diff --git a/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/mvdec.c b/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/mvdec.c
index 5525233db..224d56537 100644
--- a/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/mvdec.c
+++ b/contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/mvdec.c
@@ -306,6 +306,8 @@ static int mv_read_header(AVFormatContext *avctx)
             uint32_t pos   = avio_rb32(pb);
             uint32_t asize = avio_rb32(pb);
             uint32_t vsize = avio_rb32(pb);
+            if (avio_feof(pb))
+                return AVERROR_INVALIDDATA;
             avio_skip(pb, 8);
             av_add_index_entry(ast, pos,         timestamp, asize, 0, AVINDEX_KEYFRAME);
             av_add_index_entry(vst, pos + asize, i,         vsize, 0, AVINDEX_KEYFRAME);