On Sat, Apr 01, 2017 at 08:55:44PM +0800, Liping Zhang wrote: > From: Liping Zhang <zlpnobody@xxxxxxxxx> > > One CPU is doing ctnetlink_change_helper(), while another CPU is doing > unhelp() at the same time. So even if help->helper is not NULL at first, > the later statement strcmp(help->helper->name, ...) may still access > the NULL pointer. > > So we must use rcu_read_lock and rcu_dereference to avoid such _bad_ > thing happen. Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
