[ 15.435595][ T327] gre: GRE over IPv4 demultiplexor driver [ 15.449133][ T327] ip_gre: GRE over IPv4 tunneling driver [ 15.509307][ T326] ip (326) used greatest stack depth: 24144 bytes left [ 17.164094][ T350] 8021q: 802.1Q VLAN Support v1.8 [ 20.223606][ T388] GACT probability NOT on [ 1323.526828][T17286] ip (17286) used greatest stack depth: 23456 bytes left [ 1325.901389][T17313] [ 1325.901542][T17313] ============================================ [ 1325.901733][T17313] WARNING: possible recursive locking detected [ 1325.901942][T17313] 6.13.0-rc5-virtme #1 Not tainted [ 1325.902100][T17313] -------------------------------------------- [ 1325.902294][T17313] ip/17313 is trying to acquire lock: [ 1325.902449][T17313] ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1325.902802][T17313] [ 1325.902802][T17313] but task is already holding lock: [ 1325.903042][T17313] ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1325.903442][T17313] [ 1325.903442][T17313] other info that might help us debug this: [ 1325.903709][T17313] Possible unsafe locking scenario: [ 1325.903709][T17313] [ 1325.903924][T17313] CPU0 [ 1325.904037][T17313] ---- [ 1325.904151][T17313] lock((netdev_chain).rwsem); [ 1325.904332][T17313] lock((netdev_chain).rwsem); [ 1325.904480][T17313] [ 1325.904480][T17313] *** DEADLOCK *** [ 1325.904480][T17313] [ 1325.904705][T17313] May be due to missing lock nesting notation [ 1325.904705][T17313] [ 1325.904927][T17313] 2 locks held by ip/17313: [ 1325.905074][T17313] #0: ffffffffaefe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1325.905342][T17313] #1: ffffffffaefd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1325.905636][T17313] [ 1325.905636][T17313] stack backtrace: [ 1325.905828][T17313] CPU: 2 UID: 0 PID: 17313 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1325.906052][T17313] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1325.906244][T17313] Call Trace: [ 1325.906359][T17313] [ 1325.906438][T17313] dump_stack_lvl+0x82/0xd0 [ 1325.906608][T17313] print_deadlock_bug+0x40a/0x650 [ 1325.906756][T17313] validate_chain+0x5bf/0xae0 [ 1325.906909][T17313] ? __pfx_validate_chain+0x10/0x10 [ 1325.907060][T17313] ? hlock_class+0x4e/0x130 [ 1325.907207][T17313] ? mark_lock+0x38/0x3e0 [ 1325.907329][T17313] __lock_acquire+0xb9a/0x1680 [ 1325.907479][T17313] lock_acquire.part.0+0xeb/0x330 [ 1325.907626][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1325.907816][T17313] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1325.908003][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1325.908150][T17313] ? trace_lock_acquire+0x14c/0x1f0 [ 1325.908299][T17313] ? lock_acquire+0x32/0xc0 [ 1325.908457][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1325.908641][T17313] down_read+0x9f/0x340 [ 1325.908756][T17313] ? blocking_notifier_call_chain+0x50/0x90 [ 1325.908943][T17313] ? __pfx_down_read+0x10/0x10 [ 1325.909088][T17313] ? __lock_release+0x103/0x460 [ 1325.909253][T17313] ? netconsole_netdev_event+0x2c1/0x620 [ 1325.909400][T17313] ? __pfx___lock_release+0x10/0x10 [ 1325.909555][T17313] blocking_notifier_call_chain+0x50/0x90 [ 1325.909702][T17313] __netdev_upper_dev_unlink+0xd9/0x220 [ 1325.909849][T17313] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1325.910034][T17313] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1325.910186][T17313] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1325.910372][T17313] ? rtnl_is_locked+0x15/0x20 [ 1325.910532][T17313] netdev_upper_dev_unlink+0x71/0xa0 [ 1325.910693][T17313] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1325.910880][T17313] ? netconsole_netdev_event+0x2c1/0x620 [ 1325.911026][T17313] ? mutex_is_locked+0x1c/0x60 [ 1325.911174][T17313] ? rtnl_is_locked+0x15/0x20 [ 1325.911323][T17313] ? netdev_master_upper_dev_get+0x13/0x120 [ 1325.911505][T17313] vrf_device_event+0x78/0xe0 [vrf] [ 1325.911653][T17313] notifier_call_chain+0xcd/0x150 [ 1325.911811][T17313] blocking_notifier_call_chain+0x66/0x90 [ 1325.911961][T17313] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1325.912141][T17313] ? hlock_class+0x4e/0x130 [ 1325.912288][T17313] ? mark_lock+0x38/0x3e0 [ 1325.912400][T17313] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1325.912581][T17313] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1325.912773][T17313] ? kfree+0xf3/0x330 [ 1325.912888][T17313] ? vlan_vid_del+0x310/0x5e0 [ 1325.913042][T17313] ? vlan_vid_del+0x310/0x5e0 [ 1325.913190][T17313] rtnl_dellink+0x348/0xa40 [ 1325.913341][T17313] ? __pfx_rtnl_dellink+0x10/0x10 [ 1325.913498][T17313] ? find_held_lock+0x2c/0x110 [ 1325.913647][T17313] ? __lock_release+0x103/0x460 [ 1325.913794][T17313] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1325.913945][T17313] ? __pfx___lock_release+0x10/0x10 [ 1325.914091][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1325.914238][T17313] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1325.914386][T17313] ? __pfx_rtnl_dellink+0x10/0x10 [ 1325.914554][T17313] rtnetlink_rcv_msg+0x712/0xc10 [ 1325.914702][T17313] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1325.914847][T17313] ? hlock_class+0x4e/0x130 [ 1325.915006][T17313] ? mark_lock+0x38/0x3e0 [ 1325.915117][T17313] ? __lock_acquire+0xb9a/0x1680 [ 1325.915265][T17313] netlink_rcv_skb+0x130/0x360 [ 1325.915416][T17313] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1325.915562][T17313] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1325.915713][T17313] ? netlink_deliver_tap+0x13e/0x340 [ 1325.915864][T17313] ? netlink_deliver_tap+0xc3/0x340 [ 1325.916017][T17313] netlink_unicast+0x44b/0x710 [ 1325.916166][T17313] ? __pfx_netlink_unicast+0x10/0x10 [ 1325.916309][T17313] ? find_held_lock+0x2c/0x110 [ 1325.916464][T17313] netlink_sendmsg+0x723/0xbe0 [ 1325.916614][T17313] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1325.916765][T17313] ____sys_sendmsg+0x7ac/0xa10 [ 1325.916912][T17313] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1325.917056][T17313] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1325.917251][T17313] ___sys_sendmsg+0xee/0x170 [ 1325.917397][T17313] ? __pfx____sys_sendmsg+0x10/0x10 [ 1325.917541][T17313] ? kasan_save_stack+0x34/0x50 [ 1325.917689][T17313] ? kasan_save_stack+0x24/0x50 [ 1325.917839][T17313] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1325.917984][T17313] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1325.918165][T17313] ? __x64_sys_close+0x7c/0xd0 [ 1325.918318][T17313] ? do_syscall_64+0xc1/0x1d0 [ 1325.918468][T17313] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1325.918649][T17313] ? __lock_acquire+0xb9a/0x1680 [ 1325.918797][T17313] ? find_held_lock+0x2c/0x110 [ 1325.918941][T17313] ? __lock_release+0x103/0x460 [ 1325.919086][T17313] ? __virt_addr_valid+0x22b/0x430 [ 1325.919247][T17313] ? __pfx___lock_release+0x10/0x10 [ 1325.919404][T17313] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1325.919570][T17313] __sys_sendmsg+0x109/0x1a0 [ 1325.919718][T17313] ? __pfx___sys_sendmsg+0x10/0x10 [ 1325.919862][T17313] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1325.920047][T17313] do_syscall_64+0xc1/0x1d0 [ 1325.920195][T17313] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1325.920375][T17313] RIP: 0033:0x7f31212539a7 [ 1325.920534][T17313] 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 [ 1325.921043][T17313] RSP: 002b:00007ffebf3689e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1325.921268][T17313] RAX: ffffffffffffffda RBX: 00007ffebf369110 RCX: 00007f31212539a7 [ 1325.921495][T17313] RDX: 0000000000000000 RSI: 00007ffebf368a50 RDI: 0000000000000005 [ 1325.921717][T17313] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1325.921938][T17313] R10: 00007f3121111ef8 R11: 0000000000000246 R12: 0000000000000002 [ 1325.922157][T17313] R13: 000000006779539a R14: 0000000000498600 R15: 0000000000000000 [ 1325.922383][T17313]