[ 11.574471][ T248] ip (248) used greatest stack depth: 23312 bytes left [ 15.425742][ T309] 8021q: 802.1Q VLAN Support v1.8 [ 16.278753][ T320] gre: GRE over IPv4 demultiplexor driver [ 16.297292][ T320] ip_gre: GRE over IPv4 tunneling driver [ 21.298983][ T386] GACT probability NOT on [ 86.640114][ T679] [ 86.640279][ T679] ============================================ [ 86.640483][ T679] WARNING: possible recursive locking detected [ 86.640685][ T679] 6.13.0-rc5-virtme #1 Not tainted [ 86.640842][ T679] -------------------------------------------- [ 86.641036][ T679] ip/679 is trying to acquire lock: [ 86.641199][ T679] ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.641500][ T679] [ 86.641500][ T679] but task is already holding lock: [ 86.641710][ T679] ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.642011][ T679] [ 86.642011][ T679] other info that might help us debug this: [ 86.642243][ T679] Possible unsafe locking scenario: [ 86.642243][ T679] [ 86.642455][ T679] CPU0 [ 86.642573][ T679] ---- [ 86.642684][ T679] lock((netdev_chain).rwsem); [ 86.642830][ T679] lock((netdev_chain).rwsem); [ 86.642984][ T679] [ 86.642984][ T679] *** DEADLOCK *** [ 86.642984][ T679] [ 86.643211][ T679] May be due to missing lock nesting notation [ 86.643211][ T679] [ 86.643424][ T679] 2 locks held by ip/679: [ 86.643536][ T679] #0: ffffffff9c5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 86.643809][ T679] #1: ffffffff9c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.644157][ T679] [ 86.644157][ T679] stack backtrace: [ 86.644353][ T679] CPU: 3 UID: 0 PID: 679 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 86.644570][ T679] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 86.644754][ T679] Call Trace: [ 86.644864][ T679] [ 86.644940][ T679] dump_stack_lvl+0x82/0xd0 [ 86.645097][ T679] print_deadlock_bug+0x40a/0x650 [ 86.645250][ T679] validate_chain+0x5bf/0xae0 [ 86.645398][ T679] ? __pfx_validate_chain+0x10/0x10 [ 86.645546][ T679] ? hlock_class+0x4e/0x130 [ 86.645690][ T679] ? mark_lock+0x38/0x3e0 [ 86.645802][ T679] __lock_acquire+0xb9a/0x1680 [ 86.645951][ T679] lock_acquire.part.0+0xeb/0x330 [ 86.646098][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 86.646291][ T679] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 86.646473][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.646618][ T679] ? trace_lock_acquire+0x14c/0x1f0 [ 86.646766][ T679] ? lock_acquire+0x32/0xc0 [ 86.646909][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 86.647109][ T679] down_read+0x9f/0x340 [ 86.647223][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 86.647408][ T679] ? __pfx_down_read+0x10/0x10 [ 86.647551][ T679] ? __lock_release+0x103/0x460 [ 86.647699][ T679] ? netconsole_netdev_event+0x2c1/0x620 [ 86.647845][ T679] ? __pfx___lock_release+0x10/0x10 [ 86.647993][ T679] blocking_notifier_call_chain+0x50/0x90 [ 86.648144][ T679] __netdev_upper_dev_unlink+0xd9/0x220 [ 86.648306][ T679] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 86.648495][ T679] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 86.648642][ T679] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 86.648823][ T679] ? rtnl_is_locked+0x15/0x20 [ 86.648973][ T679] netdev_upper_dev_unlink+0x71/0xa0 [ 86.649119][ T679] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 86.649299][ T679] ? netconsole_netdev_event+0x2c1/0x620 [ 86.649450][ T679] ? mutex_is_locked+0x1c/0x60 [ 86.649597][ T679] ? rtnl_is_locked+0x15/0x20 [ 86.649742][ T679] ? netdev_master_upper_dev_get+0x13/0x120 [ 86.649921][ T679] vrf_device_event+0x78/0xe0 [vrf] [ 86.650073][ T679] notifier_call_chain+0xcd/0x150 [ 86.650222][ T679] blocking_notifier_call_chain+0x66/0x90 [ 86.650369][ T679] unregister_netdevice_many_notify+0xa7b/0x1580 [ 86.650554][ T679] ? hlock_class+0x4e/0x130 [ 86.650702][ T679] ? mark_lock+0x38/0x3e0 [ 86.650814][ T679] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 86.650997][ T679] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 86.651186][ T679] ? kfree+0xf3/0x330 [ 86.651301][ T679] ? vlan_vid_del+0x310/0x5e0 [ 86.651452][ T679] ? vlan_vid_del+0x310/0x5e0 [ 86.651601][ T679] rtnl_dellink+0x348/0xa40 [ 86.651748][ T679] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.651910][ T679] ? find_held_lock+0x2c/0x110 [ 86.652060][ T679] ? __lock_release+0x103/0x460 [ 86.652210][ T679] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.652357][ T679] ? __pfx___lock_release+0x10/0x10 [ 86.652504][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.652651][ T679] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.652800][ T679] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.652947][ T679] rtnetlink_rcv_msg+0x712/0xc10 [ 86.653097][ T679] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.653247][ T679] ? hlock_class+0x4e/0x130 [ 86.653392][ T679] ? mark_lock+0x38/0x3e0 [ 86.653503][ T679] ? __lock_acquire+0xb9a/0x1680 [ 86.653649][ T679] netlink_rcv_skb+0x130/0x360 [ 86.653802][ T679] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.653949][ T679] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 86.654100][ T679] ? netlink_deliver_tap+0x13e/0x340 [ 86.654251][ T679] ? netlink_deliver_tap+0xc3/0x340 [ 86.654400][ T679] netlink_unicast+0x44b/0x710 [ 86.654546][ T679] ? __pfx_netlink_unicast+0x10/0x10 [ 86.654693][ T679] ? find_held_lock+0x2c/0x110 [ 86.654843][ T679] netlink_sendmsg+0x723/0xbe0 [ 86.654990][ T679] ? __pfx_netlink_sendmsg+0x10/0x10 [ 86.655142][ T679] ____sys_sendmsg+0x7ac/0xa10 [ 86.655290][ T679] ? __pfx_____sys_sendmsg+0x10/0x10 [ 86.655440][ T679] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 86.655626][ T679] ___sys_sendmsg+0xee/0x170 [ 86.655772][ T679] ? __pfx____sys_sendmsg+0x10/0x10 [ 86.655926][ T679] ? kasan_save_stack+0x34/0x50 [ 86.656077][ T679] ? kasan_save_stack+0x24/0x50 [ 86.656235][ T679] ? __kasan_record_aux_stack+0x8e/0xa0 [ 86.656385][ T679] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 86.656569][ T679] ? __x64_sys_close+0x7c/0xd0 [ 86.656718][ T679] ? do_syscall_64+0xc1/0x1d0 [ 86.656866][ T679] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.657072][ T679] ? __lock_acquire+0xb9a/0x1680 [ 86.657222][ T679] ? find_held_lock+0x2c/0x110 [ 86.657368][ T679] ? __lock_release+0x103/0x460 [ 86.657518][ T679] ? __virt_addr_valid+0x22b/0x430 [ 86.657669][ T679] ? __pfx___lock_release+0x10/0x10 [ 86.657816][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.657965][ T679] __sys_sendmsg+0x109/0x1a0 [ 86.658112][ T679] ? __pfx___sys_sendmsg+0x10/0x10 [ 86.658262][ T679] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 86.658451][ T679] do_syscall_64+0xc1/0x1d0 [ 86.658595][ T679] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.658776][ T679] RIP: 0033:0x7fbfff44f9a7 [ 86.658930][ T679] 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 [ 86.659445][ T679] RSP: 002b:00007ffca3dbbd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 86.659668][ T679] RAX: ffffffffffffffda RBX: 00007ffca3dbc450 RCX: 00007fbfff44f9a7 [ 86.659885][ T679] RDX: 0000000000000000 RSI: 00007ffca3dbbd90 RDI: 0000000000000005 [ 86.660104][ T679] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 86.660330][ T679] R10: 00007fbfff30def8 R11: 0000000000000246 R12: 0000000000000002 [ 86.660546][ T679] R13: 000000006778ffe4 R14: 0000000000498600 R15: 0000000000000000 [ 86.660768][ T679]