[ 10.896111][ T249] ip (249) used greatest stack depth: 23248 bytes left [ 15.790355][ T331] 8021q: 802.1Q VLAN Support v1.8 [ 16.228153][ T337] gre: GRE over IPv4 demultiplexor driver [ 16.242794][ T337] ip_gre: GRE over IPv4 tunneling driver [ 29.596172][ T440] [ 29.596337][ T440] ============================================ [ 29.596532][ T440] WARNING: possible recursive locking detected [ 29.596718][ T440] 6.13.0-rc5-virtme #1 Not tainted [ 29.596867][ T440] -------------------------------------------- [ 29.597052][ T440] ip/440 is trying to acquire lock: [ 29.597205][ T440] ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.597517][ T440] [ 29.597517][ T440] but task is already holding lock: [ 29.597735][ T440] ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.598026][ T440] [ 29.598026][ T440] other info that might help us debug this: [ 29.598238][ T440] Possible unsafe locking scenario: [ 29.598238][ T440] [ 29.598453][ T440] CPU0 [ 29.598565][ T440] ---- [ 29.598699][ T440] lock((netdev_chain).rwsem); [ 29.598843][ T440] lock((netdev_chain).rwsem); [ 29.598991][ T440] [ 29.598991][ T440] *** DEADLOCK *** [ 29.598991][ T440] [ 29.599214][ T440] May be due to missing lock nesting notation [ 29.599214][ T440] [ 29.599429][ T440] 2 locks held by ip/440: [ 29.599542][ T440] #0: ffffffff8e3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.599813][ T440] #1: ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.600115][ T440] [ 29.600115][ T440] stack backtrace: [ 29.600294][ T440] CPU: 2 UID: 0 PID: 440 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.600521][ T440] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.600725][ T440] Call Trace: [ 29.600848][ T440] [ 29.600931][ T440] dump_stack_lvl+0x82/0xd0 [ 29.601095][ T440] print_deadlock_bug+0x40a/0x650 [ 29.601257][ T440] validate_chain+0x5bf/0xae0 [ 29.601410][ T440] ? __pfx_validate_chain+0x10/0x10 [ 29.601561][ T440] ? hlock_class+0x4e/0x130 [ 29.601712][ T440] ? mark_lock+0x38/0x3e0 [ 29.601824][ T440] __lock_acquire+0xb9a/0x1680 [ 29.601971][ T440] lock_acquire.part.0+0xeb/0x330 [ 29.602116][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.602297][ T440] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.602481][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.602634][ T440] ? trace_lock_acquire+0x14c/0x1f0 [ 29.602787][ T440] ? lock_acquire+0x32/0xc0 [ 29.602932][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.603113][ T440] down_read+0x9f/0x340 [ 29.603224][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 29.603404][ T440] ? __pfx_down_read+0x10/0x10 [ 29.603557][ T440] ? __lock_release+0x103/0x460 [ 29.603718][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.603879][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.604045][ T440] blocking_notifier_call_chain+0x50/0x90 [ 29.604207][ T440] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.604370][ T440] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.604570][ T440] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.604732][ T440] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.604929][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.605100][ T440] netdev_upper_dev_unlink+0x71/0xa0 [ 29.605259][ T440] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.605455][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 29.605617][ T440] ? mutex_is_locked+0x1c/0x60 [ 29.605775][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.605936][ T440] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.606132][ T440] vrf_device_event+0x78/0xe0 [vrf] [ 29.606305][ T440] notifier_call_chain+0xcd/0x150 [ 29.606467][ T440] blocking_notifier_call_chain+0x66/0x90 [ 29.606634][ T440] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.606830][ T440] ? find_held_lock+0x2c/0x110 [ 29.606991][ T440] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.607187][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.607348][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.607510][ T440] ? rtnl_is_locked+0x15/0x20 [ 29.607670][ T440] ? unregister_netdevice_queue+0x70/0x410 [ 29.607867][ T440] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.608060][ T440] ? net_generic+0xbb/0x1f0 [ 29.608222][ T440] rtnl_dellink+0x348/0xa40 [ 29.608373][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.608545][ T440] ? find_held_lock+0x2c/0x110 [ 29.608726][ T440] ? __lock_release+0x103/0x460 [ 29.608887][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.609045][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.609203][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.609363][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.609522][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.609682][ T440] rtnetlink_rcv_msg+0x712/0xc10 [ 29.609846][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.610003][ T440] ? hlock_class+0x4e/0x130 [ 29.610182][ T440] ? mark_lock+0x38/0x3e0 [ 29.610305][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.610464][ T440] netlink_rcv_skb+0x130/0x360 [ 29.610630][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.610791][ T440] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.610957][ T440] ? netlink_deliver_tap+0x13e/0x340 [ 29.611137][ T440] ? netlink_deliver_tap+0xc3/0x340 [ 29.611298][ T440] netlink_unicast+0x44b/0x710 [ 29.611459][ T440] ? __pfx_netlink_unicast+0x10/0x10 [ 29.611618][ T440] ? find_held_lock+0x2c/0x110 [ 29.611795][ T440] netlink_sendmsg+0x723/0xbe0 [ 29.611953][ T440] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.612131][ T440] ____sys_sendmsg+0x7ac/0xa10 [ 29.612291][ T440] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.612450][ T440] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.612672][ T440] ___sys_sendmsg+0xee/0x170 [ 29.612833][ T440] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.612995][ T440] ? kasan_save_stack+0x34/0x50 [ 29.613171][ T440] ? kasan_save_stack+0x24/0x50 [ 29.613335][ T440] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.613498][ T440] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.613699][ T440] ? __x64_sys_close+0x7c/0xd0 [ 29.613873][ T440] ? do_syscall_64+0xc1/0x1d0 [ 29.614031][ T440] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.614232][ T440] ? __lock_acquire+0xb9a/0x1680 [ 29.614400][ T440] ? find_held_lock+0x2c/0x110 [ 29.614570][ T440] ? __lock_release+0x103/0x460 [ 29.614736][ T440] ? __virt_addr_valid+0x22b/0x430 [ 29.614898][ T440] ? __pfx___lock_release+0x10/0x10 [ 29.615042][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.615201][ T440] __sys_sendmsg+0x109/0x1a0 [ 29.615351][ T440] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.615495][ T440] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.615702][ T440] do_syscall_64+0xc1/0x1d0 [ 29.615847][ T440] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.616028][ T440] RIP: 0033:0x7f3c7ae2a9a7 [ 29.616198][ 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 [ 29.616715][ T440] RSP: 002b:00007ffc30286988 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.616958][ T440] RAX: ffffffffffffffda RBX: 00007ffc302870b0 RCX: 00007f3c7ae2a9a7 [ 29.617176][ T440] RDX: 0000000000000000 RSI: 00007ffc302869f0 RDI: 0000000000000005 [ 29.617415][ T440] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.617642][ T440] R10: 00007f3c7ace8ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.617897][ T440] R13: 0000000067790147 R14: 0000000000498600 R15: 0000000000000000 [ 29.618138][ T440]