[ 10.616205][ T249] ip (249) used greatest stack depth: 24336 bytes left [ 10.989081][ T259] ip (259) used greatest stack depth: 23112 bytes left [ 12.564541][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 15.455424][ T322] br1: port 1(veth1) entered blocking state [ 15.455891][ T322] br1: port 1(veth1) entered disabled state [ 15.456544][ T322] veth1: entered allmulticast mode [ 15.458739][ T322] veth1: entered promiscuous mode [ 15.566273][ T45] br1: port 1(veth1) entered blocking state [ 15.566750][ T45] br1: port 1(veth1) entered forwarding state [ 46.725890][ T501] br1: port 1(veth1) entered disabled state [ 46.803359][ T502] veth1: left allmulticast mode [ 46.803660][ T502] veth1: left promiscuous mode [ 46.804033][ T502] br1: port 1(veth1) entered disabled state [ 48.339209][ T521] [ 48.339362][ T521] ============================================ [ 48.339565][ T521] WARNING: possible recursive locking detected [ 48.339769][ T521] 6.13.0-rc5-virtme #1 Not tainted [ 48.339927][ T521] -------------------------------------------- [ 48.340122][ T521] ip/521 is trying to acquire lock: [ 48.340287][ T521] ffffffff9ebd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.340624][ T521] [ 48.340624][ T521] but task is already holding lock: [ 48.340861][ T521] ffffffff9ebd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.341199][ T521] [ 48.341199][ T521] other info that might help us debug this: [ 48.341433][ T521] Possible unsafe locking scenario: [ 48.341433][ T521] [ 48.341666][ T521] CPU0 [ 48.341789][ T521] ---- [ 48.341913][ T521] lock((netdev_chain).rwsem); [ 48.342074][ T521] lock((netdev_chain).rwsem); [ 48.342232][ T521] [ 48.342232][ T521] *** DEADLOCK *** [ 48.342232][ T521] [ 48.342472][ T521] May be due to missing lock nesting notation [ 48.342472][ T521] [ 48.342700][ T521] 2 locks held by ip/521: [ 48.342825][ T521] #0: ffffffff9ebe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 48.343115][ T521] #1: ffffffff9ebd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 48.343434][ T521] [ 48.343434][ T521] stack backtrace: [ 48.343636][ T521] CPU: 2 UID: 0 PID: 521 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 48.343878][ T521] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 48.344080][ T521] Call Trace: [ 48.344209][ T521] [ 48.344293][ T521] dump_stack_lvl+0x82/0xd0 [ 48.344457][ T521] print_deadlock_bug+0x40a/0x650 [ 48.344617][ T521] validate_chain+0x5bf/0xae0 [ 48.344774][ T521] ? __pfx_validate_chain+0x10/0x10 [ 48.344936][ T521] ? hlock_class+0x4e/0x130 [ 48.345092][ T521] ? mark_lock+0x38/0x3e0 [ 48.345221][ T521] __lock_acquire+0xb9a/0x1680 [ 48.345379][ T521] lock_acquire.part.0+0xeb/0x330 [ 48.345538][ T521] ? blocking_notifier_call_chain+0x50/0x90 [ 48.345736][ T521] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 48.345939][ T521] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.346100][ T521] ? trace_lock_acquire+0x14c/0x1f0 [ 48.346263][ T521] ? lock_acquire+0x32/0xc0 [ 48.346429][ T521] ? blocking_notifier_call_chain+0x50/0x90 [ 48.346623][ T521] down_read+0x9f/0x340 [ 48.346734][ T521] ? blocking_notifier_call_chain+0x50/0x90 [ 48.346914][ T521] ? __pfx_down_read+0x10/0x10 [ 48.347060][ T521] ? __lock_release+0x103/0x460 [ 48.347203][ T521] ? netconsole_netdev_event+0x2c1/0x620 [ 48.347345][ T521] ? __pfx___lock_release+0x10/0x10 [ 48.347510][ T521] blocking_notifier_call_chain+0x50/0x90 [ 48.347657][ T521] __netdev_upper_dev_unlink+0xd9/0x220 [ 48.347804][ T521] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 48.347984][ T521] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 48.348130][ T521] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 48.348309][ T521] ? rtnl_is_locked+0x15/0x20 [ 48.348465][ T521] netdev_upper_dev_unlink+0x71/0xa0 [ 48.348611][ T521] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 48.348787][ T521] ? netconsole_netdev_event+0x2c1/0x620 [ 48.348932][ T521] ? mutex_is_locked+0x1c/0x60 [ 48.349078][ T521] ? rtnl_is_locked+0x15/0x20 [ 48.349238][ T521] ? netdev_master_upper_dev_get+0x13/0x120 [ 48.349421][ T521] vrf_device_event+0x78/0xe0 [vrf] [ 48.349591][ T521] notifier_call_chain+0xcd/0x150 [ 48.349749][ T521] blocking_notifier_call_chain+0x66/0x90 [ 48.349904][ T521] unregister_netdevice_many_notify+0xa7b/0x1580 [ 48.350097][ T521] ? hlock_class+0x4e/0x130 [ 48.350242][ T521] ? mark_lock+0x38/0x3e0 [ 48.350354][ T521] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 48.350534][ T521] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 48.350728][ T521] ? kfree+0xf3/0x330 [ 48.350854][ T521] ? vlan_vid_del+0x310/0x5e0 [ 48.351021][ T521] ? vlan_vid_del+0x310/0x5e0 [ 48.351182][ T521] rtnl_dellink+0x348/0xa40 [ 48.351343][ T521] ? __pfx_rtnl_dellink+0x10/0x10 [ 48.351515][ T521] ? find_held_lock+0x2c/0x110 [ 48.351678][ T521] ? __lock_release+0x103/0x460 [ 48.351823][ T521] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 48.351998][ T521] ? __pfx___lock_release+0x10/0x10 [ 48.352150][ T521] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.352313][ T521] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 48.352472][ T521] ? __pfx_rtnl_dellink+0x10/0x10 [ 48.352641][ T521] rtnetlink_rcv_msg+0x712/0xc10 [ 48.352798][ T521] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 48.352967][ T521] ? hlock_class+0x4e/0x130 [ 48.353141][ T521] ? mark_lock+0x38/0x3e0 [ 48.353262][ T521] ? __lock_acquire+0xb9a/0x1680 [ 48.353422][ T521] netlink_rcv_skb+0x130/0x360 [ 48.353585][ T521] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 48.353754][ T521] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 48.353918][ T521] ? netlink_deliver_tap+0x13e/0x340 [ 48.354078][ T521] ? netlink_deliver_tap+0xc3/0x340 [ 48.354244][ T521] netlink_unicast+0x44b/0x710 [ 48.354405][ T521] ? __pfx_netlink_unicast+0x10/0x10 [ 48.354561][ T521] ? find_held_lock+0x2c/0x110 [ 48.354724][ T521] netlink_sendmsg+0x723/0xbe0 [ 48.354884][ T521] ? __pfx_netlink_sendmsg+0x10/0x10 [ 48.355047][ T521] ____sys_sendmsg+0x7ac/0xa10 [ 48.355208][ T521] ? __pfx_____sys_sendmsg+0x10/0x10 [ 48.355371][ T521] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 48.355574][ T521] ___sys_sendmsg+0xee/0x170 [ 48.355733][ T521] ? __pfx____sys_sendmsg+0x10/0x10 [ 48.355893][ T521] ? kasan_save_stack+0x34/0x50 [ 48.356061][ T521] ? kasan_save_stack+0x24/0x50 [ 48.356221][ T521] ? __kasan_record_aux_stack+0x8e/0xa0 [ 48.356381][ T521] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 48.356587][ T521] ? __x64_sys_close+0x7c/0xd0 [ 48.356747][ T521] ? do_syscall_64+0xc1/0x1d0 [ 48.356909][ T521] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.357116][ T521] ? __lock_acquire+0xb9a/0x1680 [ 48.357277][ T521] ? find_held_lock+0x2c/0x110 [ 48.357444][ T521] ? __lock_release+0x103/0x460 [ 48.357604][ T521] ? __virt_addr_valid+0x22b/0x430 [ 48.357765][ T521] ? __pfx___lock_release+0x10/0x10 [ 48.357930][ T521] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.358098][ T521] __sys_sendmsg+0x109/0x1a0 [ 48.358260][ T521] ? __pfx___sys_sendmsg+0x10/0x10 [ 48.358418][ T521] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 48.358622][ T521] do_syscall_64+0xc1/0x1d0 [ 48.358791][ T521] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 48.358992][ T521] RIP: 0033:0x7fbce8b179a7 [ 48.359158][ T521] 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 [ 48.359723][ T521] RSP: 002b:00007ffd8422ca78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 48.359974][ T521] RAX: ffffffffffffffda RBX: 00007ffd8422d1a0 RCX: 00007fbce8b179a7 [ 48.360221][ T521] RDX: 0000000000000000 RSI: 00007ffd8422cae0 RDI: 0000000000000005 [ 48.360458][ T521] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 48.360705][ T521] R10: 00007fbce89d5ef8 R11: 0000000000000246 R12: 0000000000000002 [ 48.360955][ T521] R13: 0000000067790437 R14: 0000000000498600 R15: 0000000000000000 [ 48.361204][ T521]