[ 14.565590][ T308] 8021q: 802.1Q VLAN Support v1.8 [ 15.304969][ T319] gre: GRE over IPv4 demultiplexor driver [ 15.317619][ T319] ip_gre: GRE over IPv4 tunneling driver [ 15.621899][ T325] ip (325) used greatest stack depth: 23648 bytes left [ 20.191480][ T385] GACT probability NOT on [ 86.958542][ T678] [ 86.958721][ T678] ============================================ [ 86.958915][ T678] WARNING: possible recursive locking detected [ 86.959107][ T678] 6.13.0-rc5-virtme #1 Not tainted [ 86.959261][ T678] -------------------------------------------- [ 86.959443][ T678] ip/678 is trying to acquire lock: [ 86.959591][ T678] ffffffff903d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.959910][ T678] [ 86.959910][ T678] but task is already holding lock: [ 86.960125][ T678] ffffffff903d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.960430][ T678] [ 86.960430][ T678] other info that might help us debug this: [ 86.960652][ T678] Possible unsafe locking scenario: [ 86.960652][ T678] [ 86.960875][ T678] CPU0 [ 86.960992][ T678] ---- [ 86.961111][ T678] lock((netdev_chain).rwsem); [ 86.961263][ T678] lock((netdev_chain).rwsem); [ 86.961409][ T678] [ 86.961409][ T678] *** DEADLOCK *** [ 86.961409][ T678] [ 86.961624][ T678] May be due to missing lock nesting notation [ 86.961624][ T678] [ 86.961840][ T678] 2 locks held by ip/678: [ 86.961952][ T678] #0: ffffffff903e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 86.962224][ T678] #1: ffffffff903d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.962531][ T678] [ 86.962531][ T678] stack backtrace: [ 86.962713][ T678] CPU: 3 UID: 0 PID: 678 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 86.962937][ T678] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 86.963130][ T678] Call Trace: [ 86.963247][ T678] [ 86.963326][ T678] dump_stack_lvl+0x82/0xd0 [ 86.963484][ T678] print_deadlock_bug+0x40a/0x650 [ 86.963636][ T678] validate_chain+0x5bf/0xae0 [ 86.963788][ T678] ? __pfx_validate_chain+0x10/0x10 [ 86.963939][ T678] ? hlock_class+0x4e/0x130 [ 86.964088][ T678] ? mark_lock+0x38/0x3e0 [ 86.964203][ T678] __lock_acquire+0xb9a/0x1680 [ 86.964359][ T678] lock_acquire.part.0+0xeb/0x330 [ 86.964506][ T678] ? blocking_notifier_call_chain+0x50/0x90 [ 86.964695][ T678] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 86.964884][ T678] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.965033][ T678] ? trace_lock_acquire+0x14c/0x1f0 [ 86.965180][ T678] ? lock_acquire+0x32/0xc0 [ 86.965331][ T678] ? blocking_notifier_call_chain+0x50/0x90 [ 86.965518][ T678] down_read+0x9f/0x340 [ 86.965634][ T678] ? blocking_notifier_call_chain+0x50/0x90 [ 86.965817][ T678] ? __pfx_down_read+0x10/0x10 [ 86.965964][ T678] ? __lock_release+0x103/0x460 [ 86.966120][ T678] ? netconsole_netdev_event+0x2c1/0x620 [ 86.966266][ T678] ? __pfx___lock_release+0x10/0x10 [ 86.966416][ T678] blocking_notifier_call_chain+0x50/0x90 [ 86.966571][ T678] __netdev_upper_dev_unlink+0xd9/0x220 [ 86.966720][ T678] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 86.966904][ T678] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 86.967054][ T678] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 86.967239][ T678] ? rtnl_is_locked+0x15/0x20 [ 86.967395][ T678] netdev_upper_dev_unlink+0x71/0xa0 [ 86.967547][ T678] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 86.967733][ T678] ? netconsole_netdev_event+0x2c1/0x620 [ 86.967881][ T678] ? mutex_is_locked+0x1c/0x60 [ 86.968047][ T678] ? rtnl_is_locked+0x15/0x20 [ 86.968197][ T678] ? netdev_master_upper_dev_get+0x13/0x120 [ 86.968384][ T678] vrf_device_event+0x78/0xe0 [vrf] [ 86.968540][ T678] notifier_call_chain+0xcd/0x150 [ 86.968697][ T678] blocking_notifier_call_chain+0x66/0x90 [ 86.968844][ T678] unregister_netdevice_many_notify+0xa7b/0x1580 [ 86.969028][ T678] ? hlock_class+0x4e/0x130 [ 86.969178][ T678] ? mark_lock+0x38/0x3e0 [ 86.969292][ T678] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 86.969479][ T678] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 86.969662][ T678] ? kfree+0xf3/0x330 [ 86.969778][ T678] ? vlan_vid_del+0x310/0x5e0 [ 86.969930][ T678] ? vlan_vid_del+0x310/0x5e0 [ 86.970087][ T678] rtnl_dellink+0x348/0xa40 [ 86.970247][ T678] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.970411][ T678] ? find_held_lock+0x2c/0x110 [ 86.970560][ T678] ? __lock_release+0x103/0x460 [ 86.970708][ T678] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.970862][ T678] ? __pfx___lock_release+0x10/0x10 [ 86.971010][ T678] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.971167][ T678] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.971315][ T678] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.971460][ T678] rtnetlink_rcv_msg+0x712/0xc10 [ 86.971611][ T678] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.971757][ T678] ? hlock_class+0x4e/0x130 [ 86.971903][ T678] ? mark_lock+0x38/0x3e0 [ 86.972023][ T678] ? __lock_acquire+0xb9a/0x1680 [ 86.972172][ T678] netlink_rcv_skb+0x130/0x360 [ 86.972325][ T678] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.972484][ T678] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 86.972638][ T678] ? netlink_deliver_tap+0x13e/0x340 [ 86.972786][ T678] ? netlink_deliver_tap+0xc3/0x340 [ 86.972932][ T678] netlink_unicast+0x44b/0x710 [ 86.973091][ T678] ? __pfx_netlink_unicast+0x10/0x10 [ 86.973238][ T678] ? find_held_lock+0x2c/0x110 [ 86.973388][ T678] netlink_sendmsg+0x723/0xbe0 [ 86.973537][ T678] ? __pfx_netlink_sendmsg+0x10/0x10 [ 86.973686][ T678] ____sys_sendmsg+0x7ac/0xa10 [ 86.973835][ T678] ? __pfx_____sys_sendmsg+0x10/0x10 [ 86.973980][ T678] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 86.974176][ T678] ___sys_sendmsg+0xee/0x170 [ 86.974323][ T678] ? __pfx____sys_sendmsg+0x10/0x10 [ 86.974472][ T678] ? kasan_save_stack+0x34/0x50 [ 86.974628][ T678] ? kasan_save_stack+0x24/0x50 [ 86.974775][ T678] ? __kasan_record_aux_stack+0x8e/0xa0 [ 86.974927][ T678] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 86.975118][ T678] ? __x64_sys_close+0x7c/0xd0 [ 86.975274][ T678] ? do_syscall_64+0xc1/0x1d0 [ 86.975427][ T678] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.975619][ T678] ? __lock_acquire+0xb9a/0x1680 [ 86.975773][ T678] ? find_held_lock+0x2c/0x110 [ 86.975922][ T678] ? __lock_release+0x103/0x460 [ 86.976072][ T678] ? __virt_addr_valid+0x22b/0x430 [ 86.976225][ T678] ? __pfx___lock_release+0x10/0x10 [ 86.976376][ T678] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.976523][ T678] __sys_sendmsg+0x109/0x1a0 [ 86.976669][ T678] ? __pfx___sys_sendmsg+0x10/0x10 [ 86.976816][ T678] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 86.977003][ T678] do_syscall_64+0xc1/0x1d0 [ 86.977150][ T678] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.977333][ T678] RIP: 0033:0x7f2f657ad9a7 [ 86.977497][ T678] 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 [ 86.978013][ T678] RSP: 002b:00007ffdbb2d5508 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 86.978238][ T678] RAX: ffffffffffffffda RBX: 00007ffdbb2d5c30 RCX: 00007f2f657ad9a7 [ 86.978469][ T678] RDX: 0000000000000000 RSI: 00007ffdbb2d5570 RDI: 0000000000000005 [ 86.978691][ T678] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 86.978912][ T678] R10: 00007f2f6566bef8 R11: 0000000000000246 R12: 0000000000000002 [ 86.979140][ T678] R13: 0000000067792a7c R14: 0000000000498600 R15: 0000000000000000 [ 86.979465][ T678] [ 87.000128][ T678] ip (678) used greatest stack depth: 23160 bytes left