[ 23.859150][ T234] ip (234) used greatest stack depth: 24512 bytes left [ 27.711074][ T285] br1: port 1(veth1) entered blocking state [ 27.711425][ T285] br1: port 1(veth1) entered disabled state [ 27.711701][ T285] veth1: entered allmulticast mode [ 27.713598][ T285] veth1: entered promiscuous mode [ 27.832499][ T51] br1: port 1(veth1) entered blocking state [ 27.832865][ T51] br1: port 1(veth1) entered forwarding state [ 27.942495][ T288] br1: port 2(veth2) entered blocking state [ 27.942827][ T288] br1: port 2(veth2) entered disabled state [ 27.943077][ T288] veth2: entered allmulticast mode [ 27.945580][ T288] veth2: entered promiscuous mode [ 28.056445][ T50] br1: port 2(veth2) entered blocking state [ 28.056685][ T50] br1: port 2(veth2) entered forwarding state [ 32.292985][ T246] (udev-worker) (246) used greatest stack depth: 24480 bytes left [ 34.431854][ T307] GACT probability NOT on [ 34.448299][ T305] tc (305) used greatest stack depth: 24304 bytes left [ 43.325267][ C3] [ 43.325419][ C3] ======================================================== [ 43.325638][ C3] WARNING: possible irq lock inversion dependency detected [ 43.325859][ C3] 6.9.0-rc1-virtme #1 Not tainted [ 43.325998][ C3] -------------------------------------------------------- [ 43.326212][ C3] swapper/3/0 just changed the state of lock: [ 43.326406][ C3] ffff888008962c38 (&br->lock){+.-.}-{2:2}, at: br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.326746][ C3] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 43.326951][ C3] (&p->alloc_lock){+.+.}-{2:2} [ 43.326955][ C3] [ 43.326955][ C3] [ 43.326955][ C3] and interrupts could create inverse lock ordering between them. [ 43.326955][ C3] [ 43.327490][ C3] [ 43.327490][ C3] other info that might help us debug this: [ 43.327718][ C3] Chain exists of: [ 43.327718][ C3] &br->lock --> lweventlist_lock --> &p->alloc_lock [ 43.327718][ C3] [ 43.328029][ C3] Possible interrupt unsafe locking scenario: [ 43.328029][ C3] [ 43.328231][ C3] CPU0 CPU1 [ 43.328370][ C3] ---- ---- [ 43.328510][ C3] lock(&p->alloc_lock); [ 43.328626][ C3] local_irq_disable(); [ 43.328796][ C3] lock(&br->lock); [ 43.328974][ C3] lock(lweventlist_lock); [ 43.329151][ C3] [ 43.329258][ C3] lock(&br->lock); [ 43.329366][ C3] [ 43.329366][ C3] *** DEADLOCK *** [ 43.329366][ C3] [ 43.329571][ C3] 1 lock held by swapper/3/0: [ 43.329718][ C3] #0: ffffc90000288b68 ((&p->forward_delay_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 43.330005][ C3] [ 43.330005][ C3] the shortest dependencies between 2nd lock and 1st lock: [ 43.330244][ C3] -> (&p->alloc_lock){+.+.}-{2:2} { [ 43.330388][ C3] HARDIRQ-ON-W at: [ 43.330495][ C3] __lock_acquire+0x797/0x1570 [ 43.330676][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.330859][ C3] _raw_spin_lock+0x30/0x40 [ 43.331038][ C3] set_mems_allowed+0x1d/0x210 [ 43.331214][ C3] kernel_init_freeable+0x72/0x310 [ 43.331400][ C3] kernel_init+0x20/0x200 [ 43.331585][ C3] ret_from_fork+0x31/0x70 [ 43.331761][ C3] ret_from_fork_asm+0x1a/0x30 [ 43.331944][ C3] SOFTIRQ-ON-W at: [ 43.332049][ C3] __lock_acquire+0x797/0x1570 [ 43.332223][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.332398][ C3] _raw_spin_lock+0x30/0x40 [ 43.332574][ C3] set_mems_allowed+0x1d/0x210 [ 43.332749][ C3] kernel_init_freeable+0x72/0x310 [ 43.332928][ C3] kernel_init+0x20/0x200 [ 43.333104][ C3] ret_from_fork+0x31/0x70 [ 43.333279][ C3] ret_from_fork_asm+0x1a/0x30 [ 43.333453][ C3] INITIAL USE at: [ 43.333557][ C3] __lock_acquire+0x797/0x1570 [ 43.333732][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.333908][ C3] _raw_spin_lock+0x30/0x40 [ 43.334085][ C3] set_mems_allowed+0x1d/0x210 [ 43.334257][ C3] kernel_init_freeable+0x72/0x310 [ 43.334433][ C3] kernel_init+0x20/0x200 [ 43.334607][ C3] ret_from_fork+0x31/0x70 [ 43.334782][ C3] ret_from_fork_asm+0x1a/0x30 [ 43.334962][ C3] } [ 43.335034][ C3] ... key at: [] __key.387+0x0/0x40 [ 43.335247][ C3] ... acquired at: [ 43.335354][ C3] __lock_acquire+0xaf0/0x1570 [ 43.335512][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.335652][ C3] _raw_spin_lock+0x30/0x40 [ 43.335793][ C3] __get_task_comm+0x27/0x70 [ 43.335934][ C3] ref_tracker_alloc+0x2ee/0x490 [ 43.336073][ C3] linkwatch_fire_event+0x196/0x200 [ 43.336218][ C3] veth_newlink+0x367/0x830 [veth] [ 43.336406][ C3] rtnl_newlink_create+0x341/0x850 [ 43.336546][ C3] __rtnl_newlink+0xac9/0xd80 [ 43.336686][ C3] rtnl_newlink+0x63/0xa0 [ 43.336826][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 43.336964][ C3] netlink_rcv_skb+0x130/0x360 [ 43.337104][ C3] netlink_unicast+0x449/0x710 [ 43.337242][ C3] netlink_sendmsg+0x723/0xbe0 [ 43.337390][ C3] ____sys_sendmsg+0x7b2/0xa10 [ 43.337530][ C3] ___sys_sendmsg+0xee/0x170 [ 43.337671][ C3] __sys_sendmsg+0xcd/0x170 [ 43.337811][ C3] do_syscall_64+0xc6/0x1e0 [ 43.337953][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 43.338139][ C3] [ 43.338211][ C3] -> (lweventlist_lock){....}-{2:2} { [ 43.338354][ C3] INITIAL USE at: [ 43.338458][ C3] __lock_acquire+0x797/0x1570 [ 43.338647][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.338823][ C3] _raw_spin_lock_irqsave+0x3f/0x60 [ 43.338999][ C3] linkwatch_sync_dev+0x29/0x1f0 [ 43.339180][ C3] rtnl_getlink+0x4c9/0x970 [ 43.339362][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 43.339553][ C3] netlink_rcv_skb+0x130/0x360 [ 43.339726][ C3] netlink_unicast+0x449/0x710 [ 43.339901][ C3] netlink_sendmsg+0x723/0xbe0 [ 43.340073][ C3] __sys_sendto+0x37d/0x410 [ 43.340249][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 43.340423][ C3] do_syscall_64+0xc6/0x1e0 [ 43.340599][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 43.340810][ C3] } [ 43.340880][ C3] ... key at: [] lweventlist_lock+0x18/0x60 [ 43.341090][ C3] ... acquired at: [ 43.341192][ C3] __lock_acquire+0xaf0/0x1570 [ 43.341333][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.341472][ C3] _raw_spin_lock_irqsave+0x3f/0x60 [ 43.341613][ C3] linkwatch_fire_event+0x74/0x200 [ 43.341759][ C3] br_stp_change_bridge_id+0x25f/0x360 [bridge] [ 43.341973][ C3] br_set_mac_address+0x1f3/0x260 [bridge] [ 43.342179][ C3] dev_set_mac_address+0x28a/0x410 [ 43.342321][ C3] dev_set_mac_address_user+0x31/0x50 [ 43.342460][ C3] do_setlink+0x17b4/0x21e0 [ 43.342598][ C3] rtnl_setlink+0x1f7/0x310 [ 43.342737][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 43.342882][ C3] netlink_rcv_skb+0x130/0x360 [ 43.343022][ C3] netlink_unicast+0x449/0x710 [ 43.343161][ C3] netlink_sendmsg+0x723/0xbe0 [ 43.343300][ C3] __sys_sendto+0x37d/0x410 [ 43.343453][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 43.343594][ C3] do_syscall_64+0xc6/0x1e0 [ 43.343734][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 43.343912][ C3] [ 43.343983][ C3] -> (&br->lock){+.-.}-{2:2} { [ 43.344135][ C3] HARDIRQ-ON-W at: [ 43.344240][ C3] __lock_acquire+0x797/0x1570 [ 43.344417][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.344592][ C3] _raw_spin_lock_bh+0x38/0x50 [ 43.344768][ C3] br_stp_enable_bridge+0x1f/0x2f0 [bridge] [ 43.345013][ C3] br_dev_open+0xa2/0x120 [bridge] [ 43.345221][ C3] __dev_open+0x221/0x430 [ 43.345402][ C3] __dev_change_flags+0x469/0x6c0 [ 43.345577][ C3] rtnl_configure_link+0x118/0x200 [ 43.345753][ C3] rtnl_newlink_create+0x36e/0x850 [ 43.345927][ C3] __rtnl_newlink+0xac9/0xd80 [ 43.346101][ C3] rtnl_newlink+0x63/0xa0 [ 43.346288][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 43.346473][ C3] netlink_rcv_skb+0x130/0x360 [ 43.346691][ C3] netlink_unicast+0x449/0x710 [ 43.346866][ C3] netlink_sendmsg+0x723/0xbe0 [ 43.347040][ C3] ____sys_sendmsg+0x7b2/0xa10 [ 43.347216][ C3] ___sys_sendmsg+0xee/0x170 [ 43.347407][ C3] __sys_sendmsg+0xcd/0x170 [ 43.347585][ C3] do_syscall_64+0xc6/0x1e0 [ 43.347769][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 43.347980][ C3] IN-SOFTIRQ-W at: [ 43.348087][ C3] __lock_acquire+0x797/0x1570 [ 43.348261][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.348446][ C3] _raw_spin_lock+0x30/0x40 [ 43.348628][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.348876][ C3] call_timer_fn+0x13b/0x230 [ 43.349054][ C3] __run_timers+0x545/0x810 [ 43.349227][ C3] timer_expire_remote+0x9b/0xe0 [ 43.349456][ C3] tmigr_handle_remote_cpu+0x270/0x430 [ 43.349709][ C3] tmigr_handle_remote_up+0x19f/0x2e0 [ 43.349974][ C3] tmigr_handle_remote+0x21d/0x3a0 [ 43.350245][ C3] __do_softirq+0x1f8/0x5df [ 43.350519][ C3] irq_exit_rcu+0x97/0xc0 [ 43.350807][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 43.351136][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 43.351475][ C3] default_idle+0xf/0x20 [ 43.351757][ C3] default_idle_call+0x6d/0xb0 [ 43.352033][ C3] cpuidle_idle_call+0x1f4/0x280 [ 43.352315][ C3] do_idle+0xf9/0x160 [ 43.352538][ C3] cpu_startup_entry+0x54/0x60 [ 43.352819][ C3] start_secondary+0x21c/0x2b0 [ 43.353099][ C3] common_startup_64+0x12c/0x138 [ 43.353310][ C3] INITIAL USE at: [ 43.353429][ C3] __lock_acquire+0x797/0x1570 [ 43.353616][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.353791][ C3] _raw_spin_lock_bh+0x38/0x50 [ 43.353967][ C3] br_stp_enable_bridge+0x1f/0x2f0 [bridge] [ 43.354218][ C3] br_dev_open+0xa2/0x120 [bridge] [ 43.354442][ C3] __dev_open+0x221/0x430 [ 43.354617][ C3] __dev_change_flags+0x469/0x6c0 [ 43.354802][ C3] rtnl_configure_link+0x118/0x200 [ 43.354976][ C3] rtnl_newlink_create+0x36e/0x850 [ 43.355150][ C3] __rtnl_newlink+0xac9/0xd80 [ 43.355324][ C3] rtnl_newlink+0x63/0xa0 [ 43.355510][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 43.355685][ C3] netlink_rcv_skb+0x130/0x360 [ 43.355858][ C3] netlink_unicast+0x449/0x710 [ 43.356038][ C3] netlink_sendmsg+0x723/0xbe0 [ 43.356211][ C3] ____sys_sendmsg+0x7b2/0xa10 [ 43.356438][ C3] ___sys_sendmsg+0xee/0x170 [ 43.356613][ C3] __sys_sendmsg+0xcd/0x170 [ 43.356873][ C3] do_syscall_64+0xc6/0x1e0 [ 43.357046][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 43.357258][ C3] } [ 43.357418][ C3] ... key at: [] __key.6+0x0/0xfffffffffffe5ac0 [bridge] [ 43.357704][ C3] ... acquired at: [ 43.357818][ C3] mark_lock+0x28d/0x3e0 [ 43.357958][ C3] mark_usage+0xd9/0x2a0 [ 43.358178][ C3] __lock_acquire+0x797/0x1570 [ 43.358316][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.358464][ C3] _raw_spin_lock+0x30/0x40 [ 43.358603][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.358998][ C3] call_timer_fn+0x13b/0x230 [ 43.359139][ C3] __run_timers+0x545/0x810 [ 43.359279][ C3] timer_expire_remote+0x9b/0xe0 [ 43.359422][ C3] tmigr_handle_remote_cpu+0x270/0x430 [ 43.359642][ C3] tmigr_handle_remote_up+0x19f/0x2e0 [ 43.359779][ C3] tmigr_handle_remote+0x21d/0x3a0 [ 43.359917][ C3] __do_softirq+0x1f8/0x5df [ 43.360095][ C3] irq_exit_rcu+0x97/0xc0 [ 43.360295][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 43.360682][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 43.360942][ C3] default_idle+0xf/0x20 [ 43.361151][ C3] default_idle_call+0x6d/0xb0 [ 43.361496][ C3] cpuidle_idle_call+0x1f4/0x280 [ 43.361703][ C3] do_idle+0xf9/0x160 [ 43.361852][ C3] cpu_startup_entry+0x54/0x60 [ 43.362069][ C3] start_secondary+0x21c/0x2b0 [ 43.362277][ C3] common_startup_64+0x12c/0x138 [ 43.362615][ C3] [ 43.362715][ C3] [ 43.362715][ C3] stack backtrace: [ 43.362975][ C3] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.9.0-rc1-virtme #1 [ 43.363307][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 43.363908][ C3] Call Trace: [ 43.364073][ C3] [ 43.364189][ C3] dump_stack_lvl+0x82/0xd0 [ 43.364394][ C3] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 43.364767][ C3] ? common_startup_64+0x12c/0x138 [ 43.364974][ C3] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 43.365236][ C3] ? __pfx_usage_skip+0x10/0x10 [ 43.365579][ C3] ? __pfx_usage_match+0x10/0x10 [ 43.365789][ C3] ? arch_stack_walk+0x8c/0xf0 [ 43.366014][ C3] mark_lock_irq+0x4cd/0xa10 [ 43.366237][ C3] ? __pfx_mark_lock_irq+0x10/0x10 [ 43.366420][ C3] ? stack_trace_save+0x94/0xd0 [ 43.366779][ C3] ? add_chain_cache+0x248/0x8b0 [ 43.366994][ C3] ? save_trace+0x8f/0x5b0 [ 43.367212][ C3] mark_lock+0x28d/0x3e0 [ 43.367375][ C3] mark_usage+0xd9/0x2a0 [ 43.367668][ C3] __lock_acquire+0x797/0x1570 [ 43.367883][ C3] ? __lock_acquire+0xaf0/0x1570 [ 43.368100][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 43.368488][ C3] lock_acquire.part.0+0xeb/0x330 [ 43.368840][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.369173][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.369386][ C3] ? trace_lock_acquire+0x135/0x1c0 [ 43.369600][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.370051][ C3] ? lock_acquire+0x32/0xc0 [ 43.370272][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.370604][ C3] _raw_spin_lock+0x30/0x40 [ 43.370821][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.371288][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 43.371617][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 43.371996][ C3] call_timer_fn+0x13b/0x230 [ 43.372202][ C3] ? call_timer_fn+0xe8/0x230 [ 43.372419][ C3] ? call_timer_fn+0xe8/0x230 [ 43.372634][ C3] ? __pfx_call_timer_fn+0x10/0x10 [ 43.372846][ C3] ? mark_lock+0x38/0x3e0 [ 43.373019][ C3] __run_timers+0x545/0x810 [ 43.373366][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 43.373702][ C3] ? __pfx___run_timers+0x10/0x10 [ 43.373917][ C3] ? __lock_release+0x103/0x460 [ 43.374250][ C3] ? do_raw_spin_lock+0x131/0x270 [ 43.374472][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 43.374685][ C3] ? lock_acquire+0x32/0xc0 [ 43.374898][ C3] ? timer_expire_remote+0x93/0xe0 [ 43.375121][ C3] timer_expire_remote+0x9b/0xe0 [ 43.375628][ C3] tmigr_handle_remote_cpu+0x270/0x430 [ 43.375851][ C3] ? __pfx_tmigr_handle_remote_cpu+0x10/0x10 [ 43.376135][ C3] tmigr_handle_remote_up+0x19f/0x2e0 [ 43.376372][ C3] tmigr_handle_remote+0x21d/0x3a0 [ 43.376751][ C3] ? do_raw_spin_lock+0x131/0x270 [ 43.376971][ C3] ? __pfx_tmigr_handle_remote+0x10/0x10 [ 43.377189][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 43.377415][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 43.377837][ C3] __do_softirq+0x1f8/0x5df [ 43.378043][ C3] irq_exit_rcu+0x97/0xc0 [ 43.378150][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 43.378295][ C3] [ 43.378373][ C3] [ 43.378568][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 43.378749][ C3] RIP: 0010:default_idle+0xf/0x20 [ 43.378898][ C3] 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 a3 30 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 [ 43.379489][ C3] RSP: 0018:ffffc9000016fdf8 EFLAGS: 00000246 [ 43.379677][ C3] RAX: 0000000000089a35 RBX: 1ffff9200002dfc1 RCX: ffffffffb350e9d5 [ 43.379982][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb0eaa4a4 [ 43.380188][ C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3709c [ 43.380421][ C3] R10: ffff8880361b84e3 R11: ffff8880361ad9b0 R12: 0000000000000000 [ 43.380715][ C3] R13: ffff888001b88040 R14: dffffc0000000000 R15: 0000000000000000 [ 43.380925][ C3] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 43.381063][ C3] ? cpuidle_idle_call+0x1f4/0x280 [ 43.381203][ C3] default_idle_call+0x6d/0xb0 [ 43.381467][ C3] cpuidle_idle_call+0x1f4/0x280 [ 43.381679][ C3] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 43.381900][ C3] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 43.382117][ C3] do_idle+0xf9/0x160 [ 43.382440][ C3] cpu_startup_entry+0x54/0x60 [ 43.382673][ C3] start_secondary+0x21c/0x2b0 [ 43.382906][ C3] ? __pfx_start_secondary+0x10/0x10 [ 43.383138][ C3] common_startup_64+0x12c/0x138 [ 43.383515][ C3] [ 54.767891][ T473] br1: port 2(veth2) entered disabled state [ 54.878435][ T475] veth2: left allmulticast mode [ 54.878641][ T475] veth2: left promiscuous mode [ 54.878905][ T475] br1: port 2(veth2) entered disabled state [ 54.977661][ T476] br1: port 1(veth1) entered disabled state [ 55.071193][ T477] veth1: left allmulticast mode [ 55.071362][ T477] veth1: left promiscuous mode [ 55.071606][ T477] br1: port 1(veth1) entered disabled state