On 8/27/20 2:07 PM, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 16fb162e7868b8f3c1fc09ef0d683c9554cb6404 ("[RFC] perf/core: Fixes
> hung issue on perf stat command during cpu hotplug")
> url:
> https://github.com/0day-ci/linux/commits/Kajol-Jain/perf-core-Fixes-hung-issue-on-perf-stat-command-during-cpu-hotplug/20200826-173643
> base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git
> 2cb5383b30d47c446ec7d884cd80f93ffcc31817
>
Hi Rong Chen,
Thanks for checking. Actually this is old patch, I recently send new
updated patch.
Please let me know if in this patch also you are seeing same issue.
Link to the patch: https://lkml.org/lkml/2020/8/27/101
Thanks,
Kajol Jain
> in testcase: trinity
> with following parameters:
>
> runtime: 300s
>
> test-description: Trinity is a linux system call fuzz tester.
> test-url: http://codemonkey.org.uk/projects/trinity/
>
>
> on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
>
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>
>
> +-------------------------------------------------+------------+------------+
> | | 2cb5383b30 | 16fb162e78 |
> +-------------------------------------------------+------------+------------+
> | boot_successes | 4 | 0 |
> | boot_failures | 0 | 8 |
> | WARNING:at_kernel/events/core.c:#list_add_event | 0 | 8 |
> | EIP:list_add_event | 0 | 8 |
> | kernel_BUG_at_lib/list_debug.c | 0 | 8 |
> | invalid_opcode:#[##] | 0 | 8 |
> | EIP:__list_add_valid | 0 | 8 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
> +-------------------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <rong.a.c...@intel.com>
>
>
> [ 97.084211] WARNING: CPU: 0 PID: 593 at kernel/events/core.c:1807
> list_add_event+0x29e/0x4b0
> [ 97.086779] Modules linked in:
> [ 97.087756] CPU: 0 PID: 593 Comm: trinity-main Not tainted
> 5.9.0-rc1-00012-g16fb162e7868b #1
> [ 97.089783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> 1.12.0-1 04/01/2014
> [ 97.091980] EIP: list_add_event+0x29e/0x4b0
> [ 97.093322] Code: ef c2 c4 01 83 15 44 ef c2 c4 00 8b 43 60 a8 01 0f 84 9a
> fd ff ff 8d b6 00 00 00 00 83 05 48 ef c2 c4 01 83 15 4c ef c2 c4 00 <0f> 0b
> 83 05 50 ef c2 c4 01 83 15 54 ef c2 c4 00 e9 71 fd ff ff 8d
> [ 97.097789] EAX: 00000007 EBX: eee48000 ECX: 00000001 EDX: ee125280
> [ 97.099297] ESI: eeebe200 EDI: 00000001 EBP: eee67dfc ESP: eee67dec
> [ 97.101008] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010046
> [ 97.106936] CR0: 80050033 CR2: 08dfc000 CR3: 2e0bb000 CR4: 00040690
> [ 97.108599] Call Trace:
> [ 97.109457] __perf_install_in_context+0x286/0x3e0
> [ 97.110759] remote_function+0x79/0x90
> [ 97.111897] generic_exec_single+0xc3/0x190
> [ 97.113101] smp_call_function_single+0x1a3/0x2d0
> [ 97.114364] ? bpf_fd_reuseport_array_update_elem+0x300/0x300
> [ 97.115866] task_function_call+0x87/0xc0
> [ 97.117025] ? __perf_event_enable+0x740/0x740
> [ 97.118248] perf_install_in_context+0x110/0x450
> [ 97.119540] __do_sys_perf_event_open+0x13cb/0x1ed0
> [ 97.120833] __ia32_sys_perf_event_open+0x24/0x40
> [ 97.122097] __do_fast_syscall_32+0x99/0x110
> [ 97.123213] do_fast_syscall_32+0x37/0x130
> [ 97.124409] do_SYSENTER_32+0x23/0x40
> [ 97.125470] entry_SYSENTER_32+0xb0/0x10d
> [ 97.126592] EIP: 0xb7f11549
> [ 97.127449] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03
> 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a
> 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
> [ 97.131832] EAX: ffffffda EBX: 08e38318 ECX: 00000000 EDX: ffffffff
> [ 97.137556] ESI: ffffffff EDI: 00000002 EBP: 6d656d83 ESP: bfa804ec
> [ 97.139119] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000286
> [ 97.140732] ---[ end trace 57d55e687e8b0e41 ]---
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.9.0-rc1-00012-g16fb162e7868b .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
>
>
>
> Thanks,
> Rong Chen
>
