[ 28.665540][ T285] br0: port 1(veth1) entered blocking state [ 28.666295][ T285] br0: port 1(veth1) entered disabled state [ 28.666678][ T285] veth1: entered allmulticast mode [ 28.668925][ T285] veth1: entered promiscuous mode [ 28.677082][ T285] ip (285) used greatest stack depth: 24096 bytes left [ 28.800412][ T287] br0: port 2(veth2) entered blocking state [ 28.800672][ T287] br0: port 2(veth2) entered disabled state [ 28.800938][ T287] veth2: entered allmulticast mode [ 28.802998][ T287] veth2: entered promiscuous mode [ 29.042209][ T49] br0: port 1(veth1) entered blocking state [ 29.042585][ T49] br0: port 1(veth1) entered forwarding state [ 39.692690][ T51] br0: port 2(veth2) entered blocking state [ 39.692999][ T51] br0: port 2(veth2) entered forwarding state [ 44.333331][ C3] [ 44.333480][ C3] ======================================================== [ 44.333693][ C3] WARNING: possible irq lock inversion dependency detected [ 44.333899][ C3] 6.9.0-rc1-virtme #1 Not tainted [ 44.334051][ C3] -------------------------------------------------------- [ 44.334316][ C3] swapper/3/0 just changed the state of lock: [ 44.334492][ C3] ffff888006992c38 (&br->lock){+.-.}-{2:2}, at: br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.334829][ C3] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 44.335029][ C3] (&p->alloc_lock){+.+.}-{2:2} [ 44.335033][ C3] [ 44.335033][ C3] [ 44.335033][ C3] and interrupts could create inverse lock ordering between them. [ 44.335033][ C3] [ 44.335534][ C3] [ 44.335534][ C3] other info that might help us debug this: [ 44.335733][ C3] Chain exists of: [ 44.335733][ C3] &br->lock --> lweventlist_lock --> &p->alloc_lock [ 44.335733][ C3] [ 44.336041][ C3] Possible interrupt unsafe locking scenario: [ 44.336041][ C3] [ 44.336235][ C3] CPU0 CPU1 [ 44.336371][ C3] ---- ---- [ 44.336506][ C3] lock(&p->alloc_lock); [ 44.336608][ C3] local_irq_disable(); [ 44.336771][ C3] lock(&br->lock); [ 44.336940][ C3] lock(lweventlist_lock); [ 44.337110][ C3] [ 44.337212][ C3] lock(&br->lock); [ 44.337322][ C3] [ 44.337322][ C3] *** DEADLOCK *** [ 44.337322][ C3] [ 44.337521][ C3] 1 lock held by swapper/3/0: [ 44.337658][ C3] #0: ffffc90000288d68 ((&p->forward_delay_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 44.337937][ C3] [ 44.337937][ C3] the shortest dependencies between 2nd lock and 1st lock: [ 44.338172][ C3] -> (&p->alloc_lock){+.+.}-{2:2} { [ 44.338319][ C3] HARDIRQ-ON-W at: [ 44.338423][ C3] __lock_acquire+0x797/0x1570 [ 44.338595][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.338763][ C3] _raw_spin_lock+0x30/0x40 [ 44.338936][ C3] set_mems_allowed+0x1d/0x210 [ 44.339151][ C3] kernel_init_freeable+0x72/0x310 [ 44.339328][ C3] kernel_init+0x20/0x200 [ 44.339523][ C3] ret_from_fork+0x31/0x70 [ 44.339704][ C3] ret_from_fork_asm+0x1a/0x30 [ 44.339875][ C3] SOFTIRQ-ON-W at: [ 44.339976][ C3] __lock_acquire+0x797/0x1570 [ 44.340150][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.340321][ C3] _raw_spin_lock+0x30/0x40 [ 44.340497][ C3] set_mems_allowed+0x1d/0x210 [ 44.340673][ C3] kernel_init_freeable+0x72/0x310 [ 44.340845][ C3] kernel_init+0x20/0x200 [ 44.341019][ C3] ret_from_fork+0x31/0x70 [ 44.341191][ C3] ret_from_fork_asm+0x1a/0x30 [ 44.341368][ C3] INITIAL USE at: [ 44.341476][ C3] __lock_acquire+0x797/0x1570 [ 44.341647][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.341823][ C3] _raw_spin_lock+0x30/0x40 [ 44.341995][ C3] set_mems_allowed+0x1d/0x210 [ 44.342168][ C3] kernel_init_freeable+0x72/0x310 [ 44.342336][ C3] kernel_init+0x20/0x200 [ 44.342519][ C3] ret_from_fork+0x31/0x70 [ 44.342691][ C3] ret_from_fork_asm+0x1a/0x30 [ 44.342861][ C3] } [ 44.342930][ C3] ... key at: [] __key.387+0x0/0x40 [ 44.343135][ C3] ... acquired at: [ 44.343236][ C3] __lock_acquire+0xaf0/0x1570 [ 44.343375][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.343509][ C3] _raw_spin_lock+0x30/0x40 [ 44.343658][ C3] __get_task_comm+0x27/0x70 [ 44.343797][ C3] ref_tracker_alloc+0x2ee/0x490 [ 44.343936][ C3] linkwatch_fire_event+0x196/0x200 [ 44.344072][ C3] veth_newlink+0x367/0x830 [veth] [ 44.344235][ C3] rtnl_newlink_create+0x341/0x850 [ 44.344369][ C3] __rtnl_newlink+0xac9/0xd80 [ 44.344506][ C3] rtnl_newlink+0x63/0xa0 [ 44.344639][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.344780][ C3] netlink_rcv_skb+0x130/0x360 [ 44.344931][ C3] netlink_unicast+0x449/0x710 [ 44.345073][ C3] netlink_sendmsg+0x723/0xbe0 [ 44.345218][ C3] ____sys_sendmsg+0x7b2/0xa10 [ 44.345356][ C3] ___sys_sendmsg+0xee/0x170 [ 44.345499][ C3] __sys_sendmsg+0xcd/0x170 [ 44.345639][ C3] do_syscall_64+0xc6/0x1e0 [ 44.345779][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.345955][ C3] [ 44.346031][ C3] -> (lweventlist_lock){....}-{2:2} { [ 44.346170][ C3] INITIAL USE at: [ 44.346272][ C3] __lock_acquire+0x797/0x1570 [ 44.346457][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.346629][ C3] _raw_spin_lock_irqsave+0x3f/0x60 [ 44.346797][ C3] linkwatch_sync_dev+0x29/0x1f0 [ 44.346973][ C3] rtnl_getlink+0x4c9/0x970 [ 44.347152][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.347322][ C3] netlink_rcv_skb+0x130/0x360 [ 44.347503][ C3] netlink_unicast+0x449/0x710 [ 44.347670][ C3] netlink_sendmsg+0x723/0xbe0 [ 44.347843][ C3] __sys_sendto+0x37d/0x410 [ 44.348021][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 44.348194][ C3] do_syscall_64+0xc6/0x1e0 [ 44.348368][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.348571][ C3] } [ 44.348640][ C3] ... key at: [] lweventlist_lock+0x18/0x60 [ 44.348840][ C3] ... acquired at: [ 44.348945][ C3] __lock_acquire+0xaf0/0x1570 [ 44.349097][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.349231][ C3] _raw_spin_lock_irqsave+0x3f/0x60 [ 44.349368][ C3] linkwatch_fire_event+0x74/0x200 [ 44.349504][ C3] br_stp_change_bridge_id+0x25f/0x360 [bridge] [ 44.349724][ C3] br_set_mac_address+0x1f3/0x260 [bridge] [ 44.349931][ C3] dev_set_mac_address+0x28a/0x410 [ 44.350074][ C3] dev_set_mac_address_user+0x31/0x50 [ 44.350219][ C3] do_setlink+0x17b4/0x21e0 [ 44.350358][ C3] rtnl_setlink+0x1f7/0x310 [ 44.350497][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.350634][ C3] netlink_rcv_skb+0x130/0x360 [ 44.350778][ C3] netlink_unicast+0x449/0x710 [ 44.350918][ C3] netlink_sendmsg+0x723/0xbe0 [ 44.351058][ C3] __sys_sendto+0x37d/0x410 [ 44.351192][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 44.351338][ C3] do_syscall_64+0xc6/0x1e0 [ 44.351482][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.351654][ C3] [ 44.351725][ C3] -> (&br->lock){+.-.}-{2:2} { [ 44.351873][ C3] HARDIRQ-ON-W at: [ 44.351977][ C3] __lock_acquire+0x797/0x1570 [ 44.352158][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.352327][ C3] _raw_spin_lock_bh+0x38/0x50 [ 44.352494][ C3] br_set_mac_address+0xd2/0x260 [bridge] [ 44.352734][ C3] dev_set_mac_address+0x28a/0x410 [ 44.352908][ C3] dev_set_mac_address_user+0x31/0x50 [ 44.353077][ C3] do_setlink+0x17b4/0x21e0 [ 44.353253][ C3] rtnl_setlink+0x1f7/0x310 [ 44.353431][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.353596][ C3] netlink_rcv_skb+0x130/0x360 [ 44.353772][ C3] netlink_unicast+0x449/0x710 [ 44.353943][ C3] netlink_sendmsg+0x723/0xbe0 [ 44.354111][ C3] __sys_sendto+0x37d/0x410 [ 44.354306][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 44.354476][ C3] do_syscall_64+0xc6/0x1e0 [ 44.354643][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.354853][ C3] IN-SOFTIRQ-W at: [ 44.354959][ C3] __lock_acquire+0x797/0x1570 [ 44.355134][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.355303][ C3] _raw_spin_lock+0x30/0x40 [ 44.355471][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.355715][ C3] call_timer_fn+0x13b/0x230 [ 44.355890][ C3] __run_timers+0x545/0x810 [ 44.356065][ C3] run_timer_softirq+0xe8/0x1b0 [ 44.356242][ C3] __do_softirq+0x1f8/0x5df [ 44.356414][ C3] irq_exit_rcu+0x97/0xc0 [ 44.356584][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.356788][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.356992][ C3] default_idle+0xf/0x20 [ 44.357167][ C3] default_idle_call+0x6d/0xb0 [ 44.357334][ C3] cpuidle_idle_call+0x1f4/0x280 [ 44.357587][ C3] do_idle+0xf9/0x160 [ 44.357721][ C3] cpu_startup_entry+0x54/0x60 [ 44.357891][ C3] start_secondary+0x21c/0x2b0 [ 44.358139][ C3] common_startup_64+0x12c/0x138 [ 44.358313][ C3] INITIAL USE at: [ 44.358418][ C3] __lock_acquire+0x797/0x1570 [ 44.358587][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.358842][ C3] _raw_spin_lock_bh+0x38/0x50 [ 44.359014][ C3] br_set_mac_address+0xd2/0x260 [bridge] [ 44.359251][ C3] dev_set_mac_address+0x28a/0x410 [ 44.359576][ C3] dev_set_mac_address_user+0x31/0x50 [ 44.359754][ C3] do_setlink+0x17b4/0x21e0 [ 44.359924][ C3] rtnl_setlink+0x1f7/0x310 [ 44.360100][ C3] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.360356][ C3] netlink_rcv_skb+0x130/0x360 [ 44.360529][ C3] netlink_unicast+0x449/0x710 [ 44.360696][ C3] netlink_sendmsg+0x723/0xbe0 [ 44.360866][ C3] __sys_sendto+0x37d/0x410 [ 44.361043][ C3] __x64_sys_sendto+0xe0/0x1c0 [ 44.361211][ C3] do_syscall_64+0xc6/0x1e0 [ 44.361429][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.361717][ C3] } [ 44.361837][ C3] ... key at: [] __key.6+0x0/0xfffffffffffe5ac0 [bridge] [ 44.362175][ C3] ... acquired at: [ 44.362358][ C3] mark_lock+0x28d/0x3e0 [ 44.362500][ C3] mark_usage+0xd9/0x2a0 [ 44.362634][ C3] __lock_acquire+0x797/0x1570 [ 44.362769][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.362915][ C3] _raw_spin_lock+0x30/0x40 [ 44.363125][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.363330][ C3] call_timer_fn+0x13b/0x230 [ 44.363462][ C3] __run_timers+0x545/0x810 [ 44.363598][ C3] run_timer_softirq+0xe8/0x1b0 [ 44.363816][ C3] __do_softirq+0x1f8/0x5df [ 44.363952][ C3] irq_exit_rcu+0x97/0xc0 [ 44.364086][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.364272][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.364513][ C3] default_idle+0xf/0x20 [ 44.364646][ C3] default_idle_call+0x6d/0xb0 [ 44.364780][ C3] cpuidle_idle_call+0x1f4/0x280 [ 44.364925][ C3] do_idle+0xf9/0x160 [ 44.365104][ C3] cpu_startup_entry+0x54/0x60 [ 44.365244][ C3] start_secondary+0x21c/0x2b0 [ 44.365384][ C3] common_startup_64+0x12c/0x138 [ 44.365536][ C3] [ 44.365623][ C3] [ 44.365623][ C3] stack backtrace: [ 44.365874][ C3] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.9.0-rc1-virtme #1 [ 44.366083][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.366495][ C3] Call Trace: [ 44.366616][ C3] [ 44.366689][ C3] dump_stack_lvl+0x82/0xd0 [ 44.366831][ C3] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 44.367010][ C3] ? common_startup_64+0x12c/0x138 [ 44.367227][ C3] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 44.367400][ C3] ? __pfx_usage_skip+0x10/0x10 [ 44.367546][ C3] ? __pfx_usage_match+0x10/0x10 [ 44.367689][ C3] ? arch_stack_walk+0x8c/0xf0 [ 44.367931][ C3] mark_lock_irq+0x4cd/0xa10 [ 44.368072][ C3] ? __pfx_mark_lock_irq+0x10/0x10 [ 44.368216][ C3] ? stack_trace_save+0x94/0xd0 [ 44.368354][ C3] ? add_chain_cache+0x248/0x8b0 [ 44.368568][ C3] ? save_trace+0x8f/0x5b0 [ 44.368703][ C3] mark_lock+0x28d/0x3e0 [ 44.368808][ C3] mark_usage+0xd9/0x2a0 [ 44.368917][ C3] __lock_acquire+0x797/0x1570 [ 44.369054][ C3] ? __lock_acquire+0xaf0/0x1570 [ 44.369289][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.369537][ C3] lock_acquire.part.0+0xeb/0x330 [ 44.369674][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.369967][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.370101][ C3] ? trace_lock_acquire+0x135/0x1c0 [ 44.370242][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.370459][ C3] ? lock_acquire+0x32/0xc0 [ 44.370752][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.370954][ C3] _raw_spin_lock+0x30/0x40 [ 44.371090][ C3] ? br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.371299][ C3] br_forward_delay_timer_expired+0x48/0x440 [bridge] [ 44.371577][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.371810][ C3] call_timer_fn+0x13b/0x230 [ 44.371948][ C3] ? call_timer_fn+0xe8/0x230 [ 44.372163][ C3] ? call_timer_fn+0xe8/0x230 [ 44.372300][ C3] ? __pfx_call_timer_fn+0x10/0x10 [ 44.372460][ C3] ? mark_lock+0x38/0x3e0 [ 44.372569][ C3] __run_timers+0x545/0x810 [ 44.372703][ C3] ? __pfx_br_forward_delay_timer_expired+0x10/0x10 [bridge] [ 44.373023][ C3] ? __pfx___run_timers+0x10/0x10 [ 44.373157][ C3] ? do_raw_spin_lock+0x131/0x270 [ 44.373299][ C3] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 44.373433][ C3] ? lock_acquire+0x32/0xc0 [ 44.373644][ C3] ? run_timer_softirq+0xe0/0x1b0 [ 44.373786][ C3] run_timer_softirq+0xe8/0x1b0 [ 44.373921][ C3] __do_softirq+0x1f8/0x5df [ 44.374056][ C3] irq_exit_rcu+0x97/0xc0 [ 44.374269][ C3] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.374406][ C3] [ 44.374476][ C3] [ 44.374544][ C3] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.374716][ C3] RIP: 0010:default_idle+0xf/0x20 [ 44.374865][ 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 [ 44.375346][ C3] RSP: 0018:ffffc9000016fdf8 EFLAGS: 00000246 [ 44.375600][ C3] RAX: 0000000000066bc3 RBX: 1ffff9200002dfc1 RCX: ffffffff9330e9d5 [ 44.375819][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff90caa4a4 [ 44.376021][ C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3709c [ 44.376308][ C3] R10: ffff8880361b84e3 R11: ffff8880361ad9b0 R12: 0000000000000000 [ 44.376510][ C3] R13: ffff888001b88040 R14: dffffc0000000000 R15: 0000000000000000 [ 44.376711][ C3] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 44.376924][ C3] ? cpuidle_idle_call+0x1f4/0x280 [ 44.377060][ C3] default_idle_call+0x6d/0xb0 [ 44.377194][ C3] cpuidle_idle_call+0x1f4/0x280 [ 44.377330][ C3] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 44.377543][ C3] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 44.377684][ C3] do_idle+0xf9/0x160 [ 44.377788][ C3] cpu_startup_entry+0x54/0x60 [ 44.377922][ C3] start_secondary+0x21c/0x2b0 [ 44.378141][ C3] ? __pfx_start_secondary+0x10/0x10 [ 44.378282][ C3] common_startup_64+0x12c/0x138 [ 44.378420][ C3] [ 45.509278][ T303] GACT probability NOT on [ 47.311954][ T310] br0: port 2(veth2) entered disabled state [ 47.645017][ T49] br0: port 2(veth2) entered blocking state [ 47.645250][ T49] br0: port 2(veth2) entered forwarding state [ 54.673037][ T327] br0: port 1(veth1) entered disabled state [ 54.765897][ T328] br0: port 2(veth2) entered disabled state [ 54.889179][ T329] veth2: left allmulticast mode [ 54.889348][ T329] veth2: left promiscuous mode [ 54.889598][ T329] br0: port 2(veth2) entered disabled state [ 54.890638][ T329] veth1: left allmulticast mode [ 54.890778][ T329] veth1: left promiscuous mode [ 54.891015][ T329] br0: port 1(veth1) entered disabled state