asfdemux: Add sanity check for asf_stream_audio

We should have enough bytes for the specified codec_data

https://bugzilla.gnome.org/show_bug.cgi?id=775070

diff --git a/gst/asfdemux/gstasfdemux.c b/gst/asfdemux/gstasfdemux.c
index 8d9dfef..e1d6273 100644 (file)
--- a/gst/asfdemux/gstasfdemux.c
+++ b/gst/asfdemux/gstasfdemux.c
@@ -2507,6 +2507,11 @@ gst_asf_demux_get_stream_audio (asf_stream_audio * audio, guint8 ** p_data,
   audio->word_size = gst_asf_demux_get_uint16 (p_data, p_size);
   /* Codec specific data size */
   audio->size = gst_asf_demux_get_uint16 (p_data, p_size);
+  if (audio->size > *p_size) {
+    GST_WARNING ("Corrupted audio codec_data (should be at least %u bytes, is %"
+        G_GUINT64_FORMAT " long)", audio->size, *p_size);
+    return FALSE;
+  }
   return TRUE;
 }