BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 124s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 124s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 123s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=7/256
    pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, cache_reap
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=7/256
    pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap
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=2/256
    pending: do_cache_clean, check_lifetime
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue writeback: flags=0x4e
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=3/256
    pending: wb_workfn, wb_workfn, wb_workfn
workqueue kblockd: flags=0x18
  pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256
    pending: blk_mq_timeout_work
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...!: (124998 ticks this GP) idle=eea/1/4611686018427387906 softirq=37212/37212 fqs=17 
	
	1-...!: (124998 ticks this GP) idle=eea/1/4611686018427387906 softirq=37212/37212 fqs=17 
	
 (t=125002 jiffies g=20611 c=20610 q=106)
(detected by 0, t=125002 jiffies, g=20611, c=20610, q=106)
rcu_sched kthread starved for 124931 jiffies! g20611 c20610 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: 4588 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vsnprintf+0x16e/0x1b40 lib/vsprintf.c:2244
RSP: 0018:ffff8801daf06c60 EFLAGS: 00000006
RAX: ffff8801a50a40c0 RBX: ffffffff8a6d25e1 RCX: ffffffff876c4f74
RDX: 0000000000010000 RSI: ffffffff876c4f7e RDI: 0000000000000001
RBP: ffff8801daf06d30 R08: ffff8801a50a40c0 R09: fffffbfff14da4bc
R10: fffffbfff14da4bc R11: ffffffff8a6d25e0 R12: ffffffff87cb5b21
R13: 0000000000000025 R14: ffffffff87cb5b21 R15: ffff8801daf06d08
FS:  000000000120e940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bc23000 CR3: 00000001a5001000 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:ffff8801a50af8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10034a15f20 RCX: 0000000000000000
RDX: 1ffffffff11a312d RSI: ffff8801a50a48f8 RDI: 0000000000000286
RBP: ffff8801a50af9c8 R08: 00000000000040b4 R09: 0000000000000004
R10: ffff8801a50a4998 R11: ffff8801a50a40c0 R12: ffff8801a50a40c0
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:00007ffeda857688 EFLAGS: 00000206 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004550f7
RDX: 0000000000000000 RSI: 00007ffeda859430 RDI: 00007ffeda859430
RBP: 00007ffeda859430 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000206 R12: 000000000120f940
R13: 0000000000000000 R14: 0000000000000206 R15: 000000000001dbcf
Code: 58 ff ff ff 48 c1 e8 03 48 01 c8 48 89 85 60 ff ff ff e8 b6 e0 0c fa 31 ff 44 89 ee e8 7c e1 0c fa 45 84 ed 74 6d e8 a2 e0 0c fa <48> 8b b5 58 ff ff ff 4c 89 e7 e8 d3 5f ff ff 48 98 48 89 85 50 
rcu_sched kthread starved for 124931 jiffies! g20611 c20610 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
  running task    23816     9      2 0x80000000
RCU grace-period kthread stack dump:
rcu_sched       R
Call Trace:
  running task    23816     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: 4588 Comm: syz-executor0 Not tainted 4.17.0-rc1+ #10
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:ffff8801a50af8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff10034a15f20 RCX: 0000000000000000
RDX: 1ffffffff11a312d RSI: ffff8801a50a48f8 RDI: 0000000000000286
RBP: ffff8801a50af9c8 R08: 00000000000040b4 R09: 0000000000000004
R10: ffff8801a50a4998 R11: ffff8801a50a40c0 R12: ffff8801a50a40c0
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:00007ffeda857688 EFLAGS: 00000206 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004550f7
RDX: 0000000000000000 RSI: 00007ffeda859430 RDI: 00007ffeda859430
RBP: 00007ffeda859430 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000206 R12: 000000000120f940
R13: 0000000000000000 R14: 0000000000000206 R15: 000000000001dbcf
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.340 msecs