On Sat, Feb 15, 2014 at 03:27:00PM +0100, Oleg Nesterov wrote: > 1. info->q can be already freed if SIGQUEUE_PREALLOC. > > Once get_signal_to_deliver() or any other caller drops ->siglock > another thread can do sys_timer_delete()->sigqueue_free().
How the devil would it find the sucker? It's off the list already. > 2. We need to move do_schedule_next_timer() from dequeue_signal() > here. > > Otherwise ->q can be reused/overwritten by the next send_sigqueue() > right affter ->siglock is dropped. Ditto. We rip them out of queue on collect_signal(); the only thing we do not do is actual __sigqueue_free(). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
