[FFmpeg-devel] [PATCH 3/3] avformat/mov: Check creation_time for overflow

[Michael Niedermayer]

Fixes integer overflow
Fixes: 701640

Found-by: Found-by: Thomas Guilbert <tguilbert at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavformat/mov.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index c9d076ee21..9c1c36c4be 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);
     }
 }
-- 
2.11.0