[ 29.267933][ T294] 8021q: 802.1Q VLAN Support v1.8 [ 30.347245][ T305] gre: GRE over IPv4 demultiplexor driver [ 30.362764][ T305] ip_gre: GRE over IPv4 tunneling driver [ 35.981334][ T362] GACT probability NOT on [ 37.456795][ T376] [ 37.456913][ T376] ===================================================== [ 37.457115][ T376] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 37.457359][ T376] 6.9.0-rc1-virtme #1 Not tainted [ 37.457513][ T376] ----------------------------------------------------- [ 37.457701][ T376] sysctl/376 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 37.457929][ T376] ffff888005e5cee8 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 37.458222][ T376] [ 37.458222][ T376] and this task is already holding: [ 37.458450][ T376] ffff888006fc8d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 37.458729][ T376] which would create a new lock dependency: [ 37.458912][ T376] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 37.459141][ T376] [ 37.459141][ T376] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 37.459397][ T376] (&ndev->lock){++--}-{2:2} [ 37.459401][ T376] [ 37.459401][ T376] ... which became SOFTIRQ-irq-safe at: [ 37.459761][ T376] __lock_acquire+0x797/0x1570 [ 37.459935][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.460083][ T376] _raw_write_lock+0x30/0x40 [ 37.460236][ T376] addrconf_rs_timer+0xa9/0x730 [ 37.460383][ T376] call_timer_fn+0x13b/0x230 [ 37.460538][ T376] __run_timers+0x545/0x810 [ 37.460688][ T376] run_timer_softirq+0xe8/0x1b0 [ 37.460837][ T376] __do_softirq+0x1f8/0x5df [ 37.460986][ T376] irq_exit_rcu+0x97/0xc0 [ 37.461141][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.461298][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.461488][ T376] default_idle+0xf/0x20 [ 37.461605][ T376] default_idle_call+0x6d/0xb0 [ 37.461757][ T376] cpuidle_idle_call+0x1f4/0x280 [ 37.461912][ T376] do_idle+0xf9/0x160 [ 37.462028][ T376] cpu_startup_entry+0x54/0x60 [ 37.462179][ T376] start_secondary+0x21c/0x2b0 [ 37.462332][ T376] common_startup_64+0x12c/0x138 [ 37.462491][ T376] [ 37.462491][ T376] to a SOFTIRQ-irq-unsafe lock: [ 37.462675][ T376] (&p->alloc_lock){+.+.}-{2:2} [ 37.462679][ T376] [ 37.462679][ T376] ... which became SOFTIRQ-irq-unsafe at: [ 37.463056][ T376] ... [ 37.463058][ T376] __lock_acquire+0x797/0x1570 [ 37.463289][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.463437][ T376] _raw_spin_lock+0x30/0x40 [ 37.463587][ T376] set_mems_allowed+0x1d/0x210 [ 37.463747][ T376] kernel_init_freeable+0x72/0x310 [ 37.463899][ T376] kernel_init+0x20/0x200 [ 37.464048][ T376] ret_from_fork+0x31/0x70 [ 37.464201][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.464360][ T376] [ 37.464360][ T376] other info that might help us debug this: [ 37.464360][ T376] [ 37.464651][ T376] Possible interrupt unsafe locking scenario: [ 37.464651][ T376] [ 37.464872][ T376] CPU0 CPU1 [ 37.465028][ T376] ---- ---- [ 37.465179][ T376] lock(&p->alloc_lock); [ 37.465293][ T376] local_irq_disable(); [ 37.465477][ T376] lock(&ndev->lock); [ 37.465666][ T376] lock(&p->alloc_lock); [ 37.465853][ T376] [ 37.465965][ T376] lock(&ndev->lock); [ 37.466087][ T376] [ 37.466087][ T376] *** DEADLOCK *** [ 37.466087][ T376] [ 37.466309][ T376] 3 locks held by sysctl/376: [ 37.466459][ T376] #0: ffff8880060ac3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 37.466731][ T376] #1: ffffffffabb969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 37.467037][ T376] #2: ffff888006fc8d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 37.467309][ T376] [ 37.467309][ T376] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 37.467603][ T376] -> (&ndev->lock){++--}-{2:2} { [ 37.467761][ T376] HARDIRQ-ON-W at: [ 37.467880][ T376] __lock_acquire+0x797/0x1570 [ 37.468071][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.468262][ T376] _raw_write_lock_bh+0x38/0x50 [ 37.468456][ T376] addrconf_permanent_addr+0x6e/0x670 [ 37.468645][ T376] addrconf_notify+0x749/0xd60 [ 37.468835][ T376] notifier_call_chain+0xcd/0x150 [ 37.469033][ T376] __dev_notify_flags+0xe6/0x250 [ 37.469242][ T376] dev_change_flags+0xec/0x160 [ 37.469430][ T376] do_setlink+0x7d6/0x21e0 [ 37.469627][ T376] __rtnl_newlink+0xaa7/0xd80 [ 37.469818][ T376] rtnl_newlink+0x63/0xa0 [ 37.470010][ T376] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 37.470200][ T376] netlink_rcv_skb+0x130/0x360 [ 37.470399][ T376] netlink_unicast+0x449/0x710 [ 37.470596][ T376] netlink_sendmsg+0x723/0xbe0 [ 37.470798][ T376] ____sys_sendmsg+0x7b2/0xa10 [ 37.471000][ T376] ___sys_sendmsg+0xee/0x170 [ 37.471197][ T376] __sys_sendmsg+0xcd/0x170 [ 37.471388][ T376] do_syscall_64+0xc6/0x1e0 [ 37.471587][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.471825][ T376] HARDIRQ-ON-R at: [ 37.471942][ T376] __lock_acquire+0x797/0x1570 [ 37.472134][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.472332][ T376] _raw_read_lock_bh+0x44/0x80 [ 37.472523][ T376] inet6_fill_ifla6_attrs+0x516/0x740 [ 37.472721][ T376] inet6_fill_link_af+0x5e/0xe0 [ 37.472927][ T376] rtnl_fill_ifinfo+0x1612/0x29e0 [ 37.473114][ T376] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 37.473305][ T376] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 37.473538][ T376] rtmsg_ifinfo+0x5b/0xa0 [ 37.473741][ T376] register_netdevice+0x1177/0x1690 [ 37.473929][ T376] register_netdev+0x20/0x40 [ 37.474119][ T376] sit_init_net+0x250/0x4f0 [ 37.474318][ T376] ops_init+0x9b/0x560 [ 37.474470][ T376] register_pernet_operations+0x2db/0x710 [ 37.474715][ T376] register_pernet_device+0x2a/0x60 [ 37.474907][ T376] sit_init+0x23/0xe0 [ 37.475060][ T376] do_one_initcall+0x8d/0x1e0 [ 37.475263][ T376] do_initcalls+0x1b2/0x3e0 [ 37.475456][ T376] kernel_init_freeable+0x232/0x310 [ 37.475654][ T376] kernel_init+0x20/0x200 [ 37.475853][ T376] ret_from_fork+0x31/0x70 [ 37.476046][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.476239][ T376] IN-SOFTIRQ-W at: [ 37.476359][ T376] __lock_acquire+0x797/0x1570 [ 37.476556][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.476749][ T376] _raw_write_lock+0x30/0x40 [ 37.476947][ T376] addrconf_rs_timer+0xa9/0x730 [ 37.477149][ T376] call_timer_fn+0x13b/0x230 [ 37.477349][ T376] __run_timers+0x545/0x810 [ 37.477542][ T376] run_timer_softirq+0xe8/0x1b0 [ 37.477830][ T376] __do_softirq+0x1f8/0x5df [ 37.478026][ T376] irq_exit_rcu+0x97/0xc0 [ 37.478221][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.478532][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.478764][ T376] default_idle+0xf/0x20 [ 37.478952][ T376] default_idle_call+0x6d/0xb0 [ 37.479228][ T376] cpuidle_idle_call+0x1f4/0x280 [ 37.479420][ T376] do_idle+0xf9/0x160 [ 37.479580][ T376] cpu_startup_entry+0x54/0x60 [ 37.479772][ T376] start_secondary+0x21c/0x2b0 [ 37.480060][ T376] common_startup_64+0x12c/0x138 [ 37.480255][ T376] IN-SOFTIRQ-R at: [ 37.480369][ T376] __lock_acquire+0x797/0x1570 [ 37.480572][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.480766][ T376] _raw_read_lock_bh+0x44/0x80 [ 37.480959][ T376] ipv6_get_lladdr+0xa9/0x3e0 [ 37.481153][ T376] addrconf_rs_timer+0x24a/0x730 [ 37.481434][ T376] call_timer_fn+0x13b/0x230 [ 37.481626][ T376] __run_timers+0x545/0x810 [ 37.481821][ T376] run_timer_softirq+0xe8/0x1b0 [ 37.482097][ T376] __do_softirq+0x1f8/0x5df [ 37.482288][ T376] irq_exit_rcu+0x97/0xc0 [ 37.482482][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.482717][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.483043][ T376] default_idle+0xf/0x20 [ 37.483235][ T376] default_idle_call+0x6d/0xb0 [ 37.483433][ T376] cpuidle_idle_call+0x1f4/0x280 [ 37.483704][ T376] do_idle+0xf9/0x160 [ 37.483863][ T376] cpu_startup_entry+0x54/0x60 [ 37.484057][ T376] start_secondary+0x21c/0x2b0 [ 37.484336][ T376] common_startup_64+0x12c/0x138 [ 37.484525][ T376] INITIAL USE at: [ 37.484641][ T376] __lock_acquire+0x797/0x1570 [ 37.484836][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.485110][ T376] _raw_write_lock_bh+0x38/0x50 [ 37.485301][ T376] addrconf_permanent_addr+0x6e/0x670 [ 37.485498][ T376] addrconf_notify+0x749/0xd60 [ 37.485689][ T376] notifier_call_chain+0xcd/0x150 [ 37.485962][ T376] __dev_notify_flags+0xe6/0x250 [ 37.486156][ T376] dev_change_flags+0xec/0x160 [ 37.486346][ T376] do_setlink+0x7d6/0x21e0 [ 37.486620][ T376] __rtnl_newlink+0xaa7/0xd80 [ 37.486812][ T376] rtnl_newlink+0x63/0xa0 [ 37.487005][ T376] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 37.487356][ T376] netlink_rcv_skb+0x130/0x360 [ 37.487551][ T376] netlink_unicast+0x449/0x710 [ 37.487745][ T376] netlink_sendmsg+0x723/0xbe0 [ 37.487938][ T376] ____sys_sendmsg+0x7b2/0xa10 [ 37.488215][ T376] ___sys_sendmsg+0xee/0x170 [ 37.488416][ T376] __sys_sendmsg+0xcd/0x170 [ 37.488614][ T376] do_syscall_64+0xc6/0x1e0 [ 37.488894][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.489130][ T376] INITIAL READ USE at: [ 37.489244][ T376] __lock_acquire+0x797/0x1570 [ 37.489441][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.489641][ T376] _raw_read_lock_bh+0x44/0x80 [ 37.489838][ T376] inet6_fill_ifla6_attrs+0x516/0x740 [ 37.490083][ T376] inet6_fill_link_af+0x5e/0xe0 [ 37.490362][ T376] rtnl_fill_ifinfo+0x1612/0x29e0 [ 37.490556][ T376] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 37.490785][ T376] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 37.491102][ T376] rtmsg_ifinfo+0x5b/0xa0 [ 37.491294][ T376] register_netdevice+0x1177/0x1690 [ 37.491526][ T376] register_netdev+0x20/0x40 [ 37.491801][ T376] sit_init_net+0x250/0x4f0 [ 37.491995][ T376] ops_init+0x9b/0x560 [ 37.492186][ T376] register_pernet_operations+0x2db/0x710 [ 37.492499][ T376] register_pernet_device+0x2a/0x60 [ 37.492723][ T376] sit_init+0x23/0xe0 [ 37.492926][ T376] do_one_initcall+0x8d/0x1e0 [ 37.493124][ T376] do_initcalls+0x1b2/0x3e0 [ 37.493398][ T376] kernel_init_freeable+0x232/0x310 [ 37.493628][ T376] kernel_init+0x20/0x200 [ 37.493832][ T376] ret_from_fork+0x31/0x70 [ 37.494110][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.494300][ T376] } [ 37.494386][ T376] ... key at: [] __key.37+0x0/0x40 [ 37.494617][ T376] [ 37.494617][ T376] the dependencies between the lock to be acquired [ 37.494619][ T376] and SOFTIRQ-irq-unsafe lock: [ 37.495107][ T376] -> (&p->alloc_lock){+.+.}-{2:2} { [ 37.495269][ T376] HARDIRQ-ON-W at: [ 37.495468][ T376] __lock_acquire+0x797/0x1570 [ 37.495664][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.495853][ T376] _raw_spin_lock+0x30/0x40 [ 37.496043][ T376] set_mems_allowed+0x1d/0x210 [ 37.496314][ T376] kernel_init_freeable+0x72/0x310 [ 37.496510][ T376] kernel_init+0x20/0x200 [ 37.496727][ T376] ret_from_fork+0x31/0x70 [ 37.497002][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.497196][ T376] SOFTIRQ-ON-W at: [ 37.497310][ T376] __lock_acquire+0x797/0x1570 [ 37.497498][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.497768][ T376] _raw_spin_lock+0x30/0x40 [ 37.497954][ T376] set_mems_allowed+0x1d/0x210 [ 37.498146][ T376] kernel_init_freeable+0x72/0x310 [ 37.498419][ T376] kernel_init+0x20/0x200 [ 37.498608][ T376] ret_from_fork+0x31/0x70 [ 37.498801][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.498992][ T376] INITIAL USE at: [ 37.499278][ T376] __lock_acquire+0x797/0x1570 [ 37.499470][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.499670][ T376] _raw_spin_lock+0x30/0x40 [ 37.499861][ T376] set_mems_allowed+0x1d/0x210 [ 37.500134][ T376] kernel_init_freeable+0x72/0x310 [ 37.500326][ T376] kernel_init+0x20/0x200 [ 37.500529][ T376] ret_from_fork+0x31/0x70 [ 37.500799][ T376] ret_from_fork_asm+0x1a/0x30 [ 37.500997][ T376] } [ 37.501078][ T376] ... key at: [] __key.387+0x0/0x40 [ 37.501312][ T376] ... acquired at: [ 37.501507][ T376] check_prev_add+0x194/0xce0 [ 37.501665][ T376] validate_chain+0x71d/0x9b0 [ 37.501822][ T376] __lock_acquire+0xaf0/0x1570 [ 37.501973][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.502210][ T376] _raw_spin_lock+0x30/0x40 [ 37.502359][ T376] __get_task_comm+0x27/0x70 [ 37.502529][ T376] ref_tracker_alloc+0x2ee/0x490 [ 37.502685][ T376] netdev_get_by_index+0x5e/0x80 [ 37.502856][ T376] fib6_nh_init+0x3d8/0x15b0 [ 37.503095][ T376] ip6_route_info_create+0xf18/0x17d0 [ 37.503247][ T376] addrconf_f6i_alloc+0x265/0x560 [ 37.503403][ T376] __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.503558][ T376] addrconf_join_anycast+0x1c0/0x220 [ 37.503797][ T376] dev_forward_change+0x2a6/0x7b0 [ 37.503953][ T376] addrconf_fixup_forwarding+0x23f/0x460 [ 37.504145][ T376] addrconf_sysctl_forward+0x212/0x2b0 [ 37.504299][ T376] proc_sys_call_handler+0x403/0x5e0 [ 37.504535][ T376] vfs_write+0x9e5/0x10a0 [ 37.504692][ T376] ksys_write+0xf5/0x1e0 [ 37.504846][ T376] do_syscall_64+0xc6/0x1e0 [ 37.505000][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.505277][ T376] [ 37.505354][ T376] [ 37.505354][ T376] stack backtrace: [ 37.505544][ T376] CPU: 0 PID: 376 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 37.505778][ T376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 37.506212][ T376] Call Trace: [ 37.506332][ T376] [ 37.506411][ T376] dump_stack_lvl+0x82/0xd0 [ 37.506575][ T376] print_bad_irq_dependency+0x957/0xd40 [ 37.506727][ T376] ? hlock_class+0x4e/0x130 [ 37.506894][ T376] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 37.507082][ T376] ? __pfx_usage_skip+0x10/0x10 [ 37.507237][ T376] ? __bfs+0x246/0x650 [ 37.507439][ T376] ? __pfx_usage_match+0x10/0x10 [ 37.507594][ T376] check_irq_usage+0x596/0x850 [ 37.507751][ T376] ? __pfx_check_irq_usage+0x10/0x10 [ 37.507907][ T376] ? __bfs+0x246/0x650 [ 37.508113][ T376] ? __pfx_hlock_conflict+0x10/0x10 [ 37.508274][ T376] ? check_path.constprop.0+0x24/0x50 [ 37.508427][ T376] ? check_noncircular+0x14c/0x3e0 [ 37.508584][ T376] ? __pfx_check_noncircular+0x10/0x10 [ 37.508739][ T376] ? check_prev_add+0x194/0xce0 [ 37.508980][ T376] check_prev_add+0x194/0xce0 [ 37.509134][ T376] ? validate_chain+0x130/0x9b0 [ 37.509295][ T376] validate_chain+0x71d/0x9b0 [ 37.509450][ T376] ? mark_lock+0x38/0x3e0 [ 37.509571][ T376] ? __pfx_validate_chain+0x10/0x10 [ 37.509728][ T376] ? hlock_class+0x4e/0x130 [ 37.509878][ T376] ? mark_lock+0x38/0x3e0 [ 37.509996][ T376] __lock_acquire+0xaf0/0x1570 [ 37.510153][ T376] lock_acquire.part.0+0xeb/0x330 [ 37.510392][ T376] ? __get_task_comm+0x27/0x70 [ 37.510549][ T376] ? mark_lock+0x38/0x3e0 [ 37.510667][ T376] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 37.510825][ T376] ? trace_lock_acquire+0x135/0x1c0 [ 37.511159][ T376] ? __get_task_comm+0x27/0x70 [ 37.511310][ T376] ? lock_acquire+0x32/0xc0 [ 37.511466][ T376] ? __get_task_comm+0x27/0x70 [ 37.511624][ T376] _raw_spin_lock+0x30/0x40 [ 37.511863][ T376] ? __get_task_comm+0x27/0x70 [ 37.512020][ T376] __get_task_comm+0x27/0x70 [ 37.512171][ T376] ref_tracker_alloc+0x2ee/0x490 [ 37.512332][ T376] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 37.512487][ T376] ? dev_get_by_index+0x177/0x270 [ 37.512645][ T376] ? netdev_get_by_index+0x5e/0x80 [ 37.512798][ T376] ? fib6_nh_init+0x3d8/0x15b0 [ 37.512960][ T376] ? ip6_route_info_create+0xf18/0x17d0 [ 37.513109][ T376] ? addrconf_f6i_alloc+0x265/0x560 [ 37.513347][ T376] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.513502][ T376] ? addrconf_join_anycast+0x1c0/0x220 [ 37.513659][ T376] ? dev_forward_change+0x2a6/0x7b0 [ 37.513813][ T376] ? addrconf_fixup_forwarding+0x23f/0x460 [ 37.514092][ T376] ? addrconf_sysctl_forward+0x212/0x2b0 [ 37.514248][ T376] ? proc_sys_call_handler+0x403/0x5e0 [ 37.514403][ T376] ? vfs_write+0x9e5/0x10a0 [ 37.514555][ T376] ? ksys_write+0xf5/0x1e0 [ 37.514786][ T376] ? do_syscall_64+0xc6/0x1e0 [ 37.514941][ T376] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.515136][ T376] ? dev_get_by_index+0x177/0x270 [ 37.515289][ T376] netdev_get_by_index+0x5e/0x80 [ 37.515518][ T376] fib6_nh_init+0x3d8/0x15b0 [ 37.515672][ T376] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 37.515868][ T376] ? __pfx_fib6_nh_init+0x10/0x10 [ 37.516021][ T376] ? kasan_save_track+0x14/0x30 [ 37.516258][ T376] ? __kasan_kmalloc+0x7f/0x90 [ 37.516411][ T376] ? __kmalloc+0x1d7/0x3c0 [ 37.516571][ T376] ? fib6_get_table+0x116/0x290 [ 37.516724][ T376] ip6_route_info_create+0xf18/0x17d0 [ 37.516956][ T376] ? __lock_release+0x103/0x460 [ 37.517112][ T376] ? __pfx_ip6_route_info_create+0x10/0x10 [ 37.517301][ T376] ? addrconf_f6i_alloc+0x12d/0x560 [ 37.517454][ T376] addrconf_f6i_alloc+0x265/0x560 [ 37.517605][ T376] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 37.517759][ T376] ? do_raw_write_lock+0x122/0x3b0 [ 37.517916][ T376] ? __pfx_do_raw_write_lock+0x10/0x10 [ 37.518067][ T376] ? lock_acquire+0x32/0xc0 [ 37.518220][ T376] __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.518456][ T376] addrconf_join_anycast+0x1c0/0x220 [ 37.518604][ T376] ? mark_lock+0x38/0x3e0 [ 37.518720][ T376] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 37.518906][ T376] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 37.519178][ T376] dev_forward_change+0x2a6/0x7b0 [ 37.519340][ T376] ? __pfx_dev_forward_change+0x10/0x10 [ 37.519492][ T376] addrconf_fixup_forwarding+0x23f/0x460 [ 37.519651][ T376] addrconf_sysctl_forward+0x212/0x2b0 [ 37.519886][ T376] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 37.520091][ T376] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 37.520286][ T376] ? trace_kmalloc+0x2a/0xe0 [ 37.520436][ T376] ? __kmalloc_node+0x220/0x400 [ 37.520680][ T376] ? proc_sys_call_handler+0x30b/0x5e0 [ 37.520836][ T376] proc_sys_call_handler+0x403/0x5e0 [ 37.520993][ T376] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 37.521181][ T376] ? __lock_acquire+0xaf0/0x1570 [ 37.521424][ T376] vfs_write+0x9e5/0x10a0 [ 37.521541][ T376] ? do_user_addr_fault+0x449/0xbe0 [ 37.521699][ T376] ? __pfx_vfs_write+0x10/0x10 [ 37.521852][ T376] ? find_held_lock+0x2c/0x110 [ 37.522094][ T376] ? __pfx___lock_release+0x10/0x10 [ 37.522250][ T376] ? __fget_light+0x53/0x1e0 [ 37.522411][ T376] ksys_write+0xf5/0x1e0 [ 37.522527][ T376] ? __pfx_ksys_write+0x10/0x10 [ 37.522687][ T376] ? do_user_addr_fault+0x4bd/0xbe0 [ 37.523021][ T376] do_syscall_64+0xc6/0x1e0 [ 37.523173][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.523367][ T376] RIP: 0033:0x7f11285fe957 [ 37.523530][ T376] 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 [ 37.524082][ T376] RSP: 002b:00007fffec516318 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 37.524396][ T376] RAX: ffffffffffffffda RBX: 0000561c8ba19360 RCX: 00007f11285fe957 [ 37.524631][ T376] RDX: 0000000000000002 RSI: 0000561c8ba193a0 RDI: 0000000000000005 [ 37.524890][ T376] RBP: 0000561c8ba1b4d0 R08: 0000000000000003 R09: 0000000000000077 [ 37.525203][ T376] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 37.525430][ T376] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f11286b59c0 [ 37.525662][ T376] [ 37.533667][ T376] sysctl (376) used greatest stack depth: 23992 bytes left