--- a/hotspot/src/share/vm/prims/jni.cpp	Wed Jul 05 16:39:00 2017 +0200
+++ b/hotspot/src/share/vm/prims/jni.cpp	Sat Jul 19 17:38:22 2008 -0400
@@ -2173,8 +2173,7 @@
     size_t size = os::vm_allocation_granularity();
     bad_address = os::reserve_memory(size);
     if (bad_address != NULL) {
-      os::commit_memory(bad_address, size);
-      os::protect_memory(bad_address, size);
+      os::protect_memory(bad_address, size, os::MEM_PROT_READ);
     }
   }
   return bad_address;