linux-kernel - [LKP] [ovl] 24c944dd64: BUG:kernel_reboot-without-warning_in_boot

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Message-ID: <20180726002056.GJ19722@shao2-debian>
Date:   Thu, 26 Jul 2018 08:20:56 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Vivek Goyal <vgoyal@...hat.com>
Cc:     Miklos Szeredi <mszeredi@...hat.com>,
        Amir Goldstein <amir73il@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Miklos Szeredi <mszeredi@...e.cz>,
        linux-unionfs@...r.kernel.org, lkp@...org
Subject: [LKP] [ovl]  24c944dd64:
 BUG:kernel_reboot-without-warning_in_boot_stage


FYI, we noticed the following commit (built with gcc-7):

commit: 24c944dd64f807542a2ec72744c81f064d1a60da ("ovl: Modify ovl_lookup() and friends to lookup metacopy dentry")
https://git.kernel.org/cgit/linux/kernel/git/mszeredi/vfs.git overlayfs-next

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+-------------------------------------------------+------------+------------+
|                                                 | 48b3292dcd | 24c944dd64 |
+-------------------------------------------------+------------+------------+
| boot_successes                                  | 34         | 0          |
| boot_failures                                   | 10         | 48         |
| BUG:kernel_hang_in_test_stage                   | 8          |            |
| invoked_oom-killer:gfp_mask=0x                  | 2          |            |
| Mem-Info                                        | 2          |            |
| Out_of_memory:Kill_process                      | 2          |            |
| BUG:kernel_reboot-without-warning_in_boot_stage | 0          | 48         |
+-------------------------------------------------+------------+------------+



[    0.000000] BRK [0x1d3ee000, 0x1d3eefff] PGTABLE
[    0.000000] RAMDISK: [mem 0x1e73c000-0x1ffdffff]
[    0.000000] ACPI: Early table checksum verification disabled
[    0.000000] ACPI: RSDP 0x00000000000F6870 000014 (v00 BOCHS )
[    0.000000] ACPI: RSDT 0x000000001FFE1628 000030 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
BUG: kernel reboot-without-warning in boot stage

Elapsed time: 10

#!/bin/bash



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong, Chen

View attachment "config-4.18.0-rc1-00047-g24c944dd" of type "text/plain" (107772 bytes)

View attachment "job-script" of type "text/plain" (3923 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (2276 bytes)