[ 12.152723][ T272] ip (272) used greatest stack depth: 23552 bytes left [ 18.011534][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 18.439732][ T361] gre: GRE over IPv4 demultiplexor driver [ 18.487688][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 28.331945][ T443] GACT probability NOT on [ 45.230826][ T656] [ 45.231037][ T656] ============================================ [ 45.231250][ T656] WARNING: possible recursive locking detected [ 45.231444][ T656] 6.13.0-rc5-virtme #1 Not tainted [ 45.231594][ T656] -------------------------------------------- [ 45.231774][ T656] ip/656 is trying to acquire lock: [ 45.231920][ T656] ffffffff9f9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.232224][ T656] [ 45.232224][ T656] but task is already holding lock: [ 45.232458][ T656] ffffffff9f9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.232753][ T656] [ 45.232753][ T656] other info that might help us debug this: [ 45.232967][ T656] Possible unsafe locking scenario: [ 45.232967][ T656] [ 45.233203][ T656] CPU0 [ 45.233327][ T656] ---- [ 45.233451][ T656] lock((netdev_chain).rwsem); [ 45.233626][ T656] lock((netdev_chain).rwsem); [ 45.233775][ T656] [ 45.233775][ T656] *** DEADLOCK *** [ 45.233775][ T656] [ 45.233995][ T656] May be due to missing lock nesting notation [ 45.233995][ T656] [ 45.234210][ T656] 2 locks held by ip/656: [ 45.234323][ T656] #0: ffffffff9f9e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 45.234599][ T656] #1: ffffffff9f9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.234904][ T656] [ 45.234904][ T656] stack backtrace: [ 45.235085][ T656] CPU: 0 UID: 0 PID: 656 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 45.235306][ T656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.235488][ T656] Call Trace: [ 45.235604][ T656] [ 45.235686][ T656] dump_stack_lvl+0x82/0xd0 [ 45.235846][ T656] print_deadlock_bug+0x40a/0x650 [ 45.235999][ T656] validate_chain+0x5bf/0xae0 [ 45.236163][ T656] ? __pfx_validate_chain+0x10/0x10 [ 45.236314][ T656] ? hlock_class+0x4e/0x130 [ 45.236463][ T656] ? mark_lock+0x38/0x3e0 [ 45.236581][ T656] __lock_acquire+0xb9a/0x1680 [ 45.236734][ T656] lock_acquire.part.0+0xeb/0x330 [ 45.236898][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 45.237085][ T656] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 45.237270][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.237417][ T656] ? trace_lock_acquire+0x14c/0x1f0 [ 45.237563][ T656] ? lock_acquire+0x32/0xc0 [ 45.237717][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 45.237909][ T656] down_read+0x9f/0x340 [ 45.238030][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 45.238217][ T656] ? __pfx_down_read+0x10/0x10 [ 45.238364][ T656] ? __lock_release+0x103/0x460 [ 45.238511][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 45.238661][ T656] ? __pfx___lock_release+0x10/0x10 [ 45.238821][ T656] blocking_notifier_call_chain+0x50/0x90 [ 45.238969][ T656] __netdev_upper_dev_unlink+0xd9/0x220 [ 45.239125][ T656] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 45.239306][ T656] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 45.239456][ T656] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 45.239648][ T656] ? rtnl_is_locked+0x15/0x20 [ 45.239815][ T656] netdev_upper_dev_unlink+0x71/0xa0 [ 45.239963][ T656] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 45.240151][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 45.240298][ T656] ? mutex_is_locked+0x1c/0x60 [ 45.240448][ T656] ? rtnl_is_locked+0x15/0x20 [ 45.240595][ T656] ? netdev_master_upper_dev_get+0x13/0x120 [ 45.240779][ T656] vrf_device_event+0x78/0xe0 [vrf] [ 45.240930][ T656] notifier_call_chain+0xcd/0x150 [ 45.241082][ T656] blocking_notifier_call_chain+0x66/0x90 [ 45.241239][ T656] unregister_netdevice_many_notify+0xa7b/0x1580 [ 45.241428][ T656] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.241613][ T656] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 45.241765][ T656] ? __pfx___lock_release+0x10/0x10 [ 45.241912][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.242065][ T656] ? rtnl_is_locked+0x15/0x20 [ 45.242235][ T656] ? unregister_netdevice_queue+0x70/0x410 [ 45.242420][ T656] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 45.242608][ T656] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 45.242760][ T656] rtnl_dellink+0x348/0xa40 [ 45.242909][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.243073][ T656] ? find_held_lock+0x2c/0x110 [ 45.243243][ T656] ? __lock_release+0x103/0x460 [ 45.243395][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.243548][ T656] ? __pfx___lock_release+0x10/0x10 [ 45.243695][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.243856][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.244005][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.244154][ T656] rtnetlink_rcv_msg+0x712/0xc10 [ 45.244312][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.244465][ T656] ? hlock_class+0x4e/0x130 [ 45.244617][ T656] ? mark_lock+0x38/0x3e0 [ 45.244735][ T656] ? __lock_acquire+0xb9a/0x1680 [ 45.244892][ T656] netlink_rcv_skb+0x130/0x360 [ 45.245044][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.245199][ T656] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 45.245348][ T656] ? netlink_deliver_tap+0x13e/0x340 [ 45.245499][ T656] ? netlink_deliver_tap+0xc3/0x340 [ 45.245654][ T656] netlink_unicast+0x44b/0x710 [ 45.245804][ T656] ? __pfx_netlink_unicast+0x10/0x10 [ 45.245949][ T656] ? find_held_lock+0x2c/0x110 [ 45.246101][ T656] netlink_sendmsg+0x723/0xbe0 [ 45.246261][ T656] ? __pfx_netlink_sendmsg+0x10/0x10 [ 45.246416][ T656] ____sys_sendmsg+0x7ac/0xa10 [ 45.246567][ T656] ? __pfx_____sys_sendmsg+0x10/0x10 [ 45.246726][ T656] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 45.246920][ T656] ___sys_sendmsg+0xee/0x170 [ 45.247073][ T656] ? __pfx____sys_sendmsg+0x10/0x10 [ 45.247220][ T656] ? kasan_save_stack+0x34/0x50 [ 45.247374][ T656] ? kasan_save_stack+0x24/0x50 [ 45.247523][ T656] ? __kasan_record_aux_stack+0x8e/0xa0 [ 45.247675][ T656] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 45.247869][ T656] ? __x64_sys_close+0x7c/0xd0 [ 45.248021][ T656] ? do_syscall_64+0xc1/0x1d0 [ 45.248175][ T656] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.248368][ T656] ? __lock_acquire+0xb9a/0x1680 [ 45.248521][ T656] ? find_held_lock+0x2c/0x110 [ 45.248677][ T656] ? __lock_release+0x103/0x460 [ 45.248828][ T656] ? __virt_addr_valid+0x22b/0x430 [ 45.248989][ T656] ? __pfx___lock_release+0x10/0x10 [ 45.249143][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.249297][ T656] __sys_sendmsg+0x109/0x1a0 [ 45.249446][ T656] ? __pfx___sys_sendmsg+0x10/0x10 [ 45.249609][ T656] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 45.249821][ T656] do_syscall_64+0xc1/0x1d0 [ 45.249975][ T656] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.250170][ T656] RIP: 0033:0x7f60aee259a7 [ 45.250336][ 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 [ 45.250862][ T656] RSP: 002b:00007ffd72727878 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.251089][ T656] RAX: ffffffffffffffda RBX: 00007ffd72727fa0 RCX: 00007f60aee259a7 [ 45.251324][ T656] RDX: 0000000000000000 RSI: 00007ffd727278e0 RDI: 0000000000000005 [ 45.251552][ T656] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.251778][ T656] R10: 00007f60aece3ef8 R11: 0000000000000246 R12: 0000000000000002 [ 45.252004][ T656] R13: 0000000067795743 R14: 0000000000498600 R15: 0000000000000000 [ 45.252244][ T656]