[Libreoffice-commits] core.git: Branch 'libreoffice-4-0' - cppcanvas/source

[Michael Stahl]

 cppcanvas/source/mtfrenderer/emfplus.cxx |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

New commits:
commit 6cf68eab5eb77b7e081ef5f8d59d196411e86567
Author: Michael Stahl <mstahl at redhat.com>
Date:   Mon Feb 25 13:15:19 2013 +0100

    fdo#59405: cppcanvas: fix infinite loop in processEMFPlus
    
    This can be observed when inserting the bugdoc from fdo#59405.
    Apparently the "size" and "length" do not agree; ensure that the
    "length" does not underflow.
    
    Change-Id: Idfc68919859b8284c724831de21208e4392af328
    (cherry picked from commit ec0d1440cf07008a220708535848567bcbb233ea)
    Reviewed-on: https://gerrit.libreoffice.org/2394
    Reviewed-by: Radek Doulík <rodo at novell.com>
    Tested-by: Radek Doulík <rodo at novell.com>

diff --git a/cppcanvas/source/mtfrenderer/emfplus.cxx b/cppcanvas/source/mtfrenderer/emfplus.cxx
index f1b0eff..0c9db41 100644
--- a/cppcanvas/source/mtfrenderer/emfplus.cxx
+++ b/cppcanvas/source/mtfrenderer/emfplus.cxx
@@ -1763,7 +1763,16 @@ namespace cppcanvas
 
                 rMF.Seek (next);
 
-                length -= size;
+                if (size <= length)
+                {
+                    length -= size;
+                }
+                else
+                {
+                    SAL_WARN("cppcanvas", "ImplRenderer::processEMFPlus: "
+                            "size " << size << " > length " << length);
+                    length = 0;
+                }
             }
         }
     }