hardcoded SIGSEGV in __die() ?

[David Laight]

From: Joakim Tjernlund
> Sent: 23 March 2020 15:45
...
> > > I tried to follow that chain thinking it would end up sending a signal to user space but I cannot
> see
> > > that happens. Seems to be related to debugging.
> > >
> > > In short, I cannot see any signal being delivered to user space. If so that would explain why
> > > our user space process never dies.
> > > Is there a signal hidden in machine_check handler for SIGBUS I cannot see?
> > >
> >
> > Isn't it done in do_exit(), called from oops_end() ?
> 
> hmm, so it seems. The odd thing though is that do_exit takes an exit code, not signal number.
> Also, feels a bit odd to force an exit(that we haven't seen happening) rather than just a signal.

Isn't there something 'magic' that converts EFAULT into SIGSEGV?

	David

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