| TITLE: INFO: rcu detected stall in sys_futex |
| TYPE: HANG |
| |
| [ 246.173515] rcu: INFO: rcu_sched self-detected stall on CPU |
| [ 246.179319] rcu: 1-...!: (1 ticks this GP) idle=2e6/1/0x4000000000000002 softirq=21091/21091 fqs=0 |
| [ 246.188580] rcu: (t=110325 jiffies g=45621 q=219) |
| [ 246.193603] rcu: rcu_sched kthread starved for 110325 jiffies! g45621 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 |
| [ 246.204159] rcu: RCU grace-period kthread stack dump: |
| [ 246.209334] rcu_sched I23480 10 2 0x80000000 |
| [ 246.214997] Call Trace: |
| [ 246.217708] __schedule+0x87c/0x1ec0 |
| [ 246.247401] schedule+0xfb/0x450 |
| [ 246.277246] schedule_timeout+0x140/0x260 |
| [ 246.294402] rcu_gp_kthread+0x743/0x1d20 |
| [ 246.481639] kthread+0x35a/0x420 |
| [ 246.493143] ret_from_fork+0x3a/0x50 |
| [ 246.496878] NMI backtrace for cpu 1 |
| [ 246.500524] CPU: 1 PID: 4356 Comm: syz-fuzzer Not tainted 4.18.0-rc7-next-20180803+ #31 |
| [ 246.508667] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 246.518010] Call Trace: |
| [ 246.520578] <IRQ> |
| [ 246.522762] dump_stack+0x1c9/0x2b4 |
| [ 246.540779] nmi_cpu_backtrace.cold.3+0x48/0x88 |
| [ 246.550627] nmi_trigger_cpumask_backtrace+0x151/0x192 |
| [ 246.555897] arch_trigger_cpumask_backtrace+0x14/0x20 |
| [ 246.561086] rcu_dump_cpu_stacks+0x175/0x1c2 |
| [ 246.570531] print_cpu_stall.cold.78+0x2fb/0x59c |
| [ 246.596748] rcu_check_callbacks+0xd93/0x1660 |
| [ 246.719004] update_process_times+0x2d/0x70 |
| [ 246.723352] tick_sched_handle+0x9f/0x180 |
| [ 246.727495] tick_sched_timer+0x45/0x130 |
| [ 246.731565] __hrtimer_run_queues+0x3eb/0x10c0 |
| [ 246.776185] hrtimer_interrupt+0x2f3/0x750 |
| [ 246.780455] smp_apic_timer_interrupt+0x165/0x730 |
| [ 246.807990] apic_timer_interrupt+0xf/0x20 |
| [ 246.812208] </IRQ> |
| [ 246.814441] RIP: 0010:_raw_spin_unlock_irq+0x56/0x70 |
| [ 246.838429] RSP: 0018:ffff8801ad6ef090 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 |
| [ 246.846148] RAX: dffffc0000000000 RBX: ffff8801db12ca40 RCX: ffffffff81606487 |
| [ 246.853406] RDX: 1ffffffff0fe361f RSI: 0000000000000004 RDI: ffffffff87f1b0f8 |
| [ 246.860677] RBP: ffff8801ad6ef098 R08: ffffed003b625949 R09: ffffed003b625948 |
| [ 246.867934] R10: ffffed003b625948 R11: ffff8801db12ca43 R12: ffff8801ad502180 |
| [ 246.875212] R13: ffff8801d9f18380 R14: ffff88019c2e98c0 R15: dffffc0000000000 |
| [ 246.886921] finish_task_switch+0x1d3/0x870 |
| [ 246.965692] __schedule+0x884/0x1ec0 |
| [ 247.014854] schedule+0xfb/0x450 |
| [ 247.049482] futex_wait_queue_me+0x3f9/0x840 |
| [ 247.100651] futex_wait+0x45b/0xa20 |
| [ 247.125352] do_futex+0x336/0x27d0 |
| [ 247.229783] __x64_sys_futex+0x472/0x6a0 |
| [ 247.247689] do_syscall_64+0x1b9/0x820 |
| [ 247.280793] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 247.285980] RIP: 0033:0x45ddf3 |
| [ 247.308057] RSP: 002b:000000c420035e80 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca |
| [ 247.315756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045ddf3 |
| 2018/08/03 14:36:29 Manager.Poll call failed: connection is shut down |
| [ 247.323013] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001448298 |
| [ 247.330271] RBP: 000000c420035ec8 R08: 0000000000000000 R09: 0000000000000000 |
| [ 247.337529] R10: 000000c420035eb8 R11: 0000000000000246 R12: 0000000000430130 |
| [ 247.344791] R13: 00000000000000f1 R14: 0000000000000011 R15: 0000000000000000 |
