[ 709.902001][ T4948] gre: GRE over IPv4 demultiplexor driver [ 709.935753][ T4948] ip_gre: GRE over IPv4 tunneling driver [ 711.536532][ T4970] 8021q: 802.1Q VLAN Support v1.8 [ 874.616127][ T5216] [ 874.616316][ T5216] ============================================ [ 874.616520][ T5216] WARNING: possible recursive locking detected [ 874.616720][ T5216] 6.13.0-rc5-virtme #1 Not tainted [ 874.616890][ T5216] -------------------------------------------- [ 874.617088][ T5216] ip/5216 is trying to acquire lock: [ 874.617249][ T5216] ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 874.617581][ T5216] [ 874.617581][ T5216] but task is already holding lock: [ 874.617819][ T5216] ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 874.618139][ T5216] [ 874.618139][ T5216] other info that might help us debug this: [ 874.618381][ T5216] Possible unsafe locking scenario: [ 874.618381][ T5216] [ 874.618619][ T5216] CPU0 [ 874.618745][ T5216] ---- [ 874.618869][ T5216] lock((netdev_chain).rwsem); [ 874.619040][ T5216] lock((netdev_chain).rwsem); [ 874.619203][ T5216] [ 874.619203][ T5216] *** DEADLOCK *** [ 874.619203][ T5216] [ 874.619442][ T5216] May be due to missing lock nesting notation [ 874.619442][ T5216] [ 874.619674][ T5216] 2 locks held by ip/5216: [ 874.619833][ T5216] #0: ffffffff9a5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 874.620126][ T5216] #1: ffffffff9a5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 874.620482][ T5216] [ 874.620482][ T5216] stack backtrace: [ 874.620680][ T5216] CPU: 0 UID: 0 PID: 5216 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 874.620925][ T5216] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 874.621124][ T5216] Call Trace: [ 874.621245][ T5216] [ 874.621325][ T5216] dump_stack_lvl+0x82/0xd0 [ 874.621493][ T5216] print_deadlock_bug+0x40a/0x650 [ 874.621652][ T5216] validate_chain+0x5bf/0xae0 [ 874.621810][ T5216] ? __pfx_validate_chain+0x10/0x10 [ 874.621974][ T5216] ? hlock_class+0x4e/0x130 [ 874.622129][ T5216] ? mark_lock+0x38/0x3e0 [ 874.622253][ T5216] __lock_acquire+0xb9a/0x1680 [ 874.622417][ T5216] lock_acquire.part.0+0xeb/0x330 [ 874.622578][ T5216] ? blocking_notifier_call_chain+0x50/0x90 [ 874.622784][ T5216] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 874.622989][ T5216] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 874.623150][ T5216] ? trace_lock_acquire+0x14c/0x1f0 [ 874.623313][ T5216] ? lock_acquire+0x32/0xc0 [ 874.623474][ T5216] ? blocking_notifier_call_chain+0x50/0x90 [ 874.623676][ T5216] down_read+0x9f/0x340 [ 874.623799][ T5216] ? blocking_notifier_call_chain+0x50/0x90 [ 874.624005][ T5216] ? __pfx_down_read+0x10/0x10 [ 874.624168][ T5216] ? __lock_release+0x103/0x460 [ 874.624319][ T5216] ? netconsole_netdev_event+0x2c1/0x620 [ 874.624465][ T5216] ? __pfx___lock_release+0x10/0x10 [ 874.624613][ T5216] blocking_notifier_call_chain+0x50/0x90 [ 874.624760][ T5216] __netdev_upper_dev_unlink+0xd9/0x220 [ 874.624911][ T5216] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 874.625106][ T5216] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 874.625263][ T5216] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 874.625456][ T5216] ? rtnl_is_locked+0x15/0x20 [ 874.625609][ T5216] netdev_upper_dev_unlink+0x71/0xa0 [ 874.625755][ T5216] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 874.625940][ T5216] ? netconsole_netdev_event+0x2c1/0x620 [ 874.626100][ T5216] ? mutex_is_locked+0x1c/0x60 [ 874.626260][ T5216] ? rtnl_is_locked+0x15/0x20 [ 874.626407][ T5216] ? netdev_master_upper_dev_get+0x13/0x120 [ 874.626590][ T5216] vrf_device_event+0x78/0xe0 [vrf] [ 874.626750][ T5216] notifier_call_chain+0xcd/0x150 [ 874.626909][ T5216] blocking_notifier_call_chain+0x66/0x90 [ 874.627065][ T5216] unregister_netdevice_many_notify+0xa7b/0x1580 [ 874.627262][ T5216] ? hlock_class+0x4e/0x130 [ 874.627412][ T5216] ? mark_lock+0x38/0x3e0 [ 874.627534][ T5216] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 874.627731][ T5216] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 874.627928][ T5216] ? kfree+0xf3/0x330 [ 874.628051][ T5216] ? vlan_vid_del+0x310/0x5e0 [ 874.628213][ T5216] ? vlan_vid_del+0x310/0x5e0 [ 874.628381][ T5216] rtnl_dellink+0x348/0xa40 [ 874.628544][ T5216] ? __pfx_rtnl_dellink+0x10/0x10 [ 874.628718][ T5216] ? find_held_lock+0x2c/0x110 [ 874.628879][ T5216] ? __lock_release+0x103/0x460 [ 874.629045][ T5216] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 874.629210][ T5216] ? __pfx___lock_release+0x10/0x10 [ 874.629378][ T5216] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 874.629527][ T5216] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 874.629682][ T5216] ? __pfx_rtnl_dellink+0x10/0x10 [ 874.629832][ T5216] rtnetlink_rcv_msg+0x712/0xc10 [ 874.629990][ T5216] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 874.630136][ T5216] ? hlock_class+0x4e/0x130 [ 874.630292][ T5216] ? mark_lock+0x38/0x3e0 [ 874.630405][ T5216] ? __lock_acquire+0xb9a/0x1680 [ 874.630564][ T5216] netlink_rcv_skb+0x130/0x360 [ 874.630715][ T5216] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 874.630867][ T5216] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 874.631029][ T5216] ? netlink_deliver_tap+0x13e/0x340 [ 874.631188][ T5216] ? netlink_deliver_tap+0xc3/0x340 [ 874.631351][ T5216] netlink_unicast+0x44b/0x710 [ 874.631513][ T5216] ? __pfx_netlink_unicast+0x10/0x10 [ 874.631675][ T5216] ? find_held_lock+0x2c/0x110 [ 874.631840][ T5216] netlink_sendmsg+0x723/0xbe0 [ 874.632000][ T5216] ? __pfx_netlink_sendmsg+0x10/0x10 [ 874.632163][ T5216] ____sys_sendmsg+0x7ac/0xa10 [ 874.632324][ T5216] ? __pfx_____sys_sendmsg+0x10/0x10 [ 874.632480][ T5216] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 874.632663][ T5216] ___sys_sendmsg+0xee/0x170 [ 874.632814][ T5216] ? __pfx____sys_sendmsg+0x10/0x10 [ 874.632971][ T5216] ? kasan_save_stack+0x34/0x50 [ 874.633131][ T5216] ? kasan_save_stack+0x24/0x50 [ 874.633282][ T5216] ? __kasan_record_aux_stack+0x8e/0xa0 [ 874.633431][ T5216] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 874.633616][ T5216] ? __x64_sys_close+0x7c/0xd0 [ 874.633763][ T5216] ? do_syscall_64+0xc1/0x1d0 [ 874.633911][ T5216] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 874.634121][ T5216] ? __lock_acquire+0xb9a/0x1680 [ 874.634285][ T5216] ? find_held_lock+0x2c/0x110 [ 874.634447][ T5216] ? __lock_release+0x103/0x460 [ 874.634609][ T5216] ? __virt_addr_valid+0x22b/0x430 [ 874.634768][ T5216] ? __pfx___lock_release+0x10/0x10 [ 874.634929][ T5216] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 874.635110][ T5216] __sys_sendmsg+0x109/0x1a0 [ 874.635278][ T5216] ? __pfx___sys_sendmsg+0x10/0x10 [ 874.635441][ T5216] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 874.635628][ T5216] do_syscall_64+0xc1/0x1d0 [ 874.635774][ T5216] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 874.635969][ T5216] RIP: 0033:0x7f119db089a7 [ 874.636124][ T5216] 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 [ 874.636652][ T5216] RSP: 002b:00007ffe361842e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 874.636873][ T5216] RAX: ffffffffffffffda RBX: 00007ffe36184a10 RCX: 00007f119db089a7 [ 874.637095][ T5216] RDX: 0000000000000000 RSI: 00007ffe36184350 RDI: 0000000000000005 [ 874.637316][ T5216] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 874.637540][ T5216] R10: 00007f119d9c6ef8 R11: 0000000000000246 R12: 0000000000000002 [ 874.637761][ T5216] R13: 0000000067792942 R14: 0000000000498600 R15: 0000000000000000 [ 874.637987][ T5216]