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Date: Thu, 13 Aug 2020 09:53:11 +0200 From: Sedat Dilek <sedat.dilek@...il.com> To: Willy Tarreau <w@....eu> Cc: George Spelvin <lkml@....org>, Amit Klein <aksecurity@...il.com>, Eric Dumazet <edumazet@...gle.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>, Linus Torvalds <torvalds@...ux-foundation.org>, netdev@...r.kernel.org Subject: Re: [DRAFT PATCH] random32: make prandom_u32() output unpredictable On Wed, Aug 12, 2020 at 5:21 AM Willy Tarreau <w@....eu> wrote: > > On Tue, Aug 11, 2020 at 12:51:43PM +0200, Sedat Dilek wrote: > > Can you share this "rebased to mainline" version of George's patch? > > You can pick it from there if that helps, but keep in mind that > it's just experimental code that we use to explain our ideas and > that we really don't care a single second what kernel it's applied > to: > > https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/cleanups.git/log/?h=20200811-prandom-1 > Thanks Willy. I disagree: the base for testing should be clear(ly communicated). There are two diffs from Eric to #1: add a trace event for prandom_u32() and #2: a removal of prandom_u32() call in tcp_conn_request(). In case you have not seen. The first was helpful for playing with linux-perf. I have tested both together with [2]. - Sedat - [1] https://marc.info/?l=linux-netdev&m=159716173516111&w=2 [2] https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/log/?h=random/fast Note2myself: Enable some useful random/random32 Kconfigs RANDOM32_SELFTEST n -> y WARN_ALL_UNSEEDED_RANDOM n -> y - EOT -
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