Messages in this thread | | | Date | Mon, 3 Feb 2014 21:54:22 +0000 (GMT) | From | "Maciej W. Rozycki" <> | Subject | Re: [PATCH,RFC] random: collect cpu randomness |
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On Mon, 3 Feb 2014, Theodore Ts'o wrote:
> > How about taking the saved registers from the interrupted CPU, xor'ing > > them all and calling the result random_get_entropy() on systems > > lacking a good cycles-counter? > > So we could take the struct pt_regs which we get from get_irq_regs(), > XOR them together and use them to feed into input[2] amd input[3] in > add_interrupt_randomness(). Or some other way of distributing the > values of all of the irq registers into the __u32 input[4] array.
Can we be sure we don't leak information this way? Just being paranoid...
Maciej
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