pktgen_thread_worker() is obviously racy, kthread_stop() can come
between the kthread_should_stop() check and set_current_state().
Signed-off-by: NOleg Nesterov <oleg@redhat.com>
Reported-by: NJan Stancek <jstancek@redhat.com>
Reported-by: NMarcelo Leitner <mleitner@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>