From: Daniel Borkmann <dborkman@redhat.com>
To: Thomas Graf <tgraf@suug.ch>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
"Theodore Ts'o" <tytso@mit.edu>,
netdev@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Where exactly will arch_fast_hash be used
Date: Thu, 04 Dec 2014 16:43:31 +0100 [thread overview]
Message-ID: <54808123.8000704@redhat.com> (raw)
In-Reply-To: <20141204153938.GC32140@casper.infradead.org>
On 12/04/2014 04:39 PM, Thomas Graf wrote:
> On 12/04/14 at 11:29pm, Herbert Xu wrote:
>> On Thu, Dec 04, 2014 at 03:26:37PM +0000, Thomas Graf wrote:
>>>
>>> As Daniel pointed out, this work originated for the OVS edge use
>>> case where security is of less concern and the rehashing is
>>> sufficient. Identifying collisions is less of interest as the user
>>> space fall back provides a greater surface for an attack.
>>
>> Well in that case the current setup I think is very misleading.
>> It's inviting unsuspecting kernel developers to use it as a hash
>> function for general hash tables, which AFAICS is something that
>> it fails at miserably.
>
> Well, it's called fast hash and not secure hash ;-) but a clear hint
> definitely wouldn't hurt.
Hm, I thought the kernel doc on arch_fast_hash() in include/linux/hash.h
would give enough of a hint ...
next prev parent reply other threads:[~2014-12-04 15:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-04 8:11 Where exactly will arch_fast_hash be used Herbert Xu
2014-12-04 12:34 ` Hannes Frederic Sowa
2014-12-04 13:14 ` Daniel Borkmann
2014-12-04 15:26 ` Thomas Graf
2014-12-04 15:29 ` Herbert Xu
2014-12-04 15:39 ` Thomas Graf
2014-12-04 15:43 ` Daniel Borkmann [this message]
2014-12-04 15:47 ` Herbert Xu
2014-12-04 15:51 ` Daniel Borkmann
2014-12-04 15:56 ` David Laight
2014-12-04 16:10 ` Herbert Xu
-- strict thread matches above, loose matches on Subject: below --
2014-12-07 5:20 George Spelvin
2014-12-07 9:28 ` Herbert Xu
2014-12-07 10:02 ` George Spelvin
2014-12-07 12:51 ` Herbert Xu
2014-12-07 13:23 ` George Spelvin
2014-12-07 14:06 ` Hannes Frederic Sowa
2014-12-07 21:33 ` George Spelvin
2014-12-08 11:25 ` Hannes Frederic Sowa
2014-12-08 16:19 ` George Spelvin
2014-12-08 16:32 ` Hannes Frederic Sowa
2014-12-09 14:24 ` Herbert Xu
2014-12-07 13:14 ` Hannes Frederic Sowa
2014-12-07 13:30 ` George Spelvin
2014-12-07 13:41 ` Hannes Frederic Sowa
2014-12-07 13:52 ` Hannes Frederic Sowa
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