[ 26.290764][ T447] gre: GRE over IPv4 demultiplexor driver [ 26.334607][ T447] ip6_gre: GRE over IPv6 tunneling driver [ 27.873377][ T469] 8021q: 802.1Q VLAN Support v1.8 [ 30.961303][ T507] GACT probability NOT on [ 30.981217][ T505] tc (505) used greatest stack depth: 23960 bytes left [ 177.626345][ T720] [ 177.626529][ T720] ============================================ [ 177.626737][ T720] WARNING: possible recursive locking detected [ 177.626947][ T720] 6.13.0-rc5-virtme #1 Not tainted [ 177.627112][ T720] -------------------------------------------- [ 177.627359][ T720] ip/720 is trying to acquire lock: [ 177.627524][ T720] ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 177.627864][ T720] [ 177.627864][ T720] but task is already holding lock: [ 177.628110][ T720] ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 177.628439][ T720] [ 177.628439][ T720] other info that might help us debug this: [ 177.628685][ T720] Possible unsafe locking scenario: [ 177.628685][ T720] [ 177.628932][ T720] CPU0 [ 177.629053][ T720] ---- [ 177.629180][ T720] lock((netdev_chain).rwsem); [ 177.629354][ T720] lock((netdev_chain).rwsem); [ 177.629517][ T720] [ 177.629517][ T720] *** DEADLOCK *** [ 177.629517][ T720] [ 177.629751][ T720] May be due to missing lock nesting notation [ 177.629751][ T720] [ 177.629987][ T720] 2 locks held by ip/720: [ 177.630117][ T720] #0: ffffffff87de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 177.630410][ T720] #1: ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 177.630740][ T720] [ 177.630740][ T720] stack backtrace: [ 177.630940][ T720] CPU: 0 UID: 0 PID: 720 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 177.631184][ T720] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 177.631394][ T720] Call Trace: [ 177.631519][ T720] [ 177.631605][ T720] dump_stack_lvl+0x82/0xd0 [ 177.631770][ T720] print_deadlock_bug+0x40a/0x650 [ 177.631934][ T720] validate_chain+0x5bf/0xae0 [ 177.632101][ T720] ? __pfx_validate_chain+0x10/0x10 [ 177.632266][ T720] ? hlock_class+0x4e/0x130 [ 177.632430][ T720] ? mark_lock+0x38/0x3e0 [ 177.632559][ T720] __lock_acquire+0xb9a/0x1680 [ 177.632726][ T720] lock_acquire.part.0+0xeb/0x330 [ 177.632889][ T720] ? blocking_notifier_call_chain+0x50/0x90 [ 177.633092][ T720] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 177.633298][ T720] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 177.633462][ T720] ? trace_lock_acquire+0x14c/0x1f0 [ 177.633623][ T720] ? lock_acquire+0x32/0xc0 [ 177.633789][ T720] ? blocking_notifier_call_chain+0x50/0x90 [ 177.633992][ T720] down_read+0x9f/0x340 [ 177.634120][ T720] ? blocking_notifier_call_chain+0x50/0x90 [ 177.634324][ T720] ? __pfx_down_read+0x10/0x10 [ 177.634486][ T720] ? __lock_release+0x103/0x460 [ 177.634647][ T720] ? netconsole_netdev_event+0x2c1/0x620 [ 177.634813][ T720] ? __pfx___lock_release+0x10/0x10 [ 177.634982][ T720] blocking_notifier_call_chain+0x50/0x90 [ 177.635145][ T720] __netdev_upper_dev_unlink+0xd9/0x220 [ 177.635309][ T720] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 177.635513][ T720] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 177.635677][ T720] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 177.635879][ T720] ? rtnl_is_locked+0x15/0x20 [ 177.636050][ T720] netdev_upper_dev_unlink+0x71/0xa0 [ 177.636212][ T720] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 177.636414][ T720] ? netconsole_netdev_event+0x2c1/0x620 [ 177.636576][ T720] ? mutex_is_locked+0x1c/0x60 [ 177.636741][ T720] ? rtnl_is_locked+0x15/0x20 [ 177.636903][ T720] ? netdev_master_upper_dev_get+0x13/0x120 [ 177.637104][ T720] vrf_device_event+0x78/0xe0 [vrf] [ 177.637291][ T720] notifier_call_chain+0xcd/0x150 [ 177.637454][ T720] blocking_notifier_call_chain+0x66/0x90 [ 177.637618][ T720] unregister_netdevice_many_notify+0xa7b/0x1580 [ 177.637820][ T720] ? hlock_class+0x4e/0x130 [ 177.637984][ T720] ? mark_lock+0x38/0x3e0 [ 177.638108][ T720] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 177.638310][ T720] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 177.638517][ T720] ? kfree+0xf3/0x330 [ 177.638643][ T720] ? vlan_vid_del+0x310/0x5e0 [ 177.638807][ T720] ? vlan_vid_del+0x310/0x5e0 [ 177.638973][ T720] rtnl_dellink+0x348/0xa40 [ 177.639137][ T720] ? __pfx_rtnl_dellink+0x10/0x10 [ 177.639316][ T720] ? find_held_lock+0x2c/0x110 [ 177.639479][ T720] ? __lock_release+0x103/0x460 [ 177.639641][ T720] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 177.639812][ T720] ? __pfx___lock_release+0x10/0x10 [ 177.639975][ T720] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 177.640140][ T720] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 177.640301][ T720] ? __pfx_rtnl_dellink+0x10/0x10 [ 177.640466][ T720] rtnetlink_rcv_msg+0x712/0xc10 [ 177.640630][ T720] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 177.640793][ T720] ? hlock_class+0x4e/0x130 [ 177.640957][ T720] ? mark_lock+0x38/0x3e0 [ 177.641082][ T720] ? __lock_acquire+0xb9a/0x1680 [ 177.641247][ T720] netlink_rcv_skb+0x130/0x360 [ 177.641409][ T720] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 177.641571][ T720] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 177.641736][ T720] ? netlink_deliver_tap+0x13e/0x340 [ 177.641902][ T720] ? netlink_deliver_tap+0xc3/0x340 [ 177.642073][ T720] netlink_unicast+0x44b/0x710 [ 177.642236][ T720] ? __pfx_netlink_unicast+0x10/0x10 [ 177.642398][ T720] ? find_held_lock+0x2c/0x110 [ 177.642562][ T720] netlink_sendmsg+0x723/0xbe0 [ 177.642727][ T720] ? __pfx_netlink_sendmsg+0x10/0x10 [ 177.642893][ T720] ____sys_sendmsg+0x7ac/0xa10 [ 177.643054][ T720] ? __pfx_____sys_sendmsg+0x10/0x10 [ 177.643222][ T720] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 177.643429][ T720] ___sys_sendmsg+0xee/0x170 [ 177.643590][ T720] ? __pfx____sys_sendmsg+0x10/0x10 [ 177.643752][ T720] ? kasan_save_stack+0x34/0x50 [ 177.643916][ T720] ? kasan_save_stack+0x24/0x50 [ 177.644076][ T720] ? __kasan_record_aux_stack+0x8e/0xa0 [ 177.644238][ T720] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 177.644447][ T720] ? __x64_sys_close+0x7c/0xd0 [ 177.644609][ T720] ? do_syscall_64+0xc1/0x1d0 [ 177.644772][ T720] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 177.644974][ T720] ? __lock_acquire+0xb9a/0x1680 [ 177.645139][ T720] ? find_held_lock+0x2c/0x110 [ 177.645304][ T720] ? __lock_release+0x103/0x460 [ 177.645465][ T720] ? __virt_addr_valid+0x22b/0x430 [ 177.645628][ T720] ? __pfx___lock_release+0x10/0x10 [ 177.645791][ T720] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 177.645959][ T720] __sys_sendmsg+0x109/0x1a0 [ 177.646122][ T720] ? __pfx___sys_sendmsg+0x10/0x10 [ 177.646284][ T720] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 177.646492][ T720] do_syscall_64+0xc1/0x1d0 [ 177.646655][ T720] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 177.646867][ T720] RIP: 0033:0x7f02eac4c9a7 [ 177.647042][ T720] 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 [ 177.647627][ T720] RSP: 002b:00007fff44149848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 177.647880][ T720] RAX: ffffffffffffffda RBX: 00007fff44149f70 RCX: 00007f02eac4c9a7 [ 177.648129][ T720] RDX: 0000000000000000 RSI: 00007fff441498b0 RDI: 0000000000000005 [ 177.648373][ T720] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 177.648619][ T720] R10: 00007f02eab0aef8 R11: 0000000000000246 R12: 0000000000000002 [ 177.648861][ T720] R13: 0000000067792cb9 R14: 0000000000498600 R15: 0000000000000000 [ 177.649116][ T720] [ 177.678299][ T720] ip (720) used greatest stack depth: 23712 bytes left