From fedd42191f0eec498ba1c22ef13beae0f37387aa Mon Sep 17 00:00:00 2001
From: m-holger <m-holger@kubitscheck.org>
Date: Tue, 25 Jul 2023 14:34:14 +0100
Subject: Change QPDF::copyForeignObject to return a null object when called
 with a /Pages object (fixes #1011)

---
 libqpdf/QPDF.cc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libqpdf')

diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index c5a7ab5d..45bd1847 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -2026,7 +2026,13 @@ QPDF::copyForeignObject(QPDFObjectHandle foreign)
     }
     obj_copier.to_copy.clear();
 
-    return obj_copier.object_map[foreign.getObjGen()];
+    auto& result = obj_copier.object_map[foreign.getObjGen()];
+    if (!result.isInitialized()) {
+        result = QPDFObjectHandle::newNull();
+        warn(damagedPDF("Unexpected reference to /Pages object while copying foreign object. "
+                        "Replacing with Null object."));
+    }
+    return result;
 }
 
 void
-- 
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