xnu-1699.24.23.tar.gz

[apple/xnu.git] / osfmk / vm / vm_object.c

diff --git a/osfmk/vm/vm_object.c b/osfmk/vm/vm_object.c
index 1c0138d82975577c01addda09628be7dc0d55660..2f7d54e3c1d05b002742f6367b3b89505ad6adef 100644 (file)
--- a/osfmk/vm/vm_object.c
+++ b/osfmk/vm/vm_object.c
@@ -3894,6 +3894,10 @@ vm_object_shadow(
        register vm_object_t    result;
 
        source = *object;
+       assert(source != VM_OBJECT_NULL);
+       if (source == VM_OBJECT_NULL)
+               return FALSE;
+
 #if 0
        /*
         * XXX FBDP