diff --git a/libavformat/siff.c b/libavformat/siff.c
index c8b68abe30..8da6c2f67a 100644
--- a/libavformat/siff.c
+++ b/libavformat/siff.c
@@ -216,7 +216,10 @@ static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
             AV_WL16(pkt->data, c->flags);
             if (c->gmcsize)
                 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
-            avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
+            if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
+                av_free_packet(pkt);
+                return AVERROR_INVALIDDATA;
+            }
             pkt->stream_index = 0;
             c->curstrm = -1;
         }else{