Re: [PATCH v2 0/4] Checkpoint/Restore: Show in proc IDs of objects that can be shared between tasks

Vasiliy Kulikov
2011-11-19T08:21:13Z

On Sat, Nov 19, 2011 at 12:10 +0400, Vasiliy Kulikov wrote:
> Also, if one should have an ability to learn IDs of specific object
> types and the set of types is very limited, it's much safer to have one
> increasing u64 counter for each created object of one of these types.
> The exposed to userspace data will be:
>
> ID = hash(counter ^ cookie)

Even hash(counter) without any cookie and counter is randomly generated at boot time.

--
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments