[ 17.974163][ T356] 8021q: 802.1Q VLAN Support v1.8 [ 18.434159][ T362] gre: GRE over IPv4 demultiplexor driver [ 18.482556][ T362] ip6_gre: GRE over IPv6 tunneling driver [ 18.668521][ T366] ip (366) used greatest stack depth: 23320 bytes left [ 28.607851][ T446] GACT probability NOT on [ 45.591623][ T659] [ 45.591780][ T659] ============================================ [ 45.591970][ T659] WARNING: possible recursive locking detected [ 45.592158][ T659] 6.13.0-rc5-virtme #1 Not tainted [ 45.592330][ T659] -------------------------------------------- [ 45.592552][ T659] ip/659 is trying to acquire lock: [ 45.592729][ T659] ffffffffa43d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.593079][ T659] [ 45.593079][ T659] but task is already holding lock: [ 45.593326][ T659] ffffffffa43d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.593678][ T659] [ 45.593678][ T659] other info that might help us debug this: [ 45.593930][ T659] Possible unsafe locking scenario: [ 45.593930][ T659] [ 45.594166][ T659] CPU0 [ 45.594296][ T659] ---- [ 45.594417][ T659] lock((netdev_chain).rwsem); [ 45.594594][ T659] lock((netdev_chain).rwsem); [ 45.594760][ T659] [ 45.594760][ T659] *** DEADLOCK *** [ 45.594760][ T659] [ 45.594996][ T659] May be due to missing lock nesting notation [ 45.594996][ T659] [ 45.595229][ T659] 2 locks held by ip/659: [ 45.595353][ T659] #0: ffffffffa43e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 45.595667][ T659] #1: ffffffffa43d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.595998][ T659] [ 45.595998][ T659] stack backtrace: [ 45.596212][ T659] CPU: 0 UID: 0 PID: 659 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 45.596457][ T659] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.596676][ T659] Call Trace: [ 45.596798][ T659] [ 45.596889][ T659] dump_stack_lvl+0x82/0xd0 [ 45.597061][ T659] print_deadlock_bug+0x40a/0x650 [ 45.597224][ T659] validate_chain+0x5bf/0xae0 [ 45.597388][ T659] ? __pfx_validate_chain+0x10/0x10 [ 45.597558][ T659] ? hlock_class+0x4e/0x130 [ 45.597718][ T659] ? mark_lock+0x38/0x3e0 [ 45.597846][ T659] __lock_acquire+0xb9a/0x1680 [ 45.598010][ T659] lock_acquire.part.0+0xeb/0x330 [ 45.598169][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.598366][ T659] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 45.598582][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.598758][ T659] ? trace_lock_acquire+0x14c/0x1f0 [ 45.598919][ T659] ? lock_acquire+0x32/0xc0 [ 45.599086][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.599290][ T659] down_read+0x9f/0x340 [ 45.599413][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.599615][ T659] ? __pfx_down_read+0x10/0x10 [ 45.599783][ T659] ? __lock_release+0x103/0x460 [ 45.599947][ T659] ? netconsole_netdev_event+0x2c1/0x620 [ 45.600124][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.600295][ T659] blocking_notifier_call_chain+0x50/0x90 [ 45.600458][ T659] __netdev_upper_dev_unlink+0xd9/0x220 [ 45.600638][ T659] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 45.600838][ T659] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 45.601001][ T659] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 45.601224][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.601399][ T659] netdev_upper_dev_unlink+0x71/0xa0 [ 45.601566][ T659] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 45.601765][ T659] ? netconsole_netdev_event+0x2c1/0x620 [ 45.601946][ T659] ? mutex_is_locked+0x1c/0x60 [ 45.602108][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.602289][ T659] ? netdev_master_upper_dev_get+0x13/0x120 [ 45.602486][ T659] vrf_device_event+0x78/0xe0 [vrf] [ 45.602666][ T659] notifier_call_chain+0xcd/0x150 [ 45.602839][ T659] blocking_notifier_call_chain+0x66/0x90 [ 45.603000][ T659] unregister_netdevice_many_notify+0xa7b/0x1580 [ 45.603219][ T659] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.603421][ T659] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 45.603584][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.603749][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.603933][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.604094][ T659] ? unregister_netdevice_queue+0x70/0x410 [ 45.604307][ T659] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 45.604506][ T659] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 45.604691][ T659] rtnl_dellink+0x348/0xa40 [ 45.604853][ T659] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.605036][ T659] ? find_held_lock+0x2c/0x110 [ 45.605217][ T659] ? __lock_release+0x103/0x460 [ 45.605380][ T659] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.605549][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.605713][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.605861][ T659] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.606007][ T659] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.606161][ T659] rtnetlink_rcv_msg+0x712/0xc10 [ 45.606317][ T659] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.606464][ T659] ? hlock_class+0x4e/0x130 [ 45.606611][ T659] ? mark_lock+0x38/0x3e0 [ 45.606723][ T659] ? __lock_acquire+0xb9a/0x1680 [ 45.606870][ T659] netlink_rcv_skb+0x130/0x360 [ 45.607026][ T659] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.607187][ T659] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 45.607355][ T659] ? netlink_deliver_tap+0x13e/0x340 [ 45.607518][ T659] ? netlink_deliver_tap+0xc3/0x340 [ 45.607695][ T659] netlink_unicast+0x44b/0x710 [ 45.607857][ T659] ? __pfx_netlink_unicast+0x10/0x10 [ 45.608035][ T659] ? find_held_lock+0x2c/0x110 [ 45.608197][ T659] netlink_sendmsg+0x723/0xbe0 [ 45.608358][ T659] ? __pfx_netlink_sendmsg+0x10/0x10 [ 45.608528][ T659] ____sys_sendmsg+0x7ac/0xa10 [ 45.608698][ T659] ? __pfx_____sys_sendmsg+0x10/0x10 [ 45.608857][ T659] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 45.609076][ T659] ___sys_sendmsg+0xee/0x170 [ 45.609236][ T659] ? __pfx____sys_sendmsg+0x10/0x10 [ 45.609397][ T659] ? kasan_save_stack+0x34/0x50 [ 45.609558][ T659] ? kasan_save_stack+0x24/0x50 [ 45.609725][ T659] ? __kasan_record_aux_stack+0x8e/0xa0 [ 45.609904][ T659] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 45.610102][ T659] ? __x64_sys_close+0x7c/0xd0 [ 45.610263][ T659] ? do_syscall_64+0xc1/0x1d0 [ 45.610428][ T659] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.610630][ T659] ? __lock_acquire+0xb9a/0x1680 [ 45.610813][ T659] ? find_held_lock+0x2c/0x110 [ 45.610975][ T659] ? __lock_release+0x103/0x460 [ 45.611157][ T659] ? __virt_addr_valid+0x22b/0x430 [ 45.611306][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.611453][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.611622][ T659] __sys_sendmsg+0x109/0x1a0 [ 45.611772][ T659] ? __pfx___sys_sendmsg+0x10/0x10 [ 45.611918][ T659] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 45.612121][ T659] do_syscall_64+0xc1/0x1d0 [ 45.612284][ T659] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.612500][ T659] RIP: 0033:0x7f83075ff9a7 [ 45.612673][ T659] 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 [ 45.613229][ T659] RSP: 002b:00007ffd57779388 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.613615][ T659] RAX: ffffffffffffffda RBX: 00007ffd57779ab0 RCX: 00007f83075ff9a7 [ 45.613841][ T659] RDX: 0000000000000000 RSI: 00007ffd577793f0 RDI: 0000000000000005 [ 45.614064][ T659] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.614296][ T659] R10: 00007f83074bdef8 R11: 0000000000000246 R12: 0000000000000002 [ 45.614528][ T659] R13: 00000000677953e1 R14: 0000000000498600 R15: 0000000000000000 [ 45.614750][ T659]