[ 30.370642][ T295] 8021q: 802.1Q VLAN Support v1.8
[ 31.455992][ T306] gre: GRE over IPv4 demultiplexor driver
[ 31.476456][ T306] ip_gre: GRE over IPv4 tunneling driver
[ 31.828690][ T312] ip (312) used greatest stack depth: 23968 bytes left
[ 35.228112][ T342] ip (342) used greatest stack depth: 23808 bytes left
[ 38.523170][ T372] GACT probability NOT on
[ 40.263823][ T388]
[ 40.263931][ T388] =====================================================
[ 40.264104][ T388] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
[ 40.264348][ T388] 6.9.0-rc1-virtme #1 Not tainted
[ 40.264491][ T388] -----------------------------------------------------
[ 40.264666][ T388] sysctl/388 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
[ 40.264889][ T388] ffff888003e20968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70
[ 40.265151][ T388]
[ 40.265151][ T388] and this task is already holding:
[ 40.265366][ T388] ffff8880061b8d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10
[ 40.265625][ T388] which would create a new lock dependency:
[ 40.265800][ T388] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2}
[ 40.266022][ T388]
[ 40.266022][ T388] but this new dependency connects a SOFTIRQ-irq-safe lock:
[ 40.266291][ T388] (&ndev->lock){++--}-{2:2}
[ 40.266294][ T388]
[ 40.266294][ T388] ... which became SOFTIRQ-irq-safe at:
[ 40.266647][ T388] __lock_acquire+0x797/0x1570
[ 40.266801][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.266941][ T388] _raw_write_lock+0x30/0x40
[ 40.267089][ T388] addrconf_rs_timer+0xa9/0x730
[ 40.267229][ T388] call_timer_fn+0x13b/0x230
[ 40.267369][ T388] __run_timers+0x545/0x810
[ 40.267509][ T388] run_timer_softirq+0xe8/0x1b0
[ 40.267661][ T388] __do_softirq+0x1f8/0x5df
[ 40.267798][ T388] irq_exit_rcu+0x97/0xc0
[ 40.267941][ T388] sysvec_apic_timer_interrupt+0x75/0x80
[ 40.268085][ T388] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 40.268259][ T388] default_idle+0xf/0x20
[ 40.268365][ T388] default_idle_call+0x6d/0xb0
[ 40.268502][ T388] cpuidle_idle_call+0x1f4/0x280
[ 40.268641][ T388] do_idle+0xf9/0x160
[ 40.268743][ T388] cpu_startup_entry+0x54/0x60
[ 40.268891][ T388] start_secondary+0x21c/0x2b0
[ 40.269034][ T388] common_startup_64+0x12c/0x138
[ 40.269175][ T388]
[ 40.269175][ T388] to a SOFTIRQ-irq-unsafe lock:
[ 40.269347][ T388] (&p->alloc_lock){+.+.}-{2:2}
[ 40.269352][ T388]
[ 40.269352][ T388] ... which became SOFTIRQ-irq-unsafe at:
[ 40.269692][ T388] ...
[ 40.269693][ T388] __lock_acquire+0x797/0x1570
[ 40.269904][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.270041][ T388] _raw_spin_lock+0x30/0x40
[ 40.270185][ T388] set_mems_allowed+0x1d/0x210
[ 40.270325][ T388] kernel_init_freeable+0x72/0x310
[ 40.270467][ T388] kernel_init+0x20/0x200
[ 40.270601][ T388] ret_from_fork+0x31/0x70
[ 40.270740][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.270879][ T388]
[ 40.270879][ T388] other info that might help us debug this:
[ 40.270879][ T388]
[ 40.271151][ T388] Possible interrupt unsafe locking scenario:
[ 40.271151][ T388]
[ 40.271364][ T388] CPU0 CPU1
[ 40.271501][ T388] ---- ----
[ 40.271662][ T388] lock(&p->alloc_lock);
[ 40.271769][ T388] local_irq_disable();
[ 40.271938][ T388] lock(&ndev->lock);
[ 40.272107][ T388] lock(&p->alloc_lock);
[ 40.272284][ T388] <Interrupt>
[ 40.272389][ T388] lock(&ndev->lock);
[ 40.272497][ T388]
[ 40.272497][ T388] *** DEADLOCK ***
[ 40.272497][ T388]
[ 40.272700][ T388] 3 locks held by sysctl/388:
[ 40.272838][ T388] #0: ffff888005edc3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0
[ 40.273088][ T388] #1: ffffffff86d969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460
[ 40.273371][ T388] #2: ffff8880061b8d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10
[ 40.273634][ T388]
[ 40.273634][ T388] the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
[ 40.273901][ T388] -> (&ndev->lock){++--}-{2:2} {
[ 40.274049][ T388] HARDIRQ-ON-W at:
[ 40.274156][ T388] __lock_acquire+0x797/0x1570
[ 40.274335][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.274538][ T388] _raw_write_lock_bh+0x38/0x50
[ 40.274717][ T388] addrconf_permanent_addr+0x6e/0x670
[ 40.274897][ T388] addrconf_notify+0x749/0xd60
[ 40.275070][ T388] notifier_call_chain+0xcd/0x150
[ 40.275256][ T388] __dev_notify_flags+0xe6/0x250
[ 40.275433][ T388] dev_change_flags+0xec/0x160
[ 40.275624][ T388] do_setlink+0x7d6/0x21e0
[ 40.275809][ T388] __rtnl_newlink+0xaa7/0xd80
[ 40.275996][ T388] rtnl_newlink+0x63/0xa0
[ 40.276169][ T388] rtnetlink_rcv_msg+0x2fb/0xbf0
[ 40.276346][ T388] netlink_rcv_skb+0x130/0x360
[ 40.276581][ T388] netlink_unicast+0x449/0x710
[ 40.276757][ T388] netlink_sendmsg+0x723/0xbe0
[ 40.276937][ T388] ____sys_sendmsg+0x7b2/0xa10
[ 40.277120][ T388] ___sys_sendmsg+0xee/0x170
[ 40.277312][ T388] __sys_sendmsg+0xcd/0x170
[ 40.277485][ T388] do_syscall_64+0xc6/0x1e0
[ 40.277657][ T388] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 40.277878][ T388] HARDIRQ-ON-R at:
[ 40.277981][ T388] __lock_acquire+0x797/0x1570
[ 40.278162][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.278350][ T388] _raw_read_lock_bh+0x44/0x80
[ 40.278528][ T388] inet6_fill_ifla6_attrs+0x516/0x740
[ 40.278720][ T388] inet6_fill_link_af+0x5e/0xe0
[ 40.278898][ T388] rtnl_fill_ifinfo+0x1612/0x29e0
[ 40.279079][ T388] rtmsg_ifinfo_build_skb+0x13c/0x240
[ 40.279256][ T388] rtmsg_ifinfo_event.part.0+0x2d/0x120
[ 40.279476][ T388] rtmsg_ifinfo+0x5b/0xa0
[ 40.279666][ T388] register_netdevice+0x1177/0x1690
[ 40.279845][ T388] register_netdev+0x20/0x40
[ 40.280022][ T388] sit_init_net+0x250/0x4f0
[ 40.280204][ T388] ops_init+0x9b/0x560
[ 40.280353][ T388] register_pernet_operations+0x2db/0x710
[ 40.280573][ T388] register_pernet_device+0x2a/0x60
[ 40.280754][ T388] sit_init+0x23/0xe0
[ 40.280906][ T388] do_one_initcall+0x8d/0x1e0
[ 40.281086][ T388] do_initcalls+0x1b2/0x3e0
[ 40.281263][ T388] kernel_init_freeable+0x232/0x310
[ 40.281445][ T388] kernel_init+0x20/0x200
[ 40.281625][ T388] ret_from_fork+0x31/0x70
[ 40.281810][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.281990][ T388] IN-SOFTIRQ-W at:
[ 40.282102][ T388] __lock_acquire+0x797/0x1570
[ 40.282275][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.282461][ T388] _raw_write_lock+0x30/0x40
[ 40.282645][ T388] addrconf_rs_timer+0xa9/0x730
[ 40.282825][ T388] call_timer_fn+0x13b/0x230
[ 40.283021][ T388] __run_timers+0x545/0x810
[ 40.283195][ T388] run_timer_softirq+0xe8/0x1b0
[ 40.283396][ T388] __do_softirq+0x1f8/0x5df
[ 40.283578][ T388] irq_exit_rcu+0x97/0xc0
[ 40.283759][ T388] sysvec_apic_timer_interrupt+0x75/0x80
[ 40.283981][ T388] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 40.284197][ T388] default_idle+0xf/0x20
[ 40.284379][ T388] default_idle_call+0x6d/0xb0
[ 40.284555][ T388] cpuidle_idle_call+0x1f4/0x280
[ 40.284739][ T388] do_idle+0xf9/0x160
[ 40.284884][ T388] cpu_startup_entry+0x54/0x60
[ 40.285080][ T388] start_secondary+0x21c/0x2b0
[ 40.285262][ T388] common_startup_64+0x12c/0x138
[ 40.285441][ T388] IN-SOFTIRQ-R at:
[ 40.285553][ T388] __lock_acquire+0x797/0x1570
[ 40.285730][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.285910][ T388] _raw_read_lock_bh+0x44/0x80
[ 40.286090][ T388] ipv6_get_lladdr+0xa9/0x3e0
[ 40.286274][ T388] addrconf_rs_timer+0x24a/0x730
[ 40.286449][ T388] call_timer_fn+0x13b/0x230
[ 40.286642][ T388] __run_timers+0x545/0x810
[ 40.286821][ T388] run_timer_softirq+0xe8/0x1b0
[ 40.287002][ T388] __do_softirq+0x1f8/0x5df
[ 40.287183][ T388] irq_exit_rcu+0x97/0xc0
[ 40.287363][ T388] sysvec_apic_timer_interrupt+0x75/0x80
[ 40.287580][ T388] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 40.287791][ T388] default_idle+0xf/0x20
[ 40.287975][ T388] default_idle_call+0x6d/0xb0
[ 40.288152][ T388] cpuidle_idle_call+0x1f4/0x280
[ 40.288334][ T388] do_idle+0xf9/0x160
[ 40.288488][ T388] cpu_startup_entry+0x54/0x60
[ 40.288671][ T388] start_secondary+0x21c/0x2b0
[ 40.288844][ T388] common_startup_64+0x12c/0x138
[ 40.289024][ T388] INITIAL USE at:
[ 40.289127][ T388] __lock_acquire+0x797/0x1570
[ 40.289304][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.289481][ T388] _raw_write_lock_bh+0x38/0x50
[ 40.289663][ T388] addrconf_permanent_addr+0x6e/0x670
[ 40.289844][ T388] addrconf_notify+0x749/0xd60
[ 40.290027][ T388] notifier_call_chain+0xcd/0x150
[ 40.290203][ T388] __dev_notify_flags+0xe6/0x250
[ 40.290385][ T388] dev_change_flags+0xec/0x160
[ 40.290563][ T388] do_setlink+0x7d6/0x21e0
[ 40.290742][ T388] __rtnl_newlink+0xaa7/0xd80
[ 40.290935][ T388] rtnl_newlink+0x63/0xa0
[ 40.291125][ T388] rtnetlink_rcv_msg+0x2fb/0xbf0
[ 40.291301][ T388] netlink_rcv_skb+0x130/0x360
[ 40.291562][ T388] netlink_unicast+0x449/0x710
[ 40.291744][ T388] netlink_sendmsg+0x723/0xbe0
[ 40.291925][ T388] ____sys_sendmsg+0x7b2/0xa10
[ 40.292187][ T388] ___sys_sendmsg+0xee/0x170
[ 40.292374][ T388] __sys_sendmsg+0xcd/0x170
[ 40.292553][ T388] do_syscall_64+0xc6/0x1e0
[ 40.292736][ T388] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 40.293030][ T388] INITIAL READ USE at:
[ 40.293141][ T388] __lock_acquire+0x797/0x1570
[ 40.293315][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.293576][ T388] _raw_read_lock_bh+0x44/0x80
[ 40.293751][ T388] inet6_fill_ifla6_attrs+0x516/0x740
[ 40.293964][ T388] inet6_fill_link_af+0x5e/0xe0
[ 40.294140][ T388] rtnl_fill_ifinfo+0x1612/0x29e0
[ 40.294503][ T388] rtmsg_ifinfo_build_skb+0x13c/0x240
[ 40.294712][ T388] rtmsg_ifinfo_event.part.0+0x2d/0x120
[ 40.294936][ T388] rtmsg_ifinfo+0x5b/0xa0
[ 40.295197][ T388] register_netdevice+0x1177/0x1690
[ 40.295416][ T388] register_netdev+0x20/0x40
[ 40.295591][ T388] sit_init_net+0x250/0x4f0
[ 40.295885][ T388] ops_init+0x9b/0x560
[ 40.296057][ T388] register_pernet_operations+0x2db/0x710
[ 40.296278][ T388] register_pernet_device+0x2a/0x60
[ 40.296500][ T388] sit_init+0x23/0xe0
[ 40.296713][ T388] do_one_initcall+0x8d/0x1e0
[ 40.296895][ T388] do_initcalls+0x1b2/0x3e0
[ 40.297150][ T388] kernel_init_freeable+0x232/0x310
[ 40.297356][ T388] kernel_init+0x20/0x200
[ 40.297536][ T388] ret_from_fork+0x31/0x70
[ 40.297809][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.297985][ T388] }
[ 40.298057][ T388] ... key at: [<ffffffff88e58300>] __key.37+0x0/0x40
[ 40.298268][ T388]
[ 40.298268][ T388] the dependencies between the lock to be acquired
[ 40.298270][ T388] and SOFTIRQ-irq-unsafe lock:
[ 40.298721][ T388] -> (&p->alloc_lock){+.+.}-{2:2} {
[ 40.298871][ T388] HARDIRQ-ON-W at:
[ 40.298975][ T388] __lock_acquire+0x797/0x1570
[ 40.299236][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.299429][ T388] _raw_spin_lock+0x30/0x40
[ 40.299601][ T388] set_mems_allowed+0x1d/0x210
[ 40.299860][ T388] kernel_init_freeable+0x72/0x310
[ 40.300037][ T388] kernel_init+0x20/0x200
[ 40.300221][ T388] ret_from_fork+0x31/0x70
[ 40.300402][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.300675][ T388] SOFTIRQ-ON-W at:
[ 40.300784][ T388] __lock_acquire+0x797/0x1570
[ 40.300957][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.301129][ T388] _raw_spin_lock+0x30/0x40
[ 40.301392][ T388] set_mems_allowed+0x1d/0x210
[ 40.301565][ T388] kernel_init_freeable+0x72/0x310
[ 40.301738][ T388] kernel_init+0x20/0x200
[ 40.301992][ T388] ret_from_fork+0x31/0x70
[ 40.302166][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.302339][ T388] INITIAL USE at:
[ 40.302443][ T388] __lock_acquire+0x797/0x1570
[ 40.302703][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.302876][ T388] _raw_spin_lock+0x30/0x40
[ 40.303049][ T388] set_mems_allowed+0x1d/0x210
[ 40.303310][ T388] kernel_init_freeable+0x72/0x310
[ 40.303481][ T388] kernel_init+0x20/0x200
[ 40.303654][ T388] ret_from_fork+0x31/0x70
[ 40.303827][ T388] ret_from_fork_asm+0x1a/0x30
[ 40.304086][ T388] }
[ 40.304161][ T388] ... key at: [<ffffffff87dffd20>] __key.387+0x0/0x40
[ 40.304368][ T388] ... acquired at:
[ 40.304472][ T388] check_prev_add+0x194/0xce0
[ 40.304692][ T388] validate_chain+0x71d/0x9b0
[ 40.304829][ T388] __lock_acquire+0xaf0/0x1570
[ 40.304966][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.305105][ T388] _raw_spin_lock+0x30/0x40
[ 40.305410][ T388] __get_task_comm+0x27/0x70
[ 40.305549][ T388] ref_tracker_alloc+0x2ee/0x490
[ 40.305689][ T388] netdev_get_by_index+0x5e/0x80
[ 40.305827][ T388] fib6_nh_init+0x3d8/0x15b0
[ 40.306053][ T388] ip6_route_info_create+0xf18/0x17d0
[ 40.306192][ T388] addrconf_f6i_alloc+0x265/0x560
[ 40.306336][ T388] __ipv6_dev_ac_inc+0x25f/0xb10
[ 40.306485][ T388] addrconf_join_anycast+0x1c0/0x220
[ 40.306630][ T388] dev_forward_change+0x2a6/0x7b0
[ 40.306859][ T388] addrconf_fixup_forwarding+0x23f/0x460
[ 40.307033][ T388] addrconf_sysctl_forward+0x212/0x2b0
[ 40.307182][ T388] proc_sys_call_handler+0x403/0x5e0
[ 40.307321][ T388] vfs_write+0x9e5/0x10a0
[ 40.307458][ T388] ksys_write+0xf5/0x1e0
[ 40.307595][ T388] do_syscall_64+0xc6/0x1e0
[ 40.307738][ T388] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 40.307911][ T388]
[ 40.308063][ T388]
[ 40.308063][ T388] stack backtrace:
[ 40.308231][ T388] CPU: 1 PID: 388 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1
[ 40.308438][ T388] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 40.308824][ T388] Call Trace:
[ 40.308929][ T388] <TASK>
[ 40.309007][ T388] dump_stack_lvl+0x82/0xd0
[ 40.309147][ T388] print_bad_irq_dependency+0x957/0xd40
[ 40.309286][ T388] ? hlock_class+0x4e/0x130
[ 40.309437][ T388] ? __pfx_print_bad_irq_dependency+0x10/0x10
[ 40.309607][ T388] ? __pfx_usage_skip+0x10/0x10
[ 40.309746][ T388] ? __bfs+0x246/0x650
[ 40.309853][ T388] ? __pfx_usage_match+0x10/0x10
[ 40.309991][ T388] check_irq_usage+0x596/0x850
[ 40.310129][ T388] ? __pfx_check_irq_usage+0x10/0x10
[ 40.310271][ T388] ? __bfs+0x246/0x650
[ 40.310375][ T388] ? __pfx_hlock_conflict+0x10/0x10
[ 40.310595][ T388] ? check_path.constprop.0+0x24/0x50
[ 40.310734][ T388] ? check_noncircular+0x14c/0x3e0
[ 40.310873][ T388] ? __pfx_check_noncircular+0x10/0x10
[ 40.311014][ T388] ? check_prev_add+0x194/0xce0
[ 40.311230][ T388] check_prev_add+0x194/0xce0
[ 40.311378][ T388] ? validate_chain+0x130/0x9b0
[ 40.311519][ T388] validate_chain+0x71d/0x9b0
[ 40.311659][ T388] ? mark_lock+0x38/0x3e0
[ 40.311762][ T388] ? __pfx_validate_chain+0x10/0x10
[ 40.311978][ T388] ? hlock_class+0x4e/0x130
[ 40.312116][ T388] ? mark_lock+0x38/0x3e0
[ 40.312221][ T388] __lock_acquire+0xaf0/0x1570
[ 40.312361][ T388] lock_acquire.part.0+0xeb/0x330
[ 40.312577][ T388] ? __get_task_comm+0x27/0x70
[ 40.312716][ T388] ? mark_lock+0x38/0x3e0
[ 40.312825][ T388] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 40.312960][ T388] ? trace_lock_acquire+0x135/0x1c0
[ 40.313095][ T388] ? __get_task_comm+0x27/0x70
[ 40.313311][ T388] ? lock_acquire+0x32/0xc0
[ 40.313447][ T388] ? __get_task_comm+0x27/0x70
[ 40.313582][ T388] _raw_spin_lock+0x30/0x40
[ 40.313718][ T388] ? __get_task_comm+0x27/0x70
[ 40.313932][ T388] __get_task_comm+0x27/0x70
[ 40.314077][ T388] ref_tracker_alloc+0x2ee/0x490
[ 40.314216][ T388] ? __pfx_ref_tracker_alloc+0x10/0x10
[ 40.314354][ T388] ? dev_get_by_index+0x177/0x270
[ 40.314570][ T388] ? netdev_get_by_index+0x5e/0x80
[ 40.314707][ T388] ? fib6_nh_init+0x3d8/0x15b0
[ 40.314844][ T388] ? ip6_route_info_create+0xf18/0x17d0
[ 40.314979][ T388] ? addrconf_f6i_alloc+0x265/0x560
[ 40.315115][ T388] ? __ipv6_dev_ac_inc+0x25f/0xb10
[ 40.315337][ T388] ? addrconf_join_anycast+0x1c0/0x220
[ 40.315475][ T388] ? dev_forward_change+0x2a6/0x7b0
[ 40.315614][ T388] ? addrconf_fixup_forwarding+0x23f/0x460
[ 40.315789][ T388] ? addrconf_sysctl_forward+0x212/0x2b0
[ 40.315925][ T388] ? proc_sys_call_handler+0x403/0x5e0
[ 40.316066][ T388] ? vfs_write+0x9e5/0x10a0
[ 40.316202][ T388] ? ksys_write+0xf5/0x1e0
[ 40.316338][ T388] ? do_syscall_64+0xc6/0x1e0
[ 40.316494][ T388] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 40.316671][ T388] ? dev_get_by_index+0x177/0x270
[ 40.316810][ T388] netdev_get_by_index+0x5e/0x80
[ 40.316945][ T388] fib6_nh_init+0x3d8/0x15b0
[ 40.317083][ T388] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370
[ 40.317253][ T388] ? __pfx_fib6_nh_init+0x10/0x10
[ 40.317388][ T388] ? kasan_save_track+0x14/0x30
[ 40.317525][ T388] ? __kasan_kmalloc+0x7f/0x90
[ 40.317669][ T388] ? __kmalloc+0x1d7/0x3c0
[ 40.317806][ T388] ? fib6_get_table+0x116/0x290
[ 40.317945][ T388] ip6_route_info_create+0xf18/0x17d0
[ 40.318083][ T388] ? __lock_release+0x103/0x460
[ 40.318226][ T388] ? __pfx_ip6_route_info_create+0x10/0x10
[ 40.318398][ T388] ? addrconf_f6i_alloc+0x12d/0x560
[ 40.318537][ T388] addrconf_f6i_alloc+0x265/0x560
[ 40.318684][ T388] ? __pfx_addrconf_f6i_alloc+0x10/0x10
[ 40.318834][ T388] ? do_raw_write_lock+0x122/0x3b0
[ 40.318989][ T388] ? __pfx_do_raw_write_lock+0x10/0x10
[ 40.319127][ T388] ? lock_acquire+0x32/0xc0
[ 40.319267][ T388] __ipv6_dev_ac_inc+0x25f/0xb10
[ 40.319409][ T388] addrconf_join_anycast+0x1c0/0x220
[ 40.319556][ T388] ? mark_lock+0x38/0x3e0
[ 40.319661][ T388] ? __pfx_addrconf_join_anycast+0x10/0x10
[ 40.319838][ T388] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 40.320016][ T388] dev_forward_change+0x2a6/0x7b0
[ 40.320160][ T388] ? __pfx_dev_forward_change+0x10/0x10
[ 40.320300][ T388] addrconf_fixup_forwarding+0x23f/0x460
[ 40.320449][ T388] addrconf_sysctl_forward+0x212/0x2b0
[ 40.320589][ T388] ? __pfx_addrconf_sysctl_forward+0x10/0x10
[ 40.320768][ T388] ? __pfx_addrconf_sysctl_forward+0x10/0x10
[ 40.320938][ T388] ? trace_kmalloc+0x2a/0xe0
[ 40.321080][ T388] ? __kmalloc_node+0x220/0x400
[ 40.321223][ T388] ? proc_sys_call_handler+0x30b/0x5e0
[ 40.321358][ T388] proc_sys_call_handler+0x403/0x5e0
[ 40.321508][ T388] ? __pfx_proc_sys_call_handler+0x10/0x10
[ 40.321679][ T388] ? __lock_acquire+0xaf0/0x1570
[ 40.321825][ T388] vfs_write+0x9e5/0x10a0
[ 40.321930][ T388] ? do_user_addr_fault+0x449/0xbe0
[ 40.322076][ T388] ? __pfx_vfs_write+0x10/0x10
[ 40.322218][ T388] ? find_held_lock+0x2c/0x110
[ 40.322357][ T388] ? __pfx___lock_release+0x10/0x10
[ 40.322501][ T388] ? __fget_light+0x53/0x1e0
[ 40.322640][ T388] ksys_write+0xf5/0x1e0
[ 40.322751][ T388] ? __pfx_ksys_write+0x10/0x10
[ 40.322888][ T388] ? do_user_addr_fault+0x4bd/0xbe0
[ 40.323029][ T388] do_syscall_64+0xc6/0x1e0
[ 40.323167][ T388] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 40.323356][ T388] RIP: 0033:0x7f21a273e957
[ 40.323505][ T388] 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
[ 40.324004][ T388] RSP: 002b:00007ffc23141ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 40.324217][ T388] RAX: ffffffffffffffda RBX: 0000556f09fed360 RCX: 00007f21a273e957
[ 40.324437][ T388] RDX: 0000000000000002 RSI: 0000556f09fed3a0 RDI: 0000000000000005
[ 40.324688][ T388] RBP: 0000556f09fef4d0 R08: 0000000000000003 R09: 0000000000000077
[ 40.324916][ T388] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002
[ 40.325126][ T388] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f21a27f59c0
[ 40.325341][ T388] </TASK>