Messages in this thread | | | Date | Mon, 8 Nov 2010 10:03:42 +0000 | From | Alan Cox <> | Subject | Re: [Security] proactive defense: using read-only memory, RO/NX modules |
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> Nice! IMHO we need more of that. (If the readonly section gets big enough in > practice we could perhaps even mark it large-page in the future. It could serve as > an allocator to module code as well - that would probably be a speedup even for > modules.)
You ideally want one other thing to go with it. While a non-guest can't support it the marking of pages "permanently and irrevocably" readonly in a guest is something a hypedvisor can happily enforce and provide for the lifetime of the guest.
Alan
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