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/0:3:7926 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D25088 7926 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+0xa9/0x1110 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/1:3:29035 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (00000000c9a9be01): kobject_cleanup, parent 00000000bb767e98 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000c9a9be01): auto cleanup 'remove' event kworker/1:3 D26384 29035 2 0x80000000 kobject: 'rx-0' (00000000c9a9be01): kobject_uevent_env Workqueue: events switchdev_deferred_process_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 kobject: 'rx-0' (00000000c9a9be01): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000c9a9be01): auto cleanup kobject_del kobject: 'rx-0' (00000000c9a9be01): calling ktype release __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0': free name mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (00000000b80484c0): kobject_cleanup, parent 00000000bb767e98 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 kobject: 'tx-0' (00000000b80484c0): auto cleanup 'remove' event kthread+0x354/0x420 kernel/kthread.c:246 kobject: 'tx-0' (00000000b80484c0): kobject_uevent_env ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/1:5:29133 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'tx-0' (00000000b80484c0): kobject_uevent_env: uevent_suppress caused the event to drop! kworker/1:5 D26384 29133 2 0x80000000 kobject: 'tx-0' (00000000b80484c0): auto cleanup kobject_del Workqueue: ipv6_addrconf addrconf_dad_work kobject: 'tx-0' (00000000b80484c0): calling ktype release Call Trace: kobject: 'tx-0': free name context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'queues' (00000000bb767e98): kobject_cleanup, parent (null) kobject: 'queues' (00000000bb767e98): calling ktype release kobject: 'queues' (00000000bb767e98): kset_release schedule+0x92/0x1c0 kernel/sched/core.c:3559 kobject: 'queues': free name schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'bridge76' (00000000b6b330e2): kobject_uevent_env __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'bridge76' (00000000b6b330e2): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000afdf43ad): kobject_uevent_env mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'batman_adv' (00000000afdf43ad): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000afdf43ad): kobject_cleanup, parent (null) rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'batman_adv' (00000000afdf43ad): calling ktype release addrconf_dad_work+0xa9/0x1110 net/ipv6/addrconf.c:3975 kobject: (00000000afdf43ad): dynamic_kobj_release kobject: 'batman_adv': free name 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/0:6:4854 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:6 D26448 4854 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 syz-executor.3:9517 blocked for more than 140 seconds. kobject: 'rx-0' (0000000046f0b21b): kobject_cleanup, parent 00000000f28b20e1 Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (0000000046f0b21b): auto cleanup 'remove' event syz-executor.3 D24056 9517 1 0x00000004 Call Trace: kobject: 'rx-0' (0000000046f0b21b): kobject_uevent_env context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (0000000046f0b21b): 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 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0' (0000000046f0b21b): auto cleanup kobject_del kobject: 'rx-0' (0000000046f0b21b): calling ktype release kobject: 'rx-0': free name mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (000000003cd64b23): kobject_cleanup, parent 00000000f28b20e1 rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 kobject: 'tx-0' (000000003cd64b23): auto cleanup 'remove' event netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 kobject: 'tx-0' (000000003cd64b23): kobject_uevent_env kobject: 'tx-0' (000000003cd64b23): kobject_uevent_env: uevent_suppress caused the event to drop! rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 kobject: 'tx-0' (000000003cd64b23): auto cleanup kobject_del kobject: 'tx-0' (000000003cd64b23): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000f28b20e1): kobject_cleanup, parent (null) sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 kobject: 'queues' (00000000f28b20e1): calling ktype release __sys_sendto+0x262/0x380 net/socket.c:1787 kobject: 'queues' (00000000f28b20e1): kset_release kobject: 'queues': free name kobject: 'bridge75' (000000004e2fa7d9): kobject_uevent_env __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 kobject: 'bridge75' (000000004e2fa7d9): kobject_uevent_env: uevent_suppress caused the event to drop! do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x414603 Code: e8 d2 a7 ff ff 48 8b 6c 24 18 48 83 c4 20 c3 89 44 24 14 48 8b 44 24 28 48 8d 48 20 48 89 0c 24 48 89 74 24 08 e8 ad e6 00 00 <48> 8b 44 24 28 48 8d 48 10 48 89 0c 24 48 8b 4c 24 30 48 89 4c 24 RSP: 002b:00007ffd9d089138 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414603 RDX: 0000000000000028 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd9d089140 R09: 000000000000000c kobject: 'batman_adv' (00000000e3e7ab05): kobject_uevent_env R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 kobject: 'batman_adv' (00000000e3e7ab05): kobject_uevent_env: filter function caused the event to drop! R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 INFO: task syz-executor.5:9523 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D23936 9523 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'batman_adv' (00000000e3e7ab05): kobject_cleanup, parent (null) kobject: 'batman_adv' (00000000e3e7ab05): calling ktype release kobject: (00000000e3e7ab05): dynamic_kobj_release schedule+0x92/0x1c0 kernel/sched/core.c:3559 kobject: 'batman_adv': free name 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:4765 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 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: 0033:0x414603 Code: e8 d2 a7 ff ff 48 8b 6c 24 18 48 83 c4 20 c3 89 44 24 14 48 8b 44 24 28 48 8d 48 20 48 89 0c 24 48 89 74 24 08 e8 ad e6 00 00 <48> 8b 44 24 28 48 8d 48 10 48 89 0c 24 48 8b 4c 24 30 48 89 4c 24 RSP: 002b:00007fff44cf5848 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414603 RDX: 0000000000000068 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff44cf5850 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 INFO: task syz-executor.4:9524 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24152 9524 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:4765 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 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: 0033:0x414603 Code: e8 d2 a7 ff ff 48 8b 6c 24 18 48 83 c4 20 c3 89 44 24 14 48 8b 44 24 28 48 8d 48 20 48 89 0c 24 48 89 74 24 08 e8 ad e6 00 00 <48> 8b 44 24 28 48 8d 48 10 48 89 0c 24 48 8b 4c 24 30 48 89 4c 24 RSP: 002b:00007ffe70228958 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414603 RDX: 0000000000000068 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffe70228960 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 INFO: task syz-executor.2:9526 blocked for more than 140 seconds. Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (00000000cbfa022d): kobject_cleanup, parent 000000000d0a2a54 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000cbfa022d): auto cleanup 'remove' event syz-executor.2 D24152 9526 1 0x00000004 kobject: 'rx-0' (00000000cbfa022d): kobject_uevent_env 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: 'rx-0' (00000000cbfa022d): kobject_uevent_env: uevent_suppress caused the event to drop! 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:4765 kobject: 'rx-0' (00000000cbfa022d): auto cleanup kobject_del kobject: 'rx-0' (00000000cbfa022d): calling ktype release netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 kobject: 'rx-0': free name rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4786 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 kobject: 'tx-0' (000000002bc49aa8): kobject_cleanup, parent 000000000d0a2a54 kobject: 'tx-0' (000000002bc49aa8): auto cleanup 'remove' event kobject: 'tx-0' (000000002bc49aa8): kobject_uevent_env netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 kobject: 'tx-0' (000000002bc49aa8): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000002bc49aa8): auto cleanup kobject_del kobject: 'tx-0' (000000002bc49aa8): calling ktype release sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1787 kobject: 'tx-0': free name kobject: 'queues' (000000000d0a2a54): kobject_cleanup, parent (null) kobject: 'queues' (000000000d0a2a54): calling ktype release kobject: 'queues' (000000000d0a2a54): kset_release kobject: 'queues': free name kobject: 'bridge74' (000000001fe0fc29): kobject_uevent_env kobject: 'bridge74' (000000001fe0fc29): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (000000009178739c): kobject_uevent_env __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 kobject: 'batman_adv' (000000009178739c): kobject_uevent_env: filter function caused the event to drop! entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'batman_adv' (000000009178739c): kobject_cleanup, parent (null) RIP: 0033:0x414603 kobject: 'batman_adv' (000000009178739c): calling ktype release Code: e8 d2 a7 ff ff 48 8b 6c 24 18 48 83 c4 20 c3 89 44 24 14 48 8b 44 24 28 48 8d 48 20 48 89 0c 24 48 89 74 24 08 e8 ad e6 00 00 <48> 8b 44 24 28 48 8d 48 10 48 89 0c 24 48 8b 4c 24 30 48 89 4c 24 kobject: (000000009178739c): dynamic_kobj_release RSP: 002b:00007ffc49c0fe08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c kobject: 'batman_adv': free name RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414603 RDX: 0000000000000038 RSI: 0000000000a72250 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc49c0fe10 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 Showing all locks held in the system: 1 lock held by khungtaskd/1068: #0: 000000008e22e611 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 1 lock held by rsyslogd/7742: 2 locks held by getty/7864: #0: 0000000086d24068 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000ac7f1fde (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7865: #0: 000000001eee4745 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000e3c4bcfa (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7866: #0: 00000000039b1bfe (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000008910da1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7867: #0: 000000008f871feb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000511803af (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7868: #0: 00000000a951a899 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000046200f99 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7869: #0: 0000000074255a33 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000b33b9e2d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7870: #0: 00000000f195a636 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000007221fe5f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 3 locks held by kworker/0:3/7926: #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000245133c1 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 2 locks held by kworker/u4:1/22793: #0: 00000000061b913d (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9600 [inline] #0: 00000000061b913d (&rq->lock){-.-.}, at: pick_next_task_fair+0xfae/0x1580 kernel/sched/fair.c:6772 #1: 000000008e22e611 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5989 3 locks held by kworker/1:3/29035: #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000cd6574cb (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/1:5/29133: #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000d5e81173 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 000000001d4d5b12 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 4 locks held by kworker/u4:2/32308: #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000006e4cd66 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000c75d80e6 (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000218d7401 (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:520 #3: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:6/4854: #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000000585c6cd ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 000000007e998b58 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.3/9517: #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 1 lock held by syz-executor.5/9523: #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 1 lock held by syz-executor.4/9524: #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 1 lock held by syz-executor.2/9526: #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4765 2 locks held by syz-executor.1/9530: #0: 00000000218d7401 (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1c0/0x33c net/core/net_namespace.c:434 #1: 00000000a8b8975c (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 ============================================= kobject: 'rx-0' (00000000b1d035ec): kobject_cleanup, parent 00000000c9149324 NMI backtrace for cpu 1 CPU: 1 PID: 1068 Comm: khungtaskd Not tainted 4.19.88-syzkaller #0 kobject: 'rx-0' (00000000b1d035ec): auto cleanup 'remove' event 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+0x197/0x210 lib/dump_stack.c:118 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' (00000000b1d035ec): kobject_uevent_env 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' (00000000b1d035ec): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (00000000b1d035ec): auto cleanup kobject_del ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: kobject: 'rx-0' (00000000b1d035ec): calling ktype release NMI backtrace for cpu 0 CPU: 0 PID: 32308 Comm: kworker/u4:2 Not tainted 4.19.88-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:__write_once_size include/linux/compiler.h:219 [inline] RIP: 0010:util_est_enqueue kernel/sched/fair.c:3705 [inline] RIP: 0010:enqueue_task_fair+0x76/0x690 kernel/sched/fair.c:5112 Code: 00 45 8b be 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 79 05 00 00 4c 8b a6 38 02 00 00 <4c> 89 ea 4c 89 e0 48 c1 e8 20 44 39 e0 41 0f 46 c4 48 c1 ea 03 83 RSP: 0018:ffff8880ae807a78 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8880a4380340 RCX: 1ffffffff0f55201 RDX: 1ffff1101487009f RSI: ffff8880a43802c0 RDI: ffff8880a43804f8 RBP: ffff8880ae807ab0 R08: 0000000000000009 R09: ffff8880ae82cdc8 R10: 0000000000000000 R11: ffff8880ae82cdd0 R12: 000000a50000006c R13: ffff8880ae82c3b8 R14: ffff8880ae82c240 R15: 0000000000000408 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009b610000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: enqueue_task kernel/sched/core.c:728 [inline] activate_task+0x107/0x2e0 kernel/sched/core.c:747 ttwu_activate kernel/sched/core.c:1639 [inline] ttwu_do_activate+0xd4/0x1f0 kernel/sched/core.c:1698 ttwu_queue kernel/sched/core.c:1843 [inline] try_to_wake_up+0x825/0xf50 kernel/sched/core.c:2052 wake_up_process+0x10/0x20 kernel/sched/core.c:2124 wake_up_worker kernel/workqueue.c:838 [inline] insert_work+0x2ab/0x3a0 kernel/workqueue.c:1311 __queue_work+0x4c6/0x10a0 kernel/workqueue.c:1461 delayed_work_timer_fn+0x5d/0x90 kernel/workqueue.c:1500 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1359 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x449/0x16a0 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:1696 [inline] RIP: 0010:vprintk_emit+0x5f8/0x6d0 kernel/printk/printk.c:1936 Code: 00 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 0f 85 95 00 00 00 48 83 3d 3c c4 9c 07 00 74 29 e8 ed ab 15 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 c5 fe ff ff e8 d9 ab 15 00 0f 0b e8 d2 ab 15 00 RSP: 0018:ffff88804620f750 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88807410e300 RBX: 0000000000000293 RCX: 1ffff1100e821d83 RDX: 0000000000000000 RSI: ffffffff81559753 RDI: 0000000000000293 RBP: ffff88804620f798 R08: ffff88807410e300 R09: ffff88807410ec18 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000039 R13: 0000000000000200 R14: 1ffffffff11e4b71 R15: ffff8880a816a640 vprintk_default+0x28/0x30 kernel/printk/printk.c:1979 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2012 kobject_cleanup lib/kobject.c:660 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold+0x266/0x2e6 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:8043 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9129 unregister_netdevice_many net/core/dev.c:9128 [inline] default_device_exit_batch+0x34e/0x410 net/core/dev.c:9600 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156 cleanup_net+0x404/0x960 net/core/net_namespace.c:553 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