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Message-ID: <20170815013036.GA626@yexl-desktop>
Date:   Tue, 15 Aug 2017 09:30:36 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        LKML <linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
        cgroups@...r.kernel.org, lkp@...org
Subject: [lkp-robot] [cgroup]  7423909233: BUG:unable_to_handle_kernel


FYI, we noticed the following commit:

commit: 74239092337c458c622385cc2f6a4d12bb52d24e ("cgroup: Implement cgroup2 basic CPU usage accounting")
https://git.kernel.org/cgit/linux/kernel/git/tj/cgroup.git review-cgroup2-cpu-basic-stat

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-x86_64 -enable-kvm -cpu SandyBridge -m 512M

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


+-------------------------------------------------------+------------+------------+
|                                                       | c0dee458e0 | 7423909233 |
+-------------------------------------------------------+------------+------------+
| boot_successes                                        | 4          | 2          |
| boot_failures                                         | 4          | 6          |
| BUG:kernel_hang_in_test_stage                         | 4          |            |
| BUG:unable_to_handle_kernel                           | 0          | 6          |
| Oops:#[##]                                            | 0          | 6          |
| Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0          | 6          |
+-------------------------------------------------------+------------+------------+



[    0.001380] BUG: unable to handle kernel NULL pointer dereference at 00000000000000e0
[    0.002000] IP: account_system_index_time+0x12a/0x1af
[    0.002000] PGD 0 
[    0.002000] P4D 0 
[    0.002000] 
[    0.002000] Oops: 0000 [#1] SMP
[    0.002000] Modules linked in:
[    0.002000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.13.0-rc1-00021-g7423909 #18
[    0.002000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    0.002000] task: ffffffffab628500 task.stack: ffffffffab600000
[    0.002000] RIP: 0010:account_system_index_time+0x12a/0x1af
[    0.002000] RSP: 0000:ffff96549f803c98 EFLAGS: 00010046
[    0.002000] RAX: 0000000000000000 RBX: ffffffffab628500 RCX: 00000000fff649d9
[    0.002000] RDX: ffffffffaa0cc24e RSI: 00000000ca811012 RDI: 0000000000000000
[    0.002000] RBP: ffff96549f803cb8 R08: 00000002a7e04703 R09: 0000000000000001
[    0.002000] R10: 0000000000000000 R11: 0000000000000068 R12: 00000000000f4240
[    0.002000] R13: 0000000000000003 R14: ffffffffab68b940 R15: 0000000000000000
[    0.002000] FS:  0000000000000000(0000) GS:ffff96549f800000(0000) knlGS:0000000000000000
[    0.002000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.002000] CR2: 00000000000000e0 CR3: 000000000e623000 CR4: 00000000000006b0
[    0.002000] Call Trace:
[    0.002000]  <IRQ>
[    0.002000]  account_system_time+0x56/0x58
[    0.002000]  account_process_tick+0x7a/0xdb
[    0.002000]  update_process_times+0x22/0x54
[    0.002000]  tick_periodic+0xa0/0xac
[    0.002000]  tick_handle_periodic+0x25/0x66
[    0.002000]  timer_interrupt+0x15/0x1c
[    0.002000]  __handle_irq_event_percpu+0xfd/0x309
[    0.002000]  handle_irq_event_percpu+0x20/0x4b
[    0.002000]  handle_irq_event+0x38/0x56
[    0.002000]  handle_level_irq+0x9c/0xcd
[    0.002000]  handle_irq+0xf0/0xfc
[    0.002000]  do_IRQ+0x80/0xfc
[    0.002000]  common_interrupt+0x93/0x93
[    0.002000] RIP: 0010:native_irq_enable+0x6/0x7
[    0.002000] RSP: 0000:ffff96549f803f38 EFLAGS: 00000202 ORIG_RAX: ffffffffffffffcf
[    0.002000] RAX: ffffffffab628500 RBX: 0000000000000002 RCX: 0000000000000000
[    0.002000] RDX: ffff96549f803f34 RSI: ffffffffab628d98 RDI: ffffffffab628500
[    0.002000] RBP: ffff96549f803fa0 R08: 00000002a7dc618a R09: 0000000000000001
[    0.002000] R10: 0000000000000001 R11: 0000000000000068 R12: ffffffffab628500
[    0.002000] R13: ffffffffab603d38 R14: ffff96549f432fd8 R15: 0000000000000001
[    0.002000]  ? __do_softirq+0x9e/0x43b
[    0.002000]  irq_exit+0x5d/0xad
[    0.002000]  do_IRQ+0xe4/0xfc
[    0.002000]  common_interrupt+0x93/0x93
[    0.002000] RIP: 0010:native_restore_fl+0x6/0x8
[    0.002000] RSP: 0000:ffffffffab603de0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffcf
[    0.002000] RAX: ffffffffab628500 RBX: 0000000000000246 RCX: ffffffffab603d58
[    0.002000] RDX: ffffffffaa08afce RSI: ffffffffab628d98 RDI: 0000000000000246
[    0.002000] RBP: ffffffffab603de0 R08: 00000002a7cee657 R09: ffffffffab2689f8
[    0.002000] R10: ffffffffab603c70 R11: 0000000000000002 R12: ffff96549f433080
[    0.002000] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[    0.002000]  </IRQ>
[    0.002000]  ? kvm_sched_clock_read+0x9/0x12
[    0.002000]  _raw_spin_unlock_irqrestore+0x52/0x5e
[    0.002000]  __setup_irq+0x437/0x596
[    0.002000]  setup_irq+0x54/0x6f
[    0.002000]  hpet_time_init+0x31/0x33
[    0.002000]  x86_late_time_init+0xf/0x16
[    0.002000]  start_kernel+0x35d/0x402
[    0.002000]  ? early_idt_handler_array+0x120/0x120
[    0.002000]  x86_64_start_reservations+0x24/0x26
[    0.002000]  x86_64_start_kernel+0x13b/0x14a
[    0.002000]  secondary_startup_64+0x9f/0x9f
[    0.002000] Code: 17 cf 03 00 85 c0 75 1f 48 c7 c2 56 bc 24 ab be cf 01 00 00 48 c7 c7 89 59 26 ab c6 05 30 d7 5a 01 01 e8 53 d3 01 00 49 8b 7e 40 <48> 83 bf e0 00 00 00 00 75 6e e8 8a c9 03 00 85 c0 74 31 80 3d 
[    0.002000] RIP: account_system_index_time+0x12a/0x1af RSP: ffff96549f803c98
[    0.002000] CR2: 00000000000000e0
[    0.002000] ---[ end trace be658dd14e22cef1 ]---


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.13.0-rc1-00021-g7423909" of type "text/plain" (117981 bytes)

View attachment "job-script" of type "text/plain" (3810 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (5804 bytes)

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