diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 3e0fca894a8b..3378c44e147e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3598,6 +3598,10 @@ static int cgroup_rename(struct kernfs_node *kn, struct kernfs_node *new_parent,
 	struct cgroup *cgrp = kn->priv;
 	int ret;
 
+	/* do not accept '\n' to prevent making /proc/<pid>/cgroup unparsable */
+	if (strchr(new_name_str, '\n'))
+		return -EINVAL;
+
 	if (kernfs_type(kn) != KERNFS_DIR)
 		return -ENOTDIR;
 	if (kn->parent != new_parent)