ofz#4436 check if seek succeeded

Change-Id: I56d9692647b28c706b56ccacf08d494b3d830d94
Reviewed-on: https://gerrit.libreoffice.org/45295
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/filter/source/msfilter/msdffimp.cxx b/filter/source/msfilter/msdffimp.cxx
index eac8803da7f4..8ea4619c89f0 100644
--- a/filter/source/msfilter/msdffimp.cxx
+++ b/filter/source/msfilter/msdffimp.cxx
@@ -6031,7 +6031,10 @@ bool SvxMSDffManager::GetShapeGroupContainerData( SvStream& rSt,
                 return false;
         }
         else
-            rSt.SeekRel( nLength );
+        {
+            if (!checkSeek(rSt, rSt.Tell() + nLength))
+                return false;
+        }
         nReadSpGrCont += nLength;
     }
     while( nReadSpGrCont < nLenShapeGroupCont );