[ 10.894954][ T249] ip (249) used greatest stack depth: 24336 bytes left [ 16.314661][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 16.690740][ T341] gre: GRE over IPv4 demultiplexor driver [ 16.742992][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 16.880406][ T345] ip (345) used greatest stack depth: 23832 bytes left [ 18.790580][ T371] ip (371) used greatest stack depth: 23144 bytes left [ 26.257698][ T417] GACT probability NOT on [ 42.968687][ T634] [ 42.968904][ T634] ============================================ [ 42.969226][ T634] WARNING: possible recursive locking detected [ 42.969530][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 42.969777][ T634] -------------------------------------------- [ 42.970089][ T634] ip/634 is trying to acquire lock: [ 42.970341][ T634] ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.970848][ T634] [ 42.970848][ T634] but task is already holding lock: [ 42.971220][ T634] ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.971733][ T634] [ 42.971733][ T634] other info that might help us debug this: [ 42.972069][ T634] Possible unsafe locking scenario: [ 42.972069][ T634] [ 42.972405][ T634] CPU0 [ 42.972577][ T634] ---- [ 42.972752][ T634] lock((netdev_chain).rwsem); [ 42.972981][ T634] lock((netdev_chain).rwsem); [ 42.973210][ T634] [ 42.973210][ T634] *** DEADLOCK *** [ 42.973210][ T634] [ 42.973548][ T634] May be due to missing lock nesting notation [ 42.973548][ T634] [ 42.973884][ T634] 2 locks held by ip/634: [ 42.974062][ T634] #0: ffffffff87de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 42.974490][ T634] #1: ffffffff87dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.974978][ T634] [ 42.974978][ T634] stack backtrace: [ 42.975257][ T634] CPU: 3 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 42.975609][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.975897][ T634] Call Trace: [ 42.976073][ T634] [ 42.976190][ T634] dump_stack_lvl+0x82/0xd0 [ 42.976435][ T634] print_deadlock_bug+0x40a/0x650 [ 42.976668][ T634] validate_chain+0x5bf/0xae0 [ 42.976907][ T634] ? __pfx_validate_chain+0x10/0x10 [ 42.977143][ T634] ? hlock_class+0x4e/0x130 [ 42.977374][ T634] ? mark_lock+0x38/0x3e0 [ 42.977553][ T634] __lock_acquire+0xb9a/0x1680 [ 42.977806][ T634] lock_acquire.part.0+0xeb/0x330 [ 42.978054][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.978371][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 42.978685][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.978927][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 42.979159][ T634] ? lock_acquire+0x32/0xc0 [ 42.979390][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.979684][ T634] down_read+0x9f/0x340 [ 42.979865][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.980161][ T634] ? __pfx_down_read+0x10/0x10 [ 42.980382][ T634] ? __lock_release+0x103/0x460 [ 42.980545][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 42.980693][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.980841][ T634] blocking_notifier_call_chain+0x50/0x90 [ 42.980988][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 42.981135][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 42.981326][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 42.981484][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 42.981667][ T634] ? rtnl_is_locked+0x15/0x20 [ 42.981829][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 42.981983][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 42.982164][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 42.982317][ T634] ? mutex_is_locked+0x1c/0x60 [ 42.982515][ T634] ? rtnl_is_locked+0x15/0x20 [ 42.982749][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 42.982996][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 42.983148][ T634] notifier_call_chain+0xcd/0x150 [ 42.983298][ T634] blocking_notifier_call_chain+0x66/0x90 [ 42.983457][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 42.983649][ T634] ? __lock_release+0x103/0x460 [ 42.983804][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.983952][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 42.984137][ T634] ? hlock_class+0x4e/0x130 [ 42.984286][ T634] ? mark_held_locks+0x9e/0xe0 [ 42.984446][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 42.984600][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 42.984793][ T634] rtnl_dellink+0x348/0xa40 [ 42.984946][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.985109][ T634] ? find_held_lock+0x2c/0x110 [ 42.985260][ T634] ? __lock_release+0x103/0x460 [ 42.985415][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.985564][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.985711][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.985870][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.986019][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.986168][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 42.986318][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.986507][ T634] ? hlock_class+0x4e/0x130 [ 42.986740][ T634] ? mark_lock+0x38/0x3e0 [ 42.986906][ T634] ? __lock_acquire+0xb9a/0x1680 [ 42.987054][ T634] netlink_rcv_skb+0x130/0x360 [ 42.987213][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.987364][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 42.987528][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 42.987676][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 42.987828][ T634] netlink_unicast+0x44b/0x710 [ 42.987978][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 42.988134][ T634] ? find_held_lock+0x2c/0x110 [ 42.988284][ T634] netlink_sendmsg+0x723/0xbe0 [ 42.988442][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 42.988599][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 42.988745][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 42.988894][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 42.989083][ T634] ___sys_sendmsg+0xee/0x170 [ 42.989232][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 42.989393][ T634] ? kasan_save_stack+0x34/0x50 [ 42.989549][ T634] ? kasan_save_stack+0x24/0x50 [ 42.989694][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 42.989843][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 42.990027][ T634] ? __x64_sys_close+0x7c/0xd0 [ 42.990176][ T634] ? do_syscall_64+0xc1/0x1d0 [ 42.990322][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.990563][ T634] ? __lock_acquire+0xb9a/0x1680 [ 42.990712][ T634] ? find_held_lock+0x2c/0x110 [ 42.990860][ T634] ? __lock_release+0x103/0x460 [ 42.991006][ T634] ? __virt_addr_valid+0x22b/0x430 [ 42.991156][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.991302][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.991458][ T634] __sys_sendmsg+0x109/0x1a0 [ 42.991615][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 42.991764][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 42.991962][ T634] do_syscall_64+0xc1/0x1d0 [ 42.992109][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.992293][ T634] RIP: 0033:0x7f7398b5d9a7 [ 42.992458][ T634] 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 [ 42.992984][ T634] RSP: 002b:00007ffe7926cec8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.993205][ T634] RAX: ffffffffffffffda RBX: 00007ffe7926d5f0 RCX: 00007f7398b5d9a7 [ 42.993440][ T634] RDX: 0000000000000000 RSI: 00007ffe7926cf30 RDI: 0000000000000005 [ 42.993667][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.993887][ T634] R10: 00007f7398a1bef8 R11: 0000000000000246 R12: 0000000000000002 [ 42.994108][ T634] R13: 000000006779045f R14: 0000000000498600 R15: 0000000000000000 [ 42.994333][ T634]