diff --git a/kernel/pid.c b/kernel/pid.c
index cdf63e53a01425182d66f1c8883a249cedbaaa88..b88fe5e494ccfd46e26fbe78e843c1fc2f7244f7 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -233,8 +233,10 @@ struct pid *alloc_pid(struct pid_namespace *ns)
 
 out_free:
 	spin_lock_irq(&pidmap_lock);
-	while (++i <= ns->level)
-		idr_remove(&ns->idr, (pid->numbers + i)->nr);
+	while (++i <= ns->level) {
+		upid = pid->numbers + i;
+		idr_remove(&upid->ns->idr, upid->nr);
+	}
 
 	/* On failure to allocate the first pid, reset the state */
 	if (ns->pid_allocated == PIDNS_ADDING)