--- 43cf3ea9e088fd86953637450036ecb56f3964fd
+++ a31a8cd67570384be6b622c8e643c5f46a79d566
@@ -48,6 +48,9 @@ static inline void callchain_init(struct
 	INIT_LIST_HEAD(&node->brothers);
 	INIT_LIST_HEAD(&node->children);
 	INIT_LIST_HEAD(&node->val);
+
+	node->parent = NULL;
+	node->hit = 0;
 }
 
 static inline u64 cumul_hits(struct callchain_node *node)