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SubjectRe: [PATCH 00/10] Control Flow Enforcement - Part (3)
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On Tue, 2018-06-12 at 20:56 +1000, Balbir Singh wrote:
>
> On 08/06/18 00:37, Yu-cheng Yu wrote:
> > This series introduces CET - Shadow stack
> >
> > At the high level, shadow stack is:
> >
> > Allocated from a task's address space with vm_flags VM_SHSTK;
> > Its PTEs must be read-only and dirty;
> > Fixed sized, but the default size can be changed by sys admin.
> >
> > For a forked child, the shadow stack is duplicated when the next
> > shadow stack access takes place.
> >
> > For a pthread child, a new shadow stack is allocated.
> >
> > The signal handler uses the same shadow stack as the main program.
> >
>
> Even with sigaltstack()?
>
>
> Balbir Singh.

Yes.

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