diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index b7ccdc6a985d..1ff01f03d2ad 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2500,8 +2500,11 @@ static void free_idle_threads(void)
 			struct idle_thread_runtime *itr;
 
 			itr = thread__priv(idle);
-			if (itr)
+			if (itr) {
 				thread__put(itr->last_thread);
+				free_callchain(&itr->callchain);
+				callchain_cursor_cleanup(&itr->cursor);
+			}
 
 			thread__put(idle);
 		}
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 8981ae879ebb..31c675cbab63 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -1578,6 +1578,21 @@ void free_callchain(struct callchain_root *root)
 	free_callchain_node(&root->node);
 }
 
+void callchain_cursor_cleanup(struct callchain_cursor *cursor)
+{
+	struct callchain_cursor_node *node, *next;
+
+	callchain_cursor_reset(cursor);
+
+	for (node = cursor->first; node; node = next) {
+		next = node->next;
+		free(node);
+	}
+	cursor->first = NULL;
+	cursor->last = &cursor->first;
+	cursor->curr = NULL;
+}
+
 static u64 decay_callchain_node(struct callchain_node *node)
 {
 	struct callchain_node *child;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 0eb5d7a1a41d..8b1e405d1cdf 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -286,6 +286,7 @@ int callchain_list_counts__printf_value(struct callchain_list *clist,
 					FILE *fp, char *bf, int bfsize);
 
 void free_callchain(struct callchain_root *root);
+void callchain_cursor_cleanup(struct callchain_cursor *cursor);
 void decay_callchain(struct callchain_root *root);
 int callchain_node__make_parent_list(struct callchain_node *node);