[ 10.534821][ T250] ip (250) used greatest stack depth: 24432 bytes left [ 10.895260][ T260] ip (260) used greatest stack depth: 23240 bytes left [ 15.420504][ T333] 8021q: 802.1Q VLAN Support v1.8 [ 15.884133][ T339] gre: GRE over IPv4 demultiplexor driver [ 15.897700][ T339] ip_gre: GRE over IPv4 tunneling driver [ 29.321671][ T442] [ 29.321912][ T442] ============================================ [ 29.322106][ T442] WARNING: possible recursive locking detected [ 29.322288][ T442] 6.13.0-rc5-virtme #1 Not tainted [ 29.322443][ T442] -------------------------------------------- [ 29.322630][ T442] ip/442 is trying to acquire lock: [ 29.322805][ T442] ffffffffa65d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.323115][ T442] [ 29.323115][ T442] but task is already holding lock: [ 29.323338][ T442] ffffffffa65d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.323643][ T442] [ 29.323643][ T442] other info that might help us debug this: [ 29.323863][ T442] Possible unsafe locking scenario: [ 29.323863][ T442] [ 29.324079][ T442] CPU0 [ 29.324191][ T442] ---- [ 29.324303][ T442] lock((netdev_chain).rwsem); [ 29.324463][ T442] lock((netdev_chain).rwsem); [ 29.324641][ T442] [ 29.324641][ T442] *** DEADLOCK *** [ 29.324641][ T442] [ 29.324968][ T442] May be due to missing lock nesting notation [ 29.324968][ T442] [ 29.325300][ T442] 2 locks held by ip/442: [ 29.325475][ T442] #0: ffffffffa65e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.325889][ T442] #1: ffffffffa65d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.326375][ T442] [ 29.326375][ T442] stack backtrace: [ 29.326660][ T442] CPU: 3 UID: 0 PID: 442 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.327002][ T442] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.327319][ T442] Call Trace: [ 29.327501][ T442] [ 29.327629][ T442] dump_stack_lvl+0x82/0xd0 [ 29.327876][ T442] print_deadlock_bug+0x40a/0x650 [ 29.328111][ T442] validate_chain+0x5bf/0xae0 [ 29.328344][ T442] ? __pfx_validate_chain+0x10/0x10 [ 29.328584][ T442] ? hlock_class+0x4e/0x130 [ 29.328831][ T442] ? mark_lock+0x38/0x3e0 [ 29.329024][ T442] __lock_acquire+0xb9a/0x1680 [ 29.329272][ T442] lock_acquire.part.0+0xeb/0x330 [ 29.329513][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.329816][ T442] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.330113][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.330358][ T442] ? trace_lock_acquire+0x14c/0x1f0 [ 29.330602][ T442] ? lock_acquire+0x32/0xc0 [ 29.330852][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.331153][ T442] down_read+0x9f/0x340 [ 29.331335][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.331633][ T442] ? __pfx_down_read+0x10/0x10 [ 29.331868][ T442] ? __lock_release+0x103/0x460 [ 29.332089][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.332322][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.332505][ T442] blocking_notifier_call_chain+0x50/0x90 [ 29.332667][ T442] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.332819][ T442] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.333032][ T442] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.333184][ T442] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.333372][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.333525][ T442] netdev_upper_dev_unlink+0x71/0xa0 [ 29.333681][ T442] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.333866][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.334049][ T442] ? mutex_is_locked+0x1c/0x60 [ 29.334200][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.334350][ T442] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.334541][ T442] vrf_device_event+0x78/0xe0 [vrf] [ 29.334695][ T442] notifier_call_chain+0xcd/0x150 [ 29.334850][ T442] blocking_notifier_call_chain+0x66/0x90 [ 29.335043][ T442] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.335230][ T442] ? find_held_lock+0x2c/0x110 [ 29.335385][ T442] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.335572][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.335722][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.335882][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.336062][ T442] ? unregister_netdevice_queue+0x70/0x410 [ 29.336275][ T442] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.336462][ T442] ? net_generic+0xbb/0x1f0 [ 29.336614][ T442] rtnl_dellink+0x348/0xa40 [ 29.336765][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.336961][ T442] ? find_held_lock+0x2c/0x110 [ 29.337119][ T442] ? __lock_release+0x103/0x460 [ 29.337276][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.337424][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.337572][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.337724][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.337873][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.338036][ T442] rtnetlink_rcv_msg+0x712/0xc10 [ 29.338186][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.338341][ T442] ? hlock_class+0x4e/0x130 [ 29.338491][ T442] ? mark_lock+0x38/0x3e0 [ 29.338606][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.338757][ T442] netlink_rcv_skb+0x130/0x360 [ 29.338926][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.339084][ T442] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.339238][ T442] ? netlink_deliver_tap+0x13e/0x340 [ 29.339394][ T442] ? netlink_deliver_tap+0xc3/0x340 [ 29.339546][ T442] netlink_unicast+0x44b/0x710 [ 29.339697][ T442] ? __pfx_netlink_unicast+0x10/0x10 [ 29.339847][ T442] ? find_held_lock+0x2c/0x110 [ 29.340011][ T442] netlink_sendmsg+0x723/0xbe0 [ 29.340162][ T442] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.340314][ T442] ____sys_sendmsg+0x7ac/0xa10 [ 29.340471][ T442] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.340630][ T442] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.340841][ T442] ___sys_sendmsg+0xee/0x170 [ 29.341005][ T442] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.341155][ T442] ? kasan_save_stack+0x34/0x50 [ 29.341306][ T442] ? kasan_save_stack+0x24/0x50 [ 29.341456][ T442] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.341611][ T442] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.341797][ T442] ? __x64_sys_close+0x7c/0xd0 [ 29.341958][ T442] ? do_syscall_64+0xc1/0x1d0 [ 29.342112][ T442] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.342303][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.342456][ T442] ? find_held_lock+0x2c/0x110 [ 29.342608][ T442] ? __lock_release+0x103/0x460 [ 29.342788][ T442] ? __virt_addr_valid+0x22b/0x430 [ 29.342975][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.343125][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.343278][ T442] __sys_sendmsg+0x109/0x1a0 [ 29.343429][ T442] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.343581][ T442] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.343772][ T442] do_syscall_64+0xc1/0x1d0 [ 29.343947][ T442] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.344137][ T442] RIP: 0033:0x7fc4168199a7 [ 29.344296][ T442] 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 [ 29.344826][ T442] RSP: 002b:00007ffd2600d878 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.345071][ T442] RAX: ffffffffffffffda RBX: 00007ffd2600dfa0 RCX: 00007fc4168199a7 [ 29.345304][ T442] RDX: 0000000000000000 RSI: 00007ffd2600d8e0 RDI: 0000000000000005 [ 29.345528][ T442] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.345751][ T442] R10: 00007fc4166d7ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.345982][ T442] R13: 00000000677904c5 R14: 0000000000498600 R15: 0000000000000000 [ 29.346214][ T442]