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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Kees Cook <keescook@chromium.org>,
	Anna-Maria Gleixner <anna-maria@linutronix.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	tcharding <me@tobin.cc>
Subject: Re: Hashed pointer issues
Date: Thu, 3 May 2018 10:41:19 +0200
Message-ID: <CAMuHMdWuJJ93ToDVX6Jg0mV8azr1vXmXHCtEbDhBXw6esevLug@mail.gmail.com> (raw)
In-Reply-To: <1e0bc2e2-a0d8-16b7-b6a4-cf97ecd99cef@infradead.org>

On Mon, Apr 30, 2018 at 7:06 PM, Randy Dunlap <rdunlap@infradead.org> wrote:
> On 04/30/2018 10:01 AM, Linus Torvalds wrote:
>> On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
>> torvalds@linux-foundation.org> wrote:
>>
>>> Although in *practice* we'd have tons of entropy on any modern development
>>> CPU too, since any new hardware will have the hardware random number
>>> generation. Some overly cautious person might not trust it, of course.
>>
>> In fact, maybe that's the right policy. Avoid a boot-time parameter by just
>> saying
>>
>>   "if you have hardware random number generation, we can fill entropy
>> immediately"
>>
>> No kernel command line needed in practice any more. That's assuming any
>> kernel developer will have an IvyBridge or newer.
>
> any paid kernel developer :)

Developing for x86...

It takes several seconds to have collected sufficient entropy on e.g. some
ARM/ARM64 systems.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-30 15:50 Anna-Maria Gleixner
2018-04-30 16:11 ` Kees Cook
2018-04-30 16:31   ` Linus Torvalds
2018-04-30 16:41     ` Steven Rostedt
2018-04-30 16:57       ` Linus Torvalds
2018-04-30 17:01         ` Linus Torvalds
2018-04-30 17:06           ` Randy Dunlap
2018-04-30 17:12             ` Linus Torvalds
2018-05-01  7:05               ` tcharding
2018-05-03  8:41             ` Geert Uytterhoeven [this message]
2018-04-30 18:38           ` Kees Cook
2018-04-30 19:00             ` Linus Torvalds
2018-04-30 19:16               ` Kees Cook
2018-04-30 20:01                 ` Linus Torvalds
2018-04-30 20:07                   ` Linus Torvalds
2018-04-30 21:23                 ` Tobin C. Harding

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