avcodec/vmdvideo: Check len before using it in method 3
[ffmpeg.git] / libavcodec / vmdvideo.c
index fa0fbe3..a2ba1c9 100644 (file)
@@ -339,6 +339,9 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
                         ofs += slen;
                         bytestream2_skip(&gb, len);
                     } else {
+                        if (ofs + len > frame_width ||
+                            bytestream2_get_bytes_left(&gb) < len)
+                            return AVERROR_INVALIDDATA;
                         bytestream2_get_buffer(&gb, &dp[ofs], len);
                         ofs += len;
                     }