[ 128.068294][ T1378] xdummy0: entered promiscuous mode [ 128.078899][ T1378] xdummy0: left promiscuous mode [ 128.079600][ T1378] [ 128.079691][ T1378] ===================================================== [ 128.079883][ T1378] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 128.080115][ T1378] 6.9.0-rc1-virtme #1 Not tainted [ 128.080272][ T1378] ----------------------------------------------------- [ 128.080473][ T1378] tap/1378 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 128.080668][ T1378] ffff88800592ac28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 128.080953][ T1378] [ 128.080953][ T1378] and this task is already holding: [ 128.081178][ T1378] ffff88802f63f218 (&ul->lock){+.-.}-{2:2}, at: rt6_uncached_list_flush_dev+0x138/0x840 [ 128.081447][ T1378] which would create a new lock dependency: [ 128.081638][ T1378] (&ul->lock){+.-.}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 128.081879][ T1378] [ 128.081879][ T1378] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 128.082145][ T1378] (&ul->lock){+.-.}-{2:2} [ 128.082149][ T1378] [ 128.082149][ T1378] ... which became SOFTIRQ-irq-safe at: [ 128.082527][ T1378] __lock_acquire+0x797/0x1570 [ 128.082681][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.082835][ T1378] _raw_spin_lock_bh+0x38/0x50 [ 128.082992][ T1378] rt6_uncached_list_del+0x77/0x200 [ 128.083146][ T1378] ip6_dst_destroy+0x74/0x1e0 [ 128.083298][ T1378] dst_destroy+0xbc/0x370 [ 128.083452][ T1378] rcu_do_batch+0x3c0/0xfb0 [ 128.083611][ T1378] rcu_core+0x2be/0x500 [ 128.083731][ T1378] __do_softirq+0x1f8/0x5df [ 128.083884][ T1378] irq_exit_rcu+0x97/0xc0 [ 128.084041][ T1378] sysvec_apic_timer_interrupt+0x75/0x80 [ 128.084203][ T1378] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 128.084397][ T1378] default_idle+0xf/0x20 [ 128.084511][ T1378] default_idle_call+0x6d/0xb0 [ 128.084660][ T1378] cpuidle_idle_call+0x1f4/0x280 [ 128.084813][ T1378] do_idle+0xf9/0x160 [ 128.084929][ T1378] cpu_startup_entry+0x54/0x60 [ 128.085079][ T1378] start_secondary+0x21c/0x2b0 [ 128.085236][ T1378] common_startup_64+0x12c/0x138 [ 128.085393][ T1378] [ 128.085393][ T1378] to a SOFTIRQ-irq-unsafe lock: [ 128.085594][ T1378] (&p->alloc_lock){+.+.}-{2:2} [ 128.085598][ T1378] [ 128.085598][ T1378] ... which became SOFTIRQ-irq-unsafe at: [ 128.085998][ T1378] ... [ 128.085999][ T1378] __lock_acquire+0x797/0x1570 [ 128.086232][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.086381][ T1378] _raw_spin_lock+0x30/0x40 [ 128.086531][ T1378] set_mems_allowed+0x1d/0x210 [ 128.086681][ T1378] kernel_init_freeable+0x72/0x310 [ 128.086835][ T1378] kernel_init+0x20/0x200 [ 128.086984][ T1378] ret_from_fork+0x31/0x70 [ 128.087140][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.087289][ T1378] [ 128.087289][ T1378] other info that might help us debug this: [ 128.087289][ T1378] [ 128.087581][ T1378] Possible interrupt unsafe locking scenario: [ 128.087581][ T1378] [ 128.087808][ T1378] CPU0 CPU1 [ 128.087958][ T1378] ---- ---- [ 128.088108][ T1378] lock(&p->alloc_lock); [ 128.088221][ T1378] local_irq_disable(); [ 128.088409][ T1378] lock(&ul->lock); [ 128.088600][ T1378] lock(&p->alloc_lock); [ 128.088793][ T1378] [ 128.088908][ T1378] lock(&ul->lock); [ 128.089022][ T1378] [ 128.089022][ T1378] *** DEADLOCK *** [ 128.089022][ T1378] [ 128.089241][ T1378] 2 locks held by tap/1378: [ 128.089398][ T1378] #0: ffffffff9afb7208 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2af/0xbf0 [ 128.089672][ T1378] #1: ffff88802f63f218 (&ul->lock){+.-.}-{2:2}, at: rt6_uncached_list_flush_dev+0x138/0x840 [ 128.089985][ T1378] [ 128.089985][ T1378] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 128.090284][ T1378] -> (&ul->lock){+.-.}-{2:2} { [ 128.090441][ T1378] HARDIRQ-ON-W at: [ 128.090560][ T1378] __lock_acquire+0x797/0x1570 [ 128.090760][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.090948][ T1378] _raw_spin_lock_bh+0x38/0x50 [ 128.091135][ T1378] rt6_uncached_list_add+0x55/0x1b0 [ 128.091327][ T1378] icmp6_dst_alloc+0x2c0/0x450 [ 128.091521][ T1378] mld_sendpack+0x529/0xbc0 [ 128.091717][ T1378] mld_ifc_work+0x32/0x1f0 [ 128.091911][ T1378] process_one_work+0xe2c/0x1730 [ 128.092105][ T1378] worker_thread+0x587/0xd30 [ 128.092294][ T1378] kthread+0x28a/0x350 [ 128.092447][ T1378] ret_from_fork+0x31/0x70 [ 128.092639][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.092832][ T1378] IN-SOFTIRQ-W at: [ 128.092948][ T1378] __lock_acquire+0x797/0x1570 [ 128.093142][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.093339][ T1378] _raw_spin_lock_bh+0x38/0x50 [ 128.093534][ T1378] rt6_uncached_list_del+0x77/0x200 [ 128.093725][ T1378] ip6_dst_destroy+0x74/0x1e0 [ 128.093911][ T1378] dst_destroy+0xbc/0x370 [ 128.094111][ T1378] rcu_do_batch+0x3c0/0xfb0 [ 128.094304][ T1378] rcu_core+0x2be/0x500 [ 128.094494][ T1378] __do_softirq+0x1f8/0x5df [ 128.094689][ T1378] irq_exit_rcu+0x97/0xc0 [ 128.094882][ T1378] sysvec_apic_timer_interrupt+0x75/0x80 [ 128.095111][ T1378] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 128.095348][ T1378] default_idle+0xf/0x20 [ 128.095542][ T1378] default_idle_call+0x6d/0xb0 [ 128.095743][ T1378] cpuidle_idle_call+0x1f4/0x280 [ 128.095938][ T1378] do_idle+0xf9/0x160 [ 128.096098][ T1378] cpu_startup_entry+0x54/0x60 [ 128.096291][ T1378] start_secondary+0x21c/0x2b0 [ 128.096487][ T1378] common_startup_64+0x12c/0x138 [ 128.096679][ T1378] INITIAL USE at: [ 128.096795][ T1378] __lock_acquire+0x797/0x1570 [ 128.096998][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.097194][ T1378] _raw_spin_lock_bh+0x38/0x50 [ 128.097375][ T1378] rt6_uncached_list_add+0x55/0x1b0 [ 128.097568][ T1378] icmp6_dst_alloc+0x2c0/0x450 [ 128.097755][ T1378] mld_sendpack+0x529/0xbc0 [ 128.097945][ T1378] mld_ifc_work+0x32/0x1f0 [ 128.098140][ T1378] process_one_work+0xe2c/0x1730 [ 128.098340][ T1378] worker_thread+0x587/0xd30 [ 128.098533][ T1378] kthread+0x28a/0x350 [ 128.098683][ T1378] ret_from_fork+0x31/0x70 [ 128.098876][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.099068][ T1378] } [ 128.099148][ T1378] ... key at: [] __key.15+0x0/0x40 [ 128.099464][ T1378] [ 128.099464][ T1378] the dependencies between the lock to be acquired [ 128.099466][ T1378] and SOFTIRQ-irq-unsafe lock: [ 128.099874][ T1378] -> (&p->alloc_lock){+.+.}-{2:2} { [ 128.100127][ T1378] HARDIRQ-ON-W at: [ 128.100245][ T1378] __lock_acquire+0x797/0x1570 [ 128.100437][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.100630][ T1378] _raw_spin_lock+0x30/0x40 [ 128.100916][ T1378] set_mems_allowed+0x1d/0x210 [ 128.101110][ T1378] kernel_init_freeable+0x72/0x310 [ 128.101311][ T1378] kernel_init+0x20/0x200 [ 128.101503][ T1378] ret_from_fork+0x31/0x70 [ 128.101694][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.101887][ T1378] SOFTIRQ-ON-W at: [ 128.102002][ T1378] __lock_acquire+0x797/0x1570 [ 128.102272][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.102563][ T1378] _raw_spin_lock+0x30/0x40 [ 128.102763][ T1378] set_mems_allowed+0x1d/0x210 [ 128.102955][ T1378] kernel_init_freeable+0x72/0x310 [ 128.103150][ T1378] kernel_init+0x20/0x200 [ 128.103345][ T1378] ret_from_fork+0x31/0x70 [ 128.103537][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.103821][ T1378] INITIAL USE at: [ 128.103940][ T1378] __lock_acquire+0x797/0x1570 [ 128.104142][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.104341][ T1378] _raw_spin_lock+0x30/0x40 [ 128.104535][ T1378] set_mems_allowed+0x1d/0x210 [ 128.104736][ T1378] kernel_init_freeable+0x72/0x310 [ 128.105024][ T1378] kernel_init+0x20/0x200 [ 128.105218][ T1378] ret_from_fork+0x31/0x70 [ 128.105418][ T1378] ret_from_fork_asm+0x1a/0x30 [ 128.105614][ T1378] } [ 128.105701][ T1378] ... key at: [] __key.388+0x0/0x40 [ 128.105931][ T1378] ... acquired at: [ 128.106048][ T1378] check_prev_add+0x194/0xce0 [ 128.106198][ T1378] validate_chain+0x71d/0x9b0 [ 128.106357][ T1378] __lock_acquire+0xaf0/0x1570 [ 128.106510][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.106754][ T1378] _raw_spin_lock+0x30/0x40 [ 128.106905][ T1378] __get_task_comm+0x27/0x70 [ 128.107055][ T1378] ref_tracker_alloc+0x2ee/0x490 [ 128.107210][ T1378] rt6_uncached_list_flush_dev+0x494/0x840 [ 128.107495][ T1378] rt6_disable_ip+0xd9/0x140 [ 128.107738][ T1378] addrconf_ifdown.isra.0+0x103/0x1560 [ 128.107895][ T1378] addrconf_notify+0xd1/0xd60 [ 128.108042][ T1378] notifier_call_chain+0xcd/0x150 [ 128.108197][ T1378] dev_close_many+0x2d8/0x650 [ 128.108351][ T1378] unregister_netdevice_many_notify+0x3d5/0x1190 [ 128.108541][ T1378] rtnl_dellink+0x330/0xa30 [ 128.108692][ T1378] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 128.108941][ T1378] netlink_rcv_skb+0x130/0x360 [ 128.109092][ T1378] netlink_unicast+0x449/0x710 [ 128.109243][ T1378] netlink_sendmsg+0x723/0xbe0 [ 128.109394][ T1378] __sys_sendto+0x37d/0x410 [ 128.109549][ T1378] __x64_sys_sendto+0xe0/0x1c0 [ 128.109704][ T1378] do_syscall_64+0xc6/0x1e0 [ 128.109857][ T1378] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 128.110049][ T1378] [ 128.110127][ T1378] [ 128.110127][ T1378] stack backtrace: [ 128.110400][ T1378] CPU: 0 PID: 1378 Comm: tap Not tainted 6.9.0-rc1-virtme #1 [ 128.110628][ T1378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 128.111042][ T1378] Call Trace: [ 128.111168][ T1378] [ 128.111258][ T1378] dump_stack_lvl+0x82/0xd0 [ 128.111419][ T1378] print_bad_irq_dependency+0x957/0xd40 [ 128.111572][ T1378] ? hlock_class+0x4e/0x130 [ 128.111809][ T1378] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 128.112003][ T1378] ? __pfx_usage_skip+0x10/0x10 [ 128.112154][ T1378] ? __bfs+0x246/0x650 [ 128.112269][ T1378] ? __pfx_usage_match+0x10/0x10 [ 128.112502][ T1378] check_irq_usage+0x596/0x850 [ 128.112654][ T1378] ? __pfx_check_irq_usage+0x10/0x10 [ 128.112803][ T1378] ? __bfs+0x246/0x650 [ 128.112916][ T1378] ? __pfx_hlock_conflict+0x10/0x10 [ 128.113068][ T1378] ? check_path.constprop.0+0x24/0x50 [ 128.113317][ T1378] ? check_noncircular+0x14c/0x3e0 [ 128.113473][ T1378] ? __pfx_check_noncircular+0x10/0x10 [ 128.113625][ T1378] ? check_prev_add+0x194/0xce0 [ 128.113871][ T1378] check_prev_add+0x194/0xce0 [ 128.114025][ T1378] ? validate_chain+0x130/0x9b0 [ 128.114178][ T1378] validate_chain+0x71d/0x9b0 [ 128.114332][ T1378] ? mark_lock+0x38/0x3e0 [ 128.114447][ T1378] ? __pfx_validate_chain+0x10/0x10 [ 128.114599][ T1378] ? hlock_class+0x4e/0x130 [ 128.114745][ T1378] ? mark_lock+0x38/0x3e0 [ 128.114864][ T1378] __lock_acquire+0xaf0/0x1570 [ 128.115016][ T1378] lock_acquire.part.0+0xeb/0x330 [ 128.115162][ T1378] ? __get_task_comm+0x27/0x70 [ 128.115408][ T1378] ? mark_lock+0x38/0x3e0 [ 128.115533][ T1378] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 128.115695][ T1378] ? trace_lock_acquire+0x135/0x1c0 [ 128.115845][ T1378] ? __get_task_comm+0x27/0x70 [ 128.116089][ T1378] ? lock_acquire+0x32/0xc0 [ 128.116247][ T1378] ? __get_task_comm+0x27/0x70 [ 128.116404][ T1378] _raw_spin_lock+0x30/0x40 [ 128.116558][ T1378] ? __get_task_comm+0x27/0x70 [ 128.116716][ T1378] __get_task_comm+0x27/0x70 [ 128.116961][ T1378] ref_tracker_alloc+0x2ee/0x490 [ 128.117104][ T1378] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 128.117254][ T1378] ? __lock_release+0x103/0x460 [ 128.117406][ T1378] ? rt6_uncached_list_flush_dev+0x494/0x840 [ 128.117601][ T1378] ? rt6_disable_ip+0xd9/0x140 [ 128.117747][ T1378] ? addrconf_ifdown.isra.0+0x103/0x1560 [ 128.117905][ T1378] ? addrconf_notify+0xd1/0xd60 [ 128.118061][ T1378] ? notifier_call_chain+0xcd/0x150 [ 128.118386][ T1378] ? dev_close_many+0x2d8/0x650 [ 128.118538][ T1378] ? unregister_netdevice_many_notify+0x3d5/0x1190 [ 128.118722][ T1378] ? rtnl_dellink+0x330/0xa30 [ 128.118873][ T1378] ? rtnetlink_rcv_msg+0x2fb/0xbf0 [ 128.119105][ T1378] ? netlink_rcv_skb+0x130/0x360 [ 128.119346][ T1378] ? netlink_unicast+0x449/0x710 [ 128.119500][ T1378] ? netlink_sendmsg+0x723/0xbe0 [ 128.119654][ T1378] ? __sys_sendto+0x37d/0x410 [ 128.119805][ T1378] ? __x64_sys_sendto+0xe0/0x1c0 [ 128.119955][ T1378] ? do_syscall_64+0xc6/0x1e0 [ 128.120192][ T1378] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 128.120377][ T1378] ? in6_dev_get+0xcc/0x210 [ 128.120533][ T1378] rt6_uncached_list_flush_dev+0x494/0x840 [ 128.120730][ T1378] rt6_disable_ip+0xd9/0x140 [ 128.120873][ T1378] ? __pfx_rt6_disable_ip+0x10/0x10 [ 128.121116][ T1378] ? hlock_class+0x4e/0x130 [ 128.121271][ T1378] addrconf_ifdown.isra.0+0x103/0x1560 [ 128.121424][ T1378] ? __pfx_snprintf+0x10/0x10 [ 128.121580][ T1378] ? __try_to_del_timer_sync+0xe7/0x140 [ 128.121734][ T1378] ? __pfx_addrconf_ifdown.isra.0+0x10/0x10 [ 128.122021][ T1378] addrconf_notify+0xd1/0xd60 [ 128.122167][ T1378] notifier_call_chain+0xcd/0x150 [ 128.122322][ T1378] dev_close_many+0x2d8/0x650 [ 128.122473][ T1378] ? notifier_call_chain+0xcd/0x150 [ 128.122701][ T1378] ? __pfx_dev_close_many+0x10/0x10 [ 128.122948][ T1378] ? __netdev_upper_dev_unlink+0x17c/0x220 [ 128.123138][ T1378] unregister_netdevice_many_notify+0x3d5/0x1190 [ 128.123327][ T1378] ? unregister_netdevice_queue+0x70/0x410 [ 128.123517][ T1378] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 128.123712][ T1378] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 128.123907][ T1378] ? netdev_upper_dev_unlink+0x71/0xa0 [ 128.124059][ T1378] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 128.124424][ T1378] rtnl_dellink+0x330/0xa30 [ 128.124575][ T1378] ? hlock_class+0x4e/0x130 [ 128.124726][ T1378] ? __pfx_rtnl_dellink+0x10/0x10 [ 128.124887][ T1378] ? trace_contention_end+0xdc/0x140 [ 128.125133][ T1378] ? __mutex_lock+0x170/0xac0 [ 128.125286][ T1378] ? find_held_lock+0x2c/0x110 [ 128.125446][ T1378] ? __pfx___mutex_lock+0x10/0x10 [ 128.125598][ T1378] ? __pfx___lock_release+0x10/0x10 [ 128.125844][ T1378] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 128.125998][ T1378] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 128.126153][ T1378] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 128.126309][ T1378] ? hlock_class+0x4e/0x130 [ 128.126631][ T1378] ? mark_lock+0x38/0x3e0 [ 128.126750][ T1378] ? __lock_acquire+0xaf0/0x1570 [ 128.126903][ T1378] netlink_rcv_skb+0x130/0x360 [ 128.127058][ T1378] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 128.127212][ T1378] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 128.127443][ T1378] ? lock_acquire.part.0+0xeb/0x330 [ 128.127595][ T1378] ? netlink_deliver_tap+0xc8/0x340 [ 128.127753][ T1378] ? lock_acquire+0x32/0xc0 [ 128.127904][ T1378] ? netlink_deliver_tap+0xc8/0x340 [ 128.128136][ T1378] ? netlink_deliver_tap+0xc8/0x340 [ 128.128285][ T1378] ? netlink_deliver_tap+0x149/0x340 [ 128.128436][ T1378] netlink_unicast+0x449/0x710 [ 128.128588][ T1378] ? __pfx_netlink_unicast+0x10/0x10 [ 128.128821][ T1378] ? netlink_autobind.isra.0+0xa5/0x270 [ 128.128971][ T1378] ? netlink_autobind.isra.0+0x18a/0x270 [ 128.129122][ T1378] netlink_sendmsg+0x723/0xbe0 [ 128.129272][ T1378] ? __pfx_netlink_sendmsg+0x10/0x10 [ 128.129505][ T1378] ? __fget_light+0x53/0x1e0 [ 128.129656][ T1378] __sys_sendto+0x37d/0x410 [ 128.129807][ T1378] ? __pfx___sys_sendto+0x10/0x10 [ 128.129956][ T1378] ? __lock_release+0x103/0x460 [ 128.130108][ T1378] ? __pfx___lock_release+0x10/0x10 [ 128.130347][ T1378] ? fd_install+0x1d1/0x5a0 [ 128.130501][ T1378] ? fd_install+0x1d6/0x5a0 [ 128.130652][ T1378] ? __sys_socket+0x168/0x1e0 [ 128.130803][ T1378] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 128.131074][ T1378] ? __pfx___sys_socket+0x10/0x10 [ 128.131225][ T1378] __x64_sys_sendto+0xe0/0x1c0 [ 128.131376][ T1378] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 128.131569][ T1378] do_syscall_64+0xc6/0x1e0 [ 128.131813][ T1378] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 128.132008][ T1378] RIP: 0033:0x7fdc1042a700 [ 128.132169][ T1378] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20 [ 128.132889][ T1378] RSP: 002b:00007ffcdc838808 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 128.133126][ T1378] RAX: ffffffffffffffda RBX: 0000000000000030 RCX: 00007fdc1042a700 [ 128.133458][ T1378] RDX: 0000000000000030 RSI: 00007ffcdc838810 RDI: 0000000000000005 [ 128.133704][ T1378] RBP: 0000000000404780 R08: 0000000000000000 R09: 0000000000000000 [ 128.133927][ T1378] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 [ 128.134157][ T1378] R13: 00007ffcdc838810 R14: 00000000004063c0 R15: 00000000004064e0 [ 128.134494][ T1378] [ 128.207991][ T1383] xdummy0: entered promiscuous mode [ 128.220695][ T1383] xdummy0: left promiscuous mode [ 128.268846][ T1386] xdummy0: entered promiscuous mode [ 128.279071][ T1386] xdummy0: left promiscuous mode