From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71FFBC433FF for ; Wed, 14 Aug 2019 07:57:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 554A1205C9 for ; Wed, 14 Aug 2019 07:57:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726383AbfHNH5y (ORCPT ); Wed, 14 Aug 2019 03:57:54 -0400 Received: from mx2.suse.de ([195.135.220.15]:33438 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725928AbfHNH5y (ORCPT ); Wed, 14 Aug 2019 03:57:54 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 2CD97ACBD; Wed, 14 Aug 2019 07:57:53 +0000 (UTC) Date: Wed, 14 Aug 2019 09:57:51 +0200 From: Joerg Roedel To: Greg Kroah-Hartman Cc: Joerg Roedel , stable@vger.kernel.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3 5.2-stable] Sync mappings in vmalloc/ioremap areas Message-ID: <20190814075751.GC9222@suse.de> References: <20190813152814.5354-1-joro@8bytes.org> <20190813183642.GC6582@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190813183642.GC6582@kroah.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org Archived-At: List-Archive: List-Post: Hi Greg, On Tue, Aug 13, 2019 at 08:36:42PM +0200, Greg Kroah-Hartman wrote: > On Tue, Aug 13, 2019 at 05:28:11PM +0200, Joerg Roedel wrote: > > From: Joerg Roedel > > > > Backport commits from upstream to fix a data corruption > > issue that gets exposed when using PTI on x86-32. > > > > Please consider them for inclusion into stable-5.2. > > Thanks for these. Based on the Fixes: tags on the commits, I've taken > them all the way back to 4.4.y. Thank you! The problem almost only exposes itself when PTI on x86-32 is enabled (which was merged in 4.19), so I only backported down to that kernel. But it is right that it might be possible to trigger the problem on older kernels too, e.g. in some 32bit XEN-pv configurations that use same PAE page-table structures as the PTI code for 32bit. So thanks for picking the fixes up for the older kernels too. Regards, Joerg