[FFmpeg-cvslog] avformat/concatdec: check that there's extradata before trying to copy it

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Thu Nov 17 10:52:33 2022 -0300| [63db6a02a78e6f1a3657d6287ea870ce10d54d9e] | committer: James Almer

avformat/concatdec: check that there's extradata before trying to copy it

The first argument for memcpy must not be NULL.

Signed-off-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=63db6a02a78e6f1a3657d6287ea870ce10d54d9e
---

 libavformat/concatdec.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 7748c20b6d..5d4f67d0ac 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -181,8 +181,9 @@ static int copy_stream_props(AVStream *st, AVStream *source_st)
             if (ret < 0)
                 return ret;
         }
-        memcpy(st->codecpar->extradata, source_st->codecpar->extradata,
-               source_st->codecpar->extradata_size);
+        if (source_st->codecpar->extradata_size)
+            memcpy(st->codecpar->extradata, source_st->codecpar->extradata,
+                   source_st->codecpar->extradata_size);
         return 0;
     }
     if ((ret = avcodec_parameters_copy(st->codecpar, source_st->codecpar)) < 0)