Re: [PATCH v1] random: block in /dev/urandom

[Jason A. Donenfeld]

Hi Linus,

On Tue, Mar 22, 2022 at 10:27 AM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> On Tue, Mar 22, 2022 at 8:58 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> >
> > This patch (or a later version of it) made it into mainline and causes a
> > large number of qemu boot test failures for various architectures (arm,
> > m68k, microblaze, sparc32, xtensa are the ones I observed). Common
> > denominator is that boot hangs at "Saving random seed:". A sample bisect
> > log is attached. Reverting this patch fixes the problem.
>
> Ok, it was worth trying, but yeah, it clearly causes problems for
> various platforms that can't do jitter entropy and have nothing else
> happening either.
>
> Will revert.

Shucks. I wish I had a good argument here, but I suppose the most I
can say is maybe we'll be able to revisit it some time off. I'll send
you the revert patch in a minute.

Jason