diff -u cups-1.4.6/debian/changelog cups-1.4.6/debian/changelog
--- cups-1.4.6/debian/changelog
+++ cups-1.4.6/debian/changelog
@@ -1,3 +1,12 @@
+cups (1.4.6-5ubuntu1.3) natty-proposed; urgency=low
+
+  * debian/local/filters/pdf-filters/pdftopdf/P2PResources.cxx: Fixed
+    memory leak in pdftopdf filter which made the filter taking up several
+    gigabytes when processing certain PDF files. Thanks to upstream
+    author Koji Otani for the quick fix (LP: #790378).
+
+ -- Till Kamppeter <till.kamppeter@gmail.com>  Fri,  3 Jun 2011 10:51:59 +0200
+
 cups (1.4.6-5ubuntu1.2) natty-proposed; urgency=low
 
   * debian/local/pstopdf.convs, debian/local/pstopdf.types: Do not apply
diff -u cups-1.4.6/debian/local/filters/pdf-filters/pdftopdf/P2PResources.cxx cups-1.4.6/debian/local/filters/pdf-filters/pdftopdf/P2PResources.cxx
--- cups-1.4.6/debian/local/filters/pdf-filters/pdftopdf/P2PResources.cxx
+++ cups-1.4.6/debian/local/filters/pdf-filters/pdftopdf/P2PResources.cxx
@@ -179,13 +179,24 @@
     P2PForm *form;
 
     xobjDict->getVal(i,&xobj);
-    if (!xobj.isStream()) continue;
+    if (!xobj.isStream()) {
+        xobj.free();
+        continue;
+    }
     strDict = xobj.streamGetDict();
     strDict->lookupNF("Subtype",&obj);
-    if (!obj.isName() || strcmp("Form",obj.getName()) != 0) continue;
+    if (!obj.isName() || strcmp("Form",obj.getName()) != 0) {
+        obj.free();
+        xobj.free();
+        continue;
+    }
     obj.free();
     strDict->lookupNF("Resources",&obj);
-    if (!obj.isNull()) continue;
+    if (!obj.isNull()) {
+        obj.free();
+        xobj.free();
+        continue;
+    }
     /* found a Form without Resource,
       replace it with a refrence to a P2PForm */
     form = new P2PForm(&xobj,this,map);