[ 11.169175][ T250] ip (250) used greatest stack depth: 23248 bytes left [ 13.333830][ T290] 8021q: 802.1Q VLAN Support v1.8 [ 15.358197][ T313] br0: port 1(veth1) entered blocking state [ 15.358786][ T313] br0: port 1(veth1) entered disabled state [ 15.359250][ T313] veth1: entered allmulticast mode [ 15.362236][ T313] veth1: entered promiscuous mode [ 15.459555][ T315] br0: port 2(veth2) entered blocking state [ 15.459892][ T315] br0: port 2(veth2) entered disabled state [ 15.460191][ T315] veth2: entered allmulticast mode [ 15.462155][ T315] veth2: entered promiscuous mode [ 15.671906][ T45] br0: port 1(veth1) entered blocking state [ 15.672313][ T45] br0: port 1(veth1) entered forwarding state [ 15.757416][ T45] br0: port 2(veth2) entered blocking state [ 15.757765][ T45] br0: port 2(veth2) entered forwarding state [ 46.614582][ T407] br0: port 2(veth2) entered disabled state [ 46.710488][ T408] br0: port 1(veth1) entered disabled state [ 46.817075][ T409] veth2: left allmulticast mode [ 46.817518][ T409] veth2: left promiscuous mode [ 46.817938][ T409] br0: port 2(veth2) entered disabled state [ 46.820239][ T409] veth1: left allmulticast mode [ 46.821228][ T409] veth1: left promiscuous mode [ 46.821610][ T409] br0: port 1(veth1) entered disabled state [ 47.016326][ T410] [ 47.016498][ T410] ============================================ [ 47.016733][ T410] WARNING: possible recursive locking detected [ 47.016927][ T410] 6.13.0-rc5-virtme #1 Not tainted [ 47.017090][ T410] -------------------------------------------- [ 47.017291][ T410] ip/410 is trying to acquire lock: [ 47.017441][ T410] ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 47.017757][ T410] [ 47.017757][ T410] but task is already holding lock: [ 47.017970][ T410] ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 47.018263][ T410] [ 47.018263][ T410] other info that might help us debug this: [ 47.018482][ T410] Possible unsafe locking scenario: [ 47.018482][ T410] [ 47.018703][ T410] CPU0 [ 47.018814][ T410] ---- [ 47.018924][ T410] lock((netdev_chain).rwsem); [ 47.019094][ T410] lock((netdev_chain).rwsem); [ 47.019239][ T410] [ 47.019239][ T410] *** DEADLOCK *** [ 47.019239][ T410] [ 47.019471][ T410] May be due to missing lock nesting notation [ 47.019471][ T410] [ 47.019693][ T410] 2 locks held by ip/410: [ 47.019805][ T410] #0: ffffffffadbe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 47.020076][ T410] #1: ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 47.020373][ T410] [ 47.020373][ T410] stack backtrace: [ 47.020558][ T410] CPU: 2 UID: 0 PID: 410 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 47.020814][ T410] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 47.021022][ T410] Call Trace: [ 47.021153][ T410] [ 47.021235][ T410] dump_stack_lvl+0x82/0xd0 [ 47.021391][ T410] print_deadlock_bug+0x40a/0x650 [ 47.021540][ T410] validate_chain+0x5bf/0xae0 [ 47.021707][ T410] ? __pfx_validate_chain+0x10/0x10 [ 47.021855][ T410] ? hlock_class+0x4e/0x130 [ 47.022000][ T410] ? mark_lock+0x38/0x3e0 [ 47.022116][ T410] __lock_acquire+0xb9a/0x1680 [ 47.022267][ T410] lock_acquire.part.0+0xeb/0x330 [ 47.022434][ T410] ? blocking_notifier_call_chain+0x50/0x90 [ 47.022645][ T410] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 47.022855][ T410] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 47.023022][ T410] ? trace_lock_acquire+0x14c/0x1f0 [ 47.023171][ T410] ? lock_acquire+0x32/0xc0 [ 47.023318][ T410] ? blocking_notifier_call_chain+0x50/0x90 [ 47.023500][ T410] down_read+0x9f/0x340 [ 47.023618][ T410] ? blocking_notifier_call_chain+0x50/0x90 [ 47.023812][ T410] ? __pfx_down_read+0x10/0x10 [ 47.023981][ T410] ? __lock_release+0x103/0x460 [ 47.024129][ T410] ? netconsole_netdev_event+0x2c1/0x620 [ 47.024275][ T410] ? __pfx___lock_release+0x10/0x10 [ 47.024421][ T410] blocking_notifier_call_chain+0x50/0x90 [ 47.024567][ T410] __netdev_upper_dev_unlink+0xd9/0x220 [ 47.024728][ T410] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 47.024914][ T410] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 47.025066][ T410] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 47.025247][ T410] ? rtnl_is_locked+0x15/0x20 [ 47.025398][ T410] netdev_upper_dev_unlink+0x71/0xa0 [ 47.025544][ T410] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 47.025724][ T410] ? netconsole_netdev_event+0x2c1/0x620 [ 47.025873][ T410] ? mutex_is_locked+0x1c/0x60 [ 47.026021][ T410] ? rtnl_is_locked+0x15/0x20 [ 47.026172][ T410] ? netdev_master_upper_dev_get+0x13/0x120 [ 47.026356][ T410] vrf_device_event+0x78/0xe0 [vrf] [ 47.026508][ T410] notifier_call_chain+0xcd/0x150 [ 47.026655][ T410] blocking_notifier_call_chain+0x66/0x90 [ 47.026804][ T410] unregister_netdevice_many_notify+0xa7b/0x1580 [ 47.026985][ T410] ? __lock_release+0x103/0x460 [ 47.027130][ T410] ? __pfx___lock_release+0x10/0x10 [ 47.027286][ T410] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 47.027469][ T410] ? hlock_class+0x4e/0x130 [ 47.027620][ T410] ? mark_held_locks+0x9e/0xe0 [ 47.027768][ T410] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 47.027916][ T410] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 47.028132][ T410] rtnl_dellink+0x348/0xa40 [ 47.028295][ T410] ? __pfx_rtnl_dellink+0x10/0x10 [ 47.028470][ T410] ? find_held_lock+0x2c/0x110 [ 47.028623][ T410] ? __lock_release+0x103/0x460 [ 47.028786][ T410] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 47.028939][ T410] ? __pfx___lock_release+0x10/0x10 [ 47.029097][ T410] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 47.029259][ T410] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 47.029427][ T410] ? __pfx_rtnl_dellink+0x10/0x10 [ 47.029606][ T410] rtnetlink_rcv_msg+0x712/0xc10 [ 47.029754][ T410] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 47.029906][ T410] ? hlock_class+0x4e/0x130 [ 47.030051][ T410] ? mark_lock+0x38/0x3e0 [ 47.030175][ T410] ? __lock_acquire+0xb9a/0x1680 [ 47.030321][ T410] netlink_rcv_skb+0x130/0x360 [ 47.030471][ T410] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 47.030637][ T410] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 47.030791][ T410] ? netlink_deliver_tap+0x13e/0x340 [ 47.030941][ T410] ? netlink_deliver_tap+0xc3/0x340 [ 47.031117][ T410] netlink_unicast+0x44b/0x710 [ 47.031268][ T410] ? __pfx_netlink_unicast+0x10/0x10 [ 47.031425][ T410] ? find_held_lock+0x2c/0x110 [ 47.031575][ T410] netlink_sendmsg+0x723/0xbe0 [ 47.031753][ T410] ? __pfx_netlink_sendmsg+0x10/0x10 [ 47.031903][ T410] ____sys_sendmsg+0x7ac/0xa10 [ 47.032050][ T410] ? __pfx_____sys_sendmsg+0x10/0x10 [ 47.032198][ T410] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 47.032385][ T410] ___sys_sendmsg+0xee/0x170 [ 47.032534][ T410] ? __pfx____sys_sendmsg+0x10/0x10 [ 47.032695][ T410] ? kasan_save_stack+0x34/0x50 [ 47.032852][ T410] ? kasan_save_stack+0x24/0x50 [ 47.033012][ T410] ? __kasan_record_aux_stack+0x8e/0xa0 [ 47.033163][ T410] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 47.033359][ T410] ? __x64_sys_close+0x7c/0xd0 [ 47.033510][ T410] ? do_syscall_64+0xc1/0x1d0 [ 47.033669][ T410] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 47.033861][ T410] ? __lock_acquire+0xb9a/0x1680 [ 47.034019][ T410] ? find_held_lock+0x2c/0x110 [ 47.034168][ T410] ? __lock_release+0x103/0x460 [ 47.034316][ T410] ? __virt_addr_valid+0x22b/0x430 [ 47.034471][ T410] ? __pfx___lock_release+0x10/0x10 [ 47.034622][ T410] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 47.034782][ T410] __sys_sendmsg+0x109/0x1a0 [ 47.034931][ T410] ? __pfx___sys_sendmsg+0x10/0x10 [ 47.035087][ T410] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 47.035276][ T410] do_syscall_64+0xc1/0x1d0 [ 47.035429][ T410] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 47.035625][ T410] RIP: 0033:0x7fae348749a7 [ 47.035792][ T410] 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 [ 47.036315][ T410] RSP: 002b:00007ffc721a1268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 47.036541][ T410] RAX: ffffffffffffffda RBX: 00007ffc721a1990 RCX: 00007fae348749a7 [ 47.036762][ T410] RDX: 0000000000000000 RSI: 00007ffc721a12d0 RDI: 0000000000000005 [ 47.037013][ T410] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 47.037255][ T410] R10: 00007fae34732ef8 R11: 0000000000000246 R12: 0000000000000002 [ 47.037480][ T410] R13: 0000000067795417 R14: 0000000000498600 R15: 0000000000000000 [ 47.037710][ T410]