[ 16.014502][ T331] 8021q: 802.1Q VLAN Support v1.8 [ 16.435049][ T337] gre: GRE over IPv4 demultiplexor driver [ 16.457486][ T337] ip_gre: GRE over IPv4 tunneling driver [ 30.010128][ T440] [ 30.010276][ T440] ============================================ [ 30.010481][ T440] WARNING: possible recursive locking detected [ 30.010678][ T440] 6.13.0-rc5-virtme #1 Not tainted [ 30.010837][ T440] -------------------------------------------- [ 30.011052][ T440] ip/440 is trying to acquire lock: [ 30.011210][ T440] ffffffffa13d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.011537][ T440] [ 30.011537][ T440] but task is already holding lock: [ 30.011769][ T440] ffffffffa13d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.012091][ T440] [ 30.012091][ T440] other info that might help us debug this: [ 30.012326][ T440] Possible unsafe locking scenario: [ 30.012326][ T440] [ 30.012555][ T440] CPU0 [ 30.012674][ T440] ---- [ 30.012795][ T440] lock((netdev_chain).rwsem); [ 30.012960][ T440] lock((netdev_chain).rwsem); [ 30.013130][ T440] [ 30.013130][ T440] *** DEADLOCK *** [ 30.013130][ T440] [ 30.013367][ T440] May be due to missing lock nesting notation [ 30.013367][ T440] [ 30.013602][ T440] 2 locks held by ip/440: [ 30.013723][ T440] #0: ffffffffa13e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 30.014013][ T440] #1: ffffffffa13d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.014346][ T440] [ 30.014346][ T440] stack backtrace: [ 30.014547][ T440] CPU: 0 UID: 0 PID: 440 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 30.014788][ T440] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.014988][ T440] Call Trace: [ 30.015114][ T440] [ 30.015198][ T440] dump_stack_lvl+0x82/0xd0 [ 30.015366][ T440] print_deadlock_bug+0x40a/0x650 [ 30.015530][ T440] validate_chain+0x5bf/0xae0 [ 30.015691][ T440] ? __pfx_validate_chain+0x10/0x10 [ 30.015853][ T440] ? hlock_class+0x4e/0x130 [ 30.016013][ T440] ? mark_lock+0x38/0x3e0 [ 30.016141][ T440] __lock_acquire+0xb9a/0x1680 [ 30.016308][ T440] lock_acquire.part.0+0xeb/0x330 [ 30.016475][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 30.016680][ T440] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 30.016882][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.017044][ T440] ? trace_lock_acquire+0x14c/0x1f0 [ 30.017206][ T440] ? lock_acquire+0x32/0xc0 [ 30.017367][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 30.017568][ T440] down_read+0x9f/0x340 [ 30.017695][ T440] ? blocking_notifier_call_chain+0x50/0x90 [ 30.017896][ T440] ? __pfx_down_read+0x10/0x10 [ 30.018058][ T440] ? __lock_release+0x103/0x460 [ 30.018218][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 30.018383][ T440] ? __pfx___lock_release+0x10/0x10 [ 30.018547][ T440] blocking_notifier_call_chain+0x50/0x90 [ 30.018710][ T440] __netdev_upper_dev_unlink+0xd9/0x220 [ 30.018877][ T440] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 30.019080][ T440] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 30.019240][ T440] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 30.019442][ T440] ? rtnl_is_locked+0x15/0x20 [ 30.019606][ T440] netdev_upper_dev_unlink+0x71/0xa0 [ 30.019768][ T440] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 30.019972][ T440] ? netconsole_netdev_event+0x2c1/0x620 [ 30.020134][ T440] ? mutex_is_locked+0x1c/0x60 [ 30.020296][ T440] ? rtnl_is_locked+0x15/0x20 [ 30.020456][ T440] ? netdev_master_upper_dev_get+0x13/0x120 [ 30.020656][ T440] vrf_device_event+0x78/0xe0 [vrf] [ 30.020823][ T440] notifier_call_chain+0xcd/0x150 [ 30.020985][ T440] blocking_notifier_call_chain+0x66/0x90 [ 30.021151][ T440] unregister_netdevice_many_notify+0xa7b/0x1580 [ 30.021353][ T440] ? find_held_lock+0x2c/0x110 [ 30.021518][ T440] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.021720][ T440] ? __pfx___lock_release+0x10/0x10 [ 30.021882][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.022046][ T440] ? rtnl_is_locked+0x15/0x20 [ 30.022205][ T440] ? unregister_netdevice_queue+0x70/0x410 [ 30.022407][ T440] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.022604][ T440] ? net_generic+0xbb/0x1f0 [ 30.022769][ T440] rtnl_dellink+0x348/0xa40 [ 30.022930][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.023103][ T440] ? find_held_lock+0x2c/0x110 [ 30.023278][ T440] ? __lock_release+0x103/0x460 [ 30.023438][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.023600][ T440] ? __pfx___lock_release+0x10/0x10 [ 30.023762][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.023926][ T440] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.024085][ T440] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.024245][ T440] rtnetlink_rcv_msg+0x712/0xc10 [ 30.024404][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.024567][ T440] ? hlock_class+0x4e/0x130 [ 30.024726][ T440] ? mark_lock+0x38/0x3e0 [ 30.024848][ T440] ? __lock_acquire+0xb9a/0x1680 [ 30.025023][ T440] netlink_rcv_skb+0x130/0x360 [ 30.025193][ T440] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.025357][ T440] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 30.025534][ T440] ? netlink_deliver_tap+0x13e/0x340 [ 30.025705][ T440] ? netlink_deliver_tap+0xc3/0x340 [ 30.025877][ T440] netlink_unicast+0x44b/0x710 [ 30.026041][ T440] ? __pfx_netlink_unicast+0x10/0x10 [ 30.026201][ T440] ? find_held_lock+0x2c/0x110 [ 30.026362][ T440] netlink_sendmsg+0x723/0xbe0 [ 30.026524][ T440] ? __pfx_netlink_sendmsg+0x10/0x10 [ 30.026688][ T440] ____sys_sendmsg+0x7ac/0xa10 [ 30.026859][ T440] ? __pfx_____sys_sendmsg+0x10/0x10 [ 30.027040][ T440] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 30.027244][ T440] ___sys_sendmsg+0xee/0x170 [ 30.027408][ T440] ? __pfx____sys_sendmsg+0x10/0x10 [ 30.027581][ T440] ? kasan_save_stack+0x34/0x50 [ 30.027754][ T440] ? kasan_save_stack+0x24/0x50 [ 30.027928][ T440] ? __kasan_record_aux_stack+0x8e/0xa0 [ 30.028101][ T440] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 30.028311][ T440] ? __x64_sys_close+0x7c/0xd0 [ 30.028473][ T440] ? do_syscall_64+0xc1/0x1d0 [ 30.028634][ T440] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.028836][ T440] ? __lock_acquire+0xb9a/0x1680 [ 30.029000][ T440] ? find_held_lock+0x2c/0x110 [ 30.029164][ T440] ? __lock_release+0x103/0x460 [ 30.029324][ T440] ? __virt_addr_valid+0x22b/0x430 [ 30.029484][ T440] ? __pfx___lock_release+0x10/0x10 [ 30.029660][ T440] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.029824][ T440] __sys_sendmsg+0x109/0x1a0 [ 30.029998][ T440] ? __pfx___sys_sendmsg+0x10/0x10 [ 30.030166][ T440] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 30.030390][ T440] do_syscall_64+0xc1/0x1d0 [ 30.030567][ T440] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.030787][ T440] RIP: 0033:0x7f27e2a249a7 [ 30.030958][ T440] 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 [ 30.031551][ T440] RSP: 002b:00007ffecaf92d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 30.031796][ T440] RAX: ffffffffffffffda RBX: 00007ffecaf934c0 RCX: 00007f27e2a249a7 [ 30.032043][ T440] RDX: 0000000000000000 RSI: 00007ffecaf92e00 RDI: 0000000000000005 [ 30.032292][ T440] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 30.032532][ T440] R10: 00007f27e28e2ef8 R11: 0000000000000246 R12: 0000000000000002 [ 30.032770][ T440] R13: 0000000067790137 R14: 0000000000498600 R15: 0000000000000000 [ 30.033029][ T440]