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=-1.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,URIBL_SBL,URIBL_SBL_A, USER_AGENT_MUTT autolearn=ham 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 C5142C433F5 for ; Fri, 24 Aug 2018 19:18:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C87721477 for ; Fri, 24 Aug 2018 19:18:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8C87721477 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727443AbeHXWys (ORCPT ); Fri, 24 Aug 2018 18:54:48 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38066 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726808AbeHXWys (ORCPT ); Fri, 24 Aug 2018 18:54:48 -0400 Received: from localhost (5355525A.cm-6-6b.dynamic.ziggo.nl [83.85.82.90]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 7BC3FF4F; Fri, 24 Aug 2018 19:18:51 +0000 (UTC) Date: Fri, 24 Aug 2018 21:18:48 +0200 From: Greg KH To: "Matthias B." , Guenter Roeck Cc: stable@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: How to report kernel panic in 4.4.x Message-ID: <20180824191848.GB15489@kroah.com> References: <20180824142408.6340d052@ninja> <20180824125950.GA29673@kroah.com> <20180824154344.1c53a68c@ninja> <20180824141254.GB31555@kroah.com> <20180824163338.4bd9db8f@ninja> <20180824155545.GA6066@kroah.com> <20180824181919.36e6b3c7@ninja> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180824181919.36e6b3c7@ninja> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 24, 2018 at 06:19:19PM +0200, Matthias B. wrote: > Bisect identified the problem. It's the attached patch. I applied it to > 4.4.152 with patch -Rp1 and I'm running the resulting kernel now. > > MSB > > -- > For every idiot-proof system there exists at least one system-proof > idiot. > > >From 02ff2769edbce2261e981effbc3c4b98fae4faf0 Mon Sep 17 00:00:00 2001 > From: Andi Kleen > Date: Tue, 7 Aug 2018 15:09:39 -0700 > Subject: [PATCH] x86/mm/pat: Make set_memory_np() L1TF safe > > commit 958f79b9ee55dfaf00c8106ed1c22a2919e0028b upstream > > set_memory_np() is used to mark kernel mappings not present, but it has > it's own open coded mechanism which does not have the L1TF protection of > inverting the address bits. > > Replace the open coded PTE manipulation with the L1TF protecting low level > PTE routines. > > Passes the CPA self test. > > Signed-off-by: Andi Kleen > Signed-off-by: Thomas Gleixner > [ dwmw2: Pull in pud_mkhuge() from commit a00cc7d9dd, and pfn_pud() ] > Signed-off-by: David Woodhouse > [groeck: port to 4.4] > Signed-off-by: Guenter Roeck > Signed-off-by: Greg Kroah-Hartman > --- > arch/x86/include/asm/pgtable.h | 27 +++++++++++++++++++++++++++ > arch/x86/mm/pageattr.c | 8 ++++---- > 2 files changed, 31 insertions(+), 4 deletions(-) Guenter, another report of this patch causing an issue. Any ideas? I am away from test systems this weekend, but can push out patches if needed. thanks, greg k-h