[ 13.186025][ T286] 8021q: 802.1Q VLAN Support v1.8 [ 15.433643][ T315] br1: port 1(veth1) entered blocking state [ 15.434172][ T315] br1: port 1(veth1) entered disabled state [ 15.434622][ T315] veth1: entered allmulticast mode [ 15.436712][ T315] veth1: entered promiscuous mode [ 15.523028][ T37] br1: port 1(veth1) entered blocking state [ 15.523718][ T37] br1: port 1(veth1) entered forwarding state [ 26.021066][ T374] ip (374) used greatest stack depth: 23400 bytes left [ 29.439905][ T414] br1: port 1(veth1) entered disabled state [ 29.525066][ T415] veth1: left allmulticast mode [ 29.525405][ T415] veth1: left promiscuous mode [ 29.526134][ T415] br1: port 1(veth1) entered disabled state [ 30.948518][ T432] [ 30.948656][ T432] ============================================ [ 30.948843][ T432] WARNING: possible recursive locking detected [ 30.949023][ T432] 6.13.0-rc5-virtme #1 Not tainted [ 30.949171][ T432] -------------------------------------------- [ 30.949350][ T432] ip/432 is trying to acquire lock: [ 30.949495][ T432] ffffffffa63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.949819][ T432] [ 30.949819][ T432] but task is already holding lock: [ 30.950045][ T432] ffffffffa63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.950341][ T432] [ 30.950341][ T432] other info that might help us debug this: [ 30.950549][ T432] Possible unsafe locking scenario: [ 30.950549][ T432] [ 30.950760][ T432] CPU0 [ 30.950869][ T432] ---- [ 30.950976][ T432] lock((netdev_chain).rwsem); [ 30.951125][ T432] lock((netdev_chain).rwsem); [ 30.951269][ T432] [ 30.951269][ T432] *** DEADLOCK *** [ 30.951269][ T432] [ 30.951481][ T432] May be due to missing lock nesting notation [ 30.951481][ T432] [ 30.951691][ T432] 2 locks held by ip/432: [ 30.951800][ T432] #0: ffffffffa63e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 30.952069][ T432] #1: ffffffffa63d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.952376][ T432] [ 30.952376][ T432] stack backtrace: [ 30.952561][ T432] CPU: 0 UID: 0 PID: 432 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 30.952780][ T432] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.952959][ T432] Call Trace: [ 30.953069][ T432] [ 30.953151][ T432] dump_stack_lvl+0x82/0xd0 [ 30.953304][ T432] print_deadlock_bug+0x40a/0x650 [ 30.953453][ T432] validate_chain+0x5bf/0xae0 [ 30.953600][ T432] ? __pfx_validate_chain+0x10/0x10 [ 30.953748][ T432] ? hlock_class+0x4e/0x130 [ 30.953895][ T432] ? mark_lock+0x38/0x3e0 [ 30.954008][ T432] __lock_acquire+0xb9a/0x1680 [ 30.954154][ T432] lock_acquire.part.0+0xeb/0x330 [ 30.954304][ T432] ? blocking_notifier_call_chain+0x50/0x90 [ 30.954486][ T432] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 30.954670][ T432] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.954817][ T432] ? trace_lock_acquire+0x14c/0x1f0 [ 30.954964][ T432] ? lock_acquire+0x32/0xc0 [ 30.955109][ T432] ? blocking_notifier_call_chain+0x50/0x90 [ 30.955292][ T432] down_read+0x9f/0x340 [ 30.955407][ T432] ? blocking_notifier_call_chain+0x50/0x90 [ 30.955591][ T432] ? __pfx_down_read+0x10/0x10 [ 30.955735][ T432] ? __lock_release+0x103/0x460 [ 30.955880][ T432] ? netconsole_netdev_event+0x2c1/0x620 [ 30.956027][ T432] ? __pfx___lock_release+0x10/0x10 [ 30.956176][ T432] blocking_notifier_call_chain+0x50/0x90 [ 30.956323][ T432] __netdev_upper_dev_unlink+0xd9/0x220 [ 30.956479][ T432] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 30.956658][ T432] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 30.956807][ T432] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 30.956988][ T432] ? rtnl_is_locked+0x15/0x20 [ 30.957135][ T432] netdev_upper_dev_unlink+0x71/0xa0 [ 30.957288][ T432] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 30.957473][ T432] ? netconsole_netdev_event+0x2c1/0x620 [ 30.957620][ T432] ? mutex_is_locked+0x1c/0x60 [ 30.957767][ T432] ? rtnl_is_locked+0x15/0x20 [ 30.957913][ T432] ? netdev_master_upper_dev_get+0x13/0x120 [ 30.958094][ T432] vrf_device_event+0x78/0xe0 [vrf] [ 30.958244][ T432] notifier_call_chain+0xcd/0x150 [ 30.958390][ T432] blocking_notifier_call_chain+0x66/0x90 [ 30.958570][ T432] unregister_netdevice_many_notify+0xa7b/0x1580 [ 30.958751][ T432] ? __lock_release+0x103/0x460 [ 30.958897][ T432] ? __pfx___lock_release+0x10/0x10 [ 30.959042][ T432] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.959225][ T432] ? hlock_class+0x4e/0x130 [ 30.959371][ T432] ? mark_held_locks+0x9e/0xe0 [ 30.959516][ T432] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 30.959673][ T432] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 30.959856][ T432] rtnl_dellink+0x348/0xa40 [ 30.960003][ T432] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.960160][ T432] ? find_held_lock+0x2c/0x110 [ 30.960310][ T432] ? __lock_release+0x103/0x460 [ 30.960456][ T432] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.960602][ T432] ? __pfx___lock_release+0x10/0x10 [ 30.960753][ T432] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.960902][ T432] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.961047][ T432] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.961218][ T432] rtnetlink_rcv_msg+0x712/0xc10 [ 30.961363][ T432] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.961510][ T432] ? hlock_class+0x4e/0x130 [ 30.961656][ T432] ? mark_lock+0x38/0x3e0 [ 30.961773][ T432] ? __lock_acquire+0xb9a/0x1680 [ 30.961918][ T432] netlink_rcv_skb+0x130/0x360 [ 30.962083][ T432] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.962230][ T432] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 30.962392][ T432] ? netlink_deliver_tap+0x13e/0x340 [ 30.962541][ T432] ? netlink_deliver_tap+0xc3/0x340 [ 30.962704][ T432] netlink_unicast+0x44b/0x710 [ 30.962858][ T432] ? __pfx_netlink_unicast+0x10/0x10 [ 30.963002][ T432] ? find_held_lock+0x2c/0x110 [ 30.963149][ T432] netlink_sendmsg+0x723/0xbe0 [ 30.963304][ T432] ? __pfx_netlink_sendmsg+0x10/0x10 [ 30.963454][ T432] ____sys_sendmsg+0x7ac/0xa10 [ 30.963610][ T432] ? __pfx_____sys_sendmsg+0x10/0x10 [ 30.963759][ T432] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 30.963949][ T432] ___sys_sendmsg+0xee/0x170 [ 30.964104][ T432] ? __pfx____sys_sendmsg+0x10/0x10 [ 30.964253][ T432] ? kasan_save_stack+0x34/0x50 [ 30.964401][ T432] ? kasan_save_stack+0x24/0x50 [ 30.964554][ T432] ? __kasan_record_aux_stack+0x8e/0xa0 [ 30.964702][ T432] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 30.964886][ T432] ? __x64_sys_close+0x7c/0xd0 [ 30.965032][ T432] ? do_syscall_64+0xc1/0x1d0 [ 30.965193][ T432] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.965382][ T432] ? __lock_acquire+0xb9a/0x1680 [ 30.965530][ T432] ? find_held_lock+0x2c/0x110 [ 30.965678][ T432] ? __lock_release+0x103/0x460 [ 30.965845][ T432] ? __virt_addr_valid+0x22b/0x430 [ 30.966032][ T432] ? __pfx___lock_release+0x10/0x10 [ 30.966182][ T432] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.966337][ T432] __sys_sendmsg+0x109/0x1a0 [ 30.966490][ T432] ? __pfx___sys_sendmsg+0x10/0x10 [ 30.966660][ T432] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 30.966847][ T432] do_syscall_64+0xc1/0x1d0 [ 30.967000][ T432] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.967186][ T432] RIP: 0033:0x7fb052ac99a7 [ 30.967340][ T432] 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 [ 30.967863][ T432] RSP: 002b:00007ffc21baf5f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 30.968093][ T432] RAX: ffffffffffffffda RBX: 00007ffc21bafd20 RCX: 00007fb052ac99a7 [ 30.968316][ T432] RDX: 0000000000000000 RSI: 00007ffc21baf660 RDI: 0000000000000005 [ 30.968544][ T432] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 30.968764][ T432] R10: 00007fb052987ef8 R11: 0000000000000246 R12: 0000000000000002 [ 30.968987][ T432] R13: 0000000067795497 R14: 0000000000498600 R15: 0000000000000000 [ 30.969217][ T432]