From eca0f067068020870a429fe91f6329e499390d55 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Mon, 24 Nov 2014 09:22:08 +0000
Subject: [truetype] Fix Savannah bug #43679.

* src/truetype/ttpload.c (tt_face_load_hdmx): Check minimum size of
`record_size'.
---
diff --git a/src/truetype/ttpload.c b/src/truetype/ttpload.c
index 9723a51..9991925 100644
--- a/src/truetype/ttpload.c
+++ b/src/truetype/ttpload.c
@@ -508,9 +508,9 @@
     record_size = FT_NEXT_ULONG( p );
 
     /* The maximum number of bytes in an hdmx device record is the */
-    /* maximum number of glyphs + 2; this is 0xFFFF + 2; this is   */
-    /* the reason why `record_size' is a long (which we read as    */
-    /* unsigned long for convenience).  In practice, two bytes     */
+    /* maximum number of glyphs + 2; this is 0xFFFF + 2, thus      */
+    /* explaining why `record_size' is a long (which we read as    */
+    /* unsigned long for convenience).  In practice, two bytes are */
     /* sufficient to hold the size value.                          */
     /*                                                             */
     /* There are at least two fonts, HANNOM-A and HANNOM-B version */
@@ -522,8 +522,10 @@
       record_size &= 0xFFFFU;
 
     /* The limit for `num_records' is a heuristic value. */
-
-    if ( version != 0 || num_records > 255 || record_size > 0x10001L )
+    if ( version != 0           ||
+         num_records > 255      ||
+         record_size > 0x10001L ||
+         record_size < 4        )
     {
       error = TT_Err_Invalid_File_Format;
       goto Fail;
--
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