[ 108.203721][ T1409] [ 108.203843][ T1409] ===================================================== [ 108.204029][ T1409] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 108.204250][ T1409] 6.9.0-rc1-virtme #1 Not tainted [ 108.204400][ T1409] ----------------------------------------------------- [ 108.204588][ T1409] sysctl/1409 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 108.204809][ T1409] ffff888006242c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 108.205081][ T1409] [ 108.205081][ T1409] and this task is already holding: [ 108.205296][ T1409] ffff88800284bd80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 108.205567][ T1409] which would create a new lock dependency: [ 108.205747][ T1409] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 108.206002][ T1409] [ 108.206002][ T1409] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 108.206255][ T1409] (&ndev->lock){++--}-{2:2} [ 108.206259][ T1409] [ 108.206259][ T1409] ... which became SOFTIRQ-irq-safe at: [ 108.206619][ T1409] __lock_acquire+0x797/0x1570 [ 108.206777][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.206924][ T1409] _raw_write_lock+0x30/0x40 [ 108.207078][ T1409] addrconf_rs_timer+0xa9/0x730 [ 108.207226][ T1409] call_timer_fn+0x13b/0x230 [ 108.207376][ T1409] __run_timers+0x545/0x810 [ 108.207523][ T1409] run_timer_softirq+0xe8/0x1b0 [ 108.207673][ T1409] __do_softirq+0x1f8/0x5df [ 108.207819][ T1409] irq_exit_rcu+0x97/0xc0 [ 108.207967][ T1409] sysvec_apic_timer_interrupt+0x75/0x80 [ 108.208116][ T1409] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 108.208301][ T1409] default_idle+0xf/0x20 [ 108.208412][ T1409] default_idle_call+0x6d/0xb0 [ 108.208558][ T1409] cpuidle_idle_call+0x1f4/0x280 [ 108.208707][ T1409] do_idle+0xf9/0x160 [ 108.208820][ T1409] cpu_startup_entry+0x54/0x60 [ 108.208968][ T1409] rest_init+0x14f/0x260 [ 108.209079][ T1409] start_kernel+0x318/0x3d0 [ 108.209227][ T1409] x86_64_start_reservations+0x18/0x30 [ 108.209379][ T1409] x86_64_start_kernel+0xba/0x110 [ 108.209530][ T1409] common_startup_64+0x12c/0x138 [ 108.209678][ T1409] [ 108.209678][ T1409] to a SOFTIRQ-irq-unsafe lock: [ 108.209861][ T1409] (&p->alloc_lock){+.+.}-{2:2} [ 108.209866][ T1409] [ 108.209866][ T1409] ... which became SOFTIRQ-irq-unsafe at: [ 108.210252][ T1409] ... [ 108.210254][ T1409] __lock_acquire+0x797/0x1570 [ 108.210485][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.210632][ T1409] _raw_spin_lock+0x30/0x40 [ 108.210780][ T1409] set_mems_allowed+0x1d/0x210 [ 108.210930][ T1409] kernel_init_freeable+0x72/0x310 [ 108.211086][ T1409] kernel_init+0x20/0x200 [ 108.211232][ T1409] ret_from_fork+0x31/0x70 [ 108.211380][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.211530][ T1409] [ 108.211530][ T1409] other info that might help us debug this: [ 108.211530][ T1409] [ 108.211817][ T1409] Possible interrupt unsafe locking scenario: [ 108.211817][ T1409] [ 108.212034][ T1409] CPU0 CPU1 [ 108.212183][ T1409] ---- ---- [ 108.212329][ T1409] lock(&p->alloc_lock); [ 108.212440][ T1409] local_irq_disable(); [ 108.212623][ T1409] lock(&ndev->lock); [ 108.212813][ T1409] lock(&p->alloc_lock); [ 108.212996][ T1409] [ 108.213113][ T1409] lock(&ndev->lock); [ 108.213227][ T1409] [ 108.213227][ T1409] *** DEADLOCK *** [ 108.213227][ T1409] [ 108.213444][ T1409] 3 locks held by sysctl/1409: [ 108.213592][ T1409] #0: ffff8880060dc3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 108.213860][ T1409] #1: ffffffffa4b969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 108.214187][ T1409] #2: ffff88800284bd80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 108.214449][ T1409] [ 108.214449][ T1409] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 108.214738][ T1409] -> (&ndev->lock){++--}-{2:2} { [ 108.214892][ T1409] HARDIRQ-ON-W at: [ 108.215007][ T1409] __lock_acquire+0x797/0x1570 [ 108.215200][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.215389][ T1409] _raw_write_lock_bh+0x38/0x50 [ 108.215576][ T1409] addrconf_permanent_addr+0x6e/0x670 [ 108.215764][ T1409] addrconf_notify+0x749/0xd60 [ 108.215952][ T1409] notifier_call_chain+0xcd/0x150 [ 108.216137][ T1409] __dev_notify_flags+0xe6/0x250 [ 108.216327][ T1409] dev_change_flags+0xec/0x160 [ 108.216512][ T1409] do_setlink+0x7d6/0x21e0 [ 108.216701][ T1409] __rtnl_newlink+0xaa7/0xd80 [ 108.216889][ T1409] rtnl_newlink+0x63/0xa0 [ 108.217074][ T1409] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 108.217263][ T1409] netlink_rcv_skb+0x130/0x360 [ 108.217448][ T1409] netlink_unicast+0x449/0x710 [ 108.217636][ T1409] netlink_sendmsg+0x723/0xbe0 [ 108.217823][ T1409] ____sys_sendmsg+0x7b2/0xa10 [ 108.218030][ T1409] ___sys_sendmsg+0xee/0x170 [ 108.218216][ T1409] __sys_sendmsg+0xcd/0x170 [ 108.218399][ T1409] do_syscall_64+0xc6/0x1e0 [ 108.218583][ T1409] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.218804][ T1409] HARDIRQ-ON-R at: [ 108.218920][ T1409] __lock_acquire+0x797/0x1570 [ 108.219123][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.219305][ T1409] _raw_read_lock_bh+0x44/0x80 [ 108.219490][ T1409] inet6_fill_ifla6_attrs+0x516/0x740 [ 108.219674][ T1409] inet6_fill_link_af+0x5e/0xe0 [ 108.219858][ T1409] rtnl_fill_ifinfo+0x1612/0x29e0 [ 108.220044][ T1409] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 108.220228][ T1409] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 108.220447][ T1409] rtmsg_ifinfo+0x5b/0xa0 [ 108.220631][ T1409] register_netdevice+0x1177/0x1690 [ 108.220814][ T1409] register_netdev+0x20/0x40 [ 108.221007][ T1409] sit_init_net+0x250/0x4f0 [ 108.221201][ T1409] ops_init+0x9b/0x560 [ 108.221349][ T1409] register_pernet_operations+0x2db/0x710 [ 108.221569][ T1409] register_pernet_device+0x2a/0x60 [ 108.221754][ T1409] sit_init+0x23/0xe0 [ 108.221900][ T1409] do_one_initcall+0x8d/0x1e0 [ 108.222085][ T1409] do_initcalls+0x1b2/0x3e0 [ 108.222275][ T1409] kernel_init_freeable+0x232/0x310 [ 108.222459][ T1409] kernel_init+0x20/0x200 [ 108.222643][ T1409] ret_from_fork+0x31/0x70 [ 108.222836][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.223045][ T1409] IN-SOFTIRQ-W at: [ 108.223158][ T1409] __lock_acquire+0x797/0x1570 [ 108.223344][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.223534][ T1409] _raw_write_lock+0x30/0x40 [ 108.223722][ T1409] addrconf_rs_timer+0xa9/0x730 [ 108.223906][ T1409] call_timer_fn+0x13b/0x230 [ 108.224093][ T1409] __run_timers+0x545/0x810 [ 108.224280][ T1409] run_timer_softirq+0xe8/0x1b0 [ 108.224466][ T1409] __do_softirq+0x1f8/0x5df [ 108.224650][ T1409] irq_exit_rcu+0x97/0xc0 [ 108.224843][ T1409] sysvec_apic_timer_interrupt+0x75/0x80 [ 108.225063][ T1409] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 108.225287][ T1409] default_idle+0xf/0x20 [ 108.225475][ T1409] default_idle_call+0x6d/0xb0 [ 108.225663][ T1409] cpuidle_idle_call+0x1f4/0x280 [ 108.225849][ T1409] do_idle+0xf9/0x160 [ 108.226001][ T1409] cpu_startup_entry+0x54/0x60 [ 108.226188][ T1409] rest_init+0x14f/0x260 [ 108.226372][ T1409] start_kernel+0x318/0x3d0 [ 108.226559][ T1409] x86_64_start_reservations+0x18/0x30 [ 108.226746][ T1409] x86_64_start_kernel+0xba/0x110 [ 108.226958][ T1409] common_startup_64+0x12c/0x138 [ 108.227148][ T1409] IN-SOFTIRQ-R at: [ 108.227259][ T1409] __lock_acquire+0x797/0x1570 [ 108.227447][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.227630][ T1409] _raw_read_lock_bh+0x44/0x80 [ 108.227816][ T1409] ipv6_get_lladdr+0xa9/0x3e0 [ 108.227998][ T1409] addrconf_rs_timer+0x24a/0x730 [ 108.228187][ T1409] call_timer_fn+0x13b/0x230 [ 108.228376][ T1409] __run_timers+0x545/0x810 [ 108.228560][ T1409] run_timer_softirq+0xe8/0x1b0 [ 108.228744][ T1409] __do_softirq+0x1f8/0x5df [ 108.228929][ T1409] irq_exit_rcu+0x97/0xc0 [ 108.229113][ T1409] sysvec_apic_timer_interrupt+0x75/0x80 [ 108.229333][ T1409] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 108.229559][ T1409] default_idle+0xf/0x20 [ 108.229744][ T1409] default_idle_call+0x6d/0xb0 [ 108.229931][ T1409] cpuidle_idle_call+0x1f4/0x280 [ 108.230116][ T1409] do_idle+0xf9/0x160 [ 108.230265][ T1409] cpu_startup_entry+0x54/0x60 [ 108.230450][ T1409] rest_init+0x14f/0x260 [ 108.230636][ T1409] start_kernel+0x318/0x3d0 [ 108.230827][ T1409] x86_64_start_reservations+0x18/0x30 [ 108.231044][ T1409] x86_64_start_kernel+0xba/0x110 [ 108.231233][ T1409] common_startup_64+0x12c/0x138 [ 108.231503][ T1409] INITIAL USE at: [ 108.231615][ T1409] __lock_acquire+0x797/0x1570 [ 108.231799][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.231986][ T1409] _raw_write_lock_bh+0x38/0x50 [ 108.232174][ T1409] addrconf_permanent_addr+0x6e/0x670 [ 108.232358][ T1409] addrconf_notify+0x749/0xd60 [ 108.232547][ T1409] notifier_call_chain+0xcd/0x150 [ 108.232814][ T1409] __dev_notify_flags+0xe6/0x250 [ 108.232998][ T1409] dev_change_flags+0xec/0x160 [ 108.233184][ T1409] do_setlink+0x7d6/0x21e0 [ 108.233459][ T1409] __rtnl_newlink+0xaa7/0xd80 [ 108.233642][ T1409] rtnl_newlink+0x63/0xa0 [ 108.233828][ T1409] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 108.234011][ T1409] netlink_rcv_skb+0x130/0x360 [ 108.234198][ T1409] netlink_unicast+0x449/0x710 [ 108.234380][ T1409] netlink_sendmsg+0x723/0xbe0 [ 108.234568][ T1409] ____sys_sendmsg+0x7b2/0xa10 [ 108.234836][ T1409] ___sys_sendmsg+0xee/0x170 [ 108.235045][ T1409] __sys_sendmsg+0xcd/0x170 [ 108.235231][ T1409] do_syscall_64+0xc6/0x1e0 [ 108.235499][ T1409] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.235714][ T1409] INITIAL READ USE at: [ 108.235818][ T1409] __lock_acquire+0x797/0x1570 [ 108.235990][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.236323][ T1409] _raw_read_lock_bh+0x44/0x80 [ 108.236495][ T1409] inet6_fill_ifla6_attrs+0x516/0x740 [ 108.236699][ T1409] inet6_fill_link_af+0x5e/0xe0 [ 108.236950][ T1409] rtnl_fill_ifinfo+0x1612/0x29e0 [ 108.237120][ T1409] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 108.237325][ T1409] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 108.237608][ T1409] rtmsg_ifinfo+0x5b/0xa0 [ 108.237778][ T1409] register_netdevice+0x1177/0x1690 [ 108.237982][ T1409] register_netdev+0x20/0x40 [ 108.238235][ T1409] sit_init_net+0x250/0x4f0 [ 108.238409][ T1409] ops_init+0x9b/0x560 [ 108.238580][ T1409] register_pernet_operations+0x2db/0x710 [ 108.238784][ T1409] register_pernet_device+0x2a/0x60 [ 108.239097][ T1409] sit_init+0x23/0xe0 [ 108.239269][ T1409] do_one_initcall+0x8d/0x1e0 [ 108.239441][ T1409] do_initcalls+0x1b2/0x3e0 [ 108.239697][ T1409] kernel_init_freeable+0x232/0x310 [ 108.239901][ T1409] kernel_init+0x20/0x200 [ 108.240076][ T1409] ret_from_fork+0x31/0x70 [ 108.240330][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.240530][ T1409] } [ 108.240602][ T1409] ... key at: [] __key.37+0x0/0x40 [ 108.240810][ T1409] [ 108.240810][ T1409] the dependencies between the lock to be acquired [ 108.240812][ T1409] and SOFTIRQ-irq-unsafe lock: [ 108.241276][ T1409] -> (&p->alloc_lock){+.+.}-{2:2} { [ 108.241418][ T1409] HARDIRQ-ON-W at: [ 108.241527][ T1409] __lock_acquire+0x797/0x1570 [ 108.241781][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.241957][ T1409] _raw_spin_lock+0x30/0x40 [ 108.242129][ T1409] set_mems_allowed+0x1d/0x210 [ 108.242383][ T1409] kernel_init_freeable+0x72/0x310 [ 108.242553][ T1409] kernel_init+0x20/0x200 [ 108.242723][ T1409] ret_from_fork+0x31/0x70 [ 108.243007][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.243179][ T1409] SOFTIRQ-ON-W at: [ 108.243281][ T1409] __lock_acquire+0x797/0x1570 [ 108.243452][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.243704][ T1409] _raw_spin_lock+0x30/0x40 [ 108.243876][ T1409] set_mems_allowed+0x1d/0x210 [ 108.244045][ T1409] kernel_init_freeable+0x72/0x310 [ 108.244215][ T1409] kernel_init+0x20/0x200 [ 108.244465][ T1409] ret_from_fork+0x31/0x70 [ 108.244635][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.244807][ T1409] INITIAL USE at: [ 108.244998][ T1409] __lock_acquire+0x797/0x1570 [ 108.245169][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.245339][ T1409] _raw_spin_lock+0x30/0x40 [ 108.245509][ T1409] set_mems_allowed+0x1d/0x210 [ 108.245679][ T1409] kernel_init_freeable+0x72/0x310 [ 108.245848][ T1409] kernel_init+0x20/0x200 [ 108.246026][ T1409] ret_from_fork+0x31/0x70 [ 108.246277][ T1409] ret_from_fork_asm+0x1a/0x30 [ 108.246447][ T1409] } [ 108.246517][ T1409] ... key at: [] __key.387+0x0/0x40 [ 108.246724][ T1409] ... acquired at: [ 108.247015][ T1409] check_prev_add+0x194/0xce0 [ 108.247156][ T1409] validate_chain+0x71d/0x9b0 [ 108.247292][ T1409] __lock_acquire+0xaf0/0x1570 [ 108.247430][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.247567][ T1409] _raw_spin_lock+0x30/0x40 [ 108.247784][ T1409] __get_task_comm+0x27/0x70 [ 108.247923][ T1409] ref_tracker_alloc+0x2ee/0x490 [ 108.248060][ T1409] netdev_get_by_index+0x5e/0x80 [ 108.248196][ T1409] fib6_nh_init+0x3d8/0x15b0 [ 108.248415][ T1409] ip6_route_info_create+0xf18/0x17d0 [ 108.248552][ T1409] addrconf_f6i_alloc+0x265/0x560 [ 108.248689][ T1409] __ipv6_dev_ac_inc+0x25f/0xb10 [ 108.248824][ T1409] addrconf_join_anycast+0x1c0/0x220 [ 108.248961][ T1409] dev_forward_change+0x2a6/0x7b0 [ 108.249097][ T1409] addrconf_fixup_forwarding+0x23f/0x460 [ 108.249267][ T1409] addrconf_sysctl_forward+0x212/0x2b0 [ 108.249402][ T1409] proc_sys_call_handler+0x403/0x5e0 [ 108.249618][ T1409] vfs_write+0x9e5/0x10a0 [ 108.249758][ T1409] ksys_write+0xf5/0x1e0 [ 108.249898][ T1409] do_syscall_64+0xc6/0x1e0 [ 108.250035][ T1409] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.250283][ T1409] [ 108.250354][ T1409] [ 108.250354][ T1409] stack backtrace: [ 108.250520][ T1409] CPU: 1 PID: 1409 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 108.250725][ T1409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 108.251114][ T1409] Call Trace: [ 108.251218][ T1409] [ 108.251289][ T1409] dump_stack_lvl+0x82/0xd0 [ 108.251428][ T1409] print_bad_irq_dependency+0x957/0xd40 [ 108.251644][ T1409] ? hlock_class+0x4e/0x130 [ 108.251782][ T1409] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 108.251995][ T1409] ? __pfx_usage_skip+0x10/0x10 [ 108.252132][ T1409] ? __bfs+0x246/0x650 [ 108.252316][ T1409] ? __pfx_usage_match+0x10/0x10 [ 108.252454][ T1409] check_irq_usage+0x596/0x850 [ 108.252592][ T1409] ? __pfx_check_irq_usage+0x10/0x10 [ 108.252727][ T1409] ? __bfs+0x246/0x650 [ 108.252830][ T1409] ? __pfx_hlock_conflict+0x10/0x10 [ 108.253045][ T1409] ? check_path.constprop.0+0x24/0x50 [ 108.253181][ T1409] ? check_noncircular+0x14c/0x3e0 [ 108.253319][ T1409] ? __pfx_check_noncircular+0x10/0x10 [ 108.253459][ T1409] ? check_prev_add+0x194/0xce0 [ 108.253677][ T1409] check_prev_add+0x194/0xce0 [ 108.253814][ T1409] ? validate_chain+0x130/0x9b0 [ 108.253951][ T1409] validate_chain+0x71d/0x9b0 [ 108.254088][ T1409] ? mark_lock+0x38/0x3e0 [ 108.254270][ T1409] ? __pfx_validate_chain+0x10/0x10 [ 108.254407][ T1409] ? hlock_class+0x4e/0x130 [ 108.254543][ T1409] ? mark_lock+0x38/0x3e0 [ 108.254648][ T1409] __lock_acquire+0xaf0/0x1570 [ 108.254787][ T1409] lock_acquire.part.0+0xeb/0x330 [ 108.255006][ T1409] ? __get_task_comm+0x27/0x70 [ 108.255144][ T1409] ? mark_lock+0x38/0x3e0 [ 108.255249][ T1409] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 108.255384][ T1409] ? trace_lock_acquire+0x135/0x1c0 [ 108.255599][ T1409] ? __get_task_comm+0x27/0x70 [ 108.255734][ T1409] ? lock_acquire+0x32/0xc0 [ 108.255870][ T1409] ? __get_task_comm+0x27/0x70 [ 108.256040][ T1409] _raw_spin_lock+0x30/0x40 [ 108.256180][ T1409] ? __get_task_comm+0x27/0x70 [ 108.256397][ T1409] __get_task_comm+0x27/0x70 [ 108.256533][ T1409] ref_tracker_alloc+0x2ee/0x490 [ 108.256673][ T1409] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 108.256808][ T1409] ? dev_get_by_index+0x177/0x270 [ 108.257023][ T1409] ? netdev_get_by_index+0x5e/0x80 [ 108.257159][ T1409] ? fib6_nh_init+0x3d8/0x15b0 [ 108.257295][ T1409] ? ip6_route_info_create+0xf18/0x17d0 [ 108.257431][ T1409] ? addrconf_f6i_alloc+0x265/0x560 [ 108.257730][ T1409] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 108.257868][ T1409] ? addrconf_join_anycast+0x1c0/0x220 [ 108.258003][ T1409] ? dev_forward_change+0x2a6/0x7b0 [ 108.258140][ T1409] ? addrconf_fixup_forwarding+0x23f/0x460 [ 108.258388][ T1409] ? addrconf_sysctl_forward+0x212/0x2b0 [ 108.258531][ T1409] ? proc_sys_call_handler+0x403/0x5e0 [ 108.258669][ T1409] ? vfs_write+0x9e5/0x10a0 [ 108.258808][ T1409] ? ksys_write+0xf5/0x1e0 [ 108.258942][ T1409] ? do_syscall_64+0xc6/0x1e0 [ 108.259077][ T1409] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.259243][ T1409] ? dev_get_by_index+0x177/0x270 [ 108.259379][ T1409] netdev_get_by_index+0x5e/0x80 [ 108.259592][ T1409] fib6_nh_init+0x3d8/0x15b0 [ 108.259728][ T1409] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 108.259907][ T1409] ? __pfx_fib6_nh_init+0x10/0x10 [ 108.260062][ T1409] ? kasan_save_track+0x14/0x30 [ 108.260284][ T1409] ? __kasan_kmalloc+0x7f/0x90 [ 108.260429][ T1409] ? __kmalloc+0x1d7/0x3c0 [ 108.260563][ T1409] ? fib6_get_table+0x116/0x290 [ 108.260701][ T1409] ip6_route_info_create+0xf18/0x17d0 [ 108.260836][ T1409] ? __lock_release+0x103/0x460 [ 108.261063][ T1409] ? __pfx_ip6_route_info_create+0x10/0x10 [ 108.261235][ T1409] ? addrconf_f6i_alloc+0x12d/0x560 [ 108.261374][ T1409] addrconf_f6i_alloc+0x265/0x560 [ 108.261517][ T1409] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 108.261736][ T1409] ? do_raw_write_lock+0x122/0x3b0 [ 108.261869][ T1409] ? __pfx_do_raw_write_lock+0x10/0x10 [ 108.262011][ T1409] ? lock_acquire+0x32/0xc0 [ 108.262147][ T1409] __ipv6_dev_ac_inc+0x25f/0xb10 [ 108.262369][ T1409] addrconf_join_anycast+0x1c0/0x220 [ 108.262508][ T1409] ? mark_lock+0x38/0x3e0 [ 108.262611][ T1409] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 108.262786][ T1409] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 108.263039][ T1409] dev_forward_change+0x2a6/0x7b0 [ 108.263175][ T1409] ? __pfx_dev_forward_change+0x10/0x10 [ 108.263316][ T1409] addrconf_fixup_forwarding+0x23f/0x460 [ 108.263455][ T1409] addrconf_sysctl_forward+0x212/0x2b0 [ 108.263671][ T1409] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 108.263848][ T1409] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 108.264047][ T1409] ? trace_kmalloc+0x2a/0xe0 [ 108.264185][ T1409] ? __kmalloc_node+0x220/0x400 [ 108.264406][ T1409] ? proc_sys_call_handler+0x30b/0x5e0 [ 108.264547][ T1409] proc_sys_call_handler+0x403/0x5e0 [ 108.264682][ T1409] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 108.264852][ T1409] ? __lock_acquire+0xaf0/0x1570 [ 108.264999][ T1409] vfs_write+0x9e5/0x10a0 [ 108.265104][ T1409] ? do_user_addr_fault+0x449/0xbe0 [ 108.265249][ T1409] ? __pfx_vfs_write+0x10/0x10 [ 108.265384][ T1409] ? find_held_lock+0x2c/0x110 [ 108.265600][ T1409] ? __pfx___lock_release+0x10/0x10 [ 108.265740][ T1409] ? __fget_light+0x53/0x1e0 [ 108.265876][ T1409] ksys_write+0xf5/0x1e0 [ 108.265977][ T1409] ? __pfx_ksys_write+0x10/0x10 [ 108.266111][ T1409] ? do_user_addr_fault+0x4bd/0xbe0 [ 108.266327][ T1409] do_syscall_64+0xc6/0x1e0 [ 108.266464][ T1409] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 108.266637][ T1409] RIP: 0033:0x7f888f495957 [ 108.266782][ T1409] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 [ 108.267356][ T1409] RSP: 002b:00007fff1f7da7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 108.267649][ T1409] RAX: ffffffffffffffda RBX: 000055d267ed6360 RCX: 00007f888f495957 [ 108.267860][ T1409] RDX: 0000000000000002 RSI: 000055d267ed63a0 RDI: 0000000000000005 [ 108.268097][ T1409] RBP: 000055d267ed84d0 R08: 0000000000000003 R09: 0000000000000077 [ 108.268479][ T1409] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 108.268680][ T1409] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f888f54c9c0 [ 108.268891][ T1409]