File poppler-CVE-2022-37050.patch of Package poppler.38201

From dcd5bd8238ea448addd102ff045badd0aca1b990 Mon Sep 17 00:00:00 2001
From: crt <chluo@cse.cuhk.edu.hk>
Date: Wed, 27 Jul 2022 08:40:02 +0000
Subject: [PATCH] pdfseparate: Check XRef's Catalog for being a Dict

---
 poppler/PDFDoc.cc | 4 ++++
 1 file changed, 4 insertions(+)

Index: poppler-0.79.0/poppler/PDFDoc.cc
===================================================================
--- poppler-0.79.0.orig/poppler/PDFDoc.cc
+++ poppler-0.79.0/poppler/PDFDoc.cc
@@ -937,6 +937,14 @@ int PDFDoc::savePageAs(const GooString *
   
   // get and mark output intents etc.
   Object catObj = getXRef()->getCatalog();
+  if (!catObj.isDict()) {
+      fclose(f);
+      delete yRef;
+      delete countRef;
+      delete outStr;        
+      error(errSyntaxError, -1, "XRef's Catelog is not a dictionary");
+      return errOpenFile;
+  }
   Dict *catDict = catObj.getDict();
   Object pagesObj = catDict->lookup("Pages");
   Object afObj = catDict->lookupNF("AcroForm").copy();