Messages in this thread | | | Date | Tue, 16 Jan 2001 12:13:23 +0100 | From | Andi Kleen <> |
| |
On Tue, Jan 16, 2001 at 10:48:34AM +0100, Ingo Molnar wrote: > this is a safe, very fast [ O(1) ] object-permission model. (it's a > variation of a former idea of yours.) A process can pass object > fingerprints and kernel pointers to other processes too - thus the other > process can access the object too. Threads will 'naturally' share objects, >...
Just setuid etc. doesn't work with that because access cannot be easily revoked without disturbing other clients.
To handle that you would probably need a "relookup if needed" mechanism similar to what NFSv4 has, so that you can force other users to relookup after you revoked a key. That complicates the use a lot though.
Also the model depends on good secure random numbers, which is questionable in many environments (e.g. a diskless box where the random device effectively gets no new input)
-Andi
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
| |