[ 12.038024][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 23.053054][ T368] ip (368) used greatest stack depth: 23240 bytes left [ 23.670617][ T377] [ 23.670770][ T377] ============================================ [ 23.670965][ T377] WARNING: possible recursive locking detected [ 23.671145][ T377] 6.13.0-rc5-virtme #1 Not tainted [ 23.671290][ T377] -------------------------------------------- [ 23.671482][ T377] ip/377 is trying to acquire lock: [ 23.671635][ T377] ffffffff8e5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.671958][ T377] [ 23.671958][ T377] but task is already holding lock: [ 23.672191][ T377] ffffffff8e5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.672494][ T377] [ 23.672494][ T377] other info that might help us debug this: [ 23.672715][ T377] Possible unsafe locking scenario: [ 23.672715][ T377] [ 23.672938][ T377] CPU0 [ 23.673055][ T377] ---- [ 23.673167][ T377] lock((netdev_chain).rwsem); [ 23.673328][ T377] lock((netdev_chain).rwsem); [ 23.673491][ T377] [ 23.673491][ T377] *** DEADLOCK *** [ 23.673491][ T377] [ 23.673718][ T377] May be due to missing lock nesting notation [ 23.673718][ T377] [ 23.673931][ T377] 2 locks held by ip/377: [ 23.674042][ T377] #0: ffffffff8e5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 23.674312][ T377] #1: ffffffff8e5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 23.674619][ T377] [ 23.674619][ T377] stack backtrace: [ 23.674803][ T377] CPU: 3 UID: 0 PID: 377 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 23.675023][ T377] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.675204][ T377] Call Trace: [ 23.675324][ T377] [ 23.675401][ T377] dump_stack_lvl+0x82/0xd0 [ 23.675554][ T377] print_deadlock_bug+0x40a/0x650 [ 23.675701][ T377] validate_chain+0x5bf/0xae0 [ 23.675858][ T377] ? __pfx_validate_chain+0x10/0x10 [ 23.676007][ T377] ? hlock_class+0x4e/0x130 [ 23.676166][ T377] ? mark_lock+0x38/0x3e0 [ 23.676277][ T377] __lock_acquire+0xb9a/0x1680 [ 23.676424][ T377] lock_acquire.part.0+0xeb/0x330 [ 23.676576][ T377] ? blocking_notifier_call_chain+0x50/0x90 [ 23.676760][ T377] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 23.676957][ T377] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.677103][ T377] ? trace_lock_acquire+0x14c/0x1f0 [ 23.677252][ T377] ? lock_acquire+0x32/0xc0 [ 23.677403][ T377] ? blocking_notifier_call_chain+0x50/0x90 [ 23.677610][ T377] down_read+0x9f/0x340 [ 23.677735][ T377] ? blocking_notifier_call_chain+0x50/0x90 [ 23.677959][ T377] ? __pfx_down_read+0x10/0x10 [ 23.678119][ T377] ? __lock_release+0x103/0x460 [ 23.678285][ T377] ? netconsole_netdev_event+0x2c1/0x620 [ 23.678451][ T377] ? __pfx___lock_release+0x10/0x10 [ 23.678618][ T377] blocking_notifier_call_chain+0x50/0x90 [ 23.678778][ T377] __netdev_upper_dev_unlink+0xd9/0x220 [ 23.678943][ T377] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 23.679126][ T377] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 23.679274][ T377] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 23.679469][ T377] ? rtnl_is_locked+0x15/0x20 [ 23.679622][ T377] netdev_upper_dev_unlink+0x71/0xa0 [ 23.679767][ T377] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 23.679948][ T377] ? netconsole_netdev_event+0x2c1/0x620 [ 23.680097][ T377] ? mutex_is_locked+0x1c/0x60 [ 23.680255][ T377] ? rtnl_is_locked+0x15/0x20 [ 23.680405][ T377] ? netdev_master_upper_dev_get+0x13/0x120 [ 23.680601][ T377] vrf_device_event+0x78/0xe0 [vrf] [ 23.680782][ T377] notifier_call_chain+0xcd/0x150 [ 23.680930][ T377] blocking_notifier_call_chain+0x66/0x90 [ 23.681088][ T377] unregister_netdevice_many_notify+0xa7b/0x1580 [ 23.681290][ T377] ? __lock_release+0x103/0x460 [ 23.681449][ T377] ? __pfx___lock_release+0x10/0x10 [ 23.681603][ T377] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 23.681795][ T377] ? hlock_class+0x4e/0x130 [ 23.681957][ T377] ? mark_held_locks+0x9e/0xe0 [ 23.682126][ T377] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 23.682290][ T377] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.682503][ T377] rtnl_dellink+0x348/0xa40 [ 23.682684][ T377] ? __pfx_rtnl_dellink+0x10/0x10 [ 23.682872][ T377] ? find_held_lock+0x2c/0x110 [ 23.683032][ T377] ? __lock_release+0x103/0x460 [ 23.683184][ T377] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 23.683343][ T377] ? __pfx___lock_release+0x10/0x10 [ 23.683510][ T377] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.683670][ T377] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 23.683817][ T377] ? __pfx_rtnl_dellink+0x10/0x10 [ 23.683969][ T377] rtnetlink_rcv_msg+0x712/0xc10 [ 23.684131][ T377] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 23.684291][ T377] ? hlock_class+0x4e/0x130 [ 23.684448][ T377] ? mark_lock+0x38/0x3e0 [ 23.684560][ T377] ? __lock_acquire+0xb9a/0x1680 [ 23.684705][ T377] netlink_rcv_skb+0x130/0x360 [ 23.684849][ T377] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 23.684995][ T377] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 23.685143][ T377] ? netlink_deliver_tap+0x13e/0x340 [ 23.685291][ T377] ? netlink_deliver_tap+0xc3/0x340 [ 23.685453][ T377] netlink_unicast+0x44b/0x710 [ 23.685612][ T377] ? __pfx_netlink_unicast+0x10/0x10 [ 23.685777][ T377] ? find_held_lock+0x2c/0x110 [ 23.685946][ T377] netlink_sendmsg+0x723/0xbe0 [ 23.686116][ T377] ? __pfx_netlink_sendmsg+0x10/0x10 [ 23.686276][ T377] ____sys_sendmsg+0x7ac/0xa10 [ 23.686432][ T377] ? __pfx_____sys_sendmsg+0x10/0x10 [ 23.686608][ T377] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 23.686821][ T377] ___sys_sendmsg+0xee/0x170 [ 23.686989][ T377] ? __pfx____sys_sendmsg+0x10/0x10 [ 23.687145][ T377] ? kasan_save_stack+0x34/0x50 [ 23.687298][ T377] ? kasan_save_stack+0x24/0x50 [ 23.687463][ T377] ? __kasan_record_aux_stack+0x8e/0xa0 [ 23.687634][ T377] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 23.687838][ T377] ? __x64_sys_close+0x7c/0xd0 [ 23.687997][ T377] ? do_syscall_64+0xc1/0x1d0 [ 23.688149][ T377] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.688342][ T377] ? __lock_acquire+0xb9a/0x1680 [ 23.688500][ T377] ? find_held_lock+0x2c/0x110 [ 23.688662][ T377] ? __lock_release+0x103/0x460 [ 23.688808][ T377] ? __virt_addr_valid+0x22b/0x430 [ 23.688981][ T377] ? __pfx___lock_release+0x10/0x10 [ 23.689139][ T377] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.689292][ T377] __sys_sendmsg+0x109/0x1a0 [ 23.689449][ T377] ? __pfx___sys_sendmsg+0x10/0x10 [ 23.689605][ T377] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 23.689802][ T377] do_syscall_64+0xc1/0x1d0 [ 23.689960][ T377] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.690155][ T377] RIP: 0033:0x7f2c232df9a7 [ 23.690309][ T377] 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 [ 23.690840][ T377] RSP: 002b:00007fffdb9ab8a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 23.691062][ T377] RAX: ffffffffffffffda RBX: 00007fffdb9abfd0 RCX: 00007f2c232df9a7 [ 23.691287][ T377] RDX: 0000000000000000 RSI: 00007fffdb9ab910 RDI: 0000000000000005 [ 23.691507][ T377] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 23.691753][ T377] R10: 00007f2c2319def8 R11: 0000000000000246 R12: 0000000000000002 [ 23.691990][ T377] R13: 0000000067792c18 R14: 0000000000498600 R15: 0000000000000000 [ 23.692228][ T377]