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Date: Wed, 10 Aug 2016 09:50:15 +0200 (CEST)
From: Jiri Kosina <jikos@kernel.org>
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To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
cc: "Rafael J. Wysocki" <rafael@kernel.org>,
        Thomas Garnier <thgarnie@google.com>,
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        Kees Cook <keescook@chromium.org>, Pavel Machek <pavel@ucw.cz>,
        Kernel Hardening <kernel-hardening@lists.openwall.com>,
        Borislav Petkov <bpetkov@suse.de>
Subject: Re: [Resend][PATCH] x86/power/64: Always create temporary identity
 mapping correctly
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On Wed, 10 Aug 2016, Rafael J. Wysocki wrote:

> For the lack of better ideas, below is a patch to try.
> 
> It avoids the possible issue with the restore kernel's identity mapping overlap
> with restore_jump_address by creating special super-simple page tables just
> for the final jump to the image kernel.
> 
> It is on top of the $subject patch.  My test box still works with this applied,
> but then it worked without it as well.
> 
> If it doesn't help, the identity mapping created by set_up_temporary_mappings()
> is still not adequate for some reason most likely and we'll need to find out
> why.

Unfortunately, still with $subject patch + this one, triple fault and 
reboot after reading the hibernation image.

Due to being slightly out of ideas currently, I'll play a little bit more 
with the relocation offsets to see whether that makes any difference.

-- 
Jiri Kosina
SUSE Labs