[ 10.711421][ T258] ip (258) used greatest stack depth: 22728 bytes left [ 16.722124][ T353] 8021q: 802.1Q VLAN Support v1.8 [ 17.161249][ T359] gre: GRE over IPv4 demultiplexor driver [ 17.210331][ T359] ip6_gre: GRE over IPv6 tunneling driver [ 26.922317][ T441] GACT probability NOT on [ 43.198461][ T655] [ 43.198615][ T655] ============================================ [ 43.198799][ T655] WARNING: possible recursive locking detected [ 43.198978][ T655] 6.13.0-rc5-virtme #1 Not tainted [ 43.199121][ T655] -------------------------------------------- [ 43.199304][ T655] ip/655 is trying to acquire lock: [ 43.199456][ T655] ffffffffa6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.199762][ T655] [ 43.199762][ T655] but task is already holding lock: [ 43.199981][ T655] ffffffffa6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.200272][ T655] [ 43.200272][ T655] other info that might help us debug this: [ 43.200486][ T655] Possible unsafe locking scenario: [ 43.200486][ T655] [ 43.200702][ T655] CPU0 [ 43.200811][ T655] ---- [ 43.200920][ T655] lock((netdev_chain).rwsem); [ 43.201072][ T655] lock((netdev_chain).rwsem); [ 43.201218][ T655] [ 43.201218][ T655] *** DEADLOCK *** [ 43.201218][ T655] [ 43.201430][ T655] May be due to missing lock nesting notation [ 43.201430][ T655] [ 43.201644][ T655] 2 locks held by ip/655: [ 43.201760][ T655] #0: ffffffffa6fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.202030][ T655] #1: ffffffffa6fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.202326][ T655] [ 43.202326][ T655] stack backtrace: [ 43.202506][ T655] CPU: 3 UID: 0 PID: 655 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.202726][ T655] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.202913][ T655] Call Trace: [ 43.203030][ T655] [ 43.203107][ T655] dump_stack_lvl+0x82/0xd0 [ 43.203259][ T655] print_deadlock_bug+0x40a/0x650 [ 43.203410][ T655] validate_chain+0x5bf/0xae0 [ 43.203558][ T655] ? __pfx_validate_chain+0x10/0x10 [ 43.203712][ T655] ? hlock_class+0x4e/0x130 [ 43.203857][ T655] ? mark_lock+0x38/0x3e0 [ 43.203972][ T655] __lock_acquire+0xb9a/0x1680 [ 43.204122][ T655] lock_acquire.part.0+0xeb/0x330 [ 43.204270][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 43.204452][ T655] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.204639][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.204785][ T655] ? trace_lock_acquire+0x14c/0x1f0 [ 43.204936][ T655] ? lock_acquire+0x32/0xc0 [ 43.205082][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 43.205271][ T655] down_read+0x9f/0x340 [ 43.205383][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 43.205563][ T655] ? __pfx_down_read+0x10/0x10 [ 43.205712][ T655] ? __lock_release+0x103/0x460 [ 43.205859][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 43.206005][ T655] ? __pfx___lock_release+0x10/0x10 [ 43.206160][ T655] blocking_notifier_call_chain+0x50/0x90 [ 43.206328][ T655] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.206480][ T655] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.206667][ T655] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.206813][ T655] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.206999][ T655] ? rtnl_is_locked+0x15/0x20 [ 43.207151][ T655] netdev_upper_dev_unlink+0x71/0xa0 [ 43.207302][ T655] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.207496][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 43.207656][ T655] ? mutex_is_locked+0x1c/0x60 [ 43.207810][ T655] ? rtnl_is_locked+0x15/0x20 [ 43.207955][ T655] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.208142][ T655] vrf_device_event+0x78/0xe0 [vrf] [ 43.208294][ T655] notifier_call_chain+0xcd/0x150 [ 43.208445][ T655] blocking_notifier_call_chain+0x66/0x90 [ 43.208596][ T655] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.208783][ T655] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.208966][ T655] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 43.209119][ T655] ? __pfx___lock_release+0x10/0x10 [ 43.209268][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.209417][ T655] ? rtnl_is_locked+0x15/0x20 [ 43.209565][ T655] ? unregister_netdevice_queue+0x70/0x410 [ 43.209751][ T655] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 43.209935][ T655] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 43.210085][ T655] rtnl_dellink+0x348/0xa40 [ 43.210233][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.210399][ T655] ? find_held_lock+0x2c/0x110 [ 43.210547][ T655] ? __lock_release+0x103/0x460 [ 43.210696][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.210842][ T655] ? __pfx___lock_release+0x10/0x10 [ 43.210989][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.211138][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.211283][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.211430][ T655] rtnetlink_rcv_msg+0x712/0xc10 [ 43.211576][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.211728][ T655] ? hlock_class+0x4e/0x130 [ 43.211872][ T655] ? mark_lock+0x38/0x3e0 [ 43.211984][ T655] ? __lock_acquire+0xb9a/0x1680 [ 43.212130][ T655] netlink_rcv_skb+0x130/0x360 [ 43.212277][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.212424][ T655] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.212575][ T655] ? netlink_deliver_tap+0x13e/0x340 [ 43.212727][ T655] ? netlink_deliver_tap+0xc3/0x340 [ 43.212875][ T655] netlink_unicast+0x44b/0x710 [ 43.213022][ T655] ? __pfx_netlink_unicast+0x10/0x10 [ 43.213166][ T655] ? find_held_lock+0x2c/0x110 [ 43.213313][ T655] netlink_sendmsg+0x723/0xbe0 [ 43.213461][ T655] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.213609][ T655] ____sys_sendmsg+0x7ac/0xa10 [ 43.213756][ T655] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.213906][ T655] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.214095][ T655] ___sys_sendmsg+0xee/0x170 [ 43.214242][ T655] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.214395][ T655] ? kasan_save_stack+0x34/0x50 [ 43.214543][ T655] ? kasan_save_stack+0x24/0x50 [ 43.214689][ T655] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.214837][ T655] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.215027][ T655] ? __x64_sys_close+0x7c/0xd0 [ 43.215173][ T655] ? do_syscall_64+0xc1/0x1d0 [ 43.215324][ T655] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.215509][ T655] ? __lock_acquire+0xb9a/0x1680 [ 43.215660][ T655] ? find_held_lock+0x2c/0x110 [ 43.215809][ T655] ? __lock_release+0x103/0x460 [ 43.215955][ T655] ? __virt_addr_valid+0x22b/0x430 [ 43.216109][ T655] ? __pfx___lock_release+0x10/0x10 [ 43.216270][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.216419][ T655] __sys_sendmsg+0x109/0x1a0 [ 43.216564][ T655] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.216709][ T655] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.216896][ T655] do_syscall_64+0xc1/0x1d0 [ 43.217043][ T655] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.217229][ T655] RIP: 0033:0x7f109ef819a7 [ 43.217381][ T655] 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 [ 43.217905][ T655] RSP: 002b:00007ffee19fdf58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.218130][ T655] RAX: ffffffffffffffda RBX: 00007ffee19fe680 RCX: 00007f109ef819a7 [ 43.218357][ T655] RDX: 0000000000000000 RSI: 00007ffee19fdfc0 RDI: 0000000000000005 [ 43.218578][ T655] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.218799][ T655] R10: 00007f109ee3fef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.219021][ T655] R13: 0000000067792ee5 R14: 0000000000498600 R15: 0000000000000000 [ 43.219254][ T655]