BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 52s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 in-flight: 11076:jump_label_update_timeout ====================================================== WARNING: possible circular locking dependency detected 4.18.0-rc3+ #128 Not tainted ------------------------------------------------------ ksoftirqd/0/9 is trying to acquire lock: 000000001a1de198 (console_owner){-.-.}, at: log_next kernel/printk/printk.c:496 [inline] 000000001a1de198 (console_owner){-.-.}, at: console_unlock+0x54e/0x10b0 kernel/printk/printk.c:2376 but task is already holding lock: 000000007c8f987b (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.48+0xb16/0x15ec kernel/workqueue.c:4542 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&(&pool->lock)->rlock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] __queue_work+0x352/0x1410 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] schedule_work include/linux/workqueue.h:570 [inline] put_pwq+0x175/0x1c0 kernel/workqueue.c:1090 put_pwq_unlocked.part.29+0x34/0x70 kernel/workqueue.c:1107 put_pwq_unlocked kernel/workqueue.c:1101 [inline] destroy_workqueue+0x880/0x9d0 kernel/workqueue.c:4202 bond_destructor+0x44/0x60 drivers/net/bonding/bond_main.c:4249 netdev_run_todo+0x65f/0xa80 net/core/dev.c:8255 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117 default_device_exit_batch+0x45e/0x560 net/core/dev.c:9044 ops_exit_list.isra.7+0x105/0x160 net/core/net_namespace.c:155 cleanup_net+0x537/0xb50 net/core/net_namespace.c:523 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 -> #3 (&pool->lock/1){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] __queue_work+0x352/0x1410 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] tty_schedule_flip+0x14c/0x1d0 drivers/tty/tty_buffer.c:408 tty_flip_buffer_push+0x15/0x20 drivers/tty/tty_buffer.c:547 pty_write+0x19d/0x1f0 drivers/tty/pty.c:124 n_tty_write+0xc5b/0x11a0 drivers/tty/n_tty.c:2340 do_tty_write drivers/tty/tty_io.c:963 [inline] tty_write+0x45f/0xae0 drivers/tty/tty_io.c:1051 __vfs_write+0x117/0x9f0 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 tty_port_tty_get+0x20/0x80 drivers/tty/tty_port.c:288 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:390 uart_write_wakeup+0x44/0x60 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x4be/0xb60 drivers/tty/serial/8250/8250_port.c:1808 serial8250_handle_irq.part.25+0x1ee/0x280 drivers/tty/serial/8250/8250_port.c:1881 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1867 [inline] serial8250_default_handle_irq+0xc8/0x150 drivers/tty/serial/8250/8250_port.c:1897 serial8250_interrupt+0xfa/0x1d0 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x1c8/0xaf0 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 ret_from_intr+0x0/0x1e native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xc7/0x450 arch/x86/kernel/process.c:500 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:491 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3aa/0x570 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 start_secondary+0x433/0x5d0 arch/x86/kernel/smpboot.c:265 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 serial8250_console_write+0x8d5/0xb00 drivers/tty/serial/8250/8250_port.c:3230 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590 call_console_drivers kernel/printk/printk.c:1718 [inline] console_unlock+0xab1/0x10b0 kernel/printk/printk.c:2389 vprintk_emit+0x6c6/0xdf0 kernel/printk/printk.c:1907 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0xa7/0xcf kernel/printk/printk.c:1981 register_console+0x7e7/0xc00 kernel/printk/printk.c:2704 univ8250_console_init+0x3f/0x4b drivers/tty/serial/8250/8250_core.c:685 console_init+0x6e1/0xa54 kernel/printk/printk.c:2788 start_kernel+0x610/0x949 init/main.c:661 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242 -> #0 (console_owner){-.-.}: lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 console_lock_spinning_enable kernel/printk/printk.c:1581 [inline] console_unlock+0x5bb/0x10b0 kernel/printk/printk.c:2386 vprintk_emit+0x6c6/0xdf0 kernel/printk/printk.c:1907 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0xa7/0xcf kernel/printk/printk.c:1981 show_pwq kernel/workqueue.c:4449 [inline] show_workqueue_state.cold.48+0xcb8/0x15ec kernel/workqueue.c:4544 wq_watchdog_timer_fn+0x709/0x830 kernel/workqueue.c:5556 call_timer_fn+0x242/0x970 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7a6/0xc70 kernel/time/timer.c:1666 run_timer_softirq+0x60/0x70 kernel/time/timer.c:1694 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 run_ksoftirqd+0x86/0x100 kernel/softirq.c:649 smpboot_thread_fn+0x417/0x870 kernel/smpboot.c:164 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 other info that might help us debug this: Chain exists of: console_owner --> &pool->lock/1 --> &(&pool->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&pool->lock)->rlock); lock(&pool->lock/1); lock(&(&pool->lock)->rlock); lock(console_owner); *** DEADLOCK *** 4 locks held by ksoftirqd/0/9: #0: 000000009d1933ae ((&wq_watchdog_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:178 [inline] #0: 000000009d1933ae ((&wq_watchdog_timer)){+.-.}, at: call_timer_fn+0x1cd/0x970 kernel/time/timer.c:1316 #1: 00000000e5bfc094 (rcu_read_lock_sched){....}, at: show_workqueue_state+0x0/0x1d0 kernel/workqueue.c:4408 #2: 000000007c8f987b (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.48+0xb16/0x15ec kernel/workqueue.c:4542 #3: 00000000ec8a1021 (console_lock){+.+.}, at: console_trylock_spinning kernel/printk/printk.c:1643 [inline] #3: 00000000ec8a1021 (console_lock){+.+.}, at: vprintk_emit+0x6ad/0xdf0 kernel/printk/printk.c:1906 stack backtrace: CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.18.0-rc3+ #128 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_circular_bug.isra.36.cold.57+0x1bd/0x27d kernel/locking/lockdep.c:1227 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2421 [inline] __lock_acquire+0x3449/0x5020 kernel/locking/lockdep.c:3435 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 console_lock_spinning_enable kernel/printk/printk.c:1581 [inline] console_unlock+0x5bb/0x10b0 kernel/printk/printk.c:2386 vprintk_emit+0x6c6/0xdf0 kernel/printk/printk.c:1907 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0xa7/0xcf kernel/printk/printk.c:1981 show_pwq kernel/workqueue.c:4449 [inline] show_workqueue_state.cold.48+0xcb8/0x15ec kernel/workqueue.c:4544 wq_watchdog_timer_fn+0x709/0x830 kernel/workqueue.c:5556 call_timer_fn+0x242/0x970 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7a6/0xc70 kernel/time/timer.c:1666 run_timer_softirq+0x60/0x70 kernel/time/timer.c:1694 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 run_ksoftirqd+0x86/0x100 kernel/softirq.c:649 smpboot_thread_fn+0x417/0x870 kernel/smpboot.c:164 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=12/256 in-flight: 26:jump_label_update_timeout pending: perf_sched_delayed, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap, check_corruption workqueue events_power_efficient: flags=0x80 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 pending: gc_worker, device_uncache_fw_images_work workqueue mm_percpu_wq: flags=0x8 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update workqueue netns: flags=0xe000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 in-flight: 10033:cleanup_net workqueue kblockd: flags=0x18 pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_mq_requeue_work workqueue dm_bufio_cache: flags=0x8 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: work_fn pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=53s workers=5 idle: 4953 4851 5 27 pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=5 idle: 5053 2004 19 25 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 23 7 10041 1876 52 6721 netlink: 25 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 25 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 25 bytes leftover after parsing attributes in process `syz-executor2'. binder: 17007:17010 got reply transaction with bad transaction stack, transaction 45 has target 17007:0 binder: 17007:17010 transaction failed 29201/-71, size 0-0 line 2774 binder_alloc: binder_alloc_mmap_handler: 17007 20001000-20004000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 17007:17010 ioctl 40046207 0 returned -16 netlink: 25 bytes leftover after parsing attributes in process `syz-executor2'. binder_alloc: 17007: binder_alloc_buf, no vma binder: 17007:17056 transaction failed 29189/-3, size 0-0 line 2967 binder: 17007:17057 got reply transaction with no transaction stack binder: 17007:17057 transaction failed 29201/-71, size 0-0 line 2759 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: BINDER_SET_CONTEXT_MGR already set binder: release 17007:17010 transaction 45 out, still active binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: 17068:17080 ioctl 40046207 0 returned -16 binder_alloc: 17007: binder_alloc_buf, no vma binder: 17068:17080 transaction failed 29189/-3, size 0-0 line 2967 binder: send failed reply for transaction 45, target dead binder: undelivered TRANSACTION_ERROR: 29189 binder: 17125:17126 got reply transaction with bad transaction stack, transaction 51 has target 17125:0 binder: 17125:17126 transaction failed 29201/-71, size 0-0 line 2774 binder: BINDER_SET_CONTEXT_MGR already set binder: 17145:17148 ioctl 40046207 0 returned -16 binder: 17145:17148 got reply transaction with bad transaction stack, transaction 53 has target 17125:0 binder: 17145:17148 transaction failed 29201/-71, size 0-0 line 2774 binder: send failed reply for transaction 51 to 17125:17126 binder: send failed reply for transaction 53 to 17145:17148 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17175:17176 got reply transaction with bad transaction stack, transaction 56 has target 17175:0 binder: 17175:17176 transaction failed 29201/-71, size 0-0 line 2774 binder: BINDER_SET_CONTEXT_MGR already set binder: 17172:17173 ioctl 40046207 0 returned -16 binder: send failed reply for transaction 56 to 17175:17176 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17172:17173 got reply transaction with bad transaction stack, transaction 59 has target 17196:0 binder: 17172:17173 transaction failed 29201/-71, size 0-0 line 2774 binder: 17196:17197 got reply transaction with bad transaction stack, transaction 61 has target 17196:0 binder: 17196:17197 transaction failed 29201/-71, size 0-0 line 2774 binder: release 17172:17173 transaction 59 out, still active binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: BINDER_SET_CONTEXT_MGR already set binder: 17212:17221 ioctl 40046207 0 returned -16 binder: send failed reply for transaction 59, target dead binder: send failed reply for transaction 61 to 17196:17197 binder: send failed reply for transaction 63 to 17212:17221 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: BINDER_SET_CONTEXT_MGR already set binder: BINDER_SET_CONTEXT_MGR already set binder: release 17245:17248 transaction 65 out, still active binder: undelivered TRANSACTION_COMPLETE binder: 17267:17272 ioctl 40046207 0 returned -16 binder: send failed reply for transaction 65, target dead binder: 17254:17259 ioctl 40046207 0 returned -16 binder: 17254:17259 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: BINDER_SET_CONTEXT_MGR already set binder: 17316:17319 ioctl 40046207 0 returned -16 binder: 17316:17319 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: send failed reply for transaction 70 to 17363:17369 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: 17397:17399 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17430:17431 transaction failed 29189/-22, size 0-0 line 2852 binder: BINDER_SET_CONTEXT_MGR already set binder: 17446:17448 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 17445:17447 transaction 74 out, still active binder: undelivered TRANSACTION_COMPLETE binder_alloc: 17445: binder_alloc_buf, no vma binder: send failed reply for transaction 74, target dead binder: 17463:17468 transaction failed 29189/-3, size 0-0 line 2967 binder: send failed reply for transaction 75 to 17446:17448 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17495:17496 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17533:17536 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: send failed reply for transaction 80 to 17554:17555 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: 17570:17578 transaction failed 29189/-22, size 0-0 line 2852 binder: send failed reply for transaction 83 to 17582:17583 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 17614:17616 transaction 86 out, still active binder: undelivered TRANSACTION_COMPLETE binder: BINDER_SET_CONTEXT_MGR already set binder: release 17621:17622 transaction 85 out, still active binder: undelivered TRANSACTION_COMPLETE binder: 17640:17642 ioctl 40046207 0 returned -16 binder: send failed reply for transaction 85, target dead binder: send failed reply for transaction 86, target dead binder: 17668:17678 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17716:17730 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189 binder: 17752:17753 transaction failed 29189/-22, size 0-0 line 2852 binder: undelivered TRANSACTION_ERROR: 29189