linux-kernel - Re: [PATCH 3/3] PCI/sysfs: Fix sysfs init race condition

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Date:   Sat, 29 Apr 2023 10:42:45 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Alexander Stein <alexander.stein@...tq-group.com>
CC:     <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
        <linux-pci@...r.kernel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        <linux-kernel@...r.kernel.org>,
        Korneliusz Osmenda <korneliuszo@...il.com>,
        Oliver Neukum <oneukum@...e.com>, <oliver.sang@...el.com>
Subject: Re: [PATCH 3/3] PCI/sysfs: Fix sysfs init race condition


Hello,

kernel test robot noticed "BUG:kernel_hang_in_boot_stage" on:

commit: 931bc7f7debcbd7470fa92361f58e5f9dbe57cb0 ("[PATCH 3/3] PCI/sysfs: Fix sysfs init race condition")
url: https://github.com/intel-lab-lkp/linux/commits/Alexander-Stein/PCI-sysfs-sort-headers-alphabetically/20230427-223059
base: https://git.kernel.org/cgit/linux/kernel/git/pci/pci.git next
patch link: https://lore.kernel.org/all/20230427142901.3570536-4-alexander.stein@ew.tq-group.com/
patch subject: [PATCH 3/3] PCI/sysfs: Fix sysfs init race condition

in testcase: boot

compiler: gcc-11
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+-------------------------------+------------+------------+
|                               | cbc7787301 | 931bc7f7de |
+-------------------------------+------------+------------+
| boot_successes                | 20         | 0          |
| boot_failures                 | 0          | 18         |
| BUG:kernel_hang_in_boot_stage | 0          | 18         |
+-------------------------------+------------+------------+


If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202304291030.4bd687ba-oliver.sang@intel.com


[ 1.377768][ T1] pci 0000:00:03.0: quirk_igfx_skip_te_disable+0x0/0xb0 took 0 usecs 
[    1.381714][    T1] pci 0000:00:04.0: [8086:25ab] type 00 class 0x088000
[    1.384180][    T1] pci 0000:00:04.0: reg 0x10: [mem 0xfebf1000-0xfebf100f]
[ 1.390202][ T1] pci 0000:00:04.0: calling quirk_igfx_skip_te_disable+0x0/0xb0 @ 1 
[ 1.391825][ T1] pci 0000:00:04.0: quirk_igfx_skip_te_disable+0x0/0xb0 took 0 usecs 
BUG: kernel hang in boot stage

Kboot worker: lkp-worker07
Elapsed time: 1020

kvm=(


To reproduce:

        # build kernel
	cd linux
	cp config-6.3.0-rc1-00075-g931bc7f7debc .config
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> -m modules.cgz 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.



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests



View attachment "config-6.3.0-rc1-00075-g931bc7f7debc" of type "text/plain" (157285 bytes)

View attachment "job-script" of type "text/plain" (4827 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (11160 bytes)