[ 111.900492][ T1363] 8021q: 802.1Q VLAN Support v1.8 [ 113.914313][ T1392] br1: port 1(veth1) entered blocking state [ 113.914584][ T1392] br1: port 1(veth1) entered disabled state [ 113.914856][ T1392] veth1: entered allmulticast mode [ 113.917501][ T1392] veth1: entered promiscuous mode [ 114.028163][ T1393] br1: port 2(veth2) entered blocking state [ 114.028736][ T1393] br1: port 2(veth2) entered disabled state [ 114.029192][ T1393] veth2: entered allmulticast mode [ 114.032476][ T1393] veth2: entered promiscuous mode [ 114.150393][ T65] br1: port 1(veth1) entered blocking state [ 114.151228][ T65] br1: port 1(veth1) entered forwarding state [ 114.241897][ T40] br1: port 2(veth2) entered blocking state [ 114.242259][ T40] br1: port 2(veth2) entered forwarding state [ 123.941395][ T1456] veth2: left allmulticast mode [ 123.941622][ T1456] veth2: left promiscuous mode [ 123.941938][ T1456] br1: port 2(veth2) entered disabled state [ 124.043981][ T1457] veth1: left allmulticast mode [ 124.044346][ T1457] veth1: left promiscuous mode [ 124.044851][ T1457] br1: port 1(veth1) entered disabled state [ 124.050400][ T1457] [ 124.050575][ T1457] ============================================ [ 124.050893][ T1457] WARNING: possible recursive locking detected [ 124.051213][ T1457] 6.13.0-rc5-virtme #1 Not tainted [ 124.051469][ T1457] -------------------------------------------- [ 124.051872][ T1457] ip/1457 is trying to acquire lock: [ 124.052132][ T1457] ffffffff937d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 124.052642][ T1457] [ 124.052642][ T1457] but task is already holding lock: [ 124.053013][ T1457] ffffffff937d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 124.053516][ T1457] [ 124.053516][ T1457] other info that might help us debug this: [ 124.053883][ T1457] Possible unsafe locking scenario: [ 124.053883][ T1457] [ 124.054246][ T1457] CPU0 [ 124.054430][ T1457] ---- [ 124.054615][ T1457] lock((netdev_chain).rwsem); [ 124.054864][ T1457] lock((netdev_chain).rwsem); [ 124.055120][ T1457] [ 124.055120][ T1457] *** DEADLOCK *** [ 124.055120][ T1457] [ 124.055480][ T1457] May be due to missing lock nesting notation [ 124.055480][ T1457] [ 124.055840][ T1457] 2 locks held by ip/1457: [ 124.056088][ T1457] #0: ffffffff937e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 124.056537][ T1457] #1: ffffffff937d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 124.057049][ T1457] [ 124.057049][ T1457] stack backtrace: [ 124.057356][ T1457] CPU: 0 UID: 0 PID: 1457 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 124.057733][ T1457] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 124.058042][ T1457] Call Trace: [ 124.058234][ T1457] [ 124.058379][ T1457] dump_stack_lvl+0x82/0xd0 [ 124.058646][ T1457] print_deadlock_bug+0x40a/0x650 [ 124.058898][ T1457] validate_chain+0x5bf/0xae0 [ 124.059153][ T1457] ? __pfx_validate_chain+0x10/0x10 [ 124.059408][ T1457] ? hlock_class+0x4e/0x130 [ 124.059658][ T1457] ? mark_lock+0x38/0x3e0 [ 124.059852][ T1457] __lock_acquire+0xb9a/0x1680 [ 124.060108][ T1457] lock_acquire.part.0+0xeb/0x330 [ 124.060362][ T1457] ? blocking_notifier_call_chain+0x50/0x90 [ 124.060681][ T1457] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 124.060930][ T1457] ? trace_lock_acquire+0x14c/0x1f0 [ 124.061181][ T1457] ? lock_acquire+0x32/0xc0 [ 124.061431][ T1457] ? blocking_notifier_call_chain+0x50/0x90 [ 124.061744][ T1457] down_read+0x9f/0x340 [ 124.061936][ T1457] ? blocking_notifier_call_chain+0x50/0x90 [ 124.062258][ T1457] ? __pfx_down_read+0x10/0x10 [ 124.062514][ T1457] blocking_notifier_call_chain+0x50/0x90 [ 124.062765][ T1457] netdev_update_features+0xb0/0xc0 [ 124.063017][ T1457] ? __pfx_netdev_update_features+0x10/0x10 [ 124.063330][ T1457] vlan_device_event+0x1153/0x2130 [8021q] [ 124.063651][ T1457] ? net_generic+0xbb/0x1f0 [vxlan] [ 124.063931][ T1457] ? __pfx_vlan_device_event+0x10/0x10 [8021q] [ 124.064257][ T1457] ? __pfx_vxlan_netdevice_event+0x10/0x10 [vxlan] [ 124.064590][ T1457] ? packet_notifier+0x3b0/0x810 [ 124.064845][ T1457] notifier_call_chain+0xcd/0x150 [ 124.065098][ T1457] blocking_notifier_call_chain+0x66/0x90 [ 124.065351][ T1457] netdev_update_features+0xb0/0xc0 [ 124.065601][ T1457] ? __pfx_netdev_update_features+0x10/0x10 [ 124.065919][ T1457] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 124.066231][ T1457] ? br_del_if+0xd4/0x1f0 [bridge] [ 124.066560][ T1457] br_del_if+0x100/0x1f0 [bridge] [ 124.066875][ T1457] ? rtnl_is_locked+0x15/0x20 [ 124.067129][ T1457] do_set_master+0xb5/0x1c0 [ 124.067381][ T1457] do_setlink.constprop.0+0x80e/0x2300 [ 124.067638][ T1457] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 124.067958][ T1457] ? lock_acquire.part.0+0xeb/0x330 [ 124.068208][ T1457] ? rtnl_newlink+0x653/0xa70 [ 124.068476][ T1457] ? rtnl_newlink+0xb9/0xa70 [ 124.068724][ T1457] ? rtnetlink_rcv_msg+0x712/0xc10 [ 124.068973][ T1457] ? __mutex_trylock_common+0xfa/0x260 [ 124.069226][ T1457] ? __pfx___mutex_trylock_common+0x10/0x10 [ 124.069540][ T1457] ? lock_acquire+0x32/0xc0 [ 124.069795][ T1457] ? trace_contention_end+0xef/0x150 [ 124.070044][ T1457] ? __mutex_lock+0x190/0xbc0 [ 124.070295][ T1457] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 124.070549][ T1457] ? rtnl_newlink+0x653/0xa70 [ 124.070799][ T1457] ? __pfx___mutex_lock+0x10/0x10 [ 124.071053][ T1457] ? __rtnl_newlink+0x3f2/0xa80 [ 124.071308][ T1457] rtnl_newlink+0x69c/0xa70 [ 124.071564][ T1457] ? __pfx_rtnl_newlink+0x10/0x10 [ 124.071821][ T1457] ? find_held_lock+0x2c/0x110 [ 124.072073][ T1457] ? __pfx___lock_release+0x10/0x10 [ 124.072323][ T1457] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 124.072585][ T1457] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 124.072863][ T1457] ? __pfx_rtnl_newlink+0x10/0x10 [ 124.073119][ T1457] rtnetlink_rcv_msg+0x712/0xc10 [ 124.073377][ T1457] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 124.073640][ T1457] ? hlock_class+0x4e/0x130 [ 124.073891][ T1457] ? mark_lock+0x38/0x3e0 [ 124.074088][ T1457] ? __lock_acquire+0xb9a/0x1680 [ 124.074344][ T1457] netlink_rcv_skb+0x130/0x360 [ 124.074601][ T1457] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 124.074856][ T1457] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 124.075121][ T1457] ? netlink_deliver_tap+0x13e/0x340 [ 124.075385][ T1457] ? netlink_deliver_tap+0xc3/0x340 [ 124.075643][ T1457] netlink_unicast+0x44b/0x710 [ 124.075898][ T1457] ? __pfx_netlink_unicast+0x10/0x10 [ 124.076153][ T1457] ? find_held_lock+0x2c/0x110 [ 124.076413][ T1457] netlink_sendmsg+0x723/0xbe0 [ 124.076674][ T1457] ? __pfx_netlink_sendmsg+0x10/0x10 [ 124.076895][ T1457] ____sys_sendmsg+0x7ac/0xa10 [ 124.077109][ T1457] ? __pfx_____sys_sendmsg+0x10/0x10 [ 124.077277][ T1457] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 124.077481][ T1457] ___sys_sendmsg+0xee/0x170 [ 124.077639][ T1457] ? __pfx____sys_sendmsg+0x10/0x10 [ 124.077801][ T1457] ? kasan_save_stack+0x34/0x50 [ 124.077962][ T1457] ? kasan_save_stack+0x24/0x50 [ 124.078121][ T1457] ? __kasan_record_aux_stack+0x8e/0xa0 [ 124.078279][ T1457] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 124.078493][ T1457] ? __x64_sys_close+0x7c/0xd0 [ 124.078653][ T1457] ? do_syscall_64+0xc1/0x1d0 [ 124.078812][ T1457] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 124.079011][ T1457] ? __lock_acquire+0xb9a/0x1680 [ 124.079172][ T1457] ? find_held_lock+0x2c/0x110 [ 124.079333][ T1457] ? __lock_release+0x103/0x460 [ 124.079491][ T1457] ? __virt_addr_valid+0x22b/0x430 [ 124.079656][ T1457] ? __pfx___lock_release+0x10/0x10 [ 124.079817][ T1457] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 124.079978][ T1457] __sys_sendmsg+0x109/0x1a0 [ 124.080136][ T1457] ? __pfx___sys_sendmsg+0x10/0x10 [ 124.080296][ T1457] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 124.080500][ T1457] do_syscall_64+0xc1/0x1d0 [ 124.080657][ T1457] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 124.080857][ T1457] RIP: 0033:0x7f8c460b19a7 [ 124.081023][ T1457] 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 [ 124.081580][ T1457] RSP: 002b:00007ffc1d0d9e48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 124.081826][ T1457] RAX: ffffffffffffffda RBX: 00007ffc1d0da570 RCX: 00007f8c460b19a7 [ 124.082065][ T1457] RDX: 0000000000000000 RSI: 00007ffc1d0d9eb0 RDI: 0000000000000005 [ 124.082306][ T1457] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 124.082547][ T1457] R10: 00007f8c45f6fef8 R11: 0000000000000246 R12: 0000000000000003 [ 124.082786][ T1457] R13: 0000000067795487 R14: 0000000000498600 R15: 0000000000000000 [ 124.083033][ T1457] [ 126.186703][ T1459] br1: port 1(veth1) entered blocking state [ 126.186933][ T1459] br1: port 1(veth1) entered disabled state [ 126.187183][ T1459] veth1: entered allmulticast mode [ 126.189632][ T1459] veth1: entered promiscuous mode [ 126.197938][ T1459] br1: port 1(veth1) entered blocking state [ 126.198198][ T1459] br1: port 1(veth1) entered forwarding state [ 126.262396][ T1460] br1: port 2(veth2) entered blocking state [ 126.262685][ T1460] br1: port 2(veth2) entered disabled state [ 126.262920][ T1460] veth2: entered allmulticast mode [ 126.264434][ T1460] veth2: entered promiscuous mode [ 126.265055][ T1460] br1: port 2(veth2) entered blocking state [ 126.265276][ T1460] br1: port 2(veth2) entered forwarding state [ 129.431273][ T1505] br1: port 2(veth2) entered disabled state [ 129.431737][ T1505] veth2: left allmulticast mode [ 129.431896][ T1505] veth2: left promiscuous mode [ 129.432164][ T1505] br1: port 2(veth2) entered disabled state [ 129.492573][ T1506] br1: port 1(veth1) entered disabled state [ 129.493125][ T1506] veth1: left allmulticast mode [ 129.493321][ T1506] veth1: left promiscuous mode [ 129.493604][ T1506] br1: port 1(veth1) entered disabled state