[FFmpeg-cvslog] avcodec/diracdec: Fix potential integer overflow
Michael Niedermayer
git at videolan.org
Thu May 19 18:15:34 CEST 2016
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu May 19 18:02:53 2016 +0200| [7ecfe4dc363435c81e66dd14881dc0b0ccc73fb1] | committer: Michael Niedermayer
avcodec/diracdec: Fix potential integer overflow
Fixes CID1361948
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7ecfe4dc363435c81e66dd14881dc0b0ccc73fb1
---
libavcodec/diracdec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index 05c7900..1d7bb9b 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -903,8 +903,8 @@ static int decode_lowdelay(DiracContext *s)
} else {
for (slice_y = 0; bufsize > 0 && slice_y < s->num_y; slice_y++) {
for (slice_x = 0; bufsize > 0 && slice_x < s->num_x; slice_x++) {
- bytes = (slice_num+1) * s->lowdelay.bytes.num / s->lowdelay.bytes.den
- - slice_num * s->lowdelay.bytes.num / s->lowdelay.bytes.den;
+ bytes = (slice_num+1) * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den
+ - slice_num * (int64_t)s->lowdelay.bytes.num / s->lowdelay.bytes.den;
slices[slice_num].bytes = bytes;
slices[slice_num].slice_x = slice_x;
slices[slice_num].slice_y = slice_y;
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