[ 10.564919][ T249] ip (249) used greatest stack depth: 23248 bytes left [ 14.004737][ T309] 8021q: 802.1Q VLAN Support v1.8 [ 14.811632][ T320] gre: GRE over IPv4 demultiplexor driver [ 14.838327][ T320] ip_gre: GRE over IPv4 tunneling driver [ 19.605500][ T387] GACT probability NOT on [ 84.241727][ T680] [ 84.241945][ T680] ============================================ [ 84.242146][ T680] WARNING: possible recursive locking detected [ 84.242332][ T680] 6.13.0-rc5-virtme #1 Not tainted [ 84.242478][ T680] -------------------------------------------- [ 84.242655][ T680] ip/680 is trying to acquire lock: [ 84.242801][ T680] ffffffff987d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.243111][ T680] [ 84.243111][ T680] but task is already holding lock: [ 84.243340][ T680] ffffffff987d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.243632][ T680] [ 84.243632][ T680] other info that might help us debug this: [ 84.243860][ T680] Possible unsafe locking scenario: [ 84.243860][ T680] [ 84.244079][ T680] CPU0 [ 84.244190][ T680] ---- [ 84.244306][ T680] lock((netdev_chain).rwsem); [ 84.244454][ T680] lock((netdev_chain).rwsem); [ 84.244606][ T680] [ 84.244606][ T680] *** DEADLOCK *** [ 84.244606][ T680] [ 84.244817][ T680] May be due to missing lock nesting notation [ 84.244817][ T680] [ 84.245030][ T680] 2 locks held by ip/680: [ 84.245141][ T680] #0: ffffffff987e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 84.245412][ T680] #1: ffffffff987d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 84.245710][ T680] [ 84.245710][ T680] stack backtrace: [ 84.245889][ T680] CPU: 3 UID: 0 PID: 680 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 84.246111][ T680] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 84.246296][ T680] Call Trace: [ 84.246409][ T680] [ 84.246488][ T680] dump_stack_lvl+0x82/0xd0 [ 84.246645][ T680] print_deadlock_bug+0x40a/0x650 [ 84.246795][ T680] validate_chain+0x5bf/0xae0 [ 84.246942][ T680] ? __pfx_validate_chain+0x10/0x10 [ 84.247092][ T680] ? hlock_class+0x4e/0x130 [ 84.247242][ T680] ? mark_lock+0x38/0x3e0 [ 84.247353][ T680] __lock_acquire+0xb9a/0x1680 [ 84.247500][ T680] lock_acquire.part.0+0xeb/0x330 [ 84.247650][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 84.247839][ T680] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 84.248025][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.248171][ T680] ? trace_lock_acquire+0x14c/0x1f0 [ 84.248317][ T680] ? lock_acquire+0x32/0xc0 [ 84.248462][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 84.248646][ T680] down_read+0x9f/0x340 [ 84.248763][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 84.248945][ T680] ? __pfx_down_read+0x10/0x10 [ 84.249090][ T680] ? __lock_release+0x103/0x460 [ 84.249235][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 84.249381][ T680] ? __pfx___lock_release+0x10/0x10 [ 84.249533][ T680] blocking_notifier_call_chain+0x50/0x90 [ 84.249680][ T680] __netdev_upper_dev_unlink+0xd9/0x220 [ 84.249830][ T680] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 84.250010][ T680] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 84.250158][ T680] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 84.250339][ T680] ? rtnl_is_locked+0x15/0x20 [ 84.250486][ T680] netdev_upper_dev_unlink+0x71/0xa0 [ 84.250632][ T680] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 84.250813][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 84.250965][ T680] ? mutex_is_locked+0x1c/0x60 [ 84.251113][ T680] ? rtnl_is_locked+0x15/0x20 [ 84.251267][ T680] ? netdev_master_upper_dev_get+0x13/0x120 [ 84.251446][ T680] vrf_device_event+0x78/0xe0 [vrf] [ 84.251599][ T680] notifier_call_chain+0xcd/0x150 [ 84.251752][ T680] blocking_notifier_call_chain+0x66/0x90 [ 84.251901][ T680] unregister_netdevice_many_notify+0xa7b/0x1580 [ 84.252085][ T680] ? hlock_class+0x4e/0x130 [ 84.252230][ T680] ? mark_lock+0x38/0x3e0 [ 84.252343][ T680] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 84.252526][ T680] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 84.252713][ T680] ? kfree+0xf3/0x330 [ 84.252827][ T680] ? vlan_vid_del+0x310/0x5e0 [ 84.252980][ T680] ? vlan_vid_del+0x310/0x5e0 [ 84.253133][ T680] rtnl_dellink+0x348/0xa40 [ 84.253282][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 84.253443][ T680] ? find_held_lock+0x2c/0x110 [ 84.253590][ T680] ? __lock_release+0x103/0x460 [ 84.253748][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 84.253902][ T680] ? __pfx___lock_release+0x10/0x10 [ 84.254048][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.254198][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 84.254344][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 84.254490][ T680] rtnetlink_rcv_msg+0x712/0xc10 [ 84.254636][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 84.254784][ T680] ? hlock_class+0x4e/0x130 [ 84.254929][ T680] ? mark_lock+0x38/0x3e0 [ 84.255041][ T680] ? __lock_acquire+0xb9a/0x1680 [ 84.255191][ T680] netlink_rcv_skb+0x130/0x360 [ 84.255343][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 84.255492][ T680] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 84.255642][ T680] ? netlink_deliver_tap+0x13e/0x340 [ 84.255791][ T680] ? netlink_deliver_tap+0xc3/0x340 [ 84.255941][ T680] netlink_unicast+0x44b/0x710 [ 84.256089][ T680] ? __pfx_netlink_unicast+0x10/0x10 [ 84.256240][ T680] ? find_held_lock+0x2c/0x110 [ 84.256388][ T680] netlink_sendmsg+0x723/0xbe0 [ 84.256533][ T680] ? __pfx_netlink_sendmsg+0x10/0x10 [ 84.256682][ T680] ____sys_sendmsg+0x7ac/0xa10 [ 84.256829][ T680] ? __pfx_____sys_sendmsg+0x10/0x10 [ 84.256977][ T680] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 84.257162][ T680] ___sys_sendmsg+0xee/0x170 [ 84.257309][ T680] ? __pfx____sys_sendmsg+0x10/0x10 [ 84.257463][ T680] ? kasan_save_stack+0x34/0x50 [ 84.257611][ T680] ? kasan_save_stack+0x24/0x50 [ 84.257756][ T680] ? __kasan_record_aux_stack+0x8e/0xa0 [ 84.257904][ T680] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 84.258087][ T680] ? __x64_sys_close+0x7c/0xd0 [ 84.258235][ T680] ? do_syscall_64+0xc1/0x1d0 [ 84.258384][ T680] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.258573][ T680] ? __lock_acquire+0xb9a/0x1680 [ 84.258720][ T680] ? find_held_lock+0x2c/0x110 [ 84.258867][ T680] ? __lock_release+0x103/0x460 [ 84.259014][ T680] ? __virt_addr_valid+0x22b/0x430 [ 84.259162][ T680] ? __pfx___lock_release+0x10/0x10 [ 84.259313][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.259463][ T680] __sys_sendmsg+0x109/0x1a0 [ 84.259618][ T680] ? __pfx___sys_sendmsg+0x10/0x10 [ 84.259764][ T680] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 84.259950][ T680] do_syscall_64+0xc1/0x1d0 [ 84.260099][ T680] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.260285][ T680] RIP: 0033:0x7f7d90f4d9a7 [ 84.260440][ T680] 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 [ 84.260964][ T680] RSP: 002b:00007fffc0262508 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 84.261190][ T680] RAX: ffffffffffffffda RBX: 00007fffc0262c30 RCX: 00007f7d90f4d9a7 [ 84.261412][ T680] RDX: 0000000000000000 RSI: 00007fffc0262570 RDI: 0000000000000005 [ 84.261637][ T680] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 84.261858][ T680] R10: 00007f7d90e0bef8 R11: 0000000000000246 R12: 0000000000000002 [ 84.262078][ T680] R13: 000000006779035a R14: 0000000000498600 R15: 0000000000000000 [ 84.262301][ T680]