Re: [PATCH] notify_parent and ptrace cleanup

[OGAWA Hirofumi]

> > SIGKILL _already_ doesn't actually wake up a ptraced task. It just informs 
> > the tracer, last I looked.

I'm thinking the following issue here,

For example,

ptraced task stopping:

   in get_signal_to_deliver(),
	set_current_state(TASK_STOPPED);
	spin_unlock_irq(&current->sighand->siglock);
	notify_parent(current, SIGCHLD);
	schedule();

in here, root want to kill those tasks,

   kill -> ... -> specific_send_sig_info -> signal_wake_up(t, sig == SIGKILL)

   in signal_wake_up(),
	mask = TASK_INTERRUPTIBLE;
	if (resume)
		mask |= TASK_STOPPED;
	if (!wake_up_state(t, mask))


Hmm.. I may be missing something...?
-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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