[ 10.527596][ T249] ip (249) used greatest stack depth: 24400 bytes left [ 15.510685][ T330] 8021q: 802.1Q VLAN Support v1.8 [ 15.904893][ T336] gre: GRE over IPv4 demultiplexor driver [ 15.916945][ T336] ip_gre: GRE over IPv4 tunneling driver [ 16.085557][ T340] ip (340) used greatest stack depth: 24136 bytes left [ 16.225173][ T342] ip (342) used greatest stack depth: 23536 bytes left [ 29.229746][ T439] [ 29.229992][ T439] ============================================ [ 29.230279][ T439] WARNING: possible recursive locking detected [ 29.230563][ T439] 6.13.0-rc5-virtme #1 Not tainted [ 29.230788][ T439] -------------------------------------------- [ 29.231069][ T439] ip/439 is trying to acquire lock: [ 29.231299][ T439] ffffffffa3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.231774][ T439] [ 29.231774][ T439] but task is already holding lock: [ 29.232112][ T439] ffffffffa3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.232576][ T439] [ 29.232576][ T439] other info that might help us debug this: [ 29.232913][ T439] Possible unsafe locking scenario: [ 29.232913][ T439] [ 29.233253][ T439] CPU0 [ 29.233428][ T439] ---- [ 29.233595][ T439] lock((netdev_chain).rwsem); [ 29.233825][ T439] lock((netdev_chain).rwsem); [ 29.234059][ T439] [ 29.234059][ T439] *** DEADLOCK *** [ 29.234059][ T439] [ 29.234390][ T439] May be due to missing lock nesting notation [ 29.234390][ T439] [ 29.234733][ T439] 2 locks held by ip/439: [ 29.234916][ T439] #0: ffffffffa3de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.235346][ T439] #1: ffffffffa3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.235863][ T439] [ 29.235863][ T439] stack backtrace: [ 29.236151][ T439] CPU: 3 UID: 0 PID: 439 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.236483][ T439] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.236752][ T439] Call Trace: [ 29.236915][ T439] [ 29.237028][ T439] dump_stack_lvl+0x82/0xd0 [ 29.237246][ T439] print_deadlock_bug+0x40a/0x650 [ 29.237463][ T439] validate_chain+0x5bf/0xae0 [ 29.237680][ T439] ? __pfx_validate_chain+0x10/0x10 [ 29.237895][ T439] ? hlock_class+0x4e/0x130 [ 29.238111][ T439] ? mark_lock+0x38/0x3e0 [ 29.238290][ T439] __lock_acquire+0xb9a/0x1680 [ 29.238509][ T439] lock_acquire.part.0+0xeb/0x330 [ 29.238723][ T439] ? blocking_notifier_call_chain+0x50/0x90 [ 29.238991][ T439] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.239260][ T439] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.239475][ T439] ? trace_lock_acquire+0x14c/0x1f0 [ 29.239696][ T439] ? lock_acquire+0x32/0xc0 [ 29.239923][ T439] ? blocking_notifier_call_chain+0x50/0x90 [ 29.240209][ T439] down_read+0x9f/0x340 [ 29.240383][ T439] ? blocking_notifier_call_chain+0x50/0x90 [ 29.240666][ T439] ? __pfx_down_read+0x10/0x10 [ 29.240892][ T439] ? __lock_release+0x103/0x460 [ 29.241114][ T439] ? netconsole_netdev_event+0x2c1/0x620 [ 29.241335][ T439] ? __pfx___lock_release+0x10/0x10 [ 29.241558][ T439] blocking_notifier_call_chain+0x50/0x90 [ 29.241777][ T439] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.241997][ T439] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.242255][ T439] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.242468][ T439] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.242749][ T439] ? rtnl_is_locked+0x15/0x20 [ 29.242978][ T439] netdev_upper_dev_unlink+0x71/0xa0 [ 29.243192][ T439] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.243463][ T439] ? netconsole_netdev_event+0x2c1/0x620 [ 29.243699][ T439] ? mutex_is_locked+0x1c/0x60 [ 29.243931][ T439] ? rtnl_is_locked+0x15/0x20 [ 29.244165][ T439] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.244445][ T439] vrf_device_event+0x78/0xe0 [vrf] [ 29.244692][ T439] notifier_call_chain+0xcd/0x150 [ 29.244911][ T439] blocking_notifier_call_chain+0x66/0x90 [ 29.245136][ T439] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.245401][ T439] ? find_held_lock+0x2c/0x110 [ 29.245622][ T439] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.245901][ T439] ? __pfx___lock_release+0x10/0x10 [ 29.246114][ T439] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.246359][ T439] ? rtnl_is_locked+0x15/0x20 [ 29.246582][ T439] ? unregister_netdevice_queue+0x70/0x410 [ 29.246861][ T439] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.247140][ T439] ? net_generic+0xbb/0x1f0 [ 29.247373][ T439] rtnl_dellink+0x348/0xa40 [ 29.247603][ T439] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.247857][ T439] ? find_held_lock+0x2c/0x110 [ 29.248099][ T439] ? __lock_release+0x103/0x460 [ 29.248333][ T439] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.248567][ T439] ? __pfx___lock_release+0x10/0x10 [ 29.248800][ T439] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.249036][ T439] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.249265][ T439] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.249493][ T439] rtnetlink_rcv_msg+0x712/0xc10 [ 29.249730][ T439] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.249956][ T439] ? hlock_class+0x4e/0x130 [ 29.250186][ T439] ? mark_lock+0x38/0x3e0 [ 29.250360][ T439] ? __lock_acquire+0xb9a/0x1680 [ 29.250587][ T439] netlink_rcv_skb+0x130/0x360 [ 29.250814][ T439] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.251029][ T439] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.251268][ T439] ? netlink_deliver_tap+0x13e/0x340 [ 29.251502][ T439] ? netlink_deliver_tap+0xc3/0x340 [ 29.251737][ T439] netlink_unicast+0x44b/0x710 [ 29.251980][ T439] ? __pfx_netlink_unicast+0x10/0x10 [ 29.252219][ T439] ? find_held_lock+0x2c/0x110 [ 29.252458][ T439] netlink_sendmsg+0x723/0xbe0 [ 29.252687][ T439] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.252928][ T439] ____sys_sendmsg+0x7ac/0xa10 [ 29.253164][ T439] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.253394][ T439] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.253687][ T439] ___sys_sendmsg+0xee/0x170 [ 29.253867][ T439] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.254015][ T439] ? kasan_save_stack+0x34/0x50 [ 29.254164][ T439] ? kasan_save_stack+0x24/0x50 [ 29.254366][ T439] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.254534][ T439] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.254732][ T439] ? __x64_sys_close+0x7c/0xd0 [ 29.254927][ T439] ? do_syscall_64+0xc1/0x1d0 [ 29.255090][ T439] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.255284][ T439] ? __lock_acquire+0xb9a/0x1680 [ 29.255476][ T439] ? find_held_lock+0x2c/0x110 [ 29.255642][ T439] ? __lock_release+0x103/0x460 [ 29.255795][ T439] ? __virt_addr_valid+0x22b/0x430 [ 29.255942][ T439] ? __pfx___lock_release+0x10/0x10 [ 29.256087][ T439] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.256235][ T439] __sys_sendmsg+0x109/0x1a0 [ 29.256384][ T439] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.256529][ T439] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.256729][ T439] do_syscall_64+0xc1/0x1d0 [ 29.256881][ T439] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.257063][ T439] RIP: 0033:0x7fd35951a9a7 [ 29.257216][ T439] 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 [ 29.257792][ T439] RSP: 002b:00007fff535fc4a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.258018][ T439] RAX: ffffffffffffffda RBX: 00007fff535fcbd0 RCX: 00007fd35951a9a7 [ 29.258268][ T439] RDX: 0000000000000000 RSI: 00007fff535fc510 RDI: 0000000000000005 [ 29.258512][ T439] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.258745][ T439] R10: 00007fd3593d8ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.258971][ T439] R13: 0000000067792f7d R14: 0000000000498600 R15: 0000000000000000 [ 29.259192][ T439]