1 files changed, 6 insertions, 1 deletions
diff --git a/ext/ivorbis/vorbis.c b/ext/ivorbis/vorbis.c
index 4a95c14e..65ef4b06 100644
--- a/ext/ivorbis/vorbis.c
+++ b/ext/ivorbis/vorbis.c
@@ -83,7 +83,12 @@ static GstTypeDefinition vorbisdefinition = {
 static GstCaps* 
 vorbis_type_find (GstBuffer *buf, gpointer private) 
 {
-  guint32 head = GUINT32_FROM_BE (*((guint32 *)GST_BUFFER_DATA (buf)));
+  guint32 head;
+    
+  if (GST_BUFFER_SIZE (buf) < 4)
+    return NULL;
+
+  head = GUINT32_FROM_BE (*((guint32 *)GST_BUFFER_DATA (buf)));
 
   if (head  != 0x4F676753)
     return NULL;