diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index c8d53397bbdd43a05810282dbeb72848cba02c6b..aa6e72fb7c089e857b3ede952e0e0b9ad0092421 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -216,7 +216,7 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns)
 	idr_for_each_entry_continue(&pid_ns->idr, pid, nr) {
 		task = pid_task(pid, PIDTYPE_PID);
 		if (task && !__fatal_signal_pending(task))
-			send_sig_info(SIGKILL, SEND_SIG_PRIV, task);
+			group_send_sig_info(SIGKILL, SEND_SIG_PRIV, task, PIDTYPE_MAX);
 	}
 	read_unlock(&tasklist_lock);
 	rcu_read_unlock();