[ 30.311747][ C2] [ 30.311958][ C2] ======================================================== [ 30.312163][ C2] WARNING: possible irq lock inversion dependency detected [ 30.312360][ C2] 6.9.0-rc1-virtme #1 Not tainted [ 30.312493][ C2] -------------------------------------------------------- [ 30.312693][ C2] swapper/2/0 just changed the state of lock: [ 30.312880][ C2] ffff888006910d80 (&ndev->lock){++-.}-{2:2}, at: addrconf_rs_timer+0xa9/0x730 [ 30.313129][ C2] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 30.313323][ C2] (&p->alloc_lock){+.+.}-{2:2} [ 30.313327][ C2] [ 30.313327][ C2] [ 30.313327][ C2] and interrupts could create inverse lock ordering between them. [ 30.313327][ C2] [ 30.313833][ C2] [ 30.313833][ C2] other info that might help us debug this: [ 30.314026][ C2] Possible interrupt unsafe locking scenario: [ 30.314026][ C2] [ 30.314228][ C2] CPU0 CPU1 [ 30.314359][ C2] ---- ---- [ 30.314492][ C2] lock(&p->alloc_lock); [ 30.314600][ C2] local_irq_disable(); [ 30.314774][ C2] lock(&ndev->lock); [ 30.314940][ C2] lock(&p->alloc_lock); [ 30.315109][ C2] [ 30.315210][ C2] lock(&ndev->lock); [ 30.315312][ C2] [ 30.315312][ C2] *** DEADLOCK *** [ 30.315312][ C2] [ 30.315506][ C2] 1 lock held by swapper/2/0: [ 30.315640][ C2] #0: ffffc90000230b68 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 30.315888][ C2] [ 30.315888][ C2] the shortest dependencies between 2nd lock and 1st lock: [ 30.316181][ C2] -> (&p->alloc_lock){+.+.}-{2:2} { [ 30.316321][ C2] HARDIRQ-ON-W at: [ 30.316422][ C2] __lock_acquire+0x797/0x1570 [ 30.316602][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.316780][ C2] _raw_spin_lock+0x30/0x40 [ 30.316952][ C2] set_mems_allowed+0x1d/0x210 [ 30.317125][ C2] kernel_init_freeable+0x72/0x310 [ 30.317295][ C2] kernel_init+0x20/0x200 [ 30.317466][ C2] ret_from_fork+0x31/0x70 [ 30.317637][ C2] ret_from_fork_asm+0x1a/0x30 [ 30.317819][ C2] SOFTIRQ-ON-W at: [ 30.317919][ C2] __lock_acquire+0x797/0x1570 [ 30.318087][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.318259][ C2] _raw_spin_lock+0x30/0x40 [ 30.318432][ C2] set_mems_allowed+0x1d/0x210 [ 30.318599][ C2] kernel_init_freeable+0x72/0x310 [ 30.318776][ C2] kernel_init+0x20/0x200 [ 30.318945][ C2] ret_from_fork+0x31/0x70 [ 30.319114][ C2] ret_from_fork_asm+0x1a/0x30 [ 30.319283][ C2] INITIAL USE at: [ 30.319389][ C2] __lock_acquire+0x797/0x1570 [ 30.319741][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.319940][ C2] _raw_spin_lock+0x30/0x40 [ 30.320112][ C2] set_mems_allowed+0x1d/0x210 [ 30.320285][ C2] kernel_init_freeable+0x72/0x310 [ 30.320459][ C2] kernel_init+0x20/0x200 [ 30.320629][ C2] ret_from_fork+0x31/0x70 [ 30.320810][ C2] ret_from_fork_asm+0x1a/0x30 [ 30.320980][ C2] } [ 30.321050][ C2] ... key at: [] __key.388+0x0/0x40 [ 30.321253][ C2] ... acquired at: [ 30.321353][ C2] __lock_acquire+0xaf0/0x1570 [ 30.321496][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.321630][ C2] _raw_spin_lock+0x30/0x40 [ 30.321776][ C2] __get_task_comm+0x27/0x70 [ 30.321913][ C2] ref_tracker_alloc+0x2ee/0x490 [ 30.322056][ C2] netdev_get_by_index+0x5e/0x80 [ 30.322188][ C2] fib6_nh_init+0x3d8/0x1580 [ 30.322322][ C2] ip6_route_info_create+0xf18/0x17d0 [ 30.322454][ C2] addrconf_f6i_alloc+0x265/0x560 [ 30.322588][ C2] __ipv6_dev_ac_inc+0x25f/0xb10 [ 30.322723][ C2] addrconf_join_anycast+0x1c0/0x220 [ 30.322871][ C2] dev_forward_change+0x2a6/0x7b0 [ 30.323003][ C2] addrconf_fixup_forwarding+0x23f/0x460 [ 30.323169][ C2] addrconf_sysctl_forward+0x212/0x2b0 [ 30.323303][ C2] proc_sys_call_handler+0x403/0x5e0 [ 30.323435][ C2] vfs_write+0x9e5/0x10a0 [ 30.323580][ C2] ksys_write+0xf5/0x1e0 [ 30.323716][ C2] do_syscall_64+0xc6/0x1e0 [ 30.323860][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.324025][ C2] [ 30.324092][ C2] -> (&ndev->lock){++-.}-{2:2} { [ 30.324230][ C2] HARDIRQ-ON-W at: [ 30.324331][ C2] __lock_acquire+0x797/0x1570 [ 30.324510][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.324677][ C2] _raw_write_lock_bh+0x38/0x50 [ 30.324851][ C2] addrconf_permanent_addr+0x6e/0x670 [ 30.325020][ C2] addrconf_notify+0x749/0xd60 [ 30.325187][ C2] notifier_call_chain+0xcd/0x150 [ 30.325359][ C2] __dev_notify_flags+0xe6/0x250 [ 30.325530][ C2] dev_change_flags+0xec/0x160 [ 30.325695][ C2] do_setlink+0x7d6/0x21e0 [ 30.325878][ C2] __rtnl_newlink+0xaa7/0xd80 [ 30.326056][ C2] rtnl_newlink+0x63/0xa0 [ 30.326227][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 30.326393][ C2] netlink_rcv_skb+0x130/0x360 [ 30.326561][ C2] netlink_unicast+0x449/0x710 [ 30.326733][ C2] netlink_sendmsg+0x723/0xbe0 [ 30.326907][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 30.327076][ C2] ___sys_sendmsg+0xee/0x170 [ 30.327242][ C2] __sys_sendmsg+0xcd/0x170 [ 30.327411][ C2] do_syscall_64+0xc6/0x1e0 [ 30.327577][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.327781][ C2] HARDIRQ-ON-R at: [ 30.327883][ C2] __lock_acquire+0x797/0x1570 [ 30.328057][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.328224][ C2] _raw_read_lock_bh+0x44/0x80 [ 30.328390][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 30.328559][ C2] inet6_fill_link_af+0x5e/0xe0 [ 30.328725][ C2] rtnl_fill_ifinfo+0x1615/0x2a90 [ 30.328901][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 30.329072][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 30.329271][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 30.329436][ C2] register_netdevice+0x1177/0x1690 [ 30.329608][ C2] register_netdev+0x20/0x40 [ 30.329782][ C2] vti6_init_net+0x25d/0x380 [ 30.329950][ C2] ops_init+0x9b/0x560 [ 30.330084][ C2] register_pernet_operations+0x2db/0x710 [ 30.330291][ C2] register_pernet_device+0x2a/0x60 [ 30.330459][ C2] vti6_tunnel_init+0x18/0x110 [ 30.330627][ C2] do_one_initcall+0x8d/0x1e0 [ 30.330805][ C2] do_initcalls+0x1b2/0x3e0 [ 30.330973][ C2] kernel_init_freeable+0x232/0x310 [ 30.331140][ C2] kernel_init+0x20/0x200 [ 30.331315][ C2] ret_from_fork+0x31/0x70 [ 30.331487][ C2] ret_from_fork_asm+0x1a/0x30 [ 30.331734][ C2] IN-SOFTIRQ-W at: [ 30.331889][ C2] __lock_acquire+0x797/0x1570 [ 30.332073][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.332240][ C2] _raw_write_lock+0x30/0x40 [ 30.332412][ C2] addrconf_rs_timer+0xa9/0x730 [ 30.332582][ C2] call_timer_fn+0x13b/0x230 [ 30.332761][ C2] __run_timers+0x545/0x810 [ 30.332928][ C2] timer_expire_remote+0x9b/0xe0 [ 30.333095][ C2] tmigr_handle_remote_cpu+0x270/0x430 [ 30.333270][ C2] tmigr_handle_remote_up+0x19f/0x2e0 [ 30.333436][ C2] tmigr_handle_remote+0x21d/0x3a0 [ 30.333604][ C2] __do_softirq+0x1f8/0x5df [ 30.333786][ C2] irq_exit_rcu+0x97/0xc0 [ 30.333965][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.334166][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.334369][ C2] default_idle+0xf/0x20 [ 30.334536][ C2] default_idle_call+0x6d/0xb0 [ 30.334704][ C2] cpuidle_idle_call+0x1f4/0x280 [ 30.334881][ C2] do_idle+0xf9/0x160 [ 30.335017][ C2] cpu_startup_entry+0x54/0x60 [ 30.335183][ C2] start_secondary+0x21c/0x2b0 [ 30.335351][ C2] common_startup_64+0x12c/0x138 [ 30.335520][ C2] INITIAL USE at: [ 30.335621][ C2] __lock_acquire+0x797/0x1570 [ 30.335805][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.335992][ C2] _raw_write_lock_bh+0x38/0x50 [ 30.336162][ C2] addrconf_permanent_addr+0x6e/0x670 [ 30.336332][ C2] addrconf_notify+0x749/0xd60 [ 30.336498][ C2] notifier_call_chain+0xcd/0x150 [ 30.336672][ C2] __dev_notify_flags+0xe6/0x250 [ 30.336851][ C2] dev_change_flags+0xec/0x160 [ 30.337017][ C2] do_setlink+0x7d6/0x21e0 [ 30.337183][ C2] __rtnl_newlink+0xaa7/0xd80 [ 30.337434][ C2] rtnl_newlink+0x63/0xa0 [ 30.337606][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 30.337782][ C2] netlink_rcv_skb+0x130/0x360 [ 30.337950][ C2] netlink_unicast+0x449/0x710 [ 30.338216][ C2] netlink_sendmsg+0x723/0xbe0 [ 30.338383][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 30.338553][ C2] ___sys_sendmsg+0xee/0x170 [ 30.338821][ C2] __sys_sendmsg+0xcd/0x170 [ 30.338989][ C2] do_syscall_64+0xc6/0x1e0 [ 30.339155][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.339438][ C2] INITIAL READ USE at: [ 30.339542][ C2] __lock_acquire+0x797/0x1570 [ 30.339710][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.339883][ C2] _raw_read_lock_bh+0x44/0x80 [ 30.340130][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 30.340330][ C2] inet6_fill_link_af+0x5e/0xe0 [ 30.340504][ C2] rtnl_fill_ifinfo+0x1615/0x2a90 [ 30.340763][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 30.340962][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 30.341161][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 30.341327][ C2] register_netdevice+0x1177/0x1690 [ 30.341527][ C2] register_netdev+0x20/0x40 [ 30.341695][ C2] vti6_init_net+0x25d/0x380 [ 30.341955][ C2] ops_init+0x9b/0x560 [ 30.342121][ C2] register_pernet_operations+0x2db/0x710 [ 30.342324][ C2] register_pernet_device+0x2a/0x60 [ 30.342602][ C2] vti6_tunnel_init+0x18/0x110 [ 30.342778][ C2] do_one_initcall+0x8d/0x1e0 [ 30.342948][ C2] do_initcalls+0x1b2/0x3e0 [ 30.343114][ C2] kernel_init_freeable+0x232/0x310 [ 30.343394][ C2] kernel_init+0x20/0x200 [ 30.343562][ C2] ret_from_fork+0x31/0x70 [ 30.343732][ C2] ret_from_fork_asm+0x1a/0x30 [ 30.343985][ C2] } [ 30.344053][ C2] ... key at: [] __key.37+0x0/0x40 [ 30.344256][ C2] ... acquired at: [ 30.344355][ C2] mark_lock+0x28d/0x3e0 [ 30.344567][ C2] mark_usage+0xd9/0x2a0 [ 30.344700][ C2] __lock_acquire+0x797/0x1570 [ 30.344840][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.344972][ C2] _raw_write_lock+0x30/0x40 [ 30.345103][ C2] addrconf_rs_timer+0xa9/0x730 [ 30.345317][ C2] call_timer_fn+0x13b/0x230 [ 30.345451][ C2] __run_timers+0x545/0x810 [ 30.345583][ C2] timer_expire_remote+0x9b/0xe0 [ 30.345715][ C2] tmigr_handle_remote_cpu+0x270/0x430 [ 30.345938][ C2] tmigr_handle_remote_up+0x19f/0x2e0 [ 30.346079][ C2] tmigr_handle_remote+0x21d/0x3a0 [ 30.346213][ C2] __do_softirq+0x1f8/0x5df [ 30.346345][ C2] irq_exit_rcu+0x97/0xc0 [ 30.346557][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.346779][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.347034][ C2] default_idle+0xf/0x20 [ 30.347178][ C2] default_idle_call+0x6d/0xb0 [ 30.347394][ C2] cpuidle_idle_call+0x1f4/0x280 [ 30.347527][ C2] do_idle+0xf9/0x160 [ 30.347628][ C2] cpu_startup_entry+0x54/0x60 [ 30.347769][ C2] start_secondary+0x21c/0x2b0 [ 30.347980][ C2] common_startup_64+0x12c/0x138 [ 30.348116][ C2] [ 30.348183][ C2] [ 30.348183][ C2] stack backtrace: [ 30.348347][ C2] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.9.0-rc1-virtme #1 [ 30.348622][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 30.348921][ C2] Call Trace: [ 30.349026][ C2] [ 30.349097][ C2] dump_stack_lvl+0x82/0xd0 [ 30.349321][ C2] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 30.349486][ C2] ? kernel_text_address+0x17/0xe0 [ 30.349620][ C2] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 30.349793][ C2] ? __pfx_usage_skip+0x10/0x10 [ 30.350081][ C2] ? __pfx_usage_match+0x10/0x10 [ 30.350221][ C2] ? arch_stack_walk+0x8c/0xf0 [ 30.350356][ C2] mark_lock_irq+0x4cd/0xa10 [ 30.350489][ C2] ? common_startup_64+0x12c/0x138 [ 30.350701][ C2] ? __pfx_mark_lock_irq+0x10/0x10 [ 30.350844][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 30.350978][ C2] ? save_trace+0x8f/0x5b0 [ 30.351111][ C2] mark_lock+0x28d/0x3e0 [ 30.351213][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 30.351422][ C2] mark_usage+0xd9/0x2a0 [ 30.351522][ C2] __lock_acquire+0x797/0x1570 [ 30.351656][ C2] ? __pfx_validate_chain+0x10/0x10 [ 30.351798][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 30.352007][ C2] lock_acquire.part.0+0xeb/0x330 [ 30.352141][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 30.352273][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.352405][ C2] ? trace_lock_acquire+0x135/0x1c0 [ 30.352615][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 30.352750][ C2] ? lock_acquire+0x32/0xc0 [ 30.352882][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 30.353018][ C2] _raw_write_lock+0x30/0x40 [ 30.353153][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 30.353360][ C2] addrconf_rs_timer+0xa9/0x730 [ 30.353492][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.353624][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 30.353765][ C2] ? call_timer_fn+0xe8/0x230 [ 30.353975][ C2] ? lock_acquire+0x32/0xc0 [ 30.354111][ C2] ? call_timer_fn+0xe8/0x230 [ 30.354243][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 30.354377][ C2] call_timer_fn+0x13b/0x230 [ 30.354585][ C2] ? call_timer_fn+0xe8/0x230 [ 30.354717][ C2] ? call_timer_fn+0xe8/0x230 [ 30.354865][ C2] ? __pfx_call_timer_fn+0x10/0x10 [ 30.355000][ C2] ? mark_lock+0x38/0x3e0 [ 30.355104][ C2] __run_timers+0x545/0x810 [ 30.355314][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 30.355447][ C2] ? __pfx___run_timers+0x10/0x10 [ 30.355582][ C2] ? __lock_release+0x103/0x460 [ 30.355715][ C2] ? do_raw_spin_lock+0x131/0x270 [ 30.355941][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 30.356075][ C2] ? lock_acquire+0x32/0xc0 [ 30.356206][ C2] ? timer_expire_remote+0x93/0xe0 [ 30.356340][ C2] timer_expire_remote+0x9b/0xe0 [ 30.356552][ C2] tmigr_handle_remote_cpu+0x270/0x430 [ 30.356684][ C2] ? __pfx_tmigr_handle_remote_cpu+0x10/0x10 [ 30.356861][ C2] tmigr_handle_remote_up+0x19f/0x2e0 [ 30.356996][ C2] tmigr_handle_remote+0x21d/0x3a0 [ 30.357207][ C2] ? __pfx_tmigr_handle_remote+0x10/0x10 [ 30.357341][ C2] __do_softirq+0x1f8/0x5df [ 30.357475][ C2] irq_exit_rcu+0x97/0xc0 [ 30.357575][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.357709][ C2] [ 30.357861][ C2] [ 30.357931][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.358103][ C2] RIP: 0010:default_idle+0xf/0x20 [ 30.358244][ C2] 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 d3 eb 32 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 30.358832][ C2] RSP: 0018:ffffc9000015fdf8 EFLAGS: 00000246 [ 30.359099][ C2] RAX: 00000000000ca4c3 RBX: 1ffff9200002bfc1 RCX: ffffffffad332ea5 [ 30.359413][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffaaaac1d4 [ 30.359612][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2709c [ 30.359818][ C2] R10: ffff8880361384e3 R11: ffff88803613de40 R12: 0000000000000000 [ 30.360100][ C2] R13: ffff888001b8c5c0 R14: dffffc0000000000 R15: 0000000000000000 [ 30.360300][ C2] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 30.360438][ C2] ? cpuidle_idle_call+0x1f4/0x280 [ 30.360733][ C2] default_idle_call+0x6d/0xb0 [ 30.360871][ C2] cpuidle_idle_call+0x1f4/0x280 [ 30.361006][ C2] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 30.361138][ C2] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 30.361273][ C2] do_idle+0xf9/0x160 [ 30.361374][ C2] cpu_startup_entry+0x54/0x60 [ 30.361506][ C2] start_secondary+0x21c/0x2b0 [ 30.361641][ C2] ? __pfx_start_secondary+0x10/0x10 [ 30.361781][ C2] common_startup_64+0x12c/0x138 [ 30.361996][ C2]