[ 9.338992][ T204] ip (204) used greatest stack depth: 24304 bytes left [ 9.564739][ T209] ip (209) used greatest stack depth: 24296 bytes left [ 11.520725][ T267] Initializing XFRM netlink socket [ 102.271373][ T1937] ping (1937) used greatest stack depth: 24072 bytes left [ 277.465468][ T12] [ 277.465570][ T12] ======================================================== [ 277.465702][ T12] WARNING: possible irq lock inversion dependency detected [ 277.465824][ T12] 7.1.0-rc5-virtme #1 Not tainted [ 277.465907][ T12] -------------------------------------------------------- [ 277.466030][ T12] kworker/u16:0/12 just changed the state of lock: [ 277.466138][ T12] ffffffffb25b7438 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.466299][ T12] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 277.466421][ T12] (&ndev->lock){++--}-{3:3} [ 277.466424][ T12] [ 277.466424][ T12] [ 277.466424][ T12] and interrupts could create inverse lock ordering between them. [ 277.466424][ T12] [ 277.466739][ T12] [ 277.466739][ T12] other info that might help us debug this: [ 277.466865][ T12] Possible interrupt unsafe locking scenario: [ 277.466865][ T12] [ 277.466992][ T12] CPU0 CPU1 [ 277.467080][ T12] ---- ---- [ 277.467166][ T12] lock(acaddr_hash_lock); [ 277.467253][ T12] local_irq_disable(); [ 277.467356][ T12] lock(&ndev->lock); [ 277.467460][ T12] lock(acaddr_hash_lock); [ 277.467568][ T12] [ 277.467632][ T12] lock(&ndev->lock); [ 277.467695][ T12] [ 277.467695][ T12] *** DEADLOCK *** [ 277.467695][ T12] [ 277.467818][ T12] 4 locks held by kworker/u16:0/12: [ 277.467900][ T12] #0: ff110000019e9d40 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xd55/0x1410 [ 277.468072][ T12] #1: ffa00000000c7d10 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xdb7/0x1410 [ 277.468218][ T12] #2: ffffffffb2498268 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbf/0x940 [ 277.468366][ T12] #3: ffffffffb24b4040 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x9a/0x600 [ 277.468545][ T12] [ 277.468545][ T12] the shortest dependencies between 2nd lock and 1st lock: [ 277.468694][ T12] -> (&ndev->lock){++--}-{3:3} { [ 277.468784][ T12] HARDIRQ-ON-W at: [ 277.468851][ T12] __lock_acquire+0x378/0xc10 [ 277.468959][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.469068][ T12] _raw_write_lock_bh+0x38/0x50 [ 277.469177][ T12] addrconf_permanent_addr+0x108/0x9c0 [ 277.469306][ T12] addrconf_notify+0x151/0xf30 [ 277.469412][ T12] notifier_call_chain+0xb0/0x320 [ 277.469521][ T12] __dev_notify_flags+0xde/0x280 [ 277.469628][ T12] netif_change_flags+0xfe/0x190 [ 277.469731][ T12] do_setlink.isra.0+0x1d25/0x2a60 [ 277.469878][ T12] rtnl_newlink+0x8d1/0xee0 [ 277.469988][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 277.470099][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 277.470250][ T12] netlink_unicast+0x486/0x750 [ 277.470360][ T12] netlink_sendmsg+0x735/0xc60 [ 277.470464][ T12] ____sys_sendmsg+0x419/0x850 [ 277.470580][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 277.470686][ T12] __sys_sendmsg+0x145/0x1f0 [ 277.470792][ T12] do_syscall_64+0x117/0x590 [ 277.470899][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 277.471023][ T12] HARDIRQ-ON-R at: [ 277.471087][ T12] __lock_acquire+0x378/0xc10 [ 277.471191][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.471293][ T12] _raw_read_lock_bh+0x44/0x80 [ 277.471396][ T12] inet6_fill_ifla6_attrs+0x1c9c/0x23e0 [ 277.471526][ T12] inet6_fill_link_af+0x5c/0xe0 [ 277.471627][ T12] rtnl_fill_ifinfo.isra.0+0x1a45/0x2cd0 [ 277.471793][ T12] rtmsg_ifinfo_build_skb+0x144/0x250 [ 277.471916][ T12] rtmsg_ifinfo_event.part.0+0x2c/0x130 [ 277.472041][ T12] rtmsg_ifinfo+0x5c/0xb0 [ 277.472146][ T12] register_netdevice+0x1526/0x1bc0 [ 277.472250][ T12] register_netdev+0x23/0x40 [ 277.472353][ T12] vti6_init_net+0x280/0x3c0 [ 277.472461][ T12] ops_init+0x187/0x560 [ 277.472572][ T12] register_pernet_operations+0x395/0x8e0 [ 277.472695][ T12] register_pernet_device+0x2c/0x60 [ 277.472799][ T12] vti6_tunnel_init+0x17/0x100 [ 277.472907][ T12] do_one_initcall+0x12b/0x520 [ 277.473013][ T12] kernel_init_freeable+0x596/0x630 [ 277.473167][ T12] kernel_init+0x1e/0x170 [ 277.473273][ T12] ret_from_fork+0x474/0x6b0 [ 277.473379][ T12] ret_from_fork_asm+0x11/0x20 [ 277.473483][ T12] IN-SOFTIRQ-W at: [ 277.473550][ T12] __lock_acquire+0x378/0xc10 [ 277.473653][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.473801][ T12] _raw_write_lock+0x33/0x40 [ 277.473908][ T12] addrconf_rs_timer+0xb0/0x770 [ 277.474015][ T12] call_timer_fn+0x163/0x4f0 [ 277.474121][ T12] __run_timers+0x68f/0xab0 [ 277.474227][ T12] run_timer_softirq+0xf0/0x160 [ 277.474332][ T12] handle_softirqs+0x1d8/0x940 [ 277.474438][ T12] __irq_exit_rcu+0x103/0x1c0 [ 277.474547][ T12] irq_exit_rcu+0xe/0x30 [ 277.474650][ T12] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 277.474774][ T12] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 277.474897][ T12] pv_native_safe_halt+0xf/0x10 [ 277.475047][ T12] default_idle+0x9/0x10 [ 277.475152][ T12] default_idle_call+0x6e/0xb0 [ 277.475256][ T12] cpuidle_idle_call.constprop.0+0x237/0x410 [ 277.475393][ T12] do_idle+0xf5/0x160 [ 277.475546][ T12] cpu_startup_entry+0x53/0x70 [ 277.475651][ T12] start_secondary+0x204/0x2b0 [ 277.475758][ T12] common_startup_64+0x13e/0x148 [ 277.475954][ T12] IN-SOFTIRQ-R at: [ 277.476017][ T12] __lock_acquire+0x378/0xc10 [ 277.476122][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.476224][ T12] _raw_read_lock_bh+0x44/0x80 [ 277.476329][ T12] ipv6_get_lladdr+0xa8/0x3f0 [ 277.476478][ T12] addrconf_rs_timer+0x251/0x770 [ 277.476586][ T12] call_timer_fn+0x163/0x4f0 [ 277.476688][ T12] __run_timers+0x68f/0xab0 [ 277.476794][ T12] run_timer_softirq+0xf0/0x160 [ 277.476945][ T12] handle_softirqs+0x1d8/0x940 [ 277.477091][ T12] __irq_exit_rcu+0x103/0x1c0 [ 277.477196][ T12] irq_exit_rcu+0xe/0x30 [ 277.477305][ T12] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 277.477525][ T12] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 277.477654][ T12] pv_native_safe_halt+0xf/0x10 [ 277.477758][ T12] default_idle+0x9/0x10 [ 277.477865][ T12] default_idle_call+0x6e/0xb0 [ 277.477968][ T12] cpuidle_idle_call.constprop.0+0x237/0x410 [ 277.478094][ T12] do_idle+0xf5/0x160 [ 277.478199][ T12] cpu_startup_entry+0x53/0x70 [ 277.478303][ T12] start_secondary+0x204/0x2b0 [ 277.478405][ T12] common_startup_64+0x13e/0x148 [ 277.478510][ T12] INITIAL USE at: [ 277.478579][ T12] __lock_acquire+0x378/0xc10 [ 277.478681][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.478786][ T12] _raw_write_lock_bh+0x38/0x50 [ 277.478890][ T12] addrconf_permanent_addr+0x108/0x9c0 [ 277.479059][ T12] addrconf_notify+0x151/0xf30 [ 277.479164][ T12] notifier_call_chain+0xb0/0x320 [ 277.479311][ T12] __dev_notify_flags+0xde/0x280 [ 277.479416][ T12] netif_change_flags+0xfe/0x190 [ 277.479525][ T12] do_setlink.isra.0+0x1d25/0x2a60 [ 277.479629][ T12] rtnl_newlink+0x8d1/0xee0 [ 277.479732][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 277.479838][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 277.479944][ T12] netlink_unicast+0x486/0x750 [ 277.480048][ T12] netlink_sendmsg+0x735/0xc60 [ 277.480155][ T12] ____sys_sendmsg+0x419/0x850 [ 277.480259][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 277.480406][ T12] __sys_sendmsg+0x145/0x1f0 [ 277.480560][ T12] do_syscall_64+0x117/0x590 [ 277.480663][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 277.480876][ T12] INITIAL READ USE at: [ 277.481002][ T12] __lock_acquire+0x378/0xc10 [ 277.481105][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.481273][ T12] _raw_read_lock_bh+0x44/0x80 [ 277.481376][ T12] inet6_fill_ifla6_attrs+0x1c9c/0x23e0 [ 277.481502][ T12] inet6_fill_link_af+0x5c/0xe0 [ 277.481653][ T12] rtnl_fill_ifinfo.isra.0+0x1a45/0x2cd0 [ 277.481777][ T12] rtmsg_ifinfo_build_skb+0x144/0x250 [ 277.481900][ T12] rtmsg_ifinfo_event.part.0+0x2c/0x130 [ 277.482022][ T12] rtmsg_ifinfo+0x5c/0xb0 [ 277.482125][ T12] register_netdevice+0x1526/0x1bc0 [ 277.482250][ T12] register_netdev+0x23/0x40 [ 277.482352][ T12] vti6_init_net+0x280/0x3c0 [ 277.482457][ T12] ops_init+0x187/0x560 [ 277.482568][ T12] register_pernet_operations+0x395/0x8e0 [ 277.482692][ T12] register_pernet_device+0x2c/0x60 [ 277.482861][ T12] vti6_tunnel_init+0x17/0x100 [ 277.482964][ T12] do_one_initcall+0x12b/0x520 [ 277.483069][ T12] kernel_init_freeable+0x596/0x630 [ 277.483193][ T12] kernel_init+0x1e/0x170 [ 277.483298][ T12] ret_from_fork+0x474/0x6b0 [ 277.483403][ T12] ret_from_fork_asm+0x11/0x20 [ 277.483507][ T12] } [ 277.483556][ T12] ... key at: [] __key.37+0x0/0x40 [ 277.483688][ T12] ... acquired at: [ 277.483753][ T12] __lock_acquire+0x508/0xc10 [ 277.483841][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.483924][ T12] _raw_spin_lock+0x33/0x40 [ 277.484050][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 277.484159][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 277.484241][ T12] addrconf_join_anycast+0x1bc/0x260 [ 277.484327][ T12] __ipv6_ifa_notify+0x75b/0xad0 [ 277.484454][ T12] addrconf_dad_completed+0x14b/0xe10 [ 277.484541][ T12] addrconf_dad_work+0x3c1/0x930 [ 277.484625][ T12] process_one_work+0xdf8/0x1410 [ 277.484710][ T12] worker_thread+0x4f1/0xd60 [ 277.484836][ T12] kthread+0x367/0x460 [ 277.484898][ T12] ret_from_fork+0x474/0x6b0 [ 277.484985][ T12] ret_from_fork_asm+0x11/0x20 [ 277.485072][ T12] [ 277.485116][ T12] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 277.485247][ T12] HARDIRQ-ON-W at: [ 277.485311][ T12] __lock_acquire+0x378/0xc10 [ 277.485418][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.485527][ T12] _raw_spin_lock+0x33/0x40 [ 277.485642][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 277.485766][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 277.485871][ T12] addrconf_join_anycast+0x1bc/0x260 [ 277.485975][ T12] __ipv6_ifa_notify+0x75b/0xad0 [ 277.486081][ T12] addrconf_dad_completed+0x14b/0xe10 [ 277.486233][ T12] addrconf_dad_work+0x3c1/0x930 [ 277.486336][ T12] process_one_work+0xdf8/0x1410 [ 277.486439][ T12] worker_thread+0x4f1/0xd60 [ 277.486556][ T12] kthread+0x367/0x460 [ 277.486640][ T12] ret_from_fork+0x474/0x6b0 [ 277.486789][ T12] ret_from_fork_asm+0x11/0x20 [ 277.486938][ T12] SOFTIRQ-ON-W at: [ 277.487000][ T12] __lock_acquire+0x378/0xc10 [ 277.487105][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.487209][ T12] _raw_spin_lock+0x33/0x40 [ 277.487313][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.487422][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 277.487533][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 277.487639][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 277.487743][ T12] addrconf_notify+0x2c8/0xf30 [ 277.487851][ T12] notifier_call_chain+0xb0/0x320 [ 277.487956][ T12] netif_close_many+0x2c9/0x640 [ 277.488109][ T12] unregister_netdevice_many_notify+0x71a/0x1b30 [ 277.488240][ T12] default_device_exit_batch+0x38b/0x600 [ 277.488365][ T12] ops_undo_list+0x2ce/0x8f0 [ 277.488469][ T12] cleanup_net+0x431/0x940 [ 277.488583][ T12] process_one_work+0xdf8/0x1410 [ 277.488688][ T12] worker_thread+0x4f1/0xd60 [ 277.488794][ T12] kthread+0x367/0x460 [ 277.488879][ T12] ret_from_fork+0x474/0x6b0 [ 277.488984][ T12] ret_from_fork_asm+0x11/0x20 [ 277.489136][ T12] INITIAL USE at: [ 277.489200][ T12] __lock_acquire+0x378/0xc10 [ 277.489304][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.489408][ T12] _raw_spin_lock+0x33/0x40 [ 277.489511][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 277.489642][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 277.489746][ T12] addrconf_join_anycast+0x1bc/0x260 [ 277.489851][ T12] __ipv6_ifa_notify+0x75b/0xad0 [ 277.489959][ T12] addrconf_dad_completed+0x14b/0xe10 [ 277.490066][ T12] addrconf_dad_work+0x3c1/0x930 [ 277.490214][ T12] process_one_work+0xdf8/0x1410 [ 277.490320][ T12] worker_thread+0x4f1/0xd60 [ 277.490426][ T12] kthread+0x367/0x460 [ 277.490511][ T12] ret_from_fork+0x474/0x6b0 [ 277.490621][ T12] ret_from_fork_asm+0x11/0x20 [ 277.490772][ T12] } [ 277.490814][ T12] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 277.490941][ T12] ... acquired at: [ 277.491005][ T12] mark_lock+0x1d7/0xa00 [ 277.491087][ T12] mark_usage+0x105/0x170 [ 277.491171][ T12] __lock_acquire+0x378/0xc10 [ 277.491258][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.491341][ T12] _raw_spin_lock+0x33/0x40 [ 277.491425][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.491516][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 277.491600][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 277.491684][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 277.491812][ T12] addrconf_notify+0x2c8/0xf30 [ 277.491895][ T12] notifier_call_chain+0xb0/0x320 [ 277.492003][ T12] netif_close_many+0x2c9/0x640 [ 277.492089][ T12] unregister_netdevice_many_notify+0x71a/0x1b30 [ 277.492192][ T12] default_device_exit_batch+0x38b/0x600 [ 277.492297][ T12] ops_undo_list+0x2ce/0x8f0 [ 277.492379][ T12] cleanup_net+0x431/0x940 [ 277.492506][ T12] process_one_work+0xdf8/0x1410 [ 277.492593][ T12] worker_thread+0x4f1/0xd60 [ 277.492675][ T12] kthread+0x367/0x460 [ 277.492738][ T12] ret_from_fork+0x474/0x6b0 [ 277.492819][ T12] ret_from_fork_asm+0x11/0x20 [ 277.492902][ T12] [ 277.492943][ T12] [ 277.492943][ T12] stack backtrace: [ 277.493046][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 277.493050][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 277.493052][ T12] Workqueue: netns cleanup_net [ 277.493056][ T12] Call Trace: [ 277.493058][ T12] [ 277.493059][ T12] dump_stack_lvl+0x6f/0xa0 [ 277.493063][ T12] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 277.493067][ T12] mark_lock_irq+0x989/0x9c0 [ 277.493069][ T12] mark_lock+0x1d7/0xa00 [ 277.493071][ T12] mark_usage+0x105/0x170 [ 277.493073][ T12] __lock_acquire+0x378/0xc10 [ 277.493075][ T12] lock_acquire.part.0+0xbc/0x260 [ 277.493076][ T12] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.493078][ T12] ? rcu_is_watching+0x15/0xd0 [ 277.493081][ T12] ? do_raw_read_unlock+0x70/0x70 [ 277.493083][ T12] ? lock_acquire+0x134/0x160 [ 277.493085][ T12] _raw_spin_lock+0x33/0x40 [ 277.493086][ T12] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.493088][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 277.493090][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 277.493092][ T12] ? inet6_dump_ifinfo+0x6e0/0x6e0 [ 277.493094][ T12] ? __ipv6_isatap_ifid+0x210/0x210 [ 277.493096][ T12] ? nlmsg_notify+0x62/0x250 [ 277.493098][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 277.493100][ T12] ? cleanup_prefix_route+0x550/0x550 [ 277.493102][ T12] ? find_held_lock+0x2b/0x80 [ 277.493104][ T12] ? __lock_release.isra.0+0x6b/0x1a0 [ 277.493105][ T12] ? __rwlock_init+0x150/0x150 [ 277.493107][ T12] ? mark_held_locks+0x40/0x70 [ 277.493109][ T12] ? addrconf_ifdown.isra.0+0xa70/0x15f0 [ 277.493110][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 277.493112][ T12] ? __timer_delete_sync+0xdb/0x130 [ 277.493116][ T12] ? addrconf_dad_run+0x1b0/0x1b0 [ 277.493118][ T12] ? netkit_xmit+0x14c0/0x14c0 [ 277.493122][ T12] addrconf_notify+0x2c8/0xf30 [ 277.493123][ T12] ? team_port_get_rtnl+0x65/0xc0 [ 277.493126][ T12] notifier_call_chain+0xb0/0x320 [ 277.493128][ T12] netif_close_many+0x2c9/0x640 [ 277.493130][ T12] ? lock_acquire+0x134/0x160 [ 277.493131][ T12] ? rcu_is_watching+0x15/0xd0 [ 277.493133][ T12] ? rcu_is_watching+0x15/0xd0 [ 277.493134][ T12] ? __dev_close_many+0x670/0x670 [ 277.493136][ T12] ? netif_close_many_and_unlock+0x22/0x2c0 [ 277.493138][ T12] unregister_netdevice_many_notify+0x71a/0x1b30 [ 277.493140][ T12] ? mutex_is_locked+0x1c/0x50 [ 277.493143][ T12] ? unregister_netdevice_queued+0x80/0x80 [ 277.493145][ T12] ? mutex_is_locked+0x1c/0x50 [ 277.493146][ T12] ? rtnl_is_locked+0x15/0x20 [ 277.493148][ T12] ? unregister_netdevice_queue+0x6a/0x470 [ 277.493150][ T12] ? unregister_netdevice_many+0x20/0x20 [ 277.493152][ T12] default_device_exit_batch+0x38b/0x600 [ 277.493154][ T12] ? unregister_netdev+0x60/0x60 [ 277.493155][ T12] ? perf_trace_sched_switch+0x7d0/0x7d0 [ 277.493158][ T12] ? fou_exit_net+0x30/0x110 [ 277.493161][ T12] ops_undo_list+0x2ce/0x8f0 [ 277.493163][ T12] ? lockdep_hardirqs_on+0x8c/0x130 [ 277.493165][ T12] ? netns_install+0x2a0/0x2a0 [ 277.493167][ T12] ? __lock_release.isra.0+0x6b/0x1a0 [ 277.493168][ T12] ? idr_destroy+0x121/0x250 [ 277.493171][ T12] cleanup_net+0x431/0x940 [ 277.493173][ T12] ? net_passive_dec+0x1c0/0x1c0 [ 277.493174][ T12] ? process_one_work+0xdb7/0x1410 [ 277.493176][ T12] ? lock_acquire+0x134/0x160 [ 277.493178][ T12] ? rcu_is_watching+0x15/0xd0 [ 277.493180][ T12] process_one_work+0xdf8/0x1410 [ 277.493183][ T12] ? pwq_dec_nr_in_flight+0x710/0x710 [ 277.493184][ T12] ? lock_acquire.part.0+0xbc/0x260 [ 277.493187][ T12] worker_thread+0x4f1/0xd60 [ 277.493190][ T12] ? rescuer_thread+0x1320/0x1320 [ 277.493192][ T12] kthread+0x367/0x460 [ 277.493193][ T12] ? trace_irq_enable.constprop.0+0x9b/0x180 [ 277.493197][ T12] ? kthread_affine_node+0x330/0x330 [ 277.493198][ T12] ret_from_fork+0x474/0x6b0 [ 277.493200][ T12] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120 [ 277.493202][ T12] ? __switch_to+0x5a3/0xe00 [ 277.493205][ T12] ? kthread_affine_node+0x330/0x330 [ 277.493208][ T12] ret_from_fork_asm+0x11/0x20 [ 277.493212][ T12]