[ 14.681702][ T316] 8021q: 802.1Q VLAN Support v1.8 [ 15.021196][ T321] gre: GRE over IPv4 demultiplexor driver [ 15.033949][ T321] ip_gre: GRE over IPv4 tunneling driver [ 15.208578][ T325] ip (325) used greatest stack depth: 24216 bytes left [ 32.606448][ T420] [ 32.606599][ T420] ============================================ [ 32.606823][ T420] WARNING: possible recursive locking detected [ 32.607011][ T420] 6.13.0-rc5-virtme #1 Not tainted [ 32.607161][ T420] -------------------------------------------- [ 32.607338][ T420] ip/420 is trying to acquire lock: [ 32.607489][ T420] ffffffff9e1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.607804][ T420] [ 32.607804][ T420] but task is already holding lock: [ 32.608016][ T420] ffffffff9e1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.608310][ T420] [ 32.608310][ T420] other info that might help us debug this: [ 32.608530][ T420] Possible unsafe locking scenario: [ 32.608530][ T420] [ 32.608743][ T420] CPU0 [ 32.608855][ T420] ---- [ 32.608965][ T420] lock((netdev_chain).rwsem); [ 32.609120][ T420] lock((netdev_chain).rwsem); [ 32.609267][ T420] [ 32.609267][ T420] *** DEADLOCK *** [ 32.609267][ T420] [ 32.609484][ T420] May be due to missing lock nesting notation [ 32.609484][ T420] [ 32.609703][ T420] 2 locks held by ip/420: [ 32.609818][ T420] #0: ffffffff9e1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.610095][ T420] #1: ffffffff9e1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.610391][ T420] [ 32.610391][ T420] stack backtrace: [ 32.610571][ T420] CPU: 0 UID: 0 PID: 420 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.610790][ T420] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.610976][ T420] Call Trace: [ 32.611088][ T420] [ 32.611166][ T420] dump_stack_lvl+0x82/0xd0 [ 32.611320][ T420] print_deadlock_bug+0x40a/0x650 [ 32.611469][ T420] validate_chain+0x5bf/0xae0 [ 32.611616][ T420] ? __pfx_validate_chain+0x10/0x10 [ 32.611767][ T420] ? hlock_class+0x4e/0x130 [ 32.611914][ T420] ? mark_lock+0x38/0x3e0 [ 32.612032][ T420] __lock_acquire+0xb9a/0x1680 [ 32.612179][ T420] lock_acquire.part.0+0xeb/0x330 [ 32.612324][ T420] ? blocking_notifier_call_chain+0x50/0x90 [ 32.612508][ T420] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.612692][ T420] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.612840][ T420] ? trace_lock_acquire+0x14c/0x1f0 [ 32.612987][ T420] ? lock_acquire+0x32/0xc0 [ 32.613136][ T420] ? blocking_notifier_call_chain+0x50/0x90 [ 32.613319][ T420] down_read+0x9f/0x340 [ 32.613431][ T420] ? blocking_notifier_call_chain+0x50/0x90 [ 32.613612][ T420] ? __pfx_down_read+0x10/0x10 [ 32.613757][ T420] ? __lock_release+0x103/0x460 [ 32.613903][ T420] ? netconsole_netdev_event+0x2c1/0x620 [ 32.614050][ T420] ? __pfx___lock_release+0x10/0x10 [ 32.614204][ T420] blocking_notifier_call_chain+0x50/0x90 [ 32.614349][ T420] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.614498][ T420] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.614685][ T420] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.614833][ T420] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.615015][ T420] ? rtnl_is_locked+0x15/0x20 [ 32.615164][ T420] netdev_upper_dev_unlink+0x71/0xa0 [ 32.615315][ T420] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.615498][ T420] ? netconsole_netdev_event+0x2c1/0x620 [ 32.615646][ T420] ? mutex_is_locked+0x1c/0x60 [ 32.615793][ T420] ? rtnl_is_locked+0x15/0x20 [ 32.615938][ T420] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.616120][ T420] vrf_device_event+0x78/0xe0 [vrf] [ 32.616276][ T420] notifier_call_chain+0xcd/0x150 [ 32.616424][ T420] blocking_notifier_call_chain+0x66/0x90 [ 32.616572][ T420] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.616786][ T420] ? __lock_release+0x103/0x460 [ 32.616949][ T420] ? __pfx___lock_release+0x10/0x10 [ 32.617115][ T420] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.617319][ T420] ? hlock_class+0x4e/0x130 [ 32.617486][ T420] ? mark_held_locks+0x9e/0xe0 [ 32.617652][ T420] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.617817][ T420] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.618026][ T420] rtnl_dellink+0x348/0xa40 [ 32.618191][ T420] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.618369][ T420] ? find_held_lock+0x2c/0x110 [ 32.618538][ T420] ? __lock_release+0x103/0x460 [ 32.618705][ T420] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.618872][ T420] ? __pfx___lock_release+0x10/0x10 [ 32.619036][ T420] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.619214][ T420] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.619380][ T420] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.619546][ T420] rtnetlink_rcv_msg+0x712/0xc10 [ 32.619712][ T420] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.619883][ T420] ? hlock_class+0x4e/0x130 [ 32.620048][ T420] ? mark_lock+0x38/0x3e0 [ 32.620174][ T420] ? __lock_acquire+0xb9a/0x1680 [ 32.620338][ T420] netlink_rcv_skb+0x130/0x360 [ 32.620505][ T420] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.620673][ T420] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.620842][ T420] ? netlink_deliver_tap+0x13e/0x340 [ 32.621009][ T420] ? netlink_deliver_tap+0xc3/0x340 [ 32.621180][ T420] netlink_unicast+0x44b/0x710 [ 32.621347][ T420] ? __pfx_netlink_unicast+0x10/0x10 [ 32.621511][ T420] ? find_held_lock+0x2c/0x110 [ 32.621678][ T420] netlink_sendmsg+0x723/0xbe0 [ 32.621843][ T420] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.622011][ T420] ____sys_sendmsg+0x7ac/0xa10 [ 32.622175][ T420] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.622345][ T420] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.622554][ T420] ___sys_sendmsg+0xee/0x170 [ 32.622719][ T420] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.622885][ T420] ? kasan_save_stack+0x34/0x50 [ 32.623049][ T420] ? kasan_save_stack+0x24/0x50 [ 32.623217][ T420] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.623383][ T420] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.623595][ T420] ? __x64_sys_close+0x7c/0xd0 [ 32.623760][ T420] ? do_syscall_64+0xc1/0x1d0 [ 32.623928][ T420] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.624136][ T420] ? __lock_acquire+0xb9a/0x1680 [ 32.624302][ T420] ? find_held_lock+0x2c/0x110 [ 32.624468][ T420] ? __lock_release+0x103/0x460 [ 32.624632][ T420] ? __virt_addr_valid+0x22b/0x430 [ 32.624803][ T420] ? __pfx___lock_release+0x10/0x10 [ 32.624968][ T420] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.625135][ T420] __sys_sendmsg+0x109/0x1a0 [ 32.625300][ T420] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.625469][ T420] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.625678][ T420] do_syscall_64+0xc1/0x1d0 [ 32.625842][ T420] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.626052][ T420] RIP: 0033:0x7f84eb1039a7 [ 32.626225][ T420] 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 [ 32.626800][ T420] RSP: 002b:00007ffcc9d720a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.627050][ T420] RAX: ffffffffffffffda RBX: 00007ffcc9d727d0 RCX: 00007f84eb1039a7 [ 32.627305][ T420] RDX: 0000000000000000 RSI: 00007ffcc9d72110 RDI: 0000000000000005 [ 32.627552][ T420] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.627799][ T420] R10: 00007f84eafc1ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.628045][ T420] R13: 000000006779547f R14: 0000000000498600 R15: 0000000000000000 [ 32.628296][ T420] [ 32.661679][ T420] ip (420) used greatest stack depth: 23888 bytes left