[ 12.405712][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 14.565777][ T315] br1: port 1(veth1) entered blocking state [ 14.566222][ T315] br1: port 1(veth1) entered disabled state [ 14.566623][ T315] veth1: entered allmulticast mode [ 14.568594][ T315] veth1: entered promiscuous mode [ 14.651371][ T37] br1: port 1(veth1) entered blocking state [ 14.651756][ T37] br1: port 1(veth1) entered forwarding state [ 24.818331][ T375] ip (375) used greatest stack depth: 23408 bytes left [ 27.959078][ T415] br1: port 1(veth1) entered disabled state [ 28.045199][ T416] veth1: left allmulticast mode [ 28.045467][ T416] veth1: left promiscuous mode [ 28.045802][ T416] br1: port 1(veth1) entered disabled state [ 29.381950][ T433] [ 29.382146][ T433] ============================================ [ 29.382331][ T433] WARNING: possible recursive locking detected [ 29.382512][ T433] 6.13.0-rc5-virtme #1 Not tainted [ 29.382658][ T433] -------------------------------------------- [ 29.382838][ T433] ip/433 is trying to acquire lock: [ 29.382984][ T433] ffffffff96fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.383290][ T433] [ 29.383290][ T433] but task is already holding lock: [ 29.383501][ T433] ffffffff96fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.383793][ T433] [ 29.383793][ T433] other info that might help us debug this: [ 29.384002][ T433] Possible unsafe locking scenario: [ 29.384002][ T433] [ 29.384217][ T433] CPU0 [ 29.384325][ T433] ---- [ 29.384435][ T433] lock((netdev_chain).rwsem); [ 29.384581][ T433] lock((netdev_chain).rwsem); [ 29.384730][ T433] [ 29.384730][ T433] *** DEADLOCK *** [ 29.384730][ T433] [ 29.384942][ T433] May be due to missing lock nesting notation [ 29.384942][ T433] [ 29.385156][ T433] 2 locks held by ip/433: [ 29.385268][ T433] #0: ffffffff96fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.385535][ T433] #1: ffffffff96fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.385831][ T433] [ 29.385831][ T433] stack backtrace: [ 29.386014][ T433] CPU: 3 UID: 0 PID: 433 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.386231][ T433] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.386411][ T433] Call Trace: [ 29.386522][ T433] [ 29.386597][ T433] dump_stack_lvl+0x82/0xd0 [ 29.386764][ T433] print_deadlock_bug+0x40a/0x650 [ 29.386910][ T433] validate_chain+0x5bf/0xae0 [ 29.387063][ T433] ? __pfx_validate_chain+0x10/0x10 [ 29.387211][ T433] ? hlock_class+0x4e/0x130 [ 29.387356][ T433] ? mark_lock+0x38/0x3e0 [ 29.387467][ T433] __lock_acquire+0xb9a/0x1680 [ 29.387617][ T433] lock_acquire.part.0+0xeb/0x330 [ 29.387763][ T433] ? blocking_notifier_call_chain+0x50/0x90 [ 29.387943][ T433] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.388129][ T433] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.388277][ T433] ? trace_lock_acquire+0x14c/0x1f0 [ 29.388422][ T433] ? lock_acquire+0x32/0xc0 [ 29.388566][ T433] ? blocking_notifier_call_chain+0x50/0x90 [ 29.388747][ T433] down_read+0x9f/0x340 [ 29.388879][ T433] ? blocking_notifier_call_chain+0x50/0x90 [ 29.389062][ T433] ? __pfx_down_read+0x10/0x10 [ 29.389211][ T433] ? __lock_release+0x103/0x460 [ 29.389356][ T433] ? netconsole_netdev_event+0x2c1/0x620 [ 29.389501][ T433] ? __pfx___lock_release+0x10/0x10 [ 29.389649][ T433] blocking_notifier_call_chain+0x50/0x90 [ 29.389795][ T433] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.389941][ T433] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.390120][ T433] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.390277][ T433] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.390458][ T433] ? rtnl_is_locked+0x15/0x20 [ 29.390605][ T433] netdev_upper_dev_unlink+0x71/0xa0 [ 29.390749][ T433] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.390935][ T433] ? netconsole_netdev_event+0x2c1/0x620 [ 29.391096][ T433] ? mutex_is_locked+0x1c/0x60 [ 29.391245][ T433] ? rtnl_is_locked+0x15/0x20 [ 29.391394][ T433] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.391575][ T433] vrf_device_event+0x78/0xe0 [vrf] [ 29.391724][ T433] notifier_call_chain+0xcd/0x150 [ 29.391870][ T433] blocking_notifier_call_chain+0x66/0x90 [ 29.392030][ T433] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.392209][ T433] ? __lock_release+0x103/0x460 [ 29.392353][ T433] ? __pfx___lock_release+0x10/0x10 [ 29.392503][ T433] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.392682][ T433] ? hlock_class+0x4e/0x130 [ 29.392829][ T433] ? mark_held_locks+0x9e/0xe0 [ 29.392975][ T433] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 29.393121][ T433] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 29.393302][ T433] rtnl_dellink+0x348/0xa40 [ 29.393453][ T433] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.393613][ T433] ? find_held_lock+0x2c/0x110 [ 29.393760][ T433] ? __lock_release+0x103/0x460 [ 29.393909][ T433] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.394054][ T433] ? __pfx___lock_release+0x10/0x10 [ 29.394200][ T433] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.394347][ T433] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.394495][ T433] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.394640][ T433] rtnetlink_rcv_msg+0x712/0xc10 [ 29.394787][ T433] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.394931][ T433] ? hlock_class+0x4e/0x130 [ 29.395075][ T433] ? mark_lock+0x38/0x3e0 [ 29.395187][ T433] ? __lock_acquire+0xb9a/0x1680 [ 29.395334][ T433] netlink_rcv_skb+0x130/0x360 [ 29.395481][ T433] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.395631][ T433] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.395779][ T433] ? netlink_deliver_tap+0x13e/0x340 [ 29.395928][ T433] ? netlink_deliver_tap+0xc3/0x340 [ 29.396074][ T433] netlink_unicast+0x44b/0x710 [ 29.396220][ T433] ? __pfx_netlink_unicast+0x10/0x10 [ 29.396365][ T433] ? find_held_lock+0x2c/0x110 [ 29.396515][ T433] netlink_sendmsg+0x723/0xbe0 [ 29.396664][ T433] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.396822][ T433] ____sys_sendmsg+0x7ac/0xa10 [ 29.396966][ T433] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.397112][ T433] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.397295][ T433] ___sys_sendmsg+0xee/0x170 [ 29.397438][ T433] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.397582][ T433] ? kasan_save_stack+0x34/0x50 [ 29.397732][ T433] ? kasan_save_stack+0x24/0x50 [ 29.397877][ T433] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.398024][ T433] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.398206][ T433] ? __x64_sys_close+0x7c/0xd0 [ 29.398351][ T433] ? do_syscall_64+0xc1/0x1d0 [ 29.398494][ T433] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.398675][ T433] ? __lock_acquire+0xb9a/0x1680 [ 29.398827][ T433] ? find_held_lock+0x2c/0x110 [ 29.398976][ T433] ? __lock_release+0x103/0x460 [ 29.399130][ T433] ? __virt_addr_valid+0x22b/0x430 [ 29.399277][ T433] ? __pfx___lock_release+0x10/0x10 [ 29.399423][ T433] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.399570][ T433] __sys_sendmsg+0x109/0x1a0 [ 29.399716][ T433] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.399864][ T433] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.400050][ T433] do_syscall_64+0xc1/0x1d0 [ 29.400195][ T433] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.400373][ T433] RIP: 0033:0x7fa792ef49a7 [ 29.400523][ T433] 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 [ 29.401032][ T433] RSP: 002b:00007ffe3106bb08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.401252][ T433] RAX: ffffffffffffffda RBX: 00007ffe3106c230 RCX: 00007fa792ef49a7 [ 29.401468][ T433] RDX: 0000000000000000 RSI: 00007ffe3106bb70 RDI: 0000000000000005 [ 29.401685][ T433] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.401909][ T433] R10: 00007fa792db2ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.402126][ T433] R13: 0000000067792fad R14: 0000000000498600 R15: 0000000000000000 [ 29.402348][ T433]