27b0fcc83db929e8d6a8eee)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4cb077793d00a2f6b8510eab3a7bb49af74f7c57
---

 libavcodec/jpeg2000dec.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 845feb6..8e46616 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -1159,11 +1159,16 @@ static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
     int32_t *src[3],  i0,  i1,  i2;
     float   *srcf[3], i0f, i1f, i2f;
 
-    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)