>It is the reason device-type net is disabled by default, and it's
>not a serious risk. Anyone who can predict the arrival time of a
>network packet interrupt (and subsequent processing) within the
>precision of a CPU cycle counter has enough control over your
>machine that randomness is irrelevant.

	my understanding was that it is not a problem with "who can predict the
	arrival time of a network packet interrupt", but "arrival time of
	network packet interrupt may not be random enough" (like every 1
	second).  anyways precision of clock device used by rnd(4) would be
	a important factor here.

itojun