[ 10.787571][ T247] ip (247) used greatest stack depth: 23824 bytes left [ 15.756804][ T326] gre: GRE over IPv4 demultiplexor driver [ 15.769056][ T326] ip_gre: GRE over IPv4 tunneling driver [ 17.596020][ T349] 8021q: 802.1Q VLAN Support v1.8 [ 20.965952][ T387] GACT probability NOT on [ 20.995369][ T385] tc (385) used greatest stack depth: 23696 bytes left [ 1328.944628][T17309] [ 1328.944758][T17309] ============================================ [ 1328.944941][T17309] WARNING: possible recursive locking detected [ 1328.945162][T17309] 6.13.0-rc5-virtme #1 Not tainted [ 1328.945332][T17309] -------------------------------------------- [ 1328.945525][T17309] ip/17309 is trying to acquire lock: [ 1328.945684][T17309] ffffffffb63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1328.946001][T17309] [ 1328.946001][T17309] but task is already holding lock: [ 1328.946220][T17309] ffffffffb63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1328.946540][T17309] [ 1328.946540][T17309] other info that might help us debug this: [ 1328.946754][T17309] Possible unsafe locking scenario: [ 1328.946754][T17309] [ 1328.946969][T17309] CPU0 [ 1328.947080][T17309] ---- [ 1328.947190][T17309] lock((netdev_chain).rwsem); [ 1328.947400][T17309] lock((netdev_chain).rwsem); [ 1328.947617][T17309] [ 1328.947617][T17309] *** DEADLOCK *** [ 1328.947617][T17309] [ 1328.947830][T17309] May be due to missing lock nesting notation [ 1328.947830][T17309] [ 1328.948041][T17309] 2 locks held by ip/17309: [ 1328.948187][T17309] #0: ffffffffb63e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 1328.948477][T17309] #1: ffffffffb63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 1328.948785][T17309] [ 1328.948785][T17309] stack backtrace: [ 1328.948965][T17309] CPU: 3 UID: 0 PID: 17309 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 1328.949199][T17309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1328.949394][T17309] Call Trace: [ 1328.949508][T17309] [ 1328.949586][T17309] dump_stack_lvl+0x82/0xd0 [ 1328.949739][T17309] print_deadlock_bug+0x40a/0x650 [ 1328.949888][T17309] validate_chain+0x5bf/0xae0 [ 1328.950037][T17309] ? __pfx_validate_chain+0x10/0x10 [ 1328.950193][T17309] ? hlock_class+0x4e/0x130 [ 1328.950353][T17309] ? mark_lock+0x38/0x3e0 [ 1328.950487][T17309] __lock_acquire+0xb9a/0x1680 [ 1328.950637][T17309] lock_acquire.part.0+0xeb/0x330 [ 1328.950782][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1328.950965][T17309] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 1328.951148][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1328.951307][T17309] ? trace_lock_acquire+0x14c/0x1f0 [ 1328.951459][T17309] ? lock_acquire+0x32/0xc0 [ 1328.951604][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1328.951785][T17309] down_read+0x9f/0x340 [ 1328.951897][T17309] ? blocking_notifier_call_chain+0x50/0x90 [ 1328.952081][T17309] ? __pfx_down_read+0x10/0x10 [ 1328.952227][T17309] ? __lock_release+0x103/0x460 [ 1328.952388][T17309] ? netconsole_netdev_event+0x2c1/0x620 [ 1328.952539][T17309] ? __pfx___lock_release+0x10/0x10 [ 1328.952688][T17309] blocking_notifier_call_chain+0x50/0x90 [ 1328.952831][T17309] __netdev_upper_dev_unlink+0xd9/0x220 [ 1328.952977][T17309] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 1328.953161][T17309] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 1328.953357][T17309] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 1328.953651][T17309] ? rtnl_is_locked+0x15/0x20 [ 1328.953889][T17309] netdev_upper_dev_unlink+0x71/0xa0 [ 1328.954127][T17309] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 1328.954409][T17309] ? netconsole_netdev_event+0x2c1/0x620 [ 1328.954642][T17309] ? mutex_is_locked+0x1c/0x60 [ 1328.954855][T17309] ? rtnl_is_locked+0x15/0x20 [ 1328.955007][T17309] ? netdev_master_upper_dev_get+0x13/0x120 [ 1328.955200][T17309] vrf_device_event+0x78/0xe0 [vrf] [ 1328.955352][T17309] notifier_call_chain+0xcd/0x150 [ 1328.955500][T17309] blocking_notifier_call_chain+0x66/0x90 [ 1328.955649][T17309] unregister_netdevice_many_notify+0xa7b/0x1580 [ 1328.955836][T17309] ? hlock_class+0x4e/0x130 [ 1328.955982][T17309] ? mark_lock+0x38/0x3e0 [ 1328.956095][T17309] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 1328.956280][T17309] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1328.956463][T17309] ? kfree+0xf3/0x330 [ 1328.956575][T17309] ? vlan_vid_del+0x310/0x5e0 [ 1328.956728][T17309] ? vlan_vid_del+0x310/0x5e0 [ 1328.956877][T17309] rtnl_dellink+0x348/0xa40 [ 1328.957024][T17309] ? __pfx_rtnl_dellink+0x10/0x10 [ 1328.957186][T17309] ? find_held_lock+0x2c/0x110 [ 1328.957333][T17309] ? __lock_release+0x103/0x460 [ 1328.957483][T17309] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1328.957629][T17309] ? __pfx___lock_release+0x10/0x10 [ 1328.957773][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1328.957920][T17309] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 1328.958068][T17309] ? __pfx_rtnl_dellink+0x10/0x10 [ 1328.958215][T17309] rtnetlink_rcv_msg+0x712/0xc10 [ 1328.958360][T17309] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1328.958510][T17309] ? hlock_class+0x4e/0x130 [ 1328.958654][T17309] ? mark_lock+0x38/0x3e0 [ 1328.958765][T17309] ? __lock_acquire+0xb9a/0x1680 [ 1328.958913][T17309] netlink_rcv_skb+0x130/0x360 [ 1328.959059][T17309] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 1328.959205][T17309] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 1328.959354][T17309] ? netlink_deliver_tap+0x13e/0x340 [ 1328.959505][T17309] ? netlink_deliver_tap+0xc3/0x340 [ 1328.959652][T17309] netlink_unicast+0x44b/0x710 [ 1328.959798][T17309] ? __pfx_netlink_unicast+0x10/0x10 [ 1328.959942][T17309] ? find_held_lock+0x2c/0x110 [ 1328.960090][T17309] netlink_sendmsg+0x723/0xbe0 [ 1328.960236][T17309] ? __pfx_netlink_sendmsg+0x10/0x10 [ 1328.960385][T17309] ____sys_sendmsg+0x7ac/0xa10 [ 1328.960548][T17309] ? __pfx_____sys_sendmsg+0x10/0x10 [ 1328.960692][T17309] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 1328.960877][T17309] ___sys_sendmsg+0xee/0x170 [ 1328.961022][T17309] ? __pfx____sys_sendmsg+0x10/0x10 [ 1328.961167][T17309] ? kasan_save_stack+0x34/0x50 [ 1328.961310][T17309] ? kasan_save_stack+0x24/0x50 [ 1328.961457][T17309] ? __kasan_record_aux_stack+0x8e/0xa0 [ 1328.961610][T17309] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 1328.961792][T17309] ? __x64_sys_close+0x7c/0xd0 [ 1328.961935][T17309] ? do_syscall_64+0xc1/0x1d0 [ 1328.962081][T17309] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1328.962262][T17309] ? __lock_acquire+0xb9a/0x1680 [ 1328.962409][T17309] ? find_held_lock+0x2c/0x110 [ 1328.962576][T17309] ? __lock_release+0x103/0x460 [ 1328.962725][T17309] ? __virt_addr_valid+0x22b/0x430 [ 1328.962878][T17309] ? __pfx___lock_release+0x10/0x10 [ 1328.963022][T17309] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1328.963170][T17309] __sys_sendmsg+0x109/0x1a0 [ 1328.963319][T17309] ? __pfx___sys_sendmsg+0x10/0x10 [ 1328.963471][T17309] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 1328.963660][T17309] do_syscall_64+0xc1/0x1d0 [ 1328.963813][T17309] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1328.963993][T17309] RIP: 0033:0x7fb11c1fd9a7 [ 1328.964148][T17309] 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 [ 1328.964667][T17309] RSP: 002b:00007ffed169bbe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1328.964898][T17309] RAX: ffffffffffffffda RBX: 00007ffed169c310 RCX: 00007fb11c1fd9a7 [ 1328.965121][T17309] RDX: 0000000000000000 RSI: 00007ffed169bc50 RDI: 0000000000000005 [ 1328.965340][T17309] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 1328.965557][T17309] R10: 00007fb11c0bbef8 R11: 0000000000000246 R12: 0000000000000002 [ 1328.965780][T17309] R13: 000000006779005d R14: 0000000000498600 R15: 0000000000000000 [ 1328.966005][T17309]