BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 123s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 123s!
BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 122s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=12/256
    pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, 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=11/256
    pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap, check_corruption
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256
    pending: gc_worker, neigh_periodic_work, do_cache_clean
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256
    pending: neigh_periodic_work, 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=7/256
    pending: wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn
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 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
    pending: addrconf_verify_work
INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=125007 jiffies, g=273703, c=273702, q=291)
All QSes seen, last rcu_sched kthread activity 125014 (4296021196-4295896182), jiffies_till_next_fqs=3, root ->qsmask 0x0
syz-executor1   R  running task    18064  4491   4485 0x00000008
Call Trace:
 <IRQ>
 sched_show_task.cold.87+0x27a/0x301 kernel/sched/core.c:5325
 print_other_cpu_stall.cold.79+0x92f/0x9d2 kernel/rcu/tree.c:1481
 check_cpu_stall.isra.61+0x706/0xf50 kernel/rcu/tree.c:1599
 __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:862
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_release+0x4d4/0xa10 kernel/locking/lockdep.c:3942
RSP: 0018:ffff8801a3e47880 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff100347c8f15 RCX: 1ffff100347c7905
RDX: 1ffffffff11a30ed RSI: 0000000000000005 RDI: 0000000000000282
RBP: ffff8801a3e479b0 R08: 1ffff100347c8f19 R09: ffff8801a3e47708
R10: 0000000000000003 R11: 0000000000000004 R12: ffff8801a3e3c000
R13: ffff88019f6b3958 R14: ffff8801a3e3c000 R15: ffff8801a3e478c8
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x1a/0x30 kernel/locking/spinlock.c:176
 spin_unlock include/linux/spinlock.h:350 [inline]
 d_walk+0x451/0xc80 fs/dcache.c:1298
 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
 SYSC_rmdir fs/namei.c:3929 [inline]
 SyS_rmdir+0x1a/0x20 fs/namei.c:3927
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4550f7
RSP: 002b:00007ffddb1310c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00000000004550f7
RDX: 0000000000000000 RSI: 00007ffddb132e70 RDI: 00007ffddb132e70
RBP: 00007ffddb132e70 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000202 R12: 0000000000b38940
R13: 0000000000000000 R14: 0000000000001de0 R15: 000000000012bf91
rcu_sched kthread starved for 125593 jiffies! g273703 c273702 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
RCU grace-period kthread stack dump:
rcu_sched       R  running task    22584     9      2 0x80000000
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_timeout+0x138/0x240 kernel/time/timer.c:1801
 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231
 kthread+0x345/0x410 kernel/kthread.c:238
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411