Re: 4.14 "random: add a config option to trust the CPU's hwrng"

[Sasha Levin]

On Wed, Feb 06, 2019 at 11:44:36AM +0000, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> Hi stable maintainers,
>
> Can you consider including these "random" patches in 4.14.y?
>
> These are very useful in fixing esp. first-bootup delays of VMs due to
> entropy starvation.
>
>
> commit 39a8883a2b989d1d21bd8dd99f5557f0c5e89694
> Author: Theodore Ts'o <tytso@xxxxxxx>
> Date:   Tue Jul 17 18:24:27 2018 -0400
>
>    random: add a config option to trust the CPU's hwrng
>
> commit 9b25436662d5fb4c66eb527ead53cab15f596ee0
> Author: Kees Cook <keescook@xxxxxxxxxxxx>
> Date:   Mon Aug 27 14:51:54 2018 -0700
>
>    random: make CPU trust a boot parameter

This really looks like a new feature to me. The "old" behaviour of not
trusting RDRAND-like randomness was by-design rather than an oversight.

--
Thanks,
Sasha