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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 3310AC433E0 for ; Thu, 28 May 2020 18:49:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 12FAD2078C for ; Thu, 28 May 2020 18:49:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 12FAD2078C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9AA168001A; Thu, 28 May 2020 14:49:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9332380010; Thu, 28 May 2020 14:49:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 822478001A; Thu, 28 May 2020 14:49:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0008.hostedemail.com [216.40.44.8]) by kanga.kvack.org (Postfix) with ESMTP id 6563380010 for ; Thu, 28 May 2020 14:49:02 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 1E559B41CA for ; Thu, 28 May 2020 18:49:02 +0000 (UTC) X-FDA: 76867014924.14.table93_6be5f6a86ed47 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin14.hostedemail.com (Postfix) with ESMTP id DE17818076C28 for ; Thu, 28 May 2020 18:49:01 +0000 (UTC) X-HE-Tag: table93_6be5f6a86ed47 X-Filterd-Recvd-Size: 2044 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Thu, 28 May 2020 18:49:01 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id F2A7AAB5C; Thu, 28 May 2020 18:48:58 +0000 (UTC) Date: Thu, 28 May 2020 20:48:57 +0200 From: Joerg Roedel To: kernel test robot Cc: Andrew Morton , Linux Memory Management List , LKP Subject: Re: 0604a4fd53 ("x86/mm: remove vmalloc faulting"): [ 80.661587] BUG: unable to handle page fault for address: fb40c000 Message-ID: <20200528184857.GE6857@suse.de> References: <20200528084208.GV12456@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200528084208.GV12456@shao2-debian> User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Queue-Id: DE17818076C28 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi, On Thu, May 28, 2020 at 04:42:09PM +0800, kernel test robot 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/next/linux-next.git master > > commit 0604a4fd53020a98f029e7fd56d896a136ff2357 > Author: Joerg Roedel > AuthorDate: Sat May 16 15:19:37 2020 +1000 > Commit: Stephen Rothwell > CommitDate: Sat May 16 15:19:37 2020 +1000 Tried to reproduce this today and found another bug in KVM along the way. But anyway, I wasn't able to reproduce this on latest linux-next. By looking at the exact commit-id reported above, I found that this report is a false-positive. Above commit-id refers to an old version of the patch-set which does not call arch_sync_kernel_mappings() in map_kernel_range_noflush(). So the oops comes from missing synchronization there. But that is fixed already in latest next/master. Regards, Joerg