[ 10.984681][ T215] ns3br1: port 1(ns3eth1) entered blocking state [ 10.984749][ T215] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 10.984752][ T215] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 215, name: ip [ 10.984753][ T215] preempt_count: 1, expected: 0 [ 10.984754][ T215] RCU nest depth: 0, expected: 0 [ 10.984755][ T215] locks held by ip/215: 5, last CPU#0: [ 10.984758][ T215] #0: ffffffff9d6e3740 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x9a8/0x11c0 [ 10.984769][ T215] #1: ffffffff9cf79cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 10.984776][ T215] #2: ffffffff9cf79d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 10.984779][ T215] #3: ffffffff9ce99660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 10.984783][ T215] #4: ffffffff9ce99560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 10.984787][ T215] irq event stamp: 16338 [ 10.984788][ T215] hardirqs last enabled at (16337): [] __down_trylock_console_sem+0x86/0xa0 [ 10.984790][ T215] hardirqs last disabled at (16338): [] console_emit_next_record+0x3d4/0x4c0 [ 10.984792][ T215] softirqs last enabled at (16266): [] addrconf_permanent_addr+0x2b1/0x9c0 [ 10.984796][ T215] softirqs last disabled at (16264): [] addrconf_permanent_addr+0x108/0x9c0 [ 10.984799][ T215] Preemption disabled at: [ 10.984799][ T215] [] vprintk_emit+0x31b/0x3e0 [ 10.984805][ T215] CPU: 0 UID: 0 PID: 215 Comm: ip Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 10.984808][ T215] Tainted: [W]=WARN [ 10.984809][ T215] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.984811][ T215] Call Trace: [ 10.984812][ T215] [ 10.984814][ T215] dump_stack_lvl+0x6f/0xa0 [ 10.984820][ T215] ? vprintk_emit+0x31b/0x3e0 [ 10.984822][ T215] __might_resched.cold+0x1fe/0x2c1 [ 10.984826][ T215] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 10.984830][ T215] ? __kmalloc_noprof+0xdb/0x760 [ 10.984835][ T215] __kmalloc_noprof+0x443/0x760 [ 10.984838][ T215] ? alloc_buf.isra.0+0x4b/0x260 [ 10.984843][ T215] ? do_raw_spin_unlock+0x59/0x250 [ 10.984846][ T215] alloc_buf.isra.0+0x4b/0x260 [ 10.984849][ T215] put_chars+0x1e1/0x2f0 [ 10.984852][ T215] ? __send_to_port+0x420/0x420 [ 10.984854][ T215] ? check_prev_add+0x316/0xe90 [ 10.984858][ T215] ? validate_chain+0x34a/0xc20 [ 10.984862][ T215] hvc_console_print+0x292/0x780 [ 10.984865][ T215] ? mark_usage+0x61/0x170 [ 10.984866][ T215] ? __lock_acquire+0x518/0xc20 [ 10.984868][ T215] ? __lock_acquire+0x518/0xc20 [ 10.984872][ T215] ? hvc_write+0x3a0/0x3a0 [ 10.984874][ T215] ? lock_acquire.part.0+0xd4/0x280 [ 10.984878][ T215] ? lock_acquire+0x13c/0x160 [ 10.984882][ T215] console_emit_next_record+0x22f/0x4c0 [ 10.984885][ T215] ? devkmsg_read+0x4b0/0x4b0 [ 10.984887][ T215] ? console_flush_one_record+0x106/0x710 [ 10.984890][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.984894][ T215] ? lock_acquire+0x13c/0x160 [ 10.984898][ T215] console_flush_one_record+0x46f/0x710 [ 10.984902][ T215] ? console_emit_next_record+0x4c0/0x4c0 [ 10.984904][ T215] ? __lock_acquire+0x518/0xc20 [ 10.984909][ T215] console_unlock+0xee/0x1f0 [ 10.984912][ T215] ? console_flush_one_record+0x710/0x710 [ 10.984913][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.984916][ T215] ? lock_acquire+0x60/0x160 [ 10.984919][ T215] ? __down_trylock_console_sem+0x5e/0xa0 [ 10.984921][ T215] ? vprintk_emit+0x320/0x3e0 [ 10.984927][ T215] vprintk_emit+0x37c/0x3e0 [ 10.984930][ T215] ? wake_up_klogd_work_func+0x90/0x90 [ 10.984932][ T215] ? __lock_release.isra.0+0x69/0x1a0 [ 10.984934][ T215] ? _raw_spin_unlock_irqrestore+0x40/0x80 [ 10.984938][ T215] ? mark_held_locks+0x40/0x70 [ 10.984941][ T215] _printk+0xc7/0x100 [ 10.984944][ T215] ? snapshot_read.cold+0x21/0x21 [ 10.984948][ T215] ? br_multicast_flood+0x960/0x960 [ 10.984950][ T215] ? do_setlink.isra.0+0xa31/0x2750 [ 10.984951][ T215] ? rtnl_newlink+0x9f1/0x11c0 [ 10.984953][ T215] ? rtnetlink_rcv_msg+0x6fd/0xbd0 [ 10.984957][ T215] br_set_state+0x22f/0x410 [ 10.984960][ T215] br_init_port+0xc4/0x200 [ 10.984964][ T215] new_nbp+0x39c/0x580 [ 10.984967][ T215] br_add_if+0x212/0x1360 [ 10.984970][ T215] ? kernel_text_address+0x149/0x170 [ 10.984973][ T215] ? __kernel_text_address+0x12/0x30 [ 10.984976][ T215] do_set_master+0x357/0x580 [ 10.984978][ T215] ? netif_change_flags+0xfe/0x190 [ 10.984982][ T215] do_setlink.isra.0+0xa31/0x2750 [ 10.984985][ T215] ? stack_trace_save+0x93/0xc0 [ 10.984988][ T215] ? rtnl_link_get_size+0x350/0x350 [ 10.984989][ T215] ? rcu_read_lock_any_held+0x66/0x90 [ 10.984991][ T215] ? stack_depot_save_flags+0x38e/0x790 [ 10.984995][ T215] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 10.984998][ T215] ? rcu_read_lock_any_held+0x3c/0x90 [ 10.985000][ T215] ? validate_chain+0x38b/0xc20 [ 10.985002][ T215] ? kasan_save_stack+0x3d/0x50 [ 10.985005][ T215] ? kasan_save_stack+0x2f/0x50 [ 10.985007][ T215] ? kasan_save_track+0x14/0x30 [ 10.985009][ T215] ? __lock_acquire+0x518/0xc20 [ 10.985011][ T215] ? __netlink_deliver_tap+0x24e/0x9b0 [ 10.985015][ T215] ? ___sys_sendmsg+0x70/0x1d0 [ 10.985020][ T215] ? lock_acquire.part.0+0xd4/0x280 [ 10.985021][ T215] ? rtnl_newlink+0x9a8/0x11c0 [ 10.985024][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.985026][ T215] ? lock_acquire+0x13c/0x160 [ 10.985028][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.985030][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.985032][ T215] ? trace_contention_end+0xb3/0x180 [ 10.985036][ T215] ? __mutex_lock+0x1db/0x1ea0 [ 10.985038][ T215] ? __mutex_lock+0x9a3/0x1ea0 [ 10.985041][ T215] ? rtnl_newlink+0x9a8/0x11c0 [ 10.985044][ T215] ? ww_mutex_lock+0x160/0x160 [ 10.985046][ T215] ? nla_get_range_signed+0x3d0/0x3d0 [ 10.985051][ T215] ? __rtnl_newlink+0x3fa/0xa50 [ 10.985056][ T215] rtnl_newlink+0x9f1/0x11c0 [ 10.985061][ T215] ? rtnl_bridge_getlink+0x850/0x850 [ 10.985063][ T215] ? __lock_acquire+0x518/0xc20 [ 10.985067][ T215] ? lock_acquire.part.0+0xd4/0x280 [ 10.985069][ T215] ? find_held_lock+0x2b/0x80 [ 10.985071][ T215] ? rtnl_bridge_getlink+0x850/0x850 [ 10.985073][ T215] ? __lock_release.isra.0+0x69/0x1a0 [ 10.985076][ T215] ? rtnl_bridge_getlink+0x850/0x850 [ 10.985079][ T215] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 10.985082][ T215] ? rtnl_link_fill+0x920/0x920 [ 10.985083][ T215] ? __lock_acquire+0x518/0xc20 [ 10.985088][ T215] ? lock_acquire.part.0+0xd4/0x280 [ 10.985090][ T215] ? find_held_lock+0x2b/0x80 [ 10.985093][ T215] netlink_rcv_skb+0x14e/0x3a0 [ 10.985096][ T215] ? rtnl_link_fill+0x920/0x920 [ 10.985099][ T215] ? netlink_ack+0xcf0/0xcf0 [ 10.985105][ T215] ? netlink_deliver_tap+0xc5/0x330 [ 10.985107][ T215] ? netlink_deliver_tap+0x13c/0x330 [ 10.985111][ T215] netlink_unicast+0x486/0x750 [ 10.985115][ T215] ? netlink_attachskb+0x810/0x810 [ 10.985118][ T215] ? __lock_acquire+0x518/0xc20 [ 10.985122][ T215] netlink_sendmsg+0x735/0xc60 [ 10.985126][ T215] ? netlink_unicast+0x750/0x750 [ 10.985130][ T215] ? __might_fault+0x97/0x140 [ 10.985135][ T215] ____sys_sendmsg+0x415/0x880 [ 10.985137][ T215] ? copy_msghdr_from_user+0x279/0x420 [ 10.985140][ T215] ? get_timestamp.constprop.0+0x390/0x390 [ 10.985141][ T215] ? move_addr_to_kernel+0x40/0x40 [ 10.985149][ T215] ___sys_sendmsg+0x14e/0x1d0 [ 10.985151][ T215] ? copy_msghdr_from_user+0x420/0x420 [ 10.985166][ T215] __sys_sendmsg+0x12c/0x1d0 [ 10.985169][ T215] ? __sys_sendmsg_sock+0x20/0x20 [ 10.985175][ T215] ? rcu_is_watching+0x16/0xd0 [ 10.985179][ T215] do_syscall_64+0xff/0x530 [ 10.985182][ T215] ? exc_page_fault+0xee/0x100 [ 10.985185][ T215] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 10.985187][ T215] RIP: 0033:0x7f077847954e [ 10.985190][ T215] Code: 4d 89 d8 e8 b4 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 [ 10.985192][ T215] RSP: 002b:00007ffce67233f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 10.985195][ T215] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f077847954e [ 10.985196][ T215] RDX: 0000000000000000 RSI: 00007ffce67234a0 RDI: 0000000000000005 [ 10.985197][ T215] RBP: 00007ffce6723400 R08: 0000000000000000 R09: 0000000000000000 [ 10.985198][ T215] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a90f4d5 [ 10.985199][ T215] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffce6723b70 [ 10.985205][ T215] [ 11.017918][ T215] ns3br1: port 1(ns3eth1) entered disabled state [ 11.018209][ T215] ns3eth1: entered allmulticast mode [ 11.019715][ T215] ns3eth1: entered promiscuous mode [ 11.021323][ T36] ns3br1: port 1(ns3eth1) entered blocking state [ 11.021714][ T36] ns3br1: port 1(ns3eth1) entered forwarding state [ 11.040877][ T215] ip (215) used greatest stack depth: 23336 bytes left [ 11.067703][ T216] ns3br1: port 2(ns3eth2) entered blocking state [ 11.067978][ T216] ns3br1: port 2(ns3eth2) entered disabled state [ 11.068254][ T216] ns3eth2: entered allmulticast mode [ 11.069247][ T216] ns3eth2: entered promiscuous mode [ 11.095693][ T217] ns3br1: port 3(ns3eth3) entered blocking state [ 11.095962][ T217] ns3br1: port 3(ns3eth3) entered disabled state [ 11.096232][ T217] ns3eth3: entered allmulticast mode [ 11.097171][ T217] ns3eth3: entered promiscuous mode [ 11.123343][ T39] ns3br1: port 2(ns3eth2) entered blocking state [ 11.123612][ T39] ns3br1: port 2(ns3eth2) entered forwarding state [ 11.167571][ T39] ns3br1: port 3(ns3eth3) entered blocking state [ 11.167839][ T39] ns3br1: port 3(ns3eth3) entered forwarding state [ 11.516566][ T231] ns1eth1: entered promiscuous mode [ 11.517434][ T231] ns1eth2: entered promiscuous mode [ 11.545636][ T232] ns2eth1: entered promiscuous mode [ 11.546354][ T232] ns2eth2: entered promiscuous mode [ 11.546931][ T232] ns2eth3: entered promiscuous mode [ 24.613731][ T12] ns1eth1: left promiscuous mode [ 24.613779][ T12] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 24.613782][ T12] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 12, name: kworker/u16:0 [ 24.613783][ T12] preempt_count: 1, expected: 0 [ 24.613784][ T12] RCU nest depth: 0, expected: 0 [ 24.613785][ T12] locks held by kworker/u16:0/12: 8, last CPU#3: [ 24.613787][ T12] #0: ff11000001a09d40 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0xd9a/0x1560 [ 24.613799][ T12] #1: ffa00000000c7d10 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xdfc/0x1560 [ 24.613803][ T12] #2: ffffffff9d6c7a88 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbf/0x890 [ 24.613808][ T12] #3: ffffffff9d6e3740 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x9a/0x600 [ 24.613812][ T12] #4: ffffffff9cf79cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 24.613817][ T12] #5: ffffffff9cf79d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 24.613820][ T12] #6: ffffffff9ce99660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 24.613824][ T12] #7: ffffffff9ce99560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 24.613827][ T12] irq event stamp: 19104 [ 24.613828][ T12] hardirqs last enabled at (19103): [] __down_trylock_console_sem+0x86/0xa0 [ 24.613831][ T12] hardirqs last disabled at (19104): [] console_emit_next_record+0x3d4/0x4c0 [ 24.613833][ T12] softirqs last enabled at (18976): [] tcp_close+0x2b/0xb0 [ 24.613836][ T12] softirqs last disabled at (18974): [] release_sock+0x21/0x240 [ 24.613840][ T12] Preemption disabled at: [ 24.613840][ T12] [] vprintk_emit+0x31b/0x3e0 [ 24.613846][ T12] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 24.613849][ T12] Tainted: [W]=WARN [ 24.613850][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.613852][ T12] Workqueue: netns cleanup_net [ 24.613855][ T12] Call Trace: [ 24.613857][ T12] [ 24.613858][ T12] dump_stack_lvl+0x6f/0xa0 [ 24.613864][ T12] ? vprintk_emit+0x31b/0x3e0 [ 24.613866][ T12] __might_resched.cold+0x1fe/0x2c1 [ 24.613871][ T12] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 24.613875][ T12] ? __kmalloc_noprof+0xdb/0x760 [ 24.613880][ T12] __kmalloc_noprof+0x443/0x760 [ 24.613882][ T12] ? alloc_buf.isra.0+0x4b/0x260 [ 24.613888][ T12] ? do_raw_spin_unlock+0x59/0x250 [ 24.613891][ T12] alloc_buf.isra.0+0x4b/0x260 [ 24.613894][ T12] put_chars+0x1e1/0x2f0 [ 24.613896][ T12] ? check_prev_add+0xef/0xe90 [ 24.613899][ T12] ? __send_to_port+0x420/0x420 [ 24.613902][ T12] ? validate_chain+0x34a/0xc20 [ 24.613907][ T12] hvc_console_print+0x292/0x780 [ 24.613914][ T12] ? hvc_write+0x3a0/0x3a0 [ 24.613916][ T12] ? rcu_is_watching+0x16/0xd0 [ 24.613921][ T12] ? lock_acquire+0x13c/0x160 [ 24.613925][ T12] console_emit_next_record+0x22f/0x4c0 [ 24.613929][ T12] ? devkmsg_read+0x4b0/0x4b0 [ 24.613930][ T12] ? console_flush_one_record+0x106/0x710 [ 24.613934][ T12] ? rcu_is_watching+0x16/0xd0 [ 24.613936][ T12] ? lock_acquire+0x13c/0x160 [ 24.613940][ T12] console_flush_one_record+0x46f/0x710 [ 24.613944][ T12] ? console_emit_next_record+0x4c0/0x4c0 [ 24.613946][ T12] ? __lock_acquire+0x518/0xc20 [ 24.613951][ T12] console_unlock+0xee/0x1f0 [ 24.613954][ T12] ? console_flush_one_record+0x710/0x710 [ 24.613956][ T12] ? rcu_is_watching+0x16/0xd0 [ 24.613958][ T12] ? lock_acquire+0x60/0x160 [ 24.613962][ T12] ? __down_trylock_console_sem+0x5e/0xa0 [ 24.613964][ T12] ? vprintk_emit+0x320/0x3e0 [ 24.613967][ T12] vprintk_emit+0x37c/0x3e0 [ 24.613971][ T12] ? wake_up_klogd_work_func+0x90/0x90 [ 24.613974][ T12] ? lockdep_hardirqs_on_prepare.part.0+0x9a/0x160 [ 24.613975][ T12] ? lockdep_hardirqs_on+0x91/0x130 [ 24.613979][ T12] ? finish_task_switch.isra.0+0x209/0xa70 [ 24.613980][ T12] ? finish_task_switch.isra.0+0x209/0xa70 [ 24.613984][ T12] _printk+0xc7/0x100 [ 24.613988][ T12] ? snapshot_read.cold+0x21/0x21 [ 24.613991][ T12] ? synchronize_rcu_expedited+0x440/0x510 [ 24.613993][ T12] ? netdev_name+0x43/0x60 [ 24.613997][ T12] ? __netdev_printk+0x17f/0x1d0 [ 24.614000][ T12] netdev_info+0xe2/0x116 [ 24.614003][ T12] ? netdev_notice+0x120/0x120 [ 24.614006][ T12] ? synchronize_rcu_expedited+0x440/0x510 [ 24.614008][ T12] ? netif_set_mtu_ext+0x5f0/0x5f0 [ 24.614010][ T12] ? synchronize_rcu_normal+0x340/0x340 [ 24.614014][ T12] ? mutex_is_locked+0x1c/0x50 [ 24.614017][ T12] __dev_set_promiscuity.cold+0x95/0x104 [ 24.614020][ T12] ? sync_rcu_exp_select_cpus+0x700/0x700 [ 24.614023][ T12] netif_set_promiscuity+0x4c/0xc0 [ 24.614028][ T12] dev_set_promiscuity+0x9d/0x150 [ 24.614031][ T12] hsr_del_port+0x39d/0x540 [ 24.614036][ T12] hsr_del_ports+0x24/0x80 [ 24.614039][ T12] hsr_dellink+0x5d/0x90 [ 24.614041][ T12] default_device_exit_batch+0x19d/0x600 [ 24.614045][ T12] ? unregister_netdevice_queue+0x470/0x470 [ 24.614047][ T12] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 24.614050][ T12] ? mutex_is_locked+0x1c/0x50 [ 24.614054][ T12] ops_undo_list+0x2ce/0x8f0 [ 24.614058][ T12] ? lockdep_hardirqs_on+0x91/0x130 [ 24.614060][ T12] ? rtnl_net_dumpid_one+0x2d0/0x2d0 [ 24.614061][ T12] ? __lock_release.isra.0+0x69/0x1a0 [ 24.614064][ T12] ? idr_destroy+0x121/0x250 [ 24.614069][ T12] cleanup_net+0x431/0x890 [ 24.614072][ T12] ? net_passive_dec+0x230/0x230 [ 24.614076][ T12] ? lock_acquire+0x13c/0x160 [ 24.614078][ T12] ? rcu_is_watching+0x16/0xd0 [ 24.614082][ T12] process_one_work+0xe3e/0x1560 [ 24.614092][ T12] ? __queue_delayed_work+0x470/0x470 [ 24.614095][ T12] ? lock_acquire.part.0+0xd4/0x280 [ 24.614102][ T12] worker_thread+0x4f1/0xd60 [ 24.614109][ T12] ? rescuer_thread+0x1340/0x1340 [ 24.614111][ T12] kthread+0x367/0x460 [ 24.614114][ T12] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 24.614117][ T12] ? kthread_affine_preferred+0x4c0/0x4c0 [ 24.614120][ T12] ret_from_fork+0x474/0x6b0 [ 24.614124][ T12] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120 [ 24.614127][ T12] ? __switch_to+0x5a3/0xe00 [ 24.614131][ T12] ? kthread_affine_preferred+0x4c0/0x4c0 [ 24.614133][ T12] ret_from_fork_asm+0x11/0x20 [ 24.614142][ T12] [ 24.641133][ T12] ns1eth2: left promiscuous mode [ 24.653490][ T12] ns2eth2 (unregistering): left promiscuous mode [ 24.661480][ T12] ns2eth1 (unregistering): left promiscuous mode [ 24.757979][ T12] ns2eth3: left promiscuous mode [ 24.760807][ T12] ns3br1: port 1(ns3eth1) entered disabled state [ 24.766788][ T12] ns3eth1 (unregistering): left allmulticast mode [ 24.767117][ T12] ns3eth1 (unregistering): left promiscuous mode [ 24.767422][ T12] ns3br1: port 1(ns3eth1) entered disabled state [ 24.876650][ T12] ns3eth3: left allmulticast mode [ 24.876921][ T12] ns3eth3: left promiscuous mode [ 24.877279][ T12] ns3br1: port 3(ns3eth3) entered disabled state [ 24.878562][ T12] ns3eth2: left allmulticast mode [ 24.878803][ T12] ns3eth2: left promiscuous mode [ 24.879136][ T12] ns3br1: port 2(ns3eth2) entered disabled state