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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 9B688C43381 for ; Tue, 26 Mar 2019 00:55:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BCBC2075D for ; Tue, 26 Mar 2019 00:55:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730260AbfCZAy7 (ORCPT ); Mon, 25 Mar 2019 20:54:59 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:42431 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727099AbfCZAy7 (ORCPT ); Mon, 25 Mar 2019 20:54:59 -0400 Received: by mail-pg1-f196.google.com with SMTP id p6so7403722pgh.9 for ; Mon, 25 Mar 2019 17:54:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=bYSG6hUGsR8EH+eIiuJD9+PUTT4/tSHKBhZHk5Ht2hk=; b=iLUxORye4fHtZcsabyTnIeE5cfIBqNdX8Tm3N4Yzx/APSBNrRHekKYca0+VZ7yHveB nMvFxqHw8WlPr/IsT5/YunqCbwCAblpPHBZjKlnio2TZE2FY1VYzDcbOChjmgjEr5gyf rwnUoYy4P/3vSVVZiKMOACkeoxdVmZ7M3YXxt6XiTUnIK5d38CQxtnuvHWGfYnx7ho/C xrkGmF/C8vg2I/TrRdap44ExJaJkDFr6M00rCk1RN67zcjXDCFg2hY5O+V6MlIB39gbl RulvHBXAa8gYIJk5m2CgVG6U4Nn6ZFdw4/uc1+JOxyx9elg+P0/NjM0rtfEn64Oj49tx +oPQ== X-Gm-Message-State: APjAAAWM6+BxIT/v8v1wTRt79/HDCOC6wZYzbOwnXITUVxE1QM9cyJJs Dzd6kfzmkzG2KFNCqcPX3ShKVG2HSq4= X-Google-Smtp-Source: APXvYqxZMdPEv2UUqHau8gSmkvW9+wYEGrCcE7pRlJfJJb8O46ra5ZVSArLC06mv5cM3EtCPBuTB7A== X-Received: by 2002:a63:da43:: with SMTP id l3mr26571052pgj.164.1553561698307; Mon, 25 Mar 2019 17:54:58 -0700 (PDT) Received: from asus.site ([2601:647:4000:5dd1:a41e:80b4:deb3:fb66]) by smtp.gmail.com with ESMTPSA id d11sm2840928pgq.6.2019.03.25.17.54.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 Mar 2019 17:54:57 -0700 (PDT) Subject: Re: "cat /proc/lockdep" after "rmmod " when !debug_locks will crash the system To: shenghui , peterz@infradead.org, mingo@redhat.com, will.deacon@arm.com, linux-kernel@vger.kernel.org References: <5c98a345.1c69fb81.21300.0be5SMTPIN_ADDED_BROKEN@mx.google.com> <1553533600.118779.12.camel@acm.org> <5c99721b.1c69fb81.5bb69.0006SMTPIN_ADDED_BROKEN@mx.google.com> From: Bart Van Assche Message-ID: Date: Mon, 25 Mar 2019 17:54:56 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.2 MIME-Version: 1.0 In-Reply-To: <5c99721b.1c69fb81.5bb69.0006SMTPIN_ADDED_BROKEN@mx.google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/25/19 5:27 PM, shenghui wrote: > On 3/26/19 1:06 AM, Bart Van Assche wrote: >> On Mon, 2019-03-25 at 17:45 +0800, shenghui wrote: > [ 47.103637] vboxdrv: loading out-of-tree module taints kernel. > [ 47.111919] vboxdrv: Found 2 processor cores > [ 47.119013] vboxdrv: fAsync=0 offMin=0x2ee offMax=0x13f7 > [ ...........] ... > [ 47.219043] DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled) > [ 47.219055] WARNING: CPU: 0 PID: 844 at kernel/locking/lockdep.c:4142 check_flags.part.45+0x9e/0x190 > [ 47.219142] Call Trace: > [ 47.219148] lock_acquire+0x3a/0x150 > [ 47.219153] fs_reclaim_acquire.part.106+0x21/0x30 > [ 47.219156] ? fs_reclaim_acquire.part.106+0x5/0x30 > [ 47.219159] fs_reclaim_acquire+0x1d/0x20 > [ 47.219163] __kmalloc+0x4d/0x280 > [ 47.219192] ? rtR0MemAllocEx+0xaf/0x110 [vboxdrv] > [ 47.219210] ? supdrvGipInitMeasureTscFreq+0x15c/0x460 [vboxdrv] > [ 47.219229] rtR0MemAllocEx+0xaf/0x110 [vboxdrv] > [ 47.219247] ? supdrvTscDeltaThreadStartMeasurement.part.5+0x80/0x80 [vboxdrv] > [ 47.219265] VBoxHost_RTMemAllocTag+0x23/0x50 [vboxdrv] > [ 47.219284] VBoxHost_RTMpNotificationRegister+0x97/0x170 [vboxdrv] Hi Shenghui, I have not found the VBoxHost_RTMpNotificationRegister function name anywhere in the kernel tree. I think that means that this warning is generated by an out-of-tree driver. Please report this issue to the virtualbox maintainers as a kernel v5.1 interoperability bug. Thanks, Bart.