[ 10.872595][ T259] ip (259) used greatest stack depth: 23376 bytes left [ 14.302612][ T314] 8021q: 802.1Q VLAN Support v1.8 [ 14.640672][ T319] gre: GRE over IPv4 demultiplexor driver [ 14.652407][ T319] ip_gre: GRE over IPv4 tunneling driver [ 32.083373][ T418] [ 32.083559][ T418] ============================================ [ 32.083772][ T418] WARNING: possible recursive locking detected [ 32.083970][ T418] 6.13.0-rc5-virtme #1 Not tainted [ 32.084124][ T418] -------------------------------------------- [ 32.084308][ T418] ip/418 is trying to acquire lock: [ 32.084454][ T418] ffffffffbb1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.084781][ T418] [ 32.084781][ T418] but task is already holding lock: [ 32.084998][ T418] ffffffffbb1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.085311][ T418] [ 32.085311][ T418] other info that might help us debug this: [ 32.085560][ T418] Possible unsafe locking scenario: [ 32.085560][ T418] [ 32.085786][ T418] CPU0 [ 32.085911][ T418] ---- [ 32.086021][ T418] lock((netdev_chain).rwsem); [ 32.086191][ T418] lock((netdev_chain).rwsem); [ 32.086364][ T418] [ 32.086364][ T418] *** DEADLOCK *** [ 32.086364][ T418] [ 32.086588][ T418] May be due to missing lock nesting notation [ 32.086588][ T418] [ 32.086802][ T418] 2 locks held by ip/418: [ 32.086918][ T418] #0: ffffffffbb1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.087200][ T418] #1: ffffffffbb1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.087499][ T418] [ 32.087499][ T418] stack backtrace: [ 32.087681][ T418] CPU: 0 UID: 0 PID: 418 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.087906][ T418] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.088098][ T418] Call Trace: [ 32.088251][ T418] [ 32.088348][ T418] dump_stack_lvl+0x82/0xd0 [ 32.088510][ T418] print_deadlock_bug+0x40a/0x650 [ 32.088674][ T418] validate_chain+0x5bf/0xae0 [ 32.088840][ T418] ? __pfx_validate_chain+0x10/0x10 [ 32.089002][ T418] ? hlock_class+0x4e/0x130 [ 32.089157][ T418] ? mark_lock+0x38/0x3e0 [ 32.089270][ T418] __lock_acquire+0xb9a/0x1680 [ 32.089455][ T418] lock_acquire.part.0+0xeb/0x330 [ 32.089608][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 32.089806][ T418] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.090011][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.090172][ T418] ? trace_lock_acquire+0x14c/0x1f0 [ 32.090337][ T418] ? lock_acquire+0x32/0xc0 [ 32.090481][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 32.090681][ T418] down_read+0x9f/0x340 [ 32.090795][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 32.090977][ T418] ? __pfx_down_read+0x10/0x10 [ 32.091145][ T418] ? __lock_release+0x103/0x460 [ 32.091298][ T418] ? netconsole_netdev_event+0x2c1/0x620 [ 32.091445][ T418] ? __pfx___lock_release+0x10/0x10 [ 32.091608][ T418] blocking_notifier_call_chain+0x50/0x90 [ 32.091760][ T418] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.091909][ T418] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.092090][ T418] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.092240][ T418] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.092419][ T418] ? rtnl_is_locked+0x15/0x20 [ 32.092583][ T418] netdev_upper_dev_unlink+0x71/0xa0 [ 32.092745][ T418] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.092950][ T418] ? netconsole_netdev_event+0x2c1/0x620 [ 32.093097][ T418] ? mutex_is_locked+0x1c/0x60 [ 32.093260][ T418] ? rtnl_is_locked+0x15/0x20 [ 32.093434][ T418] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.093641][ T418] vrf_device_event+0x78/0xe0 [vrf] [ 32.093807][ T418] notifier_call_chain+0xcd/0x150 [ 32.093960][ T418] blocking_notifier_call_chain+0x66/0x90 [ 32.094120][ T418] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.094321][ T418] ? __lock_release+0x103/0x460 [ 32.094484][ T418] ? __pfx___lock_release+0x10/0x10 [ 32.094632][ T418] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.094815][ T418] ? hlock_class+0x4e/0x130 [ 32.094982][ T418] ? mark_held_locks+0x9e/0xe0 [ 32.095155][ T418] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.095306][ T418] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.095491][ T418] rtnl_dellink+0x348/0xa40 [ 32.095641][ T418] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.095802][ T418] ? find_held_lock+0x2c/0x110 [ 32.095955][ T418] ? __lock_release+0x103/0x460 [ 32.096104][ T418] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.096262][ T418] ? __pfx___lock_release+0x10/0x10 [ 32.096416][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.096567][ T418] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.096716][ T418] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.096862][ T418] rtnetlink_rcv_msg+0x712/0xc10 [ 32.097010][ T418] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.097162][ T418] ? hlock_class+0x4e/0x130 [ 32.097309][ T418] ? mark_lock+0x38/0x3e0 [ 32.097429][ T418] ? __lock_acquire+0xb9a/0x1680 [ 32.097576][ T418] netlink_rcv_skb+0x130/0x360 [ 32.097724][ T418] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.097873][ T418] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.098024][ T418] ? netlink_deliver_tap+0x13e/0x340 [ 32.098177][ T418] ? netlink_deliver_tap+0xc3/0x340 [ 32.098324][ T418] netlink_unicast+0x44b/0x710 [ 32.098475][ T418] ? __pfx_netlink_unicast+0x10/0x10 [ 32.098620][ T418] ? find_held_lock+0x2c/0x110 [ 32.098766][ T418] netlink_sendmsg+0x723/0xbe0 [ 32.098913][ T418] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.099061][ T418] ____sys_sendmsg+0x7ac/0xa10 [ 32.099214][ T418] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.099360][ T418] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.099552][ T418] ___sys_sendmsg+0xee/0x170 [ 32.099697][ T418] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.099843][ T418] ? kasan_save_stack+0x34/0x50 [ 32.099990][ T418] ? kasan_save_stack+0x24/0x50 [ 32.100148][ T418] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.100297][ T418] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.100481][ T418] ? __x64_sys_close+0x7c/0xd0 [ 32.100633][ T418] ? do_syscall_64+0xc1/0x1d0 [ 32.100781][ T418] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.100966][ T418] ? __lock_acquire+0xb9a/0x1680 [ 32.101117][ T418] ? find_held_lock+0x2c/0x110 [ 32.101284][ T418] ? __lock_release+0x103/0x460 [ 32.101442][ T418] ? __virt_addr_valid+0x22b/0x430 [ 32.101610][ T418] ? __pfx___lock_release+0x10/0x10 [ 32.101762][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.101912][ T418] __sys_sendmsg+0x109/0x1a0 [ 32.102070][ T418] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.102224][ T418] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.102423][ T418] do_syscall_64+0xc1/0x1d0 [ 32.102577][ T418] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.102773][ T418] RIP: 0033:0x7fb91e1a89a7 [ 32.102944][ T418] 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 [ 32.103486][ T418] RSP: 002b:00007ffd659735f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.103732][ T418] RAX: ffffffffffffffda RBX: 00007ffd65973d20 RCX: 00007fb91e1a89a7 [ 32.103967][ T418] RDX: 0000000000000000 RSI: 00007ffd65973660 RDI: 0000000000000005 [ 32.104217][ T418] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.104450][ T418] R10: 00007fb91e066ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.104676][ T418] R13: 0000000067790498 R14: 0000000000498600 R15: 0000000000000000 [ 32.104915][ T418]