[FFmpeg-cvslog] avformat/mov: Check creation_time for overflow

[git at videolan.org]

ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Sat Apr  1 19:18:36 2017 +0200| [f4400a92f58fbe19b14eb675c241f7df310758fd] | committer: Michael Niedermayer

avformat/mov: Check creation_time for overflow

Fixes integer overflow
Fixes: 701640

Found-by: Found-by: Thomas Guilbert <tguilbert at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 39ee3ddff87a12e108fc4e0d36f756d0ca080472)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f4400a92f58fbe19b14eb675c241f7df310758fd
---

 libavformat/mov.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 1d30a73a44..f2296f8917 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1186,6 +1186,12 @@ static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
     if (time) {
         if(time >= 2082844800)
             time -= 2082844800;  /* seconds between 1904-01-01 and Epoch */
+
+        if ((int64_t)(time * 1000000ULL) / 1000000 != time) {
+            av_log(NULL, AV_LOG_DEBUG, "creation_time is not representable\n");
+            return;
+        }
+
         avpriv_dict_set_timestamp(metadata, "creation_time", time * 1000000);
     }
 }