diff --git a/libavformat/iff.c b/libavformat/iff.c
index fb76aed4c3..a70184f105 100644
--- a/libavformat/iff.c
+++ b/libavformat/iff.c
@@ -223,6 +223,9 @@ static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
         uint64_t orig_pos = avio_tell(pb);
         const char * metadata_tag = NULL;
 
+        if (size >= INT64_MAX)
+            return AVERROR_INVALIDDATA;
+
         switch(tag) {
         case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
         case MKTAG('D','I','T','I'): metadata_tag = "title";  break;