[ 16.989585][ T338] 8021q: 802.1Q VLAN Support v1.8 [ 17.406060][ T343] gre: GRE over IPv4 demultiplexor driver [ 17.451556][ T343] ip6_gre: GRE over IPv6 tunneling driver [ 17.610001][ T346] ip (346) used greatest stack depth: 23296 bytes left [ 27.173120][ T418] GACT probability NOT on [ 44.517193][ T635] [ 44.517375][ T635] ============================================ [ 44.517584][ T635] WARNING: possible recursive locking detected [ 44.517789][ T635] 6.13.0-rc5-virtme #1 Not tainted [ 44.517962][ T635] -------------------------------------------- [ 44.518168][ T635] ip/635 is trying to acquire lock: [ 44.518330][ T635] ffffffff8f5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.518671][ T635] [ 44.518671][ T635] but task is already holding lock: [ 44.518917][ T635] ffffffff8f5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.519244][ T635] [ 44.519244][ T635] other info that might help us debug this: [ 44.519491][ T635] Possible unsafe locking scenario: [ 44.519491][ T635] [ 44.519726][ T635] CPU0 [ 44.519852][ T635] ---- [ 44.519976][ T635] lock((netdev_chain).rwsem); [ 44.520148][ T635] lock((netdev_chain).rwsem); [ 44.520312][ T635] [ 44.520312][ T635] *** DEADLOCK *** [ 44.520312][ T635] [ 44.520546][ T635] May be due to missing lock nesting notation [ 44.520546][ T635] [ 44.520783][ T635] 2 locks held by ip/635: [ 44.520907][ T635] #0: ffffffff8f5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.521204][ T635] #1: ffffffff8f5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.521529][ T635] [ 44.521529][ T635] stack backtrace: [ 44.521730][ T635] CPU: 3 UID: 0 PID: 635 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.521971][ T635] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.522173][ T635] Call Trace: [ 44.522299][ T635] [ 44.522384][ T635] dump_stack_lvl+0x82/0xd0 [ 44.522553][ T635] print_deadlock_bug+0x40a/0x650 [ 44.522718][ T635] validate_chain+0x5bf/0xae0 [ 44.522881][ T635] ? __pfx_validate_chain+0x10/0x10 [ 44.523051][ T635] ? hlock_class+0x4e/0x130 [ 44.523212][ T635] ? mark_lock+0x38/0x3e0 [ 44.523336][ T635] __lock_acquire+0xb9a/0x1680 [ 44.523500][ T635] lock_acquire.part.0+0xeb/0x330 [ 44.523663][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 44.523865][ T635] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.524070][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.524231][ T635] ? trace_lock_acquire+0x14c/0x1f0 [ 44.524394][ T635] ? lock_acquire+0x32/0xc0 [ 44.524557][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 44.524764][ T635] down_read+0x9f/0x340 [ 44.524887][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 44.525087][ T635] ? __pfx_down_read+0x10/0x10 [ 44.525247][ T635] ? __lock_release+0x103/0x460 [ 44.525408][ T635] ? netconsole_netdev_event+0x2c1/0x620 [ 44.525567][ T635] ? __pfx___lock_release+0x10/0x10 [ 44.525728][ T635] blocking_notifier_call_chain+0x50/0x90 [ 44.525897][ T635] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.526062][ T635] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.526264][ T635] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.526425][ T635] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.526637][ T635] ? rtnl_is_locked+0x15/0x20 [ 44.526785][ T635] netdev_upper_dev_unlink+0x71/0xa0 [ 44.526983][ T635] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.527186][ T635] ? netconsole_netdev_event+0x2c1/0x620 [ 44.527344][ T635] ? mutex_is_locked+0x1c/0x60 [ 44.527505][ T635] ? rtnl_is_locked+0x15/0x20 [ 44.527662][ T635] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.527858][ T635] vrf_device_event+0x78/0xe0 [vrf] [ 44.528021][ T635] notifier_call_chain+0xcd/0x150 [ 44.528180][ T635] blocking_notifier_call_chain+0x66/0x90 [ 44.528345][ T635] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.528546][ T635] ? __lock_release+0x103/0x460 [ 44.528704][ T635] ? __pfx___lock_release+0x10/0x10 [ 44.528864][ T635] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.529062][ T635] ? hlock_class+0x4e/0x130 [ 44.529220][ T635] ? mark_held_locks+0x9e/0xe0 [ 44.529381][ T635] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 44.529551][ T635] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 44.529758][ T635] rtnl_dellink+0x348/0xa40 [ 44.529919][ T635] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.530094][ T635] ? find_held_lock+0x2c/0x110 [ 44.530256][ T635] ? __lock_release+0x103/0x460 [ 44.530418][ T635] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.530577][ T635] ? __pfx___lock_release+0x10/0x10 [ 44.530742][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.530906][ T635] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.531069][ T635] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.531234][ T635] rtnetlink_rcv_msg+0x712/0xc10 [ 44.531394][ T635] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.531555][ T635] ? hlock_class+0x4e/0x130 [ 44.531714][ T635] ? mark_lock+0x38/0x3e0 [ 44.531848][ T635] ? __lock_acquire+0xb9a/0x1680 [ 44.532009][ T635] netlink_rcv_skb+0x130/0x360 [ 44.532170][ T635] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.532332][ T635] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.532497][ T635] ? netlink_deliver_tap+0x13e/0x340 [ 44.532658][ T635] ? netlink_deliver_tap+0xc3/0x340 [ 44.532826][ T635] netlink_unicast+0x44b/0x710 [ 44.532993][ T635] ? __pfx_netlink_unicast+0x10/0x10 [ 44.533155][ T635] ? find_held_lock+0x2c/0x110 [ 44.533318][ T635] netlink_sendmsg+0x723/0xbe0 [ 44.533480][ T635] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.533647][ T635] ____sys_sendmsg+0x7ac/0xa10 [ 44.533807][ T635] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.533965][ T635] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.534172][ T635] ___sys_sendmsg+0xee/0x170 [ 44.534335][ T635] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.534496][ T635] ? kasan_save_stack+0x34/0x50 [ 44.534657][ T635] ? kasan_save_stack+0x24/0x50 [ 44.534819][ T635] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.534988][ T635] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.535188][ T635] ? __x64_sys_close+0x7c/0xd0 [ 44.535350][ T635] ? do_syscall_64+0xc1/0x1d0 [ 44.535511][ T635] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.535717][ T635] ? __lock_acquire+0xb9a/0x1680 [ 44.535879][ T635] ? find_held_lock+0x2c/0x110 [ 44.536041][ T635] ? __lock_release+0x103/0x460 [ 44.536198][ T635] ? __virt_addr_valid+0x22b/0x430 [ 44.536360][ T635] ? __pfx___lock_release+0x10/0x10 [ 44.536544][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.536710][ T635] __sys_sendmsg+0x109/0x1a0 [ 44.536870][ T635] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.537034][ T635] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.537237][ T635] do_syscall_64+0xc1/0x1d0 [ 44.537396][ T635] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.537592][ T635] RIP: 0033:0x7fc3f3c329a7 [ 44.537760][ T635] 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 [ 44.538326][ T635] RSP: 002b:00007ffdadea2aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.538577][ T635] RAX: ffffffffffffffda RBX: 00007ffdadea31d0 RCX: 00007fc3f3c329a7 [ 44.538828][ T635] RDX: 0000000000000000 RSI: 00007ffdadea2b10 RDI: 0000000000000005 [ 44.539071][ T635] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.539313][ T635] R10: 00007fc3f3af0ef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.539559][ T635] R13: 00000000677900c8 R14: 0000000000498600 R15: 0000000000000000 [ 44.539801][ T635]