[ 10.880743][ T250] ip (250) used greatest stack depth: 23824 bytes left [ 12.880711][ T290] 8021q: 802.1Q VLAN Support v1.8 [ 14.759130][ T314] br0: port 1(veth1) entered blocking state [ 14.759575][ T314] br0: port 1(veth1) entered disabled state [ 14.759956][ T314] veth1: entered allmulticast mode [ 14.761955][ T314] veth1: entered promiscuous mode [ 14.842016][ T316] br0: port 2(veth2) entered blocking state [ 14.842312][ T316] br0: port 2(veth2) entered disabled state [ 14.842609][ T316] veth2: entered allmulticast mode [ 14.850487][ T316] veth2: entered promiscuous mode [ 15.019744][ T40] br0: port 1(veth1) entered blocking state [ 15.020228][ T40] br0: port 1(veth1) entered forwarding state [ 15.101454][ T40] br0: port 2(veth2) entered blocking state [ 15.101747][ T40] br0: port 2(veth2) entered forwarding state [ 28.448946][ T351] tc (351) used greatest stack depth: 23648 bytes left [ 45.373111][ T408] br0: port 2(veth2) entered disabled state [ 45.450992][ T409] br0: port 1(veth1) entered disabled state [ 45.538668][ T410] veth2: left allmulticast mode [ 45.538911][ T410] veth2: left promiscuous mode [ 45.539232][ T410] br0: port 2(veth2) entered disabled state [ 45.540831][ T410] veth1: left allmulticast mode [ 45.541029][ T410] veth1: left promiscuous mode [ 45.541745][ T410] br0: port 1(veth1) entered disabled state [ 45.678051][ T411] [ 45.678230][ T411] ============================================ [ 45.678444][ T411] WARNING: possible recursive locking detected [ 45.678642][ T411] 6.13.0-rc5-virtme #1 Not tainted [ 45.678804][ T411] -------------------------------------------- [ 45.679003][ T411] ip/411 is trying to acquire lock: [ 45.679172][ T411] ffffffff9add6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.679500][ T411] [ 45.679500][ T411] but task is already holding lock: [ 45.679730][ T411] ffffffff9add6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.680048][ T411] [ 45.680048][ T411] other info that might help us debug this: [ 45.680281][ T411] Possible unsafe locking scenario: [ 45.680281][ T411] [ 45.680513][ T411] CPU0 [ 45.680632][ T411] ---- [ 45.680748][ T411] lock((netdev_chain).rwsem); [ 45.680906][ T411] lock((netdev_chain).rwsem); [ 45.681068][ T411] [ 45.681068][ T411] *** DEADLOCK *** [ 45.681068][ T411] [ 45.681301][ T411] May be due to missing lock nesting notation [ 45.681301][ T411] [ 45.681537][ T411] 2 locks held by ip/411: [ 45.681658][ T411] #0: ffffffff9ade7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 45.681950][ T411] #1: ffffffff9add6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.682267][ T411] [ 45.682267][ T411] stack backtrace: [ 45.682461][ T411] CPU: 2 UID: 0 PID: 411 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 45.682709][ T411] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.682907][ T411] Call Trace: [ 45.683029][ T411] [ 45.683127][ T411] dump_stack_lvl+0x82/0xd0 [ 45.683295][ T411] print_deadlock_bug+0x40a/0x650 [ 45.683458][ T411] validate_chain+0x5bf/0xae0 [ 45.683620][ T411] ? __pfx_validate_chain+0x10/0x10 [ 45.683787][ T411] ? hlock_class+0x4e/0x130 [ 45.683948][ T411] ? mark_lock+0x38/0x3e0 [ 45.684070][ T411] __lock_acquire+0xb9a/0x1680 [ 45.684231][ T411] lock_acquire.part.0+0xeb/0x330 [ 45.684388][ T411] ? blocking_notifier_call_chain+0x50/0x90 [ 45.684586][ T411] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 45.684787][ T411] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.684944][ T411] ? trace_lock_acquire+0x14c/0x1f0 [ 45.685111][ T411] ? lock_acquire+0x32/0xc0 [ 45.685268][ T411] ? blocking_notifier_call_chain+0x50/0x90 [ 45.685469][ T411] down_read+0x9f/0x340 [ 45.685592][ T411] ? blocking_notifier_call_chain+0x50/0x90 [ 45.685793][ T411] ? __pfx_down_read+0x10/0x10 [ 45.685952][ T411] ? __lock_release+0x103/0x460 [ 45.686111][ T411] ? netconsole_netdev_event+0x2c1/0x620 [ 45.686278][ T411] ? __pfx___lock_release+0x10/0x10 [ 45.686441][ T411] blocking_notifier_call_chain+0x50/0x90 [ 45.686602][ T411] __netdev_upper_dev_unlink+0xd9/0x220 [ 45.686762][ T411] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 45.686961][ T411] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 45.687123][ T411] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 45.687330][ T411] ? rtnl_is_locked+0x15/0x20 [ 45.687490][ T411] netdev_upper_dev_unlink+0x71/0xa0 [ 45.687651][ T411] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 45.687850][ T411] ? netconsole_netdev_event+0x2c1/0x620 [ 45.688010][ T411] ? mutex_is_locked+0x1c/0x60 [ 45.688168][ T411] ? rtnl_is_locked+0x15/0x20 [ 45.688326][ T411] ? netdev_master_upper_dev_get+0x13/0x120 [ 45.688529][ T411] vrf_device_event+0x78/0xe0 [vrf] [ 45.688691][ T411] notifier_call_chain+0xcd/0x150 [ 45.688849][ T411] blocking_notifier_call_chain+0x66/0x90 [ 45.689008][ T411] unregister_netdevice_many_notify+0xa7b/0x1580 [ 45.689204][ T411] ? __lock_release+0x103/0x460 [ 45.689361][ T411] ? __pfx___lock_release+0x10/0x10 [ 45.689520][ T411] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.689725][ T411] ? hlock_class+0x4e/0x130 [ 45.689884][ T411] ? mark_held_locks+0x9e/0xe0 [ 45.690042][ T411] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 45.690202][ T411] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 45.690400][ T411] rtnl_dellink+0x348/0xa40 [ 45.690560][ T411] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.690734][ T411] ? find_held_lock+0x2c/0x110 [ 45.690905][ T411] ? __lock_release+0x103/0x460 [ 45.691066][ T411] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.691226][ T411] ? __pfx___lock_release+0x10/0x10 [ 45.691385][ T411] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.691547][ T411] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.691707][ T411] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.691866][ T411] rtnetlink_rcv_msg+0x712/0xc10 [ 45.692030][ T411] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.692189][ T411] ? hlock_class+0x4e/0x130 [ 45.692348][ T411] ? mark_lock+0x38/0x3e0 [ 45.692468][ T411] ? __lock_acquire+0xb9a/0x1680 [ 45.692630][ T411] netlink_rcv_skb+0x130/0x360 [ 45.692789][ T411] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.692949][ T411] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 45.693126][ T411] ? netlink_deliver_tap+0x13e/0x340 [ 45.693287][ T411] ? netlink_deliver_tap+0xc3/0x340 [ 45.693448][ T411] netlink_unicast+0x44b/0x710 [ 45.693607][ T411] ? __pfx_netlink_unicast+0x10/0x10 [ 45.693765][ T411] ? find_held_lock+0x2c/0x110 [ 45.693926][ T411] netlink_sendmsg+0x723/0xbe0 [ 45.694086][ T411] ? __pfx_netlink_sendmsg+0x10/0x10 [ 45.694255][ T411] ____sys_sendmsg+0x7ac/0xa10 [ 45.694415][ T411] ? __pfx_____sys_sendmsg+0x10/0x10 [ 45.694574][ T411] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 45.694779][ T411] ___sys_sendmsg+0xee/0x170 [ 45.694939][ T411] ? __pfx____sys_sendmsg+0x10/0x10 [ 45.695100][ T411] ? kasan_save_stack+0x34/0x50 [ 45.695260][ T411] ? kasan_save_stack+0x24/0x50 [ 45.695420][ T411] ? __kasan_record_aux_stack+0x8e/0xa0 [ 45.695585][ T411] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 45.695785][ T411] ? __x64_sys_close+0x7c/0xd0 [ 45.695944][ T411] ? do_syscall_64+0xc1/0x1d0 [ 45.696105][ T411] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.696305][ T411] ? __lock_acquire+0xb9a/0x1680 [ 45.696467][ T411] ? find_held_lock+0x2c/0x110 [ 45.696629][ T411] ? __lock_release+0x103/0x460 [ 45.696792][ T411] ? __virt_addr_valid+0x22b/0x430 [ 45.696954][ T411] ? __pfx___lock_release+0x10/0x10 [ 45.697113][ T411] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.697277][ T411] __sys_sendmsg+0x109/0x1a0 [ 45.697437][ T411] ? __pfx___sys_sendmsg+0x10/0x10 [ 45.697596][ T411] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 45.697800][ T411] do_syscall_64+0xc1/0x1d0 [ 45.697969][ T411] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.698167][ T411] RIP: 0033:0x7f73d28df9a7 [ 45.698338][ T411] 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 [ 45.698922][ T411] RSP: 002b:00007ffe7d321c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.699169][ T411] RAX: ffffffffffffffda RBX: 00007ffe7d3223a0 RCX: 00007f73d28df9a7 [ 45.699415][ T411] RDX: 0000000000000000 RSI: 00007ffe7d321ce0 RDI: 0000000000000005 [ 45.699659][ T411] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.699900][ T411] R10: 00007f73d279def8 R11: 0000000000000246 R12: 0000000000000002 [ 45.700145][ T411] R13: 00000000677900cb R14: 0000000000498600 R15: 0000000000000000 [ 45.700391][ T411]