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Date: Tue, 06 Aug 2002 16:03:34 +0200
From: Kasper Dupont <kasperd@daimi.au.dk>
Organization: daimi.au.dk
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To: "David S. Miller" <davem@redhat.com>
CC: manfred@colorfullife.com, rusty@rustcorp.com.au,
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Subject: Re: [TRIVIAL] Warn users about machines with non-working WP bit
References: <3D4F942D.7020100@colorfullife.com> <20020806.022813.27560736.davem@redhat.com>
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"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 p? usenet.
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