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Re: A system for rebootless kernel security updates

From:  Tomasz Chmielewski <mangoo-AT-wpkg.org>
To:  LKML <linux-kernel-AT-vger.kernel.org>, jbarnold-AT-MIT.EDU, francois.cami-AT-free.fr, Andi Kleen <andi-AT-firstfloor.org>, mail-AT-earthworm.de
Subject:  Re: A system for rebootless kernel security updates
Date:  Thu, 24 Apr 2008 16:26:44 +0200
Message-ID:  <481098A4.50107@wpkg.org>
Archive-link:  Article

Jeff Arnold wrote:

> I've put together an automatic system for applying kernel security patches 
> to the Linux kernel without rebooting it, and I wanted to share this 
> system with the community in case others find it useful or interesting.

Hmm, the idea seem to be patented by Microsoft, i.e. this patent from 
December 2002:

http://www.google.com/patents?id=cVyWAAAAEBAJ&dq=hotp...

(and other patents by Microsoft if you search for "hotpatching").


And those patent descriptions, by the way, remind the way kexec works 
("A software module is hotpatched by loading a patch into memory and 
modifying an instruction in the original module to jump to the patch"), 
which was released much earlier... In essence, they patented kexec ;)


-- 
Tomasz Chmielewski
http://wpkg.org


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