[ 44.396783][ T750] 8021q: 802.1Q VLAN Support v1.8 [ 46.827536][ T780] br1: port 1(veth1) entered blocking state [ 46.827846][ T780] br1: port 1(veth1) entered disabled state [ 46.828153][ T780] veth1: entered allmulticast mode [ 46.830209][ T780] veth1: entered promiscuous mode [ 46.923001][ T781] br1: port 2(veth2) entered blocking state [ 46.923313][ T781] br1: port 2(veth2) entered disabled state [ 46.923627][ T781] veth2: entered allmulticast mode [ 46.925788][ T781] veth2: entered promiscuous mode [ 47.012421][ T151] br1: port 1(veth1) entered blocking state [ 47.012979][ T151] br1: port 1(veth1) entered forwarding state [ 47.106976][ T37] br1: port 2(veth2) entered blocking state [ 47.107334][ T37] br1: port 2(veth2) entered forwarding state [ 56.759471][ T843] veth2: left allmulticast mode [ 56.759715][ T843] veth2: left promiscuous mode [ 56.760043][ T843] br1: port 2(veth2) entered disabled state [ 56.842522][ T844] veth1: left allmulticast mode [ 56.842800][ T844] veth1: left promiscuous mode [ 56.843133][ T844] br1: port 1(veth1) entered disabled state [ 56.846783][ T844] [ 56.846882][ T844] ============================================ [ 56.847077][ T844] WARNING: possible recursive locking detected [ 56.847274][ T844] 6.13.0-rc5-virtme #1 Not tainted [ 56.847427][ T844] -------------------------------------------- [ 56.847609][ T844] ip/844 is trying to acquire lock: [ 56.847761][ T844] ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.848072][ T844] [ 56.848072][ T844] but task is already holding lock: [ 56.848293][ T844] ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.848598][ T844] [ 56.848598][ T844] other info that might help us debug this: [ 56.848823][ T844] Possible unsafe locking scenario: [ 56.848823][ T844] [ 56.849049][ T844] CPU0 [ 56.849165][ T844] ---- [ 56.849280][ T844] lock((netdev_chain).rwsem); [ 56.849433][ T844] lock((netdev_chain).rwsem); [ 56.849618][ T844] [ 56.849618][ T844] *** DEADLOCK *** [ 56.849618][ T844] [ 56.849843][ T844] May be due to missing lock nesting notation [ 56.849843][ T844] [ 56.850076][ T844] 2 locks held by ip/844: [ 56.850191][ T844] #0: ffffffffa57e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 56.850466][ T844] #1: ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 56.850775][ T844] [ 56.850775][ T844] stack backtrace: [ 56.850974][ T844] CPU: 2 UID: 0 PID: 844 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 56.851203][ T844] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 56.851395][ T844] Call Trace: [ 56.851512][ T844] [ 56.851593][ T844] dump_stack_lvl+0x82/0xd0 [ 56.851757][ T844] print_deadlock_bug+0x40a/0x650 [ 56.851912][ T844] validate_chain+0x5bf/0xae0 [ 56.852067][ T844] ? __pfx_validate_chain+0x10/0x10 [ 56.852223][ T844] ? hlock_class+0x4e/0x130 [ 56.852379][ T844] ? mark_lock+0x38/0x3e0 [ 56.852495][ T844] __lock_acquire+0xb9a/0x1680 [ 56.852650][ T844] lock_acquire.part.0+0xeb/0x330 [ 56.852803][ T844] ? blocking_notifier_call_chain+0x50/0x90 [ 56.852998][ T844] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.853148][ T844] ? trace_lock_acquire+0x14c/0x1f0 [ 56.853303][ T844] ? lock_acquire+0x32/0xc0 [ 56.853455][ T844] ? blocking_notifier_call_chain+0x50/0x90 [ 56.853642][ T844] down_read+0x9f/0x340 [ 56.853757][ T844] ? blocking_notifier_call_chain+0x50/0x90 [ 56.853944][ T844] ? __pfx_down_read+0x10/0x10 [ 56.854101][ T844] blocking_notifier_call_chain+0x50/0x90 [ 56.854250][ T844] netdev_update_features+0xb0/0xc0 [ 56.854405][ T844] ? __pfx_netdev_update_features+0x10/0x10 [ 56.854595][ T844] vlan_device_event+0x1153/0x2130 [8021q] [ 56.854787][ T844] ? __pfx_vlan_device_event+0x10/0x10 [8021q] [ 56.854976][ T844] ? packet_notifier+0x3b0/0x810 [ 56.855129][ T844] notifier_call_chain+0xcd/0x150 [ 56.855286][ T844] blocking_notifier_call_chain+0x66/0x90 [ 56.855435][ T844] netdev_update_features+0xb0/0xc0 [ 56.855584][ T844] ? __pfx_netdev_update_features+0x10/0x10 [ 56.855771][ T844] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 56.855957][ T844] ? br_del_if+0xd4/0x1f0 [bridge] [ 56.856156][ T844] br_del_if+0x100/0x1f0 [bridge] [ 56.856351][ T844] ? rtnl_is_locked+0x15/0x20 [ 56.856503][ T844] do_set_master+0xb5/0x1c0 [ 56.856655][ T844] do_setlink.constprop.0+0x80e/0x2300 [ 56.856807][ T844] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 56.856996][ T844] ? lock_acquire.part.0+0xeb/0x330 [ 56.857147][ T844] ? rtnl_newlink+0x653/0xa70 [ 56.857299][ T844] ? rtnl_newlink+0xb9/0xa70 [ 56.857450][ T844] ? rtnetlink_rcv_msg+0x712/0xc10 [ 56.857604][ T844] ? __mutex_trylock_common+0xfa/0x260 [ 56.857756][ T844] ? __pfx___mutex_trylock_common+0x10/0x10 [ 56.857942][ T844] ? lock_acquire+0x32/0xc0 [ 56.858092][ T844] ? trace_contention_end+0xef/0x150 [ 56.858243][ T844] ? __mutex_lock+0x190/0xbc0 [ 56.858397][ T844] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 56.858552][ T844] ? rtnl_newlink+0x653/0xa70 [ 56.858700][ T844] ? __pfx___mutex_lock+0x10/0x10 [ 56.858851][ T844] ? __rtnl_newlink+0x3f2/0xa80 [ 56.859002][ T844] rtnl_newlink+0x69c/0xa70 [ 56.859152][ T844] ? __pfx_rtnl_newlink+0x10/0x10 [ 56.859304][ T844] ? find_held_lock+0x2c/0x110 [ 56.859459][ T844] ? __pfx___lock_release+0x10/0x10 [ 56.859610][ T844] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.859769][ T844] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 56.859918][ T844] ? __pfx_rtnl_newlink+0x10/0x10 [ 56.860069][ T844] rtnetlink_rcv_msg+0x712/0xc10 [ 56.860219][ T844] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 56.860371][ T844] ? hlock_class+0x4e/0x130 [ 56.860518][ T844] ? mark_lock+0x38/0x3e0 [ 56.860635][ T844] ? __lock_acquire+0xb9a/0x1680 [ 56.860787][ T844] netlink_rcv_skb+0x130/0x360 [ 56.860954][ T844] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 56.861104][ T844] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 56.861259][ T844] ? netlink_deliver_tap+0x13e/0x340 [ 56.861416][ T844] ? netlink_deliver_tap+0xc3/0x340 [ 56.861566][ T844] netlink_unicast+0x44b/0x710 [ 56.861715][ T844] ? __pfx_netlink_unicast+0x10/0x10 [ 56.861874][ T844] ? find_held_lock+0x2c/0x110 [ 56.862026][ T844] netlink_sendmsg+0x723/0xbe0 [ 56.862176][ T844] ? __pfx_netlink_sendmsg+0x10/0x10 [ 56.862332][ T844] ____sys_sendmsg+0x7ac/0xa10 [ 56.862485][ T844] ? __pfx_____sys_sendmsg+0x10/0x10 [ 56.862634][ T844] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 56.862824][ T844] ___sys_sendmsg+0xee/0x170 [ 56.862974][ T844] ? __pfx____sys_sendmsg+0x10/0x10 [ 56.863132][ T844] ? kasan_save_stack+0x34/0x50 [ 56.863288][ T844] ? kasan_save_stack+0x24/0x50 [ 56.863436][ T844] ? __kasan_record_aux_stack+0x8e/0xa0 [ 56.863585][ T844] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 56.863777][ T844] ? __x64_sys_close+0x7c/0xd0 [ 56.863929][ T844] ? do_syscall_64+0xc1/0x1d0 [ 56.864080][ T844] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.864285][ T844] ? __lock_acquire+0xb9a/0x1680 [ 56.864438][ T844] ? find_held_lock+0x2c/0x110 [ 56.864587][ T844] ? __lock_release+0x103/0x460 [ 56.864736][ T844] ? __virt_addr_valid+0x22b/0x430 [ 56.864889][ T844] ? __pfx___lock_release+0x10/0x10 [ 56.865037][ T844] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.865188][ T844] __sys_sendmsg+0x109/0x1a0 [ 56.865350][ T844] ? __pfx___sys_sendmsg+0x10/0x10 [ 56.865501][ T844] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 56.865693][ T844] do_syscall_64+0xc1/0x1d0 [ 56.865844][ T844] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.866029][ T844] RIP: 0033:0x7f8678fe99a7 [ 56.866191][ T844] 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 [ 56.866731][ T844] RSP: 002b:00007fff99c827a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 56.866961][ T844] RAX: ffffffffffffffda RBX: 00007fff99c82ed0 RCX: 00007f8678fe99a7 [ 56.867187][ T844] RDX: 0000000000000000 RSI: 00007fff99c82810 RDI: 0000000000000005 [ 56.867421][ T844] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 56.867646][ T844] R10: 00007f8678ea7ef8 R11: 0000000000000246 R12: 0000000000000003 [ 56.867872][ T844] R13: 0000000067792bda R14: 0000000000498600 R15: 0000000000000000 [ 56.868102][ T844] [ 58.981703][ T846] br1: port 1(veth1) entered blocking state [ 58.981992][ T846] br1: port 1(veth1) entered disabled state [ 58.982229][ T846] veth1: entered allmulticast mode [ 58.983767][ T846] veth1: entered promiscuous mode [ 58.985305][ T846] br1: port 1(veth1) entered blocking state [ 58.985546][ T846] br1: port 1(veth1) entered forwarding state [ 59.053423][ T847] br1: port 2(veth2) entered blocking state [ 59.053675][ T847] br1: port 2(veth2) entered disabled state [ 59.053897][ T847] veth2: entered allmulticast mode [ 59.055500][ T847] veth2: entered promiscuous mode [ 59.056165][ T847] br1: port 2(veth2) entered blocking state [ 59.056363][ T847] br1: port 2(veth2) entered forwarding state [ 62.177938][ T892] br1: port 2(veth2) entered disabled state [ 62.178377][ T892] veth2: left allmulticast mode [ 62.178543][ T892] veth2: left promiscuous mode [ 62.178805][ T892] br1: port 2(veth2) entered disabled state [ 62.238169][ T893] br1: port 1(veth1) entered disabled state [ 62.238688][ T893] veth1: left allmulticast mode [ 62.238840][ T893] veth1: left promiscuous mode [ 62.239100][ T893] br1: port 1(veth1) entered disabled state