Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750950AbdLaCX3 (ORCPT ); Sat, 30 Dec 2017 21:23:29 -0500 Received: from mail-pf0-f173.google.com ([209.85.192.173]:45482 "EHLO mail-pf0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750806AbdLaCX2 (ORCPT ); Sat, 30 Dec 2017 21:23:28 -0500 X-Google-Smtp-Source: ACJfBovzr/sqY+Nm2E5Wt3t9r8NMQTHYE6LitFBFgov1j2n/jJAaQjsWSg1WsIZ27yAf3eeIXBWtnQ== Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (1.0) Subject: Re: [patch 0/3] x86/pti: Fix various fallout From: Andy Lutomirski X-Mailer: iPhone Mail (15C153) In-Reply-To: Date: Sat, 30 Dec 2017 18:23:24 -0800 Cc: Ingo Molnar , Thomas Gleixner , LKML , the arch/x86 maintainers , Andy Lutomirski , Dave Hansen , Peter Zijlstra , Borislav Petkov , Dominik Brodowski Message-Id: References: <20171230211351.980176980@linutronix.de> <20171230213555.gu7mtzwp6gwzaza2@gmail.com> To: Linus Torvalds Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id vBV2ODoZ025363 Content-Length: 873 Lines: 21 > On Dec 30, 2017, at 2:06 PM, Linus Torvalds wrote: > >> On Sat, Dec 30, 2017 at 1:35 PM, Ingo Molnar wrote: >> >> Linus, I suspect -rc6 is imminent, and it would be nice to at least have the LDT >> error path fix in. I'll send you these fixes tomorrow, but feel free to pick it up >> from email if you wanted to release -rc6 today. > > I'll do rc6 tomorrow probably around this time (early afternoon PST). > So I think I should be ok just waiting for your pull request. FWIW, I think this big is at worst just a memory leak. Once an mm has any LDT mapped, mapping a second one can't fail because the entire LDT area is under 512 pages, meaning that nothing needs to be allocated, so there's no opportunity for failure. So it's an embarrassing bug, but not catastrophic. > > Thanks, > > Linus