linux-kernel - e00164a0f0 [ 7.566387] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:1025 lockdep_register

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Message-ID: <20190417003327.GI24200@shao2-debian>
Date:   Wed, 17 Apr 2019 08:33:27 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Guoqing Jiang <gqjiang@...e.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: e00164a0f0 [    7.566387] WARNING: CPU: 0 PID: 1 at
 kernel/locking/lockdep.c:1025 lockdep_register_key

Greetings,

0day kernel testing robot got the below dmesg and the first bad commit is

https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-linus

commit e00164a0f000de893944981f41a568c981aca658
Author:     Guoqing Jiang <gqjiang@...e.com>
AuthorDate: Tue Apr 9 16:16:38 2019 +0800
Commit:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CommitDate: Tue Apr 16 15:24:38 2019 +0200

    sc16is7xx: move label 'err_spi' to correct section
    
    err_spi is used when SERIAL_SC16IS7XX_SPI is enabled, so make
    the label only available under SERIAL_SC16IS7XX_SPI option.
    Otherwise, the below warning appears.
    
    drivers/tty/serial/sc16is7xx.c:1523:1: warning: label ‘err_spi’ defined but not used [-Wunused-label]
     err_spi:
      ^~~~~~~
    
    Signed-off-by: Guoqing Jiang <gqjiang@...e.com>
    Fixes: ac0cdb3d9901 ("sc16is7xx: missing unregister/delete driver on error in sc16is7xx_init()")
    Signed-off-by: Arnd Bergmann <arnd@...db.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

6b87784b53  serial: sh-sci: Fix HSCIF RX sampling point adjustment
e00164a0f0  sc16is7xx: move label 'err_spi' to correct section
+-----------------------------------------------------------+------------+------------+
|                                                           | 6b87784b53 | e00164a0f0 |
+-----------------------------------------------------------+------------+------------+
| boot_successes                                            | 201        | 32         |
| boot_failures                                             | 1          | 3          |
| BUG:soft_lockup-CPU##stuck_for#s                          | 1          |            |
| EIP:event_create_dir                                      | 1          |            |
| Kernel_panic-not_syncing:softlockup:hung_tasks            | 1          |            |
| WARNING:at_kernel/locking/lockdep.c:#lockdep_register_key | 0          | 3          |
| EIP:lockdep_register_key                                  | 0          | 3          |
+-----------------------------------------------------------+------------+------------+

If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp@...el.com>

[    7.510650] IPMI poweroff: Copyright (C) 2004 MontaVista Software - IPMI Powerdown via sys_reboot
[    7.534084] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    7.545328] ACPI: Power Button [PWRF]
[    7.554398] Warning: Processor Platform Limit event detected, but not handled.
[    7.563385] Consider compiling CPUfreq support into your kernel.
[    7.566387] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:1025 lockdep_register_key+0x100/0x110
[    7.569720] CPU: 0 PID: 1 Comm: swapper Not tainted 5.1.0-rc3-00003-ge00164a #237
[    7.571684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[    7.573298] EIP: lockdep_register_key+0x100/0x110
[    7.573298] Code: 0c 2c 6f 5c 85 c0 0f 85 52 ff ff ff 68 85 54 16 5c 68 84 1f 13 5c e8 2f a4 fc ff 0f 0b 59 5b e9 3a ff ff ff 8d b6 00 00 00 00 <0f> 0b 8d 65 f8 5b 5e 5d c3 8d b4 26 00 00 00 00 55 89 e5 57 56 53
[    7.573298] EAX: 00000001 EBX: 5d5406a4 ECX: 5c7ec208 EDX: 5d5406a4
[    7.573298] ESI: 00000018 EDI: 5d5406c4 EBP: 40255ef4 ESP: 40255eec
[    7.573298] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210202
[    7.573298] CR0: 80050033 CR2: 00000000 CR3: 1c7de000 CR4: 00000690
[    7.573298] Call Trace:
[    7.573298]  ? alloc_workqueue+0xeb/0x380
[    7.573298]  ? acpi_container_init+0x19/0x19
[    7.573298]  ? acpi_thermal_init+0x3d/0x74
[    7.573298]  ? do_one_initcall+0x6d/0x14b
[    7.573298]  ? kernel_init_freeable+0xda/0x176
[    7.573298]  ? kernel_init_freeable+0xfc/0x176
[    7.573298]  ? rest_init+0x100/0x100
[    7.573298]  ? kernel_init+0xd/0xf0
[    7.573298]  ? ret_from_fork+0x19/0x30
[    7.573298] random: get_random_bytes called from init_oops_id+0x3f/0x50 with crng_init=1
[    7.573298] ---[ end trace 545f90114983ba96 ]---
[    7.828642] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled

                                                          # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start e00164a0f000de893944981f41a568c981aca658 79a3aaa7b82e3106be97842dedfd8429248896e6 --
git bisect good ace965696da2611af759f0284e26342b7b6cec89  # 22:48  G     65     0    0   0  serial: sh-sci: Fix HSCIF RX sampling point calculation
git bisect good 6b87784b53592a90d21576be8eff688b56d93cce  # 23:03  G     66     0    0   0  serial: sh-sci: Fix HSCIF RX sampling point adjustment
# first bad commit: [e00164a0f000de893944981f41a568c981aca658] sc16is7xx: move label 'err_spi' to correct section
git bisect good 6b87784b53592a90d21576be8eff688b56d93cce  # 23:11  G    196     0    1   1  serial: sh-sci: Fix HSCIF RX sampling point adjustment
# extra tests on HEAD of tty/tty-linus
git bisect  bad e00164a0f000de893944981f41a568c981aca658  # 23:11  B     32     3    0   0  sc16is7xx: move label 'err_spi' to correct section
# extra tests on tree/branch tty/tty-linus
git bisect  bad e00164a0f000de893944981f41a568c981aca658  # 23:18  B     32     3    0   0  sc16is7xx: move label 'err_spi' to correct section
# extra tests with first bad commit reverted
git bisect good a3d4c63910ec84ad8387b4a83aa6e0901e2f3888  # 23:38  G     63     0    0   0  Revert "sc16is7xx: move label 'err_spi' to correct section"

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/lkp                          Intel Corporation

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