--- x/kernel/cgroup/cgroup.c
+++ y/kernel/cgroup/cgroup.c
@@ -3264,7 +3264,7 @@ restart:
 			struct cgroup_subsys_state *css = cgroup_css(dsct, ss);
 			DEFINE_WAIT(wait);
 
-			if (!css || !css_is_dying(css))
+			if (!css || !css_is_online(css))
 				continue;
 
 			cgroup_get_live(dsct);