Re: [RFC][PATCH 5/7][v4] Protect cinit from blocked fatal signals

[Oleg Nesterov]

On 12/30, Roland McGrath wrote:
>
> > > + * If @signal refers to a container-init and @signr is neither SIGKILL nor
> > > + * SIGSTOP, it was queued because it was blocked when it was posted.
> >
> > This is not right too. It is possible that init had a handler when
> > the signal was sent, and the handler was set to SIG_DFL before the
> > signal was dequeued.
>
> do_sigaction's sig_handler_ignored() should exclude that.

Yes sure, but sig_handler_ignored(sig) can be false, it doesn't take
SIGNAL_UNKILLABLE into account.

Oleg.

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