From 98f6da60b9d463c617e631fc254cf6d66f2e8e3c Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Mon, 12 Jun 2017 13:15:17 +0100
Subject: [PATCH] Bug 698026: bounds check zone pointers in Ins_IP()

---
 base/ttinterp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/base/ttinterp.c b/base/ttinterp.c
index f6a6d95..e7c9d68 100644
--- a/base/ttinterp.c
+++ b/base/ttinterp.c
@@ -4129,7 +4129,9 @@ static int nInstrCount=0;
     Int         point;
     (void)args;
 
-    if ( CUR.top < CUR.GS.loop )
+    if ( CUR.top < CUR.GS.loop ||
+         BOUNDS(CUR.GS.rp1, CUR.zp0.n_points) ||
+         BOUNDS(CUR.GS.rp2, CUR.zp1.n_points))
     {
       CUR.error = TT_Err_Invalid_Reference;
       return;
-- 
2.9.1