[ 50.116222][ T659] 8021q: 802.1Q VLAN Support v1.8 [ 50.462940][ T664] gre: GRE over IPv4 demultiplexor driver [ 50.488388][ T664] ip_gre: GRE over IPv4 tunneling driver [ 67.803790][ T763] [ 67.804008][ T763] ============================================ [ 67.804229][ T763] WARNING: possible recursive locking detected [ 67.804449][ T763] 6.13.0-rc5-virtme #1 Not tainted [ 67.804617][ T763] -------------------------------------------- [ 67.804826][ T763] ip/763 is trying to acquire lock: [ 67.804996][ T763] ffffffff8b5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 67.805342][ T763] [ 67.805342][ T763] but task is already holding lock: [ 67.805592][ T763] ffffffff8b5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 67.805938][ T763] [ 67.805938][ T763] other info that might help us debug this: [ 67.806181][ T763] Possible unsafe locking scenario: [ 67.806181][ T763] [ 67.806423][ T763] CPU0 [ 67.806548][ T763] ---- [ 67.806671][ T763] lock((netdev_chain).rwsem); [ 67.806838][ T763] lock((netdev_chain).rwsem); [ 67.807008][ T763] [ 67.807008][ T763] *** DEADLOCK *** [ 67.807008][ T763] [ 67.807255][ T763] May be due to missing lock nesting notation [ 67.807255][ T763] [ 67.807497][ T763] 2 locks held by ip/763: [ 67.807635][ T763] #0: ffffffff8b5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 67.807942][ T763] #1: ffffffff8b5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 67.808279][ T763] [ 67.808279][ T763] stack backtrace: [ 67.808483][ T763] CPU: 3 UID: 0 PID: 763 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 67.808734][ T763] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 67.808947][ T763] Call Trace: [ 67.809077][ T763] [ 67.809165][ T763] dump_stack_lvl+0x82/0xd0 [ 67.809347][ T763] print_deadlock_bug+0x40a/0x650 [ 67.809512][ T763] validate_chain+0x5bf/0xae0 [ 67.809681][ T763] ? __pfx_validate_chain+0x10/0x10 [ 67.809851][ T763] ? hlock_class+0x4e/0x130 [ 67.810020][ T763] ? mark_lock+0x38/0x3e0 [ 67.810147][ T763] __lock_acquire+0xb9a/0x1680 [ 67.810316][ T763] lock_acquire.part.0+0xeb/0x330 [ 67.810477][ T763] ? blocking_notifier_call_chain+0x50/0x90 [ 67.810686][ T763] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 67.810897][ T763] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 67.811064][ T763] ? trace_lock_acquire+0x14c/0x1f0 [ 67.811232][ T763] ? lock_acquire+0x32/0xc0 [ 67.811398][ T763] ? blocking_notifier_call_chain+0x50/0x90 [ 67.811605][ T763] down_read+0x9f/0x340 [ 67.811730][ T763] ? blocking_notifier_call_chain+0x50/0x90 [ 67.811942][ T763] ? __pfx_down_read+0x10/0x10 [ 67.812112][ T763] ? __lock_release+0x103/0x460 [ 67.812277][ T763] ? netconsole_netdev_event+0x2c1/0x620 [ 67.812452][ T763] ? __pfx___lock_release+0x10/0x10 [ 67.812620][ T763] blocking_notifier_call_chain+0x50/0x90 [ 67.812792][ T763] __netdev_upper_dev_unlink+0xd9/0x220 [ 67.812972][ T763] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 67.813188][ T763] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 67.813359][ T763] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 67.813576][ T763] ? rtnl_is_locked+0x15/0x20 [ 67.813750][ T763] netdev_upper_dev_unlink+0x71/0xa0 [ 67.813927][ T763] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 67.814139][ T763] ? netconsole_netdev_event+0x2c1/0x620 [ 67.814312][ T763] ? mutex_is_locked+0x1c/0x60 [ 67.814485][ T763] ? rtnl_is_locked+0x15/0x20 [ 67.814658][ T763] ? netdev_master_upper_dev_get+0x13/0x120 [ 67.814869][ T763] vrf_device_event+0x78/0xe0 [vrf] [ 67.815046][ T763] notifier_call_chain+0xcd/0x150 [ 67.815222][ T763] blocking_notifier_call_chain+0x66/0x90 [ 67.815394][ T763] unregister_netdevice_many_notify+0xa7b/0x1580 [ 67.815614][ T763] ? __lock_release+0x103/0x460 [ 67.815788][ T763] ? __pfx___lock_release+0x10/0x10 [ 67.815959][ T763] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 67.816167][ T763] ? hlock_class+0x4e/0x130 [ 67.816343][ T763] ? mark_held_locks+0x9e/0xe0 [ 67.816516][ T763] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 67.816690][ T763] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 67.816912][ T763] rtnl_dellink+0x348/0xa40 [ 67.817086][ T763] ? __pfx_rtnl_dellink+0x10/0x10 [ 67.817273][ T763] ? find_held_lock+0x2c/0x110 [ 67.817449][ T763] ? __lock_release+0x103/0x460 [ 67.817627][ T763] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 67.817794][ T763] ? __pfx___lock_release+0x10/0x10 [ 67.817959][ T763] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 67.818135][ T763] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 67.818302][ T763] ? __pfx_rtnl_dellink+0x10/0x10 [ 67.818468][ T763] rtnetlink_rcv_msg+0x712/0xc10 [ 67.818635][ T763] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 67.818803][ T763] ? hlock_class+0x4e/0x130 [ 67.818968][ T763] ? mark_lock+0x38/0x3e0 [ 67.819096][ T763] ? __lock_acquire+0xb9a/0x1680 [ 67.819264][ T763] netlink_rcv_skb+0x130/0x360 [ 67.819436][ T763] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 67.819602][ T763] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 67.819772][ T763] ? netlink_deliver_tap+0x13e/0x340 [ 67.819941][ T763] ? netlink_deliver_tap+0xc3/0x340 [ 67.820113][ T763] netlink_unicast+0x44b/0x710 [ 67.820282][ T763] ? __pfx_netlink_unicast+0x10/0x10 [ 67.820451][ T763] ? find_held_lock+0x2c/0x110 [ 67.820620][ T763] netlink_sendmsg+0x723/0xbe0 [ 67.820790][ T763] ? __pfx_netlink_sendmsg+0x10/0x10 [ 67.820958][ T763] ____sys_sendmsg+0x7ac/0xa10 [ 67.821125][ T763] ? __pfx_____sys_sendmsg+0x10/0x10 [ 67.821291][ T763] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 67.821502][ T763] ___sys_sendmsg+0xee/0x170 [ 67.821674][ T763] ? __pfx____sys_sendmsg+0x10/0x10 [ 67.821841][ T763] ? kasan_save_stack+0x34/0x50 [ 67.822011][ T763] ? kasan_save_stack+0x24/0x50 [ 67.822176][ T763] ? __kasan_record_aux_stack+0x8e/0xa0 [ 67.822344][ T763] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 67.822553][ T763] ? __x64_sys_close+0x7c/0xd0 [ 67.822724][ T763] ? do_syscall_64+0xc1/0x1d0 [ 67.822893][ T763] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.823106][ T763] ? __lock_acquire+0xb9a/0x1680 [ 67.823272][ T763] ? find_held_lock+0x2c/0x110 [ 67.823443][ T763] ? __lock_release+0x103/0x460 [ 67.823608][ T763] ? __virt_addr_valid+0x22b/0x430 [ 67.823777][ T763] ? __pfx___lock_release+0x10/0x10 [ 67.823941][ T763] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 67.824110][ T763] __sys_sendmsg+0x109/0x1a0 [ 67.824280][ T763] ? __pfx___sys_sendmsg+0x10/0x10 [ 67.824452][ T763] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 67.824670][ T763] do_syscall_64+0xc1/0x1d0 [ 67.824844][ T763] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.825056][ T763] RIP: 0033:0x7fbea03bf9a7 [ 67.825232][ T763] 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 [ 67.825842][ T763] RSP: 002b:00007ffe70b1eaa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.826101][ T763] RAX: ffffffffffffffda RBX: 00007ffe70b1f1d0 RCX: 00007fbea03bf9a7 [ 67.826356][ T763] RDX: 0000000000000000 RSI: 00007ffe70b1eb10 RDI: 0000000000000005 [ 67.826616][ T763] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 67.826873][ T763] R10: 00007fbea027def8 R11: 0000000000000246 R12: 0000000000000002 [ 67.827123][ T763] R13: 000000006779545f R14: 0000000000498600 R15: 0000000000000000 [ 67.827378][ T763] [ 67.845899][ T763] ip (763) used greatest stack depth: 23824 bytes left