[ 81.223630][ T1057] 8021q: 802.1Q VLAN Support v1.8 [ 81.691591][ T1063] gre: GRE over IPv4 demultiplexor driver [ 81.706814][ T1063] ip_gre: GRE over IPv4 tunneling driver [ 82.000330][ T1072] ip (1072) used greatest stack depth: 23240 bytes left [ 95.195282][ T1168] [ 95.195471][ T1168] ============================================ [ 95.195685][ T1168] WARNING: possible recursive locking detected [ 95.195886][ T1168] 6.13.0-rc5-virtme #1 Not tainted [ 95.196050][ T1168] -------------------------------------------- [ 95.196255][ T1168] ip/1168 is trying to acquire lock: [ 95.196426][ T1168] ffffffff8efd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 95.196779][ T1168] [ 95.196779][ T1168] but task is already holding lock: [ 95.197022][ T1168] ffffffff8efd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 95.197344][ T1168] [ 95.197344][ T1168] other info that might help us debug this: [ 95.197589][ T1168] Possible unsafe locking scenario: [ 95.197589][ T1168] [ 95.197824][ T1168] CPU0 [ 95.197950][ T1168] ---- [ 95.198071][ T1168] lock((netdev_chain).rwsem); [ 95.198234][ T1168] lock((netdev_chain).rwsem); [ 95.198403][ T1168] [ 95.198403][ T1168] *** DEADLOCK *** [ 95.198403][ T1168] [ 95.198638][ T1168] May be due to missing lock nesting notation [ 95.198638][ T1168] [ 95.198873][ T1168] 2 locks held by ip/1168: [ 95.199039][ T1168] #0: ffffffff8efe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 95.199346][ T1168] #1: ffffffff8efd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 95.199672][ T1168] [ 95.199672][ T1168] stack backtrace: [ 95.199876][ T1168] CPU: 0 UID: 0 PID: 1168 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 95.200127][ T1168] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 95.200337][ T1168] Call Trace: [ 95.200467][ T1168] [ 95.200553][ T1168] dump_stack_lvl+0x82/0xd0 [ 95.200722][ T1168] print_deadlock_bug+0x40a/0x650 [ 95.200895][ T1168] validate_chain+0x5bf/0xae0 [ 95.201063][ T1168] ? __pfx_validate_chain+0x10/0x10 [ 95.201239][ T1168] ? hlock_class+0x4e/0x130 [ 95.201403][ T1168] ? mark_lock+0x38/0x3e0 [ 95.201527][ T1168] __lock_acquire+0xb9a/0x1680 [ 95.201693][ T1168] lock_acquire.part.0+0xeb/0x330 [ 95.201856][ T1168] ? blocking_notifier_call_chain+0x50/0x90 [ 95.202059][ T1168] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 95.202267][ T1168] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 95.202427][ T1168] ? trace_lock_acquire+0x14c/0x1f0 [ 95.202595][ T1168] ? lock_acquire+0x32/0xc0 [ 95.202758][ T1168] ? blocking_notifier_call_chain+0x50/0x90 [ 95.202959][ T1168] down_read+0x9f/0x340 [ 95.203084][ T1168] ? blocking_notifier_call_chain+0x50/0x90 [ 95.203285][ T1168] ? __pfx_down_read+0x10/0x10 [ 95.203445][ T1168] ? __lock_release+0x103/0x460 [ 95.203611][ T1168] ? netconsole_netdev_event+0x2c1/0x620 [ 95.203781][ T1168] ? __pfx___lock_release+0x10/0x10 [ 95.203943][ T1168] blocking_notifier_call_chain+0x50/0x90 [ 95.204107][ T1168] __netdev_upper_dev_unlink+0xd9/0x220 [ 95.204269][ T1168] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 95.204469][ T1168] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 95.204633][ T1168] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 95.204838][ T1168] ? rtnl_is_locked+0x15/0x20 [ 95.205002][ T1168] netdev_upper_dev_unlink+0x71/0xa0 [ 95.205161][ T1168] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 95.205362][ T1168] ? netconsole_netdev_event+0x2c1/0x620 [ 95.205530][ T1168] ? mutex_is_locked+0x1c/0x60 [ 95.205694][ T1168] ? rtnl_is_locked+0x15/0x20 [ 95.205854][ T1168] ? netdev_master_upper_dev_get+0x13/0x120 [ 95.206058][ T1168] vrf_device_event+0x78/0xe0 [vrf] [ 95.206223][ T1168] notifier_call_chain+0xcd/0x150 [ 95.206391][ T1168] blocking_notifier_call_chain+0x66/0x90 [ 95.206550][ T1168] unregister_netdevice_many_notify+0xa7b/0x1580 [ 95.206752][ T1168] ? find_held_lock+0x2c/0x110 [ 95.206914][ T1168] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 95.207113][ T1168] ? __pfx___lock_release+0x10/0x10 [ 95.207281][ T1168] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 95.207447][ T1168] ? rtnl_is_locked+0x15/0x20 [ 95.207608][ T1168] ? unregister_netdevice_queue+0x70/0x410 [ 95.207805][ T1168] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 95.208006][ T1168] ? net_generic+0xbb/0x1f0 [ 95.208170][ T1168] rtnl_dellink+0x348/0xa40 [ 95.208338][ T1168] ? __pfx_rtnl_dellink+0x10/0x10 [ 95.208524][ T1168] ? find_held_lock+0x2c/0x110 [ 95.208686][ T1168] ? __lock_release+0x103/0x460 [ 95.208846][ T1168] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 95.209050][ T1168] ? __pfx___lock_release+0x10/0x10 [ 95.209212][ T1168] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 95.209377][ T1168] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 95.209536][ T1168] ? __pfx_rtnl_dellink+0x10/0x10 [ 95.209706][ T1168] rtnetlink_rcv_msg+0x712/0xc10 [ 95.209869][ T1168] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 95.210033][ T1168] ? hlock_class+0x4e/0x130 [ 95.210193][ T1168] ? mark_lock+0x38/0x3e0 [ 95.210319][ T1168] ? __lock_acquire+0xb9a/0x1680 [ 95.210481][ T1168] netlink_rcv_skb+0x130/0x360 [ 95.210645][ T1168] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 95.210812][ T1168] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 95.210983][ T1168] ? netlink_deliver_tap+0x13e/0x340 [ 95.211146][ T1168] ? netlink_deliver_tap+0xc3/0x340 [ 95.211312][ T1168] netlink_unicast+0x44b/0x710 [ 95.211475][ T1168] ? __pfx_netlink_unicast+0x10/0x10 [ 95.211637][ T1168] ? find_held_lock+0x2c/0x110 [ 95.211802][ T1168] netlink_sendmsg+0x723/0xbe0 [ 95.211970][ T1168] ? __pfx_netlink_sendmsg+0x10/0x10 [ 95.212136][ T1168] ____sys_sendmsg+0x7ac/0xa10 [ 95.212298][ T1168] ? __pfx_____sys_sendmsg+0x10/0x10 [ 95.212459][ T1168] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 95.212667][ T1168] ___sys_sendmsg+0xee/0x170 [ 95.212827][ T1168] ? __pfx____sys_sendmsg+0x10/0x10 [ 95.212992][ T1168] ? kasan_save_stack+0x34/0x50 [ 95.213159][ T1168] ? kasan_save_stack+0x24/0x50 [ 95.213323][ T1168] ? __kasan_record_aux_stack+0x8e/0xa0 [ 95.213488][ T1168] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 95.213692][ T1168] ? __x64_sys_close+0x7c/0xd0 [ 95.213856][ T1168] ? do_syscall_64+0xc1/0x1d0 [ 95.214017][ T1168] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.214225][ T1168] ? __lock_acquire+0xb9a/0x1680 [ 95.214389][ T1168] ? find_held_lock+0x2c/0x110 [ 95.214560][ T1168] ? __lock_release+0x103/0x460 [ 95.214718][ T1168] ? __virt_addr_valid+0x22b/0x430 [ 95.214881][ T1168] ? __pfx___lock_release+0x10/0x10 [ 95.215042][ T1168] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 95.215205][ T1168] __sys_sendmsg+0x109/0x1a0 [ 95.215365][ T1168] ? __pfx___sys_sendmsg+0x10/0x10 [ 95.215526][ T1168] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 95.215741][ T1168] do_syscall_64+0xc1/0x1d0 [ 95.215904][ T1168] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 95.216105][ T1168] RIP: 0033:0x7f1f90c419a7 [ 95.216279][ T1168] 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 [ 95.216851][ T1168] RSP: 002b:00007ffe46c5c498 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 95.217097][ T1168] RAX: ffffffffffffffda RBX: 00007ffe46c5cbc0 RCX: 00007f1f90c419a7 [ 95.217341][ T1168] RDX: 0000000000000000 RSI: 00007ffe46c5c500 RDI: 0000000000000005 [ 95.217589][ T1168] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 95.217835][ T1168] R10: 00007f1f90affef8 R11: 0000000000000246 R12: 0000000000000002 [ 95.218076][ T1168] R13: 000000006779013e R14: 0000000000498600 R15: 0000000000000000 [ 95.218328][ T1168]