linux-kernel - Re: [PATCH v3 2/3] m68k: virt: generate new RNG seed on reboot

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Message-ID: <CAMuHMdWT8dhre5TGjYRnEwn_jCZ6CXxvMpLmKp3KKo_CjPOXRQ@mail.gmail.com>
Date:   Mon, 26 Sep 2022 12:10:35 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] m68k: virt: generate new RNG seed on reboot

Hi Jason,

On Fri, Sep 23, 2022 at 7:03 PM Jason A. Donenfeld <Jason@...c4.com> wrote:
> Rather than rebooting into a system with no entropy, regenerate the RNG
> seed before rebooting, so that the new system has a fresh seed.
>
> Fixes: a1ee38ab1a75 ("m68k: virt: Use RNG seed from bootinfo block")
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>

Thanks for your patch!

I still doubt this is actually guaranteed to work, as the memory containing
the bootinfo might be overwritten during normal operation.

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