From: Kasper Dupont <kasperd@daimi.au.dk>
To: "David S. Miller" <davem@redhat.com>
Cc: manfred@colorfullife.com, rusty@rustcorp.com.au,
linux-kernel@vger.kernel.org
Subject: Re: [TRIVIAL] Warn users about machines with non-working WP bit
Date: Tue, 06 Aug 2002 16:03:34 +0200 [thread overview]
Message-ID: <3D4FD736.DA443B4B@daimi.au.dk> (raw)
In-Reply-To: 20020806.022813.27560736.davem@redhat.com
"David S. Miller" wrote:
>
> verify_area() checks aren't enough, consider a threaded application
> calling mprotect() while the copy is in progress.
Couldn't we just freeze all other processes with the same mm while
a copy_to_user is in progress?
Of course this should only be done if CONFIG_X86_WP_WORKS_OK is
not enabled, so systems with a working wp doesn't have to take a
performance hit.
--
Kasper Dupont -- der bruger for meget tid på usenet.
For sending spam use mailto:razrep@daimi.au.dk
or mailto:mcxumhvenwblvtl@skrammel.yaboo.dk
next prev parent reply other threads:[~2002-08-06 14:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-06 9:17 [TRIVIAL] Warn users about machines with non-working WP bit Manfred Spraul
2002-08-06 9:28 ` David S. Miller
2002-08-06 9:42 ` Manfred Spraul
2001-08-20 20:03 ` Pavel Machek
2002-08-06 14:03 ` Kasper Dupont [this message]
2002-08-06 13:56 ` David S. Miller
2002-08-06 14:16 ` Kasper Dupont
2002-08-06 14:05 ` David S. Miller
2002-08-06 14:27 ` Kasper Dupont
2002-08-06 14:36 ` Manfred Spraul
2001-08-20 20:06 ` Pavel Machek
2002-08-19 22:04 ` Alan Cox
2002-08-06 15:11 ` Kasper Dupont
2002-08-06 16:38 ` Willy Tarreau
2002-08-06 16:45 ` Zwane Mwaikambo
-- strict thread matches above, loose matches on Subject: below --
2002-08-06 3:49 Rusty Trivial Russell
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