[ 11.921563][ T260] ip (260) used greatest stack depth: 23376 bytes left [ 17.219522][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 17.587399][ T341] gre: GRE over IPv4 demultiplexor driver [ 17.630142][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 27.250495][ T417] GACT probability NOT on [ 45.517063][ T634] [ 45.517247][ T634] ============================================ [ 45.517458][ T634] WARNING: possible recursive locking detected [ 45.517644][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 45.517796][ T634] -------------------------------------------- [ 45.517998][ T634] ip/634 is trying to acquire lock: [ 45.518146][ T634] ffffffff9e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.518465][ T634] [ 45.518465][ T634] but task is already holding lock: [ 45.518702][ T634] ffffffff9e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.519023][ T634] [ 45.519023][ T634] other info that might help us debug this: [ 45.519237][ T634] Possible unsafe locking scenario: [ 45.519237][ T634] [ 45.519458][ T634] CPU0 [ 45.519577][ T634] ---- [ 45.519699][ T634] lock((netdev_chain).rwsem); [ 45.519845][ T634] lock((netdev_chain).rwsem); [ 45.520005][ T634] [ 45.520005][ T634] *** DEADLOCK *** [ 45.520005][ T634] [ 45.520224][ T634] May be due to missing lock nesting notation [ 45.520224][ T634] [ 45.520436][ T634] 2 locks held by ip/634: [ 45.520548][ T634] #0: ffffffff9e3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 45.520825][ T634] #1: ffffffff9e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.521130][ T634] [ 45.521130][ T634] stack backtrace: [ 45.521313][ T634] CPU: 3 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 45.521535][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.521724][ T634] Call Trace: [ 45.521838][ T634] [ 45.521926][ T634] dump_stack_lvl+0x82/0xd0 [ 45.522080][ T634] print_deadlock_bug+0x40a/0x650 [ 45.522229][ T634] validate_chain+0x5bf/0xae0 [ 45.522378][ T634] ? __pfx_validate_chain+0x10/0x10 [ 45.522601][ T634] ? hlock_class+0x4e/0x130 [ 45.522831][ T634] ? mark_lock+0x38/0x3e0 [ 45.523023][ T634] __lock_acquire+0xb9a/0x1680 [ 45.523272][ T634] lock_acquire.part.0+0xeb/0x330 [ 45.523502][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 45.523734][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 45.523949][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.524178][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 45.524419][ T634] ? lock_acquire+0x32/0xc0 [ 45.524641][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 45.524869][ T634] down_read+0x9f/0x340 [ 45.525003][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 45.525207][ T634] ? __pfx_down_read+0x10/0x10 [ 45.525367][ T634] ? __lock_release+0x103/0x460 [ 45.525531][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 45.525700][ T634] ? __pfx___lock_release+0x10/0x10 [ 45.525869][ T634] blocking_notifier_call_chain+0x50/0x90 [ 45.526040][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 45.526205][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 45.526405][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 45.526566][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 45.526767][ T634] ? rtnl_is_locked+0x15/0x20 [ 45.526953][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 45.527179][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 45.527431][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 45.527637][ T634] ? mutex_is_locked+0x1c/0x60 [ 45.527798][ T634] ? rtnl_is_locked+0x15/0x20 [ 45.527968][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 45.528153][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 45.528307][ T634] notifier_call_chain+0xcd/0x150 [ 45.528462][ T634] blocking_notifier_call_chain+0x66/0x90 [ 45.528609][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 45.528790][ T634] ? __lock_release+0x103/0x460 [ 45.528987][ T634] ? __pfx___lock_release+0x10/0x10 [ 45.529150][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.529338][ T634] ? hlock_class+0x4e/0x130 [ 45.529485][ T634] ? mark_held_locks+0x9e/0xe0 [ 45.529641][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 45.529793][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 45.529997][ T634] rtnl_dellink+0x348/0xa40 [ 45.530160][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.530323][ T634] ? find_held_lock+0x2c/0x110 [ 45.530476][ T634] ? __lock_release+0x103/0x460 [ 45.530622][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.530776][ T634] ? __pfx___lock_release+0x10/0x10 [ 45.530933][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.531085][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.531230][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.531377][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 45.531525][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.531673][ T634] ? hlock_class+0x4e/0x130 [ 45.531825][ T634] ? mark_lock+0x38/0x3e0 [ 45.531949][ T634] ? __lock_acquire+0xb9a/0x1680 [ 45.532097][ T634] netlink_rcv_skb+0x130/0x360 [ 45.532252][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.532401][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 45.532559][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 45.532766][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 45.532971][ T634] netlink_unicast+0x44b/0x710 [ 45.533183][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 45.533400][ T634] ? find_held_lock+0x2c/0x110 [ 45.533632][ T634] netlink_sendmsg+0x723/0xbe0 [ 45.533785][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 45.533985][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 45.534203][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 45.534414][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 45.534638][ T634] ___sys_sendmsg+0xee/0x170 [ 45.534786][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 45.534967][ T634] ? kasan_save_stack+0x34/0x50 [ 45.535121][ T634] ? kasan_save_stack+0x24/0x50 [ 45.535277][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 45.535474][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 45.535719][ T634] ? __x64_sys_close+0x7c/0xd0 [ 45.535903][ T634] ? do_syscall_64+0xc1/0x1d0 [ 45.536065][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.536251][ T634] ? __lock_acquire+0xb9a/0x1680 [ 45.536402][ T634] ? find_held_lock+0x2c/0x110 [ 45.536552][ T634] ? __lock_release+0x103/0x460 [ 45.536701][ T634] ? __virt_addr_valid+0x22b/0x430 [ 45.536870][ T634] ? __pfx___lock_release+0x10/0x10 [ 45.537031][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.537198][ T634] __sys_sendmsg+0x109/0x1a0 [ 45.537348][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 45.537509][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 45.537803][ T634] do_syscall_64+0xc1/0x1d0 [ 45.538031][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.538305][ T634] RIP: 0033:0x7fc10e62b9a7 [ 45.538561][ T634] 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 [ 45.539177][ T634] RSP: 002b:00007ffdbb0087c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.539406][ T634] RAX: ffffffffffffffda RBX: 00007ffdbb008ef0 RCX: 00007fc10e62b9a7 [ 45.539643][ T634] RDX: 0000000000000000 RSI: 00007ffdbb008830 RDI: 0000000000000005 [ 45.539959][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.540302][ T634] R10: 00007fc10e4e9ef8 R11: 0000000000000246 R12: 0000000000000002 [ 45.540659][ T634] R13: 0000000067792b78 R14: 0000000000498600 R15: 0000000000000000 [ 45.541029][ T634]