team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves INFO: task kworker/1:0:19 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:0 D26432 19 2 0x80000000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __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 addrconf_dad_work+0xad/0x1150 net/ipv6/addrconf.c:3975 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 kworker/0:2:21602 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:2 D27928 21602 2 0x80000000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __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 linkwatch_event+0xf/0x70 net/core/link_watch.c:236 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 kworker/0:3:25978 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000efc924ec): kobject_cleanup, parent 00000000be8515bb kworker/0:3 D27920 25978 2 0x80000000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (00000000efc924ec): auto cleanup 'remove' event schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0' (00000000efc924ec): kobject_uevent_env kobject: 'rx-0' (00000000efc924ec): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000efc924ec): auto cleanup kobject_del kobject: 'rx-0' (00000000efc924ec): calling ktype release mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'rx-0': free name kobject: 'tx-0' (000000005a3669d8): kobject_cleanup, parent 00000000be8515bb rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'tx-0' (000000005a3669d8): auto cleanup 'remove' event addrconf_dad_work+0xad/0x1150 net/ipv6/addrconf.c:3975 kobject: 'tx-0' (000000005a3669d8): kobject_uevent_env kobject: 'tx-0' (000000005a3669d8): kobject_uevent_env: uevent_suppress caused the event to drop! process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'tx-0' (000000005a3669d8): auto cleanup kobject_del kobject: 'tx-0' (000000005a3669d8): calling ktype release 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 kobject: 'tx-0': free name INFO: task kworker/1:3:25979 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D26864 25979 2 0x80000000 kobject: 'queues' (00000000be8515bb): kobject_cleanup, parent (null) Workqueue: events switchdev_deferred_process_work kobject: 'queues' (00000000be8515bb): calling ktype release Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'queues' (00000000be8515bb): kset_release kobject: 'queues': free name kobject: 'bridge2420' (000000006c60bcce): kobject_uevent_env mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'bridge2420' (000000006c60bcce): kobject_uevent_env: uevent_suppress caused the event to drop! switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150 kobject: 'batman_adv' (00000000f0545f58): kobject_uevent_env process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'batman_adv' (00000000f0545f58): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000f0545f58): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000f0545f58): calling ktype release kobject: (00000000f0545f58): dynamic_kobj_release kobject: 'batman_adv': free name 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.5:30772 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D24056 30772 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __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: 0033:0x413f13 Code: 00 48 89 d6 f3 a6 75 0c 48 c7 00 a0 3f 41 00 e9 3b ff ff ff bf a4 30 44 00 b9 11 00 00 00 48 89 d6 f3 a6 75 0c 48 c7 00 c0 3f <41> 00 e9 1e ff ff ff bf b5 30 44 00 b9 18 00 00 00 48 89 d6 f3 a6 RSP: 002b:00007fff556f5158 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000413f13 RDX: 0000000000000028 RSI: 0000000000a71df0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff556f5160 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000006 INFO: task syz-executor.2:30811 blocked for more than 140 seconds. Not tainted 4.19.82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24152 30811 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __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: 0033:0x413f13 Code: 8d 6c 24 18 48 8d 05 1c 05 04 00 48 89 44 24 08 48 8b 44 24 28 48 89 44 24 10 48 8d 44 24 08 48 89 04 24 e8 df 32 04 00 48 8b <6c> 24 18 48 83 c4 20 c3 e8 20 34 04 00 eb ae cc cc cc cc cc cc cc RSP: 002b:00007fffc58ed0b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000413f13 RDX: 000000000000003c RSI: 0000000000a71df0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffc58ed0c0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000003 R14: 00007fffc58ed210 R15: 00000000004bf6ba INFO: task syz-executor.3:30813 blocked for more than 140 seconds. Not tainted 4.19.82 #0 kobject: 'rx-0' (00000000cf9e1578): kobject_cleanup, parent 00000000164c0882 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000cf9e1578): auto cleanup 'remove' event syz-executor.3 D24152 30813 1 0x00000004 Call Trace: kobject: 'rx-0' (00000000cf9e1578): kobject_uevent_env context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (00000000cf9e1578): kobject_uevent_env: uevent_suppress caused the event to drop! schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'rx-0' (00000000cf9e1578): 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' (00000000cf9e1578): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (0000000000fc45ce): kobject_cleanup, parent 00000000164c0882 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 kobject: 'tx-0' (0000000000fc45ce): auto cleanup 'remove' event kobject: 'tx-0' (0000000000fc45ce): kobject_uevent_env kobject: 'tx-0' (0000000000fc45ce): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (0000000000fc45ce): auto cleanup kobject_del netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 kobject: 'tx-0' (0000000000fc45ce): calling ktype release kobject: 'tx-0': free name rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 kobject: 'queues' (00000000164c0882): kobject_cleanup, parent (null) netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 kobject: 'queues' (00000000164c0882): calling ktype release kobject: 'queues' (00000000164c0882): kset_release kobject: 'queues': free name netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 kobject: 'bridge2419' (00000000996f2e9c): kobject_uevent_env sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 kobject: 'bridge2419' (00000000996f2e9c): kobject_uevent_env: uevent_suppress caused the event to drop! __sys_sendto+0x262/0x380 net/socket.c:1787 kobject: 'batman_adv' (000000007772379d): kobject_uevent_env kobject: 'batman_adv' (000000007772379d): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (000000007772379d): kobject_cleanup, parent (null) kobject: 'batman_adv' (000000007772379d): calling ktype release kobject: (000000007772379d): dynamic_kobj_release kobject: 'batman_adv': free name __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: 0033:0x413f13 Code: 00 48 89 d6 f3 a6 75 0c 48 c7 00 a0 3f 41 00 e9 3b ff ff ff bf a4 30 44 00 b9 11 00 00 00 48 89 d6 f3 a6 75 0c 48 c7 00 c0 3f <41> 00 e9 1e ff ff ff bf b5 30 44 00 b9 18 00 00 00 48 89 d6 f3 a6 RSP: 002b:00007ffc347348a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000413f13 RDX: 0000000000000038 RSI: 0000000000a71df0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc347348b0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000003 R14: 00007ffc34734a00 R15: 00000000004c6147 Showing all locks held in the system: 3 locks held by kworker/1:0/19: #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 000000000e25705d ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by khungtaskd/1040: #0: 000000004ec1c803 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 2 locks held by getty/7596: #0: 00000000f02568f7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000d8940421 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7597: #0: 000000005e9bc4db (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000086aefba (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7598: #0: 0000000079e93207 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000005292556a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7599: #0: 00000000386cf09c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000005efd44ff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7600: #0: 00000000e7f5f6dd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000000e9002de (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7601: #0: 0000000032dbfe55 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000a5c859da (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7602: #0: 000000000dd22ed0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000000f98899f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 4 locks held by kworker/u4:3/32526: #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000bcd46f55 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000eaf9df4f (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000c835bc21 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:519 #3: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:2/21602: #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000dc7fc479 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:3/25978: #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000024a805b0 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000fd570d68 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/1:3/25979: #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000bcaaed5c ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000057892ea1 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.5/30772: #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 1 lock held by syz-executor.2/30811: #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 1 lock held by syz-executor.3/30813: #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000dc7cfd24 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 ============================================= NMI backtrace for cpu 0 kobject: 'rx-0' (0000000025d28e2d): kobject_cleanup, parent 00000000be616046 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 4.19.82 #0 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 kobject: 'rx-0' (0000000025d28e2d): auto cleanup 'remove' event 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 kobject: 'rx-0' (0000000025d28e2d): kobject_uevent_env ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 kobject: 'rx-0' (0000000025d28e2d): kobject_uevent_env: uevent_suppress caused the event to drop! Sending NMI from CPU 0 to CPUs 1: kobject: 'rx-0' (0000000025d28e2d): auto cleanup kobject_del NMI backtrace for cpu 1 CPU: 1 PID: 32526 Comm: kworker/u4:3 Not tainted 4.19.82 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:lookup_object lib/debugobjects.c:156 [inline] RIP: 0010:debug_object_deactivate lib/debugobjects.c:542 [inline] RIP: 0010:debug_object_deactivate+0x174/0x360 lib/debugobjects.c:529 Code: 3c 2a 00 0f 85 8e 01 00 00 4d 8b 24 24 4d 85 e4 0f 84 e9 00 00 00 49 8d 7c 24 18 83 c3 01 48 89 fa 48 c1 ea 03 42 80 3c 2a 00 <0f> 85 3f 01 00 00 4d 3b 7c 24 18 75 c0 49 8d 7c 24 10 48 b8 00 00 RSP: 0018:ffff8880ae907cf0 EFLAGS: 00000046 RAX: 1ffffffff14921d0 RBX: 0000000000000013 RCX: ffffffff8152c6d8 RDX: 1ffff110125c12d5 RSI: ffffffff887aac00 RDI: ffff888092e096a8 RBP: ffff8880ae907dd8 R08: 1ffffffff14921d1 R09: ffffffff8a490e88 R10: 0000000000000082 R11: ffffffff8a490e8b R12: ffff888092e09690 R13: dffffc0000000000 R14: 1ffff11015d20fa2 R15: ffff888054541b80 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009390b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x4c5/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1689 [inline] RIP: 0010:vprintk_emit+0x5b8/0x690 kernel/printk/printk.c:1926 Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 0f 85 a2 00 00 00 48 83 3d 0c 2c 1d 07 00 74 29 e8 bd ab 15 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 79 fe ff ff e8 a9 ab 15 00 0f 0b e8 a2 ab 15 00 RSP: 0018:ffff888219a47750 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88809f784700 RBX: 0000000000000293 RCX: 1ffff11013ef0a03 RDX: 0000000000000000 RSI: ffffffff81551b83 RDI: 0000000000000293 RBP: ffff888219a47798 R08: ffff88809f784700 R09: ffff88809f785018 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000003c R13: 1ffffffff10e48f1 R14: 0000000000000200 R15: ffff8880a81f4680 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:654 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold+0x1f1/0x2e6 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+0x6bb/0xda0 net/core/dev.c:8029 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9115 unregister_netdevice_many net/core/dev.c:9114 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9586 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