[FFmpeg-devel] [PATCH 1/3] avformat/flvdec: Set last_ts before its timestamp is lost in ff_buffer_packet()

[Michael Niedermayer]

Fixes: signed integer overflow: -9223372036315799519 + -9223372036854775807 cannot be represented in type 'long'
Fixes: 398356258/clusterfuzz-testcase-minimized-ffmpeg_dem_LIVE_FLV_fuzzer-4905723095482368

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavformat/flvdec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index b90ed34b1c5..8af317f3cc9 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -1852,6 +1852,7 @@ retry_duration:
             stream_type == FLV_STREAM_TYPE_DATA)
             pkt->flags |= AV_PKT_FLAG_KEY;
 
+        flv->last_ts = pkt->dts;
         ret = ff_buffer_packet(s, pkt);
         if (ret < 0)
             return ret;
@@ -1906,8 +1907,6 @@ leave:
         }
     }
 
-    if (ret >= 0)
-        flv->last_ts = pkt->dts;
 
     return ret ? ret : res;
 }
-- 
2.49.0