[ 34.606611][ C0] [ 34.606806][ C0] ======================================================== [ 34.607083][ C0] WARNING: possible irq lock inversion dependency detected [ 34.607347][ C0] 6.9.0-rc1-virtme #1 Not tainted [ 34.607515][ C0] -------------------------------------------------------- [ 34.607785][ C0] swapper/0/0 just changed the state of lock: [ 34.607993][ C0] ffff8880054ad580 (&ndev->lock){++-.}-{2:2}, at: addrconf_rs_timer+0xa9/0x730 [ 34.608321][ C0] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 34.608556][ C0] (&p->alloc_lock){+.+.}-{2:2} [ 34.608560][ C0] [ 34.608560][ C0] [ 34.608560][ C0] and interrupts could create inverse lock ordering between them. [ 34.608560][ C0] [ 34.609186][ C0] [ 34.609186][ C0] other info that might help us debug this: [ 34.609446][ C0] Possible interrupt unsafe locking scenario: [ 34.609446][ C0] [ 34.609689][ C0] CPU0 CPU1 [ 34.609857][ C0] ---- ---- [ 34.610015][ C0] lock(&p->alloc_lock); [ 34.610148][ C0] local_irq_disable(); [ 34.610366][ C0] lock(&ndev->lock); [ 34.610563][ C0] lock(&p->alloc_lock); [ 34.610761][ C0] [ 34.610886][ C0] lock(&ndev->lock); [ 34.611020][ C0] [ 34.611020][ C0] *** DEADLOCK *** [ 34.611020][ C0] [ 34.611254][ C0] 1 lock held by swapper/0/0: [ 34.611423][ C0] #0: ffffc90000007b68 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 34.611712][ C0] [ 34.611712][ C0] the shortest dependencies between 2nd lock and 1st lock: [ 34.612008][ C0] -> (&p->alloc_lock){+.+.}-{2:2} { [ 34.612168][ C0] HARDIRQ-ON-W at: [ 34.612297][ C0] __lock_acquire+0x797/0x1570 [ 34.612504][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.612695][ C0] _raw_spin_lock+0x30/0x40 [ 34.612888][ C0] set_mems_allowed+0x1d/0x210 [ 34.613089][ C0] kernel_init_freeable+0x72/0x310 [ 34.613312][ C0] kernel_init+0x20/0x200 [ 34.613533][ C0] ret_from_fork+0x31/0x70 [ 34.613754][ C0] ret_from_fork_asm+0x1a/0x30 [ 34.613977][ C0] SOFTIRQ-ON-W at: [ 34.614099][ C0] __lock_acquire+0x797/0x1570 [ 34.614300][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.614515][ C0] _raw_spin_lock+0x30/0x40 [ 34.614728][ C0] set_mems_allowed+0x1d/0x210 [ 34.614935][ C0] kernel_init_freeable+0x72/0x310 [ 34.615145][ C0] kernel_init+0x20/0x200 [ 34.615344][ C0] ret_from_fork+0x31/0x70 [ 34.615552][ C0] ret_from_fork_asm+0x1a/0x30 [ 34.615742][ C0] INITIAL USE at: [ 34.615857][ C0] __lock_acquire+0x797/0x1570 [ 34.616065][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.616273][ C0] _raw_spin_lock+0x30/0x40 [ 34.616464][ C0] set_mems_allowed+0x1d/0x210 [ 34.616660][ C0] kernel_init_freeable+0x72/0x310 [ 34.616857][ C0] kernel_init+0x20/0x200 [ 34.617083][ C0] ret_from_fork+0x31/0x70 [ 34.617294][ C0] ret_from_fork_asm+0x1a/0x30 [ 34.617496][ C0] } [ 34.617576][ C0] ... key at: [] __key.387+0x0/0x40 [ 34.617834][ C0] ... acquired at: [ 34.617954][ C0] __lock_acquire+0xaf0/0x1570 [ 34.618110][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.618260][ C0] _raw_spin_lock+0x30/0x40 [ 34.618415][ C0] __get_task_comm+0x27/0x70 [ 34.618576][ C0] ref_tracker_alloc+0x2ee/0x490 [ 34.618732][ C0] netdev_get_by_index+0x5e/0x80 [ 34.618884][ C0] fib6_nh_init+0x3d8/0x15b0 [ 34.619049][ C0] ip6_route_info_create+0xf18/0x17d0 [ 34.619198][ C0] addrconf_f6i_alloc+0x265/0x560 [ 34.619355][ C0] __ipv6_dev_ac_inc+0x25f/0xb10 [ 34.619510][ C0] addrconf_join_anycast+0x1c0/0x220 [ 34.619676][ C0] dev_forward_change+0x2a6/0x7b0 [ 34.619830][ C0] addrconf_fixup_forwarding+0x23f/0x460 [ 34.620035][ C0] addrconf_sysctl_forward+0x212/0x2b0 [ 34.620189][ C0] proc_sys_call_handler+0x403/0x5e0 [ 34.620342][ C0] vfs_write+0x9e5/0x10a0 [ 34.620503][ C0] ksys_write+0xf5/0x1e0 [ 34.620661][ C0] do_syscall_64+0xc6/0x1e0 [ 34.620820][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 34.621029][ C0] [ 34.621113][ C0] -> (&ndev->lock){++-.}-{2:2} { [ 34.621277][ C0] HARDIRQ-ON-W at: [ 34.621398][ C0] __lock_acquire+0x797/0x1570 [ 34.621591][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.621807][ C0] _raw_write_lock_bh+0x38/0x50 [ 34.622016][ C0] addrconf_permanent_addr+0x6e/0x670 [ 34.622218][ C0] addrconf_notify+0x749/0xd60 [ 34.622406][ C0] notifier_call_chain+0xcd/0x150 [ 34.622599][ C0] __dev_notify_flags+0xe6/0x250 [ 34.622791][ C0] dev_change_flags+0xec/0x160 [ 34.622999][ C0] do_setlink+0x7d6/0x21e0 [ 34.623188][ C0] __rtnl_newlink+0xaa7/0xd80 [ 34.623381][ C0] rtnl_newlink+0x63/0xa0 [ 34.623581][ C0] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 34.623772][ C0] netlink_rcv_skb+0x130/0x360 [ 34.623992][ C0] netlink_unicast+0x449/0x710 [ 34.624183][ C0] netlink_sendmsg+0x723/0xbe0 [ 34.624377][ C0] ____sys_sendmsg+0x7b2/0xa10 [ 34.624612][ C0] ___sys_sendmsg+0xee/0x170 [ 34.624823][ C0] __sys_sendmsg+0xcd/0x170 [ 34.625037][ C0] do_syscall_64+0xc6/0x1e0 [ 34.625245][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 34.625490][ C0] HARDIRQ-ON-R at: [ 34.625622][ C0] __lock_acquire+0x797/0x1570 [ 34.625815][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.626006][ C0] _raw_read_lock_bh+0x44/0x80 [ 34.626233][ C0] inet6_fill_ifla6_attrs+0x516/0x740 [ 34.626449][ C0] inet6_fill_link_af+0x5e/0xe0 [ 34.626664][ C0] rtnl_fill_ifinfo+0x1612/0x29e0 [ 34.626878][ C0] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 34.627074][ C0] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 34.627330][ C0] rtmsg_ifinfo+0x5b/0xa0 [ 34.627529][ C0] register_netdevice+0x1177/0x1690 [ 34.627734][ C0] register_netdev+0x20/0x40 [ 34.627935][ C0] sit_init_net+0x250/0x4f0 [ 34.628138][ C0] ops_init+0x9b/0x560 [ 34.628306][ C0] register_pernet_operations+0x2db/0x710 [ 34.628555][ C0] register_pernet_device+0x2a/0x60 [ 34.628762][ C0] sit_init+0x23/0xe0 [ 34.628916][ C0] do_one_initcall+0x8d/0x1e0 [ 34.629120][ C0] do_initcalls+0x1b2/0x3e0 [ 34.629328][ C0] kernel_init_freeable+0x232/0x310 [ 34.629532][ C0] kernel_init+0x20/0x200 [ 34.629730][ C0] ret_from_fork+0x31/0x70 [ 34.629928][ C0] ret_from_fork_asm+0x1a/0x30 [ 34.630129][ C0] IN-SOFTIRQ-W at: [ 34.630290][ C0] __lock_acquire+0x797/0x1570 [ 34.630553][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.630748][ C0] _raw_write_lock+0x30/0x40 [ 34.630942][ C0] addrconf_rs_timer+0xa9/0x730 [ 34.631139][ C0] call_timer_fn+0x13b/0x230 [ 34.631349][ C0] __run_timers+0x545/0x810 [ 34.631560][ C0] timer_expire_remote+0x9b/0xe0 [ 34.631781][ C0] tmigr_handle_remote_cpu+0x270/0x430 [ 34.631985][ C0] tmigr_handle_remote_up+0x19f/0x2e0 [ 34.632193][ C0] tmigr_handle_remote+0x21d/0x3a0 [ 34.632412][ C0] __do_softirq+0x1f8/0x5df [ 34.632611][ C0] irq_exit_rcu+0x97/0xc0 [ 34.632817][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 34.633046][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 34.633287][ C0] default_idle+0xf/0x20 [ 34.633496][ C0] default_idle_call+0x6d/0xb0 [ 34.633695][ C0] cpuidle_idle_call+0x1f4/0x280 [ 34.633896][ C0] do_idle+0xf9/0x160 [ 34.634052][ C0] cpu_startup_entry+0x54/0x60 [ 34.634273][ C0] rest_init+0x14f/0x260 [ 34.634495][ C0] start_kernel+0x318/0x3d0 [ 34.634708][ C0] x86_64_start_reservations+0x18/0x30 [ 34.634897][ C0] x86_64_start_kernel+0xba/0x110 [ 34.635100][ C0] common_startup_64+0x12c/0x138 [ 34.635315][ C0] INITIAL USE at: [ 34.635432][ C0] __lock_acquire+0x797/0x1570 [ 34.635634][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.635865][ C0] _raw_write_lock_bh+0x38/0x50 [ 34.636087][ C0] addrconf_permanent_addr+0x6e/0x670 [ 34.636279][ C0] addrconf_notify+0x749/0xd60 [ 34.636465][ C0] notifier_call_chain+0xcd/0x150 [ 34.636670][ C0] __dev_notify_flags+0xe6/0x250 [ 34.636866][ C0] dev_change_flags+0xec/0x160 [ 34.637054][ C0] do_setlink+0x7d6/0x21e0 [ 34.637261][ C0] __rtnl_newlink+0xaa7/0xd80 [ 34.637470][ C0] rtnl_newlink+0x63/0xa0 [ 34.637675][ C0] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 34.637893][ C0] netlink_rcv_skb+0x130/0x360 [ 34.638101][ C0] netlink_unicast+0x449/0x710 [ 34.638349][ C0] netlink_sendmsg+0x723/0xbe0 [ 34.638542][ C0] ____sys_sendmsg+0x7b2/0xa10 [ 34.638728][ C0] ___sys_sendmsg+0xee/0x170 [ 34.638919][ C0] __sys_sendmsg+0xcd/0x170 [ 34.639127][ C0] do_syscall_64+0xc6/0x1e0 [ 34.639421][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 34.639763][ C0] INITIAL READ USE at: [ 34.639933][ C0] __lock_acquire+0x797/0x1570 [ 34.640231][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.640542][ C0] _raw_read_lock_bh+0x44/0x80 [ 34.640853][ C0] inet6_fill_ifla6_attrs+0x516/0x740 [ 34.641236][ C0] inet6_fill_link_af+0x5e/0xe0 [ 34.641539][ C0] rtnl_fill_ifinfo+0x1612/0x29e0 [ 34.641855][ C0] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 34.642220][ C0] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 34.642583][ C0] rtmsg_ifinfo+0x5b/0xa0 [ 34.642894][ C0] register_netdevice+0x1177/0x1690 [ 34.643253][ C0] register_netdev+0x20/0x40 [ 34.643504][ C0] sit_init_net+0x250/0x4f0 [ 34.643717][ C0] ops_init+0x9b/0x560 [ 34.643908][ C0] register_pernet_operations+0x2db/0x710 [ 34.644136][ C0] register_pernet_device+0x2a/0x60 [ 34.644367][ C0] sit_init+0x23/0xe0 [ 34.644564][ C0] do_one_initcall+0x8d/0x1e0 [ 34.644763][ C0] do_initcalls+0x1b2/0x3e0 [ 34.644955][ C0] kernel_init_freeable+0x232/0x310 [ 34.645178][ C0] kernel_init+0x20/0x200 [ 34.645373][ C0] ret_from_fork+0x31/0x70 [ 34.645565][ C0] ret_from_fork_asm+0x1a/0x30 [ 34.645772][ C0] } [ 34.645850][ C0] ... key at: [] __key.37+0x0/0x40 [ 34.646077][ C0] ... acquired at: [ 34.646190][ C0] mark_lock+0x28d/0x3e0 [ 34.646343][ C0] mark_usage+0xd9/0x2a0 [ 34.646496][ C0] __lock_acquire+0x797/0x1570 [ 34.646654][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.646806][ C0] _raw_write_lock+0x30/0x40 [ 34.646969][ C0] addrconf_rs_timer+0xa9/0x730 [ 34.647120][ C0] call_timer_fn+0x13b/0x230 [ 34.647276][ C0] __run_timers+0x545/0x810 [ 34.647425][ C0] timer_expire_remote+0x9b/0xe0 [ 34.647578][ C0] tmigr_handle_remote_cpu+0x270/0x430 [ 34.647732][ C0] tmigr_handle_remote_up+0x19f/0x2e0 [ 34.647880][ C0] tmigr_handle_remote+0x21d/0x3a0 [ 34.648029][ C0] __do_softirq+0x1f8/0x5df [ 34.648185][ C0] irq_exit_rcu+0x97/0xc0 [ 34.648341][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 34.648528][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 34.648723][ C0] default_idle+0xf/0x20 [ 34.648875][ C0] default_idle_call+0x6d/0xb0 [ 34.649024][ C0] cpuidle_idle_call+0x1f4/0x280 [ 34.649176][ C0] do_idle+0xf9/0x160 [ 34.649289][ C0] cpu_startup_entry+0x54/0x60 [ 34.649441][ C0] rest_init+0x14f/0x260 [ 34.649613][ C0] start_kernel+0x318/0x3d0 [ 34.649807][ C0] x86_64_start_reservations+0x18/0x30 [ 34.649961][ C0] x86_64_start_kernel+0xba/0x110 [ 34.650110][ C0] common_startup_64+0x12c/0x138 [ 34.650263][ C0] [ 34.650340][ C0] [ 34.650340][ C0] stack backtrace: [ 34.650529][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.9.0-rc1-virtme #1 [ 34.650769][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 34.651109][ C0] Call Trace: [ 34.651223][ C0] [ 34.651302][ C0] dump_stack_lvl+0x82/0xd0 [ 34.651457][ C0] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 34.651653][ C0] ? kernel_text_address+0x17/0xe0 [ 34.651822][ C0] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 34.652026][ C0] ? __pfx_usage_skip+0x10/0x10 [ 34.652177][ C0] ? __pfx_usage_match+0x10/0x10 [ 34.652404][ C0] ? arch_stack_walk+0x8c/0xf0 [ 34.652557][ C0] mark_lock_irq+0x4cd/0xa10 [ 34.652759][ C0] ? common_startup_64+0x12c/0x138 [ 34.652912][ C0] ? __pfx_mark_lock_irq+0x10/0x10 [ 34.653065][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 34.653217][ C0] ? save_trace+0x8f/0x5b0 [ 34.653373][ C0] mark_lock+0x28d/0x3e0 [ 34.653486][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 34.653645][ C0] mark_usage+0xd9/0x2a0 [ 34.653759][ C0] __lock_acquire+0x797/0x1570 [ 34.653909][ C0] ? __pfx_validate_chain+0x10/0x10 [ 34.654066][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 34.654217][ C0] lock_acquire.part.0+0xeb/0x330 [ 34.654371][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 34.654519][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 34.654681][ C0] ? trace_lock_acquire+0x135/0x1c0 [ 34.654830][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 34.654983][ C0] ? lock_acquire+0x32/0xc0 [ 34.655134][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 34.655283][ C0] _raw_write_lock+0x30/0x40 [ 34.655435][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 34.655596][ C0] addrconf_rs_timer+0xa9/0x730 [ 34.655745][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 34.655898][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 34.656048][ C0] ? call_timer_fn+0xe8/0x230 [ 34.656196][ C0] ? lock_acquire+0x32/0xc0 [ 34.656350][ C0] ? call_timer_fn+0xe8/0x230 [ 34.656498][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 34.656652][ C0] call_timer_fn+0x13b/0x230 [ 34.656801][ C0] ? call_timer_fn+0xe8/0x230 [ 34.656951][ C0] ? call_timer_fn+0xe8/0x230 [ 34.657101][ C0] ? __pfx_call_timer_fn+0x10/0x10 [ 34.657257][ C0] ? mark_lock+0x38/0x3e0 [ 34.657375][ C0] __run_timers+0x545/0x810 [ 34.657529][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 34.657697][ C0] ? __pfx___run_timers+0x10/0x10 [ 34.657848][ C0] ? __lock_release+0x103/0x460 [ 34.658005][ C0] ? do_raw_spin_lock+0x131/0x270 [ 34.658159][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 34.658311][ C0] ? lock_acquire+0x32/0xc0 [ 34.658464][ C0] ? timer_expire_remote+0x93/0xe0 [ 34.658622][ C0] timer_expire_remote+0x9b/0xe0 [ 34.658772][ C0] tmigr_handle_remote_cpu+0x270/0x430 [ 34.658925][ C0] ? __pfx_tmigr_handle_remote_cpu+0x10/0x10 [ 34.659116][ C0] tmigr_handle_remote_up+0x19f/0x2e0 [ 34.659272][ C0] tmigr_handle_remote+0x21d/0x3a0 [ 34.659419][ C0] ? do_raw_spin_lock+0x131/0x270 [ 34.659569][ C0] ? __pfx_tmigr_handle_remote+0x10/0x10 [ 34.659732][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 34.659882][ C0] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 34.660068][ C0] __do_softirq+0x1f8/0x5df [ 34.660221][ C0] irq_exit_rcu+0x97/0xc0 [ 34.660334][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 34.660482][ C0] [ 34.660563][ C0] [ 34.660645][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 34.660838][ C0] RIP: 0010:default_idle+0xf/0x20 [ 34.660994][ C0] 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 [ 34.661536][ C0] RSP: 0018:ffffffffa8c07e00 EFLAGS: 00000242 [ 34.661781][ C0] RAX: 00000000000954f1 RBX: 1ffffffff5180fc2 RCX: ffffffffa7d0e9d5 [ 34.662028][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa56aa4a4 [ 34.662278][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0709c [ 34.662518][ C0] R10: ffff8880360384e3 R11: ffff88803602d9b0 R12: 0000000000000000 [ 34.662761][ C0] R13: ffffffffa8c1d000 R14: dffffc0000000000 R15: 0000000000014770 [ 34.663008][ C0] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 34.663174][ C0] ? cpuidle_idle_call+0x1f4/0x280 [ 34.663338][ C0] default_idle_call+0x6d/0xb0 [ 34.663497][ C0] cpuidle_idle_call+0x1f4/0x280 [ 34.663669][ C0] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 34.663830][ C0] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 34.663994][ C0] do_idle+0xf9/0x160 [ 34.664116][ C0] cpu_startup_entry+0x54/0x60 [ 34.664291][ C0] rest_init+0x14f/0x260 [ 34.664419][ C0] start_kernel+0x318/0x3d0 [ 34.664593][ C0] x86_64_start_reservations+0x18/0x30 [ 34.664759][ C0] x86_64_start_kernel+0xba/0x110 [ 34.664924][ C0] common_startup_64+0x12c/0x138 [ 34.665095][ C0]