protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 INFO: task kworker/1:2:2741 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:2 D25152 2741 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/1:0:31794 blocked for more than 140 seconds. Not tainted 4.19.80 #0 kobject: 'rx-0' (0000000022f7bc0f): kobject_cleanup, parent 00000000a706bfa1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (0000000022f7bc0f): auto cleanup 'remove' event kworker/1:0 D27296 31794 2 0x80000000 kobject: 'rx-0' (0000000022f7bc0f): kobject_uevent_env Workqueue: events switchdev_deferred_process_work kobject: 'rx-0' (0000000022f7bc0f): kobject_uevent_env: uevent_suppress caused the event to drop! Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 kobject: 'rx-0' (0000000022f7bc0f): auto cleanup kobject_del kobject: 'rx-0' (0000000022f7bc0f): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000006974cba0): kobject_cleanup, parent 00000000a706bfa1 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 kobject: 'tx-0' (000000006974cba0): auto cleanup 'remove' event __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'tx-0' (000000006974cba0): kobject_uevent_env kobject: 'tx-0' (000000006974cba0): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000006974cba0): auto cleanup kobject_del kobject: 'tx-0' (000000006974cba0): calling ktype release kobject: 'tx-0': free name mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'queues' (00000000a706bfa1): kobject_cleanup, parent (null) kobject: 'queues' (00000000a706bfa1): calling ktype release rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 kobject: 'queues' (00000000a706bfa1): kset_release switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:150 kobject: 'queues': free name process_one_work+0x989/0x1750 kernel/workqueue.c:2153 kobject: 'bridge3207' (0000000058ceb7de): kobject_uevent_env kobject: 'bridge3207' (0000000058ceb7de): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (00000000a0b2b17f): kobject_uevent_env kobject: 'batman_adv' (00000000a0b2b17f): kobject_uevent_env: filter function caused the event to drop! kobject: 'batman_adv' (00000000a0b2b17f): kobject_cleanup, parent (null) worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kobject: 'batman_adv' (00000000a0b2b17f): calling ktype release kthread+0x354/0x420 kernel/kthread.c:246 kobject: (00000000a0b2b17f): dynamic_kobj_release kobject: 'batman_adv': free name ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.5:29546 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29336 29546 7520 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+0x17/0x20 net/core/rtnetlink.c:77 sock_do_ioctl+0x24e/0x2f0 net/socket.c:963 sock_ioctl+0x325/0x610 net/socket.c:1074 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459f49 Code: Bad RIP value. RSP: 002b:00007f08d7b76c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459f49 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f08d7b776d4 R13: 00000000004c3b30 R14: 00000000004d7be8 R15: 00000000ffffffff INFO: task syz-executor.3:29653 blocked for more than 140 seconds. kobject: 'rx-0' (00000000b53f64dd): kobject_cleanup, parent 000000004ef4b562 Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'rx-0' (00000000b53f64dd): auto cleanup 'remove' event syz-executor.3 D28216 29653 1 0x00000004 kobject: 'rx-0' (00000000b53f64dd): 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 kobject: 'rx-0' (00000000b53f64dd): kobject_uevent_env: uevent_suppress caused the event to drop! __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 kobject: 'rx-0' (00000000b53f64dd): auto cleanup kobject_del kobject: 'rx-0' (00000000b53f64dd): calling ktype release kobject: 'rx-0': free name mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 kobject: 'tx-0' (000000002664c287): kobject_cleanup, parent 000000004ef4b562 kobject: 'tx-0' (000000002664c287): auto cleanup 'remove' event rtnl_lock net/core/rtnetlink.c:77 [inline] rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 kobject: 'tx-0' (000000002664c287): kobject_uevent_env kobject: 'tx-0' (000000002664c287): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'tx-0' (000000002664c287): auto cleanup kobject_del kobject: 'tx-0' (000000002664c287): calling ktype release netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 kobject: 'tx-0': free name kobject: 'queues' (000000004ef4b562): kobject_cleanup, parent (null) kobject: 'queues' (000000004ef4b562): calling ktype release kobject: 'queues' (000000004ef4b562): kset_release kobject: 'queues': free name rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 kobject: 'bridge3206' (0000000092a566f0): kobject_uevent_env netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 kobject: 'bridge3206' (0000000092a566f0): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'batman_adv' (000000009aa1fa5e): kobject_uevent_env kobject: 'batman_adv' (000000009aa1fa5e): kobject_uevent_env: filter function caused the event to drop! netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 kobject: 'batman_adv' (000000009aa1fa5e): kobject_cleanup, parent (null) kobject: 'batman_adv' (000000009aa1fa5e): calling ktype release kobject: (000000009aa1fa5e): dynamic_kobj_release kobject: 'batman_adv': free name 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: 0033:0x413c43 Code: 0f bf bc 24 c8 00 00 00 e8 ba 76 ff ff 66 41 c7 84 24 c8 00 00 00 ff ff ba 9c 24 44 00 89 5d 00 4c 89 e1 be ff ff ff ff 31 ff <31> c0 ff 15 5d 5c 24 00 ba 29 f8 ff ff e9 27 ff ff ff 0f 1f 00 41 RSP: 002b:00007ffe8b4c4fa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000413c43 RDX: 0000000000000028 RSI: 0000000000a71df0 RDI: 0000000000000003 RBP: 00007ffe8b4c5010 R08: 00007ffe8b4c4fb0 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffe8b4c5318 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:29655 blocked for more than 140 seconds. Not tainted 4.19.80 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28216 29655 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: 0033:0x413c43 Code: 0f bf bc 24 c8 00 00 00 e8 ba 76 ff ff 66 41 c7 84 24 c8 00 00 00 ff ff ba 9c 24 44 00 89 5d 00 4c 89 e1 be ff ff ff ff 31 ff <31> c0 ff 15 5d 5c 24 00 ba 29 f8 ff ff e9 27 ff ff ff 0f 1f 00 41 RSP: 002b:00007ffd50c0fe78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000413c43 RDX: 0000000000000028 RSI: 0000000000a71df0 RDI: 0000000000000003 RBP: 00007ffd50c0fee0 R08: 00007ffd50c0fe80 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffd50c101e8 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1036: kobject: 'rx-0' (0000000093cb8103): kobject_cleanup, parent 000000004cdd3969 #0: kobject: 'rx-0' (0000000093cb8103): auto cleanup 'remove' event kobject: 'rx-0' (0000000093cb8103): kobject_uevent_env kobject: 'rx-0' (0000000093cb8103): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'rx-0' (0000000093cb8103): auto cleanup kobject_del kobject: 'rx-0' (0000000093cb8103): calling ktype release 0000000032d0928a kobject: 'rx-0': free name kobject: 'tx-0' (00000000a8055663): kobject_cleanup, parent 000000004cdd3969 kobject: 'tx-0' (00000000a8055663): auto cleanup 'remove' event ( kobject: 'tx-0' (00000000a8055663): kobject_uevent_env rcu_read_lock kobject: 'tx-0' (00000000a8055663): kobject_uevent_env: uevent_suppress caused the event to drop! ){....} kobject: 'tx-0' (00000000a8055663): auto cleanup kobject_del , at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 kobject: 'tx-0' (00000000a8055663): calling ktype release 3 locks held by kworker/1:2/2741: kobject: 'tx-0': free name kobject: 'queues' (000000004cdd3969): kobject_cleanup, parent (null) kobject: 'queues' (000000004cdd3969): calling ktype release kobject: 'queues' (000000004cdd3969): kset_release kobject: 'queues': free name #0: kobject: 'bridge3205' (00000000dda46f52): kobject_uevent_env 000000008ceddc51 kobject: 'bridge3205' (00000000dda46f52): kobject_uevent_env: uevent_suppress caused the event to drop! ( kobject: 'batman_adv' (00000000028717c3): kobject_uevent_env (wq_completion)"events" kobject: 'batman_adv' (00000000028717c3): kobject_uevent_env: filter function caused the event to drop! ){+.+.} kobject: 'batman_adv' (00000000028717c3): kobject_cleanup, parent (null) , at: __write_once_size include/linux/compiler.h:220 [inline] , at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] , at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] , at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] , at: set_work_data kernel/workqueue.c:617 [inline] , at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] , at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 kobject: 'batman_adv' (00000000028717c3): calling ktype release #1: kobject: (00000000028717c3): dynamic_kobj_release kobject: 'batman_adv': free name 00000000f5e3845f ((linkwatch_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 2 locks held by rsyslogd/7340: #0: 00000000b92f9b63 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 #1: 00000000ad1868a1 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1821 [inline] #1: 00000000ad1868a1 (&rq->lock){-.-.}, at: __schedule+0x1f8/0x1dc0 kernel/sched/core.c:3453 2 locks held by getty/7463: #0: 00000000f83b2d7c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000c5771ad6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7464: #0: 0000000048110204 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000402174d2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7465: #0: 00000000c4ee77f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000d457af7e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7466: #0: 00000000c16f237c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000008a81359d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7467: #0: 000000003137a9ff (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000bacdbe90 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7468: #0: 000000006cc79aa5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000754e3ce4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7469: #0: 000000000958f89e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000004458f52a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 3 locks held by kworker/1:0/31794: #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000008ceddc51 ((wq_completion)"events"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 0000000044dc5a14 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 4 locks held by kworker/u4:2/8070: #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 0000000008cda83e ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000dfb6ff9e (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000981687aa (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:519 #3: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 3 locks held by kworker/0:1/2025: #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000041121e2 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1750 kernel/workqueue.c:2124 #1: 00000000b1915ca2 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1750 kernel/workqueue.c:2128 #2: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.5/29546: #0: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77 1 lock held by syz-executor.3/29653: #0: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 1 lock held by syz-executor.1/29655: #0: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000df0c94aa (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:4744 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1036 Comm: khungtaskd Not tainted 4.19.80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'rx-0' (00000000cfa3cdd8): kobject_cleanup, parent 00000000cc77bcb2 Call Trace: kobject: 'rx-0' (00000000cfa3cdd8): auto cleanup 'remove' event __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 kobject: 'rx-0' (00000000cfa3cdd8): kobject_uevent_env nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 kobject: 'rx-0' (00000000cfa3cdd8): kobject_uevent_env: uevent_suppress caused the event to drop! 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 kobject: 'rx-0' (00000000cfa3cdd8): auto cleanup kobject_del kthread+0x354/0x420 kernel/kthread.c:246 kobject: 'rx-0' (00000000cfa3cdd8): calling ktype release kobject: 'rx-0': free name ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: kobject: 'tx-0' (000000003e4b7521): kobject_cleanup, parent 00000000cc77bcb2 NMI backtrace for cpu 0 CPU: 0 PID: 8070 Comm: kworker/u4:2 Not tainted 4.19.80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:450 Code: e1 00 00 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 17 41 03 5c 24 38 89 da ec <5b> 0f b6 c0 41 5c 5d c3 e8 28 4c 35 fe eb c2 e8 81 4c 35 fe eb e2 RSP: 0018:ffff88821b18f4b8 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: ffffffff836c1061 RDI: ffffffff8ad86ef8 RBP: ffff88821b18f4c8 R08: ffff88805b240340 R09: fffffbfff15b0dd9 R10: fffffbfff15b0dd8 R11: ffffffff8ad86ec3 R12: ffffffff8ad86ec0 R13: 0000000000000020 R14: 0000000000000000 R15: fffffbfff15b0de1 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc9e8002440 CR3: 000000009544c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_in drivers/tty/serial/8250/8250.h:111 [inline] wait_for_xmitr+0xa1/0x230 drivers/tty/serial/8250/8250_port.c:2028 serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3199 uart_console_write+0x54/0x110 drivers/tty/serial/serial_core.c:1884 serial8250_console_write+0x638/0x9f0 drivers/tty/serial/8250/8250_port.c:3265 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 netdev_queue_update_kobjects+0x250/0x3d0 net/core/net-sysfs.c:1515 remove_queue_kobjects net/core/net-sysfs.c:1568 [inline] netdev_unregister_kobject+0x162/0x1f0 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