Re: [RFC] syscalls, x86: Add __NR_kcmp syscall

[Pavel Emelyanov]

> 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))

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.

Thanks,
Pavel
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