INFO: task kworker/u4:3:33 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc7-next-20190222 #41
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:3    D25472    33      2 0x80000000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
 __synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
 synchronize_srcu_expedited kernel/rcu/srcutree.c:950 [inline]
 synchronize_srcu+0x239/0x3e8 kernel/rcu/srcutree.c:1001
 fsnotify_connector_destroy_workfn+0x4e/0xa0 fs/notify/mark.c:177
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2267
 worker_thread+0x98/0xe40 kernel/workqueue.c:2413
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
INFO: task kworker/u4:5:7946 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc7-next-20190222 #41
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:5    D25184  7946      2 0x80000000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
 __synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
 synchronize_srcu+0x2dc/0x3e8 kernel/rcu/srcutree.c:1003
 fsnotify_mark_destroy_workfn+0x110/0x3b0 fs/notify/mark.c:827
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2267
 worker_thread+0x98/0xe40 kernel/workqueue.c:2413
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
INFO: task syz-executor.2:22650 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc7-next-20190222 #41
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D28240 22650   7709 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
 __synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
 synchronize_srcu_expedited kernel/rcu/srcutree.c:950 [inline]
 synchronize_srcu+0x239/0x3e8 kernel/rcu/srcutree.c:1001
 mmu_notifier_unregister+0x2cf/0x440 mm/mmu_notifier.c:372
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:745 [inline]
 kvm_put_kvm+0x553/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:770
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2500
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411d31
Code: be b3 34 01 00 00 31 c0 bf bb 36 44 00 e8 17 f3 00 00 8b b3 30 01 00 00 31 c0 bf d0 36 44 00 e8 05 f3 00 00 8b b3 08 01 00 00 <31> c0 bf e4 36 44 00 e8 f3 f2 00 00 8b 83 e0 00 00 00 48 89 ee bf
RSP: 002b:00007ffc8278f430 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 000000000000000b RCX: 0000000000411d31
RDX: 0000000000000000 RSI: 0000000000741b10 RDI: 000000000000000a
RBP: 0000000000000000 R08: 000000000007e63f R09: 000000000007e63f
R10: 00007ffc8278f360 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000001b7 R15: 0000000000000002
INFO: task syz-executor.2:22694 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc7-next-20190222 #41
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D28600 22694   7709 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
 __synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
 synchronize_srcu+0x2dc/0x3e8 kernel/rcu/srcutree.c:1003
 mmu_notifier_unregister+0x2cf/0x440 mm/mmu_notifier.c:372
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:745 [inline]
 kvm_put_kvm+0x553/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:770
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2500
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e29
Code: Bad RIP value.
RSP: 002b:00007effb5e5fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457e29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007effb5e606d4
R13: 00000000004c0d61 R14: 00000000004d2bb8 R15: 00000000ffffffff
INFO: task syz-executor.1:22660 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc7-next-20190222 #41
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28240 22660   7707 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2877 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3518
 schedule+0x92/0x180 kernel/sched/core.c:3562
 schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
 __flush_work+0x4ab/0x8a0 kernel/workqueue.c:3037
 flush_work kernel/workqueue.c:3058 [inline]
 flush_delayed_work+0xb7/0x180 kernel/workqueue.c:3182
 fsnotify_wait_marks_destroyed+0x15/0x17 fs/notify/mark.c:838
 fsnotify_destroy_group+0x14d/0x330 fs/notify/group.c:88
 inotify_release+0x37/0x50 fs/notify/inotify/inotify_user.c:281
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411d31
Code: be b3 34 01 00 00 31 c0 bf bb 36 44 00 e8 17 f3 00 00 8b b3 30 01 00 00 31 c0 bf d0 36 44 00 e8 05 f3 00 00 8b b3 08 01 00 00 <31> c0 bf e4 36 44 00 e8 f3 f2 00 00 8b 83 e0 00 00 00 48 89 ee bf
RSP: 002b:00007ffca42b9740 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411d31
RDX: 0000000000000000 RSI: 00000000007415d8 RDI: 0000000000000004
RBP: 0000000000000000 R08: 000000000007e6bb R09: 000000000007e6bb
R10: 00007ffca42b9670 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000027d R15: 0000000000000001

Showing all locks held in the system:
3 locks held by kworker/1:0/17:
2 locks held by kworker/u4:3/33:
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: __write_once_size include/linux/compiler.h:224 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2238
 #1: 00000000099598bf (connector_reaper_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2242
1 lock held by khungtaskd/1044:
 #0: 0000000010ae7174 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4382
1 lock held by khugepaged/1051:
 #0: 0000000075829e5c (pcpu_drain_mutex){+.+.}, at: drain_all_pages+0x4d/0x590 mm/page_alloc.c:2892
1 lock held by rsyslogd/7577:
 #0: 00000000a8677577 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/7667:
 #0: 000000003e689824 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b871439c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7668:
 #0: 00000000282ce549 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000af891540 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7669:
 #0: 000000009af5bb0b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b5daacea (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7670:
 #0: 000000000a23fad4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000004ae6b193 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7671:
 #0: 00000000da46a338 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 0000000048a89bbc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7672:
 #0: 00000000a07ae778 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000d11cd060 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7673:
 #0: 000000005fbce72a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000001f2ec96e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by kworker/u4:5/7946:
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: __write_once_size include/linux/compiler.h:224 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 0000000068022fcb ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2238
 #1: 0000000075da6097 ((reaper_work).work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2242
1 lock held by syz-executor.2/8549:
 #0: 0000000089e9bcbd (rcu_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:285 [inline]
 #0: 0000000089e9bcbd (rcu_state.exp_mutex){+.+.}, at: synchronize_rcu_expedited+0x4ab/0x5b0 kernel/rcu/tree_exp.h:758
1 lock held by syz-executor.2/8567:
 #0: 0000000089e9bcbd (rcu_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:317 [inline]
 #0: 0000000089e9bcbd (rcu_state.exp_mutex){+.+.}, at: synchronize_rcu_expedited+0x26f/0x5b0 kernel/rcu/tree_exp.h:758

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1044 Comm: khungtaskd Not tainted 5.0.0-rc7-next-20190222 #41
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0x9b2/0xeb0 kernel/hung_task.c:288
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1: