linux-kernel - Re: kexec: Clearing registers just before jumping into purgatory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 11 Oct 2013 16:37:27 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Daniel Kiper <daniel.kiper@...cle.com>, ebiederm@...ssion.com,
	hbabu@...ibm.com, hpa@...ux.intel.com, keescook@...omium.org,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	david.vrabel@...rix.com, jbeulich@...e.com, keir@....org,
	xen-devel@...ts.xen.org
Subject: Re: kexec: Clearing registers just before jumping into purgatory

On Fri, Oct 11, 2013 at 08:52:06AM -0400, Vivek Goyal wrote:
> On Fri, Oct 11, 2013 at 01:04:55PM +0200, Daniel Kiper wrote:
> 
> [..]
> > > In theory you can swap between to kernels with the preserve_context
> > > case.  Technically I like the ability but I don't know that it has ever
> > > achieved much uptake.
> > 
> > I think that this is nice idea too. However, I have not seen its usage in real.
> > Even once there was an idea to remove that stuff from Linux Kernel.
> 
> I have not seen anybody using it. I don't even know if it works or not.

It works. I'm using it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/