linux-kernel - [driver core] 9c28a17954: WARNING:at_kernel/events/core.c:#perf_event_sysfs

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Date:   Fri, 2 Oct 2020 15:52:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     poeschel@...onage.de
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Lars Poeschel <poeschel@...onage.de>,
        0day robot <lkp@...el.com>, lkp@...ts.01.org,
        rui.zhang@...el.com, yu.c.chen@...el.com
Subject: [driver core] 9c28a17954:
 WARNING:at_kernel/events/core.c:#perf_event_sysfs_init

Greeting,

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

commit: 9c28a17954f000e148b7863d4c5efa8fd3d80f4f ("[PATCH] driver core: Remove double assignment")
url: https://github.com/0day-ci/linux/commits/poeschel-lemonage-de/driver-core-Remove-double-assignment/20200929-195945
base: https://git.kernel.org/cgit/linux/kernel/git/gregkh/driver-core.git e5e5fcef600e94d83c6542cdcca3ab6dada95946

in testcase: suspend-stress
version: 
with following parameters:

	mode: mem
	iterations: 10



on test machine: 4 threads Ivy Bridge with 4G memory

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



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


kern  :warn  : [    5.897345] WARNING: CPU: 3 PID: 1 at kernel/events/core.c:12993 perf_event_sysfs_init+0x5d/0x81
kern  :warn  : [    5.897666] Modules linked in:
kern  :warn  : [    5.897825] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc5-00023-g9c28a17954f000 #1
kern  :warn  : [    5.898127] Hardware name: TOSHIBA PORTEGE Z830/PORTEGE Z830, BIOS Version 2.30   07/12/2012
kern  :warn  : [    5.898441] RIP: 0010:perf_event_sysfs_init+0x5d/0x81
kern  :warn  : [    5.898637] Code: 83 7b 30 00 74 26 83 7b 38 00 78 20 48 89 df e8 d7 9c 52 fe 89 c2 85 c0 74 12 48 8b 73 30 48 c7 c7 98 96 35 82 e8 83 c3 3a fe <0f> 0b 48 8b 1b eb c5 c7 05 24 1f 3c 00 01 00 00 00 48 c7 c7 40 ac
kern  :warn  : [    5.899196] RSP: 0000:ffffc90000033e18 EFLAGS: 00010286
kern  :warn  : [    5.899399] RAX: 0000000000000000 RBX: ffffffff82617020 RCX: 000000000000054a
kern  :warn  : [    5.899634] RDX: 0000000000000001 RSI: 0000000000000086 RDI: ffffffff82fb882c
kern  :warn  : [    5.899870] RBP: ffffffff82d335c2 R08: 000000000000054a R09: 000000000000ffa0
kern  :warn  : [    5.900106] R10: 0000000000000737 R11: ffffc90000033cc5 R12: 0000000000000000
kern  :warn  : [    5.900343] R13: ffff888107462800 R14: 0000000000000000 R15: 0000000000000000
kern  :warn  : [    5.900583] FS:  0000000000000000(0000) GS:ffff88811e6c0000(0000) knlGS:0000000000000000
kern  :warn  : [    5.900886] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern  :warn  : [    5.901094] CR2: 0000000000000000 CR3: 000000000260a001 CR4: 00000000001706e0
kern  :warn  : [    5.901330] Call Trace:
kern  :warn  : [    5.901481]  do_one_initcall+0x46/0x204
kern  :warn  : [    5.901655]  kernel_init_freeable+0x1da/0x23c
kern  :warn  : [    5.901839]  ? rest_init+0xc6/0xc6
kern  :warn  : [    5.902004]  kernel_init+0xa/0x11a
kern  :warn  : [    5.902168]  ret_from_fork+0x22/0x30
kern  :warn  : [    5.902338] ---[ end trace cba6bbf77ba0c364 ]---


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
lkp


View attachment "config-5.9.0-rc5-00023-g9c28a17954f000" of type "text/plain" (170290 bytes)

View attachment "job-script" of type "text/plain" (5019 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (65184 bytes)

View attachment "suspend-stress" of type "text/plain" (6146 bytes)

View attachment "job.yaml" of type "text/plain" (4012 bytes)