[ 10.561678][ T248] ip (248) used greatest stack depth: 23248 bytes left [ 14.185146][ T314] 8021q: 802.1Q VLAN Support v1.8 [ 14.581014][ T319] gre: GRE over IPv4 demultiplexor driver [ 14.597821][ T319] ip_gre: GRE over IPv4 tunneling driver [ 31.943743][ T417] [ 31.943911][ T417] ============================================ [ 31.944145][ T417] WARNING: possible recursive locking detected [ 31.944370][ T417] 6.13.0-rc5-virtme #1 Not tainted [ 31.944555][ T417] -------------------------------------------- [ 31.944775][ T417] ip/417 is trying to acquire lock: [ 31.944959][ T417] ffffffff873d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 31.945334][ T417] [ 31.945334][ T417] but task is already holding lock: [ 31.945605][ T417] ffffffff873d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 31.945983][ T417] [ 31.945983][ T417] other info that might help us debug this: [ 31.946250][ T417] Possible unsafe locking scenario: [ 31.946250][ T417] [ 31.946516][ T417] CPU0 [ 31.946653][ T417] ---- [ 31.946791][ T417] lock((netdev_chain).rwsem); [ 31.946976][ T417] lock((netdev_chain).rwsem); [ 31.947158][ T417] [ 31.947158][ T417] *** DEADLOCK *** [ 31.947158][ T417] [ 31.947433][ T417] May be due to missing lock nesting notation [ 31.947433][ T417] [ 31.947704][ T417] 2 locks held by ip/417: [ 31.947846][ T417] #0: ffffffff873e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 31.948175][ T417] #1: ffffffff873d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 31.948568][ T417] [ 31.948568][ T417] stack backtrace: [ 31.948798][ T417] CPU: 0 UID: 0 PID: 417 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 31.949076][ T417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 31.949311][ T417] Call Trace: [ 31.949453][ T417] [ 31.949549][ T417] dump_stack_lvl+0x82/0xd0 [ 31.949739][ T417] print_deadlock_bug+0x40a/0x650 [ 31.949924][ T417] validate_chain+0x5bf/0xae0 [ 31.950110][ T417] ? __pfx_validate_chain+0x10/0x10 [ 31.950298][ T417] ? hlock_class+0x4e/0x130 [ 31.950482][ T417] ? mark_lock+0x38/0x3e0 [ 31.950624][ T417] __lock_acquire+0xb9a/0x1680 [ 31.950817][ T417] lock_acquire.part.0+0xeb/0x330 [ 31.951000][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 31.951233][ T417] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 31.951463][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.951650][ T417] ? trace_lock_acquire+0x14c/0x1f0 [ 31.951836][ T417] ? lock_acquire+0x32/0xc0 [ 31.952019][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 31.952254][ T417] down_read+0x9f/0x340 [ 31.952392][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 31.952621][ T417] ? __pfx_down_read+0x10/0x10 [ 31.952804][ T417] ? __lock_release+0x103/0x460 [ 31.952985][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 31.953170][ T417] ? __pfx___lock_release+0x10/0x10 [ 31.953355][ T417] blocking_notifier_call_chain+0x50/0x90 [ 31.953539][ T417] __netdev_upper_dev_unlink+0xd9/0x220 [ 31.953725][ T417] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 31.953951][ T417] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 31.954130][ T417] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 31.954353][ T417] ? rtnl_is_locked+0x15/0x20 [ 31.954539][ T417] netdev_upper_dev_unlink+0x71/0xa0 [ 31.954728][ T417] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 31.954961][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 31.955146][ T417] ? mutex_is_locked+0x1c/0x60 [ 31.955334][ T417] ? rtnl_is_locked+0x15/0x20 [ 31.955516][ T417] ? netdev_master_upper_dev_get+0x13/0x120 [ 31.955744][ T417] vrf_device_event+0x78/0xe0 [vrf] [ 31.955932][ T417] notifier_call_chain+0xcd/0x150 [ 31.956121][ T417] blocking_notifier_call_chain+0x66/0x90 [ 31.956307][ T417] unregister_netdevice_many_notify+0xa7b/0x1580 [ 31.956533][ T417] ? __lock_release+0x103/0x460 [ 31.956718][ T417] ? __pfx___lock_release+0x10/0x10 [ 31.956906][ T417] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 31.957132][ T417] ? hlock_class+0x4e/0x130 [ 31.957314][ T417] ? mark_held_locks+0x9e/0xe0 [ 31.957499][ T417] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 31.957686][ T417] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 31.957917][ T417] rtnl_dellink+0x348/0xa40 [ 31.958102][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 31.958313][ T417] ? find_held_lock+0x2c/0x110 [ 31.958501][ T417] ? __lock_release+0x103/0x460 [ 31.958685][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 31.958874][ T417] ? __pfx___lock_release+0x10/0x10 [ 31.959061][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.959249][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 31.959435][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 31.959621][ T417] rtnetlink_rcv_msg+0x712/0xc10 [ 31.959806][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 31.959989][ T417] ? hlock_class+0x4e/0x130 [ 31.960185][ T417] ? mark_lock+0x38/0x3e0 [ 31.960326][ T417] ? __lock_acquire+0xb9a/0x1680 [ 31.960509][ T417] netlink_rcv_skb+0x130/0x360 [ 31.960694][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 31.960878][ T417] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 31.961064][ T417] ? netlink_deliver_tap+0x13e/0x340 [ 31.961251][ T417] ? netlink_deliver_tap+0xc3/0x340 [ 31.961440][ T417] netlink_unicast+0x44b/0x710 [ 31.961624][ T417] ? __pfx_netlink_unicast+0x10/0x10 [ 31.961809][ T417] ? find_held_lock+0x2c/0x110 [ 31.961995][ T417] netlink_sendmsg+0x723/0xbe0 [ 31.962180][ T417] ? __pfx_netlink_sendmsg+0x10/0x10 [ 31.962366][ T417] ____sys_sendmsg+0x7ac/0xa10 [ 31.962549][ T417] ? __pfx_____sys_sendmsg+0x10/0x10 [ 31.962732][ T417] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 31.962965][ T417] ___sys_sendmsg+0xee/0x170 [ 31.963151][ T417] ? __pfx____sys_sendmsg+0x10/0x10 [ 31.963337][ T417] ? kasan_save_stack+0x34/0x50 [ 31.963521][ T417] ? kasan_save_stack+0x24/0x50 [ 31.963701][ T417] ? __kasan_record_aux_stack+0x8e/0xa0 [ 31.963888][ T417] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 31.964120][ T417] ? __x64_sys_close+0x7c/0xd0 [ 31.964308][ T417] ? do_syscall_64+0xc1/0x1d0 [ 31.964492][ T417] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.964724][ T417] ? __lock_acquire+0xb9a/0x1680 [ 31.964910][ T417] ? find_held_lock+0x2c/0x110 [ 31.965096][ T417] ? __lock_release+0x103/0x460 [ 31.965278][ T417] ? __virt_addr_valid+0x22b/0x430 [ 31.965465][ T417] ? __pfx___lock_release+0x10/0x10 [ 31.965653][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.965838][ T417] __sys_sendmsg+0x109/0x1a0 [ 31.966020][ T417] ? __pfx___sys_sendmsg+0x10/0x10 [ 31.966203][ T417] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 31.966435][ T417] do_syscall_64+0xc1/0x1d0 [ 31.966619][ T417] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.966846][ T417] RIP: 0033:0x7f56e120e9a7 [ 31.967041][ 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 [ 31.967680][ T417] RSP: 002b:00007ffe59507568 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 31.967963][ T417] RAX: ffffffffffffffda RBX: 00007ffe59507c90 RCX: 00007f56e120e9a7 [ 31.968256][ T417] RDX: 0000000000000000 RSI: 00007ffe595075d0 RDI: 0000000000000005 [ 31.968532][ T417] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 31.968808][ T417] R10: 00007f56e10ccef8 R11: 0000000000000246 R12: 0000000000000002 [ 31.969082][ T417] R13: 00000000677904a5 R14: 0000000000498600 R15: 0000000000000000 [ 31.969363][ T417]