linux-kernel - Re: Hashed pointer issues

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Message-ID: <CAMuHMdWuJJ93ToDVX6Jg0mV8azr1vXmXHCtEbDhBXw6esevLug@mail.gmail.com>
Date:   Thu, 3 May 2018 10:41:19 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Kees Cook <keescook@...omium.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        tcharding <me@...in.cc>
Subject: Re: Hashed pointer issues

On Mon, Apr 30, 2018 at 7:06 PM, Randy Dunlap <rdunlap@...radead.org> wrote:
> On 04/30/2018 10:01 AM, Linus Torvalds wrote:
>> On Mon, Apr 30, 2018 at 9:57 AM Linus Torvalds <
>> torvalds@...ux-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@...ux-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