linux-kernel - [thermal] e56a276a49: BUG: unable to handle kernel NULL pointer dereference at 0000000000000068

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Date:   Mon, 24 Oct 2016 23:12:51 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Eduardo Valentin <edubezval@...il.com>
Cc:     lkp@...org, linux-pm@...r.kernel.org,
        Eduardo Valentin <edubezval@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>
Subject: [thermal]  e56a276a49: BUG: unable to handle kernel NULL pointer
 dereference at 0000000000000068


FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal.git for-kernelci
commit e56a276a4964e4db03f4fb9e4bd2ed8d9b758352 ("thermal: core: move trips attributes to tz->device.groups")

in testcase: will-it-scale
with following parameters:

	test: readseek2
	cpufreq_governor: performance


Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.


on test machine: 32 threads Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz with 64G memory

caused below changes:


+------------------------------------------------------------------+------------+------------+
|                                                                  | 18d4bde085 | e56a276a49 |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 0          | 0          |
| boot_failures                                                    | 3          | 16         |
| invoked_oom-killer:gfp_mask=0x                                   | 3          | 2          |
| Mem-Info                                                         | 3          | 2          |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 3          | 2          |
| BUG:unable_to_handle_kernel                                      | 0          | 3          |
| RIP:kernfs_find_ns                                               | 0          | 11         |
| calltrace:pkg_temp_thermal_init                                  | 0          | 12         |
| calltrace:SyS_finit_module                                       | 0          | 13         |
| Oops                                                             | 0          | 9          |
| Kernel_panic-not_syncing:Fatal_exception                         | 0          | 11         |
| WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup                        | 0          | 1          |
| calltrace:parport_pc_init                                        | 0          | 1          |
| WARNING:at_lib/kobject.c:#kobject_add_internal                   | 0          | 1          |
| BUG:kernel_reboot-without-warning_in_test_stage                  | 0          | 1          |
+------------------------------------------------------------------+------------+------------+



ted Remount Root and Kernel File Systems.
         Starting Load/Save Random Seed...
         
[   16.264618] BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
Starting udev Co
[   16.274814] IP:ld plug all Devic[<ffffffff812946b3>] kernfs_find_ns+0x13/0xd0
[   16.284341] PGD 0 es...
[   16.294657] Modules linked in:ed  Configurationx86_pkg_temp_thermal(+) intel_powerclamp coretemp File System.
[   16.351433] CPU: 16 PID: 444 Comm: systemd-udevd Not tainted 4.9.0-rc1-00014-ge56a276 #1
Create Static De
[   16.360475] Hardware name: Intel Corporation S2600CP/S2600CP, BIOS SE5C600.86B.99.99.x036.091920111209 09/19/2011
[   16.373467] task: ffff88080d4c8000 task.stack: ffffc90007b74000
vice Nodes in /d
[   16.380073] RIP: 0010:[<ffffffff812946b3>]  [<ffffffff812946b3>] kernfs_find_ns+0x13/0xd0
[   16.390770] RSP: 0018:ffffc90007b77ac8  EFLAGS: 00010246
ev.
[   16.406212] RDX: 0000000000000000 RSI: ffffffff81a926a0 RDI: 0000000000000000
[   16.416752] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Kernel Test Robot

View attachment "config-4.9.0-rc1-00014-ge56a276" of type "text/plain" (153709 bytes)

View attachment "job-script" of type "text/plain" (6573 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (19596 bytes)

View attachment "job.yaml" of type "text/plain" (4156 bytes)