[ 11.635976][ T259] ip (259) used greatest stack depth: 23120 bytes left [ 13.211863][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 16.120060][ T322] br1: port 1(veth1) entered blocking state [ 16.120900][ T322] br1: port 1(veth1) entered disabled state [ 16.121361][ T322] veth1: entered allmulticast mode [ 16.123499][ T322] veth1: entered promiscuous mode [ 16.202521][ T82] br1: port 1(veth1) entered blocking state [ 16.203004][ T82] br1: port 1(veth1) entered forwarding state [ 47.788497][ T502] br1: port 1(veth1) entered disabled state [ 47.863410][ T503] veth1: left allmulticast mode [ 47.863679][ T503] veth1: left promiscuous mode [ 47.864027][ T503] br1: port 1(veth1) entered disabled state [ 49.526092][ T522] [ 49.526232][ T522] ============================================ [ 49.526428][ T522] WARNING: possible recursive locking detected [ 49.526624][ T522] 6.13.0-rc5-virtme #1 Not tainted [ 49.526772][ T522] -------------------------------------------- [ 49.526958][ T522] ip/522 is trying to acquire lock: [ 49.527109][ T522] ffffffffb31d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 49.527416][ T522] [ 49.527416][ T522] but task is already holding lock: [ 49.527631][ T522] ffffffffb31d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 49.527936][ T522] [ 49.527936][ T522] other info that might help us debug this: [ 49.528153][ T522] Possible unsafe locking scenario: [ 49.528153][ T522] [ 49.528374][ T522] CPU0 [ 49.528484][ T522] ---- [ 49.528603][ T522] lock((netdev_chain).rwsem); [ 49.528759][ T522] lock((netdev_chain).rwsem); [ 49.528937][ T522] [ 49.528937][ T522] *** DEADLOCK *** [ 49.528937][ T522] [ 49.529164][ T522] May be due to missing lock nesting notation [ 49.529164][ T522] [ 49.529402][ T522] 2 locks held by ip/522: [ 49.529514][ T522] #0: ffffffffb31e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 49.529792][ T522] #1: ffffffffb31d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 49.530096][ T522] [ 49.530096][ T522] stack backtrace: [ 49.530286][ T522] CPU: 3 UID: 0 PID: 522 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 49.530517][ T522] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 49.530708][ T522] Call Trace: [ 49.530829][ T522] [ 49.530906][ T522] dump_stack_lvl+0x82/0xd0 [ 49.531063][ T522] print_deadlock_bug+0x40a/0x650 [ 49.531218][ T522] validate_chain+0x5bf/0xae0 [ 49.531366][ T522] ? __pfx_validate_chain+0x10/0x10 [ 49.531515][ T522] ? hlock_class+0x4e/0x130 [ 49.531662][ T522] ? mark_lock+0x38/0x3e0 [ 49.531781][ T522] __lock_acquire+0xb9a/0x1680 [ 49.531930][ T522] lock_acquire.part.0+0xeb/0x330 [ 49.532083][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 49.532274][ T522] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 49.532463][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 49.532615][ T522] ? trace_lock_acquire+0x14c/0x1f0 [ 49.532768][ T522] ? lock_acquire+0x32/0xc0 [ 49.532920][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 49.533103][ T522] down_read+0x9f/0x340 [ 49.533215][ T522] ? blocking_notifier_call_chain+0x50/0x90 [ 49.533395][ T522] ? __pfx_down_read+0x10/0x10 [ 49.533543][ T522] ? __lock_release+0x103/0x460 [ 49.533687][ T522] ? netconsole_netdev_event+0x2c1/0x620 [ 49.533835][ T522] ? __pfx___lock_release+0x10/0x10 [ 49.533988][ T522] blocking_notifier_call_chain+0x50/0x90 [ 49.534137][ T522] __netdev_upper_dev_unlink+0xd9/0x220 [ 49.534286][ T522] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 49.534465][ T522] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 49.534614][ T522] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 49.534799][ T522] ? rtnl_is_locked+0x15/0x20 [ 49.534947][ T522] netdev_upper_dev_unlink+0x71/0xa0 [ 49.535101][ T522] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 49.535288][ T522] ? netconsole_netdev_event+0x2c1/0x620 [ 49.535436][ T522] ? mutex_is_locked+0x1c/0x60 [ 49.535588][ T522] ? rtnl_is_locked+0x15/0x20 [ 49.535734][ T522] ? netdev_master_upper_dev_get+0x13/0x120 [ 49.535919][ T522] vrf_device_event+0x78/0xe0 [vrf] [ 49.536075][ T522] notifier_call_chain+0xcd/0x150 [ 49.536222][ T522] blocking_notifier_call_chain+0x66/0x90 [ 49.536370][ T522] unregister_netdevice_many_notify+0xa7b/0x1580 [ 49.536554][ T522] ? hlock_class+0x4e/0x130 [ 49.536703][ T522] ? mark_lock+0x38/0x3e0 [ 49.536819][ T522] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 49.537002][ T522] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 49.537193][ T522] ? kfree+0xf3/0x330 [ 49.537307][ T522] ? vlan_vid_del+0x310/0x5e0 [ 49.537459][ T522] ? vlan_vid_del+0x310/0x5e0 [ 49.537608][ T522] rtnl_dellink+0x348/0xa40 [ 49.537757][ T522] ? __pfx_rtnl_dellink+0x10/0x10 [ 49.537917][ T522] ? find_held_lock+0x2c/0x110 [ 49.538068][ T522] ? __lock_release+0x103/0x460 [ 49.538216][ T522] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 49.538370][ T522] ? __pfx___lock_release+0x10/0x10 [ 49.538517][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 49.538664][ T522] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 49.538828][ T522] ? __pfx_rtnl_dellink+0x10/0x10 [ 49.538995][ T522] rtnetlink_rcv_msg+0x712/0xc10 [ 49.539153][ T522] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 49.539311][ T522] ? hlock_class+0x4e/0x130 [ 49.539473][ T522] ? mark_lock+0x38/0x3e0 [ 49.539596][ T522] ? __lock_acquire+0xb9a/0x1680 [ 49.539755][ T522] netlink_rcv_skb+0x130/0x360 [ 49.539914][ T522] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 49.540071][ T522] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 49.540234][ T522] ? netlink_deliver_tap+0x13e/0x340 [ 49.540395][ T522] ? netlink_deliver_tap+0xc3/0x340 [ 49.540558][ T522] netlink_unicast+0x44b/0x710 [ 49.540717][ T522] ? __pfx_netlink_unicast+0x10/0x10 [ 49.540874][ T522] ? find_held_lock+0x2c/0x110 [ 49.541034][ T522] netlink_sendmsg+0x723/0xbe0 [ 49.541192][ T522] ? __pfx_netlink_sendmsg+0x10/0x10 [ 49.541350][ T522] ____sys_sendmsg+0x7ac/0xa10 [ 49.541512][ T522] ? __pfx_____sys_sendmsg+0x10/0x10 [ 49.541674][ T522] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 49.541874][ T522] ___sys_sendmsg+0xee/0x170 [ 49.542035][ T522] ? __pfx____sys_sendmsg+0x10/0x10 [ 49.542193][ T522] ? kasan_save_stack+0x34/0x50 [ 49.542353][ T522] ? kasan_save_stack+0x24/0x50 [ 49.542508][ T522] ? __kasan_record_aux_stack+0x8e/0xa0 [ 49.542667][ T522] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 49.542868][ T522] ? __x64_sys_close+0x7c/0xd0 [ 49.543025][ T522] ? do_syscall_64+0xc1/0x1d0 [ 49.543183][ T522] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 49.543415][ T522] ? __lock_acquire+0xb9a/0x1680 [ 49.543577][ T522] ? find_held_lock+0x2c/0x110 [ 49.543740][ T522] ? __lock_release+0x103/0x460 [ 49.543898][ T522] ? __virt_addr_valid+0x22b/0x430 [ 49.544064][ T522] ? __pfx___lock_release+0x10/0x10 [ 49.544233][ T522] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 49.544394][ T522] __sys_sendmsg+0x109/0x1a0 [ 49.544556][ T522] ? __pfx___sys_sendmsg+0x10/0x10 [ 49.544717][ T522] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 49.544934][ T522] do_syscall_64+0xc1/0x1d0 [ 49.545098][ T522] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 49.545300][ T522] RIP: 0033:0x7f3033b749a7 [ 49.545478][ 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 [ 49.546046][ T522] RSP: 002b:00007fffbad075d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 49.546291][ T522] RAX: ffffffffffffffda RBX: 00007fffbad07d00 RCX: 00007f3033b749a7 [ 49.546537][ T522] RDX: 0000000000000000 RSI: 00007fffbad07640 RDI: 0000000000000005 [ 49.546777][ T522] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 49.547014][ T522] R10: 00007f3033a32ef8 R11: 0000000000000246 R12: 0000000000000002 [ 49.547258][ T522] R13: 00000000677953f5 R14: 0000000000498600 R15: 0000000000000000 [ 49.547511][ T522]