[FFmpeg-cvslog] avformat/avs: Check if return code is representable

[Michael Niedermayer]

ffmpeg | branch: release/4.2 | Michael Niedermayer <michael at niedermayer.cc> | Wed Sep 20 01:32:56 2023 +0200| [d8220c4c08c441d4c620635ce1f7a91eda915586] | committer: Michael Niedermayer

avformat/avs: Check if return code is representable

Fixes: leak
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_dem_AVS_fuzzer-6738814988320768

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 52d666edec73c834c60811e330f86a7cf1d916da)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d8220c4c08c441d4c620635ce1f7a91eda915586
---

 libavformat/avs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/avs.c b/libavformat/avs.c
index 240193ea4f..c846265c50 100644
--- a/libavformat/avs.c
+++ b/libavformat/avs.c
@@ -141,6 +141,10 @@ static int avs_read_audio_packet(AVFormatContext * s, AVPacket * pkt)
         return 0;    /* this indicate EOS */
     if (ret < 0)
         return ret;
+    if (size != (int)size) {
+        av_packet_unref(pkt);
+        return AVERROR(EDOM);
+    }
 
     pkt->stream_index = avs->st_audio->index;
     pkt->flags |= AV_PKT_FLAG_KEY;