[ 10.685632][ T249] ip (249) used greatest stack depth: 23424 bytes left [ 12.772971][ T292] 8021q: 802.1Q VLAN Support v1.8 [ 15.337979][ T328] br0: port 1(veth1) entered blocking state [ 15.338623][ T328] br0: port 1(veth1) entered disabled state [ 15.339481][ T328] veth1: entered allmulticast mode [ 15.342909][ T328] veth1: entered promiscuous mode [ 15.439461][ T45] br0: port 1(veth1) entered blocking state [ 15.440070][ T45] br0: port 1(veth1) entered forwarding state [ 15.604603][ T331] br0: port 2(veth2) entered blocking state [ 15.604897][ T331] br0: port 2(veth2) entered disabled state [ 15.605161][ T331] veth2: entered allmulticast mode [ 15.607537][ T331] veth2: entered promiscuous mode [ 15.699624][ T40] br0: port 2(veth2) entered blocking state [ 15.699949][ T40] br0: port 2(veth2) entered forwarding state [ 85.081475][ T2114] br0: port 2(veth2) entered disabled state [ 85.163493][ T2115] veth2: left allmulticast mode [ 85.165063][ T2115] veth2: left promiscuous mode [ 85.165473][ T2115] br0: port 2(veth2) entered disabled state [ 85.257102][ T2116] br0: port 1(veth1) entered disabled state [ 85.342371][ T2117] veth1: left allmulticast mode [ 85.342630][ T2117] veth1: left promiscuous mode [ 85.342973][ T2117] br0: port 1(veth1) entered disabled state [ 86.122983][ T2135] br0: port 1(veth1) entered blocking state [ 86.123497][ T2135] br0: port 1(veth1) entered disabled state [ 86.123958][ T2135] veth1: entered allmulticast mode [ 86.127269][ T2135] veth1: entered promiscuous mode [ 86.206427][ T45] br0: port 1(veth1) entered blocking state [ 86.206744][ T45] br0: port 1(veth1) entered forwarding state [ 86.505377][ T2140] br0: port 2(veth2) entered blocking state [ 86.505764][ T2140] br0: port 2(veth2) entered disabled state [ 86.506049][ T2140] veth2: entered allmulticast mode [ 86.507968][ T2140] veth2: entered promiscuous mode [ 86.594440][ T45] br0: port 2(veth2) entered blocking state [ 86.594745][ T45] br0: port 2(veth2) entered forwarding state [ 155.485922][ T3932] br0: port 2(veth2) entered disabled state [ 155.549202][ T3934] veth2: left allmulticast mode [ 155.549438][ T3934] veth2: left promiscuous mode [ 155.550079][ T3934] br0: port 2(veth2) entered disabled state [ 155.631284][ T3935] br0: port 1(veth1) entered disabled state [ 155.746285][ T3936] veth1: left allmulticast mode [ 155.746628][ T3936] veth1: left promiscuous mode [ 155.747145][ T3936] br0: port 1(veth1) entered disabled state [ 156.490605][ T3954] br0: port 1(veth1) entered blocking state [ 156.490927][ T3954] br0: port 1(veth1) entered disabled state [ 156.491213][ T3954] veth1: entered allmulticast mode [ 156.493200][ T3954] veth1: entered promiscuous mode [ 156.568550][ T45] br0: port 1(veth1) entered blocking state [ 156.568879][ T45] br0: port 1(veth1) entered forwarding state [ 156.862531][ T3959] br0: port 2(veth2) entered blocking state [ 156.862846][ T3959] br0: port 2(veth2) entered disabled state [ 156.863124][ T3959] veth2: entered allmulticast mode [ 156.865014][ T3959] veth2: entered promiscuous mode [ 156.950456][ T39] br0: port 2(veth2) entered blocking state [ 156.950768][ T39] br0: port 2(veth2) entered forwarding state [ 300.454192][ T7808] br0: port 2(veth2) entered disabled state [ 300.543986][ T7809] veth2: left allmulticast mode [ 300.544404][ T7809] veth2: left promiscuous mode [ 300.544997][ T7809] br0: port 2(veth2) entered disabled state [ 300.639302][ T7810] br0: port 1(veth1) entered disabled state [ 300.715471][ T7811] veth1: left allmulticast mode [ 300.715706][ T7811] veth1: left promiscuous mode [ 300.716050][ T7811] br0: port 1(veth1) entered disabled state [ 301.777916][ T7832] [ 301.778108][ T7832] ============================================ [ 301.778302][ T7832] WARNING: possible recursive locking detected [ 301.778485][ T7832] 6.13.0-rc5-virtme #1 Not tainted [ 301.778641][ T7832] -------------------------------------------- [ 301.778824][ T7832] ip/7832 is trying to acquire lock: [ 301.778971][ T7832] ffffffff859d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 301.779284][ T7832] [ 301.779284][ T7832] but task is already holding lock: [ 301.779523][ T7832] ffffffff859d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 301.779827][ T7832] [ 301.779827][ T7832] other info that might help us debug this: [ 301.780049][ T7832] Possible unsafe locking scenario: [ 301.780049][ T7832] [ 301.780264][ T7832] CPU0 [ 301.780378][ T7832] ---- [ 301.780499][ T7832] lock((netdev_chain).rwsem); [ 301.780651][ T7832] lock((netdev_chain).rwsem); [ 301.780802][ T7832] [ 301.780802][ T7832] *** DEADLOCK *** [ 301.780802][ T7832] [ 301.781023][ T7832] May be due to missing lock nesting notation [ 301.781023][ T7832] [ 301.781242][ T7832] 2 locks held by ip/7832: [ 301.781390][ T7832] #0: ffffffff859e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 301.781672][ T7832] #1: ffffffff859d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 301.781981][ T7832] [ 301.781981][ T7832] stack backtrace: [ 301.782171][ T7832] CPU: 0 UID: 0 PID: 7832 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 301.782410][ T7832] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 301.782610][ T7832] Call Trace: [ 301.782727][ T7832] [ 301.782806][ T7832] dump_stack_lvl+0x82/0xd0 [ 301.782972][ T7832] print_deadlock_bug+0x40a/0x650 [ 301.783122][ T7832] validate_chain+0x5bf/0xae0 [ 301.783284][ T7832] ? __pfx_validate_chain+0x10/0x10 [ 301.783447][ T7832] ? hlock_class+0x4e/0x130 [ 301.783595][ T7832] ? mark_lock+0x38/0x3e0 [ 301.783719][ T7832] __lock_acquire+0xb9a/0x1680 [ 301.783870][ T7832] lock_acquire.part.0+0xeb/0x330 [ 301.784019][ T7832] ? blocking_notifier_call_chain+0x50/0x90 [ 301.784208][ T7832] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 301.784405][ T7832] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 301.784559][ T7832] ? trace_lock_acquire+0x14c/0x1f0 [ 301.784709][ T7832] ? lock_acquire+0x32/0xc0 [ 301.784866][ T7832] ? blocking_notifier_call_chain+0x50/0x90 [ 301.785060][ T7832] down_read+0x9f/0x340 [ 301.785176][ T7832] ? blocking_notifier_call_chain+0x50/0x90 [ 301.785374][ T7832] ? __pfx_down_read+0x10/0x10 [ 301.785533][ T7832] ? __lock_release+0x103/0x460 [ 301.785694][ T7832] ? netconsole_netdev_event+0x2c1/0x620 [ 301.785852][ T7832] ? __pfx___lock_release+0x10/0x10 [ 301.786006][ T7832] blocking_notifier_call_chain+0x50/0x90 [ 301.786166][ T7832] __netdev_upper_dev_unlink+0xd9/0x220 [ 301.786323][ T7832] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 301.786518][ T7832] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 301.786672][ T7832] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 301.786856][ T7832] ? rtnl_is_locked+0x15/0x20 [ 301.787009][ T7832] netdev_upper_dev_unlink+0x71/0xa0 [ 301.787158][ T7832] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 301.787343][ T7832] ? netconsole_netdev_event+0x2c1/0x620 [ 301.787499][ T7832] ? mutex_is_locked+0x1c/0x60 [ 301.787648][ T7832] ? rtnl_is_locked+0x15/0x20 [ 301.787809][ T7832] ? netdev_master_upper_dev_get+0x13/0x120 [ 301.787996][ T7832] vrf_device_event+0x78/0xe0 [vrf] [ 301.788160][ T7832] notifier_call_chain+0xcd/0x150 [ 301.788320][ T7832] blocking_notifier_call_chain+0x66/0x90 [ 301.788478][ T7832] unregister_netdevice_many_notify+0xa7b/0x1580 [ 301.788669][ T7832] ? hlock_class+0x4e/0x130 [ 301.788816][ T7832] ? mark_lock+0x38/0x3e0 [ 301.788942][ T7832] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 301.789140][ T7832] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 301.789335][ T7832] ? kfree+0xf3/0x330 [ 301.789460][ T7832] ? vlan_vid_del+0x310/0x5e0 [ 301.789623][ T7832] ? vlan_vid_del+0x310/0x5e0 [ 301.789787][ T7832] rtnl_dellink+0x348/0xa40 [ 301.789946][ T7832] ? __pfx_rtnl_dellink+0x10/0x10 [ 301.790125][ T7832] ? find_held_lock+0x2c/0x110 [ 301.790283][ T7832] ? __lock_release+0x103/0x460 [ 301.790440][ T7832] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 301.790595][ T7832] ? __pfx___lock_release+0x10/0x10 [ 301.790756][ T7832] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 301.790909][ T7832] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 301.791068][ T7832] ? __pfx_rtnl_dellink+0x10/0x10 [ 301.791228][ T7832] rtnetlink_rcv_msg+0x712/0xc10 [ 301.791387][ T7832] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 301.791546][ T7832] ? hlock_class+0x4e/0x130 [ 301.791703][ T7832] ? mark_lock+0x38/0x3e0 [ 301.791819][ T7832] ? __lock_acquire+0xb9a/0x1680 [ 301.791989][ T7832] netlink_rcv_skb+0x130/0x360 [ 301.792151][ T7832] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 301.792319][ T7832] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 301.792486][ T7832] ? netlink_deliver_tap+0x13e/0x340 [ 301.792648][ T7832] ? netlink_deliver_tap+0xc3/0x340 [ 301.792809][ T7832] netlink_unicast+0x44b/0x710 [ 301.792966][ T7832] ? __pfx_netlink_unicast+0x10/0x10 [ 301.793121][ T7832] ? find_held_lock+0x2c/0x110 [ 301.793286][ T7832] netlink_sendmsg+0x723/0xbe0 [ 301.793437][ T7832] ? __pfx_netlink_sendmsg+0x10/0x10 [ 301.793602][ T7832] ____sys_sendmsg+0x7ac/0xa10 [ 301.793754][ T7832] ? __pfx_____sys_sendmsg+0x10/0x10 [ 301.793904][ T7832] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 301.794096][ T7832] ___sys_sendmsg+0xee/0x170 [ 301.794247][ T7832] ? __pfx____sys_sendmsg+0x10/0x10 [ 301.794398][ T7832] ? kasan_save_stack+0x34/0x50 [ 301.794559][ T7832] ? kasan_save_stack+0x24/0x50 [ 301.794711][ T7832] ? __kasan_record_aux_stack+0x8e/0xa0 [ 301.794871][ T7832] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 301.795059][ T7832] ? __x64_sys_close+0x7c/0xd0 [ 301.795219][ T7832] ? do_syscall_64+0xc1/0x1d0 [ 301.795378][ T7832] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 301.795575][ T7832] ? __lock_acquire+0xb9a/0x1680 [ 301.795728][ T7832] ? find_held_lock+0x2c/0x110 [ 301.795884][ T7832] ? __lock_release+0x103/0x460 [ 301.796033][ T7832] ? __virt_addr_valid+0x22b/0x430 [ 301.796186][ T7832] ? __pfx___lock_release+0x10/0x10 [ 301.796348][ T7832] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 301.796500][ T7832] __sys_sendmsg+0x109/0x1a0 [ 301.796651][ T7832] ? __pfx___sys_sendmsg+0x10/0x10 [ 301.796802][ T7832] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 301.797004][ T7832] do_syscall_64+0xc1/0x1d0 [ 301.797153][ T7832] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 301.797339][ T7832] RIP: 0033:0x7f7d370e99a7 [ 301.797497][ T7832] 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 [ 301.798048][ T7832] RSP: 002b:00007ffeac219ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 301.798274][ T7832] RAX: ffffffffffffffda RBX: 00007ffeac21a410 RCX: 00007f7d370e99a7 [ 301.798505][ T7832] RDX: 0000000000000000 RSI: 00007ffeac219d50 RDI: 0000000000000005 [ 301.798737][ T7832] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 301.798971][ T7832] R10: 00007f7d36fa7ef8 R11: 0000000000000246 R12: 0000000000000002 [ 301.799209][ T7832] R13: 0000000067792d3e R14: 0000000000498600 R15: 0000000000000000 [ 301.799436][ T7832]