[FFmpeg-cvslog] avformat/sbgdec: clamp end_ts

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Sep 18 16:29:37 2022 +0200| [981f5e46afa3673dfa43eb2bf5017680d5df25dd] | committer: Michael Niedermayer

avformat/sbgdec: clamp end_ts

Fixes: signed integer overflow: 9223372036851135042 + 15666854 cannot be represented in type 'long'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-6573717339111424

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=981f5e46afa3673dfa43eb2bf5017680d5df25dd
---

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

diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c
index 8a6d679056..4cd12347e7 100644
--- a/libavformat/sbgdec.c
+++ b/libavformat/sbgdec.c
@@ -1478,7 +1478,7 @@ static int sbg_read_packet(AVFormatContext *avf, AVPacket *packet)
     int ret;
 
     ts = ffstream(avf->streams[0])->cur_dts;
-    end_ts = ts + avf->streams[0]->codecpar->frame_size;
+    end_ts = av_sat_add64(ts, avf->streams[0]->codecpar->frame_size);
     if (avf->streams[0]->duration != AV_NOPTS_VALUE)
         end_ts = FFMIN(avf->streams[0]->start_time + avf->streams[0]->duration,
                        end_ts);