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Message-ID: <20170107074658.GC13565@gmail.com>
Date: Sat, 7 Jan 2017 08:46:58 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Andy Lutomirski <luto@...nel.org>
Cc: Thomas Garnier <thgarnie@...gle.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Arjan van de Ven <arjan@...ux.intel.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>,
Kees Cook <keescook@...omium.org>, Borislav Petkov <bp@...en8.de>,
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>, X86 ML <x86@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [RFC] x86/mm/KASLR: Remap GDTs at fixed location
* Andy Lutomirski <luto@...nel.org> wrote:
> > When I looked at the fixmap, you had to define the space you need ahead of
> > time and I am not sure there was enough space as you said.
>
> Can you try it and see if anything goes wrong? Even if something does go wrong,
> I think we should fix *that* rather than making the memory layout more
> complicated.
Absolutely! This should always be the driving principle when complicating the
kernel's memory layout.
Thanks,
Ingo
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