linux-kernel - Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE

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Date:	Mon, 26 May 2008 23:08:02 +0200
From:	"Gilles Espinasse" <g.esp@...e.fr>
To:	"Theodore Tso" <tytso@....EDU>, <linux-kernel@...r.kernel.org>
Cc:	"Chris Peterson" <cpeterso@...terso.com>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>,
	"Lennart Sorensen" <lsorense@...lub.uwaterloo.ca>,
	"Jeff Garzik" <jeff@...zik.org>,
	"Kok, Auke" <auke-jan.h.kok@...el.com>,
	"Rick Jones" <rick.jones2@...com>, "Glen Turner" <gdt@....id.au>
Subject: Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE_RANDOM


----- Original Message ----- 
From: "Theodore Tso" <tytso@....EDU>
To: "Glen Turner" <gdt@....id.au>
Cc: "Chris Peterson" <cpeterso@...terso.com>; "Alan Cox"
<alan@...rguk.ukuu.org.uk>; "Lennart Sorensen"
<lsorense@...lub.uwaterloo.ca>; "Jeff Garzik" <jeff@...zik.org>; "Kok, Auke"
<auke-jan.h.kok@...el.com>; "Rick Jones" <rick.jones2@...com>; "Brandeburg,
Jesse" <jes>
Sent: Monday, May 26, 2008 1:27 AM
Subject: Re: [PATCH] drivers/net: remove network drivers' last few uses of
IRQF_SAMPLE_RANDOM


...
>
> There is a reason why /dev/random is world-writeable; it's perfectly
> safe to write arbitary amounts of data into /dev/random.  If the
> attacker doesn't know what has been fixed into the entropy pool, his
> life just got a lot harder.  If it is the attacker mixing known data
> into the pool, it's no worse.
>
man 4 random recommand to save /dev/urandom during stop and seed
/dev/urandom at start.
For wich reason is it not recommanded to save and seed using /dev/random?

Gilles

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