From: Ulrich Drepper <drepper@redhat.com>
To: Al Viro <viro@ftp.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Davide Libenzi <davidel@xmailserver.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>, Theodore Tso <tytso@mit.edu>,
Eric Dumazet <dada1@cosmosbay.com>,
Kyle Moffett <mrmacman_g4@mac.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2
Date: Sat, 09 Jun 2007 10:08:59 -0700 [thread overview]
Message-ID: <466ADEAB.7080202@redhat.com> (raw)
In-Reply-To: <20070609165454.GE4095@ftp.linux.org.uk>
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Al Viro wrote:
> That's simply not true. On the current kernel nothing stops you from e.g.
> picking a random number and using F_DUPFD.
Of course there are things stopping one from doing this (aside from the
kernel not allowing this in the moment at all since the highest fd
number is limited severely):
- - this scheme would only be use if it would be possible to have
completely random descriptor values. But what has been said here
already is that this is too costly. Hence the approach to randomize
only the base value.
- - there are two interface to use: open + fcntl. This is racy. And
don't tell me this doesn't matter.
- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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next prev parent reply other threads:[~2007-06-09 17:11 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-06 22:30 [patch 7/8] fdmap v2 - implement sys_socket2 Davide Libenzi
2007-06-06 22:44 ` David Miller
2007-06-06 22:52 ` Davide Libenzi
2007-06-06 22:57 ` David Miller
2007-06-06 22:57 ` Ulrich Drepper
2007-06-06 23:02 ` David Miller
2007-06-06 22:59 ` Alan Cox
2007-06-06 22:58 ` Ulrich Drepper
2007-06-06 23:04 ` Davide Libenzi
2007-06-06 23:08 ` David Miller
2007-06-06 23:19 ` Alan Cox
2007-06-06 23:22 ` Ulrich Drepper
2007-06-07 10:04 ` Alan Cox
2007-06-07 11:59 ` Kyle Moffett
2007-06-07 13:12 ` Eric Dumazet
2007-06-07 15:51 ` Davide Libenzi
2007-06-07 19:49 ` Davide Libenzi
2007-06-07 20:02 ` Ulrich Drepper
2007-06-07 20:05 ` Eric Dumazet
2007-06-07 20:18 ` Ulrich Drepper
2007-06-07 21:44 ` Davide Libenzi
2007-06-07 22:03 ` Ulrich Drepper
2007-06-07 22:40 ` Davide Libenzi
2007-06-08 12:07 ` Theodore Tso
2007-06-08 13:01 ` Alan Cox
2007-06-08 18:11 ` Davide Libenzi
2007-06-08 18:26 ` Alan Cox
2007-06-08 18:43 ` Ulrich Drepper
2007-06-08 18:46 ` Al Viro
2007-06-08 18:56 ` Ulrich Drepper
2007-06-08 19:07 ` Linus Torvalds
2007-06-08 19:21 ` Davide Libenzi
2007-06-09 0:03 ` Linus Torvalds
2007-06-09 0:13 ` Davide Libenzi
2007-06-09 0:36 ` Al Viro
2007-06-09 1:19 ` Ulrich Drepper
2007-06-09 1:41 ` Al Viro
2007-06-09 2:10 ` Ulrich Drepper
2007-06-09 15:15 ` Al Viro
2007-06-09 16:26 ` Ulrich Drepper
2007-06-09 16:54 ` Al Viro
2007-06-09 17:04 ` Davide Libenzi
2007-06-09 17:08 ` Davide Libenzi
2007-06-09 17:08 ` Ulrich Drepper [this message]
2007-06-09 17:24 ` Al Viro
2007-06-09 19:27 ` Kyle Moffett
2007-06-09 20:06 ` Al Viro
2007-06-09 20:21 ` Linus Torvalds
2007-06-09 20:31 ` Davide Libenzi
2007-06-09 21:41 ` Matt Mackall
2007-06-09 22:12 ` Davide Libenzi
2007-06-09 20:49 ` Al Viro
2007-06-09 21:55 ` Matt Mackall
2007-06-09 23:33 ` Linus Torvalds
2007-06-10 3:35 ` Davide Libenzi
2007-06-10 3:49 ` Davide Libenzi
2007-06-10 3:19 ` Al Viro
2007-06-10 3:48 ` Linus Torvalds
2007-06-10 4:00 ` Al Viro
2007-06-10 4:03 ` Linus Torvalds
2007-06-10 4:06 ` Al Viro
2007-06-10 4:45 ` dean gaudet
2007-06-10 5:06 ` Linus Torvalds
2007-06-10 5:46 ` Al Viro
2007-06-10 17:23 ` Linus Torvalds
2007-06-10 6:35 ` Kari Hurtta
2007-06-10 15:21 ` Alan Cox
2007-06-10 9:14 ` Eric Dumazet
2007-06-10 15:16 ` Alan Cox
2007-06-10 18:19 ` Linus Torvalds
2007-06-10 2:40 ` Al Viro
2007-06-08 19:34 ` Alan Cox
2007-06-08 19:30 ` Alan Cox
2007-06-08 19:37 ` Davide Libenzi
2007-06-08 19:48 ` Alan Cox
2007-06-08 19:51 ` Davide Libenzi
2007-06-08 21:24 ` Alan Cox
2007-06-08 21:59 ` Davide Libenzi
2007-06-08 22:28 ` Alan Cox
2007-06-08 22:38 ` Davide Libenzi
2007-06-11 8:24 ` Xavier Bestel
2007-06-08 19:22 ` Davide Libenzi
2007-06-09 5:41 ` Paul Mackerras
2007-06-09 14:38 ` Kyle Moffett
2007-06-10 6:48 ` Paul Mackerras
2007-06-10 15:56 ` Davide Libenzi
2007-06-10 19:16 ` Davide Libenzi
2007-06-09 17:00 ` Davide Libenzi
2007-06-10 6:26 ` Paul Mackerras
2007-06-10 7:10 ` William Lee Irwin III
2007-06-10 15:52 ` Davide Libenzi
2007-06-08 18:07 ` Davide Libenzi
2007-06-08 18:35 ` Linus Torvalds
2007-06-07 21:57 ` Davide Libenzi
2007-06-08 4:38 ` Eric Dumazet
2007-06-08 5:20 ` Davide Libenzi
2007-06-07 14:25 ` Ulrich Drepper
2007-06-07 17:56 ` Eric Dumazet
2007-06-07 18:03 ` Davide Libenzi
2007-06-07 18:57 ` Eric Dumazet
2007-06-07 18:26 ` Ulrich Drepper
2007-06-07 18:39 ` Davide Libenzi
2007-06-07 18:56 ` Ulrich Drepper
2007-06-07 19:12 ` Davide Libenzi
2007-06-07 20:03 ` Andrew Morton
2007-06-08 2:55 ` Ulrich Drepper
2007-06-08 5:16 ` Davide Libenzi
2007-06-06 23:29 ` Davide Libenzi
2007-06-07 10:06 ` Alan Cox
2007-06-07 10:45 ` Eric Dumazet
2007-06-07 11:27 ` Alan Cox
2007-06-07 15:41 ` Davide Libenzi
2007-06-07 20:10 ` Linus Torvalds
2007-06-07 20:47 ` Eric Dumazet
2007-06-07 21:08 ` Linus Torvalds
2007-06-07 21:41 ` Davide Libenzi
2007-06-07 20:59 ` Guillaume Chazarain
2007-06-07 21:06 ` Guillaume Chazarain
2007-06-07 21:31 ` Ulrich Drepper
2007-06-07 22:22 ` Davide Libenzi
2007-06-07 23:42 ` Linus Torvalds
2007-06-08 0:04 ` Davide Libenzi
2007-06-08 0:59 ` Matt Mackall
2007-06-08 2:25 ` Linus Torvalds
2007-06-08 15:56 ` Jeff Dike
2007-06-07 0:29 ` Arnd Bergmann
2007-06-07 0:33 ` Davide Libenzi
-- strict thread matches above, loose matches on Subject: below --
2007-06-06 22:30 [patch 1/8] fdmap v2 - fdmap core Davide Libenzi
2007-06-07 6:54 ` Eric Dumazet
2007-06-07 7:10 ` Davide Libenzi
2007-06-07 10:39 ` [patch 7/8] fdmap v2 - implement sys_socket2 Eric Dumazet
2007-06-07 15:42 ` Davide Libenzi
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