[ 1234.316871][ T4035] GACT probability NOT on [ 1253.290078][ T4450] [ 1253.290240][ T4450] ============================================ [ 1253.290446][ T4450] WARNING: possible recursive locking detected [ 1253.290636][ T4450] 6.13.0-rc5-virtme #1 Not tainted [ 1253.290793][ T4450] -------------------------------------------- [ 1253.290990][ T4450] ip/4450 is trying to acquire lock: [ 1253.291147][ T4450] ffffffffb7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1253.291449][ T4450] [ 1253.291449][ T4450] but task is already holding lock: [ 1253.291667][ T4450] ffffffffb7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1253.291995][ T4450] [ 1253.291995][ T4450] other info that might help us debug this: [ 1253.292213][ T4450] Possible unsafe locking scenario: [ 1253.292213][ T4450] [ 1253.292443][ T4450] CPU0 [ 1253.292554][ T4450] ---- [ 1253.292678][ T4450] lock((netdev_chain).rwsem); [ 1253.292822][ T4450] lock((netdev_chain).rwsem); [ 1253.292984][ T4450] [ 1253.292984][ T4450] *** DEADLOCK *** [ 1253.292984][ T4450] [ 1253.293196][ T4450] May be due to missing lock nesting notation [ 1253.293196][ T4450] [ 1253.293406][ T4450] 2 locks held by ip/4450: [ 1253.293587][ T4450] #0: ffffffffb7de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1253.293864][ T4450] #1: ffffffffb7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1253.294160][ T4450] [ 1253.294160][ T4450] stack backtrace: [ 1253.294339][ T4450] CPU: 2 UID: 0 PID: 4450 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1253.294557][ T4450] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1253.294746][ T4450] Call Trace: [ 1253.294859][ T4450] [ 1253.294936][ T4450] dump_stack_lvl+0x82/0xd0 [ 1253.295089][ T4450] print_deadlock_bug+0x40a/0x650 [ 1253.295243][ T4450] validate_chain+0x5bf/0xae0 [ 1253.295389][ T4450] ? __pfx_validate_chain+0x10/0x10 [ 1253.295537][ T4450] ? hlock_class+0x4e/0x130 [ 1253.295685][ T4450] ? mark_lock+0x38/0x3e0 [ 1253.295798][ T4450] __lock_acquire+0xb9a/0x1680 [ 1253.295956][ T4450] lock_acquire.part.0+0xeb/0x330 [ 1253.296101][ T4450] ? blocking_notifier_call_chain+0x50/0x90 [ 1253.296283][ T4450] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1253.296469][ T4450] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1253.296616][ T4450] ? trace_lock_acquire+0x14c/0x1f0 [ 1253.296762][ T4450] ? lock_acquire+0x32/0xc0 [ 1253.296909][ T4450] ? blocking_notifier_call_chain+0x50/0x90 [ 1253.297099][ T4450] down_read+0x9f/0x340 [ 1253.297210][ T4450] ? blocking_notifier_call_chain+0x50/0x90 [ 1253.297390][ T4450] ? __pfx_down_read+0x10/0x10 [ 1253.297535][ T4450] ? __lock_release+0x103/0x460 [ 1253.297683][ T4450] ? netconsole_netdev_event+0x2c1/0x620 [ 1253.297830][ T4450] ? __pfx___lock_release+0x10/0x10 [ 1253.297976][ T4450] blocking_notifier_call_chain+0x50/0x90 [ 1253.298129][ T4450] __netdev_upper_dev_unlink+0xd9/0x220 [ 1253.298278][ T4450] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1253.298460][ T4450] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1253.298605][ T4450] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1253.298786][ T4450] ? rtnl_is_locked+0x15/0x20 [ 1253.298939][ T4450] netdev_upper_dev_unlink+0x71/0xa0 [ 1253.299091][ T4450] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1253.299271][ T4450] ? netconsole_netdev_event+0x2c1/0x620 [ 1253.299420][ T4450] ? mutex_is_locked+0x1c/0x60 [ 1253.299568][ T4450] ? rtnl_is_locked+0x15/0x20 [ 1253.299711][ T4450] ? netdev_master_upper_dev_get+0x13/0x120 [ 1253.299893][ T4450] vrf_device_event+0x78/0xe0 [vrf] [ 1253.300056][ T4450] notifier_call_chain+0xcd/0x150 [ 1253.300217][ T4450] blocking_notifier_call_chain+0x66/0x90 [ 1253.300364][ T4450] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1253.300545][ T4450] ? __lock_release+0x103/0x460 [ 1253.300694][ T4450] ? __pfx___lock_release+0x10/0x10 [ 1253.300846][ T4450] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1253.301029][ T4450] ? hlock_class+0x4e/0x130 [ 1253.301179][ T4450] ? mark_held_locks+0x9e/0xe0 [ 1253.301331][ T4450] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 1253.301488][ T4450] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1253.301672][ T4450] rtnl_dellink+0x348/0xa40 [ 1253.301823][ T4450] ? __pfx_rtnl_dellink+0x10/0x10 [ 1253.301984][ T4450] ? find_held_lock+0x2c/0x110 [ 1253.302136][ T4450] ? __lock_release+0x103/0x460 [ 1253.302281][ T4450] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1253.302433][ T4450] ? __pfx___lock_release+0x10/0x10 [ 1253.302578][ T4450] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1253.302727][ T4450] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1253.302877][ T4450] ? __pfx_rtnl_dellink+0x10/0x10 [ 1253.303025][ T4450] rtnetlink_rcv_msg+0x712/0xc10 [ 1253.303171][ T4450] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1253.303317][ T4450] ? hlock_class+0x4e/0x130 [ 1253.303469][ T4450] ? mark_lock+0x38/0x3e0 [ 1253.303584][ T4450] ? __lock_acquire+0xb9a/0x1680 [ 1253.303737][ T4450] netlink_rcv_skb+0x130/0x360 [ 1253.303888][ T4450] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1253.304033][ T4450] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1253.304183][ T4450] ? netlink_deliver_tap+0x13e/0x340 [ 1253.304334][ T4450] ? netlink_deliver_tap+0xc3/0x340 [ 1253.304488][ T4450] netlink_unicast+0x44b/0x710 [ 1253.304639][ T4450] ? __pfx_netlink_unicast+0x10/0x10 [ 1253.304788][ T4450] ? find_held_lock+0x2c/0x110 [ 1253.304940][ T4450] netlink_sendmsg+0x723/0xbe0 [ 1253.305091][ T4450] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1253.305240][ T4450] ____sys_sendmsg+0x7ac/0xa10 [ 1253.305390][ T4450] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1253.305541][ T4450] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1253.305728][ T4450] ___sys_sendmsg+0xee/0x170 [ 1253.305880][ T4450] ? __pfx____sys_sendmsg+0x10/0x10 [ 1253.306029][ T4450] ? kasan_save_stack+0x34/0x50 [ 1253.306175][ T4450] ? kasan_save_stack+0x24/0x50 [ 1253.306322][ T4450] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1253.306470][ T4450] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1253.306664][ T4450] ? __x64_sys_close+0x7c/0xd0 [ 1253.306816][ T4450] ? do_syscall_64+0xc1/0x1d0 [ 1253.306967][ T4450] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1253.307152][ T4450] ? __lock_acquire+0xb9a/0x1680 [ 1253.307303][ T4450] ? find_held_lock+0x2c/0x110 [ 1253.307454][ T4450] ? __lock_release+0x103/0x460 [ 1253.307601][ T4450] ? __virt_addr_valid+0x22b/0x430 [ 1253.307750][ T4450] ? __pfx___lock_release+0x10/0x10 [ 1253.307908][ T4450] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1253.308057][ T4450] __sys_sendmsg+0x109/0x1a0 [ 1253.308208][ T4450] ? __pfx___sys_sendmsg+0x10/0x10 [ 1253.308356][ T4450] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1253.308548][ T4450] do_syscall_64+0xc1/0x1d0 [ 1253.308695][ T4450] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1253.308885][ T4450] RIP: 0033:0x7f0ee96219a7 [ 1253.309050][ T4450] 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 [ 1253.309564][ T4450] RSP: 002b:00007ffda29fcc38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1253.309791][ T4450] RAX: ffffffffffffffda RBX: 00007ffda29fd360 RCX: 00007f0ee96219a7 [ 1253.310023][ T4450] RDX: 0000000000000000 RSI: 00007ffda29fcca0 RDI: 0000000000000005 [ 1253.310249][ T4450] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1253.310469][ T4450] R10: 00007f0ee94dfef8 R11: 0000000000000246 R12: 0000000000000002 [ 1253.310689][ T4450] R13: 0000000067795357 R14: 0000000000498600 R15: 0000000000000000 [ 1253.310927][ T4450]