From 2cd1ea4411d0808559a942ff3fa4e637f9c9a9c8 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 29 Apr 2010 14:15:32 -0400
Subject: [PATCH] [ft] Disallow getting the entire font data with tag=0

---
 src/hb-ft.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hb-ft.c b/src/hb-ft.c
index 2174da5bc..f245a0404 100644
--- a/src/hb-ft.c
+++ b/src/hb-ft.c
@@ -152,6 +152,9 @@ _get_table  (hb_tag_t tag, void *user_data)
   FT_ULong  length = 0;
   FT_Error error;
 
+  if (HB_UNLIKELY (tag == HB_TAG_NONE))
+    return hb_blob_create_empty ();
+
   error = FT_Load_Sfnt_Table (ft_face, tag, 0, NULL, &length);
   if (error)
     return hb_blob_create_empty ();