netdev - Re: [DRAFT PATCH] random32: make prandom

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Message-ID: <20200820080503.GC21526@1wt.eu>
Date:   Thu, 20 Aug 2020 10:05:03 +0200
From:   Willy Tarreau <w@....eu>
To:     Sedat Dilek <sedat.dilek@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>, George Spelvin <lkml@....org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Amit Klein <aksecurity@...il.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Andy Lutomirski <luto@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>, netdev@...r.kernel.org
Subject: Re: [DRAFT PATCH] random32: make prandom_u32() output unpredictable

On Thu, Aug 20, 2020 at 08:58:38AM +0200, Willy Tarreau wrote:
> I've just pushed a new branch "20200820-siphash-noise" that I also
> rebased onto latest master. It's currently running make allmodconfig
> here, so that will take a while, but I think it's OK as random32.o is
> already OK. I've also addressed a strange build issue caused by having
> an array instead of 4 ints in siprand_state.
> 
> Please just let me know if that's OK for you now.

At least it worked for me now (built with no errors on x86_64):

$ time make -j 8 bzImage modules
(...)
real    65m7.986s
user    477m22.477s
sys     38m0.545s
$ find . -name '*.ko' |wc -l
7983

Willy