From: Sedat Dilek <sedat.dilek@gmail.com>
To: George Spelvin <lkml@sdf.org>
Cc: Amit Klein <aksecurity@gmail.com>, Willy Tarreau <w@1wt.eu>,
Eric Dumazet <edumazet@google.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Andy Lutomirski <luto@kernel.org>,
Kees Cook <keescook@chromium.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
netdev@vger.kernel.org
Subject: Re: [DRAFT PATCH] random32: make prandom_u32() output unpredictable
Date: Sun, 9 Aug 2020 23:10:50 +0200 [thread overview]
Message-ID: <CA+icZUVfauaXK0aEDkPPvurM_1M6h_T_iiM9gXixdg_-qustgQ@mail.gmail.com> (raw)
In-Reply-To: <CA+icZUVnsmf1kXPYFYufStQ_MxnLuxL+EWfDS2wQy1VbAEMwkA@mail.gmail.com>
+ CC:netdev
( Just FYI: Build and boot on bare metal. )
- Sedat -
On Sun, Aug 9, 2020 at 11:01 PM Sedat Dilek <sedat.dilek@gmail.com> wrote:
>
> Hi George,
>
> I have tried your patch on top of Linux v5.8 with...
>
> commit f227e3ec3b5c ("random32: update the net random state on
> interrupt and activity")
>
> ...reverted.
> This was a bit tricky - what was your base?
>
> Applied the typo fix from Randy - will a v2 follow?
>
> Why DRAFT and not RFC?
>
> Please drop the CC:stable - it's a DRAFT.
>
> Other Linux stable like linux-5.7.y include...
>
> commit c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
> random32: move the pseudo-random 32-bit definitions to prandom.h
>
> commit 585524081ecdcde1c719e63916c514866d898217
> random: random.h should include archrandom.h, not the other way around
>
> ...linux-5.8.y stable will follow.
>
> Isn't the move to prandom.h making your patch easier to apply?
>
> In a second build I applied the snippet from Willy.
>
> What do you mean by...?
>
> [ quote ]
> I wonder if, on general principles, it would be better to use a more
> SipHash style mixing in of the sample:
> m = get_cycles();
> v3 ^= m;
> SIPROUND(v0, v1, v2, v3);
> SIPROUND(v0, v1, v2, v3);
> v0 ^= m;
>
> Not sure if it's worth the extra register (and associated spill/fill).
> [ /quote ]
>
> Have you a snippet for testing?
>
> Thanks.
>
> Regards,
> - Sedat -
next parent reply other threads:[~2020-08-09 21:11 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CA+icZUVnsmf1kXPYFYufStQ_MxnLuxL+EWfDS2wQy1VbAEMwkA@mail.gmail.com>
2020-08-09 21:10 ` Sedat Dilek [this message]
[not found] ` <20200809235412.GD25124@SDF.ORG>
[not found] ` <20200810034948.GB8262@1wt.eu>
[not found] ` <20200811053455.GH25124@SDF.ORG>
[not found] ` <20200811054328.GD9456@1wt.eu>
[not found] ` <20200811062814.GI25124@SDF.ORG>
[not found] ` <20200811074538.GA9523@1wt.eu>
2020-08-11 10:51 ` [DRAFT PATCH] random32: make prandom_u32() output unpredictable Sedat Dilek
2020-08-11 11:01 ` Sedat Dilek
2020-08-12 3:21 ` Willy Tarreau
2020-08-13 7:53 ` Sedat Dilek
2020-08-13 8:06 ` Willy Tarreau
2020-08-13 8:13 ` Sedat Dilek
2020-08-13 8:27 ` Sedat Dilek
2020-08-13 14:00 ` Eric Dumazet
2020-08-13 16:02 ` Sedat Dilek
2020-08-14 15:32 ` Sedat Dilek
2020-08-14 16:05 ` Willy Tarreau
2020-08-14 16:17 ` Sedat Dilek
2020-08-16 15:01 ` Willy Tarreau
2020-08-16 16:48 ` Sedat Dilek
2020-08-20 3:05 ` Sedat Dilek
2020-08-20 4:33 ` Willy Tarreau
2020-08-20 4:42 ` Sedat Dilek
2020-08-20 6:08 ` Willy Tarreau
2020-08-20 6:58 ` Willy Tarreau
2020-08-20 8:05 ` Willy Tarreau
2020-08-20 12:08 ` Sedat Dilek
[not found] ` <CANEQ_+L+22Hkdqf38Zr0bfq16fcL1Ax2X9fToXV_niHKXCB8aA@mail.gmail.com>
2020-08-27 1:09 ` Willy Tarreau
2020-08-27 7:08 ` Sedat Dilek
2020-08-08 15:26 Flaw in "random32: update the net random state on interrupt and activity" George Spelvin
2020-08-09 6:57 ` [DRAFT PATCH] random32: make prandom_u32() output unpredictable George Spelvin
2020-08-09 9:38 ` Willy Tarreau
2020-08-09 17:06 ` George Spelvin
2020-08-09 17:33 ` Willy Tarreau
2020-08-09 18:30 ` George Spelvin
2020-08-09 19:16 ` Willy Tarreau
2020-08-10 11:47 ` Willy Tarreau
2020-08-10 12:01 ` David Laight
2020-08-10 14:48 ` Willy Tarreau
2020-08-10 12:03 ` Florian Westphal
2020-08-10 14:53 ` Willy Tarreau
2020-08-10 16:31 ` Linus Torvalds
2020-08-10 16:58 ` Willy Tarreau
2020-08-10 17:45 ` Linus Torvalds
2020-08-10 18:01 ` Willy Tarreau
2020-08-10 21:04 ` Willy Tarreau
2020-08-11 5:26 ` George Spelvin
2020-08-11 5:37 ` Willy Tarreau
2020-08-11 3:47 ` George Spelvin
2020-08-11 3:58 ` Willy Tarreau
[not found] ` <fdbc7d7d-cba2-ef94-9bde-b3ccae0cfaac@gmail.com>
2020-08-09 21:10 ` Marc Plumb
2020-08-09 21:48 ` Linus Torvalds
2020-08-09 13:50 ` Randy Dunlap
[not found] ` <CANEQ_++a4YcwQQ2XhuguTono9=RxbSRVsMw08zLWBWJ_wxG2AQ@mail.gmail.com>
2020-08-09 16:08 ` George Spelvin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CA+icZUVfauaXK0aEDkPPvurM_1M6h_T_iiM9gXixdg_-qustgQ@mail.gmail.com \
--to=sedat.dilek@gmail.com \
--cc=Jason@zx2c4.com \
--cc=aksecurity@gmail.com \
--cc=edumazet@google.com \
--cc=keescook@chromium.org \
--cc=lkml@sdf.org \
--cc=luto@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=w@1wt.eu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).