[ 1127.612567][ T12] [ 1127.612657][ T12] ======================================================== [ 1127.612792][ T12] WARNING: possible irq lock inversion dependency detected [ 1127.612921][ T12] 7.1.0-rc5-virtme #1 Not tainted [ 1127.613010][ T12] -------------------------------------------------------- [ 1127.613149][ T12] kworker/u16:0/12 just changed the state of lock: [ 1127.613256][ T12] ffffffffa67b8eb8 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.613422][ T12] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 1127.613555][ T12] (&ndev->lock){++--}-{3:3} [ 1127.613557][ T12] [ 1127.613557][ T12] [ 1127.613557][ T12] and interrupts could create inverse lock ordering between them. [ 1127.613557][ T12] [ 1127.613882][ T12] [ 1127.613882][ T12] other info that might help us debug this: [ 1127.614013][ T12] Possible interrupt unsafe locking scenario: [ 1127.614013][ T12] [ 1127.614150][ T12] CPU0 CPU1 [ 1127.614238][ T12] ---- ---- [ 1127.614327][ T12] lock(acaddr_hash_lock); [ 1127.614419][ T12] local_irq_disable(); [ 1127.614528][ T12] lock(&ndev->lock); [ 1127.614639][ T12] lock(acaddr_hash_lock); [ 1127.614752][ T12] [ 1127.614821][ T12] lock(&ndev->lock); [ 1127.614891][ T12] [ 1127.614891][ T12] *** DEADLOCK *** [ 1127.614891][ T12] [ 1127.615017][ T12] 4 locks held by kworker/u16:0/12: [ 1127.615110][ T12] #0: ff110000019d9d40 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xd55/0x1410 [ 1127.615291][ T12] #1: ffa00000000c7d10 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xdb7/0x1410 [ 1127.615440][ T12] #2: ffffffffa66922a8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbf/0x890 [ 1127.615593][ T12] #3: ffffffffa66ae080 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x9a/0x600 [ 1127.615761][ T12] [ 1127.615761][ T12] the shortest dependencies between 2nd lock and 1st lock: [ 1127.615913][ T12] -> (&ndev->lock){++--}-{3:3} { [ 1127.616000][ T12] HARDIRQ-ON-W at: [ 1127.616066][ T12] __lock_acquire+0x378/0xc10 [ 1127.616181][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.616289][ T12] _raw_write_lock_bh+0x38/0x50 [ 1127.616404][ T12] addrconf_permanent_addr+0x108/0x9c0 [ 1127.616534][ T12] addrconf_notify+0x151/0xf30 [ 1127.616643][ T12] notifier_call_chain+0xb0/0x320 [ 1127.616749][ T12] __dev_notify_flags+0xde/0x280 [ 1127.616854][ T12] netif_change_flags+0xfe/0x190 [ 1127.616959][ T12] do_setlink.isra.0+0x1cc3/0x2750 [ 1127.617072][ T12] rtnl_newlink+0x8d1/0xef0 [ 1127.617181][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 1127.617290][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 1127.617401][ T12] netlink_unicast+0x486/0x750 [ 1127.617511][ T12] netlink_sendmsg+0x735/0xc60 [ 1127.617621][ T12] ____sys_sendmsg+0x419/0x850 [ 1127.617730][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 1127.617835][ T12] __sys_sendmsg+0x145/0x1f0 [ 1127.617941][ T12] do_syscall_64+0x117/0x590 [ 1127.618098][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.618225][ T12] HARDIRQ-ON-R at: [ 1127.618289][ T12] __lock_acquire+0x378/0xc10 [ 1127.618394][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.618549][ T12] _raw_read_lock_bh+0x44/0x80 [ 1127.618656][ T12] inet6_fill_ifla6_attrs+0x1a72/0x2140 [ 1127.618783][ T12] inet6_fill_link_af+0x5c/0xe0 [ 1127.618938][ T12] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 1127.619065][ T12] rtnl_getlink+0x9c9/0xeb0 [ 1127.619184][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 1127.619333][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 1127.619442][ T12] netlink_unicast+0x486/0x750 [ 1127.619565][ T12] netlink_sendmsg+0x735/0xc60 [ 1127.619721][ T12] ____sys_sendmsg+0x419/0x850 [ 1127.619826][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 1127.619931][ T12] __sys_sendmsg+0x145/0x1f0 [ 1127.620087][ T12] do_syscall_64+0x117/0x590 [ 1127.620195][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.620320][ T12] IN-SOFTIRQ-W at: [ 1127.620386][ T12] __lock_acquire+0x378/0xc10 [ 1127.620539][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.620643][ T12] _raw_write_lock+0x33/0x40 [ 1127.620749][ T12] addrconf_rs_timer+0xb0/0x770 [ 1127.620900][ T12] call_timer_fn+0x163/0x4f0 [ 1127.621005][ T12] __run_timers+0x68f/0xab0 [ 1127.621336][ T12] run_timer_softirq+0xf0/0x160 [ 1127.621488][ T12] handle_softirqs+0x1d8/0x940 [ 1127.621600][ T12] __irq_exit_rcu+0x103/0x1c0 [ 1127.621707][ T12] irq_exit_rcu+0xe/0x30 [ 1127.621859][ T12] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 1127.621985][ T12] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 1127.622114][ T12] pv_native_safe_halt+0xf/0x10 [ 1127.622263][ T12] default_idle+0x9/0x10 [ 1127.622374][ T12] default_idle_call+0x6e/0xb0 [ 1127.622482][ T12] cpuidle_idle_call.constprop.0+0x237/0x410 [ 1127.622660][ T12] do_idle+0xf5/0x160 [ 1127.622766][ T12] cpu_startup_entry+0x53/0x70 [ 1127.622875][ T12] start_secondary+0x204/0x2b0 [ 1127.623025][ T12] common_startup_64+0x13e/0x148 [ 1127.623137][ T12] IN-SOFTIRQ-R at: [ 1127.623199][ T12] __lock_acquire+0x378/0xc10 [ 1127.623308][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.623459][ T12] _raw_read_lock_bh+0x44/0x80 [ 1127.623567][ T12] ipv6_get_lladdr+0xa8/0x3f0 [ 1127.623674][ T12] addrconf_rs_timer+0x251/0x770 [ 1127.623825][ T12] call_timer_fn+0x163/0x4f0 [ 1127.623930][ T12] __run_timers+0x68f/0xab0 [ 1127.624036][ T12] run_timer_softirq+0xf0/0x160 [ 1127.624192][ T12] handle_softirqs+0x1d8/0x940 [ 1127.624297][ T12] __irq_exit_rcu+0x103/0x1c0 [ 1127.624406][ T12] irq_exit_rcu+0xe/0x30 [ 1127.624561][ T12] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 1127.624694][ T12] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 1127.624823][ T12] pv_native_safe_halt+0xf/0x10 [ 1127.624973][ T12] default_idle+0x9/0x10 [ 1127.625087][ T12] default_idle_call+0x6e/0xb0 [ 1127.625197][ T12] cpuidle_idle_call.constprop.0+0x237/0x410 [ 1127.625370][ T12] do_idle+0xf5/0x160 [ 1127.625481][ T12] cpu_startup_entry+0x53/0x70 [ 1127.625586][ T12] start_secondary+0x204/0x2b0 [ 1127.625693][ T12] common_startup_64+0x13e/0x148 [ 1127.625798][ T12] INITIAL USE at: [ 1127.625866][ T12] __lock_acquire+0x378/0xc10 [ 1127.625975][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.626130][ T12] _raw_write_lock_bh+0x38/0x50 [ 1127.626235][ T12] addrconf_permanent_addr+0x108/0x9c0 [ 1127.626366][ T12] addrconf_notify+0x151/0xf30 [ 1127.626520][ T12] notifier_call_chain+0xb0/0x320 [ 1127.626630][ T12] __dev_notify_flags+0xde/0x280 [ 1127.626734][ T12] netif_change_flags+0xfe/0x190 [ 1127.626885][ T12] do_setlink.isra.0+0x1cc3/0x2750 [ 1127.626996][ T12] rtnl_newlink+0x8d1/0xef0 [ 1127.627109][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 1127.627258][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 1127.627367][ T12] netlink_unicast+0x486/0x750 [ 1127.627477][ T12] netlink_sendmsg+0x735/0xc60 [ 1127.627584][ T12] ____sys_sendmsg+0x419/0x850 [ 1127.627737][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 1127.627844][ T12] __sys_sendmsg+0x145/0x1f0 [ 1127.627950][ T12] do_syscall_64+0x117/0x590 [ 1127.628106][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.628237][ T12] INITIAL READ USE at: [ 1127.628327][ T12] __lock_acquire+0x378/0xc10 [ 1127.628483][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.628613][ T12] _raw_read_lock_bh+0x44/0x80 [ 1127.628724][ T12] inet6_fill_ifla6_attrs+0x1a72/0x2140 [ 1127.628897][ T12] inet6_fill_link_af+0x5c/0xe0 [ 1127.629008][ T12] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 1127.629141][ T12] rtnl_getlink+0x9c9/0xeb0 [ 1127.629247][ T12] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 1127.629358][ T12] netlink_rcv_skb+0x14e/0x3a0 [ 1127.629471][ T12] netlink_unicast+0x486/0x750 [ 1127.629627][ T12] netlink_sendmsg+0x735/0xc60 [ 1127.629734][ T12] ____sys_sendmsg+0x419/0x850 [ 1127.629845][ T12] ___sys_sendmsg+0x14e/0x1d0 [ 1127.630002][ T12] __sys_sendmsg+0x145/0x1f0 [ 1127.630120][ T12] do_syscall_64+0x117/0x590 [ 1127.630232][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.630413][ T12] } [ 1127.630460][ T12] ... key at: [] __key.37+0x0/0x40 [ 1127.630605][ T12] ... acquired at: [ 1127.630677][ T12] __lock_acquire+0x508/0xc10 [ 1127.630817][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.630909][ T12] _raw_spin_lock+0x33/0x40 [ 1127.630997][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 1127.631110][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 1127.631241][ T12] addrconf_join_anycast+0x1bc/0x260 [ 1127.631329][ T12] dev_forward_change+0x2be/0x850 [ 1127.631420][ T12] addrconf_fixup_forwarding+0x2af/0x4d0 [ 1127.631535][ T12] addrconf_sysctl_forward+0x209/0x2b0 [ 1127.631668][ T12] proc_sys_call_handler+0x31b/0x480 [ 1127.631758][ T12] new_sync_write+0x333/0x750 [ 1127.631848][ T12] vfs_write+0x6a4/0xc10 [ 1127.631938][ T12] ksys_write+0x116/0x250 [ 1127.632075][ T12] do_syscall_64+0x117/0x590 [ 1127.632163][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.632275][ T12] [ 1127.632319][ T12] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 1127.632456][ T12] HARDIRQ-ON-W at: [ 1127.632523][ T12] __lock_acquire+0x378/0xc10 [ 1127.632638][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.632749][ T12] _raw_spin_lock+0x33/0x40 [ 1127.632906][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 1127.633042][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 1127.633157][ T12] addrconf_join_anycast+0x1bc/0x260 [ 1127.633268][ T12] dev_forward_change+0x2be/0x850 [ 1127.633378][ T12] addrconf_fixup_forwarding+0x2af/0x4d0 [ 1127.633510][ T12] addrconf_sysctl_forward+0x209/0x2b0 [ 1127.633624][ T12] proc_sys_call_handler+0x31b/0x480 [ 1127.633734][ T12] new_sync_write+0x333/0x750 [ 1127.633846][ T12] vfs_write+0x6a4/0xc10 [ 1127.633955][ T12] ksys_write+0x116/0x250 [ 1127.634072][ T12] do_syscall_64+0x117/0x590 [ 1127.634182][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.634317][ T12] SOFTIRQ-ON-W at: [ 1127.634384][ T12] __lock_acquire+0x378/0xc10 [ 1127.634495][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.634604][ T12] _raw_spin_lock+0x33/0x40 [ 1127.634714][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.634824][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 1127.634935][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 1127.635044][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 1127.635157][ T12] addrconf_notify+0x2c8/0xf30 [ 1127.635268][ T12] notifier_call_chain+0xb0/0x320 [ 1127.635380][ T12] netif_close_many+0x2c9/0x640 [ 1127.635493][ T12] unregister_netdevice_many_notify+0x671/0x19a0 [ 1127.635626][ T12] default_device_exit_batch+0x38b/0x600 [ 1127.635759][ T12] ops_undo_list+0x2ce/0x8f0 [ 1127.635870][ T12] cleanup_net+0x431/0x890 [ 1127.635980][ T12] process_one_work+0xdf8/0x1410 [ 1127.636096][ T12] worker_thread+0x4f1/0xd60 [ 1127.636209][ T12] kthread+0x367/0x460 [ 1127.636298][ T12] ret_from_fork+0x474/0x6b0 [ 1127.636410][ T12] ret_from_fork_asm+0x11/0x20 [ 1127.636523][ T12] INITIAL USE at: [ 1127.636589][ T12] __lock_acquire+0x378/0xc10 [ 1127.636700][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.636813][ T12] _raw_spin_lock+0x33/0x40 [ 1127.636923][ T12] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 1127.637053][ T12] __ipv6_dev_ac_inc+0x57e/0x930 [ 1127.637169][ T12] addrconf_join_anycast+0x1bc/0x260 [ 1127.637279][ T12] dev_forward_change+0x2be/0x850 [ 1127.637392][ T12] addrconf_fixup_forwarding+0x2af/0x4d0 [ 1127.637524][ T12] addrconf_sysctl_forward+0x209/0x2b0 [ 1127.637632][ T12] proc_sys_call_handler+0x31b/0x480 [ 1127.637744][ T12] new_sync_write+0x333/0x750 [ 1127.637856][ T12] vfs_write+0x6a4/0xc10 [ 1127.637967][ T12] ksys_write+0x116/0x250 [ 1127.638082][ T12] do_syscall_64+0x117/0x590 [ 1127.638195][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 1127.638329][ T12] } [ 1127.638373][ T12] ... key at: [] acaddr_hash_lock+0x18/0x4520 [ 1127.638508][ T12] ... acquired at: [ 1127.638573][ T12] mark_lock+0x1d7/0xa00 [ 1127.638663][ T12] mark_usage+0x105/0x170 [ 1127.638750][ T12] __lock_acquire+0x378/0xc10 [ 1127.638837][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.638927][ T12] _raw_spin_lock+0x33/0x40 [ 1127.639018][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.639109][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 1127.639197][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 1127.639513][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 1127.639602][ T12] addrconf_notify+0x2c8/0xf30 [ 1127.639692][ T12] notifier_call_chain+0xb0/0x320 [ 1127.639780][ T12] netif_close_many+0x2c9/0x640 [ 1127.639872][ T12] unregister_netdevice_many_notify+0x671/0x19a0 [ 1127.639981][ T12] default_device_exit_batch+0x38b/0x600 [ 1127.640095][ T12] ops_undo_list+0x2ce/0x8f0 [ 1127.640187][ T12] cleanup_net+0x431/0x890 [ 1127.640316][ T12] process_one_work+0xdf8/0x1410 [ 1127.640404][ T12] worker_thread+0x4f1/0xd60 [ 1127.640491][ T12] kthread+0x367/0x460 [ 1127.640557][ T12] ret_from_fork+0x474/0x6b0 [ 1127.640684][ T12] ret_from_fork_asm+0x11/0x20 [ 1127.640772][ T12] [ 1127.640822][ T12] [ 1127.640822][ T12] stack backtrace: [ 1127.640935][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 1127.640938][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1127.640940][ T12] Workqueue: netns cleanup_net [ 1127.640943][ T12] Call Trace: [ 1127.640945][ T12] [ 1127.640946][ T12] dump_stack_lvl+0x6f/0xa0 [ 1127.640950][ T12] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 1127.640953][ T12] mark_lock_irq+0x989/0x9c0 [ 1127.640957][ T12] mark_lock+0x1d7/0xa00 [ 1127.640959][ T12] mark_usage+0x105/0x170 [ 1127.640961][ T12] __lock_acquire+0x378/0xc10 [ 1127.640963][ T12] lock_acquire.part.0+0xbc/0x260 [ 1127.640964][ T12] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.640965][ T12] ? rcu_is_watching+0x15/0xd0 [ 1127.640968][ T12] ? do_raw_read_unlock+0x70/0x70 [ 1127.640970][ T12] ? lock_acquire+0x134/0x160 [ 1127.640971][ T12] _raw_spin_lock+0x33/0x40 [ 1127.640973][ T12] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.640974][ T12] __ipv6_dev_ac_dec+0x236/0x5d0 [ 1127.640976][ T12] addrconf_leave_anycast+0x1bc/0x260 [ 1127.640978][ T12] ? cleanup_prefix_route+0x550/0x550 [ 1127.640979][ T12] ? addrconf_add_mroute+0x1e0/0x1e0 [ 1127.640981][ T12] ? nlmsg_notify+0x62/0x250 [ 1127.640983][ T12] __ipv6_ifa_notify+0x6b4/0xad0 [ 1127.640985][ T12] ? inet6_fill_ifaddr+0xba0/0xba0 [ 1127.640987][ T12] ? find_held_lock+0x2b/0x80 [ 1127.640989][ T12] ? __lock_release.isra.0+0x6b/0x1a0 [ 1127.640991][ T12] ? __rwlock_init+0x150/0x150 [ 1127.640992][ T12] ? mark_held_locks+0x40/0x70 [ 1127.640994][ T12] ? addrconf_ifdown.isra.0+0xa70/0x15f0 [ 1127.640995][ T12] addrconf_ifdown.isra.0+0xa70/0x15f0 [ 1127.640997][ T12] ? __timer_delete_sync+0xdb/0x130 [ 1127.640999][ T12] ? addrconf_dad_run+0x1b0/0x1b0 [ 1127.641001][ T12] ? neigh_flush_one+0x580/0x580 [ 1127.641004][ T12] addrconf_notify+0x2c8/0xf30 [ 1127.641006][ T12] ? fib_netdev_event+0x1a9/0x5d0 [ 1127.641009][ T12] notifier_call_chain+0xb0/0x320 [ 1127.641012][ T12] netif_close_many+0x2c9/0x640 [ 1127.641013][ T12] ? lock_acquire+0x134/0x160 [ 1127.641014][ T12] ? rcu_is_watching+0x15/0xd0 [ 1127.641016][ T12] ? rcu_is_watching+0x15/0xd0 [ 1127.641017][ T12] ? __dev_close_many+0x530/0x530 [ 1127.641019][ T12] ? netif_close_many_and_unlock+0x22/0x2c0 [ 1127.641020][ T12] ? __rtnl_unlock+0x5b/0x100 [ 1127.641023][ T12] unregister_netdevice_many_notify+0x671/0x19a0 [ 1127.641025][ T12] ? mutex_is_locked+0x1c/0x50 [ 1127.641027][ T12] ? unregister_netdevice_queued+0x80/0x80 [ 1127.641029][ T12] ? mutex_is_locked+0x1c/0x50 [ 1127.641030][ T12] ? rtnl_is_locked+0x15/0x20 [ 1127.641032][ T12] ? unregister_netdevice_queue+0x6a/0x470 [ 1127.641034][ T12] ? unregister_netdevice_many+0x20/0x20 [ 1127.641036][ T12] default_device_exit_batch+0x38b/0x600 [ 1127.641038][ T12] ? generic_xdp_install+0x400/0x400 [ 1127.641040][ T12] ? ipmr_free_table+0x12e/0x2a0 [ 1127.641042][ T12] ? unregister_netdev+0x60/0x60 [ 1127.641044][ T12] ? rtnl_is_locked+0x15/0x20 [ 1127.641045][ T12] ? nexthop_net_exit_rtnl+0x1f/0x260 [ 1127.641049][ T12] ops_undo_list+0x2ce/0x8f0 [ 1127.641050][ T12] ? lockdep_hardirqs_on+0x8c/0x130 [ 1127.641052][ T12] ? rtnl_net_dumpid_one+0x2d0/0x2d0 [ 1127.641053][ T12] ? __lock_release.isra.0+0x6b/0x1a0 [ 1127.641055][ T12] ? idr_destroy+0x121/0x250 [ 1127.641058][ T12] cleanup_net+0x431/0x890 [ 1127.641060][ T12] ? net_passive_dec+0x1c0/0x1c0 [ 1127.641061][ T12] ? process_one_work+0xdb7/0x1410 [ 1127.641063][ T12] ? lock_acquire+0x134/0x160 [ 1127.641064][ T12] ? rcu_is_watching+0x15/0xd0 [ 1127.641066][ T12] process_one_work+0xdf8/0x1410 [ 1127.641073][ T12] ? pwq_dec_nr_in_flight+0x710/0x710 [ 1127.641074][ T12] ? lock_acquire.part.0+0xbc/0x260 [ 1127.641077][ T12] worker_thread+0x4f1/0xd60 [ 1127.641079][ T12] ? rescuer_thread+0x1320/0x1320 [ 1127.641081][ T12] kthread+0x367/0x460 [ 1127.641082][ T12] ? trace_irq_enable.constprop.0+0x9b/0x180 [ 1127.641085][ T12] ? kthread_affine_node+0x330/0x330 [ 1127.641087][ T12] ret_from_fork+0x474/0x6b0 [ 1127.641088][ T12] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120 [ 1127.641090][ T12] ? __switch_to+0x5a3/0xe00 [ 1127.641091][ T12] ? kthread_affine_node+0x330/0x330 [ 1127.641093][ T12] ret_from_fork_asm+0x11/0x20 [ 1127.641096][ T12]