ffmpeg | branch: release/2.5 | Michael Niedermayer <mich...@niedermayer.cc> |
Sun Nov 15 21:17:05 2015 +0100| [cd7598fb1bbacb3f1d95bd7e36d51cba3910e876] |
committer: Michael Niedermayer
avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
(cherry picked from commit 65d3359fb366ea265a8468d76a111cb7352f0b55)
Conflicts:
libavcodec/jpeg2000dec.c
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cd7598fb1bbacb3f1d95bd7e36d51cba3910e876
---
libavcodec/jpeg2000dec.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index f926ab8..ae0c9bb 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -690,10 +690,10 @@ static int init_tile(Jpeg2000DecoderContext *s, int
tileno)
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int ret; // global bandno
- comp->coord_o[0][0] = av_clip(tilex * s->tile_width +
s->tile_offset_x, s->image_offset_x, s->width);
- comp->coord_o[0][1] = av_clip((tilex + 1) * s->tile_width +
s->tile_offset_x, s->image_offset_x, s->width);
- comp->coord_o[1][0] = av_clip(tiley * s->tile_height +
s->tile_offset_y, s->image_offset_y, s->height);
- comp->coord_o[1][1] = av_clip((tiley + 1) * s->tile_height +
s->tile_offset_y, s->image_offset_y, s->height);
+ comp->coord_o[0][0] = av_clip(tilex * (int64_t)s->tile_width +
s->tile_offset_x, s->image_offset_x, s->width);
+ comp->coord_o[0][1] = av_clip((tilex + 1) * (int64_t)s->tile_width +
s->tile_offset_x, s->image_offset_x, s->width);
+ comp->coord_o[1][0] = av_clip(tiley * (int64_t)s->tile_height +
s->tile_offset_y, s->image_offset_y, s->height);
+ comp->coord_o[1][1] = av_clip((tiley + 1) * (int64_t)s->tile_height +
s->tile_offset_y, s->image_offset_y, s->height);
comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0],
s->reduction_factor);
comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1],
s->reduction_factor);
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