[ 10.699367][ T250] ip (250) used greatest stack depth: 24160 bytes left [ 12.501575][ T289] 8021q: 802.1Q VLAN Support v1.8 [ 14.644772][ T318] br1: port 1(veth1) entered blocking state [ 14.645293][ T318] br1: port 1(veth1) entered disabled state [ 14.645878][ T318] veth1: entered allmulticast mode [ 14.647875][ T318] veth1: entered promiscuous mode [ 14.729873][ T40] br1: port 1(veth1) entered blocking state [ 14.730306][ T40] br1: port 1(veth1) entered forwarding state [ 28.039350][ T416] ip (416) used greatest stack depth: 23648 bytes left [ 28.112525][ T417] br1: port 1(veth1) entered disabled state [ 28.192812][ T418] veth1: left allmulticast mode [ 28.193331][ T418] veth1: left promiscuous mode [ 28.193726][ T418] br1: port 1(veth1) entered disabled state [ 29.595422][ T435] [ 29.595590][ T435] ============================================ [ 29.595777][ T435] WARNING: possible recursive locking detected [ 29.595960][ T435] 6.13.0-rc5-virtme #1 Not tainted [ 29.596115][ T435] -------------------------------------------- [ 29.596295][ T435] ip/435 is trying to acquire lock: [ 29.596440][ T435] ffffffff867d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.596742][ T435] [ 29.596742][ T435] but task is already holding lock: [ 29.596964][ T435] ffffffff867d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.597277][ T435] [ 29.597277][ T435] other info that might help us debug this: [ 29.597501][ T435] Possible unsafe locking scenario: [ 29.597501][ T435] [ 29.597723][ T435] CPU0 [ 29.597831][ T435] ---- [ 29.597943][ T435] lock((netdev_chain).rwsem); [ 29.598092][ T435] lock((netdev_chain).rwsem); [ 29.598238][ T435] [ 29.598238][ T435] *** DEADLOCK *** [ 29.598238][ T435] [ 29.598453][ T435] May be due to missing lock nesting notation [ 29.598453][ T435] [ 29.598672][ T435] 2 locks held by ip/435: [ 29.598785][ T435] #0: ffffffff867e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.599053][ T435] #1: ffffffff867d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.599355][ T435] [ 29.599355][ T435] stack backtrace: [ 29.599533][ T435] CPU: 3 UID: 0 PID: 435 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.599753][ T435] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.599934][ T435] Call Trace: [ 29.600045][ T435] [ 29.600122][ T435] dump_stack_lvl+0x82/0xd0 [ 29.600273][ T435] print_deadlock_bug+0x40a/0x650 [ 29.600424][ T435] validate_chain+0x5bf/0xae0 [ 29.600571][ T435] ? __pfx_validate_chain+0x10/0x10 [ 29.600718][ T435] ? hlock_class+0x4e/0x130 [ 29.600873][ T435] ? mark_lock+0x38/0x3e0 [ 29.601004][ T435] __lock_acquire+0xb9a/0x1680 [ 29.601172][ T435] lock_acquire.part.0+0xeb/0x330 [ 29.601334][ T435] ? blocking_notifier_call_chain+0x50/0x90 [ 29.601534][ T435] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.601756][ T435] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.601924][ T435] ? trace_lock_acquire+0x14c/0x1f0 [ 29.602092][ T435] ? lock_acquire+0x32/0xc0 [ 29.602263][ T435] ? blocking_notifier_call_chain+0x50/0x90 [ 29.602477][ T435] down_read+0x9f/0x340 [ 29.602605][ T435] ? blocking_notifier_call_chain+0x50/0x90 [ 29.602818][ T435] ? __pfx_down_read+0x10/0x10 [ 29.602988][ T435] ? __lock_release+0x103/0x460 [ 29.603157][ T435] ? netconsole_netdev_event+0x2c1/0x620 [ 29.603329][ T435] ? __pfx___lock_release+0x10/0x10 [ 29.603499][ T435] blocking_notifier_call_chain+0x50/0x90 [ 29.603673][ T435] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.603844][ T435] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.604058][ T435] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.604228][ T435] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.604442][ T435] ? rtnl_is_locked+0x15/0x20 [ 29.604613][ T435] netdev_upper_dev_unlink+0x71/0xa0 [ 29.604783][ T435] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.604994][ T435] ? netconsole_netdev_event+0x2c1/0x620 [ 29.605165][ T435] ? mutex_is_locked+0x1c/0x60 [ 29.605333][ T435] ? rtnl_is_locked+0x15/0x20 [ 29.605499][ T435] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.605703][ T435] vrf_device_event+0x78/0xe0 [vrf] [ 29.605871][ T435] notifier_call_chain+0xcd/0x150 [ 29.606034][ T435] blocking_notifier_call_chain+0x66/0x90 [ 29.606198][ T435] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.606401][ T435] ? __lock_release+0x103/0x460 [ 29.606568][ T435] ? __pfx___lock_release+0x10/0x10 [ 29.606735][ T435] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.606939][ T435] ? hlock_class+0x4e/0x130 [ 29.607105][ T435] ? mark_held_locks+0x9e/0xe0 [ 29.607271][ T435] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 29.607438][ T435] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 29.607649][ T435] rtnl_dellink+0x348/0xa40 [ 29.607815][ T435] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.607993][ T435] ? find_held_lock+0x2c/0x110 [ 29.608159][ T435] ? __lock_release+0x103/0x460 [ 29.608325][ T435] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.608489][ T435] ? __pfx___lock_release+0x10/0x10 [ 29.608651][ T435] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.608815][ T435] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.608984][ T435] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.609151][ T435] rtnetlink_rcv_msg+0x712/0xc10 [ 29.609316][ T435] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.609483][ T435] ? hlock_class+0x4e/0x130 [ 29.609646][ T435] ? mark_lock+0x38/0x3e0 [ 29.609771][ T435] ? __lock_acquire+0xb9a/0x1680 [ 29.609937][ T435] netlink_rcv_skb+0x130/0x360 [ 29.610106][ T435] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.610273][ T435] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.610443][ T435] ? netlink_deliver_tap+0x13e/0x340 [ 29.610608][ T435] ? netlink_deliver_tap+0xc3/0x340 [ 29.610774][ T435] netlink_unicast+0x44b/0x710 [ 29.610937][ T435] ? __pfx_netlink_unicast+0x10/0x10 [ 29.611099][ T435] ? find_held_lock+0x2c/0x110 [ 29.611259][ T435] netlink_sendmsg+0x723/0xbe0 [ 29.611427][ T435] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.611597][ T435] ____sys_sendmsg+0x7ac/0xa10 [ 29.611774][ T435] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.611940][ T435] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.612147][ T435] ___sys_sendmsg+0xee/0x170 [ 29.612313][ T435] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.612483][ T435] ? kasan_save_stack+0x34/0x50 [ 29.612652][ T435] ? kasan_save_stack+0x24/0x50 [ 29.612820][ T435] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.612994][ T435] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.613204][ T435] ? __x64_sys_close+0x7c/0xd0 [ 29.613373][ T435] ? do_syscall_64+0xc1/0x1d0 [ 29.613542][ T435] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.613758][ T435] ? __lock_acquire+0xb9a/0x1680 [ 29.613926][ T435] ? find_held_lock+0x2c/0x110 [ 29.614095][ T435] ? __lock_release+0x103/0x460 [ 29.614266][ T435] ? __virt_addr_valid+0x22b/0x430 [ 29.614435][ T435] ? __pfx___lock_release+0x10/0x10 [ 29.614603][ T435] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.614773][ T435] __sys_sendmsg+0x109/0x1a0 [ 29.614946][ T435] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.615118][ T435] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.615332][ T435] do_syscall_64+0xc1/0x1d0 [ 29.615504][ T435] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.615717][ T435] RIP: 0033:0x7fd187cce9a7 [ 29.615892][ T435] 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 [ 29.616491][ T435] RSP: 002b:00007ffd63872e68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.616750][ T435] RAX: ffffffffffffffda RBX: 00007ffd63873590 RCX: 00007fd187cce9a7 [ 29.617004][ T435] RDX: 0000000000000000 RSI: 00007ffd63872ed0 RDI: 0000000000000005 [ 29.617260][ T435] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.617518][ T435] R10: 00007fd187b8cef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.617773][ T435] R13: 000000006779014a R14: 0000000000498600 R15: 0000000000000000 [ 29.618028][ T435]