INFO: task kworker/1:7:2811 blocked for more than 143 seconds. Not tainted 5.2.0-rc1+ #10 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:7 D23896 2811 2 0x80004000 Workqueue: events request_firmware_work_func Call Trace: schedule+0x96/0x240 kernel/sched/core.c:3508 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:3567 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x7fb/0x12b0 kernel/locking/mutex.c:1072 device_lock include/linux/device.h:1207 [inline] p54u_load_firmware_cb.cold+0xfb/0x13d drivers/net/wireless/intersil/p54/p54usb.c:941 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:785 process_one_work+0x905/0x1570 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x30b/0x410 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Showing all locks held in the system: 11 locks held by kworker/1:0/17: 1 lock held by khungtaskd/23: #0: 000000003d1f1d51 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5146 1 lock held by rsyslogd/1610: 2 locks held by getty/1700: #0: 000000007634c964 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000002b6171b1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1701: #0: 00000000bd3e1946 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000007b7718b7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1702: #0: 00000000487caea2 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000002708df5d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1703: #0: 00000000394cf9f8 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000288a0bc3 (&ldata->atomic_read_lock ){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1704: #0: 00000000a8739bf1 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000e2029088 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1705: #0: 00000000cc783b9a (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000001de2a033 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 2 locks held by getty/1706: #0: 0000000042022256 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000044d2a72a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2156 6 locks held by kworker/0:3/2741: 6 locks held by kworker/1:4/2761: #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81a/0x1570 kernel/workqueue.c:2239 #1: 00000000b9e03930 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x84e/0x1570 kernel/workqueue.c:2243 #2: 000000001924d700 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 000000001924d700 (&dev->mutex){....}, at: hub_event+0x179/0x3590 drivers/usb/core/hub.c:5378 #3: 000000004ed53211 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 000000004ed53211 (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:820 #4: 00000000f5160fc0 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 00000000f5160fc0 (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:820 #5: 000000003bf9237e (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #5: 000000003bf9237e (&dev->mutex){....}, at: __device_attach+0x7b/0x360 drivers/base/dd.c:820 6 locks held by kworker/1:5/2780: 5 locks held by kworker/1:6/2807: #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81a/0x1570 kernel/workqueue.c:2239 #1: 0000000066ebb596 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x84e/0x1570 kernel/workqueue.c:2243 #2: 00000000b228fa1f (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000b228fa1f (&dev->mutex){....}, at: hub_event+0x179/0x3590 drivers/usb/core/hub.c:5378 #3: 00000000caaaf8bf (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2994 [inline] #3: 00000000caaaf8bf (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5020 [inline] #3: 00000000caaaf8bf (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] #3: 00000000caaaf8bf (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5350 [inline] #3: 00000000caaaf8bf (&port_dev->status_lock){+.+.}, at: hub_event+0x18e8/0x3590 drivers/usb/core/hub.c:5432 #4: 000000001c265dfd (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b6/0x2c00 drivers/usb/core/hub.c:4529 3 locks held by kworker/1:7/2811: #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000e59a24bf ((wq_completion)events){+.+.}, at: process_one_work+0x81a/0x1570 kernel/workqueue.c:2239 #1: 000000006858a46c ((work_completion)(&fw_work->work)){+.+.}, at: process_one_work+0x84e/0x1570 kernel/workqueue.c:2243 #2: 00000000e9c37f4b (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000e9c37f4b (&dev->mutex){....}, at: p54u_load_firmware_cb.cold+0xfb/0x13d drivers/net/wireless/intersil/p54/p54usb.c:941 3 locks held by kworker/1:3/13004: #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:221 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000074804929 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81a/0x1570 kernel/workqueue.c:2239 #1: 00000000cc271ac6 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x84e/0x1570 kernel/workqueue.c:2243 #2: 0000000025afe3d2 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 0000000025afe3d2 (&dev->mutex){....}, at: hub_event+0x179/0x3590 drivers/usb/core/hub.c:5378 1 lock held by syz-executor.1/15164: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.2.0-rc1+ #10 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+0x48/0x87 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1bd lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0x989/0xe20 kernel/hung_task.c:288 kthread+0x30b/0x410 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13004 Comm: kworker/1:3 Not tainted 5.2.0-rc1+ #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RIP: 0010:do_raw_spin_lock+0x6d/0x280 kernel/locking/spinlock_debug.c:112 Code: 14 03 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 48 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c6 01 00 00 81 RSP: 0018:ffff8881db309c78 EFLAGS: 00000803 RAX: dffffc0000000000 RBX: 1ffff1103b661390 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8881d94c50d8 RDI: ffffffff893839ec RBP: ffffffff893839e8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8881d94c50d8 R11: ffff8881d94c4800 R12: 0000000000000002 R13: dffffc0000000000 R14: 1ffff1103b6613aa R15: ffff8881b4cb7dd0 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0979e4000 CR3: 00000001d5381000 CR4: 00000000001406e0 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:159 debug_object_deactivate lib/debugobjects.c:540 [inline] debug_object_deactivate+0x104/0x360 lib/debugobjects.c:529 debug_hrtimer_deactivate kernel/time/hrtimer.c:412 [inline] debug_deactivate kernel/time/hrtimer.c:462 [inline] __run_hrtimer kernel/time/hrtimer.c:1359 [inline] __hrtimer_run_queues+0x1a1/0xbc0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x2e8/0x730 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1040 [inline] smp_apic_timer_interrupt+0xc1/0x480 arch/x86/kernel/apic/apic.c:1065 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1740 [inline] RIP: 0010:vprintk_emit+0x3cd/0x3e0 kernel/printk/printk.c:1984 Code: 00 83 fb ff 75 d6 e9 db fc ff ff e8 4d 01 15 00 e8 f8 26 1a 00 41 56 9d e9 b1 fd ff ff e8 3b 01 15 00 e8 e6 26 1a 00 41 56 9d 2a ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 RSP: 0018:ffff8881c7a0f490 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000200 RCX: 1ffff1103b298a10 RDX: 0000000000000000 RSI: ffff8881d94c5088 RDI: ffff8881d94c5034 RBP: ffff8881c7a0f4d8 R08: ffff8881d94c4800 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000043 R13: ffff8881d9e64800 R14: 0000000000000212 R15: 0000000000000000 dev_vprintk_emit+0x4fc/0x541 drivers/base/core.c:3190 dev_printk_emit+0xba/0xf1 drivers/base/core.c:3201 __dev_printk+0x1db/0x203 drivers/base/core.c:3213 _dev_warn+0xd7/0x109 drivers/base/core.c:3257 usb_parse_configuration drivers/usb/core/config.c:629 [inline] usb_get_configuration.cold+0x3bc/0x1696 drivers/usb/core/config.c:882 usb_enumerate_device drivers/usb/core/hub.c:2367 [inline] usb_new_device+0x8d3/0xd50 drivers/usb/core/hub.c:2503 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432 process_one_work+0x905/0x1570 kernel/workqueue.c:2268 process_scheduled_works kernel/workqueue.c:2330 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2416 kthread+0x30b/0x410 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352