[ 10.941007][ T250] ip (250) used greatest stack depth: 24120 bytes left [ 12.780041][ T287] 8021q: 802.1Q VLAN Support v1.8 [ 14.985758][ T317] br1: port 1(veth1) entered blocking state [ 14.986232][ T317] br1: port 1(veth1) entered disabled state [ 14.986611][ T317] veth1: entered allmulticast mode [ 14.988691][ T317] veth1: entered promiscuous mode [ 15.081549][ T318] br1: port 2(veth2) entered blocking state [ 15.081871][ T318] br1: port 2(veth2) entered disabled state [ 15.082176][ T318] veth2: entered allmulticast mode [ 15.084082][ T318] veth2: entered promiscuous mode [ 15.162800][ T66] br1: port 1(veth1) entered blocking state [ 15.163199][ T66] br1: port 1(veth1) entered forwarding state [ 15.248362][ T39] br1: port 2(veth2) entered blocking state [ 15.248663][ T39] br1: port 2(veth2) entered forwarding state [ 24.691528][ T381] veth2: left allmulticast mode [ 24.691789][ T381] veth2: left promiscuous mode [ 24.692127][ T381] br1: port 2(veth2) entered disabled state [ 24.759337][ T382] veth1: left allmulticast mode [ 24.759646][ T382] veth1: left promiscuous mode [ 24.760087][ T382] br1: port 1(veth1) entered disabled state [ 24.764280][ T382] [ 24.764411][ T382] ============================================ [ 24.764716][ T382] WARNING: possible recursive locking detected [ 24.765025][ T382] 6.13.0-rc5-virtme #1 Not tainted [ 24.765279][ T382] -------------------------------------------- [ 24.765585][ T382] ip/382 is trying to acquire lock: [ 24.765832][ T382] ffffffffa21d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.766350][ T382] [ 24.766350][ T382] but task is already holding lock: [ 24.766719][ T382] ffffffffa21d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.767231][ T382] [ 24.767231][ T382] other info that might help us debug this: [ 24.767597][ T382] Possible unsafe locking scenario: [ 24.767597][ T382] [ 24.767976][ T382] CPU0 [ 24.768166][ T382] ---- [ 24.768352][ T382] lock((netdev_chain).rwsem); [ 24.768604][ T382] lock((netdev_chain).rwsem); [ 24.768853][ T382] [ 24.768853][ T382] *** DEADLOCK *** [ 24.768853][ T382] [ 24.769216][ T382] May be due to missing lock nesting notation [ 24.769216][ T382] [ 24.769598][ T382] 2 locks held by ip/382: [ 24.769788][ T382] #0: ffffffffa21e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 24.770246][ T382] #1: ffffffffa21d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.770756][ T382] [ 24.770756][ T382] stack backtrace: [ 24.771064][ T382] CPU: 3 UID: 0 PID: 382 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 24.771463][ T382] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.771779][ T382] Call Trace: [ 24.771972][ T382] [ 24.772105][ T382] dump_stack_lvl+0x82/0xd0 [ 24.772365][ T382] print_deadlock_bug+0x40a/0x650 [ 24.772624][ T382] validate_chain+0x5bf/0xae0 [ 24.772879][ T382] ? __pfx_validate_chain+0x10/0x10 [ 24.773135][ T382] ? hlock_class+0x4e/0x130 [ 24.773384][ T382] ? mark_lock+0x38/0x3e0 [ 24.773582][ T382] __lock_acquire+0xb9a/0x1680 [ 24.773840][ T382] lock_acquire.part.0+0xeb/0x330 [ 24.774091][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.774407][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.774662][ T382] ? trace_lock_acquire+0x14c/0x1f0 [ 24.774919][ T382] ? lock_acquire+0x32/0xc0 [ 24.775175][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.775493][ T382] down_read+0x9f/0x340 [ 24.775687][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.776002][ T382] ? __pfx_down_read+0x10/0x10 [ 24.776259][ T382] blocking_notifier_call_chain+0x50/0x90 [ 24.776514][ T382] netdev_update_features+0xb0/0xc0 [ 24.776768][ T382] ? __pfx_netdev_update_features+0x10/0x10 [ 24.777095][ T382] vlan_device_event+0x1153/0x2130 [8021q] [ 24.777422][ T382] ? __pfx_vlan_device_event+0x10/0x10 [8021q] [ 24.777742][ T382] ? packet_notifier+0x3b0/0x810 [ 24.777999][ T382] notifier_call_chain+0xcd/0x150 [ 24.778254][ T382] blocking_notifier_call_chain+0x66/0x90 [ 24.778509][ T382] netdev_update_features+0xb0/0xc0 [ 24.778769][ T382] ? __pfx_netdev_update_features+0x10/0x10 [ 24.779081][ T382] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 24.779395][ T382] ? br_del_if+0xd4/0x1f0 [bridge] [ 24.779708][ T382] br_del_if+0x100/0x1f0 [bridge] [ 24.780015][ T382] ? rtnl_is_locked+0x15/0x20 [ 24.780270][ T382] do_set_master+0xb5/0x1c0 [ 24.780527][ T382] do_setlink.constprop.0+0x80e/0x2300 [ 24.780787][ T382] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 24.781104][ T382] ? lock_acquire.part.0+0xeb/0x330 [ 24.781350][ T382] ? rtnl_newlink+0x653/0xa70 [ 24.781612][ T382] ? rtnl_newlink+0xb9/0xa70 [ 24.781862][ T382] ? rtnetlink_rcv_msg+0x712/0xc10 [ 24.782113][ T382] ? __mutex_trylock_common+0xfa/0x260 [ 24.782371][ T382] ? __pfx___mutex_trylock_common+0x10/0x10 [ 24.782694][ T382] ? lock_acquire+0x32/0xc0 [ 24.782946][ T382] ? trace_contention_end+0xef/0x150 [ 24.783200][ T382] ? __mutex_lock+0x190/0xbc0 [ 24.783453][ T382] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 24.783704][ T382] ? rtnl_newlink+0x653/0xa70 [ 24.783956][ T382] ? __pfx___mutex_lock+0x10/0x10 [ 24.784207][ T382] ? __rtnl_newlink+0x3f2/0xa80 [ 24.784461][ T382] rtnl_newlink+0x69c/0xa70 [ 24.784722][ T382] ? __pfx_rtnl_newlink+0x10/0x10 [ 24.784974][ T382] ? find_held_lock+0x2c/0x110 [ 24.785226][ T382] ? __pfx___lock_release+0x10/0x10 [ 24.785477][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.785731][ T382] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 24.785980][ T382] ? __pfx_rtnl_newlink+0x10/0x10 [ 24.786228][ T382] rtnetlink_rcv_msg+0x712/0xc10 [ 24.786481][ T382] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 24.786728][ T382] ? hlock_class+0x4e/0x130 [ 24.786977][ T382] ? mark_lock+0x38/0x3e0 [ 24.787171][ T382] ? __lock_acquire+0xb9a/0x1680 [ 24.787423][ T382] netlink_rcv_skb+0x130/0x360 [ 24.787675][ T382] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 24.787924][ T382] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 24.788188][ T382] ? netlink_deliver_tap+0x13e/0x340 [ 24.788439][ T382] ? netlink_deliver_tap+0xc3/0x340 [ 24.788689][ T382] netlink_unicast+0x44b/0x710 [ 24.788940][ T382] ? __pfx_netlink_unicast+0x10/0x10 [ 24.789188][ T382] ? find_held_lock+0x2c/0x110 [ 24.789436][ T382] netlink_sendmsg+0x723/0xbe0 [ 24.789687][ T382] ? __pfx_netlink_sendmsg+0x10/0x10 [ 24.789947][ T382] ____sys_sendmsg+0x7ac/0xa10 [ 24.790199][ T382] ? __pfx_____sys_sendmsg+0x10/0x10 [ 24.790446][ T382] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 24.790762][ T382] ___sys_sendmsg+0xee/0x170 [ 24.791015][ T382] ? __pfx____sys_sendmsg+0x10/0x10 [ 24.791269][ T382] ? kasan_save_stack+0x34/0x50 [ 24.791532][ T382] ? kasan_save_stack+0x24/0x50 [ 24.791785][ T382] ? __kasan_record_aux_stack+0x8e/0xa0 [ 24.792045][ T382] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 24.792359][ T382] ? __x64_sys_close+0x7c/0xd0 [ 24.792612][ T382] ? do_syscall_64+0xc1/0x1d0 [ 24.792864][ T382] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.793179][ T382] ? __lock_acquire+0xb9a/0x1680 [ 24.793431][ T382] ? find_held_lock+0x2c/0x110 [ 24.793686][ T382] ? __lock_release+0x103/0x460 [ 24.793946][ T382] ? __virt_addr_valid+0x22b/0x430 [ 24.794202][ T382] ? __pfx___lock_release+0x10/0x10 [ 24.794452][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.794705][ T382] __sys_sendmsg+0x109/0x1a0 [ 24.794959][ T382] ? __pfx___sys_sendmsg+0x10/0x10 [ 24.795212][ T382] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 24.795537][ T382] do_syscall_64+0xc1/0x1d0 [ 24.795795][ T382] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.796109][ T382] RIP: 0033:0x7fe6ac0879a7 [ 24.796374][ T382] 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 [ 24.797258][ T382] RSP: 002b:00007ffeba1bd588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 24.797653][ T382] RAX: ffffffffffffffda RBX: 00007ffeba1bdcb0 RCX: 00007fe6ac0879a7 [ 24.798032][ T382] RDX: 0000000000000000 RSI: 00007ffeba1bd5f0 RDI: 0000000000000005 [ 24.798411][ T382] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 24.798787][ T382] R10: 00007fe6abf45ef8 R11: 0000000000000246 R12: 0000000000000003 [ 24.799175][ T382] R13: 00000000677904c2 R14: 0000000000498600 R15: 0000000000000000 [ 24.799564][ T382] [ 24.817087][ T382] ip (382) used greatest stack depth: 23752 bytes left [ 26.917678][ T384] br1: port 1(veth1) entered blocking state [ 26.917947][ T384] br1: port 1(veth1) entered disabled state [ 26.918179][ T384] veth1: entered allmulticast mode [ 26.919630][ T384] veth1: entered promiscuous mode [ 26.921076][ T384] br1: port 1(veth1) entered blocking state [ 26.921302][ T384] br1: port 1(veth1) entered forwarding state [ 26.978016][ T385] br1: port 2(veth2) entered blocking state [ 26.978826][ T385] br1: port 2(veth2) entered disabled state [ 26.979037][ T385] veth2: entered allmulticast mode [ 26.980486][ T385] veth2: entered promiscuous mode [ 26.981074][ T385] br1: port 2(veth2) entered blocking state [ 26.981268][ T385] br1: port 2(veth2) entered forwarding state [ 30.055995][ T430] br1: port 2(veth2) entered disabled state [ 30.056443][ T430] veth2: left allmulticast mode [ 30.056605][ T430] veth2: left promiscuous mode [ 30.056869][ T430] br1: port 2(veth2) entered disabled state [ 30.132617][ T431] br1: port 1(veth1) entered disabled state [ 30.133298][ T431] veth1: left allmulticast mode [ 30.133565][ T431] veth1: left promiscuous mode [ 30.133972][ T431] br1: port 1(veth1) entered disabled state