[ 11.416883][ T260] ip (260) used greatest stack depth: 24528 bytes left [ 14.684521][ T312] 8021q: 802.1Q VLAN Support v1.8 [ 15.046330][ T317] gre: GRE over IPv4 demultiplexor driver [ 15.060567][ T317] ip_gre: GRE over IPv4 tunneling driver [ 15.231192][ T321] ip (321) used greatest stack depth: 24016 bytes left [ 32.097830][ T412] ip (412) used greatest stack depth: 23240 bytes left [ 32.385098][ T415] [ 32.385238][ T415] ============================================ [ 32.385470][ T415] WARNING: possible recursive locking detected [ 32.385672][ T415] 6.13.0-rc5-virtme #1 Not tainted [ 32.385829][ T415] -------------------------------------------- [ 32.386037][ T415] ip/415 is trying to acquire lock: [ 32.386208][ T415] ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.386557][ T415] [ 32.386557][ T415] but task is already holding lock: [ 32.386806][ T415] ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.387165][ T415] [ 32.387165][ T415] other info that might help us debug this: [ 32.387426][ T415] Possible unsafe locking scenario: [ 32.387426][ T415] [ 32.387687][ T415] CPU0 [ 32.387818][ T415] ---- [ 32.387951][ T415] lock((netdev_chain).rwsem); [ 32.388134][ T415] lock((netdev_chain).rwsem); [ 32.388313][ T415] [ 32.388313][ T415] *** DEADLOCK *** [ 32.388313][ T415] [ 32.388595][ T415] May be due to missing lock nesting notation [ 32.388595][ T415] [ 32.388863][ T415] 2 locks held by ip/415: [ 32.388997][ T415] #0: ffffffffacde7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.389290][ T415] #1: ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.389630][ T415] [ 32.389630][ T415] stack backtrace: [ 32.389830][ T415] CPU: 3 UID: 0 PID: 415 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.390074][ T415] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.390287][ T415] Call Trace: [ 32.390422][ T415] [ 32.390507][ T415] dump_stack_lvl+0x82/0xd0 [ 32.390700][ T415] print_deadlock_bug+0x40a/0x650 [ 32.390877][ T415] validate_chain+0x5bf/0xae0 [ 32.391064][ T415] ? __pfx_validate_chain+0x10/0x10 [ 32.391231][ T415] ? hlock_class+0x4e/0x130 [ 32.391404][ T415] ? mark_lock+0x38/0x3e0 [ 32.391546][ T415] __lock_acquire+0xb9a/0x1680 [ 32.391711][ T415] lock_acquire.part.0+0xeb/0x330 [ 32.391874][ T415] ? blocking_notifier_call_chain+0x50/0x90 [ 32.392075][ T415] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.392290][ T415] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.392474][ T415] ? trace_lock_acquire+0x14c/0x1f0 [ 32.392674][ T415] ? lock_acquire+0x32/0xc0 [ 32.392852][ T415] ? blocking_notifier_call_chain+0x50/0x90 [ 32.393072][ T415] down_read+0x9f/0x340 [ 32.393195][ T415] ? blocking_notifier_call_chain+0x50/0x90 [ 32.393399][ T415] ? __pfx_down_read+0x10/0x10 [ 32.393571][ T415] ? __lock_release+0x103/0x460 [ 32.393734][ T415] ? netconsole_netdev_event+0x2c1/0x620 [ 32.393902][ T415] ? __pfx___lock_release+0x10/0x10 [ 32.394070][ T415] blocking_notifier_call_chain+0x50/0x90 [ 32.394231][ T415] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.394394][ T415] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.394594][ T415] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.394756][ T415] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.394961][ T415] ? rtnl_is_locked+0x15/0x20 [ 32.395123][ T415] netdev_upper_dev_unlink+0x71/0xa0 [ 32.395284][ T415] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.395501][ T415] ? netconsole_netdev_event+0x2c1/0x620 [ 32.395664][ T415] ? mutex_is_locked+0x1c/0x60 [ 32.395826][ T415] ? rtnl_is_locked+0x15/0x20 [ 32.395987][ T415] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.396191][ T415] vrf_device_event+0x78/0xe0 [vrf] [ 32.396352][ T415] notifier_call_chain+0xcd/0x150 [ 32.396550][ T415] blocking_notifier_call_chain+0x66/0x90 [ 32.396713][ T415] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.396923][ T415] ? __lock_release+0x103/0x460 [ 32.397085][ T415] ? __pfx___lock_release+0x10/0x10 [ 32.397251][ T415] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.397476][ T415] ? hlock_class+0x4e/0x130 [ 32.397646][ T415] ? mark_held_locks+0x9e/0xe0 [ 32.397806][ T415] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.397980][ T415] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.398190][ T415] rtnl_dellink+0x348/0xa40 [ 32.398367][ T415] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.398547][ T415] ? find_held_lock+0x2c/0x110 [ 32.398714][ T415] ? __lock_release+0x103/0x460 [ 32.398877][ T415] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.399051][ T415] ? __pfx___lock_release+0x10/0x10 [ 32.399210][ T415] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.399375][ T415] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.399536][ T415] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.399697][ T415] rtnetlink_rcv_msg+0x712/0xc10 [ 32.399869][ T415] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.400034][ T415] ? hlock_class+0x4e/0x130 [ 32.400201][ T415] ? mark_lock+0x38/0x3e0 [ 32.400326][ T415] ? __lock_acquire+0xb9a/0x1680 [ 32.400497][ T415] netlink_rcv_skb+0x130/0x360 [ 32.400716][ T415] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.400891][ T415] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.401055][ T415] ? netlink_deliver_tap+0x13e/0x340 [ 32.401233][ T415] ? netlink_deliver_tap+0xc3/0x340 [ 32.401407][ T415] netlink_unicast+0x44b/0x710 [ 32.401579][ T415] ? __pfx_netlink_unicast+0x10/0x10 [ 32.401740][ T415] ? find_held_lock+0x2c/0x110 [ 32.401907][ T415] netlink_sendmsg+0x723/0xbe0 [ 32.402077][ T415] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.402241][ T415] ____sys_sendmsg+0x7ac/0xa10 [ 32.402427][ T415] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.402588][ T415] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.402791][ T415] ___sys_sendmsg+0xee/0x170 [ 32.402951][ T415] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.403115][ T415] ? kasan_save_stack+0x34/0x50 [ 32.403289][ T415] ? kasan_save_stack+0x24/0x50 [ 32.403456][ T415] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.403625][ T415] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.403825][ T415] ? __x64_sys_close+0x7c/0xd0 [ 32.403998][ T415] ? do_syscall_64+0xc1/0x1d0 [ 32.404158][ T415] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.404361][ T415] ? __lock_acquire+0xb9a/0x1680 [ 32.404556][ T415] ? find_held_lock+0x2c/0x110 [ 32.404719][ T415] ? __lock_release+0x103/0x460 [ 32.404884][ T415] ? __virt_addr_valid+0x22b/0x430 [ 32.405046][ T415] ? __pfx___lock_release+0x10/0x10 [ 32.405221][ T415] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.405388][ T415] __sys_sendmsg+0x109/0x1a0 [ 32.405561][ T415] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.405729][ T415] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.405932][ T415] do_syscall_64+0xc1/0x1d0 [ 32.406108][ T415] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.406307][ T415] RIP: 0033:0x7f7adc87a9a7 [ 32.406494][ T415] 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 [ 32.407080][ T415] RSP: 002b:00007fff064543e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.407329][ T415] RAX: ffffffffffffffda RBX: 00007fff06454b10 RCX: 00007f7adc87a9a7 [ 32.407577][ T415] RDX: 0000000000000000 RSI: 00007fff06454450 RDI: 0000000000000005 [ 32.407825][ T415] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.408062][ T415] R10: 00007f7adc738ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.408317][ T415] R13: 0000000067792f6c R14: 0000000000498600 R15: 0000000000000000 [ 32.408591][ T415]