1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 056d6fbcad..056f1f26ee 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -950,6 +950,9 @@ static int read_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int
         AV_WL32(dst+4, skip_end);
     }
 
+    if (avio_tell(bc) >= maxpos)
+        return AVERROR_INVALIDDATA;
+
     return 0;
 }