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From: Philipp Rumpf <prumpf@mandrakesoft.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org,
	prumpf@parcelfarce.linux.theplanet.co.uk, rusty@linuxcare.com
Subject: Re: Linux 2.4.1-ac15
Date: Mon, 19 Feb 2001 10:48:28 -0600 (CST)	[thread overview]
Message-ID: <Pine.LNX.3.96.1010219104445.32729C-100000@mandrakesoft.mandrakesoft.com> (raw)
In-Reply-To: <E14UtNQ-0003rp-00@the-village.bc.nu>

On Mon, 19 Feb 2001, Alan Cox wrote:
> > So you fixed the nonexistent race only.  The real race is that the module
> 
> Umm I fixed the small race. You are right that there is a second race.

There's just one race.  The small race is nonexistent since
put_mod_name always acts as a memory barrier.

> > uninitialized vmalloc'd (module_map'd) memory), then the module data
> > (including the exception table) gets copied.
> > The race window is from the first copy_from_user in sys_init_module until
> > the second one.
> 
> Yep. Obvious answer. Ignore exception tables for modules that are not
> MOD_RUNNING.

You can have exceptions while initializing.  not
MOD_RUNNING|MOD_INITIALIZING should work though.


  reply	other threads:[~2001-02-19 16:49 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-02-15 23:15 Linux 2.4.1-ac15 Alan Cox
2001-02-19  9:47 ` Philipp Rumpf
2001-02-19 11:35   ` Alan Cox
2001-02-19 11:54     ` Philipp Rumpf
2001-02-19 16:03       ` Alan Cox
2001-02-19 16:21         ` Philipp Rumpf
2001-02-19 16:27           ` Alan Cox
2001-02-19 16:34             ` Philipp Rumpf
2001-02-19 16:41               ` Alan Cox
2001-02-19 16:48                 ` Philipp Rumpf [this message]
2001-02-19 17:03                   ` Alan Cox
2001-02-21  3:02       ` Rusty Russell
2001-02-21 12:01         ` Alan Cox
2001-02-22  2:05           ` Rusty Russell
2001-02-22 10:22             ` Alan Cox
2001-02-23  0:01               ` Philipp Rumpf
2001-02-22  2:27           ` Linus Torvalds
2001-02-22 10:29             ` Alan Cox
2001-02-23 20:40               ` Andrea Arcangeli
2001-02-23 21:09                 ` Linus Torvalds
2001-02-24  4:04                   ` Andrea Arcangeli
2001-02-24  4:54                     ` Andrea Arcangeli
2001-02-19 11:54     ` Keith Owens
2001-02-19 12:15       ` Philipp Rumpf
2001-02-19 13:15         ` Keith Owens
2001-02-19 13:25           ` Christoph Hellwig
2001-02-19 21:32             ` Keith Owens
2001-02-19 13:36           ` Philipp Rumpf
2001-02-19 15:23           ` Manfred Spraul
2001-02-19 16:04       ` Alan Cox
2001-02-19 21:52         ` Keith Owens
2001-02-20 12:29           ` Philipp Rumpf

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