BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 122s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 122s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=8/256
    pending: defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap, defense_work_handler, defense_work_handler, defense_work_handler, check_corruption
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512
    in-flight: 4590:call_usermodehelper_exec_work
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: gc_worker
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
    pending: do_cache_clean, neigh_periodic_work, check_lifetime
workqueue mm_percpu_wq: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue ib_addr: flags=0xa0002
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1
    pending: process_req
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: work_fn
workqueue ipv6_addrconf: flags=0x40008
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1
    pending: addrconf_verify_work
pool 4: cpus=0-1 flags=0x4 nice=0 hung=103s workers=8 idle: 117 218 4573 63 5007 6 22
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...!: (124997 ticks this GP) idle=4aa/1/4611686018427387906 softirq=38806/38806 fqs=5 
	
	1-...!: (124997 ticks this GP) idle=4aa/1/4611686018427387906 softirq=38806/38806 fqs=5 
	
 (t=125002 jiffies g=20326 c=20325 q=392)
(detected by 0, t=125002 jiffies, g=20326, c=20325, q=392)
rcu_sched kthread starved for 124982 jiffies! g20326 c20325 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
Sending NMI from CPU 0 to CPUs 1:
RCU grace-period kthread stack dump:
rcu_sched       R
NMI backtrace for cpu 1
CPU: 1 PID: 4544 Comm: syz-executor4 Not tainted 4.17.0-rc1+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:146
RSP: 0018:ffff8801daf06c58 EFLAGS: 00000097
RAX: ffffffff876c4302 RBX: ffffffff8a6d25e0 RCX: ffffffff876c3fc8
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000001
RBP: ffff8801daf06d30 R08: ffff88019f10c640 R09: fffffbfff11b09bc
R10: fffffbfff11b09bc R11: ffffffff88d84de3 R12: ffffffff87cb5aa0
R13: 0000000000000000 R14: ffffffff87cb5aa1 R15: ffff8801daf06d08
FS:  0000000001e11940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8ff65cac CR3: 000000019f0fe000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 sprintf+0xa7/0xd0 lib/vsprintf.c:2494
 print_time kernel/printk/printk.c:1223 [inline]
 print_prefix+0x26a/0x3f0 kernel/printk/printk.c:1246
 msg_print_text+0xca/0x1c0 kernel/printk/printk.c:1273
 console_unlock+0x4f5/0x1100 kernel/printk/printk.c:2369
 vprintk_emit+0x6ad/0xdd0 kernel/printk/printk.c:1907
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379
 printk+0x9e/0xba kernel/printk/printk.c:1980
 sched_show_task.cold.86+0x58/0x301 kernel/sched/core.c:5308
 rcu_check_gp_kthread_starvation+0x34f/0x3a4 kernel/rcu/tree.c:1354
 print_cpu_stall kernel/rcu/tree.c:1523 [inline]
 check_cpu_stall.isra.61.cold.80+0x364/0x59a kernel/rcu/tree.c:1593
 __rcu_pending kernel/rcu/tree.c:3356 [inline]
 rcu_pending kernel/rcu/tree.c:3401 [inline]
 rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
 update_process_times+0x2d/0x70 kernel/time/timer.c:1636
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:173
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1283
 __run_hrtimer kernel/time/hrtimer.c:1386 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1448
 hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1506
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff88019f1178d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10033e22f20 RCX: 0000000000000000
RDX: 1ffffffff11a312d RSI: ffff88019f10ce78 RDI: 0000000000000286
RBP: ffff88019f1179c8 R08: 0000000000005536 R09: 0000000000000004
R10: ffff88019f10cf18 R11: ffff88019f10c640 R12: ffff88019f10c640
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
 _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354
 d_walk+0x3ad/0xc80 fs/dcache.c:1274
 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486
 vfs_rmdir+0x202/0x470 fs/namei.c:3850
 do_rmdir+0x523/0x610 fs/namei.c:3911
 __do_sys_rmdir fs/namei.c:3929 [inline]
 __se_sys_rmdir fs/namei.c:3927 [inline]
 __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4550f7
RSP: 002b:00007fff8ff663b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004550f7
RDX: 0000000000000000 RSI: 00007fff8ff68160 RDI: 00007fff8ff68160
RBP: 00007fff8ff68160 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000206 R12: 0000000001e12940
R13: 0000000000000000 R14: 00000000000001de R15: 000000000001e44c
Code: 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 <55> 65 48 8b 04 25 c0 ed 01 00 65 8b 15 1f bd 88 7e 48 89 e5 81 
rcu_sched kthread starved for 124982 jiffies! g20326 c20325 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
  running task    23768     9      2 0x80000000
RCU grace-period kthread stack dump:
rcu_sched       R
Call Trace:
  running task    23768     9      2 0x80000000
 context_switch kernel/sched/core.c:2848 [inline]
 __schedule+0x801/0x1e30 kernel/sched/core.c:3490
Call Trace:
 context_switch kernel/sched/core.c:2848 [inline]
 __schedule+0x801/0x1e30 kernel/sched/core.c:3490
 schedule+0xef/0x430 kernel/sched/core.c:3549
 schedule+0xef/0x430 kernel/sched/core.c:3549
 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801
 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801
 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231
 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231
 kthread+0x345/0x410 kernel/kthread.c:238
 kthread+0x345/0x410 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
NMI backtrace for cpu 1
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
CPU: 1 PID: 4544 Comm: syz-executor4 Not tainted 4.17.0-rc1+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
 rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
 print_cpu_stall kernel/rcu/tree.c:1525 [inline]
 check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
 __rcu_pending kernel/rcu/tree.c:3356 [inline]
 rcu_pending kernel/rcu/tree.c:3401 [inline]
 rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
 update_process_times+0x2d/0x70 kernel/time/timer.c:1636
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:173
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1283
 __run_hrtimer kernel/time/hrtimer.c:1386 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1448
 hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1506
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff88019f1178d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10033e22f20 RCX: 0000000000000000
RDX: 1ffffffff11a312d RSI: ffff88019f10ce78 RDI: 0000000000000286
RBP: ffff88019f1179c8 R08: 0000000000005536 R09: 0000000000000004
R10: ffff88019f10cf18 R11: ffff88019f10c640 R12: ffff88019f10c640
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
 _raw_spin_lock_nested+0x28/0x40 kernel/locking/spinlock.c:354
 d_walk+0x3ad/0xc80 fs/dcache.c:1274
 shrink_dcache_parent+0x179/0x230 fs/dcache.c:1486
 vfs_rmdir+0x202/0x470 fs/namei.c:3850
 do_rmdir+0x523/0x610 fs/namei.c:3911
 __do_sys_rmdir fs/namei.c:3929 [inline]
 __se_sys_rmdir fs/namei.c:3927 [inline]
 __x64_sys_rmdir+0x36/0x40 fs/namei.c:3927
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4550f7
RSP: 002b:00007fff8ff663b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004550f7
RDX: 0000000000000000 RSI: 00007fff8ff68160 RDI: 00007fff8ff68160
RBP: 00007fff8ff68160 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000206 R12: 0000000001e12940
R13: 0000000000000000 R14: 00000000000001de R15: 000000000001e44c
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.388 msecs