[ 14.342406][ T308] 8021q: 802.1Q VLAN Support v1.8 [ 15.211989][ T319] gre: GRE over IPv4 demultiplexor driver [ 15.235559][ T319] ip_gre: GRE over IPv4 tunneling driver [ 20.288326][ T386] GACT probability NOT on [ 84.282102][ T679] [ 84.282328][ T679] ============================================ [ 84.282529][ T679] WARNING: possible recursive locking detected [ 84.282713][ T679] 6.13.0-rc5-virtme #1 Not tainted [ 84.282865][ T679] -------------------------------------------- [ 84.283048][ T679] ip/679 is trying to acquire lock: [ 84.283193][ T679] ffffffffae5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.283506][ T679] [ 84.283506][ T679] but task is already holding lock: [ 84.283731][ T679] ffffffffae5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.284024][ T679] [ 84.284024][ T679] other info that might help us debug this: [ 84.284244][ T679] Possible unsafe locking scenario: [ 84.284244][ T679] [ 84.284463][ T679] CPU0 [ 84.284581][ T679] ---- [ 84.284692][ T679] lock((netdev_chain).rwsem); [ 84.284841][ T679] lock((netdev_chain).rwsem); [ 84.284990][ T679] [ 84.284990][ T679] *** DEADLOCK *** [ 84.284990][ T679] [ 84.285208][ T679] May be due to missing lock nesting notation [ 84.285208][ T679] [ 84.285423][ T679] 2 locks held by ip/679: [ 84.285546][ T679] #0: ffffffffae5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 84.285825][ T679] #1: ffffffffae5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.286120][ T679] [ 84.286120][ T679] stack backtrace: [ 84.286340][ T679] CPU: 0 UID: 0 PID: 679 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 84.286562][ T679] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 84.286754][ T679] Call Trace: [ 84.286868][ T679] [ 84.286946][ T679] dump_stack_lvl+0x82/0xd0 [ 84.287102][ T679] print_deadlock_bug+0x40a/0x650 [ 84.287253][ T679] validate_chain+0x5bf/0xae0 [ 84.287406][ T679] ? __pfx_validate_chain+0x10/0x10 [ 84.287557][ T679] ? hlock_class+0x4e/0x130 [ 84.287705][ T679] ? mark_lock+0x38/0x3e0 [ 84.287823][ T679] __lock_acquire+0xb9a/0x1680 [ 84.287975][ T679] lock_acquire.part.0+0xeb/0x330 [ 84.288121][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 84.288303][ T679] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 84.288491][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.288637][ T679] ? trace_lock_acquire+0x14c/0x1f0 [ 84.288784][ T679] ? lock_acquire+0x32/0xc0 [ 84.288935][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 84.289117][ T679] down_read+0x9f/0x340 [ 84.289227][ T679] ? blocking_notifier_call_chain+0x50/0x90 [ 84.289408][ T679] ? __pfx_down_read+0x10/0x10 [ 84.289552][ T679] ? __lock_release+0x103/0x460 [ 84.289701][ T679] ? netconsole_netdev_event+0x2c1/0x620 [ 84.289848][ T679] ? __pfx___lock_release+0x10/0x10 [ 84.289998][ T679] blocking_notifier_call_chain+0x50/0x90 [ 84.290146][ T679] __netdev_upper_dev_unlink+0xd9/0x220 [ 84.290298][ T679] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 84.290479][ T679] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 84.290626][ T679] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 84.290820][ T679] ? rtnl_is_locked+0x15/0x20 [ 84.290969][ T679] netdev_upper_dev_unlink+0x71/0xa0 [ 84.291119][ T679] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 84.291299][ T679] ? netconsole_netdev_event+0x2c1/0x620 [ 84.291449][ T679] ? mutex_is_locked+0x1c/0x60 [ 84.291597][ T679] ? rtnl_is_locked+0x15/0x20 [ 84.291742][ T679] ? netdev_master_upper_dev_get+0x13/0x120 [ 84.291923][ T679] vrf_device_event+0x78/0xe0 [vrf] [ 84.292083][ T679] notifier_call_chain+0xcd/0x150 [ 84.292233][ T679] blocking_notifier_call_chain+0x66/0x90 [ 84.292383][ T679] unregister_netdevice_many_notify+0xa7b/0x1580 [ 84.292566][ T679] ? hlock_class+0x4e/0x130 [ 84.292714][ T679] ? mark_lock+0x38/0x3e0 [ 84.292829][ T679] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 84.293012][ T679] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 84.293204][ T679] ? kfree+0xf3/0x330 [ 84.293318][ T679] ? vlan_vid_del+0x310/0x5e0 [ 84.293470][ T679] ? vlan_vid_del+0x310/0x5e0 [ 84.293619][ T679] rtnl_dellink+0x348/0xa40 [ 84.293768][ T679] ? __pfx_rtnl_dellink+0x10/0x10 [ 84.293930][ T679] ? find_held_lock+0x2c/0x110 [ 84.294079][ T679] ? __lock_release+0x103/0x460 [ 84.294226][ T679] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 84.294379][ T679] ? __pfx___lock_release+0x10/0x10 [ 84.294525][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.294676][ T679] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 84.294821][ T679] ? __pfx_rtnl_dellink+0x10/0x10 [ 84.294975][ T679] rtnetlink_rcv_msg+0x712/0xc10 [ 84.295123][ T679] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 84.295269][ T679] ? hlock_class+0x4e/0x130 [ 84.295416][ T679] ? mark_lock+0x38/0x3e0 [ 84.295529][ T679] ? __lock_acquire+0xb9a/0x1680 [ 84.295679][ T679] netlink_rcv_skb+0x130/0x360 [ 84.295832][ T679] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 84.295979][ T679] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 84.296129][ T679] ? netlink_deliver_tap+0x13e/0x340 [ 84.296282][ T679] ? netlink_deliver_tap+0xc3/0x340 [ 84.296434][ T679] netlink_unicast+0x44b/0x710 [ 84.296585][ T679] ? __pfx_netlink_unicast+0x10/0x10 [ 84.296732][ T679] ? find_held_lock+0x2c/0x110 [ 84.296885][ T679] netlink_sendmsg+0x723/0xbe0 [ 84.297036][ T679] ? __pfx_netlink_sendmsg+0x10/0x10 [ 84.297186][ T679] ____sys_sendmsg+0x7ac/0xa10 [ 84.297334][ T679] ? __pfx_____sys_sendmsg+0x10/0x10 [ 84.297486][ T679] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 84.297678][ T679] ___sys_sendmsg+0xee/0x170 [ 84.297829][ T679] ? __pfx____sys_sendmsg+0x10/0x10 [ 84.297978][ T679] ? kasan_save_stack+0x34/0x50 [ 84.298132][ T679] ? kasan_save_stack+0x24/0x50 [ 84.298279][ T679] ? __kasan_record_aux_stack+0x8e/0xa0 [ 84.298429][ T679] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 84.298625][ T679] ? __x64_sys_close+0x7c/0xd0 [ 84.298774][ T679] ? do_syscall_64+0xc1/0x1d0 [ 84.298923][ T679] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.299113][ T679] ? __lock_acquire+0xb9a/0x1680 [ 84.299264][ T679] ? find_held_lock+0x2c/0x110 [ 84.299413][ T679] ? __lock_release+0x103/0x460 [ 84.299563][ T679] ? __virt_addr_valid+0x22b/0x430 [ 84.299711][ T679] ? __pfx___lock_release+0x10/0x10 [ 84.299866][ T679] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.300014][ T679] __sys_sendmsg+0x109/0x1a0 [ 84.300160][ T679] ? __pfx___sys_sendmsg+0x10/0x10 [ 84.300304][ T679] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 84.300495][ T679] do_syscall_64+0xc1/0x1d0 [ 84.300646][ T679] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.300838][ T679] RIP: 0033:0x7efccba1d9a7 [ 84.300998][ T679] 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 [ 84.301511][ T679] RSP: 002b:00007ffe031942d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 84.301740][ T679] RAX: ffffffffffffffda RBX: 00007ffe03194a00 RCX: 00007efccba1d9a7 [ 84.301964][ T679] RDX: 0000000000000000 RSI: 00007ffe03194340 RDI: 0000000000000005 [ 84.302186][ T679] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 84.302405][ T679] R10: 00007efccb8dbef8 R11: 0000000000000246 R12: 0000000000000002 [ 84.302625][ T679] R13: 0000000067792dce R14: 0000000000498600 R15: 0000000000000000 [ 84.302853][ T679]