[FFmpeg-cvslog] avcodec/utils: Use 64bit for aspect ratio calculation in avcodec_string()

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sat Nov 28 17:26:05 2015 +0100| [fe89682d7c61fde1b121209da6ebc7aa27449590] | committer: Michael Niedermayer

avcodec/utils: Use 64bit for aspect ratio calculation in avcodec_string()

Fixes integer overflow
Fixes: 3a45b2ae02f2cf12b7bd99543cdcdae5/asan_heap-oob_1dff502_8022_899f75e1e81046ebd7b6c2394a1419f4.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 4f03bebc79f76df3a3e5bb9e1bc32baabfb7797c)

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fe89682d7c61fde1b121209da6ebc7aa27449590
---

 libavcodec/utils.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 735e71a..2037667 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -3178,8 +3178,8 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
 
             if (enc->sample_aspect_ratio.num) {
                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
-                          enc->width * enc->sample_aspect_ratio.num,
-                          enc->height * enc->sample_aspect_ratio.den,
+                          enc->width * (int64_t)enc->sample_aspect_ratio.num,
+                          enc->height * (int64_t)enc->sample_aspect_ratio.den,
                           1024 * 1024);
                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
                          " [SAR %d:%d DAR %d:%d]",