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Date:   Sat, 14 Jul 2018 07:09:09 +0200
From:   Joerg Roedel <jroedel@suse.de>
To:     Andy Lutomirski <luto@kernel.org>
Cc:     Joerg Roedel <joro@8bytes.org>,
        Thomas Gleixner <tglx@linutronix.de>,
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Subject: Re: [PATCH 39/39] x86/entry/32: Add debug code to check entry/exit
 cr3
Message-ID: <20180714050909.z4wohvvlbpaksbd5@suse.de>
References: <1531308586-29340-1-git-send-email-joro@8bytes.org>
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 <CALCETrUw5DTnPtDK5TUNv4z50rrmcxwPA-KqtBHcWRcazJXy6Q@mail.gmail.com>
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On Fri, Jul 13, 2018 at 10:28:50AM -0700, Andy Lutomirski wrote:
> On Wed, Jul 11, 2018 at 4:29 AM, Joerg Roedel <joro@8bytes.org> wrote:
> > From: Joerg Roedel <jroedel@suse.de>
> >
> > Add a config option that enabled code to check that we enter
> > and leave the kernel with the correct cr3. This is needed
> > because we have no NX protection of user-addresses in the
> > kernel-cr3 on x86-32 and wouldn't notice that type of bug
> > otherwise.
> >
> 
> I like this, but could you make it just use CONFIG_DEBUG_ENTRY?

Makes sense, I'll change it.


Regards,

	Joerg