[ 10.665039][ T251] ip (251) used greatest stack depth: 23248 bytes left [ 12.572380][ T288] 8021q: 802.1Q VLAN Support v1.8 [ 14.815119][ T318] br1: port 1(veth1) entered blocking state [ 14.815561][ T318] br1: port 1(veth1) entered disabled state [ 14.815932][ T318] veth1: entered allmulticast mode [ 14.818363][ T318] veth1: entered promiscuous mode [ 14.908867][ T319] br1: port 2(veth2) entered blocking state [ 14.909245][ T319] br1: port 2(veth2) entered disabled state [ 14.909903][ T319] veth2: entered allmulticast mode [ 14.911870][ T319] veth2: entered promiscuous mode [ 14.991431][ T37] br1: port 1(veth1) entered blocking state [ 14.991798][ T37] br1: port 1(veth1) entered forwarding state [ 15.072056][ T37] br1: port 2(veth2) entered blocking state [ 15.072461][ T37] br1: port 2(veth2) entered forwarding state [ 24.694174][ T381] veth2: left allmulticast mode [ 24.694476][ T381] veth2: left promiscuous mode [ 24.694842][ T381] br1: port 2(veth2) entered disabled state [ 24.778374][ T382] veth1: left allmulticast mode [ 24.778637][ T382] veth1: left promiscuous mode [ 24.778979][ T382] br1: port 1(veth1) entered disabled state [ 24.782942][ T382] [ 24.783079][ T382] ============================================ [ 24.783298][ T382] WARNING: possible recursive locking detected [ 24.783508][ T382] 6.13.0-rc5-virtme #1 Not tainted [ 24.783687][ T382] -------------------------------------------- [ 24.783914][ T382] ip/382 is trying to acquire lock: [ 24.784084][ T382] ffffffffb85d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.784444][ T382] [ 24.784444][ T382] but task is already holding lock: [ 24.784702][ T382] ffffffffb85d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.785046][ T382] [ 24.785046][ T382] other info that might help us debug this: [ 24.785296][ T382] Possible unsafe locking scenario: [ 24.785296][ T382] [ 24.785538][ T382] CPU0 [ 24.785663][ T382] ---- [ 24.785803][ T382] lock((netdev_chain).rwsem); [ 24.785972][ T382] lock((netdev_chain).rwsem); [ 24.786143][ T382] [ 24.786143][ T382] *** DEADLOCK *** [ 24.786143][ T382] [ 24.786395][ T382] May be due to missing lock nesting notation [ 24.786395][ T382] [ 24.786643][ T382] 2 locks held by ip/382: [ 24.786774][ T382] #0: ffffffffb85e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 24.787073][ T382] #1: ffffffffb85d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 24.787415][ T382] [ 24.787415][ T382] stack backtrace: [ 24.787622][ T382] CPU: 0 UID: 0 PID: 382 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 24.787888][ T382] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.788094][ T382] Call Trace: [ 24.788222][ T382] [ 24.788311][ T382] dump_stack_lvl+0x82/0xd0 [ 24.788493][ T382] print_deadlock_bug+0x40a/0x650 [ 24.788663][ T382] validate_chain+0x5bf/0xae0 [ 24.788832][ T382] ? __pfx_validate_chain+0x10/0x10 [ 24.789012][ T382] ? hlock_class+0x4e/0x130 [ 24.789179][ T382] ? mark_lock+0x38/0x3e0 [ 24.789327][ T382] __lock_acquire+0xb9a/0x1680 [ 24.789497][ T382] ? __kvm_read_guest_page+0xf7/0x1e0 [ 24.789670][ T382] lock_acquire.part.0+0xeb/0x330 [ 24.789851][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.790067][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.790233][ T382] ? trace_lock_acquire+0x14c/0x1f0 [ 24.790400][ T382] ? lock_acquire+0x32/0xc0 [ 24.790567][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.790785][ T382] down_read+0x9f/0x340 [ 24.790920][ T382] ? blocking_notifier_call_chain+0x50/0x90 [ 24.791136][ T382] ? __pfx_down_read+0x10/0x10 [ 24.791307][ T382] blocking_notifier_call_chain+0x50/0x90 [ 24.791479][ T382] netdev_update_features+0xb0/0xc0 [ 24.791657][ T382] ? __pfx_netdev_update_features+0x10/0x10 [ 24.791868][ T382] vlan_device_event+0x1153/0x2130 [8021q] [ 24.792087][ T382] ? __pfx_vlan_device_event+0x10/0x10 [8021q] [ 24.792313][ T382] ? packet_notifier+0x3b0/0x810 [ 24.792486][ T382] notifier_call_chain+0xcd/0x150 [ 24.792654][ T382] blocking_notifier_call_chain+0x66/0x90 [ 24.792823][ T382] netdev_update_features+0xb0/0xc0 [ 24.792991][ T382] ? __pfx_netdev_update_features+0x10/0x10 [ 24.793211][ T382] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 24.793425][ T382] ? br_del_if+0xd4/0x1f0 [bridge] [ 24.793646][ T382] br_del_if+0x100/0x1f0 [bridge] [ 24.793858][ T382] ? rtnl_is_locked+0x15/0x20 [ 24.794039][ T382] do_set_master+0xb5/0x1c0 [ 24.794209][ T382] do_setlink.constprop.0+0x80e/0x2300 [ 24.794392][ T382] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 24.794602][ T382] ? lock_acquire.part.0+0xeb/0x330 [ 24.794778][ T382] ? rtnl_newlink+0x653/0xa70 [ 24.794953][ T382] ? rtnl_newlink+0xb9/0xa70 [ 24.795124][ T382] ? rtnetlink_rcv_msg+0x712/0xc10 [ 24.795306][ T382] ? __mutex_trylock_common+0xfa/0x260 [ 24.795481][ T382] ? __pfx___mutex_trylock_common+0x10/0x10 [ 24.795704][ T382] ? lock_acquire+0x32/0xc0 [ 24.795873][ T382] ? trace_contention_end+0xef/0x150 [ 24.796043][ T382] ? __mutex_lock+0x190/0xbc0 [ 24.796226][ T382] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 24.796399][ T382] ? rtnl_newlink+0x653/0xa70 [ 24.796566][ T382] ? __pfx___mutex_lock+0x10/0x10 [ 24.796747][ T382] ? __rtnl_newlink+0x3f2/0xa80 [ 24.796933][ T382] rtnl_newlink+0x69c/0xa70 [ 24.797105][ T382] ? __pfx_rtnl_newlink+0x10/0x10 [ 24.797272][ T382] ? find_held_lock+0x2c/0x110 [ 24.797469][ T382] ? __pfx___lock_release+0x10/0x10 [ 24.797647][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.797828][ T382] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 24.797997][ T382] ? __pfx_rtnl_newlink+0x10/0x10 [ 24.798177][ T382] rtnetlink_rcv_msg+0x712/0xc10 [ 24.798347][ T382] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 24.798515][ T382] ? hlock_class+0x4e/0x130 [ 24.798682][ T382] ? mark_lock+0x38/0x3e0 [ 24.798813][ T382] ? __lock_acquire+0xb9a/0x1680 [ 24.798984][ T382] netlink_rcv_skb+0x130/0x360 [ 24.799156][ T382] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 24.799333][ T382] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 24.799505][ T382] ? netlink_deliver_tap+0x13e/0x340 [ 24.799678][ T382] ? netlink_deliver_tap+0xc3/0x340 [ 24.799851][ T382] netlink_unicast+0x44b/0x710 [ 24.800026][ T382] ? __pfx_netlink_unicast+0x10/0x10 [ 24.800196][ T382] ? find_held_lock+0x2c/0x110 [ 24.800369][ T382] netlink_sendmsg+0x723/0xbe0 [ 24.800539][ T382] ? __pfx_netlink_sendmsg+0x10/0x10 [ 24.800712][ T382] ____sys_sendmsg+0x7ac/0xa10 [ 24.800885][ T382] ? __pfx_____sys_sendmsg+0x10/0x10 [ 24.801053][ T382] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 24.801271][ T382] ___sys_sendmsg+0xee/0x170 [ 24.801443][ T382] ? __pfx____sys_sendmsg+0x10/0x10 [ 24.801612][ T382] ? kasan_save_stack+0x34/0x50 [ 24.801793][ T382] ? kasan_save_stack+0x24/0x50 [ 24.801960][ T382] ? __kasan_record_aux_stack+0x8e/0xa0 [ 24.802128][ T382] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 24.802342][ T382] ? __x64_sys_close+0x7c/0xd0 [ 24.802511][ T382] ? do_syscall_64+0xc1/0x1d0 [ 24.802690][ T382] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.802900][ T382] ? __lock_acquire+0xb9a/0x1680 [ 24.803070][ T382] ? find_held_lock+0x2c/0x110 [ 24.803238][ T382] ? __lock_release+0x103/0x460 [ 24.803402][ T382] ? __virt_addr_valid+0x22b/0x430 [ 24.803572][ T382] ? __pfx___lock_release+0x10/0x10 [ 24.803741][ T382] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.803922][ T382] __sys_sendmsg+0x109/0x1a0 [ 24.804089][ T382] ? __pfx___sys_sendmsg+0x10/0x10 [ 24.804259][ T382] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 24.804481][ T382] do_syscall_64+0xc1/0x1d0 [ 24.804649][ T382] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.804859][ T382] RIP: 0033:0x7fb2adc6a9a7 [ 24.805041][ 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 [ 24.805652][ T382] RSP: 002b:00007fff3e4247e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 24.805912][ T382] RAX: ffffffffffffffda RBX: 00007fff3e424f10 RCX: 00007fb2adc6a9a7 [ 24.806164][ T382] RDX: 0000000000000000 RSI: 00007fff3e424850 RDI: 0000000000000005 [ 24.806424][ T382] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078 [ 24.806678][ T382] R10: 00007fb2adb28ef8 R11: 0000000000000246 R12: 0000000000000003 [ 24.806932][ T382] R13: 0000000067795820 R14: 0000000000498600 R15: 0000000000000000 [ 24.807188][ T382] [ 26.918997][ T384] br1: port 1(veth1) entered blocking state [ 26.919242][ T384] br1: port 1(veth1) entered disabled state [ 26.919522][ T384] veth1: entered allmulticast mode [ 26.921032][ T384] veth1: entered promiscuous mode [ 26.931435][ T384] br1: port 1(veth1) entered blocking state [ 26.931695][ T384] br1: port 1(veth1) entered forwarding state [ 26.984213][ T386] br1: port 2(veth2) entered blocking state [ 26.984440][ T386] br1: port 2(veth2) entered disabled state [ 26.984657][ T386] veth2: entered allmulticast mode [ 26.986768][ T386] veth2: entered promiscuous mode [ 26.993705][ T386] br1: port 2(veth2) entered blocking state [ 26.994012][ T386] br1: port 2(veth2) entered forwarding state [ 30.067480][ T431] br1: port 2(veth2) entered disabled state [ 30.067906][ T431] veth2: left allmulticast mode [ 30.068068][ T431] veth2: left promiscuous mode [ 30.068351][ T431] br1: port 2(veth2) entered disabled state [ 30.138894][ T432] br1: port 1(veth1) entered disabled state [ 30.139366][ T432] veth1: left allmulticast mode [ 30.139529][ T432] veth1: left promiscuous mode [ 30.139796][ T432] br1: port 1(veth1) entered disabled state