From 0428b4afdac8d43b938a9fad8e5cdc0a8be53393 Mon Sep 17 00:00:00 2001
From: Edward Hervey <edward@centricular.com>
Date: Thu, 7 Dec 2017 14:52:36 +0100
Subject: [PATCH] typefind: wavpack: limit search in blocksize

The maximum blocksize is 131072 bytes, anything bigger is a corrupted
file.
---
 gst/typefind/gsttypefindfunctions.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gst/typefind/gsttypefindfunctions.c b/gst/typefind/gsttypefindfunctions.c
index f905dda26b..d37d4a4ff3 100644
--- a/gst/typefind/gsttypefindfunctions.c
+++ b/gst/typefind/gsttypefindfunctions.c
@@ -1966,6 +1966,9 @@ wavpack_type_find (GstTypeFind * tf, gpointer unused)
    * work in pull-mode */
   blocksize = GST_READ_UINT32_LE (data + 4);
   GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
+  /* If bigger than maximum allowed blocksize, refuse */
+  if (blocksize > 131072)
+    return;
   count_wv = 0;
   count_wvc = 0;
   offset = 32;