detect infinite recurse in object creation

Change-Id: Ie56eb27bb1827860b2600a5586e866e39cd31518

lotuswordpro/source/filter/lwpobjfactory.cxx

@@ -701,7 +701,12 @@ rtl::Reference<LwpObject> LwpObjectFactory::QueryObject(const LwpObjectID &objID
             return nullptr;
         }
 
+        if (std::find(m_aObjsIDInCreation.begin(), m_aObjsIDInCreation.end(), objID) != m_aObjsIDInCreation.end())
+            throw std::runtime_error("recursion in object creation");
+
+        m_aObjsIDInCreation.push_back(objID);
         obj = CreateObject(objHdr.GetTag(), objHdr);
+        m_aObjsIDInCreation.pop_back();
     }
     return obj;
 }

lotuswordpro/source/filter/lwpobjfactory.hxx

@@ -72,6 +72,7 @@
 #include "lwpidxmgr.hxx"
 
 #include <unordered_map>
+#include <vector>
 
 /**
  * @brief   object factory used for lwp object creation and maintenance
@@ -85,9 +86,9 @@ public:
 
 //For object Factory and object manager
 private:
-//  static LwpObjectFactory *m_pMgr;
     sal_uInt32 m_nNumObjs;
     LwpSvStream* m_pSvStream;
+    std::vector<LwpObjectID> m_aObjsIDInCreation;
     struct hashFunc
     {
             size_t operator()( const LwpObjectID& rName ) const