INFO: task kworker/u4:4:1852 blocked for more than 140 seconds. Not tainted 4.14.144+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D27008 1852 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 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 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xfd/0x310 fs/notify/mark.c:757 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 INFO: task kworker/u4:6:1869 blocked for more than 140 seconds. Not tainted 4.14.144+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:6 D26560 1869 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 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 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 process_one_work+0x7f1/0x1580 kernel/workqueue.c:2134 worker_thread+0xdd/0xdf0 kernel/workqueue.c:2271 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 INFO: task syz-executor.2:8916 blocked for more than 140 seconds. Not tainted 4.14.144+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28624 8916 1841 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 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 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 debugfs_remove fs/debugfs/inode.c:669 [inline] debugfs_remove+0xc7/0x110 fs/debugfs/inode.c:654 binder_release+0x59/0x80 drivers/android/binder.c:5301 __fput+0x25e/0x710 fs/file_table.c:210 task_work_run+0x125/0x1a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:164 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 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4135d1 RSP: 002b:00007ffcd0ea08d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004135d1 RDX: 0000001b2e820000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000076dee754 R09: 0000000076dee758 R10: 00007ffcd0ea09b0 R11: 0000000000000293 R12: 000000000075c9a0 R13: 000000000075c9a0 R14: 0000000000760f68 R15: 000000000075bf2c INFO: task syz-executor.0:8918 blocked for more than 140 seconds. Not tainted 4.14.144+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28624 8918 1842 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721 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 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 debugfs_remove fs/debugfs/inode.c:669 [inline] debugfs_remove+0xc7/0x110 fs/debugfs/inode.c:654 binder_release+0x59/0x80 drivers/android/binder.c:5301 __fput+0x25e/0x710 fs/file_table.c:210 task_work_run+0x125/0x1a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:164 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 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4135d1 RSP: 002b:00007ffe63aa2500 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004135d1 RDX: 0000001b2e720000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000df7a599e R09: 00000000df7a59a2 R10: 00007ffe63aa25e0 R11: 0000000000000293 R12: 000000000075c9a0 R13: 000000000075c9a0 R14: 0000000000761138 R15: 000000000075bfd4 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<00000000c3c5c32d>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1635: #0: (&f->f_pos_lock){+.+.}, at: [<00000000ceaf716b>] __fdget_pos+0xb5/0xd0 fs/file.c:769 2 locks held by getty/1765: #0: (&tty->ldisc_sem){++++}, at: [<00000000cf91083b>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000000daaf5da>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:4/1852: #0: ("events_unbound"){+.+.}, at: [<000000003ee2f1cd>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: ((reaper_work).work){+.+.}, at: [<000000006c9be1c1>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 2 locks held by kworker/u4:6/1869: #0: ("events_unbound"){+.+.}, at: [<000000003ee2f1cd>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105 #1: (connector_reaper_work){+.+.}, at: [<000000006c9be1c1>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.144+ #0 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2371 Comm: kworker/1:2 Not tainted 4.14.144+ #0 Workqueue: events rtc_timer_do_work task: 0000000069639b55 task.stack: 0000000090a7a740 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline] RIP: 0010:trace_hardirqs_on_caller+0x10e/0x540 kernel/locking/lockdep.c:2909 RSP: 0018:ffff88819ca27b40 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffffffffbb1f6720 RCX: 1ffffffff73c2a20 RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffff88819c9565f8 RBP: ffffffffb909c3e4 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000090 R13: ffff8881d5cdc148 R14: ffff8881d5cdc210 R15: ffffffffb88c8c80 FS: 0000000000000000(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8dce710000 CR3: 00000001aa626004 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: Code: 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e9 02 00 00 44 8b 0d 7c 95 7f 03 45 85 c9 0f 85 c5 00 00 00 9c <58> 0f 1f 44 00 00 f6 c4 02 0f 85 3e 03 00 00 48 b8 00 00 00 00