From: Eric Dumazet <eric.dumazet@gmail.com>
To: Rik van Riel <riel@redhat.com>
Cc: kernel-hardening@lists.openwall.com,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
George Spelvin <linux@sciencehorizons.net>,
"Theodore Ts'o" <tytso@mit.edu>, Andi Kleen <ak@linux.intel.com>,
David Miller <davem@davemloft.net>,
David Laight <David.Laight@aculab.com>,
"Daniel J . Bernstein" <djb@cr.yp.to>,
Eric Biggers <ebiggers3@gmail.com>,
Hannes Frederic Sowa <hannes@stressinduktion.org>,
Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>,
Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Andy Lutomirski <luto@amacapital.net>,
Netdev <netdev@vger.kernel.org>,
Tom Herbert <tom@herbertland.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Vegard Nossum <vegard.nossum@gmail.com>
Subject: Re: [kernel-hardening] Re: HalfSipHash Acceptable Usage
Date: Wed, 21 Dec 2016 09:08:21 -0800 [thread overview]
Message-ID: <1482340101.8944.53.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <1482338385.11006.67.camel@redhat.com>
On Wed, 2016-12-21 at 11:39 -0500, Rik van Riel wrote:
> Does anybody still have a P4?
>
> If they do, they're probably better off replacing
> it with an Atom. The reduced power bills will pay
> for replacing that P4 within a year or two.
Well, maybe they have millions of units to replace.
>
> In short, I am not sure how important the P4
> performance numbers are, especially if we can
> improve security for everybody else...
Worth adding that the ISN or syncookie generation are less than 10% of
the actual cost of handling a problematic (having to generate ISN or
syncookie) TCP packet anyway.
So we are talking of minors potential impact for '2000-era' cpus.
Definitely I vote for using SipHash in TCP ASAP.
next prev parent reply other threads:[~2016-12-21 17:08 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 17:32 Jason A. Donenfeld
[not found] ` <CAGiyFdduUNSGq24zfsk0ZU=hnOCmewAw8vw6XvDoS-3f+3UPKQ@mail.gmail.com>
2016-12-19 21:00 ` Jason A. Donenfeld
2016-12-20 21:36 ` Theodore Ts'o
2016-12-20 23:07 ` George Spelvin
2016-12-20 23:55 ` Eric Dumazet
2016-12-21 3:28 ` George Spelvin
2016-12-21 5:29 ` Eric Dumazet
2016-12-21 6:34 ` George Spelvin
2016-12-21 14:24 ` Jason A. Donenfeld
2016-12-21 15:55 ` George Spelvin
2016-12-21 16:37 ` Jason A. Donenfeld
2016-12-21 16:41 ` [kernel-hardening] " Rik van Riel
2016-12-21 17:25 ` Linus Torvalds
2016-12-21 18:07 ` George Spelvin
2016-12-22 1:54 ` Andy Lutomirski
2016-12-21 14:42 ` Jason A. Donenfeld
2016-12-21 15:56 ` Eric Dumazet
2016-12-21 16:33 ` Jason A. Donenfeld
2016-12-21 16:39 ` [kernel-hardening] " Rik van Riel
2016-12-21 17:08 ` Eric Dumazet [this message]
2016-12-21 18:37 ` George Spelvin
2016-12-21 18:40 ` Jason A. Donenfeld
2016-12-21 22:27 ` Theodore Ts'o
2016-12-22 0:18 ` George Spelvin
2016-12-22 1:13 ` George Spelvin
2016-12-21 22:29 [kernel-hardening] " Jason A. Donenfeld
2016-12-22 3:55 ` George Spelvin
2016-12-22 4:40 ` Jason A. Donenfeld
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