[ 11.709277][ T249] ip (249) used greatest stack depth: 23928 bytes left [ 15.561618][ T311] 8021q: 802.1Q VLAN Support v1.8 [ 16.415479][ T322] gre: GRE over IPv4 demultiplexor driver [ 16.437571][ T322] ip_gre: GRE over IPv4 tunneling driver [ 21.992155][ T388] GACT probability NOT on [ 88.491923][ T681] [ 88.492107][ T681] ============================================ [ 88.492317][ T681] WARNING: possible recursive locking detected [ 88.492520][ T681] 6.13.0-rc5-virtme #1 Not tainted [ 88.492686][ T681] -------------------------------------------- [ 88.492895][ T681] ip/681 is trying to acquire lock: [ 88.493064][ T681] ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.493402][ T681] [ 88.493402][ T681] but task is already holding lock: [ 88.493648][ T681] ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.493977][ T681] [ 88.493977][ T681] other info that might help us debug this: [ 88.494220][ T681] Possible unsafe locking scenario: [ 88.494220][ T681] [ 88.494469][ T681] CPU0 [ 88.494595][ T681] ---- [ 88.494721][ T681] lock((netdev_chain).rwsem); [ 88.494892][ T681] lock((netdev_chain).rwsem); [ 88.495075][ T681] [ 88.495075][ T681] *** DEADLOCK *** [ 88.495075][ T681] [ 88.495324][ T681] May be due to missing lock nesting notation [ 88.495324][ T681] [ 88.495570][ T681] 2 locks held by ip/681: [ 88.495707][ T681] #0: ffffffff9c5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 88.496015][ T681] #1: ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.496349][ T681] [ 88.496349][ T681] stack backtrace: [ 88.496557][ T681] CPU: 3 UID: 0 PID: 681 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 88.496912][ T681] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 88.497247][ T681] Call Trace: [ 88.497450][ T681] [ 88.497583][ T681] dump_stack_lvl+0x82/0xd0 [ 88.497852][ T681] print_deadlock_bug+0x40a/0x650 [ 88.498114][ T681] validate_chain+0x5bf/0xae0 [ 88.498374][ T681] ? __pfx_validate_chain+0x10/0x10 [ 88.498620][ T681] ? hlock_class+0x4e/0x130 [ 88.498874][ T681] ? mark_lock+0x38/0x3e0 [ 88.499074][ T681] __lock_acquire+0xb9a/0x1680 [ 88.499333][ T681] lock_acquire.part.0+0xeb/0x330 [ 88.499584][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 88.499901][ T681] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 88.500219][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.500474][ T681] ? trace_lock_acquire+0x14c/0x1f0 [ 88.500713][ T681] ? lock_acquire+0x32/0xc0 [ 88.500961][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 88.501256][ T681] down_read+0x9f/0x340 [ 88.501441][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 88.501737][ T681] ? __pfx_down_read+0x10/0x10 [ 88.501963][ T681] ? __lock_release+0x103/0x460 [ 88.502176][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 88.502415][ T681] ? __pfx___lock_release+0x10/0x10 [ 88.502661][ T681] blocking_notifier_call_chain+0x50/0x90 [ 88.502893][ T681] __netdev_upper_dev_unlink+0xd9/0x220 [ 88.503125][ T681] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 88.503423][ T681] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 88.503664][ T681] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 88.503982][ T681] ? rtnl_is_locked+0x15/0x20 [ 88.504255][ T681] netdev_upper_dev_unlink+0x71/0xa0 [ 88.504510][ T681] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 88.504819][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 88.505089][ T681] ? mutex_is_locked+0x1c/0x60 [ 88.505338][ T681] ? rtnl_is_locked+0x15/0x20 [ 88.505590][ T681] ? netdev_master_upper_dev_get+0x13/0x120 [ 88.505888][ T681] vrf_device_event+0x78/0xe0 [vrf] [ 88.506149][ T681] notifier_call_chain+0xcd/0x150 [ 88.506393][ T681] blocking_notifier_call_chain+0x66/0x90 [ 88.506637][ T681] unregister_netdevice_many_notify+0xa7b/0x1580 [ 88.506935][ T681] ? hlock_class+0x4e/0x130 [ 88.507177][ T681] ? mark_lock+0x38/0x3e0 [ 88.507366][ T681] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 88.507674][ T681] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 88.507984][ T681] ? kfree+0xf3/0x330 [ 88.508166][ T681] ? vlan_vid_del+0x310/0x5e0 [ 88.508412][ T681] ? vlan_vid_del+0x310/0x5e0 [ 88.508650][ T681] rtnl_dellink+0x348/0xa40 [ 88.508888][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 88.509152][ T681] ? find_held_lock+0x2c/0x110 [ 88.509396][ T681] ? __lock_release+0x103/0x460 [ 88.509636][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 88.509892][ T681] ? __pfx___lock_release+0x10/0x10 [ 88.510133][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.510391][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 88.510645][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 88.510903][ T681] rtnetlink_rcv_msg+0x712/0xc10 [ 88.511160][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 88.511417][ T681] ? hlock_class+0x4e/0x130 [ 88.511684][ T681] ? mark_lock+0x38/0x3e0 [ 88.511880][ T681] ? __lock_acquire+0xb9a/0x1680 [ 88.512141][ T681] netlink_rcv_skb+0x130/0x360 [ 88.512393][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 88.512651][ T681] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 88.512918][ T681] ? netlink_deliver_tap+0x13e/0x340 [ 88.513176][ T681] ? netlink_deliver_tap+0xc3/0x340 [ 88.513442][ T681] netlink_unicast+0x44b/0x710 [ 88.513704][ T681] ? __pfx_netlink_unicast+0x10/0x10 [ 88.513963][ T681] ? find_held_lock+0x2c/0x110 [ 88.514223][ T681] netlink_sendmsg+0x723/0xbe0 [ 88.514483][ T681] ? __pfx_netlink_sendmsg+0x10/0x10 [ 88.514743][ T681] ____sys_sendmsg+0x7ac/0xa10 [ 88.515002][ T681] ? __pfx_____sys_sendmsg+0x10/0x10 [ 88.515297][ T681] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 88.515521][ T681] ___sys_sendmsg+0xee/0x170 [ 88.515691][ T681] ? __pfx____sys_sendmsg+0x10/0x10 [ 88.515861][ T681] ? kasan_save_stack+0x34/0x50 [ 88.516036][ T681] ? kasan_save_stack+0x24/0x50 [ 88.516203][ T681] ? __kasan_record_aux_stack+0x8e/0xa0 [ 88.516389][ T681] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 88.516617][ T681] ? __x64_sys_close+0x7c/0xd0 [ 88.516789][ T681] ? do_syscall_64+0xc1/0x1d0 [ 88.516962][ T681] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.517169][ T681] ? __lock_acquire+0xb9a/0x1680 [ 88.517354][ T681] ? find_held_lock+0x2c/0x110 [ 88.517559][ T681] ? __lock_release+0x103/0x460 [ 88.517733][ T681] ? __virt_addr_valid+0x22b/0x430 [ 88.517905][ T681] ? __pfx___lock_release+0x10/0x10 [ 88.518088][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.518257][ T681] __sys_sendmsg+0x109/0x1a0 [ 88.518424][ T681] ? __pfx___sys_sendmsg+0x10/0x10 [ 88.518606][ T681] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 88.518832][ T681] do_syscall_64+0xc1/0x1d0 [ 88.519008][ T681] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.519225][ T681] RIP: 0033:0x7fdc7521d9a7 [ 88.519414][ T681] 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 [ 88.520013][ T681] RSP: 002b:00007ffcb1154928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 88.520283][ T681] RAX: ffffffffffffffda RBX: 00007ffcb1155050 RCX: 00007fdc7521d9a7 [ 88.520547][ T681] RDX: 0000000000000000 RSI: 00007ffcb1154990 RDI: 0000000000000005 [ 88.520805][ T681] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 88.521073][ T681] R10: 00007fdc750dbef8 R11: 0000000000000246 R12: 0000000000000002 [ 88.521325][ T681] R13: 0000000067795316 R14: 0000000000498600 R15: 0000000000000000 [ 88.521598][ T681]