[ 340.623187][ T4543] br1: port 1(veth1) entered blocking state [ 340.623566][ T4543] br1: port 1(veth1) entered disabled state [ 340.623935][ T4543] veth1: entered allmulticast mode [ 340.626494][ T4543] veth1: entered promiscuous mode [ 340.675978][ T39] br1: port 1(veth1) entered blocking state [ 340.676279][ T39] br1: port 1(veth1) entered forwarding state [ 367.890853][ T4715] [ 367.890942][ T4715] ======================================================== [ 367.891077][ T4715] WARNING: possible irq lock inversion dependency detected [ 367.891206][ T4715] 7.1.0-rc5-virtme #1 Not tainted [ 367.891297][ T4715] -------------------------------------------------------- [ 367.891422][ T4715] sysctl/4715 just changed the state of lock: [ 367.891535][ T4715] ffffffffb3d7e8b8 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.891688][ T4715] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 367.891825][ T4715] (&ndev->lock){++--}-{3:3} [ 367.891827][ T4715] [ 367.891827][ T4715] [ 367.891827][ T4715] and interrupts could create inverse lock ordering between them. [ 367.891827][ T4715] [ 367.892138][ T4715] [ 367.892138][ T4715] other info that might help us debug this: [ 367.892263][ T4715] Possible interrupt unsafe locking scenario: [ 367.892263][ T4715] [ 367.892395][ T4715] CPU0 CPU1 [ 367.892484][ T4715] ---- ---- [ 367.892567][ T4715] lock(acaddr_hash_lock); [ 367.892654][ T4715] local_irq_disable(); [ 367.892757][ T4715] lock(&ndev->lock); [ 367.892865][ T4715] lock(acaddr_hash_lock); [ 367.892969][ T4715] [ 367.893035][ T4715] lock(&ndev->lock); [ 367.893102][ T4715] [ 367.893102][ T4715] *** DEADLOCK *** [ 367.893102][ T4715] [ 367.893231][ T4715] 2 locks held by sysctl/4715: [ 367.893319][ T4715] #0: ff11000009b6c3e0 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x116/0x250 [ 367.893472][ T4715] #1: ffffffffb3c8c9c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_fixup_forwarding+0x4d/0x4d0 [ 367.893649][ T4715] [ 367.893649][ T4715] the shortest dependencies between 2nd lock and 1st lock: [ 367.893802][ T4715] -> (&ndev->lock){++--}-{3:3} { [ 367.893891][ T4715] HARDIRQ-ON-W at: [ 367.893958][ T4715] __lock_acquire+0x378/0xc10 [ 367.894065][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.894170][ T4715] _raw_write_lock_bh+0x38/0x50 [ 367.894278][ T4715] addrconf_permanent_addr+0x108/0x9c0 [ 367.894409][ T4715] addrconf_notify+0x151/0xf30 [ 367.894525][ T4715] notifier_call_chain+0xb0/0x320 [ 367.894634][ T4715] __dev_notify_flags+0xde/0x280 [ 367.894739][ T4715] netif_change_flags+0xfe/0x190 [ 367.894848][ T4715] do_setlink.isra.0+0x1cc3/0x2750 [ 367.894954][ T4715] rtnl_newlink+0x8d1/0xef0 [ 367.895060][ T4715] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 367.895169][ T4715] netlink_rcv_skb+0x14e/0x3a0 [ 367.895273][ T4715] netlink_unicast+0x486/0x750 [ 367.895375][ T4715] netlink_sendmsg+0x735/0xc60 [ 367.895481][ T4715] ____sys_sendmsg+0x419/0x850 [ 367.895590][ T4715] ___sys_sendmsg+0x14e/0x1d0 [ 367.895698][ T4715] __sys_sendmsg+0x145/0x1f0 [ 367.895816][ T4715] do_syscall_64+0x117/0x590 [ 367.895924][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.896048][ T4715] HARDIRQ-ON-R at: [ 367.896110][ T4715] __lock_acquire+0x378/0xc10 [ 367.896213][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.896317][ T4715] _raw_read_lock_bh+0x44/0x80 [ 367.896420][ T4715] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 367.896548][ T4715] inet6_fill_link_af+0x5c/0xe0 [ 367.896651][ T4715] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 367.896773][ T4715] rtnl_getlink+0x9c9/0xeb0 [ 367.896881][ T4715] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 367.896982][ T4715] netlink_rcv_skb+0x14e/0x3a0 [ 367.897084][ T4715] netlink_unicast+0x486/0x750 [ 367.897186][ T4715] netlink_sendmsg+0x735/0xc60 [ 367.897289][ T4715] ____sys_sendmsg+0x419/0x850 [ 367.897397][ T4715] ___sys_sendmsg+0x14e/0x1d0 [ 367.897504][ T4715] __sys_sendmsg+0x145/0x1f0 [ 367.897607][ T4715] do_syscall_64+0x117/0x590 [ 367.897710][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.897838][ T4715] IN-SOFTIRQ-W at: [ 367.897899][ T4715] __lock_acquire+0x378/0xc10 [ 367.898004][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.898106][ T4715] _raw_write_lock+0x33/0x40 [ 367.898207][ T4715] addrconf_rs_timer+0xb0/0x770 [ 367.898310][ T4715] call_timer_fn+0x163/0x4f0 [ 367.898461][ T4715] __run_timers+0x68f/0xab0 [ 367.898574][ T4715] run_timer_softirq+0xf0/0x160 [ 367.898677][ T4715] handle_softirqs+0x1d8/0x940 [ 367.898830][ T4715] __irq_exit_rcu+0x103/0x1c0 [ 367.898932][ T4715] irq_exit_rcu+0xe/0x30 [ 367.899035][ T4715] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 367.899201][ T4715] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 367.899324][ T4715] pv_native_safe_halt+0xf/0x10 [ 367.899425][ T4715] default_idle+0x9/0x10 [ 367.899586][ T4715] default_idle_call+0x6e/0xb0 [ 367.899693][ T4715] cpuidle_idle_call.constprop.0+0x237/0x410 [ 367.899824][ T4715] do_idle+0xf5/0x160 [ 367.899975][ T4715] cpu_startup_entry+0x53/0x70 [ 367.900078][ T4715] rest_init+0x1f7/0x200 [ 367.900180][ T4715] start_kernel+0x3ad/0x3b0 [ 367.900289][ T4715] x86_64_start_reservations+0x24/0x30 [ 367.900417][ T4715] x86_64_start_kernel+0x12b/0x130 [ 367.900532][ T4715] common_startup_64+0x13e/0x148 [ 367.900690][ T4715] IN-SOFTIRQ-R at: [ 367.900753][ T4715] __lock_acquire+0x378/0xc10 [ 367.900862][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.900965][ T4715] _raw_read_lock_bh+0x44/0x80 [ 367.901113][ T4715] ipv6_get_lladdr+0xa8/0x3f0 [ 367.901224][ T4715] addrconf_rs_timer+0x251/0x770 [ 367.901340][ T4715] call_timer_fn+0x163/0x4f0 [ 367.901447][ T4715] __run_timers+0x68f/0xab0 [ 367.901557][ T4715] run_timer_softirq+0xf0/0x160 [ 367.901662][ T4715] handle_softirqs+0x1d8/0x940 [ 367.901769][ T4715] __irq_exit_rcu+0x103/0x1c0 [ 367.901876][ T4715] irq_exit_rcu+0xe/0x30 [ 367.901983][ T4715] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 367.902109][ T4715] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 367.902235][ T4715] pv_native_safe_halt+0xf/0x10 [ 367.902341][ T4715] default_idle+0x9/0x10 [ 367.902448][ T4715] default_idle_call+0x6e/0xb0 [ 367.902558][ T4715] cpuidle_idle_call.constprop.0+0x237/0x410 [ 367.902681][ T4715] do_idle+0xf5/0x160 [ 367.902839][ T4715] cpu_startup_entry+0x53/0x70 [ 367.902941][ T4715] rest_init+0x1f7/0x200 [ 367.903053][ T4715] start_kernel+0x3ad/0x3b0 [ 367.903204][ T4715] x86_64_start_reservations+0x24/0x30 [ 367.903328][ T4715] x86_64_start_kernel+0x12b/0x130 [ 367.903431][ T4715] common_startup_64+0x13e/0x148 [ 367.903583][ T4715] INITIAL USE at: [ 367.903648][ T4715] __lock_acquire+0x378/0xc10 [ 367.903755][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.903861][ T4715] _raw_write_lock_bh+0x38/0x50 [ 367.904009][ T4715] addrconf_permanent_addr+0x108/0x9c0 [ 367.904133][ T4715] addrconf_notify+0x151/0xf30 [ 367.904237][ T4715] notifier_call_chain+0xb0/0x320 [ 367.904386][ T4715] __dev_notify_flags+0xde/0x280 [ 367.904493][ T4715] netif_change_flags+0xfe/0x190 [ 367.904597][ T4715] do_setlink.isra.0+0x1cc3/0x2750 [ 367.904745][ T4715] rtnl_newlink+0x8d1/0xef0 [ 367.904854][ T4715] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 367.904959][ T4715] netlink_rcv_skb+0x14e/0x3a0 [ 367.905107][ T4715] netlink_unicast+0x486/0x750 [ 367.905211][ T4715] netlink_sendmsg+0x735/0xc60 [ 367.905321][ T4715] ____sys_sendmsg+0x419/0x850 [ 367.905424][ T4715] ___sys_sendmsg+0x14e/0x1d0 [ 367.905580][ T4715] __sys_sendmsg+0x145/0x1f0 [ 367.905683][ T4715] do_syscall_64+0x117/0x590 [ 367.905786][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.905958][ T4715] INITIAL READ USE at: [ 367.906040][ T4715] __lock_acquire+0x378/0xc10 [ 367.906142][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.906310][ T4715] _raw_read_lock_bh+0x44/0x80 [ 367.906413][ T4715] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 367.906542][ T4715] inet6_fill_link_af+0x5c/0xe0 [ 367.906688][ T4715] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 367.906815][ T4715] rtnl_getlink+0x9c9/0xeb0 [ 367.906918][ T4715] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 367.907066][ T4715] netlink_rcv_skb+0x14e/0x3a0 [ 367.907169][ T4715] netlink_unicast+0x486/0x750 [ 367.907272][ T4715] netlink_sendmsg+0x735/0xc60 [ 367.907417][ T4715] ____sys_sendmsg+0x419/0x850 [ 367.907529][ T4715] ___sys_sendmsg+0x14e/0x1d0 [ 367.907632][ T4715] __sys_sendmsg+0x145/0x1f0 [ 367.907778][ T4715] do_syscall_64+0x117/0x590 [ 367.907890][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.908012][ T4715] } [ 367.908058][ T4715] ... key at: [] __key.37+0x0/0x40 [ 367.908224][ T4715] ... acquired at: [ 367.908287][ T4715] __lock_acquire+0x508/0xc10 [ 367.908370][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.908452][ T4715] _raw_spin_lock+0x33/0x40 [ 367.908584][ T4715] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 367.908685][ T4715] __ipv6_dev_ac_inc+0x57e/0x930 [ 367.908767][ T4715] addrconf_join_anycast+0x1bc/0x260 [ 367.908895][ T4715] __ipv6_ifa_notify+0x75b/0xad0 [ 367.908977][ T4715] addrconf_dad_completed+0x14b/0xe10 [ 367.909062][ T4715] addrconf_dad_work+0x3c1/0x930 [ 367.909145][ T4715] process_one_work+0xdf8/0x1410 [ 367.909272][ T4715] worker_thread+0x4f1/0xd60 [ 367.909357][ T4715] kthread+0x367/0x460 [ 367.909419][ T4715] ret_from_fork+0x474/0x6b0 [ 367.909506][ T4715] ret_from_fork_asm+0x11/0x20 [ 367.909594][ T4715] [ 367.909679][ T4715] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 367.909764][ T4715] HARDIRQ-ON-W at: [ 367.909832][ T4715] __lock_acquire+0x378/0xc10 [ 367.909939][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.910086][ T4715] _raw_spin_lock+0x33/0x40 [ 367.910190][ T4715] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 367.910315][ T4715] __ipv6_dev_ac_inc+0x57e/0x930 [ 367.910463][ T4715] addrconf_join_anycast+0x1bc/0x260 [ 367.910576][ T4715] __ipv6_ifa_notify+0x75b/0xad0 [ 367.910686][ T4715] addrconf_dad_completed+0x14b/0xe10 [ 367.910838][ T4715] addrconf_dad_work+0x3c1/0x930 [ 367.910942][ T4715] process_one_work+0xdf8/0x1410 [ 367.911044][ T4715] worker_thread+0x4f1/0xd60 [ 367.911191][ T4715] kthread+0x367/0x460 [ 367.911276][ T4715] ret_from_fork+0x474/0x6b0 [ 367.911381][ T4715] ret_from_fork_asm+0x11/0x20 [ 367.911488][ T4715] SOFTIRQ-ON-W at: [ 367.911594][ T4715] __lock_acquire+0x378/0xc10 [ 367.911697][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.911803][ T4715] _raw_spin_lock+0x33/0x40 [ 367.911950][ T4715] __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.912055][ T4715] addrconf_leave_anycast+0x1bc/0x260 [ 367.912158][ T4715] dev_forward_change+0x3b3/0x850 [ 367.912265][ T4715] addrconf_fixup_forwarding+0x2af/0x4d0 [ 367.912435][ T4715] addrconf_sysctl_forward+0x209/0x2b0 [ 367.912544][ T4715] proc_sys_call_handler+0x31b/0x480 [ 367.912651][ T4715] new_sync_write+0x333/0x750 [ 367.912804][ T4715] vfs_write+0x6a4/0xc10 [ 367.912908][ T4715] ksys_write+0x116/0x250 [ 367.913010][ T4715] do_syscall_64+0x117/0x590 [ 367.913159][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.913284][ T4715] INITIAL USE at: [ 367.913348][ T4715] __lock_acquire+0x378/0xc10 [ 367.913498][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.913602][ T4715] _raw_spin_lock+0x33/0x40 [ 367.913704][ T4715] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 367.913874][ T4715] __ipv6_dev_ac_inc+0x57e/0x930 [ 367.913979][ T4715] addrconf_join_anycast+0x1bc/0x260 [ 367.914082][ T4715] __ipv6_ifa_notify+0x75b/0xad0 [ 367.914225][ T4715] addrconf_dad_completed+0x14b/0xe10 [ 367.914328][ T4715] addrconf_dad_work+0x3c1/0x930 [ 367.914432][ T4715] process_one_work+0xdf8/0x1410 [ 367.914541][ T4715] worker_thread+0x4f1/0xd60 [ 367.914688][ T4715] kthread+0x367/0x460 [ 367.914770][ T4715] ret_from_fork+0x474/0x6b0 [ 367.914878][ T4715] ret_from_fork_asm+0x11/0x20 [ 367.915026][ T4715] } [ 367.915068][ T4715] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 367.915190][ T4715] ... acquired at: [ 367.915254][ T4715] mark_lock+0x1d7/0xa00 [ 367.915380][ T4715] mark_usage+0x105/0x170 [ 367.915463][ T4715] __lock_acquire+0x378/0xc10 [ 367.915548][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.915631][ T4715] _raw_spin_lock+0x33/0x40 [ 367.915759][ T4715] __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.915846][ T4715] addrconf_leave_anycast+0x1bc/0x260 [ 367.915931][ T4715] dev_forward_change+0x3b3/0x850 [ 367.916013][ T4715] addrconf_fixup_forwarding+0x2af/0x4d0 [ 367.916160][ T4715] addrconf_sysctl_forward+0x209/0x2b0 [ 367.916244][ T4715] proc_sys_call_handler+0x31b/0x480 [ 367.916327][ T4715] new_sync_write+0x333/0x750 [ 367.916411][ T4715] vfs_write+0x6a4/0xc10 [ 367.916544][ T4715] ksys_write+0x116/0x250 [ 367.916630][ T4715] do_syscall_64+0x117/0x590 [ 367.916714][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.916822][ T4715] [ 367.916910][ T4715] [ 367.916910][ T4715] stack backtrace: [ 367.917015][ T4715] CPU: 0 UID: 0 PID: 4715 Comm: sysctl Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 367.917018][ T4715] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 367.917020][ T4715] Call Trace: [ 367.917022][ T4715] [ 367.917023][ T4715] dump_stack_lvl+0x6f/0xa0 [ 367.917027][ T4715] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 367.917030][ T4715] mark_lock_irq+0x989/0x9c0 [ 367.917033][ T4715] mark_lock+0x1d7/0xa00 [ 367.917035][ T4715] mark_usage+0x105/0x170 [ 367.917036][ T4715] __lock_acquire+0x378/0xc10 [ 367.917039][ T4715] lock_acquire.part.0+0xbc/0x260 [ 367.917040][ T4715] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.917042][ T4715] ? rcu_is_watching+0x15/0xd0 [ 367.917045][ T4715] ? do_raw_read_unlock+0x70/0x70 [ 367.917047][ T4715] ? lock_acquire+0x134/0x160 [ 367.917049][ T4715] _raw_spin_lock+0x33/0x40 [ 367.917050][ T4715] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.917052][ T4715] __ipv6_dev_ac_dec+0x236/0x5d0 [ 367.917054][ T4715] addrconf_leave_anycast+0x1bc/0x260 [ 367.917055][ T4715] ? find_held_lock+0x2b/0x80 [ 367.917059][ T4715] ? __ipv6_isatap_ifid+0x210/0x210 [ 367.917060][ T4715] ? mark_held_locks+0x40/0x70 [ 367.917062][ T4715] ? lockdep_hardirqs_on+0x8c/0x130 [ 367.917064][ T4715] dev_forward_change+0x3b3/0x850 [ 367.917066][ T4715] ? addrconf_fixup_forwarding+0x4d/0x4d0 [ 367.917068][ T4715] ? addrconf_sysctl_proxy_ndp+0x2f0/0x2f0 [ 367.917071][ T4715] addrconf_fixup_forwarding+0x2af/0x4d0 [ 367.917074][ T4715] addrconf_sysctl_forward+0x209/0x2b0 [ 367.917076][ T4715] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 367.917078][ T4715] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 367.917080][ T4715] ? __kvmalloc_node_noprof+0x305/0x8a0 [ 367.917083][ T4715] ? proc_sys_call_handler+0x25d/0x480 [ 367.917086][ T4715] proc_sys_call_handler+0x31b/0x480 [ 367.917088][ T4715] ? proc_sys_lookup+0x3d0/0x3d0 [ 367.917090][ T4715] ? do_fault_around+0x300/0x5a0 [ 367.917093][ T4715] ? find_held_lock+0x2b/0x80 [ 367.917095][ T4715] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 367.917097][ T4715] ? rcu_read_lock_any_held+0x3c/0x90 [ 367.917099][ T4715] ? proc_sys_call_handler+0x480/0x480 [ 367.917101][ T4715] new_sync_write+0x333/0x750 [ 367.917102][ T4715] ? __lock_acquire+0x508/0xc10 [ 367.917104][ T4715] ? new_sync_read+0x740/0x740 [ 367.917106][ T4715] ? lock_acquire.part.0+0xbc/0x260 [ 367.917107][ T4715] ? ksys_write+0x116/0x250 [ 367.917109][ T4715] vfs_write+0x6a4/0xc10 [ 367.917111][ T4715] ksys_write+0x116/0x250 [ 367.917113][ T4715] ? __ia32_sys_read+0xc0/0xc0 [ 367.917114][ T4715] ? rcu_is_watching+0x15/0xd0 [ 367.917116][ T4715] ? rcu_is_watching+0x15/0xd0 [ 367.917118][ T4715] do_syscall_64+0x117/0x590 [ 367.917119][ T4715] ? trace_hardirqs_off+0xd/0x30 [ 367.917122][ T4715] ? exc_page_fault+0xee/0x100 [ 367.917124][ T4715] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 367.917125][ T4715] RIP: 0033:0x7fcaa9cc308e [ 367.917128][ T4715] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 367.917130][ T4715] RSP: 002b:00007ffe4d0b15d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 367.917133][ T4715] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fcaa9cc308e [ 367.917134][ T4715] RDX: 0000000000000002 RSI: 000055699bb604b0 RDI: 0000000000000005 [ 367.917135][ T4715] RBP: 00007ffe4d0b15e0 R08: 0000000000000000 R09: 0000000000000000 [ 367.917136][ T4715] R10: 0000000000000000 R11: 0000000000000202 R12: 000055699bb625e0 [ 367.917137][ T4715] R13: 000055699bb60470 R14: 0000000000000002 R15: 0000000000000000 [ 367.917139][ T4715] [ 368.104785][ T4726] br1: port 1(veth1) entered disabled state [ 368.120523][ T4727] veth1: left allmulticast mode [ 368.120632][ T4727] veth1: left promiscuous mode [ 368.120780][ T4727] br1: port 1(veth1) entered disabled state