ofz#2980 timeout

Change-Id: Id54a6ef74059885728c1dffec10d67c9f56ba684
Reviewed-on: https://gerrit.libreoffice.org/42797Tested-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

@@ -493,14 +493,16 @@ SwFrameFormat* SwWW8ImplReader::ImportGraf(SdrTextObj const * pTextObj,
      * stream then contains the PICF and the corresponding graphic!
      * We otherwise map the variable pDataStream to pStream.
      */
-    sal_uLong nOldPos = m_pDataStream->Tell();
+    auto nOldPos = m_pDataStream->Tell();
     WW8_PIC aPic;
-    m_pDataStream->Seek( m_nPicLocFc );
-    PicRead( m_pDataStream, &aPic, m_bVer67);
+    bool bValid = checkSeek(*m_pDataStream, m_nPicLocFc);
+
+    if (bValid)
+        PicRead( m_pDataStream, &aPic, m_bVer67);
 
     // Sanity check is needed because for example check boxes in field results
     // contain a WMF-like struct
-    if (m_pDataStream->good() && (aPic.lcb >= 58))
+    if (bValid && m_pDataStream->good() && (aPic.lcb >= 58))
     {
         if( m_pFlyFormatOfJustInsertedGraphic )
         {

sw/source/filter/ww8/ww8scan.cxx

@@ -1894,7 +1894,9 @@ sal_Int32 WW8ScannerBase::WW8ReadString( SvStream& rStrm, OUString& rStr,
         if( !bPosOk )
             break;
 
-        rStrm.Seek( fcAct );
+        bool bValid = checkSeek(rStrm, fcAct);
+        if (!bValid)
+            break;
 
         long nLen = ( (nNextPieceCp < nBehindTextCp) ? nNextPieceCp
             : nBehindTextCp ) - nAktStartCp;