diff --git a/include/linux/sched.h b/include/linux/sched.h
index ad7ff332a0ac..dcba347cbffa 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1797,7 +1797,7 @@ current_restore_flags(unsigned long orig_flags, unsigned long flags)
 }
 
 extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial);
-extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed);
+extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_effective_cpus);
 #ifdef CONFIG_SMP
 extern void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask);
 extern int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask);
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 31f94c6ea0a5..9c5b659db63f 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2199,7 +2199,7 @@ static int cpuset_can_attach(struct cgroup_taskset *tset)
 		goto out_unlock;
 
 	cgroup_taskset_for_each(task, css, tset) {
-		ret = task_can_attach(task, cs->cpus_allowed);
+		ret = task_can_attach(task, cs->effective_cpus);
 		if (ret)
 			goto out_unlock;
 		ret = security_task_setscheduler(task);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 154506e4d1f5..5c7937b504d2 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8741,7 +8741,7 @@ int cpuset_cpumask_can_shrink(const struct cpumask *cur,
 }
 
 int task_can_attach(struct task_struct *p,
-		    const struct cpumask *cs_cpus_allowed)
+		    const struct cpumask *cs_effective_cpus)
 {
 	int ret = 0;
 
@@ -8760,9 +8760,11 @@ int task_can_attach(struct task_struct *p,
 	}
 
 	if (dl_task(p) && !cpumask_intersects(task_rq(p)->rd->span,
-					      cs_cpus_allowed)) {
-		int cpu = cpumask_any_and(cpu_active_mask, cs_cpus_allowed);
+					      cs_effective_cpus)) {
+		int cpu = cpumask_any_and(cpu_active_mask, cs_effective_cpus);
 
+		if (unlikely(cpu >= nr_cpu_ids))
+			return -EINVAL;
 		ret = dl_cpu_busy(cpu, p);
 	}