[ 15.534822][ T331] 8021q: 802.1Q VLAN Support v1.8 [ 15.952241][ T337] gre: GRE over IPv4 demultiplexor driver [ 15.967136][ T337] ip_gre: GRE over IPv4 tunneling driver [ 16.151161][ T342] ip (342) used greatest stack depth: 24096 bytes left [ 29.395539][ T440] [ 29.395667][ T440] ============================================ [ 29.395856][ T440] WARNING: possible recursive locking detected [ 29.396035][ T440] 6.13.0-rc5-virtme #1 Not tainted [ 29.396187][ T440] -------------------------------------------- [ 29.396365][ T440] ip/440 is trying to acquire lock: [ 29.396509][ T440] ffffffffac9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.396812][ T440] [ 29.396812][ T440] but task is already holding lock: [ 29.397024][ T440] ffffffffac9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.397316][ T440] [ 29.397316][ T440] other info that might help us debug this: [ 29.397533][ T440] Possible unsafe locking scenario: [ 29.397533][ T440] [ 29.397747][ T440] CPU0 [ 29.397856][ T440] ---- [ 29.397967][ T440] lock((netdev_chain).rwsem); [ 29.398112][ T440] lock((netdev_chain).rwsem); [ 29.398255][ T440] [ 29.398255][ T440] *** DEADLOCK *** [ 29.398255][ T440] [ 29.398474][ T440] May be due to missing lock nesting notation [ 29.398474][ T440] [ 29.398688][ T440] 2 locks held by ip/440: [ 29.398799][ T440] #0: ffffffffac9e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.399066][ T440] #1: ffffffffac9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.399359][ T440] [ 29.399359][ T440] stack backtrace: [ 29.399541][ T440] CPU: 3 UID: 0 PID: 440 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.399765][ T440] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.399945][ T440] Call Trace: [ 29.400057][ T440] [ 29.400132][ T440] dump_stack_lvl+0x82/0xd0 [ 29.400283][ T440] print_deadlock_bug+0x40a/0x650 [ 29.400430][ T440] validate_chain+0x5bf/0xae0 [ 29.400575][ T440] ? __pfx_validate_chain+0x10/0x10 [ 29.400726][ T440] ? hlock_class+0x4e/0x130 [ 29.400871][ T440] ? mark_lock+0x38/0x3e0 [ 29.400982][ T440] __lock_acquire+0xb9a/0x1680 [ 29.401130][ T440] lock_acquire.part.0+0xeb/0x330 [ 29.401274][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.401455][ T440] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.401637][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.401787][ T440] ? trace_lock_acquire+0x14c/0x1f0 [ 29.401933][ T440] ? lock_acquire+0x32/0xc0 [ 29.402077][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.402263][ T440] down_read+0x9f/0x340 [ 29.402375][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.402557][ T440] ? __pfx_down_read+0x10/0x10 [ 29.402701][ T440] ? __lock_release+0x103/0x460 [ 29.402846][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.402995][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.403145][ T440] blocking_notifier_call_chain+0x50/0x90 [ 29.403290][ T440] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.403436][ T440] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.403615][ T440] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.403762][ T440] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.403948][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.404094][ T440] netdev_upper_dev_unlink+0x71/0xa0 [ 29.404239][ T440] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.404421][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.404567][ T440] ? mutex_is_locked+0x1c/0x60 [ 29.404713][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.404860][ T440] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.405044][ T440] vrf_device_event+0x78/0xe0 [vrf] [ 29.405193][ T440] notifier_call_chain+0xcd/0x150 [ 29.405340][ T440] blocking_notifier_call_chain+0x66/0x90 [ 29.405488][ T440] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.405670][ T440] ? find_held_lock+0x2c/0x110 [ 29.405816][ T440] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.406009][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.406156][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.406304][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.406450][ T440] ? unregister_netdevice_queue+0x70/0x410 [ 29.406632][ T440] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.406813][ T440] ? net_generic+0xbb/0x1f0 [ 29.406964][ T440] rtnl_dellink+0x348/0xa40 [ 29.407112][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.407274][ T440] ? find_held_lock+0x2c/0x110 [ 29.407419][ T440] ? __lock_release+0x103/0x460 [ 29.407564][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.407710][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.407856][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.408003][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.408153][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.408298][ T440] rtnetlink_rcv_msg+0x712/0xc10 [ 29.408444][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.408588][ T440] ? hlock_class+0x4e/0x130 [ 29.408733][ T440] ? mark_lock+0x38/0x3e0 [ 29.408844][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.408992][ T440] netlink_rcv_skb+0x130/0x360 [ 29.409137][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.409286][ T440] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.409434][ T440] ? netlink_deliver_tap+0x13e/0x340 [ 29.409583][ T440] ? netlink_deliver_tap+0xc3/0x340 [ 29.409732][ T440] netlink_unicast+0x44b/0x710 [ 29.409877][ T440] ? __pfx_netlink_unicast+0x10/0x10 [ 29.410021][ T440] ? find_held_lock+0x2c/0x110 [ 29.410169][ T440] netlink_sendmsg+0x723/0xbe0 [ 29.410319][ T440] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.410467][ T440] ____sys_sendmsg+0x7ac/0xa10 [ 29.410611][ T440] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.410758][ T440] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.410942][ T440] ___sys_sendmsg+0xee/0x170 [ 29.411088][ T440] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.411236][ T440] ? kasan_save_stack+0x34/0x50 [ 29.411388][ T440] ? kasan_save_stack+0x24/0x50 [ 29.411532][ T440] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.411677][ T440] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.411856][ T440] ? __x64_sys_close+0x7c/0xd0 [ 29.412003][ T440] ? do_syscall_64+0xc1/0x1d0 [ 29.412148][ T440] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.412350][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.412503][ T440] ? find_held_lock+0x2c/0x110 [ 29.412649][ T440] ? __lock_release+0x103/0x460 [ 29.412794][ T440] ? __virt_addr_valid+0x22b/0x430 [ 29.412941][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.413087][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.413233][ T440] __sys_sendmsg+0x109/0x1a0 [ 29.413377][ T440] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.413524][ T440] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.413709][ T440] do_syscall_64+0xc1/0x1d0 [ 29.413854][ T440] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.414033][ T440] RIP: 0033:0x7f45cb7059a7 [ 29.414186][ T440] 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 [ 29.414698][ T440] RSP: 002b:00007ffca768a978 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.414919][ T440] RAX: ffffffffffffffda RBX: 00007ffca768b0a0 RCX: 00007f45cb7059a7 [ 29.415140][ T440] RDX: 0000000000000000 RSI: 00007ffca768a9e0 RDI: 0000000000000005 [ 29.415358][ T440] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.415582][ T440] R10: 00007f45cb5c3ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.415800][ T440] R13: 0000000067792f79 R14: 0000000000498600 R15: 0000000000000000 [ 29.416023][ T440] [ 29.449401][ T440] ip (440) used greatest stack depth: 24008 bytes left