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SubjectRe: [RFC] syscalls, x86: Add __NR_kcmp syscall
(1/18/12 4:19 AM), Pavel Emelyanov wrote:
>> I think Eric only said gt/lt compare is useful. We don't need to expose bare
>> pointer order. example, kcmp(rotate(ptr, per-task-random-value)) is enough
>> hide the critical information. I think.
>
> The per-task might break thinks up in case
>
> (tsk1->file != tsk2->file)&& (rotate(tsk1->file, tsk1->random) == rotate(tsk2->file, tsk2->rotate))

I meant,

(tsk1->file != tsk2->file) && (rotate(tsk1->file, caller_task->random) == rotate(tsk2->file, caller_task->random))



>
> but I agree, that the overall idea of comparing not bare pointers, but those poisoned with
> some global value can address the Peter's concerns about rootkits.




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