[ 11.135925][ T258] ip (258) used greatest stack depth: 23552 bytes left [ 12.731690][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 15.571146][ T323] br1: port 1(veth1) entered blocking state [ 15.572161][ T323] br1: port 1(veth1) entered disabled state [ 15.572568][ T323] veth1: entered allmulticast mode [ 15.576527][ T323] veth1: entered promiscuous mode [ 15.665181][ T37] br1: port 1(veth1) entered blocking state [ 15.665559][ T37] br1: port 1(veth1) entered forwarding state [ 46.652422][ T502] br1: port 1(veth1) entered disabled state [ 46.733898][ T503] veth1: left allmulticast mode [ 46.734144][ T503] veth1: left promiscuous mode [ 46.734936][ T503] br1: port 1(veth1) entered disabled state [ 48.195223][ T522] [ 48.195419][ T522] ============================================ [ 48.195605][ T522] WARNING: possible recursive locking detected [ 48.195792][ T522] 6.13.0-rc5-virtme #1 Not tainted [ 48.195942][ T522] -------------------------------------------- [ 48.196121][ T522] ip/522 is trying to acquire lock: [ 48.196267][ T522] ffffffffb4fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.196574][ T522] [ 48.196574][ T522] but task is already holding lock: [ 48.196788][ T522] ffffffffb4fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.197080][ T522] [ 48.197080][ T522] other info that might help us debug this: [ 48.197304][ T522] Possible unsafe locking scenario: [ 48.197304][ T522] [ 48.197536][ T522] CPU0 [ 48.197644][ T522] ---- [ 48.197752][ T522] lock((netdev_chain).rwsem); [ 48.197898][ T522] lock((netdev_chain).rwsem); [ 48.198041][ T522] [ 48.198041][ T522] *** DEADLOCK *** [ 48.198041][ T522] [ 48.198258][ T522] May be due to missing lock nesting notation [ 48.198258][ T522] [ 48.198483][ T522] 2 locks held by ip/522: [ 48.198596][ T522] #0: ffffffffb4fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 48.198863][ T522] #1: ffffffffb4fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.199163][ T522] [ 48.199163][ T522] stack backtrace: [ 48.199342][ T522] CPU: 0 UID: 0 PID: 522 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 48.199561][ T522] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 48.199740][ T522] Call Trace: [ 48.199852][ T522] [ 48.199928][ T522] dump_stack_lvl+0x82/0xd0 [ 48.200081][ T522] print_deadlock_bug+0x40a/0x650 [ 48.200227][ T522] validate_chain+0x5bf/0xae0 [ 48.200373][ T522] ? __pfx_validate_chain+0x10/0x10 [ 48.200522][ T522] ? hlock_class+0x4e/0x130 [ 48.200664][ T522] ? mark_lock+0x38/0x3e0 [ 48.200775][ T522] __lock_acquire+0xb9a/0x1680 [ 48.200922][ T522] lock_acquire.part.0+0xeb/0x330 [ 48.201068][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 48.201252][ T522] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 48.201463][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.201610][ T522] ? trace_lock_acquire+0x14c/0x1f0 [ 48.201757][ T522] ? lock_acquire+0x32/0xc0 [ 48.201903][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 48.202083][ T522] down_read+0x9f/0x340 [ 48.202197][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 48.202379][ T522] ? __pfx_down_read+0x10/0x10 [ 48.202524][ T522] ? __lock_release+0x103/0x460 [ 48.202668][ T522] ? netconsole_netdev_event+0x2c1/0x620 [ 48.202817][ T522] ? __pfx___lock_release+0x10/0x10 [ 48.202962][ T522] blocking_notifier_call_chain+0x50/0x90 [ 48.203106][ T522] __netdev_upper_dev_unlink+0xd9/0x220 [ 48.203256][ T522] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 48.203437][ T522] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 48.203583][ T522] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 48.203762][ T522] ? rtnl_is_locked+0x15/0x20 [ 48.203910][ T522] netdev_upper_dev_unlink+0x71/0xa0 [ 48.204056][ T522] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 48.204235][ T522] ? netconsole_netdev_event+0x2c1/0x620 [ 48.204382][ T522] ? mutex_is_locked+0x1c/0x60 [ 48.204527][ T522] ? rtnl_is_locked+0x15/0x20 [ 48.204672][ T522] ? netdev_master_upper_dev_get+0x13/0x120 [ 48.204852][ T522] vrf_device_event+0x78/0xe0 [vrf] [ 48.205007][ T522] notifier_call_chain+0xcd/0x150 [ 48.205155][ T522] blocking_notifier_call_chain+0x66/0x90 [ 48.205319][ T522] unregister_netdevice_many_notify+0xa7b/0x1580 [ 48.205515][ T522] ? hlock_class+0x4e/0x130 [ 48.205659][ T522] ? mark_lock+0x38/0x3e0 [ 48.205772][ T522] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 48.205952][ T522] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 48.206132][ T522] ? kfree+0xf3/0x330 [ 48.206243][ T522] ? vlan_vid_del+0x310/0x5e0 [ 48.206391][ T522] ? vlan_vid_del+0x310/0x5e0 [ 48.206538][ T522] rtnl_dellink+0x348/0xa40 [ 48.206684][ T522] ? __pfx_rtnl_dellink+0x10/0x10 [ 48.206842][ T522] ? find_held_lock+0x2c/0x110 [ 48.206990][ T522] ? __lock_release+0x103/0x460 [ 48.207136][ T522] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 48.207280][ T522] ? __pfx___lock_release+0x10/0x10 [ 48.207425][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.207579][ T522] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 48.207723][ T522] ? __pfx_rtnl_dellink+0x10/0x10 [ 48.207868][ T522] rtnetlink_rcv_msg+0x712/0xc10 [ 48.208012][ T522] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 48.208159][ T522] ? hlock_class+0x4e/0x130 [ 48.208303][ T522] ? mark_lock+0x38/0x3e0 [ 48.208414][ T522] ? __lock_acquire+0xb9a/0x1680 [ 48.208569][ T522] netlink_rcv_skb+0x130/0x360 [ 48.208720][ T522] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 48.208866][ T522] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 48.209015][ T522] ? netlink_deliver_tap+0x13e/0x340 [ 48.209163][ T522] ? netlink_deliver_tap+0xc3/0x340 [ 48.209337][ T522] netlink_unicast+0x44b/0x710 [ 48.209486][ T522] ? __pfx_netlink_unicast+0x10/0x10 [ 48.209634][ T522] ? find_held_lock+0x2c/0x110 [ 48.209783][ T522] netlink_sendmsg+0x723/0xbe0 [ 48.209930][ T522] ? __pfx_netlink_sendmsg+0x10/0x10 [ 48.210079][ T522] ____sys_sendmsg+0x7ac/0xa10 [ 48.210225][ T522] ? __pfx_____sys_sendmsg+0x10/0x10 [ 48.210370][ T522] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 48.210555][ T522] ___sys_sendmsg+0xee/0x170 [ 48.210702][ T522] ? __pfx____sys_sendmsg+0x10/0x10 [ 48.210853][ T522] ? kasan_save_stack+0x34/0x50 [ 48.210999][ T522] ? kasan_save_stack+0x24/0x50 [ 48.211146][ T522] ? __kasan_record_aux_stack+0x8e/0xa0 [ 48.211306][ T522] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 48.211488][ T522] ? __x64_sys_close+0x7c/0xd0 [ 48.211638][ T522] ? do_syscall_64+0xc1/0x1d0 [ 48.211785][ T522] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.211971][ T522] ? __lock_acquire+0xb9a/0x1680 [ 48.212119][ T522] ? find_held_lock+0x2c/0x110 [ 48.212266][ T522] ? __lock_release+0x103/0x460 [ 48.212412][ T522] ? __virt_addr_valid+0x22b/0x430 [ 48.212559][ T522] ? __pfx___lock_release+0x10/0x10 [ 48.212705][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.212853][ T522] __sys_sendmsg+0x109/0x1a0 [ 48.213002][ T522] ? __pfx___sys_sendmsg+0x10/0x10 [ 48.213149][ T522] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 48.213358][ T522] do_syscall_64+0xc1/0x1d0 [ 48.213505][ T522] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.213690][ T522] RIP: 0033:0x7f19d6f949a7 [ 48.213843][ T522] 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 [ 48.214359][ T522] RSP: 002b:00007ffc23485068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 48.214579][ T522] RAX: ffffffffffffffda RBX: 00007ffc23485790 RCX: 00007f19d6f949a7 [ 48.214798][ T522] RDX: 0000000000000000 RSI: 00007ffc234850d0 RDI: 0000000000000005 [ 48.215021][ T522] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 48.215240][ T522] R10: 00007f19d6e52ef8 R11: 0000000000000246 R12: 0000000000000002 [ 48.215458][ T522] R13: 0000000067792ed5 R14: 0000000000498600 R15: 0000000000000000 [ 48.215679][ T522]