From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751610AbdIOAME (ORCPT ); Thu, 14 Sep 2017 20:12:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:39190 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751517AbdIOAMD (ORCPT ); Thu, 14 Sep 2017 20:12:03 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2BC6D21BCE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=mhiramat@kernel.org Date: Thu, 14 Sep 2017 17:12:01 -0700 From: Masami Hiramatsu To: kernel test robot Cc: Ingo Molnar , "Paul E . McKenney" , Steven Rostedt , linux-kernel@vger.kernel.org, Peter Zijlstra , Ananth N Mavinakayanahalli , Thomas Gleixner , "H . Peter Anvin" , lkp@01.org Subject: Re: [lkp-robot] [kprobes] e1ce3eee7d: BUG:using_smp_processor_id()in_preemptible Message-Id: <20170914171201.8c4e5c992b06896b595799dd@kernel.org> In-Reply-To: <20170914042832.GB17166@yexl-desktop> References: <150517865165.26279.7811625865051741769.stgit@devbox> <20170914042832.GB17166@yexl-desktop> X-Mailer: Sylpheed 3.5.0 (GTK+ 2.24.30; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 14 Sep 2017 12:28:32 +0800 kernel test robot wrote: > > FYI, we noticed the following commit: > > commit: e1ce3eee7dcda03f2b2f2d64e2cb2f3a993a3b34 ("kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT") > url: https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/kprobes-Use-synchronize_rcu_tasks-for-optprobe-with-CONFIG_PREEMPT/20170913-034557 > > > in testcase: boot > > on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 512M > > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): Hmm, I still couldn't reproduce this bug in my environment... I found suspicious code, but it doesn't cause below BUG yet. I've made a kernel with given config (but change all =m to =n, since kbuild builds modules even if I specify bzImage as the target, possibly a kbuild bug?) BTW, above test command seems not enough, since there is no kernel and kernel parameters specified. Thank you, > > > +--------------------------------------------+------------+------------+ > | | 80cee03bf1 | e1ce3eee7d | > +--------------------------------------------+------------+------------+ > | boot_successes | 28 | 5 | > | boot_failures | 0 | 23 | > | BUG:using_smp_processor_id()in_preemptible | 0 | 23 | > +--------------------------------------------+------------+------------+ > > > > [ 14.675660] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1 > [ 14.700932] caller is debug_smp_processor_id+0x17/0x20 > [ 14.725623] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.13.0-06467-ge1ce3ee #2 > [ 14.729560] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 > [ 14.772244] Call Trace: > [ 14.772244] dump_stack+0x65/0x87 > [ 14.772244] check_preemption_disabled+0xda/0xe0 > [ 14.772244] debug_smp_processor_id+0x17/0x20 > [ 14.772244] optimized_callback+0x1f/0xf0 > [ 14.772244] 0xffffffffa0002370 > [ 14.772244] ? init_test_probes+0x2cf/0x530 > [ 14.772244] init_kprobes+0x1e6/0x1f1 > [ 14.772244] ? debugfs_kprobe_init+0xa5/0xa5 > [ 14.772244] do_one_initcall+0x4e/0x190 > [ 14.772244] kernel_init_freeable+0x113/0x194 > [ 14.772244] ? rest_init+0x130/0x130 > [ 14.772244] kernel_init+0x9/0xf2 > [ 14.772244] ret_from_fork+0x25/0x30 > [ 16.007679] Kprobe smoke test: passed successfully > [ 16.025466] Initialise system trusted keyrings > [ 16.062596] workingset: timestamp_bits=46 max_order=17 bucket_order=0 > [ 16.151965] efs: 1.0a - http://aeschi.ch.eu.org/efs/ > [ 16.164959] fuse init (API version 7.26) > [ 16.183177] orangefs_debugfs_init: called with debug mask: :none: :0: > [ 16.196644] orangefs_init: module version upstream loaded > [ 16.209245] NILFS version 2 loaded > [ 16.226230] gfs2: GFS2 installed > [ 16.326266] NET: Registered protocol family 38 > [ 16.344018] Key type asymmetric registered > [ 16.353442] Asymmetric key parser 'x509' registered > [ 16.364981] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249) > [ 16.382476] io scheduler noop registered > [ 16.392812] io scheduler cfq registered (default) > [ 16.405978] test_printf: all 260 tests passed > [ 16.432644] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64 > [ 16.443171] crc32: self tests passed, processed 225944 bytes in 2307458 nsec > [ 16.456977] crc32c: CRC_LE_BITS = 64 > [ 16.464432] crc32c: self tests passed, processed 225944 bytes in 620214 nsec > [ 16.636881] crc32_combine: 8373 self tests passed > [ 16.770158] crc32c_combine: 8373 self tests passed > [ 16.784290] switchtec: loaded. > [ 16.791607] rivafb_setup START > [ 16.801335] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 > [ 16.817701] ACPI: Power Button [PWRF] > [ 16.848025] HDLC line discipline maxframe=4096 > [ 16.859952] N_HDLC line discipline registered. > [ 16.874756] r3964: Philips r3964 Driver $Revision: 1.10 $ > [ 16.886652] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled > [ 16.983539] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A > [ 17.114800] 00:06: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A > [ 17.138674] MOXA Intellio family driver version 6.0k > [ 17.151640] SyncLink serial driver $Revision: 4.38 $ > [ 17.232501] SyncLink serial driver $Revision: 4.38 $, tty major#244 > [ 17.248116] Non-volatile memory driver v1.3 > [ 17.258912] telclk_interrupt = 0xf non-mcpbl0010 hw. > [ 17.304320] Floppy drive(s): fd0 is 2.88M AMI BIOS > [ 17.309997] loop: module loaded > [ 17.344349] null: module loaded > [ 17.352804] dummy-irq: no IRQ given. Use irq=N > [ 17.365157] Silicon Labs C2 port support v. 0.51.0 - (C) 2007 Rodolfo Giometti > [ 17.381691] FDC 0 is a S82078B > [ 17.395387] c2port c2port0: C2 port uc added > [ 17.405402] c2port c2port0: uc flash has 30 blocks x 512 bytes (15360 bytes total) > [ 17.425464] Uniform Multi-Platform E-IDE driver > [ 17.437073] Loading iSCSI transport class v2.0-870. > [ 17.455730] aic94xx: Adaptec aic94xx SAS/SATA driver version 1.0.3 loaded > [ 17.478968] iscsi: registered transport (qla4xxx) > [ 17.492261] QLogic iSCSI HBA Driver > [ 17.502789] mpt3sas version 15.100.00.00 loaded > [ 17.516825] VMware PVSCSI driver - version 1.0.7.0-k > [ 17.568251] scsi host0: scsi_debug: version 1.86 [20160430] > [ 17.568251] dev_size_mb=8, opts=0x0, submit_queues=1, statistics=0 > [ 17.599319] scsi 0:0:0:0: Direct-Access Linux scsi_debug 0186 PQ: 0 ANSI: 7 > [ 17.622753] scsi 0:0:0:0: Attached scsi generic sg0 type 0 > [ 17.652924] platform physmap-flash.0: failed to claim resource 0: [mem 0x08000000-0x07ffffff] > [ 17.672329] slram: not enough parameters. > [ 17.687505] ftl_cs: FTL header not found. > [ 17.717310] vcan: Virtual CAN interface driver > [ 17.737307] slcan: serial line CAN interface driver > [ 17.753216] slcan: 10 dynamic interface channels. > [ 17.766066] CAN device driver interface > [ 17.781333] cc770: CAN netdevice driver > [ 17.793582] cc770_isa: insufficient parameters supplied > [ 17.811761] ena: Elastic Network Adapter (ENA) v1.2.0k > [ 17.838306] Intel(R) Ethernet Switch Host Interface Driver - version 0.21.7-k > [ 17.860645] Copyright(c) 2013 - 2017 Intel Corporation. > [ 17.883557] ns83820.c: National Semiconductor DP83820 10/100/1000 driver. > [ 17.902174] nfp: NFP PCIe Driver, Copyright (C) 2014-2017 Netronome Systems > [ 17.923819] PPP generic driver version 2.4.2 > [ 17.938243] PPP Deflate Compression module registered > [ 17.955252] PPP MPPE Compression module registered > [ 17.971135] Fusion MPT base driver 3.04.20 > [ 17.983899] Copyright (c) 1999-2008 LSI Corporation > [ 17.999048] Fusion MPT SPI Host driver 3.04.20 > [ 18.023653] Fusion MPT SAS Host driver 3.04.20 > [ 18.052566] Fusion MPT misc device (ioctl) driver 3.04.20 > [ 18.083344] mptctl: Registered with Fusion MPT base driver > [ 18.098123] mptctl: /dev/mptctl @ (major,minor=10,220) > [ 18.124512] aoe: AoE v85 initialised. > [ 18.137382] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12 > [ 18.170754] serio: i8042 KBD port at 0x60,0x64 irq 1 > > > To reproduce: > > git clone https://github.com/intel/lkp-tests.git > cd lkp-tests > bin/lkp qemu -k job-script # job-script is attached in this email > > > > Thanks, > Xiaolong -- Masami Hiramatsu