[ 18.524908][ T307] GACT probability NOT on [ 35.914137][ T711] 8021q: 802.1Q VLAN Support v1.8 [ 37.403955][ T734] [ 37.404107][ T734] ============================================ [ 37.404312][ T734] WARNING: possible recursive locking detected [ 37.404588][ T734] 6.13.0-rc5-virtme #1 Not tainted [ 37.404738][ T734] -------------------------------------------- [ 37.404915][ T734] ip/734 is trying to acquire lock: [ 37.405064][ T734] ffffffff9b3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 37.405382][ T734] [ 37.405382][ T734] but task is already holding lock: [ 37.405595][ T734] ffffffff9b3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 37.405895][ T734] [ 37.405895][ T734] other info that might help us debug this: [ 37.406110][ T734] Possible unsafe locking scenario: [ 37.406110][ T734] [ 37.406326][ T734] CPU0 [ 37.406441][ T734] ---- [ 37.406551][ T734] lock((netdev_chain).rwsem); [ 37.406696][ T734] lock((netdev_chain).rwsem); [ 37.406849][ T734] [ 37.406849][ T734] *** DEADLOCK *** [ 37.406849][ T734] [ 37.407068][ T734] May be due to missing lock nesting notation [ 37.407068][ T734] [ 37.407286][ T734] 2 locks held by ip/734: [ 37.407397][ T734] #0: ffffffff9b3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 37.407667][ T734] #1: ffffffff9b3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 37.407961][ T734] [ 37.407961][ T734] stack backtrace: [ 37.408139][ T734] CPU: 3 UID: 0 PID: 734 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 37.408366][ T734] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 37.408555][ T734] Call Trace: [ 37.408669][ T734] [ 37.408756][ T734] dump_stack_lvl+0x82/0xd0 [ 37.408910][ T734] print_deadlock_bug+0x40a/0x650 [ 37.409059][ T734] validate_chain+0x5bf/0xae0 [ 37.409209][ T734] ? __pfx_validate_chain+0x10/0x10 [ 37.409360][ T734] ? hlock_class+0x4e/0x130 [ 37.409513][ T734] ? mark_lock+0x38/0x3e0 [ 37.409624][ T734] __lock_acquire+0xb9a/0x1680 [ 37.409778][ T734] lock_acquire.part.0+0xeb/0x330 [ 37.409921][ T734] ? blocking_notifier_call_chain+0x50/0x90 [ 37.410105][ T734] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 37.410291][ T734] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 37.410439][ T734] ? trace_lock_acquire+0x14c/0x1f0 [ 37.410593][ T734] ? lock_acquire+0x32/0xc0 [ 37.410736][ T734] ? blocking_notifier_call_chain+0x50/0x90 [ 37.410916][ T734] down_read+0x9f/0x340 [ 37.411028][ T734] ? blocking_notifier_call_chain+0x50/0x90 [ 37.411210][ T734] ? __pfx_down_read+0x10/0x10 [ 37.411353][ T734] ? __lock_release+0x103/0x460 [ 37.411496][ T734] ? netconsole_netdev_event+0x2c1/0x620 [ 37.411647][ T734] ? __pfx___lock_release+0x10/0x10 [ 37.411794][ T734] blocking_notifier_call_chain+0x50/0x90 [ 37.411940][ T734] __netdev_upper_dev_unlink+0xd9/0x220 [ 37.412086][ T734] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 37.412267][ T734] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 37.412417][ T734] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 37.412603][ T734] ? rtnl_is_locked+0x15/0x20 [ 37.412752][ T734] netdev_upper_dev_unlink+0x71/0xa0 [ 37.412897][ T734] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 37.413087][ T734] ? netconsole_netdev_event+0x2c1/0x620 [ 37.413233][ T734] ? mutex_is_locked+0x1c/0x60 [ 37.413380][ T734] ? rtnl_is_locked+0x15/0x20 [ 37.413525][ T734] ? netdev_master_upper_dev_get+0x13/0x120 [ 37.413714][ T734] vrf_device_event+0x78/0xe0 [vrf] [ 37.413867][ T734] notifier_call_chain+0xcd/0x150 [ 37.414014][ T734] blocking_notifier_call_chain+0x66/0x90 [ 37.414162][ T734] unregister_netdevice_many_notify+0xa7b/0x1580 [ 37.414343][ T734] ? __lock_release+0x103/0x460 [ 37.414487][ T734] ? __pfx___lock_release+0x10/0x10 [ 37.414634][ T734] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 37.414827][ T734] ? hlock_class+0x4e/0x130 [ 37.414972][ T734] ? mark_held_locks+0x9e/0xe0 [ 37.415116][ T734] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 37.415263][ T734] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 37.415445][ T734] rtnl_dellink+0x348/0xa40 [ 37.415599][ T734] ? __pfx_rtnl_dellink+0x10/0x10 [ 37.415758][ T734] ? find_held_lock+0x2c/0x110 [ 37.415910][ T734] ? __lock_release+0x103/0x460 [ 37.416056][ T734] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 37.416203][ T734] ? __pfx___lock_release+0x10/0x10 [ 37.416350][ T734] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 37.416499][ T734] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 37.416645][ T734] ? __pfx_rtnl_dellink+0x10/0x10 [ 37.416794][ T734] rtnetlink_rcv_msg+0x712/0xc10 [ 37.416945][ T734] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 37.417093][ T734] ? hlock_class+0x4e/0x130 [ 37.417239][ T734] ? mark_lock+0x38/0x3e0 [ 37.417350][ T734] ? __lock_acquire+0xb9a/0x1680 [ 37.417495][ T734] netlink_rcv_skb+0x130/0x360 [ 37.417641][ T734] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 37.417789][ T734] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 37.417937][ T734] ? netlink_deliver_tap+0x13e/0x340 [ 37.418091][ T734] ? netlink_deliver_tap+0xc3/0x340 [ 37.418238][ T734] netlink_unicast+0x44b/0x710 [ 37.418384][ T734] ? __pfx_netlink_unicast+0x10/0x10 [ 37.418529][ T734] ? find_held_lock+0x2c/0x110 [ 37.418679][ T734] netlink_sendmsg+0x723/0xbe0 [ 37.418826][ T734] ? __pfx_netlink_sendmsg+0x10/0x10 [ 37.418976][ T734] ____sys_sendmsg+0x7ac/0xa10 [ 37.419129][ T734] ? __pfx_____sys_sendmsg+0x10/0x10 [ 37.419276][ T734] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 37.419462][ T734] ___sys_sendmsg+0xee/0x170 [ 37.419608][ T734] ? __pfx____sys_sendmsg+0x10/0x10 [ 37.419755][ T734] ? kasan_save_stack+0x34/0x50 [ 37.419901][ T734] ? kasan_save_stack+0x24/0x50 [ 37.420048][ T734] ? __kasan_record_aux_stack+0x8e/0xa0 [ 37.420202][ T734] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 37.420385][ T734] ? __x64_sys_close+0x7c/0xd0 [ 37.420532][ T734] ? do_syscall_64+0xc1/0x1d0 [ 37.420680][ T734] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 37.420864][ T734] ? __lock_acquire+0xb9a/0x1680 [ 37.421013][ T734] ? find_held_lock+0x2c/0x110 [ 37.421159][ T734] ? __lock_release+0x103/0x460 [ 37.421322][ T734] ? __virt_addr_valid+0x22b/0x430 [ 37.421472][ T734] ? __pfx___lock_release+0x10/0x10 [ 37.421618][ T734] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 37.421764][ T734] __sys_sendmsg+0x109/0x1a0 [ 37.421911][ T734] ? __pfx___sys_sendmsg+0x10/0x10 [ 37.422055][ T734] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 37.422242][ T734] do_syscall_64+0xc1/0x1d0 [ 37.422395][ T734] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 37.422576][ T734] RIP: 0033:0x7f16aaa139a7 [ 37.422732][ T734] 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 [ 37.423260][ T734] RSP: 002b:00007ffc17a300c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 37.423488][ T734] RAX: ffffffffffffffda RBX: 00007ffc17a307f0 RCX: 00007f16aaa139a7 [ 37.423708][ T734] RDX: 0000000000000000 RSI: 00007ffc17a30130 RDI: 0000000000000005 [ 37.423929][ T734] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 37.424152][ T734] R10: 00007f16aa8d1ef8 R11: 0000000000000246 R12: 0000000000000002 [ 37.424378][ T734] R13: 0000000067792e12 R14: 0000000000498600 R15: 0000000000000000 [ 37.424600][ T734] [ 37.445814][ T734] ip (734) used greatest stack depth: 23128 bytes left