BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 253s! INFO: task kworker/u4:1:64 blocked for more than 140 seconds. Showing busy workqueues and worker pools: Not tainted 4.14.143+ #0 workqueue events: flags=0x0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:1 D pwq 0: 25936 64 2 0x80000000 cpus=0 node=0 flags=0x0 nice=0 active=256/256 in-flight: 15919:rtc_timer_do_work pending: Workqueue: events_unbound fsnotify_connector_destroy_workfn key_garbage_collector , vmstat_shepherd Call Trace: , free_obj_work , wait_rcu_exp_gp , binder_deferred_func, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty schedule+0x92/0x1c0 kernel/sched/core.c:3498 , release_one_tty schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 , release_one_tty , release_one_tty , release_one_tty fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 , release_one_tty process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty kthread+0x31f/0x430 kernel/kthread.c:232 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 , release_one_tty INFO: task kworker/u4:2:358 blocked for more than 140 seconds. , release_one_tty Not tainted 4.14.143+ #0 , release_one_tty "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. , release_one_tty kworker/u4:2 D , release_one_tty, release_one_tty, release_one_tty, release_one_tty 26272 358 2 0x80000000 , release_one_tty, release_one_tty, release_one_tty, release_one_tty Workqueue: events_unbound fsnotify_mark_destroy_workfn , release_one_tty, release_one_tty, release_one_tty, release_one_tty Call Trace: , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty schedule+0x92/0x1c0 kernel/sched/core.c:3498 , release_one_tty, release_one_tty, release_one_tty, release_one_tty schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 , release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, proc_cleanup_work , release_one_tty, release_one_tty, release_one_tty, release_one_tty __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty fsnotify_mark_destroy_workfn+0xfd/0x310 fs/notify/mark.c:757 , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 , release_one_tty, release_one_tty, release_one_tty, destroy_super_work , release_one_tty kthread+0x31f/0x430 kernel/kthread.c:232 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 , release_one_tty INFO: task syz-executor.5:7245 blocked for more than 140 seconds. , release_one_tty Not tainted 4.14.143+ #0 , release_one_tty "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. , release_one_tty syz-executor.5 D , release_one_tty, release_one_tty, release_one_tty, release_one_tty 28328 7245 1849 0x80000002 , release_one_tty Call Trace: , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty schedule+0x92/0x1c0 kernel/sched/core.c:3498 , release_one_tty schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 , release_one_tty, release_one_tty, release_one_tty, release_one_tty __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty delayed: release_one_tty , release_one_tty raw_close+0xe/0x30 net/ipv4/raw.c:699 , release_one_tty inet_release+0xe9/0x1c0 net/ipv4/af_inet.c:423 , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty __sock_release+0xd2/0x2c0 net/socket.c:602 , release_one_tty , release_one_tty sock_close+0x15/0x20 net/socket.c:1139 , release_one_tty __fput+0x25e/0x710 fs/file_table.c:210 , release_one_tty task_work_run+0x125/0x1a0 kernel/task_work.c:113 , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9cb/0x2a20 kernel/exit.c:875 , release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty do_group_exit+0x100/0x2e0 kernel/exit.c:978 , release_one_tty get_signal+0x39f/0x1cc0 kernel/signal.c:2422 , release_one_tty, release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty , release_one_tty, release_one_tty, release_one_tty, release_one_tty , release_one_tty , release_one_tty , release_one_tty exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 , release_one_tty prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 , release_one_tty, release_one_tty, release_one_tty, release_one_tty entry_SYSCALL_64_after_hwframe+0x42/0xb7 , release_one_tty, release_one_tty, release_one_tty, release_one_tty RIP: 0033:0x4598e9 , release_one_tty, release_one_tty RSP: 002b:00007f5d18c32cf8 EFLAGS: 00000246 , release_one_tty ORIG_RAX: 00000000000000ca , release_one_tty, release_one_tty, release_one_tty, release_one_tty RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 00000000004598e9 , release_one_tty, release_one_tty, release_one_tty, release_one_tty RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0 , release_one_tty RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 , release_one_tty, release_one_tty, release_one_tty, release_one_tty R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4 , release_one_tty, release_one_tty, release_one_tty, release_one_tty R13: 00007ffc6c71733f R14: 00007f5d18c339c0 R15: 000000000075bfd4 , release_one_tty INFO: task syz-executor.5:7293 blocked for more than 140 seconds. , release_one_tty, release_one_tty, release_one_tty ======================================================