[ 12.110414][ T249] ip (249) used greatest stack depth: 22856 bytes left [ 17.889361][ T369] br: port 1(veth1) entered blocking state [ 17.889871][ T369] br: port 1(veth1) entered disabled state [ 17.891464][ T369] veth1: entered allmulticast mode [ 17.893655][ T369] veth1: entered promiscuous mode [ 17.896427][ T40] br: port 1(veth1) entered blocking state [ 17.896817][ T40] br: port 1(veth1) entered forwarding state [ 18.074810][ T374] br: port 2(veth3) entered blocking state [ 18.075125][ T374] br: port 2(veth3) entered disabled state [ 18.075396][ T374] veth3: entered allmulticast mode [ 18.077492][ T374] veth3: entered promiscuous mode [ 18.079058][ T44] br: port 2(veth3) entered blocking state [ 18.079350][ T44] br: port 2(veth3) entered forwarding state [ 18.185803][ T379] br: port 3(veth4) entered blocking state [ 18.186150][ T379] br: port 3(veth4) entered disabled state [ 18.186429][ T379] veth4: entered allmulticast mode [ 18.188371][ T379] veth4: entered promiscuous mode [ 18.189785][ T40] br: port 3(veth4) entered blocking state [ 18.190083][ T40] br: port 3(veth4) entered forwarding state [ 18.909752][ T403] [ 18.909892][ T403] ============================================ [ 18.910109][ T403] WARNING: possible recursive locking detected [ 18.910340][ T403] 6.13.0-rc5-virtme #1 Not tainted [ 18.910512][ T403] -------------------------------------------- [ 18.910725][ T403] ip/403 is trying to acquire lock: [ 18.910891][ T403] ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 18.911225][ T403] [ 18.911225][ T403] but task is already holding lock: [ 18.911466][ T403] ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 18.911780][ T403] [ 18.911780][ T403] other info that might help us debug this: [ 18.912008][ T403] Possible unsafe locking scenario: [ 18.912008][ T403] [ 18.912228][ T403] CPU0 [ 18.912347][ T403] ---- [ 18.912460][ T403] lock((netdev_chain).rwsem); [ 18.912630][ T403] lock((netdev_chain).rwsem); [ 18.912789][ T403] [ 18.912789][ T403] *** DEADLOCK *** [ 18.912789][ T403] [ 18.913064][ T403] May be due to missing lock nesting notation [ 18.913064][ T403] [ 18.913306][ T403] 2 locks held by ip/403: [ 18.913452][ T403] #0: ffffffff8c5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x653/0xa70 [ 18.913738][ T403] #1: ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 18.914064][ T403] [ 18.914064][ T403] stack backtrace: [ 18.914251][ T403] CPU: 2 UID: 0 PID: 403 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 18.914483][ T403] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.914674][ T403] Call Trace: [ 18.914815][ T403] [ 18.914897][ T403] dump_stack_lvl+0x82/0xd0 [ 18.915060][ T403] print_deadlock_bug+0x40a/0x650 [ 18.915219][ T403] validate_chain+0x5bf/0xae0 [ 18.915375][ T403] ? __pfx_validate_chain+0x10/0x10 [ 18.915530][ T403] ? hlock_class+0x4e/0x130 [ 18.915682][ T403] ? mark_lock+0x38/0x3e0 [ 18.915800][ T403] __lock_acquire+0xb9a/0x1680 [ 18.915959][ T403] ? rcu_read_lock_any_held+0x43/0xb0 [ 18.916122][ T403] lock_acquire.part.0+0xeb/0x330 [ 18.916277][ T403] ? blocking_notifier_call_chain+0x50/0x90 [ 18.916474][ T403] ? __pfx_validate_chain+0x10/0x10 [ 18.916627][ T403] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.916778][ T403] ? trace_lock_acquire+0x14c/0x1f0 [ 18.916937][ T403] ? lock_acquire+0x32/0xc0 [ 18.917093][ T403] ? blocking_notifier_call_chain+0x50/0x90 [ 18.917284][ T403] down_read+0x9f/0x340 [ 18.917401][ T403] ? blocking_notifier_call_chain+0x50/0x90 [ 18.917591][ T403] ? __pfx_down_read+0x10/0x10 [ 18.917744][ T403] ? find_held_lock+0x2c/0x110 [ 18.917899][ T403] blocking_notifier_call_chain+0x50/0x90 [ 18.918068][ T403] dev_set_mtu_ext+0x18c/0x510 [ 18.918227][ T403] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 18.918383][ T403] ? lockdep_hardirqs_on_prepare+0x12b/0x410 [ 18.918574][ T403] ? fib6_walk+0x28c/0x380 [ 18.918730][ T403] ? __local_bh_enable_ip+0xa6/0x120 [ 18.918887][ T403] ? __pfx_validate_chain+0x10/0x10 [ 18.919045][ T403] dev_set_mtu+0xa1/0x130 [ 18.919164][ T403] ? __pfx_dev_set_mtu+0x10/0x10 [ 18.919317][ T403] ? __lock_acquire+0xb9a/0x1680 [ 18.919474][ T403] ? __lock_release+0x103/0x460 [ 18.919625][ T403] ? packet_notifier+0x3a6/0x810 [ 18.919780][ T403] br_mtu_auto_adjust+0x189/0x270 [bridge] [ 18.920010][ T403] br_device_event+0x179/0x800 [bridge] [ 18.920191][ T403] ? __pfx_br_device_event+0x10/0x10 [bridge] [ 18.920405][ T403] ? packet_notifier+0x3b0/0x810 [ 18.920560][ T403] notifier_call_chain+0xcd/0x150 [ 18.920716][ T403] blocking_notifier_call_chain+0x66/0x90 [ 18.920870][ T403] dev_set_mtu_ext+0x2b6/0x510 [ 18.921026][ T403] ? __pfx_dev_set_mtu_ext+0x10/0x10 [ 18.921178][ T403] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 18.921369][ T403] ? __pfx_validate_chain+0x10/0x10 [ 18.921525][ T403] ? mark_lock+0x38/0x3e0 [ 18.921642][ T403] do_setlink.constprop.0+0x4b3/0x2300 [ 18.921803][ T403] ? __pfx_do_setlink.constprop.0+0x10/0x10 [ 18.921999][ T403] ? lock_acquire.part.0+0xeb/0x330 [ 18.922154][ T403] ? rtnl_newlink+0x653/0xa70 [ 18.922304][ T403] ? rtnl_newlink+0xb9/0xa70 [ 18.922455][ T403] ? rtnetlink_rcv_msg+0x712/0xc10 [ 18.922609][ T403] ? __mutex_trylock_common+0xfa/0x260 [ 18.922765][ T403] ? __pfx___mutex_trylock_common+0x10/0x10 [ 18.922961][ T403] ? lock_acquire+0x32/0xc0 [ 18.923113][ T403] ? trace_contention_end+0xef/0x150 [ 18.923267][ T403] ? __mutex_lock+0x190/0xbc0 [ 18.923419][ T403] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 18.923574][ T403] ? rtnl_newlink+0x653/0xa70 [ 18.923724][ T403] ? __pfx___mutex_lock+0x10/0x10 [ 18.923880][ T403] ? __rtnl_newlink+0x3f2/0xa80 [ 18.924061][ T403] rtnl_newlink+0x69c/0xa70 [ 18.924216][ T403] ? __pfx_rtnl_newlink+0x10/0x10 [ 18.924367][ T403] ? find_held_lock+0x2c/0x110 [ 18.924524][ T403] ? __pfx___lock_release+0x10/0x10 [ 18.924677][ T403] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.924833][ T403] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 18.924990][ T403] ? __pfx_rtnl_newlink+0x10/0x10 [ 18.925150][ T403] rtnetlink_rcv_msg+0x712/0xc10 [ 18.925304][ T403] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 18.925456][ T403] ? hlock_class+0x4e/0x130 [ 18.925607][ T403] ? mark_lock+0x38/0x3e0 [ 18.925723][ T403] ? __lock_acquire+0xb9a/0x1680 [ 18.925875][ T403] netlink_rcv_skb+0x130/0x360 [ 18.926033][ T403] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 18.926185][ T403] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 18.926343][ T403] ? netlink_deliver_tap+0x13e/0x340 [ 18.926501][ T403] ? netlink_deliver_tap+0xc3/0x340 [ 18.926654][ T403] netlink_unicast+0x44b/0x710 [ 18.926807][ T403] ? __pfx_netlink_unicast+0x10/0x10 [ 18.926967][ T403] ? find_held_lock+0x2c/0x110 [ 18.927126][ T403] netlink_sendmsg+0x723/0xbe0 [ 18.927280][ T403] ? __pfx_netlink_sendmsg+0x10/0x10 [ 18.927440][ T403] ____sys_sendmsg+0x7ac/0xa10 [ 18.927595][ T403] ? __pfx_____sys_sendmsg+0x10/0x10 [ 18.927754][ T403] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 18.927947][ T403] ___sys_sendmsg+0xee/0x170 [ 18.928102][ T403] ? __pfx____sys_sendmsg+0x10/0x10 [ 18.928257][ T403] ? kasan_save_stack+0x34/0x50 [ 18.928415][ T403] ? kasan_save_stack+0x24/0x50 [ 18.928568][ T403] ? __kasan_record_aux_stack+0x8e/0xa0 [ 18.928724][ T403] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 18.928916][ T403] ? __x64_sys_close+0x7c/0xd0 [ 18.929068][ T403] ? do_syscall_64+0xc1/0x1d0 [ 18.929232][ T403] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.929424][ T403] ? __lock_acquire+0xb9a/0x1680 [ 18.929581][ T403] ? find_held_lock+0x2c/0x110 [ 18.929734][ T403] ? __lock_release+0x103/0x460 [ 18.929885][ T403] ? __virt_addr_valid+0x22b/0x430 [ 18.930040][ T403] ? __pfx___lock_release+0x10/0x10 [ 18.930195][ T403] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.930349][ T403] __sys_sendmsg+0x109/0x1a0 [ 18.930506][ T403] ? __pfx___sys_sendmsg+0x10/0x10 [ 18.930660][ T403] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 18.930863][ T403] do_syscall_64+0xc1/0x1d0 [ 18.931015][ T403] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.931207][ T403] RIP: 0033:0x7fbe028bd9a7 [ 18.931370][ T403] 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 [ 18.931914][ T403] RSP: 002b:00007fffc5b138e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 18.932148][ T403] RAX: ffffffffffffffda RBX: 00007fffc5b14010 RCX: 00007fbe028bd9a7 [ 18.932381][ T403] RDX: 0000000000000000 RSI: 00007fffc5b13950 RDI: 0000000000000005 [ 18.932609][ T403] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078 [ 18.932838][ T403] R10: 00007fbe0277bef8 R11: 0000000000000246 R12: 0000000000000004 [ 18.933074][ T403] R13: 000000006779522b R14: 0000000000498600 R15: 0000000000000000 [ 18.933311][ T403] [ 105.997623][ T805] Mirror/redirect action on [ 139.905225][ T981] br: port 3(veth4) entered disabled state [ 139.905853][ T981] veth4: left allmulticast mode [ 139.906080][ T981] veth4: left promiscuous mode [ 139.906439][ T981] br: port 3(veth4) entered disabled state [ 140.002146][ T983] br: port 2(veth3) entered disabled state [ 140.002935][ T983] veth3: left allmulticast mode [ 140.003251][ T983] veth3: left promiscuous mode [ 140.003667][ T983] br: port 2(veth3) entered disabled state [ 140.078940][ T985] br: port 1(veth1) entered disabled state [ 140.079510][ T985] veth1: left allmulticast mode [ 140.079712][ T985] veth1: left promiscuous mode [ 140.080000][ T985] br: port 1(veth1) entered disabled state