kernel-hardening - Re: [Resend][PATCH] x86/power/64: Always create temporary identity mapping correctly

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Message-ID: <alpine.LNX.2.00.1608101517380.22028@cbobk.fhfr.pm>
Date: Wed, 10 Aug 2016 15:18:01 +0200 (CEST)
From: Jiri Kosina <jikos@...nel.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
cc: "Rafael J. Wysocki" <rafael@...nel.org>, 
    Thomas Garnier <thgarnie@...gle.com>, 
    Linux PM list <linux-pm@...r.kernel.org>, 
    the arch/x86 maintainers <x86@...nel.org>, 
    Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, 
    Yinghai Lu <yinghai@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
    Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>, 
    Kees Cook <keescook@...omium.org>, Pavel Machek <pavel@....cz>, 
    Kernel Hardening <kernel-hardening@...ts.openwall.com>, 
    Borislav Petkov <bpetkov@...e.de>
Subject: Re: [Resend][PATCH] x86/power/64: Always create temporary identity
 mapping correctly

On Wed, 10 Aug 2016, Rafael J. Wysocki wrote:

> The last patch I sent had a problem, because if restore_jump_address really
> overlapped with the identity mapping of the restore kernel, it might share
> PGD or PUD entries with that mapping and that should have been taken into
> account.
> 
> Here goes an update.  Again, this works on my test machine, but then the
> previous version worked on it too ...

Unfortunately still exactly the same symptoms during resume even with this 
one.

Thanks,

-- 
Jiri Kosina
SUSE Labs

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