[ 11.048232][ T248] ip (248) used greatest stack depth: 23848 bytes left [ 12.832239][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 15.330145][ T321] ip (321) used greatest stack depth: 23368 bytes left [ 15.958971][ T331] br1: port 1(veth1.100) entered blocking state [ 15.959900][ T331] br1: port 1(veth1.100) entered disabled state [ 15.960345][ T331] veth1.100: entered allmulticast mode [ 15.960551][ T331] veth1: entered allmulticast mode [ 15.962569][ T331] veth1.100: entered promiscuous mode [ 15.962783][ T331] veth1: entered promiscuous mode [ 16.184084][ T334] br1: port 1(veth1.100) entered blocking state [ 16.184491][ T334] br1: port 1(veth1.100) entered forwarding state [ 16.733235][ T344] br2: port 1(veth1.200) entered blocking state [ 16.733624][ T344] br2: port 1(veth1.200) entered disabled state [ 16.733907][ T344] veth1.200: entered allmulticast mode [ 16.735800][ T344] veth1.200: entered promiscuous mode [ 16.965918][ T347] br2: port 1(veth1.200) entered blocking state [ 16.966200][ T347] br2: port 1(veth1.200) entered forwarding state [ 28.324359][ T409] veth1.100: left allmulticast mode [ 28.324627][ T409] veth1.100: left promiscuous mode [ 28.325137][ T409] br1: port 1(veth1.100) entered disabled state [ 28.405202][ T410] veth1.200: left allmulticast mode [ 28.405536][ T410] veth1: left allmulticast mode [ 28.405872][ T410] veth1.200: left promiscuous mode [ 28.406146][ T410] veth1: left promiscuous mode [ 28.406945][ T410] br2: port 1(veth1.200) entered disabled state [ 30.556607][ T412] br2: port 1(veth1.200) entered blocking state [ 30.556942][ T412] br2: port 1(veth1.200) entered disabled state [ 30.557207][ T412] veth1.200: entered allmulticast mode [ 30.557394][ T412] veth1: entered allmulticast mode [ 30.559313][ T412] veth1.200: entered promiscuous mode [ 30.559511][ T412] veth1: entered promiscuous mode [ 30.560504][ T412] br2: port 1(veth1.200) entered blocking state [ 30.560754][ T412] br2: port 1(veth1.200) entered forwarding state [ 30.651339][ T413] br1: port 1(veth1.100) entered blocking state [ 30.651763][ T413] br1: port 1(veth1.100) entered disabled state [ 30.652167][ T413] veth1.100: entered allmulticast mode [ 30.655769][ T413] veth1.100: entered promiscuous mode [ 30.657841][ T413] br1: port 1(veth1.100) entered blocking state [ 30.658339][ T413] br1: port 1(veth1.100) entered forwarding state [ 36.513567][ T465] veth1.200: left allmulticast mode [ 36.513908][ T465] veth1.200: left promiscuous mode [ 36.516076][ T465] br2: port 1(veth1.200) entered disabled state [ 37.044507][ T472] veth1.100: left allmulticast mode [ 37.044730][ T472] veth1: left allmulticast mode [ 37.044921][ T472] veth1.100: left promiscuous mode [ 37.045096][ T472] veth1: left promiscuous mode [ 37.045616][ T472] br1: port 1(veth1.100) entered disabled state [ 39.004262][ T493] [ 39.004453][ T493] ============================================ [ 39.004759][ T493] WARNING: possible recursive locking detected [ 39.005071][ T493] 6.13.0-rc5-virtme #1 Not tainted [ 39.005310][ T493] -------------------------------------------- [ 39.005616][ T493] ip/493 is trying to acquire lock: [ 39.005825][ T493] ffffffff933d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 39.006180][ T493] [ 39.006180][ T493] but task is already holding lock: [ 39.006531][ T493] ffffffff933d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 39.007071][ T493] [ 39.007071][ T493] other info that might help us debug this: [ 39.007399][ T493] Possible unsafe locking scenario: [ 39.007399][ T493] [ 39.007729][ T493] CPU0 [ 39.007899][ T493] ---- [ 39.008071][ T493] lock((netdev_chain).rwsem); [ 39.008321][ T493] lock((netdev_chain).rwsem); [ 39.008574][ T493] [ 39.008574][ T493] *** DEADLOCK *** [ 39.008574][ T493] [ 39.008925][ T493] May be due to missing lock nesting notation [ 39.008925][ T493] [ 39.009273][ T493] 2 locks held by ip/493: [ 39.009451][ T493] #0: ffffffff933e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 39.009869][ T493] #1: ffffffff933d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 39.010337][ T493] [ 39.010337][ T493] stack backtrace: [ 39.010616][ T493] CPU: 2 UID: 0 PID: 493 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 39.010966][ T493] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 39.011255][ T493] Call Trace: [ 39.011431][ T493] [ 39.011548][ T493] dump_stack_lvl+0x82/0xd0 [ 39.011791][ T493] print_deadlock_bug+0x40a/0x650 [ 39.012026][ T493] validate_chain+0x5bf/0xae0 [ 39.012258][ T493] ? __pfx_validate_chain+0x10/0x10 [ 39.012501][ T493] ? hlock_class+0x4e/0x130 [ 39.012738][ T493] ? mark_lock+0x38/0x3e0 [ 39.012923][ T493] __lock_acquire+0xb9a/0x1680 [ 39.013161][ T493] lock_acquire.part.0+0xeb/0x330 [ 39.013400][ T493] ? blocking_notifier_call_chain+0x50/0x90 [ 39.013692][ T493] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 39.013974][ T493] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.014205][ T493] ? trace_lock_acquire+0x14c/0x1f0 [ 39.014439][ T493] ? lock_acquire+0x32/0xc0 [ 39.014668][ T493] ? blocking_notifier_call_chain+0x50/0x90 [ 39.014965][ T493] down_read+0x9f/0x340 [ 39.015142][ T493] ? blocking_notifier_call_chain+0x50/0x90 [ 39.015428][ T493] ? __pfx_down_read+0x10/0x10 [ 39.015657][ T493] ? __lock_release+0x103/0x460 [ 39.015880][ T493] ? netconsole_netdev_event+0x2c1/0x620 [ 39.016114][ T493] ? __pfx___lock_release+0x10/0x10 [ 39.016347][ T493] blocking_notifier_call_chain+0x50/0x90 [ 39.016584][ T493] __netdev_upper_dev_unlink+0xd9/0x220 [ 39.016814][ T493] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 39.017101][ T493] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 39.017327][ T493] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 39.017617][ T493] ? rtnl_is_locked+0x15/0x20 [ 39.017851][ T493] netdev_upper_dev_unlink+0x71/0xa0 [ 39.018083][ T493] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 39.018374][ T493] ? netconsole_netdev_event+0x2c1/0x620 [ 39.018602][ T493] ? mutex_is_locked+0x1c/0x60 [ 39.018833][ T493] ? rtnl_is_locked+0x15/0x20 [ 39.019062][ T493] ? netdev_master_upper_dev_get+0x13/0x120 [ 39.019348][ T493] vrf_device_event+0x78/0xe0 [vrf] [ 39.019584][ T493] notifier_call_chain+0xcd/0x150 [ 39.019809][ T493] blocking_notifier_call_chain+0x66/0x90 [ 39.020052][ T493] unregister_netdevice_many_notify+0xa7b/0x1580 [ 39.020337][ T493] ? hlock_class+0x4e/0x130 [ 39.020565][ T493] ? mark_lock+0x38/0x3e0 [ 39.020746][ T493] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 39.021036][ T493] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 39.021318][ T493] ? kfree+0xf3/0x330 [ 39.021504][ T493] ? vlan_vid_del+0x310/0x5e0 [ 39.021739][ T493] ? vlan_vid_del+0x310/0x5e0 [ 39.021973][ T493] rtnl_dellink+0x348/0xa40 [ 39.022207][ T493] ? __pfx_rtnl_dellink+0x10/0x10 [ 39.022466][ T493] ? find_held_lock+0x2c/0x110 [ 39.022697][ T493] ? __lock_release+0x103/0x460 [ 39.022924][ T493] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 39.023150][ T493] ? __pfx___lock_release+0x10/0x10 [ 39.023393][ T493] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.023625][ T493] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 39.023855][ T493] ? __pfx_rtnl_dellink+0x10/0x10 [ 39.024080][ T493] rtnetlink_rcv_msg+0x712/0xc10 [ 39.024308][ T493] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 39.024519][ T493] ? hlock_class+0x4e/0x130 [ 39.024747][ T493] ? mark_lock+0x38/0x3e0 [ 39.024922][ T493] ? __lock_acquire+0xb9a/0x1680 [ 39.025154][ T493] netlink_rcv_skb+0x130/0x360 [ 39.025380][ T493] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 39.025618][ T493] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 39.025860][ T493] ? netlink_deliver_tap+0x13e/0x340 [ 39.026094][ T493] ? netlink_deliver_tap+0xc3/0x340 [ 39.026331][ T493] netlink_unicast+0x44b/0x710 [ 39.026577][ T493] ? __pfx_netlink_unicast+0x10/0x10 [ 39.026807][ T493] ? find_held_lock+0x2c/0x110 [ 39.027027][ T493] netlink_sendmsg+0x723/0xbe0 [ 39.027252][ T493] ? __pfx_netlink_sendmsg+0x10/0x10 [ 39.027493][ T493] ____sys_sendmsg+0x7ac/0xa10 [ 39.027712][ T493] ? __pfx_____sys_sendmsg+0x10/0x10 [ 39.027928][ T493] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 39.028212][ T493] ___sys_sendmsg+0xee/0x170 [ 39.028442][ T493] ? __pfx____sys_sendmsg+0x10/0x10 [ 39.028664][ T493] ? kasan_save_stack+0x34/0x50 [ 39.028892][ T493] ? kasan_save_stack+0x24/0x50 [ 39.029109][ T493] ? __kasan_record_aux_stack+0x8e/0xa0 [ 39.029338][ T493] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 39.029615][ T493] ? __x64_sys_close+0x7c/0xd0 [ 39.029832][ T493] ? do_syscall_64+0xc1/0x1d0 [ 39.030061][ T493] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.030341][ T493] ? __lock_acquire+0xb9a/0x1680 [ 39.030570][ T493] ? find_held_lock+0x2c/0x110 [ 39.030790][ T493] ? __lock_release+0x103/0x460 [ 39.031003][ T493] ? __virt_addr_valid+0x22b/0x430 [ 39.031220][ T493] ? __pfx___lock_release+0x10/0x10 [ 39.031446][ T493] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.031673][ T493] __sys_sendmsg+0x109/0x1a0 [ 39.031894][ T493] ? __pfx___sys_sendmsg+0x10/0x10 [ 39.032112][ T493] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 39.032400][ T493] do_syscall_64+0xc1/0x1d0 [ 39.032621][ T493] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.032900][ T493] RIP: 0033:0x7fbc1732a9a7 [ 39.033126][ T493] 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 [ 39.033917][ T493] RSP: 002b:00007ffd614e9258 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 39.034264][ T493] RAX: ffffffffffffffda RBX: 00007ffd614e9980 RCX: 00007fbc1732a9a7 [ 39.034611][ T493] RDX: 0000000000000000 RSI: 00007ffd614e92c0 RDI: 0000000000000005 [ 39.034965][ T493] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 39.035307][ T493] R10: 00007fbc171e8ef8 R11: 0000000000000246 R12: 0000000000000002 [ 39.035649][ T493] R13: 0000000067795467 R14: 0000000000498600 R15: 0000000000000000 [ 39.035979][ T493]