[ 14.262276][ T308] 8021q: 802.1Q VLAN Support v1.8 [ 15.061884][ T319] gre: GRE over IPv4 demultiplexor driver [ 15.075375][ T319] ip_gre: GRE over IPv4 tunneling driver [ 15.245622][ T324] ip (324) used greatest stack depth: 23944 bytes left [ 19.262957][ T376] GACT probability NOT on [ 54.641142][ T548] [ 54.641347][ T548] ============================================ [ 54.641536][ T548] WARNING: possible recursive locking detected [ 54.641720][ T548] 6.13.0-rc5-virtme #1 Not tainted [ 54.641868][ T548] -------------------------------------------- [ 54.642055][ T548] ip/548 is trying to acquire lock: [ 54.642203][ T548] ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 54.642517][ T548] [ 54.642517][ T548] but task is already holding lock: [ 54.642751][ T548] ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 54.643047][ T548] [ 54.643047][ T548] other info that might help us debug this: [ 54.643265][ T548] Possible unsafe locking scenario: [ 54.643265][ T548] [ 54.643559][ T548] CPU0 [ 54.643733][ T548] ---- [ 54.643933][ T548] lock((netdev_chain).rwsem); [ 54.644163][ T548] lock((netdev_chain).rwsem); [ 54.644313][ T548] [ 54.644313][ T548] *** DEADLOCK *** [ 54.644313][ T548] [ 54.644524][ T548] May be due to missing lock nesting notation [ 54.644524][ T548] [ 54.644743][ T548] 2 locks held by ip/548: [ 54.644857][ T548] #0: ffffffffaefe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 54.645140][ T548] #1: ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 54.645433][ T548] [ 54.645433][ T548] stack backtrace: [ 54.645613][ T548] CPU: 3 UID: 0 PID: 548 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 54.645831][ T548] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 54.646013][ T548] Call Trace: [ 54.646129][ T548] [ 54.646206][ T548] dump_stack_lvl+0x82/0xd0 [ 54.646357][ T548] print_deadlock_bug+0x40a/0x650 [ 54.646507][ T548] validate_chain+0x5bf/0xae0 [ 54.646656][ T548] ? __pfx_validate_chain+0x10/0x10 [ 54.646814][ T548] ? hlock_class+0x4e/0x130 [ 54.646961][ T548] ? mark_lock+0x38/0x3e0 [ 54.647073][ T548] __lock_acquire+0xb9a/0x1680 [ 54.647227][ T548] lock_acquire.part.0+0xeb/0x330 [ 54.647372][ T548] ? blocking_notifier_call_chain+0x50/0x90 [ 54.647553][ T548] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 54.647737][ T548] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 54.647884][ T548] ? trace_lock_acquire+0x14c/0x1f0 [ 54.648030][ T548] ? lock_acquire+0x32/0xc0 [ 54.648173][ T548] ? blocking_notifier_call_chain+0x50/0x90 [ 54.648358][ T548] down_read+0x9f/0x340 [ 54.648470][ T548] ? blocking_notifier_call_chain+0x50/0x90 [ 54.648649][ T548] ? __pfx_down_read+0x10/0x10 [ 54.648793][ T548] ? __lock_release+0x103/0x460 [ 54.648938][ T548] ? netconsole_netdev_event+0x2c1/0x620 [ 54.649085][ T548] ? __pfx___lock_release+0x10/0x10 [ 54.649230][ T548] blocking_notifier_call_chain+0x50/0x90 [ 54.649380][ T548] __netdev_upper_dev_unlink+0xd9/0x220 [ 54.649530][ T548] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 54.649711][ T548] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 54.649856][ T548] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 54.650035][ T548] ? rtnl_is_locked+0x15/0x20 [ 54.650183][ T548] netdev_upper_dev_unlink+0x71/0xa0 [ 54.650328][ T548] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 54.650513][ T548] ? netconsole_netdev_event+0x2c1/0x620 [ 54.650659][ T548] ? mutex_is_locked+0x1c/0x60 [ 54.650805][ T548] ? rtnl_is_locked+0x15/0x20 [ 54.650951][ T548] ? netdev_master_upper_dev_get+0x13/0x120 [ 54.651131][ T548] vrf_device_event+0x78/0xe0 [vrf] [ 54.651281][ T548] notifier_call_chain+0xcd/0x150 [ 54.651432][ T548] blocking_notifier_call_chain+0x66/0x90 [ 54.651581][ T548] unregister_netdevice_many_notify+0xa7b/0x1580 [ 54.651760][ T548] ? hlock_class+0x4e/0x130 [ 54.651905][ T548] ? mark_lock+0x38/0x3e0 [ 54.652017][ T548] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 54.652196][ T548] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 54.652380][ T548] ? kfree+0xf3/0x330 [ 54.652498][ T548] ? vlan_vid_del+0x310/0x5e0 [ 54.652647][ T548] ? vlan_vid_del+0x310/0x5e0 [ 54.652793][ T548] rtnl_dellink+0x348/0xa40 [ 54.652938][ T548] ? __pfx_rtnl_dellink+0x10/0x10 [ 54.653099][ T548] ? find_held_lock+0x2c/0x110 [ 54.653245][ T548] ? __lock_release+0x103/0x460 [ 54.653390][ T548] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 54.653535][ T548] ? __pfx___lock_release+0x10/0x10 [ 54.653688][ T548] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 54.653851][ T548] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 54.653997][ T548] ? __pfx_rtnl_dellink+0x10/0x10 [ 54.654143][ T548] rtnetlink_rcv_msg+0x712/0xc10 [ 54.654288][ T548] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 54.654432][ T548] ? hlock_class+0x4e/0x130 [ 54.654576][ T548] ? mark_lock+0x38/0x3e0 [ 54.654692][ T548] ? __lock_acquire+0xb9a/0x1680 [ 54.654839][ T548] netlink_rcv_skb+0x130/0x360 [ 54.654984][ T548] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 54.655131][ T548] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 54.655280][ T548] ? netlink_deliver_tap+0x13e/0x340 [ 54.655428][ T548] ? netlink_deliver_tap+0xc3/0x340 [ 54.655575][ T548] netlink_unicast+0x44b/0x710 [ 54.655724][ T548] ? __pfx_netlink_unicast+0x10/0x10 [ 54.655868][ T548] ? find_held_lock+0x2c/0x110 [ 54.656017][ T548] netlink_sendmsg+0x723/0xbe0 [ 54.656162][ T548] ? __pfx_netlink_sendmsg+0x10/0x10 [ 54.656309][ T548] ____sys_sendmsg+0x7ac/0xa10 [ 54.656454][ T548] ? __pfx_____sys_sendmsg+0x10/0x10 [ 54.656602][ T548] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 54.656792][ T548] ___sys_sendmsg+0xee/0x170 [ 54.656937][ T548] ? __pfx____sys_sendmsg+0x10/0x10 [ 54.657084][ T548] ? kasan_save_stack+0x34/0x50 [ 54.657233][ T548] ? kasan_save_stack+0x24/0x50 [ 54.657378][ T548] ? __kasan_record_aux_stack+0x8e/0xa0 [ 54.657527][ T548] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 54.657709][ T548] ? __x64_sys_close+0x7c/0xd0 [ 54.657855][ T548] ? do_syscall_64+0xc1/0x1d0 [ 54.658006][ T548] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.658191][ T548] ? __lock_acquire+0xb9a/0x1680 [ 54.658338][ T548] ? find_held_lock+0x2c/0x110 [ 54.658486][ T548] ? __lock_release+0x103/0x460 [ 54.658628][ T548] ? __virt_addr_valid+0x22b/0x430 [ 54.658784][ T548] ? __pfx___lock_release+0x10/0x10 [ 54.658929][ T548] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 54.659081][ T548] __sys_sendmsg+0x109/0x1a0 [ 54.659227][ T548] ? __pfx___sys_sendmsg+0x10/0x10 [ 54.659370][ T548] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 54.659557][ T548] do_syscall_64+0xc1/0x1d0 [ 54.659707][ T548] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.659891][ T548] RIP: 0033:0x7f5bbffe89a7 [ 54.660046][ T548] 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 [ 54.660586][ T548] RSP: 002b:00007ffdef9c3118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 54.660811][ T548] RAX: ffffffffffffffda RBX: 00007ffdef9c3840 RCX: 00007f5bbffe89a7 [ 54.661032][ T548] RDX: 0000000000000000 RSI: 00007ffdef9c3180 RDI: 0000000000000005 [ 54.661255][ T548] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 54.661476][ T548] R10: 00007f5bbfea6ef8 R11: 0000000000000246 R12: 0000000000000002 [ 54.661693][ T548] R13: 00000000677903f6 R14: 0000000000498600 R15: 0000000000000000 [ 54.661916][ T548] [ 54.680387][ T548] ip (548) used greatest stack depth: 23880 bytes left