[ 10.688096][ T249] ip (249) used greatest stack depth: 24528 bytes left [ 12.517901][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 14.359465][ T313] br1: port 1(veth1) entered blocking state [ 14.359882][ T313] br1: port 1(veth1) entered disabled state [ 14.360254][ T313] veth1: entered allmulticast mode [ 14.369172][ T313] veth1: entered promiscuous mode [ 14.377074][ T313] ip (313) used greatest stack depth: 24192 bytes left [ 14.467953][ T38] br1: port 1(veth1) entered blocking state [ 14.468330][ T38] br1: port 1(veth1) entered forwarding state [ 32.145230][ T453] br1: port 1(veth1) entered disabled state [ 32.174033][ T453] ip (453) used greatest stack depth: 24184 bytes left [ 32.241381][ T454] veth1: left allmulticast mode [ 32.241631][ T454] veth1: left promiscuous mode [ 32.241965][ T454] br1: port 1(veth1) entered disabled state [ 33.482076][ T467] [ 33.482224][ T467] ============================================ [ 33.482421][ T467] WARNING: possible recursive locking detected [ 33.482603][ T467] 6.13.0-rc5-virtme #1 Not tainted [ 33.482748][ T467] -------------------------------------------- [ 33.482933][ T467] ip/467 is trying to acquire lock: [ 33.483081][ T467] ffffffff8d3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.483395][ T467] [ 33.483395][ T467] but task is already holding lock: [ 33.483619][ T467] ffffffff8d3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.483917][ T467] [ 33.483917][ T467] other info that might help us debug this: [ 33.484133][ T467] Possible unsafe locking scenario: [ 33.484133][ T467] [ 33.484349][ T467] CPU0 [ 33.484462][ T467] ---- [ 33.484574][ T467] lock((netdev_chain).rwsem); [ 33.484720][ T467] lock((netdev_chain).rwsem); [ 33.484871][ T467] [ 33.484871][ T467] *** DEADLOCK *** [ 33.484871][ T467] [ 33.485097][ T467] May be due to missing lock nesting notation [ 33.485097][ T467] [ 33.485324][ T467] 2 locks held by ip/467: [ 33.485437][ T467] #0: ffffffff8d3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 33.485706][ T467] #1: ffffffff8d3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.485998][ T467] [ 33.485998][ T467] stack backtrace: [ 33.486177][ T467] CPU: 3 UID: 0 PID: 467 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 33.486403][ T467] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 33.486585][ T467] Call Trace: [ 33.486698][ T467] [ 33.486774][ T467] dump_stack_lvl+0x82/0xd0 [ 33.486930][ T467] print_deadlock_bug+0x40a/0x650 [ 33.487080][ T467] validate_chain+0x5bf/0xae0 [ 33.487239][ T467] ? __pfx_validate_chain+0x10/0x10 [ 33.487395][ T467] ? hlock_class+0x4e/0x130 [ 33.487541][ T467] ? mark_lock+0x38/0x3e0 [ 33.487653][ T467] __lock_acquire+0xb9a/0x1680 [ 33.487799][ T467] lock_acquire.part.0+0xeb/0x330 [ 33.487948][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.488132][ T467] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 33.488321][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.488476][ T467] ? trace_lock_acquire+0x14c/0x1f0 [ 33.488626][ T467] ? lock_acquire+0x32/0xc0 [ 33.488776][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.488960][ T467] down_read+0x9f/0x340 [ 33.489073][ T467] ? blocking_notifier_call_chain+0x50/0x90 [ 33.489255][ T467] ? __pfx_down_read+0x10/0x10 [ 33.489401][ T467] ? __lock_release+0x103/0x460 [ 33.489547][ T467] ? netconsole_netdev_event+0x2c1/0x620 [ 33.489700][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.489848][ T467] blocking_notifier_call_chain+0x50/0x90 [ 33.489996][ T467] __netdev_upper_dev_unlink+0xd9/0x220 [ 33.490145][ T467] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 33.490327][ T467] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 33.490475][ T467] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 33.490666][ T467] ? rtnl_is_locked+0x15/0x20 [ 33.490813][ T467] netdev_upper_dev_unlink+0x71/0xa0 [ 33.490957][ T467] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 33.491138][ T467] ? netconsole_netdev_event+0x2c1/0x620 [ 33.491284][ T467] ? mutex_is_locked+0x1c/0x60 [ 33.491432][ T467] ? rtnl_is_locked+0x15/0x20 [ 33.491578][ T467] ? netdev_master_upper_dev_get+0x13/0x120 [ 33.491767][ T467] vrf_device_event+0x78/0xe0 [vrf] [ 33.491919][ T467] notifier_call_chain+0xcd/0x150 [ 33.492065][ T467] blocking_notifier_call_chain+0x66/0x90 [ 33.492213][ T467] unregister_netdevice_many_notify+0xa7b/0x1580 [ 33.492396][ T467] ? __lock_release+0x103/0x460 [ 33.492543][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.492691][ T467] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 33.492882][ T467] ? hlock_class+0x4e/0x130 [ 33.493027][ T467] ? mark_held_locks+0x9e/0xe0 [ 33.493174][ T467] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 33.493323][ T467] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 33.493507][ T467] rtnl_dellink+0x348/0xa40 [ 33.493656][ T467] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.493819][ T467] ? find_held_lock+0x2c/0x110 [ 33.493978][ T467] ? __lock_release+0x103/0x460 [ 33.494125][ T467] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.494270][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.494417][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.494564][ T467] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.494711][ T467] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.494856][ T467] rtnetlink_rcv_msg+0x712/0xc10 [ 33.495007][ T467] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.495154][ T467] ? hlock_class+0x4e/0x130 [ 33.495299][ T467] ? mark_lock+0x38/0x3e0 [ 33.495412][ T467] ? __lock_acquire+0xb9a/0x1680 [ 33.495559][ T467] netlink_rcv_skb+0x130/0x360 [ 33.495709][ T467] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.495857][ T467] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 33.496011][ T467] ? netlink_deliver_tap+0x13e/0x340 [ 33.496160][ T467] ? netlink_deliver_tap+0xc3/0x340 [ 33.496307][ T467] netlink_unicast+0x44b/0x710 [ 33.496453][ T467] ? __pfx_netlink_unicast+0x10/0x10 [ 33.496601][ T467] ? find_held_lock+0x2c/0x110 [ 33.496749][ T467] netlink_sendmsg+0x723/0xbe0 [ 33.496904][ T467] ? __pfx_netlink_sendmsg+0x10/0x10 [ 33.497058][ T467] ____sys_sendmsg+0x7ac/0xa10 [ 33.497214][ T467] ? __pfx_____sys_sendmsg+0x10/0x10 [ 33.497362][ T467] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 33.497549][ T467] ___sys_sendmsg+0xee/0x170 [ 33.497701][ T467] ? __pfx____sys_sendmsg+0x10/0x10 [ 33.497851][ T467] ? kasan_save_stack+0x34/0x50 [ 33.497998][ T467] ? kasan_save_stack+0x24/0x50 [ 33.498148][ T467] ? __kasan_record_aux_stack+0x8e/0xa0 [ 33.498301][ T467] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 33.498489][ T467] ? __x64_sys_close+0x7c/0xd0 [ 33.498636][ T467] ? do_syscall_64+0xc1/0x1d0 [ 33.498784][ T467] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.498970][ T467] ? __lock_acquire+0xb9a/0x1680 [ 33.499118][ T467] ? find_held_lock+0x2c/0x110 [ 33.499266][ T467] ? __lock_release+0x103/0x460 [ 33.499420][ T467] ? __virt_addr_valid+0x22b/0x430 [ 33.499570][ T467] ? __pfx___lock_release+0x10/0x10 [ 33.499716][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.499865][ T467] __sys_sendmsg+0x109/0x1a0 [ 33.500013][ T467] ? __pfx___sys_sendmsg+0x10/0x10 [ 33.500160][ T467] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 33.500355][ T467] do_syscall_64+0xc1/0x1d0 [ 33.500500][ T467] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.500688][ T467] RIP: 0033:0x7f65935dd9a7 [ 33.500846][ 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 [ 33.501367][ T467] RSP: 002b:00007fffce65d5b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.501601][ T467] RAX: ffffffffffffffda RBX: 00007fffce65dce0 RCX: 00007f65935dd9a7 [ 33.501826][ T467] RDX: 0000000000000000 RSI: 00007fffce65d620 RDI: 0000000000000005 [ 33.502048][ T467] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 33.502271][ T467] R10: 00007f659349bef8 R11: 0000000000000246 R12: 0000000000000002 [ 33.502500][ T467] R13: 00000000677904a7 R14: 0000000000498600 R15: 0000000000000000 [ 33.502726][ T467] [ 33.517956][ T467] ip (467) used greatest stack depth: 23704 bytes left