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SubjectRe: [RFC, PATCHv2 29/29] mm, x86: introduce RLIMIT_VADDR
Date
On Tuesday, January 3, 2017 2:09:16 PM CET Andy Lutomirski wrote:
> >
> >> When
> >> ADDR_LIMIT_EXPLICIT is in effect, prctl can set a 64-bit numeric
> >> limit. If ADDR_LIMIT_EXPLICIT is cleared, the prctl value stops being
> >> settable and reading it via prctl returns whatever is implied by the
> >> other personality bits.
> >
> > I don't see anything wrong with it, but I'm a bit confused now
> > what this would be good for, compared to using just prctl.
> >
> > Is this about setuid clearing the personality but not the prctl,
> > or something else?
>
> It's to avid ambiguity as to what happens if you set ADDR_LIMIT_32BIT
> and use the prctl. ISTM it would be nice for the semantics to be
> fully defined in all cases.
>

Ok, got it.

Arnd

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