[ 10.889997][ T249] ip (249) used greatest stack depth: 24104 bytes left [ 14.698800][ T313] 8021q: 802.1Q VLAN Support v1.8 [ 15.052320][ T318] gre: GRE over IPv4 demultiplexor driver [ 15.067197][ T318] ip_gre: GRE over IPv4 tunneling driver [ 32.507311][ T417] [ 32.507567][ T417] ============================================ [ 32.507753][ T417] WARNING: possible recursive locking detected [ 32.507932][ T417] 6.13.0-rc5-virtme #1 Not tainted [ 32.508079][ T417] -------------------------------------------- [ 32.508254][ T417] ip/417 is trying to acquire lock: [ 32.508397][ T417] ffffffffb5dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.508699][ T417] [ 32.508699][ T417] but task is already holding lock: [ 32.508906][ T417] ffffffffb5dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.509194][ T417] [ 32.509194][ T417] other info that might help us debug this: [ 32.509412][ T417] Possible unsafe locking scenario: [ 32.509412][ T417] [ 32.509626][ T417] CPU0 [ 32.509736][ T417] ---- [ 32.509843][ T417] lock((netdev_chain).rwsem); [ 32.509989][ T417] lock((netdev_chain).rwsem); [ 32.510133][ T417] [ 32.510133][ T417] *** DEADLOCK *** [ 32.510133][ T417] [ 32.510347][ T417] May be due to missing lock nesting notation [ 32.510347][ T417] [ 32.510557][ T417] 2 locks held by ip/417: [ 32.510670][ T417] #0: ffffffffb5de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.510936][ T417] #1: ffffffffb5dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.511233][ T417] [ 32.511233][ T417] stack backtrace: [ 32.511410][ T417] CPU: 2 UID: 0 PID: 417 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.511625][ T417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.511805][ T417] Call Trace: [ 32.511915][ T417] [ 32.511992][ T417] dump_stack_lvl+0x82/0xd0 [ 32.512146][ T417] print_deadlock_bug+0x40a/0x650 [ 32.512292][ T417] validate_chain+0x5bf/0xae0 [ 32.512438][ T417] ? __pfx_validate_chain+0x10/0x10 [ 32.512585][ T417] ? hlock_class+0x4e/0x130 [ 32.512729][ T417] ? mark_lock+0x38/0x3e0 [ 32.512839][ T417] __lock_acquire+0xb9a/0x1680 [ 32.512985][ T417] lock_acquire.part.0+0xeb/0x330 [ 32.513155][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.513341][ T417] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.513523][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.513668][ T417] ? trace_lock_acquire+0x14c/0x1f0 [ 32.513814][ T417] ? lock_acquire+0x32/0xc0 [ 32.513956][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.514137][ T417] down_read+0x9f/0x340 [ 32.514248][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.514433][ T417] ? __pfx_down_read+0x10/0x10 [ 32.514577][ T417] ? __lock_release+0x103/0x460 [ 32.514721][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 32.514866][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.515012][ T417] blocking_notifier_call_chain+0x50/0x90 [ 32.515156][ T417] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.515306][ T417] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.515495][ T417] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.515655][ T417] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.515836][ T417] ? rtnl_is_locked+0x15/0x20 [ 32.515982][ T417] netdev_upper_dev_unlink+0x71/0xa0 [ 32.516128][ T417] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.516306][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 32.516456][ T417] ? mutex_is_locked+0x1c/0x60 [ 32.516600][ T417] ? rtnl_is_locked+0x15/0x20 [ 32.516745][ T417] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.516922][ T417] vrf_device_event+0x78/0xe0 [vrf] [ 32.517069][ T417] notifier_call_chain+0xcd/0x150 [ 32.517215][ T417] blocking_notifier_call_chain+0x66/0x90 [ 32.517361][ T417] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.517546][ T417] ? __lock_release+0x103/0x460 [ 32.517692][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.517840][ T417] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.518021][ T417] ? hlock_class+0x4e/0x130 [ 32.518166][ T417] ? mark_held_locks+0x9e/0xe0 [ 32.518309][ T417] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.518457][ T417] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.518649][ T417] rtnl_dellink+0x348/0xa40 [ 32.518794][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.518951][ T417] ? find_held_lock+0x2c/0x110 [ 32.519097][ T417] ? __lock_release+0x103/0x460 [ 32.519241][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.519383][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.519527][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.519681][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.519824][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.519970][ T417] rtnetlink_rcv_msg+0x712/0xc10 [ 32.520115][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.520261][ T417] ? hlock_class+0x4e/0x130 [ 32.520404][ T417] ? mark_lock+0x38/0x3e0 [ 32.520524][ T417] ? __lock_acquire+0xb9a/0x1680 [ 32.520686][ T417] netlink_rcv_skb+0x130/0x360 [ 32.520832][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.520976][ T417] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.521125][ T417] ? netlink_deliver_tap+0x13e/0x340 [ 32.521270][ T417] ? netlink_deliver_tap+0xc3/0x340 [ 32.521418][ T417] netlink_unicast+0x44b/0x710 [ 32.521561][ T417] ? __pfx_netlink_unicast+0x10/0x10 [ 32.521711][ T417] ? find_held_lock+0x2c/0x110 [ 32.521856][ T417] netlink_sendmsg+0x723/0xbe0 [ 32.522001][ T417] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.522148][ T417] ____sys_sendmsg+0x7ac/0xa10 [ 32.522294][ T417] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.522437][ T417] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.522624][ T417] ___sys_sendmsg+0xee/0x170 [ 32.522774][ T417] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.522918][ T417] ? kasan_save_stack+0x34/0x50 [ 32.523063][ T417] ? kasan_save_stack+0x24/0x50 [ 32.523207][ T417] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.523351][ T417] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.523533][ T417] ? __x64_sys_close+0x7c/0xd0 [ 32.523678][ T417] ? do_syscall_64+0xc1/0x1d0 [ 32.523823][ T417] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.524008][ T417] ? __lock_acquire+0xb9a/0x1680 [ 32.524154][ T417] ? find_held_lock+0x2c/0x110 [ 32.524301][ T417] ? __lock_release+0x103/0x460 [ 32.524445][ T417] ? __virt_addr_valid+0x22b/0x430 [ 32.524591][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.524734][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.524883][ T417] __sys_sendmsg+0x109/0x1a0 [ 32.525031][ T417] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.525177][ T417] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.525362][ T417] do_syscall_64+0xc1/0x1d0 [ 32.525517][ T417] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.525697][ T417] RIP: 0033:0x7fd63d4dc9a7 [ 32.525852][ T417] 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 [ 32.526367][ T417] RSP: 002b:00007ffd7ddeb4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.526592][ T417] RAX: ffffffffffffffda RBX: 00007ffd7ddebbf0 RCX: 00007fd63d4dc9a7 [ 32.526812][ T417] RDX: 0000000000000000 RSI: 00007ffd7ddeb530 RDI: 0000000000000005 [ 32.527037][ T417] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.527258][ T417] R10: 00007fd63d39aef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.527475][ T417] R13: 00000000677904e1 R14: 0000000000498600 R15: 0000000000000000 [ 32.527698][ T417] [ 32.551091][ T417] ip (417) used greatest stack depth: 24008 bytes left