[ 17.361667][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 17.814018][ T360] gre: GRE over IPv4 demultiplexor driver [ 17.865409][ T360] ip6_gre: GRE over IPv6 tunneling driver [ 27.800779][ T443] GACT probability NOT on [ 44.153073][ T656] [ 44.153288][ T656] ============================================ [ 44.153471][ T656] WARNING: possible recursive locking detected [ 44.153658][ T656] 6.13.0-rc5-virtme #1 Not tainted [ 44.153803][ T656] -------------------------------------------- [ 44.153984][ T656] ip/656 is trying to acquire lock: [ 44.154129][ T656] ffffffff9b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.154431][ T656] [ 44.154431][ T656] but task is already holding lock: [ 44.154659][ T656] ffffffff9b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.154965][ T656] [ 44.154965][ T656] other info that might help us debug this: [ 44.155175][ T656] Possible unsafe locking scenario: [ 44.155175][ T656] [ 44.155384][ T656] CPU0 [ 44.155493][ T656] ---- [ 44.155601][ T656] lock((netdev_chain).rwsem); [ 44.155745][ T656] lock((netdev_chain).rwsem); [ 44.155898][ T656] [ 44.155898][ T656] *** DEADLOCK *** [ 44.155898][ T656] [ 44.156110][ T656] May be due to missing lock nesting notation [ 44.156110][ T656] [ 44.156324][ T656] 2 locks held by ip/656: [ 44.156435][ T656] #0: ffffffff9b9e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.156701][ T656] #1: ffffffff9b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.157016][ T656] [ 44.157016][ T656] stack backtrace: [ 44.157206][ T656] CPU: 2 UID: 0 PID: 656 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.157425][ T656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.157604][ T656] Call Trace: [ 44.157715][ T656] [ 44.157792][ T656] dump_stack_lvl+0x82/0xd0 [ 44.157957][ T656] print_deadlock_bug+0x40a/0x650 [ 44.158103][ T656] validate_chain+0x5bf/0xae0 [ 44.158259][ T656] ? __pfx_validate_chain+0x10/0x10 [ 44.158412][ T656] ? hlock_class+0x4e/0x130 [ 44.158561][ T656] ? mark_lock+0x38/0x3e0 [ 44.158673][ T656] __lock_acquire+0xb9a/0x1680 [ 44.158822][ T656] lock_acquire.part.0+0xeb/0x330 [ 44.158967][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.159166][ T656] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.159349][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.159496][ T656] ? trace_lock_acquire+0x14c/0x1f0 [ 44.159642][ T656] ? lock_acquire+0x32/0xc0 [ 44.159785][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.159965][ T656] down_read+0x9f/0x340 [ 44.160076][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.160264][ T656] ? __pfx_down_read+0x10/0x10 [ 44.160408][ T656] ? __lock_release+0x103/0x460 [ 44.160553][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.160698][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.160845][ T656] blocking_notifier_call_chain+0x50/0x90 [ 44.160990][ T656] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.161140][ T656] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.161323][ T656] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.161468][ T656] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.161648][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.161795][ T656] netdev_upper_dev_unlink+0x71/0xa0 [ 44.161941][ T656] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.162120][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.162272][ T656] ? mutex_is_locked+0x1c/0x60 [ 44.162419][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.162564][ T656] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.162744][ T656] vrf_device_event+0x78/0xe0 [vrf] [ 44.162892][ T656] notifier_call_chain+0xcd/0x150 [ 44.163039][ T656] blocking_notifier_call_chain+0x66/0x90 [ 44.163185][ T656] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.163383][ T656] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.163563][ T656] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 44.163712][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.163865][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.164012][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.164158][ T656] ? unregister_netdevice_queue+0x70/0x410 [ 44.164344][ T656] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 44.164525][ T656] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 44.164685][ T656] rtnl_dellink+0x348/0xa40 [ 44.164834][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.164994][ T656] ? find_held_lock+0x2c/0x110 [ 44.165140][ T656] ? __lock_release+0x103/0x460 [ 44.165299][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.165451][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.165597][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.165744][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.165887][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.166036][ T656] rtnetlink_rcv_msg+0x712/0xc10 [ 44.166181][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.166327][ T656] ? hlock_class+0x4e/0x130 [ 44.166475][ T656] ? mark_lock+0x38/0x3e0 [ 44.166587][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.166735][ T656] netlink_rcv_skb+0x130/0x360 [ 44.166880][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.167026][ T656] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.167176][ T656] ? netlink_deliver_tap+0x13e/0x340 [ 44.167323][ T656] ? netlink_deliver_tap+0xc3/0x340 [ 44.167477][ T656] netlink_unicast+0x44b/0x710 [ 44.167621][ T656] ? __pfx_netlink_unicast+0x10/0x10 [ 44.167766][ T656] ? find_held_lock+0x2c/0x110 [ 44.167913][ T656] netlink_sendmsg+0x723/0xbe0 [ 44.168057][ T656] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.168203][ T656] ____sys_sendmsg+0x7ac/0xa10 [ 44.168349][ T656] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.168493][ T656] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.168683][ T656] ___sys_sendmsg+0xee/0x170 [ 44.168827][ T656] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.168975][ T656] ? kasan_save_stack+0x34/0x50 [ 44.169121][ T656] ? kasan_save_stack+0x24/0x50 [ 44.169265][ T656] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.169411][ T656] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.169604][ T656] ? __x64_sys_close+0x7c/0xd0 [ 44.169756][ T656] ? do_syscall_64+0xc1/0x1d0 [ 44.169902][ T656] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.170085][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.170235][ T656] ? find_held_lock+0x2c/0x110 [ 44.170383][ T656] ? __lock_release+0x103/0x460 [ 44.170527][ T656] ? __virt_addr_valid+0x22b/0x430 [ 44.170687][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.170837][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.170983][ T656] __sys_sendmsg+0x109/0x1a0 [ 44.171128][ T656] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.171273][ T656] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.171460][ T656] do_syscall_64+0xc1/0x1d0 [ 44.171608][ T656] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.171799][ T656] RIP: 0033:0x7f1c80d3f9a7 [ 44.171961][ T656] 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 [ 44.172470][ T656] RSP: 002b:00007ffe5d47b328 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.172704][ T656] RAX: ffffffffffffffda RBX: 00007ffe5d47ba50 RCX: 00007f1c80d3f9a7 [ 44.172937][ T656] RDX: 0000000000000000 RSI: 00007ffe5d47b390 RDI: 0000000000000005 [ 44.173154][ T656] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.173373][ T656] R10: 00007f1c80bfdef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.173597][ T656] R13: 0000000067790448 R14: 0000000000498600 R15: 0000000000000000 [ 44.173837][ T656] [ 44.203494][ T656] ip (656) used greatest stack depth: 23944 bytes left