shithub: freetype+ttf2subf

Download patch

ref: 0edf0986f3be570f5bf90ff245a85c1675f5c9a4
parent: 94d540ef7753749700eda06cff6be954cdd5ab6e
author: Werner Lemberg <[email protected]>
date: Wed Oct 6 07:52:27 EDT 2010 

[truetype] Improve error handling of `SHZ' bytecode instruction.
Problem reported by Chris Evans <[email protected]>.

* src/truetype/ttinterp.c (Ins_SHZ): Check `last_point'.

git/fs: mount .git/fs: mount/attach disallowed 
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2010-10-06  Werner Lemberg  <[email protected]>
+
+	[truetype] Improve error handling of `SHZ' bytecode instruction.
+	Problem reported by Chris Evans <[email protected]>.
+
+	* src/truetype/ttinterp.c (Ins_SHZ): Check `last_point'.
+
 2010-10-05  Werner Lemberg  <[email protected]>
 
 	Fix Savannah bug #31253.
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -5795,7 +5795,16 @@
     if ( CUR.GS.gep2 == 0 && CUR.zp2.n_points > 0 )
       last_point = (FT_UShort)( CUR.zp2.n_points - 1 );
     else if ( CUR.GS.gep2 == 1 && CUR.zp2.n_contours > 0 )
+    {
       last_point = (FT_UShort)( CUR.zp2.contours[CUR.zp2.n_contours - 1] );
+
+      if ( BOUNDS( last_point, CUR.zp2.n_points ) )
+      {
+        if ( CUR.pedantic_hinting )
+          CUR.error = TT_Err_Invalid_Reference;
+        return;
+      }
+    }
     else
       last_point = 0;