From 8a11feacc32aa5dcf0130d7499535624805fc87e Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Thu, 22 Oct 2020 15:19:48 -0400
Subject: Avoid leak by resolving object streams more than once (fuzz issue
 23642)

---
 libqpdf/QPDF.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libqpdf/QPDF.cc')

diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index 2ffd4cc6..d256e444 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -2082,6 +2082,11 @@ QPDF::resolve(int objid, int generation)
 void
 QPDF::resolveObjectsInStream(int obj_stream_number)
 {
+    if (this->m->resolved_object_streams.count(obj_stream_number))
+    {
+        return;
+    }
+    this->m->resolved_object_streams.insert(obj_stream_number);
     // Force resolution of object stream
     QPDFObjectHandle obj_stream = getObjectByID(obj_stream_number, 0);
     if (! obj_stream.isStream())
-- 
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