kmemleak: do not leak object after tree insertion error

index 45eb621..d6eec2d 100644
@@ -260,6 +260,7 @@ static struct early_log
 static int crt_early_log __initdata;
 
 static void kmemleak_disable(void);
+static void __delete_object(struct kmemleak_object *);
 
 /*
  * Print a warning and dump the stack trace.

@@ -576,6 +577,7 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size,
 	 * random memory blocks.
 	 */
 	if (node != &object->tree_node) {
+		__delete_object(object);
 		kmemleak_stop("Cannot insert 0x%lx into the object search tree "
 			      "(already existing)\n", ptr);
 		object = lookup_object(ptr, 1);