ofz#2980 Timeout

Change-Id: Id36e0e8ae11a145b5efa976c20261af931c1d58b
Reviewed-on: https://gerrit.libreoffice.org/49627Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/source/filter/ww8/ww8graf2.cxx

@@ -29,6 +29,7 @@
 #include <sfx2/app.hxx>
 #include <sfx2/docfile.hxx>
 #include <sfx2/fcontnr.hxx>
+#include <unotools/configmgr.hxx>
 #include <grfatr.hxx>
 #include <fmtanchr.hxx>
 #include <fmtcntnt.hxx>
@@ -267,12 +268,19 @@ bool SwWW8ImplReader::ReadGrafFile(OUString& rFileName, Graphic*& rpGraphic,
     }
 
     GDIMetaFile aWMF;
-    pSt->Seek( nPosFc );
-    bool bOk = ReadWindowMetafile( *pSt, aWMF );
+    bool bOk = checkSeek(*pSt, nPosFc) && ReadWindowMetafile( *pSt, aWMF );
 
     if (!bOk || pSt->GetError() || !aWMF.GetActionSize())
         return false;
 
+    //skip duplicate graphics when fuzzing
+    if (utl::ConfigManager::IsFuzzing())
+    {
+        if (m_aGrafPosSet.find(nPosFc) != m_aGrafPosSet.end())
+            return false;
+        m_aGrafPosSet.insert(nPosFc);
+    }
+
     if (m_xWwFib->m_envr != 1) // !MAC as creator
     {
         rpGraphic = new Graphic( aWMF );

sw/source/filter/ww8/ww8par.hxx

@@ -1198,6 +1198,11 @@ private:
     */
     std::vector<const SwCharFormat*> m_aRubyCharFormats;
 
+    /*
+    For fuzzing keep track of source offset of inserted graphics
+    */
+    std::set<sal_uLong> m_aGrafPosSet;
+
     WW8PostProcessAttrsInfo * m_pPostProcessAttrsInfo;
 
     std::shared_ptr<WW8Fib> m_xWwFib;