diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index ace5bfc..efbfca7 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2599,6 +2599,7 @@
 
 	struct cgroup *cgrp = task_cs(tsk)->css.cgroup;
 
+	rcu_read_lock();
 	spin_lock(&cpuset_buffer_lock);
 
 	nodelist_scnprintf(cpuset_nodelist, CPUSET_NODELIST_LEN,
@@ -2607,6 +2608,7 @@
 	       tsk->comm, cgroup_name(cgrp), cpuset_nodelist);
 
 	spin_unlock(&cpuset_buffer_lock);
+	rcu_read_unlock();
 }
 
 /*