1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index d0f600c94843..279d2552dae7 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8967,6 +8967,15 @@ cpu_cgroup_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
 static int
 cpu_cgroup_can_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
 {
+	if ((current != tsk) && (!capable(CAP_SYS_NICE))) {
+		const struct cred *cred = current_cred(), *tcred;
+
+		tcred = __task_cred(tsk);
+
+		if (cred->euid != tcred->uid && cred->euid != tcred->suid)
+			return -EPERM;
+	}
+
 #ifdef CONFIG_RT_GROUP_SCHED
 	if (!sched_rt_can_attach(cgroup_tg(cgrp), tsk))
 		return -EINVAL;