[ 23.851599][ T405] ip (405) used greatest stack depth: 23248 bytes left [ 28.021979][ T471] gre: GRE over IPv4 demultiplexor driver [ 28.036541][ T471] ip_gre: GRE over IPv4 tunneling driver [ 29.575404][ T493] 8021q: 802.1Q VLAN Support v1.8 [ 32.574570][ T531] GACT probability NOT on [ 178.722179][ T743] [ 178.722382][ T743] ============================================ [ 178.722593][ T743] WARNING: possible recursive locking detected [ 178.722794][ T743] 6.13.0-rc5-virtme #1 Not tainted [ 178.722953][ T743] -------------------------------------------- [ 178.723159][ T743] ip/743 is trying to acquire lock: [ 178.723322][ T743] ffffffffa73d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 178.723654][ T743] [ 178.723654][ T743] but task is already holding lock: [ 178.723886][ T743] ffffffffa73d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 178.724202][ T743] [ 178.724202][ T743] other info that might help us debug this: [ 178.724435][ T743] Possible unsafe locking scenario: [ 178.724435][ T743] [ 178.724669][ T743] CPU0 [ 178.724787][ T743] ---- [ 178.724907][ T743] lock((netdev_chain).rwsem); [ 178.725068][ T743] lock((netdev_chain).rwsem); [ 178.725233][ T743] [ 178.725233][ T743] *** DEADLOCK *** [ 178.725233][ T743] [ 178.725463][ T743] May be due to missing lock nesting notation [ 178.725463][ T743] [ 178.725695][ T743] 2 locks held by ip/743: [ 178.725814][ T743] #0: ffffffffa73e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 178.726113][ T743] #1: ffffffffa73d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 178.726440][ T743] [ 178.726440][ T743] stack backtrace: [ 178.726636][ T743] CPU: 2 UID: 0 PID: 743 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 178.726871][ T743] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 178.727068][ T743] Call Trace: [ 178.727188][ T743] [ 178.727271][ T743] dump_stack_lvl+0x82/0xd0 [ 178.727436][ T743] print_deadlock_bug+0x40a/0x650 [ 178.727602][ T743] validate_chain+0x5bf/0xae0 [ 178.727768][ T743] ? __pfx_validate_chain+0x10/0x10 [ 178.727927][ T743] ? hlock_class+0x4e/0x130 [ 178.728083][ T743] ? mark_lock+0x38/0x3e0 [ 178.728203][ T743] __lock_acquire+0xb9a/0x1680 [ 178.728366][ T743] lock_acquire.part.0+0xeb/0x330 [ 178.728523][ T743] ? blocking_notifier_call_chain+0x50/0x90 [ 178.728720][ T743] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 178.728923][ T743] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 178.729083][ T743] ? trace_lock_acquire+0x14c/0x1f0 [ 178.729243][ T743] ? lock_acquire+0x32/0xc0 [ 178.729400][ T743] ? blocking_notifier_call_chain+0x50/0x90 [ 178.729584][ T743] down_read+0x9f/0x340 [ 178.729693][ T743] ? blocking_notifier_call_chain+0x50/0x90 [ 178.729871][ T743] ? __pfx_down_read+0x10/0x10 [ 178.730020][ T743] ? __lock_release+0x103/0x460 [ 178.730175][ T743] ? netconsole_netdev_event+0x2c1/0x620 [ 178.730322][ T743] ? __pfx___lock_release+0x10/0x10 [ 178.730467][ T743] blocking_notifier_call_chain+0x50/0x90 [ 178.730612][ T743] __netdev_upper_dev_unlink+0xd9/0x220 [ 178.730759][ T743] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 178.730937][ T743] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 178.731085][ T743] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 178.731265][ T743] ? rtnl_is_locked+0x15/0x20 [ 178.731411][ T743] netdev_upper_dev_unlink+0x71/0xa0 [ 178.731559][ T743] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 178.731736][ T743] ? netconsole_netdev_event+0x2c1/0x620 [ 178.731881][ T743] ? mutex_is_locked+0x1c/0x60 [ 178.732028][ T743] ? rtnl_is_locked+0x15/0x20 [ 178.732170][ T743] ? netdev_master_upper_dev_get+0x13/0x120 [ 178.732349][ T743] vrf_device_event+0x78/0xe0 [vrf] [ 178.732498][ T743] notifier_call_chain+0xcd/0x150 [ 178.732654][ T743] blocking_notifier_call_chain+0x66/0x90 [ 178.732811][ T743] unregister_netdevice_many_notify+0xa7b/0x1580 [ 178.733006][ T743] ? hlock_class+0x4e/0x130 [ 178.733169][ T743] ? mark_lock+0x38/0x3e0 [ 178.733288][ T743] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 178.733483][ T743] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 178.733668][ T743] ? kfree+0xf3/0x330 [ 178.733779][ T743] ? vlan_vid_del+0x310/0x5e0 [ 178.733925][ T743] ? vlan_vid_del+0x310/0x5e0 [ 178.734075][ T743] rtnl_dellink+0x348/0xa40 [ 178.734220][ T743] ? __pfx_rtnl_dellink+0x10/0x10 [ 178.734383][ T743] ? find_held_lock+0x2c/0x110 [ 178.734528][ T743] ? __lock_release+0x103/0x460 [ 178.734674][ T743] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 178.734819][ T743] ? __pfx___lock_release+0x10/0x10 [ 178.734965][ T743] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 178.735118][ T743] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 178.735261][ T743] ? __pfx_rtnl_dellink+0x10/0x10 [ 178.735412][ T743] rtnetlink_rcv_msg+0x712/0xc10 [ 178.735561][ T743] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 178.735704][ T743] ? hlock_class+0x4e/0x130 [ 178.735846][ T743] ? mark_lock+0x38/0x3e0 [ 178.735957][ T743] ? __lock_acquire+0xb9a/0x1680 [ 178.736102][ T743] netlink_rcv_skb+0x130/0x360 [ 178.736249][ T743] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 178.736396][ T743] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 178.736545][ T743] ? netlink_deliver_tap+0x13e/0x340 [ 178.736692][ T743] ? netlink_deliver_tap+0xc3/0x340 [ 178.736837][ T743] netlink_unicast+0x44b/0x710 [ 178.736981][ T743] ? __pfx_netlink_unicast+0x10/0x10 [ 178.737125][ T743] ? find_held_lock+0x2c/0x110 [ 178.737272][ T743] netlink_sendmsg+0x723/0xbe0 [ 178.737421][ T743] ? __pfx_netlink_sendmsg+0x10/0x10 [ 178.737595][ T743] ____sys_sendmsg+0x7ac/0xa10 [ 178.737773][ T743] ? __pfx_____sys_sendmsg+0x10/0x10 [ 178.737919][ T743] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 178.738108][ T743] ___sys_sendmsg+0xee/0x170 [ 178.738254][ T743] ? __pfx____sys_sendmsg+0x10/0x10 [ 178.738405][ T743] ? kasan_save_stack+0x34/0x50 [ 178.738563][ T743] ? kasan_save_stack+0x24/0x50 [ 178.738706][ T743] ? __kasan_record_aux_stack+0x8e/0xa0 [ 178.738856][ T743] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 178.739046][ T743] ? __x64_sys_close+0x7c/0xd0 [ 178.739193][ T743] ? do_syscall_64+0xc1/0x1d0 [ 178.739339][ T743] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 178.739522][ T743] ? __lock_acquire+0xb9a/0x1680 [ 178.739675][ T743] ? find_held_lock+0x2c/0x110 [ 178.739827][ T743] ? __lock_release+0x103/0x460 [ 178.739977][ T743] ? __virt_addr_valid+0x22b/0x430 [ 178.740122][ T743] ? __pfx___lock_release+0x10/0x10 [ 178.740276][ T743] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 178.740425][ T743] __sys_sendmsg+0x109/0x1a0 [ 178.740575][ T743] ? __pfx___sys_sendmsg+0x10/0x10 [ 178.740720][ T743] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 178.740910][ T743] do_syscall_64+0xc1/0x1d0 [ 178.741055][ T743] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 178.741243][ T743] RIP: 0033:0x7f6a04ce29a7 [ 178.741402][ T743] 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 [ 178.741925][ T743] RSP: 002b:00007ffcc1213de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 178.742151][ T743] RAX: ffffffffffffffda RBX: 00007ffcc1214510 RCX: 00007f6a04ce29a7 [ 178.742371][ T743] RDX: 0000000000000000 RSI: 00007ffcc1213e50 RDI: 0000000000000005 [ 178.742597][ T743] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 178.742822][ T743] R10: 00007f6a04ba0ef8 R11: 0000000000000246 R12: 0000000000000002 [ 178.743045][ T743] R13: 0000000067790219 R14: 0000000000498600 R15: 0000000000000000 [ 178.743275][ T743]