[ 15.774622][ T332] 8021q: 802.1Q VLAN Support v1.8 [ 16.253148][ T338] gre: GRE over IPv4 demultiplexor driver [ 16.274299][ T338] ip_gre: GRE over IPv4 tunneling driver [ 18.942435][ T375] ip (375) used greatest stack depth: 24016 bytes left [ 29.786757][ T440] [ 29.786896][ T440] ============================================ [ 29.787086][ T440] WARNING: possible recursive locking detected [ 29.787273][ T440] 6.13.0-rc5-virtme #1 Not tainted [ 29.787429][ T440] -------------------------------------------- [ 29.787609][ T440] ip/440 is trying to acquire lock: [ 29.787757][ T440] ffffffff8d7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.788058][ T440] [ 29.788058][ T440] but task is already holding lock: [ 29.788280][ T440] ffffffff8d7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.788575][ T440] [ 29.788575][ T440] other info that might help us debug this: [ 29.788796][ T440] Possible unsafe locking scenario: [ 29.788796][ T440] [ 29.789013][ T440] CPU0 [ 29.789121][ T440] ---- [ 29.789242][ T440] lock((netdev_chain).rwsem); [ 29.789395][ T440] lock((netdev_chain).rwsem); [ 29.789552][ T440] [ 29.789552][ T440] *** DEADLOCK *** [ 29.789552][ T440] [ 29.789769][ T440] May be due to missing lock nesting notation [ 29.789769][ T440] [ 29.789986][ T440] 2 locks held by ip/440: [ 29.790097][ T440] #0: ffffffff8d7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.790367][ T440] #1: ffffffff8d7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.790667][ T440] [ 29.790667][ T440] stack backtrace: [ 29.790853][ T440] CPU: 0 UID: 0 PID: 440 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.791078][ T440] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.791268][ T440] Call Trace: [ 29.791381][ T440] [ 29.791458][ T440] dump_stack_lvl+0x82/0xd0 [ 29.791616][ T440] print_deadlock_bug+0x40a/0x650 [ 29.791769][ T440] validate_chain+0x5bf/0xae0 [ 29.791920][ T440] ? __pfx_validate_chain+0x10/0x10 [ 29.792069][ T440] ? hlock_class+0x4e/0x130 [ 29.792218][ T440] ? mark_lock+0x38/0x3e0 [ 29.792333][ T440] __lock_acquire+0xb9a/0x1680 [ 29.792482][ T440] lock_acquire.part.0+0xeb/0x330 [ 29.792627][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.792811][ T440] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.792995][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.793147][ T440] ? trace_lock_acquire+0x14c/0x1f0 [ 29.793292][ T440] ? lock_acquire+0x32/0xc0 [ 29.793437][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.793624][ T440] down_read+0x9f/0x340 [ 29.793738][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.793917][ T440] ? __pfx_down_read+0x10/0x10 [ 29.794067][ T440] ? __lock_release+0x103/0x460 [ 29.794218][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.794366][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.794513][ T440] blocking_notifier_call_chain+0x50/0x90 [ 29.794660][ T440] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.794807][ T440] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.794989][ T440] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.795140][ T440] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.795321][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.795469][ T440] netdev_upper_dev_unlink+0x71/0xa0 [ 29.795615][ T440] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.795794][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.795942][ T440] ? mutex_is_locked+0x1c/0x60 [ 29.796086][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.796237][ T440] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.796420][ T440] vrf_device_event+0x78/0xe0 [vrf] [ 29.796570][ T440] notifier_call_chain+0xcd/0x150 [ 29.796718][ T440] blocking_notifier_call_chain+0x66/0x90 [ 29.796864][ T440] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.797049][ T440] ? find_held_lock+0x2c/0x110 [ 29.797203][ T440] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.797389][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.797536][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.797686][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.797832][ T440] ? unregister_netdevice_queue+0x70/0x410 [ 29.798012][ T440] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.798192][ T440] ? net_generic+0xbb/0x1f0 [ 29.798353][ T440] rtnl_dellink+0x348/0xa40 [ 29.798500][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.798661][ T440] ? find_held_lock+0x2c/0x110 [ 29.798810][ T440] ? __lock_release+0x103/0x460 [ 29.798957][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.799109][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.799271][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.799426][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.799580][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.799730][ T440] rtnetlink_rcv_msg+0x712/0xc10 [ 29.799876][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.800024][ T440] ? hlock_class+0x4e/0x130 [ 29.800171][ T440] ? mark_lock+0x38/0x3e0 [ 29.800283][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.800433][ T440] netlink_rcv_skb+0x130/0x360 [ 29.800587][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.800736][ T440] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.800886][ T440] ? netlink_deliver_tap+0x13e/0x340 [ 29.801034][ T440] ? netlink_deliver_tap+0xc3/0x340 [ 29.801183][ T440] netlink_unicast+0x44b/0x710 [ 29.801330][ T440] ? __pfx_netlink_unicast+0x10/0x10 [ 29.801481][ T440] ? find_held_lock+0x2c/0x110 [ 29.801635][ T440] netlink_sendmsg+0x723/0xbe0 [ 29.801782][ T440] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.801931][ T440] ____sys_sendmsg+0x7ac/0xa10 [ 29.802079][ T440] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.802223][ T440] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.802409][ T440] ___sys_sendmsg+0xee/0x170 [ 29.802557][ T440] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.802705][ T440] ? kasan_save_stack+0x34/0x50 [ 29.802852][ T440] ? kasan_save_stack+0x24/0x50 [ 29.802999][ T440] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.803147][ T440] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.803330][ T440] ? __x64_sys_close+0x7c/0xd0 [ 29.803481][ T440] ? do_syscall_64+0xc1/0x1d0 [ 29.803628][ T440] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.803820][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.803968][ T440] ? find_held_lock+0x2c/0x110 [ 29.804114][ T440] ? __lock_release+0x103/0x460 [ 29.804264][ T440] ? __virt_addr_valid+0x22b/0x430 [ 29.804411][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.804556][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.804708][ T440] __sys_sendmsg+0x109/0x1a0 [ 29.804854][ T440] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.805000][ T440] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.805186][ T440] do_syscall_64+0xc1/0x1d0 [ 29.805335][ T440] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.805516][ T440] RIP: 0033:0x7fd0752a69a7 [ 29.805668][ 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 [ 29.806184][ T440] RSP: 002b:00007ffdc34cc3e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.806405][ T440] RAX: ffffffffffffffda RBX: 00007ffdc34ccb10 RCX: 00007fd0752a69a7 [ 29.806629][ T440] RDX: 0000000000000000 RSI: 00007ffdc34cc450 RDI: 0000000000000005 [ 29.806847][ T440] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.807071][ T440] R10: 00007fd075164ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.807290][ T440] R13: 0000000067795817 R14: 0000000000498600 R15: 0000000000000000 [ 29.807517][ T440]