[ 12.082190][ T285] 8021q: 802.1Q VLAN Support v1.8 [ 12.103780][ T284] ip (284) used greatest stack depth: 24136 bytes left [ 23.178101][ T365] ip (365) used greatest stack depth: 24008 bytes left [ 23.915504][ T375] [ 23.915735][ T375] ============================================ [ 23.916019][ T375] WARNING: possible recursive locking detected [ 23.916300][ T375] 6.13.0-rc5-virtme #1 Not tainted [ 23.916515][ T375] -------------------------------------------- [ 23.916797][ T375] ip/375 is trying to acquire lock: [ 23.917035][ T375] ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.917497][ T375] [ 23.917497][ T375] but task is already holding lock: [ 23.917838][ T375] ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.918309][ T375] [ 23.918309][ T375] other info that might help us debug this: [ 23.918642][ T375] Possible unsafe locking scenario: [ 23.918642][ T375] [ 23.918967][ T375] CPU0 [ 23.919134][ T375] ---- [ 23.919295][ T375] lock((netdev_chain).rwsem); [ 23.919517][ T375] lock((netdev_chain).rwsem); [ 23.919737][ T375] [ 23.919737][ T375] *** DEADLOCK *** [ 23.919737][ T375] [ 23.920046][ T375] May be due to missing lock nesting notation [ 23.920046][ T375] [ 23.920365][ T375] 2 locks held by ip/375: [ 23.920533][ T375] #0: ffffffff9a5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 23.920961][ T375] #1: ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.921445][ T375] [ 23.921445][ T375] stack backtrace: [ 23.921737][ T375] CPU: 0 UID: 0 PID: 375 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 23.922078][ T375] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.922375][ T375] Call Trace: [ 23.922553][ T375] [ 23.922673][ T375] dump_stack_lvl+0x82/0xd0 [ 23.922910][ T375] print_deadlock_bug+0x40a/0x650 [ 23.923137][ T375] validate_chain+0x5bf/0xae0 [ 23.923365][ T375] ? __pfx_validate_chain+0x10/0x10 [ 23.923603][ T375] ? hlock_class+0x4e/0x130 [ 23.923826][ T375] ? mark_lock+0x38/0x3e0 [ 23.924004][ T375] __lock_acquire+0xb9a/0x1680 [ 23.924246][ T375] lock_acquire.part.0+0xeb/0x330 [ 23.924473][ T375] ? blocking_notifier_call_chain+0x50/0x90 [ 23.924773][ T375] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 23.925060][ T375] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.925300][ T375] ? trace_lock_acquire+0x14c/0x1f0 [ 23.925525][ T375] ? lock_acquire+0x32/0xc0 [ 23.925748][ T375] ? blocking_notifier_call_chain+0x50/0x90 [ 23.926034][ T375] down_read+0x9f/0x340 [ 23.926222][ T375] ? blocking_notifier_call_chain+0x50/0x90 [ 23.926499][ T375] ? __pfx_down_read+0x10/0x10 [ 23.926654][ T375] ? __lock_release+0x103/0x460 [ 23.926801][ T375] ? netconsole_netdev_event+0x2c1/0x620 [ 23.926951][ T375] ? __pfx___lock_release+0x10/0x10 [ 23.927122][ T375] blocking_notifier_call_chain+0x50/0x90 [ 23.927276][ T375] __netdev_upper_dev_unlink+0xd9/0x220 [ 23.927430][ T375] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 23.927616][ T375] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 23.927777][ T375] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 23.927960][ T375] ? rtnl_is_locked+0x15/0x20 [ 23.928123][ T375] netdev_upper_dev_unlink+0x71/0xa0 [ 23.928270][ T375] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 23.928451][ T375] ? netconsole_netdev_event+0x2c1/0x620 [ 23.928599][ T375] ? mutex_is_locked+0x1c/0x60 [ 23.928745][ T375] ? rtnl_is_locked+0x15/0x20 [ 23.928903][ T375] ? netdev_master_upper_dev_get+0x13/0x120 [ 23.929138][ T375] vrf_device_event+0x78/0xe0 [vrf] [ 23.929343][ T375] notifier_call_chain+0xcd/0x150 [ 23.929491][ T375] blocking_notifier_call_chain+0x66/0x90 [ 23.929651][ T375] unregister_netdevice_many_notify+0xa7b/0x1580 [ 23.929843][ T375] ? __lock_release+0x103/0x460 [ 23.929990][ T375] ? __pfx___lock_release+0x10/0x10 [ 23.930157][ T375] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 23.930339][ T375] ? hlock_class+0x4e/0x130 [ 23.930490][ T375] ? mark_held_locks+0x9e/0xe0 [ 23.930640][ T375] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 23.930792][ T375] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.930975][ T375] rtnl_dellink+0x348/0xa40 [ 23.931139][ T375] ? __pfx_rtnl_dellink+0x10/0x10 [ 23.931308][ T375] ? find_held_lock+0x2c/0x110 [ 23.931459][ T375] ? __lock_release+0x103/0x460 [ 23.931608][ T375] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 23.931781][ T375] ? __pfx___lock_release+0x10/0x10 [ 23.931928][ T375] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.932133][ T375] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 23.932283][ T375] ? __pfx_rtnl_dellink+0x10/0x10 [ 23.932438][ T375] rtnetlink_rcv_msg+0x712/0xc10 [ 23.932585][ T375] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 23.932733][ T375] ? hlock_class+0x4e/0x130 [ 23.932880][ T375] ? mark_lock+0x38/0x3e0 [ 23.932992][ T375] ? __lock_acquire+0xb9a/0x1680 [ 23.933196][ T375] netlink_rcv_skb+0x130/0x360 [ 23.933345][ T375] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 23.933501][ T375] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 23.933653][ T375] ? netlink_deliver_tap+0x13e/0x340 [ 23.933801][ T375] ? netlink_deliver_tap+0xc3/0x340 [ 23.933950][ T375] netlink_unicast+0x44b/0x710 [ 23.934105][ T375] ? __pfx_netlink_unicast+0x10/0x10 [ 23.934253][ T375] ? find_held_lock+0x2c/0x110 [ 23.934403][ T375] netlink_sendmsg+0x723/0xbe0 [ 23.934564][ T375] ? __pfx_netlink_sendmsg+0x10/0x10 [ 23.934714][ T375] ____sys_sendmsg+0x7ac/0xa10 [ 23.934863][ T375] ? __pfx_____sys_sendmsg+0x10/0x10 [ 23.935015][ T375] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 23.935209][ T375] ___sys_sendmsg+0xee/0x170 [ 23.935356][ T375] ? __pfx____sys_sendmsg+0x10/0x10 [ 23.935504][ T375] ? kasan_save_stack+0x34/0x50 [ 23.935671][ T375] ? kasan_save_stack+0x24/0x50 [ 23.935819][ T375] ? __kasan_record_aux_stack+0x8e/0xa0 [ 23.935966][ T375] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 23.936166][ T375] ? __x64_sys_close+0x7c/0xd0 [ 23.936316][ T375] ? do_syscall_64+0xc1/0x1d0 [ 23.936467][ T375] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.936653][ T375] ? __lock_acquire+0xb9a/0x1680 [ 23.936805][ T375] ? find_held_lock+0x2c/0x110 [ 23.936962][ T375] ? __lock_release+0x103/0x460 [ 23.937122][ T375] ? __virt_addr_valid+0x22b/0x430 [ 23.937274][ T375] ? __pfx___lock_release+0x10/0x10 [ 23.937420][ T375] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.937570][ T375] __sys_sendmsg+0x109/0x1a0 [ 23.937715][ T375] ? __pfx___sys_sendmsg+0x10/0x10 [ 23.937862][ T375] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 23.938069][ T375] do_syscall_64+0xc1/0x1d0 [ 23.938220][ T375] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.938400][ T375] RIP: 0033:0x7f3503afd9a7 [ 23.938560][ T375] 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 [ 23.939091][ T375] RSP: 002b:00007ffc701bb008 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 23.939315][ T375] RAX: ffffffffffffffda RBX: 00007ffc701bb730 RCX: 00007f3503afd9a7 [ 23.939537][ T375] RDX: 0000000000000000 RSI: 00007ffc701bb070 RDI: 0000000000000005 [ 23.939765][ T375] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 23.939992][ T375] R10: 00007f35039bbef8 R11: 0000000000000246 R12: 0000000000000002 [ 23.940223][ T375] R13: 0000000067795820 R14: 0000000000498600 R15: 0000000000000000 [ 23.940449][ T375] [ 23.958693][ T375] ip (375) used greatest stack depth: 23840 bytes left