--- drivers/char/tty_io.c

+++ drivers/char/tty_io.c

@@ -3029,6 +3029,8 @@ static void __proc_set_tty(struct task_s

put_pid(tsk->signal->tty_old_pgrp);

tsk->signal->tty = tty_kref_get(tty);

tsk->signal->tty_old_pgrp = NULL;

+

+ sched_autogroup_create_attach(tsk);

}

static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty)