[FFmpeg-cvslog] avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Nov 15 21:17:05 2015 +0100| [65d3359fb366ea265a8468d76a111cb7352f0b55] | committer: Michael Niedermayer

avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=65d3359fb366ea265a8468d76a111cb7352f0b55
---

 libavcodec/jpeg2000dec.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 06cf4b7..4604e73 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -830,10 +830,10 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno)
     if (!tile->comp)
         return AVERROR(ENOMEM);
 
-    tile->coord[0][0] = av_clip(tilex       * s->tile_width  + s->tile_offset_x, s->image_offset_x, s->width);
-    tile->coord[0][1] = av_clip((tilex + 1) * s->tile_width  + s->tile_offset_x, s->image_offset_x, s->width);
-    tile->coord[1][0] = av_clip(tiley       * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
-    tile->coord[1][1] = av_clip((tiley + 1) * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
+    tile->coord[0][0] = av_clip(tilex       * (int64_t)s->tile_width  + s->tile_offset_x, s->image_offset_x, s->width);
+    tile->coord[0][1] = av_clip((tilex + 1) * (int64_t)s->tile_width  + s->tile_offset_x, s->image_offset_x, s->width);
+    tile->coord[1][0] = av_clip(tiley       * (int64_t)s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
+    tile->coord[1][1] = av_clip((tiley + 1) * (int64_t)s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
 
     for (compno = 0; compno < s->ncomponents; compno++) {
         Jpeg2000Component *comp = tile->comp + compno;