From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932237AbdJZIh1 (ORCPT ); Thu, 26 Oct 2017 04:37:27 -0400 Received: from server.eikelenboom.it ([91.121.65.215]:40842 "EHLO server.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751610AbdJZIgl (ORCPT ); Thu, 26 Oct 2017 04:36:41 -0400 Subject: Re: ce56a86e2a ("x86/mm: Limit mmap() of /dev/mem to valid physical addresses"): kernel BUG at arch/x86/mm/physaddr.c:79! To: Craig Bergstrom , Boris Ostrovsky Cc: Fengguang Wu , wfg@linux.intel.com, Ingo Molnar , linux-kernel@vger.kernel.org, LKP References: <20171024024439.u3ywfgvi67fe4mbg@wfg-t540p.sh.intel.com> From: Sander Eikelenboom Message-ID: <440615a7-6cc0-a607-ce7c-22a34b69e8fe@eikelenboom.it> Date: Thu, 26 Oct 2017 10:05:02 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/mixed; boundary="------------A7AF435A041D40A1EF6A2892" Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------A7AF435A041D40A1EF6A2892 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit On 26/10/17 00:02, Craig Bergstrom wrote: > Thanks for the notification, my apologies for the breakage. I'll take a > close look and see if I can figure out what went wrong. > > Sander, any chance you can send /proc/iomem and the inputs to the mmap call > that fail on your affected system? Hi Craig, The output from /proc/iomem is simple to get and attached. The mmap call is probably issued by qemu and will require more digging. I don't know if there is that much time left for 4.14, since we are at RC6 already. -- Sander > > > On Wed, Oct 25, 2017 at 2:50 PM, Boris Ostrovsky > wrote: > >> On 10/23/2017 10:44 PM, Fengguang Wu wrote: >>> Greetings, >>> >>> 0day kernel testing robot got the below dmesg and the first bad commit is >>> >>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >> master >>> >>> commit ce56a86e2ade45d052b3228cdfebe913a1ae7381 >>> Author: Craig Bergstrom >>> AuthorDate: Thu Oct 19 13:28:56 2017 -0600 >>> Commit: Ingo Molnar >>> CommitDate: Fri Oct 20 09:48:00 2017 +0200 >>> >>> x86/mm: Limit mmap() of /dev/mem to valid physical addresses >> >> Also note >> https://lists.xenproject.org/archives/html/xen-devel/2017-10/msg02935.html >> >> -boris >> > --------------A7AF435A041D40A1EF6A2892 Content-Type: text/plain; charset=UTF-8; name="proc-iomem" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="proc-iomem" 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