[ 10.758034][ T250] ip (250) used greatest stack depth: 23248 bytes left [ 12.592857][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 14.578853][ T314] br1: port 1(veth1) entered blocking state [ 14.579338][ T314] br1: port 1(veth1) entered disabled state [ 14.580316][ T314] veth1: entered allmulticast mode [ 14.582348][ T314] veth1: entered promiscuous mode [ 14.666182][ T39] br1: port 1(veth1) entered blocking state [ 14.666626][ T39] br1: port 1(veth1) entered forwarding state [ 32.268696][ T453] br1: port 1(veth1) entered disabled state [ 32.362381][ T454] veth1: left allmulticast mode [ 32.362671][ T454] veth1: left promiscuous mode [ 32.363016][ T454] br1: port 1(veth1) entered disabled state [ 33.629563][ T467] [ 33.629738][ T467] ============================================ [ 33.629926][ T467] WARNING: possible recursive locking detected [ 33.630123][ T467] 6.13.0-rc5-virtme #1 Not tainted [ 33.630280][ T467] -------------------------------------------- [ 33.630464][ T467] ip/467 is trying to acquire lock: [ 33.630616][ T467] ffffffff8f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.630930][ T467] [ 33.630930][ T467] but task is already holding lock: [ 33.631152][ T467] ffffffff8f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.631463][ T467] [ 33.631463][ T467] other info that might help us debug this: [ 33.631683][ T467] Possible unsafe locking scenario: [ 33.631683][ T467] [ 33.631898][ T467] CPU0 [ 33.632012][ T467] ---- [ 33.632124][ T467] lock((netdev_chain).rwsem); [ 33.632273][ T467] lock((netdev_chain).rwsem); [ 33.632421][ T467] [ 33.632421][ T467] *** DEADLOCK *** [ 33.632421][ T467] [ 33.632722][ T467] May be due to missing lock nesting notation [ 33.632722][ T467] [ 33.633072][ T467] 2 locks held by ip/467: [ 33.633194][ T467] #0: ffffffff8f3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 33.633466][ T467] #1: ffffffff8f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.633772][ T467] [ 33.633772][ T467] stack backtrace: [ 33.633954][ T467] CPU: 0 UID: 0 PID: 467 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 33.634184][ T467] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 33.634370][ T467] Call Trace: [ 33.634484][ T467] [ 33.634571][ T467] dump_stack_lvl+0x82/0xd0 [ 33.634816][ T467] print_deadlock_bug+0x40a/0x650 [ 33.634972][ T467] validate_chain+0x5bf/0xae0 [ 33.635123][ T467] ? __pfx_validate_chain+0x10/0x10 [ 33.635281][ T467] ? hlock_class+0x4e/0x130 [ 33.635429][ T467] ? mark_lock+0x38/0x3e0 [ 33.635555][ T467] __lock_acquire+0xb9a/0x1680 [ 33.635706][ T467] lock_acquire.part.0+0xeb/0x330 [ 33.635856][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.636039][ T467] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 33.636225][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.636374][ T467] ? trace_lock_acquire+0x14c/0x1f0 [ 33.636538][ T467] ? lock_acquire+0x32/0xc0 [ 33.636687][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.636873][ T467] down_read+0x9f/0x340 [ 33.636990][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.637178][ T467] ? __pfx_down_read+0x10/0x10 [ 33.637326][ T467] ? __lock_release+0x103/0x460 [ 33.637473][ T467] ? netconsole_netdev_event+0x2c1/0x620 [ 33.637635][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.637822][ T467] blocking_notifier_call_chain+0x50/0x90 [ 33.638050][ T467] __netdev_upper_dev_unlink+0xd9/0x220 [ 33.638279][ T467] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 33.638563][ T467] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 33.638800][ T467] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 33.639051][ T467] ? rtnl_is_locked+0x15/0x20 [ 33.639269][ T467] netdev_upper_dev_unlink+0x71/0xa0 [ 33.639509][ T467] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 33.639796][ T467] ? netconsole_netdev_event+0x2c1/0x620 [ 33.640025][ T467] ? mutex_is_locked+0x1c/0x60 [ 33.640245][ T467] ? rtnl_is_locked+0x15/0x20 [ 33.640473][ T467] ? netdev_master_upper_dev_get+0x13/0x120 [ 33.640751][ T467] vrf_device_event+0x78/0xe0 [vrf] [ 33.640979][ T467] notifier_call_chain+0xcd/0x150 [ 33.641209][ T467] blocking_notifier_call_chain+0x66/0x90 [ 33.641425][ T467] unregister_netdevice_many_notify+0xa7b/0x1580 [ 33.641611][ T467] ? __lock_release+0x103/0x460 [ 33.641780][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.641976][ T467] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 33.642246][ T467] ? hlock_class+0x4e/0x130 [ 33.642401][ T467] ? mark_held_locks+0x9e/0xe0 [ 33.642550][ T467] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 33.642720][ T467] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 33.642907][ T467] rtnl_dellink+0x348/0xa40 [ 33.643059][ T467] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.643223][ T467] ? find_held_lock+0x2c/0x110 [ 33.643391][ T467] ? __lock_release+0x103/0x460 [ 33.643542][ T467] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.643698][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.643864][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.644086][ T467] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.644236][ T467] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.644386][ T467] rtnetlink_rcv_msg+0x712/0xc10 [ 33.644545][ T467] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.644699][ T467] ? hlock_class+0x4e/0x130 [ 33.644850][ T467] ? mark_lock+0x38/0x3e0 [ 33.644963][ T467] ? __lock_acquire+0xb9a/0x1680 [ 33.645115][ T467] netlink_rcv_skb+0x130/0x360 [ 33.645268][ T467] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.645417][ T467] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 33.645574][ T467] ? netlink_deliver_tap+0x13e/0x340 [ 33.645753][ T467] ? netlink_deliver_tap+0xc3/0x340 [ 33.645906][ T467] netlink_unicast+0x44b/0x710 [ 33.646056][ T467] ? __pfx_netlink_unicast+0x10/0x10 [ 33.646203][ T467] ? find_held_lock+0x2c/0x110 [ 33.646356][ T467] netlink_sendmsg+0x723/0xbe0 [ 33.646503][ T467] ? __pfx_netlink_sendmsg+0x10/0x10 [ 33.646659][ T467] ____sys_sendmsg+0x7ac/0xa10 [ 33.646815][ T467] ? __pfx_____sys_sendmsg+0x10/0x10 [ 33.646964][ T467] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 33.647150][ T467] ___sys_sendmsg+0xee/0x170 [ 33.647302][ T467] ? __pfx____sys_sendmsg+0x10/0x10 [ 33.647449][ T467] ? kasan_save_stack+0x34/0x50 [ 33.647598][ T467] ? kasan_save_stack+0x24/0x50 [ 33.647754][ T467] ? __kasan_record_aux_stack+0x8e/0xa0 [ 33.647912][ T467] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 33.648097][ T467] ? __x64_sys_close+0x7c/0xd0 [ 33.648246][ T467] ? do_syscall_64+0xc1/0x1d0 [ 33.648393][ T467] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.648577][ T467] ? __lock_acquire+0xb9a/0x1680 [ 33.648738][ T467] ? find_held_lock+0x2c/0x110 [ 33.648888][ T467] ? __lock_release+0x103/0x460 [ 33.649038][ T467] ? __virt_addr_valid+0x22b/0x430 [ 33.649188][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.649335][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.649485][ T467] __sys_sendmsg+0x109/0x1a0 [ 33.649632][ T467] ? __pfx___sys_sendmsg+0x10/0x10 [ 33.649841][ T467] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 33.650044][ T467] do_syscall_64+0xc1/0x1d0 [ 33.650214][ T467] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.650401][ T467] RIP: 0033:0x7f56d1c669a7 [ 33.650561][ T467] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 33.651094][ T467] RSP: 002b:00007ffe87870848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.651327][ T467] RAX: ffffffffffffffda RBX: 00007ffe87870f70 RCX: 00007f56d1c669a7 [ 33.651551][ T467] RDX: 0000000000000000 RSI: 00007ffe878708b0 RDI: 0000000000000005 [ 33.651782][ T467] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 33.652008][ T467] R10: 00007f56d1b24ef8 R11: 0000000000000246 R12: 0000000000000002 [ 33.652236][ T467] R13: 0000000067795821 R14: 0000000000498600 R15: 0000000000000000 [ 33.652465][ T467]