Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RFC, PATCHv2 29/29] mm, x86: introduce RLIMIT_VADDR | Date | Wed, 04 Jan 2017 14:55:41 +0100 |
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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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