[ 10.797843][ T249] ip (249) used greatest stack depth: 23248 bytes left [ 12.787940][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 15.026766][ T314] br1: port 1(veth1) entered blocking state [ 15.027304][ T314] br1: port 1(veth1) entered disabled state [ 15.027672][ T314] veth1: entered allmulticast mode [ 15.029680][ T314] veth1: entered promiscuous mode [ 15.105571][ T39] br1: port 1(veth1) entered blocking state [ 15.106112][ T39] br1: port 1(veth1) entered forwarding state [ 28.707588][ T413] br1: port 1(veth1) entered disabled state [ 28.791235][ T414] veth1: left allmulticast mode [ 28.792606][ T414] veth1: left promiscuous mode [ 28.792986][ T414] br1: port 1(veth1) entered disabled state [ 30.212358][ T431] [ 30.212584][ T431] ============================================ [ 30.212783][ T431] WARNING: possible recursive locking detected [ 30.212962][ T431] 6.13.0-rc5-virtme #1 Not tainted [ 30.213115][ T431] -------------------------------------------- [ 30.213302][ T431] ip/431 is trying to acquire lock: [ 30.213453][ T431] ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.213761][ T431] [ 30.213761][ T431] but task is already holding lock: [ 30.213977][ T431] ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.214278][ T431] [ 30.214278][ T431] other info that might help us debug this: [ 30.214493][ T431] Possible unsafe locking scenario: [ 30.214493][ T431] [ 30.214707][ T431] CPU0 [ 30.214818][ T431] ---- [ 30.214932][ T431] lock((netdev_chain).rwsem); [ 30.215080][ T431] lock((netdev_chain).rwsem); [ 30.215230][ T431] [ 30.215230][ T431] *** DEADLOCK *** [ 30.215230][ T431] [ 30.215446][ T431] May be due to missing lock nesting notation [ 30.215446][ T431] [ 30.215674][ T431] 2 locks held by ip/431: [ 30.215787][ T431] #0: ffffffff885e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 30.216054][ T431] #1: ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.216355][ T431] [ 30.216355][ T431] stack backtrace: [ 30.216545][ T431] CPU: 2 UID: 0 PID: 431 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 30.216765][ T431] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.216949][ T431] Call Trace: [ 30.217061][ T431] [ 30.217140][ T431] dump_stack_lvl+0x82/0xd0 [ 30.217296][ T431] print_deadlock_bug+0x40a/0x650 [ 30.217443][ T431] validate_chain+0x5bf/0xae0 [ 30.217600][ T431] ? __pfx_validate_chain+0x10/0x10 [ 30.217752][ T431] ? hlock_class+0x4e/0x130 [ 30.217897][ T431] ? mark_lock+0x38/0x3e0 [ 30.218011][ T431] __lock_acquire+0xb9a/0x1680 [ 30.218160][ T431] lock_acquire.part.0+0xeb/0x330 [ 30.218305][ T431] ? blocking_notifier_call_chain+0x50/0x90 [ 30.218486][ T431] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 30.218672][ T431] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.218825][ T431] ? trace_lock_acquire+0x14c/0x1f0 [ 30.218984][ T431] ? lock_acquire+0x32/0xc0 [ 30.219135][ T431] ? blocking_notifier_call_chain+0x50/0x90 [ 30.219319][ T431] down_read+0x9f/0x340 [ 30.219433][ T431] ? blocking_notifier_call_chain+0x50/0x90 [ 30.219614][ T431] ? __pfx_down_read+0x10/0x10 [ 30.219760][ T431] ? __lock_release+0x103/0x460 [ 30.219911][ T431] ? netconsole_netdev_event+0x2c1/0x620 [ 30.220058][ T431] ? __pfx___lock_release+0x10/0x10 [ 30.220206][ T431] blocking_notifier_call_chain+0x50/0x90 [ 30.220353][ T431] __netdev_upper_dev_unlink+0xd9/0x220 [ 30.220508][ T431] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 30.220689][ T431] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 30.220842][ T431] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 30.221025][ T431] ? rtnl_is_locked+0x15/0x20 [ 30.221175][ T431] netdev_upper_dev_unlink+0x71/0xa0 [ 30.221323][ T431] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 30.221502][ T431] ? netconsole_netdev_event+0x2c1/0x620 [ 30.221650][ T431] ? mutex_is_locked+0x1c/0x60 [ 30.221796][ T431] ? rtnl_is_locked+0x15/0x20 [ 30.221946][ T431] ? netdev_master_upper_dev_get+0x13/0x120 [ 30.222127][ T431] vrf_device_event+0x78/0xe0 [vrf] [ 30.222279][ T431] notifier_call_chain+0xcd/0x150 [ 30.222426][ T431] blocking_notifier_call_chain+0x66/0x90 [ 30.222574][ T431] unregister_netdevice_many_notify+0xa7b/0x1580 [ 30.222753][ T431] ? __lock_release+0x103/0x460 [ 30.222900][ T431] ? __pfx___lock_release+0x10/0x10 [ 30.223054][ T431] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.223236][ T431] ? hlock_class+0x4e/0x130 [ 30.223386][ T431] ? mark_held_locks+0x9e/0xe0 [ 30.223535][ T431] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 30.223684][ T431] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 30.223870][ T431] rtnl_dellink+0x348/0xa40 [ 30.224018][ T431] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.224184][ T431] ? find_held_lock+0x2c/0x110 [ 30.224334][ T431] ? __lock_release+0x103/0x460 [ 30.224481][ T431] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.224628][ T431] ? __pfx___lock_release+0x10/0x10 [ 30.224774][ T431] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.224923][ T431] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.225070][ T431] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.225221][ T431] rtnetlink_rcv_msg+0x712/0xc10 [ 30.225368][ T431] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.225547][ T431] ? hlock_class+0x4e/0x130 [ 30.225696][ T431] ? mark_lock+0x38/0x3e0 [ 30.225809][ T431] ? __lock_acquire+0xb9a/0x1680 [ 30.225956][ T431] netlink_rcv_skb+0x130/0x360 [ 30.226100][ T431] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.226249][ T431] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 30.226399][ T431] ? netlink_deliver_tap+0x13e/0x340 [ 30.226550][ T431] ? netlink_deliver_tap+0xc3/0x340 [ 30.226701][ T431] netlink_unicast+0x44b/0x710 [ 30.226850][ T431] ? __pfx_netlink_unicast+0x10/0x10 [ 30.226995][ T431] ? find_held_lock+0x2c/0x110 [ 30.227144][ T431] netlink_sendmsg+0x723/0xbe0 [ 30.227292][ T431] ? __pfx_netlink_sendmsg+0x10/0x10 [ 30.227440][ T431] ____sys_sendmsg+0x7ac/0xa10 [ 30.227586][ T431] ? __pfx_____sys_sendmsg+0x10/0x10 [ 30.227738][ T431] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 30.227924][ T431] ___sys_sendmsg+0xee/0x170 [ 30.228068][ T431] ? __pfx____sys_sendmsg+0x10/0x10 [ 30.228214][ T431] ? kasan_save_stack+0x34/0x50 [ 30.228362][ T431] ? kasan_save_stack+0x24/0x50 [ 30.228505][ T431] ? __kasan_record_aux_stack+0x8e/0xa0 [ 30.228654][ T431] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 30.228839][ T431] ? __x64_sys_close+0x7c/0xd0 [ 30.228999][ T431] ? do_syscall_64+0xc1/0x1d0 [ 30.229147][ T431] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.229337][ T431] ? __lock_acquire+0xb9a/0x1680 [ 30.229488][ T431] ? find_held_lock+0x2c/0x110 [ 30.229640][ T431] ? __lock_release+0x103/0x460 [ 30.229789][ T431] ? __virt_addr_valid+0x22b/0x430 [ 30.229939][ T431] ? __pfx___lock_release+0x10/0x10 [ 30.230086][ T431] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.230234][ T431] __sys_sendmsg+0x109/0x1a0 [ 30.230380][ T431] ? __pfx___sys_sendmsg+0x10/0x10 [ 30.230525][ T431] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 30.230717][ T431] do_syscall_64+0xc1/0x1d0 [ 30.230862][ T431] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.231043][ T431] RIP: 0033:0x7faf4501d9a7 [ 30.231202][ T431] 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 [ 30.231716][ T431] RSP: 002b:00007ffd613b6528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 30.231941][ T431] RAX: ffffffffffffffda RBX: 00007ffd613b6c50 RCX: 00007faf4501d9a7 [ 30.232162][ T431] RDX: 0000000000000000 RSI: 00007ffd613b6590 RDI: 0000000000000005 [ 30.232382][ T431] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 30.232609][ T431] R10: 00007faf44edbef8 R11: 0000000000000246 R12: 0000000000000002 [ 30.232835][ T431] R13: 0000000067792bf3 R14: 0000000000498600 R15: 0000000000000000 [ 30.233061][ T431]