[ 10.796224][ T249] ip (249) used greatest stack depth: 23880 bytes left [ 11.895179][ T277] ip (277) used greatest stack depth: 23648 bytes left [ 15.139684][ T323] gre: GRE over IPv4 demultiplexor driver [ 15.179999][ T323] ip6_gre: GRE over IPv6 tunneling driver [ 16.616450][ T345] 8021q: 802.1Q VLAN Support v1.8 [ 19.439390][ T383] GACT probability NOT on [ 167.209000][ T595] [ 167.209172][ T595] ============================================ [ 167.209387][ T595] WARNING: possible recursive locking detected [ 167.209590][ T595] 6.13.0-rc5-virtme #1 Not tainted [ 167.209751][ T595] -------------------------------------------- [ 167.209947][ T595] ip/595 is trying to acquire lock: [ 167.210107][ T595] ffffffff89fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 167.210453][ T595] [ 167.210453][ T595] but task is already holding lock: [ 167.210687][ T595] ffffffff89fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 167.211010][ T595] [ 167.211010][ T595] other info that might help us debug this: [ 167.211246][ T595] Possible unsafe locking scenario: [ 167.211246][ T595] [ 167.211480][ T595] CPU0 [ 167.211602][ T595] ---- [ 167.211724][ T595] lock((netdev_chain).rwsem); [ 167.211885][ T595] lock((netdev_chain).rwsem); [ 167.212050][ T595] [ 167.212050][ T595] *** DEADLOCK *** [ 167.212050][ T595] [ 167.212290][ T595] May be due to missing lock nesting notation [ 167.212290][ T595] [ 167.212520][ T595] 2 locks held by ip/595: [ 167.212641][ T595] #0: ffffffff89fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 167.212932][ T595] #1: ffffffff89fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 167.213255][ T595] [ 167.213255][ T595] stack backtrace: [ 167.213454][ T595] CPU: 3 UID: 0 PID: 595 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 167.213695][ T595] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 167.213894][ T595] Call Trace: [ 167.214019][ T595] [ 167.214103][ T595] dump_stack_lvl+0x82/0xd0 [ 167.214267][ T595] print_deadlock_bug+0x40a/0x650 [ 167.214428][ T595] validate_chain+0x5bf/0xae0 [ 167.214595][ T595] ? __pfx_validate_chain+0x10/0x10 [ 167.214756][ T595] ? hlock_class+0x4e/0x130 [ 167.214918][ T595] ? mark_lock+0x38/0x3e0 [ 167.215040][ T595] __lock_acquire+0xb9a/0x1680 [ 167.215203][ T595] lock_acquire.part.0+0xeb/0x330 [ 167.215371][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 167.215571][ T595] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 167.215776][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 167.215936][ T595] ? trace_lock_acquire+0x14c/0x1f0 [ 167.216094][ T595] ? lock_acquire+0x32/0xc0 [ 167.216255][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 167.216463][ T595] down_read+0x9f/0x340 [ 167.216584][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 167.216783][ T595] ? __pfx_down_read+0x10/0x10 [ 167.216947][ T595] ? __lock_release+0x103/0x460 [ 167.217104][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 167.217265][ T595] ? __pfx___lock_release+0x10/0x10 [ 167.217425][ T595] blocking_notifier_call_chain+0x50/0x90 [ 167.217585][ T595] __netdev_upper_dev_unlink+0xd9/0x220 [ 167.217742][ T595] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 167.217942][ T595] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 167.218109][ T595] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 167.218311][ T595] ? rtnl_is_locked+0x15/0x20 [ 167.218475][ T595] netdev_upper_dev_unlink+0x71/0xa0 [ 167.218634][ T595] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 167.218832][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 167.218992][ T595] ? mutex_is_locked+0x1c/0x60 [ 167.219154][ T595] ? rtnl_is_locked+0x15/0x20 [ 167.219479][ T595] ? netdev_master_upper_dev_get+0x13/0x120 [ 167.219678][ T595] vrf_device_event+0x78/0xe0 [vrf] [ 167.219841][ T595] notifier_call_chain+0xcd/0x150 [ 167.220006][ T595] blocking_notifier_call_chain+0x66/0x90 [ 167.220167][ T595] unregister_netdevice_many_notify+0xa7b/0x1580 [ 167.220366][ T595] ? hlock_class+0x4e/0x130 [ 167.220523][ T595] ? mark_lock+0x38/0x3e0 [ 167.220647][ T595] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 167.220843][ T595] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 167.221045][ T595] ? kfree+0xf3/0x330 [ 167.221167][ T595] ? vlan_vid_del+0x310/0x5e0 [ 167.221327][ T595] ? vlan_vid_del+0x310/0x5e0 [ 167.221491][ T595] rtnl_dellink+0x348/0xa40 [ 167.221653][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 167.221831][ T595] ? find_held_lock+0x2c/0x110 [ 167.221992][ T595] ? __lock_release+0x103/0x460 [ 167.222151][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 167.222308][ T595] ? __pfx___lock_release+0x10/0x10 [ 167.222470][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 167.222631][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 167.222791][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 167.222955][ T595] rtnetlink_rcv_msg+0x712/0xc10 [ 167.223115][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 167.223273][ T595] ? hlock_class+0x4e/0x130 [ 167.223438][ T595] ? mark_lock+0x38/0x3e0 [ 167.223561][ T595] ? __lock_acquire+0xb9a/0x1680 [ 167.223719][ T595] netlink_rcv_skb+0x130/0x360 [ 167.223878][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 167.224038][ T595] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 167.224206][ T595] ? netlink_deliver_tap+0x13e/0x340 [ 167.224366][ T595] ? netlink_deliver_tap+0xc3/0x340 [ 167.224524][ T595] netlink_unicast+0x44b/0x710 [ 167.224684][ T595] ? __pfx_netlink_unicast+0x10/0x10 [ 167.224843][ T595] ? find_held_lock+0x2c/0x110 [ 167.225004][ T595] netlink_sendmsg+0x723/0xbe0 [ 167.225163][ T595] ? __pfx_netlink_sendmsg+0x10/0x10 [ 167.225331][ T595] ____sys_sendmsg+0x7ac/0xa10 [ 167.225498][ T595] ? __pfx_____sys_sendmsg+0x10/0x10 [ 167.225656][ T595] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 167.225858][ T595] ___sys_sendmsg+0xee/0x170 [ 167.226019][ T595] ? __pfx____sys_sendmsg+0x10/0x10 [ 167.226179][ T595] ? kasan_save_stack+0x34/0x50 [ 167.226349][ T595] ? kasan_save_stack+0x24/0x50 [ 167.226515][ T595] ? __kasan_record_aux_stack+0x8e/0xa0 [ 167.226679][ T595] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 167.226879][ T595] ? __x64_sys_close+0x7c/0xd0 [ 167.227034][ T595] ? do_syscall_64+0xc1/0x1d0 [ 167.227194][ T595] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 167.227396][ T595] ? __lock_acquire+0xb9a/0x1680 [ 167.227561][ T595] ? find_held_lock+0x2c/0x110 [ 167.227725][ T595] ? __lock_release+0x103/0x460 [ 167.227886][ T595] ? __virt_addr_valid+0x22b/0x430 [ 167.228047][ T595] ? __pfx___lock_release+0x10/0x10 [ 167.228206][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 167.228367][ T595] __sys_sendmsg+0x109/0x1a0 [ 167.228528][ T595] ? __pfx___sys_sendmsg+0x10/0x10 [ 167.228694][ T595] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 167.228901][ T595] do_syscall_64+0xc1/0x1d0 [ 167.229059][ T595] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 167.229259][ T595] RIP: 0033:0x7f38b8c3f9a7 [ 167.229428][ T595] 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 [ 167.229994][ T595] RSP: 002b:00007ffdbc101f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 167.230240][ T595] RAX: ffffffffffffffda RBX: 00007ffdbc1026c0 RCX: 00007f38b8c3f9a7 [ 167.230480][ T595] RDX: 0000000000000000 RSI: 00007ffdbc102000 RDI: 0000000000000005 [ 167.230718][ T595] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 167.230962][ T595] R10: 00007f38b8afdef8 R11: 0000000000000246 R12: 0000000000000002 [ 167.231203][ T595] R13: 000000006779022c R14: 0000000000498600 R15: 0000000000000000 [ 167.231448][ T595] [ 167.253182][ T595] ip (595) used greatest stack depth: 23504 bytes left