device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state INFO: task kworker/0:0:21616 blocked for more than 140 seconds. Not tainted 4.19.60 #33 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:0 D29056 21616 2 0x80000000 kobject: 'rx-0' (000000009f32f9e6): kobject_cleanup, parent 00000000f2f462cd Workqueue: events linkwatch_event Call Trace: kobject: 'rx-0' (000000009f32f9e6): auto cleanup 'remove' event context_switch kernel/sched/core.c:2826 [inline] __schedule+0x80d/0x1c70 kernel/sched/core.c:3474 kobject: 'rx-0' (000000009f32f9e6): kobject_uevent_env schedule+0x92/0x1c0 kernel/sched/core.c:3518 kobject: 'rx-0' (000000009f32f9e6): kobject_uevent_env: uevent_suppress caused the event to drop! schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3576 kobject: 'rx-0' (000000009f32f9e6): auto cleanup kobject_del __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0' (000000009f32f9e6): calling ktype release kobject: 'rx-0': free name mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (000000001fbd095b): kobject_cleanup, parent 00000000f2f462cd kobject: 'tx-0' (000000001fbd095b): auto cleanup 'remove' event rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'tx-0' (000000001fbd095b): kobject_uevent_env linkwatch_event+0xf/0x70 net/core/link_watch.c:236 kobject: 'tx-0' (000000001fbd095b): kobject_uevent_env: uevent_suppress caused the event to drop! process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'tx-0' (000000001fbd095b): auto cleanup kobject_del kobject: 'tx-0' (000000001fbd095b): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000f2f462cd): kobject_cleanup, parent (null) kobject: 'queues' (00000000f2f462cd): calling ktype release worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kobject: 'queues' (00000000f2f462cd): kset_release kobject: 'queues': free name kthread+0x354/0x420 kernel/kthread.c:246 kobject: 'bridge137' (000000004576c151): kobject_uevent_env kobject: 'bridge137' (000000004576c151): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000bb645cc2): kobject_uevent_env ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 kobject: 'batman_adv' (00000000bb645cc2): kobject_uevent_env: filter function caused the event to drop! INFO: task kworker/0:3:6911 blocked for more than 140 seconds. kobject: 'batman_adv' (00000000bb645cc2): kobject_cleanup, parent (null) Not tainted 4.19.60 #33 kobject: 'batman_adv' (00000000bb645cc2): calling ktype release "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: (00000000bb645cc2): dynamic_kobj_release kworker/0:3 D kobject: 'batman_adv': free name 29832 6911 2 0x80000000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x80d/0x1c70 kernel/sched/core.c:3474 schedule+0x92/0x1c0 kernel/sched/core.c:3518 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3576 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.1:7394 blocked for more than 140 seconds. Not tainted 4.19.60 #33 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28216 7394 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x80d/0x1c70 kernel/sched/core.c:3474 schedule+0x92/0x1c0 kernel/sched/core.c:3518 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3576 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 __do_sys_sendto net/socket.c:1799 [inline] __se_sys_sendto net/socket.c:1795 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413673 Code: b0 20 41 00 41 b8 a4 d6 65 00 ba 04 00 00 00 bf 9a 38 44 00 ff 15 15 a0 24 00 85 c0 0f 85 cf fc ff ff 45 31 c9 31 c9 31 f6 41 70 d6 65 00 ba 0b 00 00 00 bf af 38 44 00 e8 09 2f 02 00 85 c0 RSP: 002b:00007ffc2481a428 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000413673 RDX: 0000000000000028 RSI: 0000000000a70070 RDI: 0000000000000003 RBP: 00007ffc2481a490 R08: 00007ffc2481a430 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffc2481a798 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 4 locks held by kworker/u4:1/23: kobject: 'rx-0' (00000000918e16e5): kobject_cleanup, parent 00000000f0c44c89 1 lock held by khungtaskd/1034: kobject: 'rx-0' (00000000918e16e5): auto cleanup 'remove' event #0: 00000000db4c3568 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435 kobject: 'rx-0' (00000000918e16e5): kobject_uevent_env 1 lock held by rsyslogd/7714: kobject: 'rx-0' (00000000918e16e5): kobject_uevent_env: uevent_suppress caused the event to drop! 2 locks held by getty/7836: #0: 000000008ecb24cf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 00000000b979da0e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7837: #0: 00000000428e45cd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 00000000e258e756 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 kobject: 'rx-0' (00000000918e16e5): auto cleanup kobject_del 2 locks held by getty/7838: kobject: 'rx-0' (00000000918e16e5): calling ktype release #0: kobject: 'rx-0': free name 000000000dee48c2 kobject: 'tx-0' (000000002c6f023c): kobject_cleanup, parent 00000000f0c44c89 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 00000000648f89bc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7839: kobject: 'tx-0' (000000002c6f023c): auto cleanup 'remove' event #0: 00000000e6448c34 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 0000000028b0b7c1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7840: #0: 000000003dad90d9 kobject: 'tx-0' (000000002c6f023c): kobject_uevent_env ( kobject: 'tx-0' (000000002c6f023c): kobject_uevent_env: uevent_suppress caused the event to drop! &tty->ldisc_sem kobject: 'tx-0' (000000002c6f023c): auto cleanup kobject_del ){++++} kobject: 'tx-0' (000000002c6f023c): calling ktype release , at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 kobject: 'tx-0': free name #1: kobject: 'queues' (00000000f0c44c89): kobject_cleanup, parent (null) kobject: 'queues' (00000000f0c44c89): calling ktype release kobject: 'queues' (00000000f0c44c89): kset_release kobject: 'queues': free name 0000000070b552e3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7841: #0: 00000000c4bbd4d3 ( kobject: 'bridge136' (00000000b6459c0b): kobject_uevent_env &tty->ldisc_sem kobject: 'bridge136' (00000000b6459c0b): kobject_uevent_env: uevent_suppress caused the event to drop! ){++++} kobject: 'batman_adv' (00000000cc34588f): kobject_uevent_env , at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 kobject: 'batman_adv' (00000000cc34588f): kobject_uevent_env: filter function caused the event to drop! #1: kobject: 'batman_adv' (00000000cc34588f): kobject_cleanup, parent (null) 00000000ff40f751 kobject: 'batman_adv' (00000000cc34588f): calling ktype release ( kobject: (00000000cc34588f): dynamic_kobj_release &ldata->atomic_read_lock kobject: 'batman_adv': free name ){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7842: #0: 000000000c869548 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 #1: 00000000f7475974 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 3 locks held by kworker/0:2/3844: #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000c17b3e41 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000b6133ead ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 0000000051ae9b76 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:0/21616: #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000ae605f25 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 0000000051ae9b76 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/u4:7/24159: #0: 00000000936abbf7 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1821 [inline] #0: 00000000936abbf7 (&rq->lock){-.-.}, at: __schedule+0x1f8/0x1c70 kernel/sched/core.c:3412 #1: 00000000db4c3568 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5995 #2: 00000000db4c3568 (rcu_read_lock){....}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:417 [inline] #2: 00000000db4c3568 (rcu_read_lock){....}, at: batadv_nc_worker+0xe3/0x760 net/batman-adv/network-coding.c:730 3 locks held by kworker/0:3/6911: #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000b034c01d ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000f7716ff6 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 0000000051ae9b76 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.1/7394: #0: 0000000051ae9b76 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 0000000051ae9b76 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1034 Comm: khungtaskd Not tainted 4.19.60 #33 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: kobject: 'rx-0' (0000000049e33dab): kobject_cleanup, parent 00000000435bb77a NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.60 #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:io_serial_out+0x73/0x90 drivers/tty/serial/8250/8250_port.c:456 Code: 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 19 41 03 5c 24 38 44 89 e8 89 da ee <5b> 41 5c 41 5d 5d c3 e8 01 f0 34 fe eb c0 e8 5a f0 34 fe eb e0 0f RSP: 0018:ffff8880aa39f4f0 EFLAGS: 00000002 RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000 RDX: 00000000000003f8 RSI: ffffffff836c99d6 RDI: ffffffff8ad73df8 RBP: ffff8880aa39f508 R08: ffff8880aa38e600 R09: fffffbfff15ae7b9 R10: fffffbfff15ae7b8 R11: ffffffff8ad73dc3 R12: ffffffff8ad73dc0 R13: 000000000000005b R14: ffffffff8ad73dc0 R15: 000000000000005b FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001c91ef8 CR3: 0000000093753000 CR4: 00000000001406e0 Call Trace: serial_port_out include/linux/serial_core.h:273 [inline] serial8250_console_putchar+0x45/0x60 drivers/tty/serial/8250/8250_port.c:3199 uart_console_write+0x54/0x110 drivers/tty/serial/serial_core.c:1879 serial8250_console_write+0x638/0x9f0 drivers/tty/serial/8250/8250_port.c:3264 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590 call_console_drivers kernel/printk/printk.c:1729 [inline] console_unlock+0xbde/0x10b0 kernel/printk/printk.c:2410 vprintk_emit+0x238/0x690 kernel/printk/printk.c:1927 vprintk_default+0x28/0x30 kernel/printk/printk.c:1968 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2001 kobject_cleanup lib/kobject.c:638 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold+0x88/0x2e6 lib/kobject.c:708 net_rx_queue_update_kobjects+0x361/0x480 net/core/net-sysfs.c:979 remove_queue_kobjects net/core/net-sysfs.c:1567 [inline] netdev_unregister_kobject+0x155/0x1f0 net/core/net-sysfs.c:1718 rollback_registered_many+0x7c6/0xf90 net/core/dev.c:8029 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9113 unregister_netdevice_many net/core/dev.c:9112 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9582 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415