[ 10.596252][ T250] ip (250) used greatest stack depth: 23912 bytes left [ 15.949554][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 16.290776][ T342] gre: GRE over IPv4 demultiplexor driver [ 16.338864][ T342] ip6_gre: GRE over IPv6 tunneling driver [ 18.322930][ T373] ip (373) used greatest stack depth: 22904 bytes left [ 25.541449][ T419] GACT probability NOT on [ 42.096939][ T636] [ 42.097178][ T636] ============================================ [ 42.097463][ T636] WARNING: possible recursive locking detected [ 42.097742][ T636] 6.13.0-rc5-virtme #1 Not tainted [ 42.097970][ T636] -------------------------------------------- [ 42.098248][ T636] ip/636 is trying to acquire lock: [ 42.098514][ T636] ffffffffa67d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.098986][ T636] [ 42.098986][ T636] but task is already holding lock: [ 42.099317][ T636] ffffffffa67d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.099777][ T636] [ 42.099777][ T636] other info that might help us debug this: [ 42.100115][ T636] Possible unsafe locking scenario: [ 42.100115][ T636] [ 42.100435][ T636] CPU0 [ 42.100604][ T636] ---- [ 42.100767][ T636] lock((netdev_chain).rwsem); [ 42.100985][ T636] lock((netdev_chain).rwsem); [ 42.101208][ T636] [ 42.101208][ T636] *** DEADLOCK *** [ 42.101208][ T636] [ 42.101536][ T636] May be due to missing lock nesting notation [ 42.101536][ T636] [ 42.101847][ T636] 2 locks held by ip/636: [ 42.102009][ T636] #0: ffffffffa67e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 42.102404][ T636] #1: ffffffffa67d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.102860][ T636] [ 42.102860][ T636] stack backtrace: [ 42.103146][ T636] CPU: 1 UID: 0 PID: 636 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 42.103450][ T636] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.103727][ T636] Call Trace: [ 42.103908][ T636] [ 42.104034][ T636] dump_stack_lvl+0x82/0xd0 [ 42.104286][ T636] print_deadlock_bug+0x40a/0x650 [ 42.104540][ T636] validate_chain+0x5bf/0xae0 [ 42.104800][ T636] ? __pfx_validate_chain+0x10/0x10 [ 42.105020][ T636] ? hlock_class+0x4e/0x130 [ 42.105282][ T636] ? mark_lock+0x38/0x3e0 [ 42.105480][ T636] __lock_acquire+0xb9a/0x1680 [ 42.105733][ T636] lock_acquire.part.0+0xeb/0x330 [ 42.105978][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 42.106289][ T636] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 42.106611][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.106857][ T636] ? trace_lock_acquire+0x14c/0x1f0 [ 42.107084][ T636] ? lock_acquire+0x32/0xc0 [ 42.107264][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 42.107581][ T636] down_read+0x9f/0x340 [ 42.107769][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 42.108073][ T636] ? __pfx_down_read+0x10/0x10 [ 42.108326][ T636] ? __lock_release+0x103/0x460 [ 42.108578][ T636] ? netconsole_netdev_event+0x2c1/0x620 [ 42.108832][ T636] ? __pfx___lock_release+0x10/0x10 [ 42.109077][ T636] blocking_notifier_call_chain+0x50/0x90 [ 42.109325][ T636] __netdev_upper_dev_unlink+0xd9/0x220 [ 42.109578][ T636] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 42.109886][ T636] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 42.110101][ T636] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 42.110322][ T636] ? rtnl_is_locked+0x15/0x20 [ 42.110547][ T636] netdev_upper_dev_unlink+0x71/0xa0 [ 42.110781][ T636] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 42.111069][ T636] ? netconsole_netdev_event+0x2c1/0x620 [ 42.111306][ T636] ? mutex_is_locked+0x1c/0x60 [ 42.111521][ T636] ? rtnl_is_locked+0x15/0x20 [ 42.111759][ T636] ? netdev_master_upper_dev_get+0x13/0x120 [ 42.112058][ T636] vrf_device_event+0x78/0xe0 [vrf] [ 42.112291][ T636] notifier_call_chain+0xcd/0x150 [ 42.112532][ T636] blocking_notifier_call_chain+0x66/0x90 [ 42.112763][ T636] unregister_netdevice_many_notify+0xa7b/0x1580 [ 42.113047][ T636] ? __lock_release+0x103/0x460 [ 42.113282][ T636] ? __pfx___lock_release+0x10/0x10 [ 42.113522][ T636] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 42.113804][ T636] ? hlock_class+0x4e/0x130 [ 42.114039][ T636] ? mark_held_locks+0x9e/0xe0 [ 42.114274][ T636] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 42.114525][ T636] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 42.114811][ T636] rtnl_dellink+0x348/0xa40 [ 42.115049][ T636] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.115379][ T636] ? find_held_lock+0x2c/0x110 [ 42.115546][ T636] ? __lock_release+0x103/0x460 [ 42.115694][ T636] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.115842][ T636] ? __pfx___lock_release+0x10/0x10 [ 42.115990][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.116138][ T636] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.116291][ T636] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.116439][ T636] rtnetlink_rcv_msg+0x712/0xc10 [ 42.116586][ T636] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.116734][ T636] ? hlock_class+0x4e/0x130 [ 42.116880][ T636] ? mark_lock+0x38/0x3e0 [ 42.116994][ T636] ? __lock_acquire+0xb9a/0x1680 [ 42.117141][ T636] netlink_rcv_skb+0x130/0x360 [ 42.117288][ T636] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.117437][ T636] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 42.117591][ T636] ? netlink_deliver_tap+0x13e/0x340 [ 42.117741][ T636] ? netlink_deliver_tap+0xc3/0x340 [ 42.117889][ T636] netlink_unicast+0x44b/0x710 [ 42.118035][ T636] ? __pfx_netlink_unicast+0x10/0x10 [ 42.118180][ T636] ? find_held_lock+0x2c/0x110 [ 42.118331][ T636] netlink_sendmsg+0x723/0xbe0 [ 42.118482][ T636] ? __pfx_netlink_sendmsg+0x10/0x10 [ 42.118631][ T636] ____sys_sendmsg+0x7ac/0xa10 [ 42.118783][ T636] ? __pfx_____sys_sendmsg+0x10/0x10 [ 42.118931][ T636] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 42.119116][ T636] ___sys_sendmsg+0xee/0x170 [ 42.119267][ T636] ? __pfx____sys_sendmsg+0x10/0x10 [ 42.119469][ T636] ? kasan_save_stack+0x34/0x50 [ 42.119677][ T636] ? kasan_save_stack+0x24/0x50 [ 42.119827][ T636] ? __kasan_record_aux_stack+0x8e/0xa0 [ 42.119974][ T636] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 42.120158][ T636] ? __x64_sys_close+0x7c/0xd0 [ 42.120310][ T636] ? do_syscall_64+0xc1/0x1d0 [ 42.120457][ T636] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.120640][ T636] ? __lock_acquire+0xb9a/0x1680 [ 42.120804][ T636] ? find_held_lock+0x2c/0x110 [ 42.120951][ T636] ? __lock_release+0x103/0x460 [ 42.121098][ T636] ? __virt_addr_valid+0x22b/0x430 [ 42.121250][ T636] ? __pfx___lock_release+0x10/0x10 [ 42.121398][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.121548][ T636] __sys_sendmsg+0x109/0x1a0 [ 42.121695][ T636] ? __pfx___sys_sendmsg+0x10/0x10 [ 42.121845][ T636] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 42.122033][ T636] do_syscall_64+0xc1/0x1d0 [ 42.122182][ T636] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.122366][ T636] RIP: 0033:0x7fda36e789a7 [ 42.122522][ T636] 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 [ 42.123044][ T636] RSP: 002b:00007ffebeea4ee8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.123274][ T636] RAX: ffffffffffffffda RBX: 00007ffebeea5610 RCX: 00007fda36e789a7 [ 42.123495][ T636] RDX: 0000000000000000 RSI: 00007ffebeea4f50 RDI: 0000000000000005 [ 42.123715][ T636] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.123935][ T636] R10: 00007fda36d36ef8 R11: 0000000000000246 R12: 0000000000000002 [ 42.124155][ T636] R13: 0000000067792ee8 R14: 0000000000498600 R15: 0000000000000000 [ 42.124383][ T636]