linux-kernel - [driver core] eedc73d4f3: BUG:kernel_reboot-without-warning_in_boot

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Date:   Wed, 29 Sep 2021 23:02:40 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     0day robot <lkp@...el.com>, Abaci Robot <abaci@...ux.alibaba.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        gregkh@...uxfoundation.org, Yang Li <yang.lee@...ux.alibaba.com>
Subject: [driver core]  eedc73d4f3:
 BUG:kernel_reboot-without-warning_in_boot_stage



Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: eedc73d4f330cf7a8d18d64f327837ae9a00d003 ("[PATCH] driver core: Switch to using the new API kobj_to_dev()")
url: https://github.com/0day-ci/linux/commits/Yang-Li/driver-core-Switch-to-using-the-new-API-kobj_to_dev/20210929-102216
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 5816b3e6577eaa676ceb00a848f0fd65fe2adc29

in testcase: rcutorture
version: 
with following parameters:

	runtime: 300s
	test: cpuhotplug
	torture_type: tasks

test-description: rcutorture is rcutorture kernel module load/unload test.
test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt


on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

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


+--------------------------------------------------------------------+-----------+------------+
|                                                                    | v5.15-rc3 | eedc73d4f3 |
+--------------------------------------------------------------------+-----------+------------+
| boot_successes                                                     | 221       | 0          |
| BUG:kernel_reboot-without-warning_in_boot_stage                    | 0         | 7          |
+--------------------------------------------------------------------+-----------+------------+


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


[    1.879942][   T17] kvm-guest: stealtime: cpu 1, msr b4fe9b40
[    1.883976][    T1] smp: Brought up 1 node, 2 CPUs
[    1.884516][    T1] smpboot: Max logical packages: 2
[    1.884997][    T1] smpboot: Total of 2 processors activated (8782.62 BogoMIPS)
[    1.887450][    T1] devtmpfs: initialized
BUG: kernel reboot-without-warning in boot stage

Kboot worker: lkp-worker43
Elapsed time: 60

kvm=(


To reproduce:

        # build kernel
	cd linux
	cp config-5.15.0-rc3-00001-geedc73d4f330 .config
	make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage

        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

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



---
0DAY/LKP+ Test Infrastructure                   Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org       Intel Corporation

Thanks,
Oliver Sang


View attachment "config-5.15.0-rc3-00001-geedc73d4f330" of type "text/plain" (147162 bytes)

View attachment "job-script" of type "text/plain" (4840 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (6396 bytes)