Bug 197975

Summary:	clocksource_watchdog crash 4.13.1
Product:	Timers	Reporter:	walter (wharms)
Component:	Other	Assignee:	john stultz (john.stultz)
Status:	NEW ---
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	4.13.1	Subsystem:
Regression:	No	Bisected commit-id:

Description walter 2017-11-24 11:48:38 UTC

I noticed a sudden spike in activity and found a list of problems.
I have no clue what happend or how to reproduce maybe someone can get
a useful information from it.

Nov 24 11:37:54  kernel: [323044.021929] CPU: 0 PID: 12590 Comm: mgetty Tainted: G        W    L  4.13.1-1.2-de
sktop #1
Nov 24 11:37:54  kernel: [323044.021930] Hardware name: Supermicro X8DTL/X8DTL, BIOS 2.0a       09/04/10  
Nov 24 11:37:54 kernel: [323044.021932] task: ffff9aef365e6380 task.stack: ffffb60e898d0000
Nov 24 11:37:54  kernel: [323044.021939] RIP: 0010:vprintk_default+0x9/0x50
Nov 24 11:37:54  kernel: [323044.021941] RSP: 0018:ffff9aef3fa03c90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
Nov 24 11:37:54  kernel: [323044.021943] RAX: 0000000000000000 RBX: ffffffffb9e24520 RCX: 0000000000000000
Nov 24 11:37:54  kernel: [323044.021944] RDX: ffffffffb9a2cc0e RSI: 0000000000000000 RDI: ffffffffb9a26a08
Nov 24 11:37:54  kernel: [323044.021946] RBP: ffff9aef3fa03c98 R08: ffffffffba132660 R09: ffff9aef3fa03ca8
Nov 24 11:37:54  kernel: [323044.021947] R10: 0000000000000005 R11: 0000000000000000 R12: 000000005bac3a23
Nov 24 11:37:54  kernel: [323044.021948] R13: 00024ae0a3817499 R14: 0000000000000000 R15: 00000000915bc5a8
Nov 24 11:37:54  kernel: [323044.021950] FS:  00007f0d098c3700(0000) GS:ffff9aef3fa00000(0000) knlGS:0000000000
000000
Nov 24 11:37:54  kernel: [323044.021952] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 24 11:37:54  kernel: [323044.021953] CR2: 00007f41ab3db010 CR3: 0000000137e09000 CR4: 00000000000006f0
Nov 24 11:37:54  kernel: [323044.021954] Call Trace:
Nov 24 11:37:54  kernel: [323044.021956]  <IRQ>
Nov 24 11:37:54  kernel: [323044.021959]  ? vprintk_func+0x22/0x70
Nov 24 11:37:54 kernel: [323044.021961]  printk+0x3c/0x3e
Nov 24 11:37:54 kernel: [323044.021965]  clocksource_watchdog+0x2b2/0x310
Nov 24 11:37:54 kernel: [323044.021968]  ? __clocksource_unstable+0x50/0x50
Nov 24 11:37:54  kernel: [323044.021972]  call_timer_fn+0x32/0x180
Nov 24 11:37:54  kernel: [323044.021974]  ? __clocksource_unstable+0x50/0x50
Nov 24 11:37:54  kernel: [323044.021976]  ? call_timer_fn+0x1/0x180
Nov 24 11:37:54  kernel: [323044.021978]  run_timer_softirq+0x48d/0x5a0
Nov 24 11:37:54  kernel: [323044.021980]  ? __clocksource_unstable+0x50/0x50
Nov 24 11:37:54  kernel: [323044.021983]  ? irq_exit+0x5c/0xb0
Nov 24 11:37:54  kernel: [323044.021986]  ? do_IRQ+0x5b/0xf0
Nov 24 11:37:54 kernel: [323044.021990]  ? common_interrupt+0x90/0x90
Nov 24 11:37:54  kernel: [323044.021993]  __do_softirq+0xbb/0x2c0
Nov 24 11:37:54 kernel: [323044.021997]  irq_exit+0x82/0xb0
Nov 24 11:37:54  kernel: [323044.022001]  smp_apic_timer_interrupt+0x3c/0x50
Nov 24 11:37:54  kernel: [323044.022003]  apic_timer_interrupt+0x90/0xa0
Nov 24 11:37:54  kernel: [323044.022004]  </IRQ>
Nov 24 11:37:54  kernel: [323044.022007] RIP: 0010:_raw_spin_unlock_irqrestore+0x9/0x20
Nov 24 11:37:54 kernel: [323044.022008] RSP: 0018:ffffb60e898d3c38 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff10
Nov 24 11:37:54  kernel: [323044.022010] RAX: 00000000000002c1 RBX: ffff9aef48a16c00 RCX: 00000000000002c1
Nov 24 11:37:54  kernel: [323044.022012] RDX: 000000000000b89a RSI: 0000000000000296 RDI: ffffffffc02a2408
Nov 24 11:37:54  kernel: [323044.022013] RBP: ffffb60e898d3c38 R08: 0000000000000000 R09: 0000000000303d33
Nov 24 11:37:54  kernel: [323044.022014] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffffc02a2408
Nov 24 11:37:54 kernel: [323044.022015] R13: ffffffffc02a21c0 R14: ffffffffc02a22c0 R15: ffff9aef38ec5068
Nov 24 11:37:54  kernel: [323044.022022]  mxser_flush_buffer+0x6d/0x90 [mxser]
Nov 24 11:37:54  kernel: [323044.022025]  mxser_close+0xe4/0x150 [mxser]
Nov 24 11:37:54  kernel: [323044.022030]  tty_release+0xbd/0x4c0
Nov 24 11:37:54 kernel: [323044.022035]  ? mntput_no_expire+0x32/0x190
Nov 24 11:37:54 kernel: [323044.022040]  __fput+0xb2/0x200
Nov 24 11:37:54  kernel: [323044.022043]  ____fput+0x9/0x10
Nov 24 11:37:54  kernel: [323044.022046]  task_work_run+0x84/0xa0
Nov 24 11:37:54  kernel: [323044.022050]  ? switch_task_namespaces+0x46/0x80
Nov 24 11:37:54  kernel: [323044.022054]  do_exit+0x15b/0x490
Nov 24 11:37:54  kernel: [323044.022057]  ? putname+0x5a/0x60
Nov 24 11:37:54  kernel: [323044.022059]  ? do_unlinkat+0xad/0x2c0
Nov 24 11:37:54  kernel: [323044.022062]  do_group_exit+0x4a/0xb0
Nov 24 11:37:54  kernel: [323044.022065]  SyS_exit_group+0x12/0x20
Nov 24 11:37:54 kernel: [323044.022067]  entry_SYSCALL_64_fastpath+0x13/0x94
Nov 24 11:37:54  kernel: [323044.022069] RIP: 0033:0x7f0d093f8d38
Nov 24 11:37:54  kernel: [323044.022070] RSP: 002b:00007ffd1f7728a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
Nov 24 11:37:54  kernel: [323044.022072] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0d093f8d38
Nov 24 11:37:54 omnsz10 kernel: [323044.022073] RDX: 000000000000000a RSI: 000000000000003c RDI: 000000000000000a
Nov 24 11:37:54  kernel: [323044.022074] RBP: 00007ffd1f772030 R08: 00000000000000e7 R09: ffffffffffffffa8
Nov 24 11:37:54  kernel: [323044.022075] R10: 00007f0d098c3700 R11: 0000000000000246 R12: 000000000040f6e8
Nov 24 11:37:54  kernel: [323044.022077] R13: 0000000000000002 R14: 000000000061b4a0 R15: 00007ffd1f7730c0
Nov 24 11:37:54  kernel: [323044.022079] Code: 41 00 e8 cb 46 6b 00 e8 f6 4e 06 00 e8 e1 43 06 00 41 83 ed 01 7
5 e6 e9 d8 fd ff ff 66 0f 1f 44 00 00 49 89 f1 8b 35 67 3c 08 01 <55> 49 89 f8 48 89 e5 85 f6 75 12 31 c9 31 d2 be ff 
ff ff ff 31