From 54ea46ce09ab2be15901240bf233845c92bf04af Mon Sep 17 00:00:00 2001
From: Francisco Oca <xyzthor@gmail.com>
Date: Mon, 8 May 2017 02:07:49 -0700
Subject: [PATCH] Patch for CVE-2017-7698

--- swftools-0.9.2/lib/pdf/xpdf/Gfx.cc.orig	2017-12-28 23:41:31.464173918 -0500
+++ swftools-0.9.2/lib/pdf/xpdf/Gfx.cc	2017-12-28 23:42:27.690943552 -0500
@@ -3850,6 +3850,11 @@ void Gfx::doForm1(Object *str, Dict *res
     out->endTransparencyGroup(state);
   }
 
+  if (old_state != state) {
+      error(getPos(), "There's a form with uneven q and Q operations");
+      exit(-1);
+  }
+
   // restore base matrix
   for (i = 0; i < 6; ++i) {
     baseMatrix[i] = oldBaseMatrix[i];