linux-kernel - Re: [RFC] x86/mm/KASLR: Remap GDTs at fixed location

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Message-ID: <CAJcbSZE1usp6N4Ncu7=BerFmfoXF9sv0_yoGkjUo-WCaFRXeMg@mail.gmail.com>
Date:   Fri, 6 Jan 2017 10:04:47 -0800
From:   Thomas Garnier <thgarnie@...gle.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Arjan van de Ven <arjan@...ux.intel.com>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Kees Cook <keescook@...omium.org>,
        Andy Lutomirski <luto@...nel.org>, Dave Hansen <dave@...1.net>,
        Chen Yucong <slaoub@...il.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Michael Ellerman <mpe@...erman.id.au>,
        Juergen Gross <jgross@...e.com>,
        Richard Weinberger <richard@....at>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RFC] x86/mm/KASLR: Remap GDTs at fixed location

On Fri, Jan 6, 2017 at 9:44 AM, Borislav Petkov <bp@...en8.de> wrote:
> On Thu, Jan 05, 2017 at 08:40:29AM -0800, Thomas Garnier wrote:
>> > kernel_unrandomize_smp() ...
>> >
>>
>> That seems like a better name.
>
> Hardly... I'd call it something like kaslr_load_gdt() to actually say
> what this function is doing.
>

True, it loads it only for the main processor though. I will try a
variant like kaslr_load_main_gdt().

> --
> Regards/Gruss,
>     Boris.
>
> Good mailing practices for 400: avoid top-posting and trim the reply.



-- 
Thomas