[FFmpeg-cvslog] avformat/sbgdec: Fixes integer overflow in str_to_time() with hours

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu Jun  6 23:20:49 2019 +0200| [837e9e8898f3110cc6328d35ca77eda4fc630820] | committer: Michael Niedermayer

avformat/sbgdec: Fixes integer overflow in str_to_time() with hours

Fixes: signed integer overflow: 904444 * 3600 cannot be represented in type 'int'
Fixes: 15113/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5764083346833408

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2a0f23b9d647ad84e0351b43ca4b552add00c8dc)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=837e9e8898f3110cc6328d35ca77eda4fc630820
---

 libavformat/sbgdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c
index cbedd120fb..1541836439 100644
--- a/libavformat/sbgdec.c
+++ b/libavformat/sbgdec.c
@@ -197,7 +197,7 @@ static int str_to_time(const char *str, int64_t *rtime)
         if (end > cur + 1)
             cur = end;
     }
-    *rtime = (hours * 3600 + minutes * 60 + seconds) * AV_TIME_BASE;
+    *rtime = (hours * 3600LL + minutes * 60LL + seconds) * AV_TIME_BASE;
     return cur - str;
 }