From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753862AbdJMAx1 (ORCPT ); Thu, 12 Oct 2017 20:53:27 -0400 Received: from mga04.intel.com ([192.55.52.120]:32220 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753305AbdJMAxY (ORCPT ); Thu, 12 Oct 2017 20:53:24 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,369,1503385200"; d="xz'?scan'208";a="1205302829" Date: Fri, 13 Oct 2017 08:51:13 +0800 From: Ye Xiaolong To: Tejun Heo Cc: Linus Torvalds , NeilBrown , Jens Axboe , Christoph Hellwig , Ming Lei , LKML , LKP Subject: Re: [lkp-robot] [blk] 47e0fb461f: BUG:unable_to_handle_kernel Message-ID: <20171013005113.GU26196@yexl-desktop> References: <20170921024603.GB8188@yexl-desktop> <87a81or0u2.fsf@notabene.neil.brown.name> <20171009160529.GG3301751@devbig577.frc2.facebook.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="R4+lwT0Y15rLnKR0" Content-Disposition: inline In-Reply-To: <20171009160529.GG3301751@devbig577.frc2.facebook.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --R4+lwT0Y15rLnKR0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On 10/09, Tejun Heo wrote: >Hello, > >On Sat, Sep 30, 2017 at 01:21:13PM -0700, Linus Torvalds wrote: >> Tejun, any ideas? The original report is at >> >> https://lkml.org/lkml/2017/9/20/939 >> >> in case you don't see it in your inbox from lkml. > >So, in the full log, there is an earlier warning. > > [ 60.198729] ------------[ cut here ]------------ > [ 60.199708] WARNING: CPU: 0 PID: 1 at drivers/ata/libata-core.c:6533 ata_host_detach+0x65/0xef > [ 60.201642] CPU: 0 PID: 1 Comm: swapper Tainted: G S 4.12.0-rc5-00126-g47e0fb46 #1 > [ 60.203370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 > [ 60.205276] task: d9b10040 task.stack: d9b0a000 > [ 60.206377] EIP: ata_host_detach+0x65/0xef > [ 60.207254] EFLAGS: 00210246 CPU: 0 > [ 60.208051] EAX: fffffffd EBX: d5f80000 ECX: 00000000 EDX: d57d6a80 > [ 60.209158] ESI: 00200282 EDI: 00000000 EBP: d9b0be70 ESP: d9b0be60 > [ 60.210262] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 > [ 60.211264] CR0: 80050033 CR2: 00000000 CR3: 02a75000 CR4: 001406b0 > [ 60.212370] Call Trace: > [ 60.213060] ata_pci_remove_one+0xe/0x10 > [ 60.213914] piix_remove_one+0x25/0x28 > [ 60.214750] pci_device_remove+0x1c/0x44 > [ 60.215607] driver_probe_device+0x188/0x34d > [ 60.216501] __driver_attach+0x64/0xb4 > [ 60.217341] bus_for_each_dev+0x4f/0x63 > [ 60.218175] driver_attach+0x14/0x16 > [ 60.218988] ? driver_probe_device+0x34d/0x34d > [ 60.219895] bus_add_driver+0xba/0x1d4 > [ 60.220721] driver_register+0x6e/0xa0 > [ 60.221562] __pci_register_driver+0x28/0x2b > [ 60.222465] ? pdc_sata_pci_driver_init+0x16/0x16 > [ 60.223406] piix_init+0x14/0x24 > [ 60.224178] do_one_initcall+0x89/0x12d > [ 60.225016] ? parse_args+0x102/0x298 > [ 60.225915] sd 1:0:0:0: [sda] 16384 512-byte logical blocks: (8.39 MB/8.00 MiB) > [ 60.227523] kernel_init_freeable+0xec/0x168 > [ 60.228421] ? rest_init+0x6a/0x6a > [ 60.229225] kernel_init+0x8/0xcb > [ 60.230003] ret_from_fork+0x19/0x30 > >It looks like somebody is trying to detach the device while async >probing is in progress, making later async operations free-after-use. >There was a driver core driver detach autotest feature which >incorrectly invoked driver detach while async probes are in progress >and this looks like that. This has already been fixed. Xialong, can >you repro this on the latest kernel? I can reproduce this warning on commit ff5abbe799e29099695cb8b5b2f198dd8b8bdf26 for 5 times run. See dmesg attached. Thanks, Xialong > >Thanks. > >-- >tejun --R4+lwT0Y15rLnKR0 Content-Type: application/octet-stream Content-Disposition: attachment; filename="dmesg-ff5abbe7.xz" Content-Transfer-Encoding: base64 /Td6WFoAAATm1rRGAgAhARYAAAB0L+Wj4LYuNYRdADKYSqt8kKSEWvAZo7Ydv/tz/AJuxJZ5 vBF30b/zsUFOhv9TudZULcPnnyAaraV0UdmWBL/0Qq2x8RyxDtkd8eDlFp664TyRWk15adee FsGoNV0CFcUhdzRTXPevHXELlFPtC9XCqAbD7WZD0oqdYn8IGUHyWzg2D4Cuctoi7REJdtQG MQOU0GRfKvEEquwcGVIdqDOtKbvR7BgV0FBFNikTajNJuJLXpRnI8mvANo4wNvWsRnIqFfQ0 xxyilt7c1YUVvIUWfZjPm/R6RCN2k4lyZ5Sb5zOPL9wgSLTTeRa1qAaB4OafsNBE1ARTH6FQ 6ejb6+boNhvTV/8Cbf4K9X8CzuEhb8ZP7Wm7D4T85gph7nHXvlaKTRxwFDgeJR1CE1puV9KP x0yq2/HXg7X1WzeuwgObWFvMYwD5kry/k3EjRQPN9FM4eSMhiz9qpUX30egSBCm1rlvrnnyW IbwfEkHVDRM3rBlzlRzzY+xN6/YiE11DlG4Mdg4UZfg6+4CaNrHvHr0AA4Z4ULgjr658HWxe 7AXSrlKxmzSQsJsqwEAKEdlK/uFH5oy3NlaMInmgQBiExVosEyw/A9Cwp1EowbFPBsiJy8dF uHBI1HbiBu3qjIyU8ZcN+NbAL1nGriIPFRA6N9sg7xmSJYYhcQ7o9/sDt5AqiHVtQnajCYaf y6n0WLPnFAfVT0tuPLsEP+TBDt5e4Tzq8dO4G8RFnQkUqYkyuDgyY8C1liKgm8+Qf/HFwcQr 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