[ 10.792369][ T251] ip (251) used greatest stack depth: 23616 bytes left [ 14.393446][ T309] 8021q: 802.1Q VLAN Support v1.8 [ 15.106912][ T321] gre: GRE over IPv4 demultiplexor driver [ 15.119731][ T321] ip_gre: GRE over IPv4 tunneling driver [ 15.340001][ T325] ip (325) used greatest stack depth: 23408 bytes left [ 20.394806][ T387] GACT probability NOT on [ 85.332443][ T680] [ 85.332694][ T680] ============================================ [ 85.332897][ T680] WARNING: possible recursive locking detected [ 85.333084][ T680] 6.13.0-rc5-virtme #1 Not tainted [ 85.333231][ T680] -------------------------------------------- [ 85.333430][ T680] ip/680 is trying to acquire lock: [ 85.333589][ T680] ffffffffa53d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 85.333923][ T680] [ 85.333923][ T680] but task is already holding lock: [ 85.334147][ T680] ffffffffa53d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 85.334456][ T680] [ 85.334456][ T680] other info that might help us debug this: [ 85.334693][ T680] Possible unsafe locking scenario: [ 85.334693][ T680] [ 85.334909][ T680] CPU0 [ 85.335022][ T680] ---- [ 85.335134][ T680] lock((netdev_chain).rwsem); [ 85.335282][ T680] lock((netdev_chain).rwsem); [ 85.335436][ T680] [ 85.335436][ T680] *** DEADLOCK *** [ 85.335436][ T680] [ 85.335752][ T680] May be due to missing lock nesting notation [ 85.335752][ T680] [ 85.336105][ T680] 2 locks held by ip/680: [ 85.336277][ T680] #0: ffffffffa53e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 85.336699][ T680] #1: ffffffffa53d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 85.337156][ T680] [ 85.337156][ T680] stack backtrace: [ 85.337427][ T680] CPU: 3 UID: 0 PID: 680 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 85.337768][ T680] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 85.338042][ T680] Call Trace: [ 85.338217][ T680] [ 85.338338][ T680] dump_stack_lvl+0x82/0xd0 [ 85.338598][ T680] print_deadlock_bug+0x40a/0x650 [ 85.338829][ T680] validate_chain+0x5bf/0xae0 [ 85.339055][ T680] ? __pfx_validate_chain+0x10/0x10 [ 85.339278][ T680] ? hlock_class+0x4e/0x130 [ 85.339509][ T680] ? mark_lock+0x38/0x3e0 [ 85.339679][ T680] __lock_acquire+0xb9a/0x1680 [ 85.339911][ T680] lock_acquire.part.0+0xeb/0x330 [ 85.340136][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 85.340426][ T680] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 85.340727][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 85.340959][ T680] ? trace_lock_acquire+0x14c/0x1f0 [ 85.341185][ T680] ? lock_acquire+0x32/0xc0 [ 85.341408][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 85.341680][ T680] down_read+0x9f/0x340 [ 85.341864][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 85.342159][ T680] ? __pfx_down_read+0x10/0x10 [ 85.342397][ T680] ? __lock_release+0x103/0x460 [ 85.342632][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 85.342877][ T680] ? __pfx___lock_release+0x10/0x10 [ 85.343116][ T680] blocking_notifier_call_chain+0x50/0x90 [ 85.343349][ T680] __netdev_upper_dev_unlink+0xd9/0x220 [ 85.343593][ T680] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 85.343890][ T680] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 85.344133][ T680] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 85.344436][ T680] ? rtnl_is_locked+0x15/0x20 [ 85.344665][ T680] netdev_upper_dev_unlink+0x71/0xa0 [ 85.344894][ T680] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 85.345167][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 85.345397][ T680] ? mutex_is_locked+0x1c/0x60 [ 85.345625][ T680] ? rtnl_is_locked+0x15/0x20 [ 85.345856][ T680] ? netdev_master_upper_dev_get+0x13/0x120 [ 85.346141][ T680] vrf_device_event+0x78/0xe0 [vrf] [ 85.346368][ T680] notifier_call_chain+0xcd/0x150 [ 85.346598][ T680] blocking_notifier_call_chain+0x66/0x90 [ 85.346830][ T680] unregister_netdevice_many_notify+0xa7b/0x1580 [ 85.347108][ T680] ? hlock_class+0x4e/0x130 [ 85.347334][ T680] ? mark_lock+0x38/0x3e0 [ 85.347507][ T680] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 85.347797][ T680] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 85.348073][ T680] ? kfree+0xf3/0x330 [ 85.348242][ T680] ? vlan_vid_del+0x310/0x5e0 [ 85.348472][ T680] ? vlan_vid_del+0x310/0x5e0 [ 85.348710][ T680] rtnl_dellink+0x348/0xa40 [ 85.348943][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 85.349194][ T680] ? find_held_lock+0x2c/0x110 [ 85.349418][ T680] ? __lock_release+0x103/0x460 [ 85.349655][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 85.349892][ T680] ? __pfx___lock_release+0x10/0x10 [ 85.350129][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 85.350369][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 85.350604][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 85.350841][ T680] rtnetlink_rcv_msg+0x712/0xc10 [ 85.351059][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 85.351308][ T680] ? hlock_class+0x4e/0x130 [ 85.351549][ T680] ? mark_lock+0x38/0x3e0 [ 85.351732][ T680] ? __lock_acquire+0xb9a/0x1680 [ 85.351972][ T680] netlink_rcv_skb+0x130/0x360 [ 85.352213][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 85.352453][ T680] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 85.352695][ T680] ? netlink_deliver_tap+0x13e/0x340 [ 85.352946][ T680] ? netlink_deliver_tap+0xc3/0x340 [ 85.353190][ T680] netlink_unicast+0x44b/0x710 [ 85.353431][ T680] ? __pfx_netlink_unicast+0x10/0x10 [ 85.353669][ T680] ? find_held_lock+0x2c/0x110 [ 85.353916][ T680] netlink_sendmsg+0x723/0xbe0 [ 85.354157][ T680] ? __pfx_netlink_sendmsg+0x10/0x10 [ 85.354402][ T680] ____sys_sendmsg+0x7ac/0xa10 [ 85.354654][ T680] ? __pfx_____sys_sendmsg+0x10/0x10 [ 85.354871][ T680] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 85.355152][ T680] ___sys_sendmsg+0xee/0x170 [ 85.355339][ T680] ? __pfx____sys_sendmsg+0x10/0x10 [ 85.355491][ T680] ? kasan_save_stack+0x34/0x50 [ 85.355648][ T680] ? kasan_save_stack+0x24/0x50 [ 85.355816][ T680] ? __kasan_record_aux_stack+0x8e/0xa0 [ 85.355972][ T680] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 85.356161][ T680] ? __x64_sys_close+0x7c/0xd0 [ 85.356317][ T680] ? do_syscall_64+0xc1/0x1d0 [ 85.356469][ T680] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.356665][ T680] ? __lock_acquire+0xb9a/0x1680 [ 85.356821][ T680] ? find_held_lock+0x2c/0x110 [ 85.356975][ T680] ? __lock_release+0x103/0x460 [ 85.357124][ T680] ? __virt_addr_valid+0x22b/0x430 [ 85.357284][ T680] ? __pfx___lock_release+0x10/0x10 [ 85.357433][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 85.357587][ T680] __sys_sendmsg+0x109/0x1a0 [ 85.357747][ T680] ? __pfx___sys_sendmsg+0x10/0x10 [ 85.357899][ T680] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 85.358094][ T680] do_syscall_64+0xc1/0x1d0 [ 85.358247][ T680] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.358436][ T680] RIP: 0033:0x7f943ac179a7 [ 85.358613][ T680] 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 [ 85.359148][ T680] RSP: 002b:00007fff8452ecf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.359381][ T680] RAX: ffffffffffffffda RBX: 00007fff8452f420 RCX: 00007f943ac179a7 [ 85.359611][ T680] RDX: 0000000000000000 RSI: 00007fff8452ed60 RDI: 0000000000000005 [ 85.359848][ T680] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 85.360076][ T680] R10: 00007f943aad5ef8 R11: 0000000000000246 R12: 0000000000000002 [ 85.360306][ T680] R13: 0000000067795697 R14: 0000000000498600 R15: 0000000000000000 [ 85.360536][ T680] [ 85.383358][ T680] ip (680) used greatest stack depth: 23360 bytes left