linux-kernel - Re: [patch V163 38/51] x86/mm/64: Make a full PGD-entry size hole in the memory map

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.20.1712191914250.1780@nanos>
Date:   Tue, 19 Dec 2017 19:14:43 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirsky <luto@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Borislav Petkov <bpetkov@...e.de>,
        Greg KH <gregkh@...uxfoundation.org>, keescook@...gle.com,
        hughd@...gle.com, Brian Gerst <brgerst@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Rik van Riel <riel@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        David Laight <David.Laight@...lab.com>,
        Eduardo Valentin <eduval@...zon.com>, aliguori@...zon.com,
        Will Deacon <will.deacon@....com>, daniel.gruss@...k.tugraz.at,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...en8.de>,
        "Kirill A. Shutemov" <kirill@...temov.name>
Subject: Re: [patch V163 38/51] x86/mm/64: Make a full PGD-entry size hole
 in the memory map

On Tue, 19 Dec 2017, Thomas Gleixner wrote:

> On Mon, 18 Dec 2017, Peter Zijlstra wrote:
> 
> > On Mon, Dec 18, 2017 at 12:42:53PM +0100, Thomas Gleixner wrote:
> > > From: Andy Lutomirski <luto@...nel.org>
> > > 
> > > Shrink vmalloc space from 16384TiB to 12800TiB to enlarge the hole starting
> > > at 0xff90000000000000 to be a full PGD entry.
> > > 
> > > A subsequent patch will use this hole for the pagetable isolation LDT
> > > alias.
> > 
> > The below patch only changes 5L things, what about 4L ?
> 
> I fear I've lost a hunk somewhere on the road ....

No, that hunk never existed :)