[ 26.581654][ T271] ip (271) used greatest stack depth: 24592 bytes left [ 26.899630][ T274] 8021q: 802.1Q VLAN Support v1.8 [ 29.410396][ T298] br0: port 1(veth1) entered blocking state [ 29.410810][ T298] br0: port 1(veth1) entered disabled state [ 29.411291][ T298] veth1: entered allmulticast mode [ 29.414124][ T298] veth1: entered promiscuous mode [ 29.427127][ T298] ip (298) used greatest stack depth: 24056 bytes left [ 29.526607][ T300] br0: port 2(veth2) entered blocking state [ 29.527086][ T300] br0: port 2(veth2) entered disabled state [ 29.527325][ T300] veth2: entered allmulticast mode [ 29.529177][ T300] veth2: entered promiscuous mode [ 29.757114][ T50] br0: port 1(veth1) entered blocking state [ 29.757601][ T50] br0: port 1(veth1) entered forwarding state [ 29.874395][ T50] br0: port 2(veth2) entered blocking state [ 29.874628][ T50] br0: port 2(veth2) entered forwarding state [ 44.842998][ C1] [ 44.843210][ C1] ======================================================== [ 44.843440][ C1] WARNING: possible irq lock inversion dependency detected [ 44.843661][ C1] 6.9.0-rc1-virtme #1 Not tainted [ 44.843807][ C1] -------------------------------------------------------- [ 44.844027][ C1] swapper/1/0 just changed the state of lock: [ 44.844208][ C1] ffff888005daac38 (&br->lock){+.-.}-{2:2}, at: br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.844584][ C1] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 44.844794][ C1] (&p->alloc_lock){+.+.}-{2:2} [ 44.844798][ C1] [ 44.844798][ C1] [ 44.844798][ C1] and interrupts could create inverse lock ordering between them. [ 44.844798][ C1] [ 44.845331][ C1] [ 44.845331][ C1] other info that might help us debug this: [ 44.845548][ C1] Chain exists of: [ 44.845548][ C1] &br->lock --> lweventlist_lock --> &p->alloc_lock [ 44.845548][ C1] [ 44.845875][ C1] Possible interrupt unsafe locking scenario: [ 44.845875][ C1] [ 44.846085][ C1] CPU0 CPU1 [ 44.846226][ C1] ---- ---- [ 44.846368][ C1] lock(&p->alloc_lock); [ 44.846481][ C1] local_irq_disable(); [ 44.846659][ C1] lock(&br->lock); [ 44.846838][ C1] lock(lweventlist_lock); [ 44.847021][ C1] [ 44.847131][ C1] lock(&br->lock); [ 44.847240][ C1] [ 44.847240][ C1] *** DEADLOCK *** [ 44.847240][ C1] [ 44.847454][ C1] 1 lock held by swapper/1/0: [ 44.847616][ C1] #0: ffffc900001d8d68 ((&p->forward_delay_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 44.847911][ C1] [ 44.847911][ C1] the shortest dependencies between 2nd lock and 1st lock: [ 44.848155][ C1] -> (&p->alloc_lock){+.+.}-{2:2} { [ 44.848335][ C1] HARDIRQ-ON-W at: [ 44.848444][ C1] __lock_acquire+0x797/0x1570 [ 44.848628][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.848811][ C1] _raw_spin_lock+0x30/0x40 [ 44.848994][ C1] set_mems_allowed+0x1d/0x210 [ 44.849172][ C1] kernel_init_freeable+0x72/0x310 [ 44.849355][ C1] kernel_init+0x20/0x200 [ 44.849536][ C1] ret_from_fork+0x31/0x70 [ 44.849713][ C1] ret_from_fork_asm+0x1a/0x30 [ 44.849897][ C1] SOFTIRQ-ON-W at: [ 44.850006][ C1] __lock_acquire+0x797/0x1570 [ 44.850189][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.850370][ C1] _raw_spin_lock+0x30/0x40 [ 44.850563][ C1] set_mems_allowed+0x1d/0x210 [ 44.850747][ C1] kernel_init_freeable+0x72/0x310 [ 44.850932][ C1] kernel_init+0x20/0x200 [ 44.851117][ C1] ret_from_fork+0x31/0x70 [ 44.851303][ C1] ret_from_fork_asm+0x1a/0x30 [ 44.851486][ C1] INITIAL USE at: [ 44.851594][ C1] __lock_acquire+0x797/0x1570 [ 44.851774][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.851959][ C1] _raw_spin_lock+0x30/0x40 [ 44.852142][ C1] set_mems_allowed+0x1d/0x210 [ 44.852320][ C1] kernel_init_freeable+0x72/0x310 [ 44.852501][ C1] kernel_init+0x20/0x200 [ 44.852682][ C1] ret_from_fork+0x31/0x70 [ 44.852861][ C1] ret_from_fork_asm+0x1a/0x30 [ 44.853052][ C1] } [ 44.853132][ C1] ... key at: [] __key.387+0x0/0x40 [ 44.853358][ C1] ... acquired at: [ 44.853465][ C1] __lock_acquire+0xaf0/0x1570 [ 44.853620][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.853764][ C1] _raw_spin_lock+0x30/0x40 [ 44.853910][ C1] __get_task_comm+0x27/0x70 [ 44.854057][ C1] ref_tracker_alloc+0x2ee/0x490 [ 44.854206][ C1] linkwatch_fire_event+0x196/0x200 [ 44.854354][ C1] veth_newlink+0x367/0x830 [veth] [ 44.854504][ C1] rtnl_newlink_create+0x341/0x850 [ 44.854651][ C1] __rtnl_newlink+0xac9/0xd80 [ 44.854793][ C1] rtnl_newlink+0x63/0xa0 [ 44.854939][ C1] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.855081][ C1] netlink_rcv_skb+0x130/0x360 [ 44.855226][ C1] netlink_unicast+0x449/0x710 [ 44.855373][ C1] netlink_sendmsg+0x723/0xbe0 [ 44.855518][ C1] ____sys_sendmsg+0x7b2/0xa10 [ 44.855664][ C1] ___sys_sendmsg+0xee/0x170 [ 44.855812][ C1] __sys_sendmsg+0xcd/0x170 [ 44.855959][ C1] do_syscall_64+0xc6/0x1e0 [ 44.856112][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.856291][ C1] [ 44.856371][ C1] -> (lweventlist_lock){....}-{2:2} { [ 44.856524][ C1] INITIAL USE at: [ 44.856639][ C1] __lock_acquire+0x797/0x1570 [ 44.856819][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.856998][ C1] _raw_spin_lock_irqsave+0x3f/0x60 [ 44.857179][ C1] linkwatch_sync_dev+0x29/0x1f0 [ 44.857359][ C1] rtnl_getlink+0x4c9/0x970 [ 44.857539][ C1] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.857725][ C1] netlink_rcv_skb+0x130/0x360 [ 44.857905][ C1] netlink_unicast+0x449/0x710 [ 44.858084][ C1] netlink_sendmsg+0x723/0xbe0 [ 44.858266][ C1] __sys_sendto+0x37d/0x410 [ 44.858450][ C1] __x64_sys_sendto+0xe0/0x1c0 [ 44.858632][ C1] do_syscall_64+0xc6/0x1e0 [ 44.858820][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.859041][ C1] } [ 44.859113][ C1] ... key at: [] lweventlist_lock+0x18/0x60 [ 44.859339][ C1] ... acquired at: [ 44.859444][ C1] __lock_acquire+0xaf0/0x1570 [ 44.859588][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.859729][ C1] _raw_spin_lock_irqsave+0x3f/0x60 [ 44.859877][ C1] linkwatch_fire_event+0x74/0x200 [ 44.860019][ C1] br_stp_change_bridge_id+0x25f/0x360 [bridge] [ 44.860244][ C1] br_set_mac_address+0x1f3/0x260 [bridge] [ 44.860454][ C1] dev_set_mac_address+0x28a/0x410 [ 44.860610][ C1] dev_set_mac_address_user+0x31/0x50 [ 44.860754][ C1] do_setlink+0x17b4/0x21e0 [ 44.860900][ C1] rtnl_setlink+0x1f7/0x310 [ 44.861041][ C1] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.861190][ C1] netlink_rcv_skb+0x130/0x360 [ 44.861331][ C1] netlink_unicast+0x449/0x710 [ 44.861473][ C1] netlink_sendmsg+0x723/0xbe0 [ 44.861617][ C1] __sys_sendto+0x37d/0x410 [ 44.861759][ C1] __x64_sys_sendto+0xe0/0x1c0 [ 44.861905][ C1] do_syscall_64+0xc6/0x1e0 [ 44.862049][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.862227][ C1] [ 44.862299][ C1] -> (&br->lock){+.-.}-{2:2} { [ 44.862456][ C1] HARDIRQ-ON-W at: [ 44.862565][ C1] __lock_acquire+0x797/0x1570 [ 44.862758][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.862944][ C1] _raw_spin_lock_bh+0x38/0x50 [ 44.863125][ C1] recalculate_group_addr+0x55/0x130 [bridge] [ 44.863383][ C1] br_vlan_filter_toggle+0x77/0x130 [bridge] [ 44.863637][ C1] br_changelink+0x36c/0x1360 [bridge] [ 44.863858][ C1] br_dev_newlink+0xa5/0x100 [bridge] [ 44.864078][ C1] rtnl_newlink_create+0x341/0x850 [ 44.864256][ C1] __rtnl_newlink+0xac9/0xd80 [ 44.864439][ C1] rtnl_newlink+0x63/0xa0 [ 44.864621][ C1] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.864802][ C1] netlink_rcv_skb+0x130/0x360 [ 44.864988][ C1] netlink_unicast+0x449/0x710 [ 44.865169][ C1] netlink_sendmsg+0x723/0xbe0 [ 44.865354][ C1] ____sys_sendmsg+0x7b2/0xa10 [ 44.865536][ C1] ___sys_sendmsg+0xee/0x170 [ 44.865717][ C1] __sys_sendmsg+0xcd/0x170 [ 44.865898][ C1] do_syscall_64+0xc6/0x1e0 [ 44.866080][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.866301][ C1] IN-SOFTIRQ-W at: [ 44.866410][ C1] __lock_acquire+0x797/0x1570 [ 44.866592][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.866771][ C1] _raw_spin_lock+0x30/0x40 [ 44.866952][ C1] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.867204][ C1] call_timer_fn+0x13b/0x230 [ 44.867386][ C1] __run_timers+0x545/0x810 [ 44.867565][ C1] run_timer_softirq+0xe8/0x1b0 [ 44.867746][ C1] __do_softirq+0x1f8/0x5df [ 44.867928][ C1] irq_exit_rcu+0x97/0xc0 [ 44.868110][ C1] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.868328][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.868553][ C1] default_idle+0xf/0x20 [ 44.868732][ C1] default_idle_call+0x6d/0xb0 [ 44.868911][ C1] cpuidle_idle_call+0x1f4/0x280 [ 44.869093][ C1] do_idle+0xf9/0x160 [ 44.869238][ C1] cpu_startup_entry+0x54/0x60 [ 44.869420][ C1] start_secondary+0x21c/0x2b0 [ 44.869599][ C1] common_startup_64+0x12c/0x138 [ 44.869784][ C1] INITIAL USE at: [ 44.869891][ C1] __lock_acquire+0x797/0x1570 [ 44.870071][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.870258][ C1] _raw_spin_lock_bh+0x38/0x50 [ 44.870438][ C1] recalculate_group_addr+0x55/0x130 [bridge] [ 44.870748][ C1] br_vlan_filter_toggle+0x77/0x130 [bridge] [ 44.871006][ C1] br_changelink+0x36c/0x1360 [bridge] [ 44.871226][ C1] br_dev_newlink+0xa5/0x100 [bridge] [ 44.871443][ C1] rtnl_newlink_create+0x341/0x850 [ 44.871622][ C1] __rtnl_newlink+0xac9/0xd80 [ 44.871803][ C1] rtnl_newlink+0x63/0xa0 [ 44.871981][ C1] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.872162][ C1] netlink_rcv_skb+0x130/0x360 [ 44.872357][ C1] netlink_unicast+0x449/0x710 [ 44.872536][ C1] netlink_sendmsg+0x723/0xbe0 [ 44.872715][ C1] ____sys_sendmsg+0x7b2/0xa10 [ 44.872893][ C1] ___sys_sendmsg+0xee/0x170 [ 44.873075][ C1] __sys_sendmsg+0xcd/0x170 [ 44.873253][ C1] do_syscall_64+0xc6/0x1e0 [ 44.873434][ C1] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.873728][ C1] } [ 44.873800][ C1] ... key at: [] __key.6+0x0/0xfffffffffffe5ac0 [bridge] [ 44.874081][ C1] ... acquired at: [ 44.874187][ C1] mark_lock+0x28d/0x3e0 [ 44.874407][ C1] mark_usage+0xd9/0x2a0 [ 44.874554][ C1] __lock_acquire+0x797/0x1570 [ 44.874696][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.874843][ C1] _raw_spin_lock+0x30/0x40 [ 44.874993][ C1] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.875286][ C1] call_timer_fn+0x13b/0x230 [ 44.875435][ C1] __run_timers+0x545/0x810 [ 44.875593][ C1] run_timer_softirq+0xe8/0x1b0 [ 44.875736][ C1] __do_softirq+0x1f8/0x5df [ 44.875953][ C1] irq_exit_rcu+0x97/0xc0 [ 44.876102][ C1] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.876281][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.876535][ C1] default_idle+0xf/0x20 [ 44.876678][ C1] default_idle_call+0x6d/0xb0 [ 44.876820][ C1] cpuidle_idle_call+0x1f4/0x280 [ 44.876966][ C1] do_idle+0xf9/0x160 [ 44.877076][ C1] cpu_startup_entry+0x54/0x60 [ 44.877294][ C1] start_secondary+0x21c/0x2b0 [ 44.877437][ C1] common_startup_64+0x12c/0x138 [ 44.877586][ C1] [ 44.877658][ C1] [ 44.877658][ C1] stack backtrace: [ 44.877907][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.9.0-rc1-virtme #1 [ 44.878127][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.878458][ C1] Call Trace: [ 44.878568][ C1] [ 44.878643][ C1] dump_stack_lvl+0x82/0xd0 [ 44.878789][ C1] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 44.878976][ C1] ? common_startup_64+0x12c/0x138 [ 44.879119][ C1] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 44.879373][ C1] ? __pfx_usage_skip+0x10/0x10 [ 44.879514][ C1] ? __pfx_usage_match+0x10/0x10 [ 44.879658][ C1] ? arch_stack_walk+0x8c/0xf0 [ 44.879804][ C1] mark_lock_irq+0x4cd/0xa10 [ 44.880027][ C1] ? __pfx_mark_lock_irq+0x10/0x10 [ 44.880182][ C1] ? stack_trace_save+0x94/0xd0 [ 44.880327][ C1] ? add_chain_cache+0x248/0x8b0 [ 44.880480][ C1] ? save_trace+0x8f/0x5b0 [ 44.880638][ C1] mark_lock+0x28d/0x3e0 [ 44.880749][ C1] mark_usage+0xd9/0x2a0 [ 44.880859][ C1] __lock_acquire+0x797/0x1570 [ 44.881004][ C1] ? trace_rcu_dyntick+0x112/0x180 [ 44.881151][ C1] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.881484][ C1] lock_acquire.part.0+0xeb/0x330 [ 44.881631][ C1] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.881851][ C1] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.882071][ C1] ? trace_lock_acquire+0x135/0x1c0 [ 44.882217][ C1] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.882429][ C1] ? lock_acquire+0x32/0xc0 [ 44.882583][ C1] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.882880][ C1] _raw_spin_lock+0x30/0x40 [ 44.883023][ C1] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.883237][ C1] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.883453][ C1] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.883779][ C1] call_timer_fn+0x13b/0x230 [ 44.883924][ C1] ? call_timer_fn+0xe8/0x230 [ 44.884066][ C1] ? call_timer_fn+0xe8/0x230 [ 44.884284][ C1] ? __pfx_call_timer_fn+0x10/0x10 [ 44.884440][ C1] ? mark_lock+0x38/0x3e0 [ 44.884557][ C1] __run_timers+0x545/0x810 [ 44.884704][ C1] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.885033][ C1] ? __pfx___run_timers+0x10/0x10 [ 44.885178][ C1] ? do_raw_spin_lock+0x131/0x270 [ 44.885326][ C1] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 44.885468][ C1] ? lock_acquire+0x32/0xc0 [ 44.885613][ C1] ? run_timer_softirq+0xe0/0x1b0 [ 44.885836][ C1] run_timer_softirq+0xe8/0x1b0 [ 44.885981][ C1] __do_softirq+0x1f8/0x5df [ 44.886126][ C1] irq_exit_rcu+0x97/0xc0 [ 44.886239][ C1] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.886456][ C1] [ 44.886530][ C1] [ 44.886602][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.886777][ C1] RIP: 0010:default_idle+0xf/0x20 [ 44.886926][ C1] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 20 35 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 44.887610][ C1] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000246 [ 44.887791][ C1] RAX: 000000000008b8ed RBX: 1ffff92000029fc1 RCX: ffffffff9790f9e5 [ 44.888084][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff952aa4a4 [ 44.888303][ C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c1709c [ 44.888513][ C1] R10: ffff8880360b84e3 R11: ffff8880360ad9b0 R12: 0000000000000000 [ 44.888728][ C1] R13: ffff888001b7a300 R14: dffffc0000000000 R15: 0000000000000000 [ 44.888944][ C1] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 44.889088][ C1] ? cpuidle_idle_call+0x1f4/0x280 [ 44.889307][ C1] default_idle_call+0x6d/0xb0 [ 44.889457][ C1] cpuidle_idle_call+0x1f4/0x280 [ 44.889601][ C1] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 44.889747][ C1] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 44.889965][ C1] do_idle+0xf9/0x160 [ 44.890074][ C1] cpu_startup_entry+0x54/0x60 [ 44.890215][ C1] start_secondary+0x21c/0x2b0 [ 44.890360][ C1] ? __pfx_start_secondary+0x10/0x10 [ 44.890512][ C1] common_startup_64+0x12c/0x138 [ 44.890667][ C1] [ 60.948240][ T375] br0: port 2(veth2) entered disabled state [ 61.037922][ T376] br0: port 1(veth1) entered disabled state [ 61.137845][ T377] veth2: left allmulticast mode [ 61.138108][ T377] veth2: left promiscuous mode [ 61.138364][ T377] br0: port 2(veth2) entered disabled state [ 61.139300][ T377] veth1: left allmulticast mode [ 61.139447][ T377] veth1: left promiscuous mode [ 61.139686][ T377] br0: port 1(veth1) entered disabled state