INFO: task kworker/0:3:103 blocked for more than 143 seconds. Not tainted 5.3.0-rc4+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D23496 103 2 0x80004000 Workqueue: pm hcd_resume_work Call Trace: schedule+0x9a/0x250 kernel/sched/core.c:3944 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4003 __mutex_lock_common kernel/locking/mutex.c:1007 [inline] __mutex_lock+0x881/0x1360 kernel/locking/mutex.c:1077 device_lock include/linux/device.h:1223 [inline] usb_remote_wakeup+0x1f/0xb0 drivers/usb/core/hub.c:3600 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Showing all locks held in the system: 5 locks held by kworker/1:1/22: 1 lock held by khungtaskd/23: #0: 00000000f62a968d (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5254 3 locks held by kworker/0:2/102: #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: 0000000037711dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: 0000000088904568 (&dev->mutex){....}, at: device_lock include/linux/device.h:1223 [inline] #2: 0000000088904568 (&dev->mutex){....}, at: hub_event+0x17c/0x3640 drivers/usb/core/hub.c:5387 3 locks held by kworker/0:3/103: #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: 00000000d3623d52 ((work_completion)(&hcd->wakeup_work)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: 00000000c23cb669 (&dev->mutex){....}, at: device_lock include/linux/device.h:1223 [inline] #2: 00000000c23cb669 (&dev->mutex){....}, at: usb_remote_wakeup+0x1f/0xb0 drivers/usb/core/hub.c:3600 1 lock held by rsyslogd/1600: #0: 00000000d9029ff2 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:801 2 locks held by getty/1690: #0: 00000000138b526c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000037657155 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1691: #0: 0000000066bf1542 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000007cb827db (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1692: #0: 00000000fe5bc93c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000507a97a2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1693: #0: 000000003080820a (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000044dce960 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1694: #0: 000000002db5970f (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000008414089c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1695: #0: 00000000d764421f (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000d94269d2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 2 locks held by getty/1696: #0: 000000006adc76af (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000b25663de (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 drivers/tty/n_tty.c:2156 3 locks held by kworker/1:4/2721: 3 locks held by kworker/0:4/2766: #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 00000000847daee0 ((wq_completion)pm){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: 00000000db3cb063 ((work_completion)(&hcd->wakeup_work)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: 000000002c588383 (&dev->mutex){....}, at: device_lock include/linux/device.h:1223 [inline] #2: 000000002c588383 (&dev->mutex){....}, at: usb_remote_wakeup+0x1f/0xb0 drivers/usb/core/hub.c:3600 5 locks held by kworker/0:6/2874: #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000007021bb99 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 kernel/workqueue.c:2240 #1: 000000000139cca1 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 kernel/workqueue.c:2244 #2: 000000005e865ba0 (&dev->mutex){....}, at: device_lock include/linux/device.h:1223 [inline] #2: 000000005e865ba0 (&dev->mutex){....}, at: hub_event+0x17c/0x3640 drivers/usb/core/hub.c:5387 #3: 000000001a796fbe (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2996 [inline] #3: 000000001a796fbe (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5029 [inline] #3: 000000001a796fbe (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] #3: 000000001a796fbe (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5359 [inline] #3: 000000001a796fbe (&port_dev->status_lock){+.+.}, at: hub_event+0x196a/0x3640 drivers/usb/core/hub.c:5441 #4: 0000000083e29d1b (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b6/0x2d30 drivers/usb/core/hub.c:4538 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.3.0-rc4+ #26 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+0xca/0x13e lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x55/0x96 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x9a4/0xe50 kernel/hung_task.c:289 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1738 Comm: syz-executor.0 Not tainted 5.3.0-rc4+ #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:do_wait+0x18d/0x970 kernel/exit.c:1546 Code: 00 48 bd 00 00 00 00 00 fc ff df 48 8b 74 24 28 48 8b bb c8 06 00 00 48 83 c7 20 e8 8d 39 0e 00 49 8d 44 24 50 48 89 44 24 10 <65> 48 8b 04 25 00 ef 01 00 48 89 44 24 18 48 c1 e8 03 48 01 e8 48 RSP: 0018:ffff8881ba2cfc28 EFLAGS: 00000286 RAX: ffff8881ba2cfd48 RBX: ffff8881c732c800 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881c732d044 RBP: dffffc0000000000 R08: ffff8881c732c800 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881ba2cfcf8 R13: 0000000000000000 R14: 00007ffdee74ca90 R15: 0000000000000004 FS: 0000555556864940(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbfdd871000 CR3: 00000001ba7b2000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernel_wait4+0x14c/0x260 kernel/exit.c:1671 __do_sys_wait4+0x147/0x160 kernel/exit.c:1683 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4137ba Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 de 2a 66 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7 RSP: 002b:00007ffdee74ca58 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000055a62 RCX: 00000000004137ba RDX: 0000000040000001 RSI: 00007ffdee74ca90 RDI: ffffffffffffffff RBP: 000000000000029f R08: 0000000000000001 R09: 0000555556864940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdee74ca90 R14: 0000000000055a62 R15: 00007ffdee74caa0