On 02/15, Al Viro wrote:
>
> OK, _very_ preliminary patch follows. It's uglier than it has to
And I'm afraid it needs more uglifications...
> +void dismiss_siginfo(ksiginfo_t *info)
> +{
> + if (info->q)
> + __sigqueue_free(info->q);
> + info->q = NULL;
> +}
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().
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.
Oleg.
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