[ 10.768354][ T249] ip (249) used greatest stack depth: 23680 bytes left [ 15.101786][ T323] gre: GRE over IPv4 demultiplexor driver [ 15.132257][ T323] ip_gre: GRE over IPv4 tunneling driver [ 16.666236][ T345] 8021q: 802.1Q VLAN Support v1.8 [ 19.425032][ T383] GACT probability NOT on [ 172.877985][ T595] [ 172.878150][ T595] ============================================ [ 172.878364][ T595] WARNING: possible recursive locking detected [ 172.878562][ T595] 6.13.0-rc5-virtme #1 Not tainted [ 172.878718][ T595] -------------------------------------------- [ 172.878913][ T595] ip/595 is trying to acquire lock: [ 172.879071][ T595] ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 172.879406][ T595] [ 172.879406][ T595] but task is already holding lock: [ 172.879635][ T595] ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 172.879958][ T595] [ 172.879958][ T595] other info that might help us debug this: [ 172.880196][ T595] Possible unsafe locking scenario: [ 172.880196][ T595] [ 172.880440][ T595] CPU0 [ 172.880561][ T595] ---- [ 172.880681][ T595] lock((netdev_chain).rwsem); [ 172.880839][ T595] lock((netdev_chain).rwsem); [ 172.881003][ T595] [ 172.881003][ T595] *** DEADLOCK *** [ 172.881003][ T595] [ 172.881244][ T595] May be due to missing lock nesting notation [ 172.881244][ T595] [ 172.881491][ T595] 2 locks held by ip/595: [ 172.881619][ T595] #0: ffffffff885e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 172.881914][ T595] #1: ffffffff885d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 172.882245][ T595] [ 172.882245][ T595] stack backtrace: [ 172.882443][ T595] CPU: 2 UID: 0 PID: 595 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 172.882693][ T595] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 172.882892][ T595] Call Trace: [ 172.883031][ T595] [ 172.883116][ T595] dump_stack_lvl+0x82/0xd0 [ 172.883281][ T595] print_deadlock_bug+0x40a/0x650 [ 172.883440][ T595] validate_chain+0x5bf/0xae0 [ 172.883602][ T595] ? __pfx_validate_chain+0x10/0x10 [ 172.883772][ T595] ? hlock_class+0x4e/0x130 [ 172.883930][ T595] ? mark_lock+0x38/0x3e0 [ 172.884054][ T595] __lock_acquire+0xb9a/0x1680 [ 172.884214][ T595] lock_acquire.part.0+0xeb/0x330 [ 172.884374][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 172.884573][ T595] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 172.884772][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 172.884930][ T595] ? trace_lock_acquire+0x14c/0x1f0 [ 172.885097][ T595] ? lock_acquire+0x32/0xc0 [ 172.885256][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 172.885455][ T595] down_read+0x9f/0x340 [ 172.885578][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 172.885777][ T595] ? __pfx_down_read+0x10/0x10 [ 172.885936][ T595] ? __lock_release+0x103/0x460 [ 172.886095][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 172.886261][ T595] ? __pfx___lock_release+0x10/0x10 [ 172.886421][ T595] blocking_notifier_call_chain+0x50/0x90 [ 172.886582][ T595] __netdev_upper_dev_unlink+0xd9/0x220 [ 172.886742][ T595] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 172.886943][ T595] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 172.887109][ T595] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 172.887313][ T595] ? rtnl_is_locked+0x15/0x20 [ 172.887478][ T595] netdev_upper_dev_unlink+0x71/0xa0 [ 172.887639][ T595] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 172.887839][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 172.887996][ T595] ? mutex_is_locked+0x1c/0x60 [ 172.888155][ T595] ? rtnl_is_locked+0x15/0x20 [ 172.888312][ T595] ? netdev_master_upper_dev_get+0x13/0x120 [ 172.888516][ T595] vrf_device_event+0x78/0xe0 [vrf] [ 172.888679][ T595] notifier_call_chain+0xcd/0x150 [ 172.888839][ T595] blocking_notifier_call_chain+0x66/0x90 [ 172.889001][ T595] unregister_netdevice_many_notify+0xa7b/0x1580 [ 172.889196][ T595] ? hlock_class+0x4e/0x130 [ 172.889351][ T595] ? mark_lock+0x38/0x3e0 [ 172.889479][ T595] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 172.889680][ T595] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 172.889878][ T595] ? kfree+0xf3/0x330 [ 172.889998][ T595] ? vlan_vid_del+0x310/0x5e0 [ 172.890159][ T595] ? vlan_vid_del+0x310/0x5e0 [ 172.890322][ T595] rtnl_dellink+0x348/0xa40 [ 172.890484][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 172.890657][ T595] ? find_held_lock+0x2c/0x110 [ 172.890821][ T595] ? __lock_release+0x103/0x460 [ 172.890991][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 172.891150][ T595] ? __pfx___lock_release+0x10/0x10 [ 172.891307][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 172.891468][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 172.891628][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 172.891790][ T595] rtnetlink_rcv_msg+0x712/0xc10 [ 172.891948][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 172.892115][ T595] ? hlock_class+0x4e/0x130 [ 172.892271][ T595] ? mark_lock+0x38/0x3e0 [ 172.892392][ T595] ? __lock_acquire+0xb9a/0x1680 [ 172.892548][ T595] netlink_rcv_skb+0x130/0x360 [ 172.892705][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 172.892862][ T595] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 172.893035][ T595] ? netlink_deliver_tap+0x13e/0x340 [ 172.893202][ T595] ? netlink_deliver_tap+0xc3/0x340 [ 172.893364][ T595] netlink_unicast+0x44b/0x710 [ 172.893524][ T595] ? __pfx_netlink_unicast+0x10/0x10 [ 172.893680][ T595] ? find_held_lock+0x2c/0x110 [ 172.893839][ T595] netlink_sendmsg+0x723/0xbe0 [ 172.893996][ T595] ? __pfx_netlink_sendmsg+0x10/0x10 [ 172.894159][ T595] ____sys_sendmsg+0x7ac/0xa10 [ 172.894325][ T595] ? __pfx_____sys_sendmsg+0x10/0x10 [ 172.894483][ T595] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 172.894683][ T595] ___sys_sendmsg+0xee/0x170 [ 172.894841][ T595] ? __pfx____sys_sendmsg+0x10/0x10 [ 172.895003][ T595] ? kasan_save_stack+0x34/0x50 [ 172.895163][ T595] ? kasan_save_stack+0x24/0x50 [ 172.895320][ T595] ? __kasan_record_aux_stack+0x8e/0xa0 [ 172.895483][ T595] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 172.895679][ T595] ? __x64_sys_close+0x7c/0xd0 [ 172.895836][ T595] ? do_syscall_64+0xc1/0x1d0 [ 172.895996][ T595] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 172.896197][ T595] ? __lock_acquire+0xb9a/0x1680 [ 172.896356][ T595] ? find_held_lock+0x2c/0x110 [ 172.896515][ T595] ? __lock_release+0x103/0x460 [ 172.896673][ T595] ? __virt_addr_valid+0x22b/0x430 [ 172.896838][ T595] ? __pfx___lock_release+0x10/0x10 [ 172.896994][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 172.897156][ T595] __sys_sendmsg+0x109/0x1a0 [ 172.897317][ T595] ? __pfx___sys_sendmsg+0x10/0x10 [ 172.897474][ T595] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 172.897673][ T595] do_syscall_64+0xc1/0x1d0 [ 172.897837][ T595] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 172.898036][ T595] RIP: 0033:0x7f25aa45e9a7 [ 172.898206][ 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 [ 172.898761][ T595] RSP: 002b:00007ffd6edc1698 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 172.899009][ T595] RAX: ffffffffffffffda RBX: 00007ffd6edc1dc0 RCX: 00007f25aa45e9a7 [ 172.899248][ T595] RDX: 0000000000000000 RSI: 00007ffd6edc1700 RDI: 0000000000000005 [ 172.899490][ T595] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 172.899731][ T595] R10: 00007f25aa31cef8 R11: 0000000000000246 R12: 0000000000000002 [ 172.899981][ T595] R13: 0000000067792cc3 R14: 0000000000498600 R15: 0000000000000000 [ 172.900223][ T595]