linux-kernel - Re: [PATCH] hibernation: on 32-bit x86, disabled in favor of KASLR

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Date:   Thu, 23 Mar 2017 02:10:12 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>,
        Evgenii Shatokhin <eugene.shatokhin@...dex.ru>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] hibernation: on 32-bit x86, disabled in favor of KASLR

On Thu, Mar 23, 2017 at 1:27 AM, Kees Cook <keescook@...omium.org> wrote:
> This is a modified revert of commit 65fe935dd238 ("x86/KASLR, x86/power:
> Remove x86 hibernation restrictions"), since it appears that 32-bit
> hibernation still can't support KASLR. 64-bit is fine. Since people have
> been running with KASLR by default on 32-bit since v4.8, this disables
> hibernation (with a warning). Booting with "nokaslr" will disable KASLR
> and enable hibernation.
>
> Reported-by: Evgenii Shatokhin <eugene.shatokhin@...dex.ru>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Cc: stable@...r.kernel.org # v4.8+

LGTM

Thanks,
Rafael