[ 30.407023][ T290] [ 30.407197][ T290] ===================================================== [ 30.407385][ T290] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 30.407592][ T290] 6.9.0-rc1-virtme #1 Not tainted [ 30.407744][ T290] ----------------------------------------------------- [ 30.407921][ T290] sysctl/290 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 30.408133][ T290] ffff888006f42c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 30.408395][ T290] [ 30.408395][ T290] and this task is already holding: [ 30.408603][ T290] ffff888005b80d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 30.408861][ T290] which would create a new lock dependency: [ 30.409033][ T290] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 30.409252][ T290] [ 30.409252][ T290] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 30.409491][ T290] (&ndev->lock){++--}-{2:2} [ 30.409495][ T290] [ 30.409495][ T290] ... which became SOFTIRQ-irq-safe at: [ 30.409849][ T290] __lock_acquire+0x797/0x1570 [ 30.409996][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.410139][ T290] _raw_write_lock+0x30/0x40 [ 30.410282][ T290] addrconf_rs_timer+0xa9/0x730 [ 30.410424][ T290] call_timer_fn+0x13b/0x230 [ 30.410567][ T290] __run_timers+0x545/0x810 [ 30.410708][ T290] run_timer_softirq+0xe8/0x1b0 [ 30.410849][ T290] __do_softirq+0x1f8/0x5df [ 30.411000][ T290] irq_exit_rcu+0x97/0xc0 [ 30.411142][ T290] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.411284][ T290] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.411462][ T290] default_idle+0xf/0x20 [ 30.411568][ T290] default_idle_call+0x6d/0xb0 [ 30.411706][ T290] cpuidle_idle_call+0x1f4/0x280 [ 30.411849][ T290] do_idle+0xf9/0x160 [ 30.411955][ T290] cpu_startup_entry+0x54/0x60 [ 30.412094][ T290] rest_init+0x14f/0x260 [ 30.412211][ T290] start_kernel+0x318/0x3d0 [ 30.412356][ T290] x86_64_start_reservations+0x18/0x30 [ 30.412500][ T290] x86_64_start_kernel+0xba/0x110 [ 30.412640][ T290] common_startup_64+0x12c/0x138 [ 30.412781][ T290] [ 30.412781][ T290] to a SOFTIRQ-irq-unsafe lock: [ 30.412952][ T290] (&p->alloc_lock){+.+.}-{2:2} [ 30.412956][ T290] [ 30.412956][ T290] ... which became SOFTIRQ-irq-unsafe at: [ 30.413299][ T290] ... [ 30.413300][ T290] __lock_acquire+0x797/0x1570 [ 30.413510][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.413652][ T290] _raw_spin_lock+0x30/0x40 [ 30.413799][ T290] set_mems_allowed+0x1d/0x210 [ 30.413941][ T290] kernel_init_freeable+0x72/0x310 [ 30.414079][ T290] kernel_init+0x20/0x200 [ 30.414217][ T290] ret_from_fork+0x31/0x70 [ 30.414361][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.414507][ T290] [ 30.414507][ T290] other info that might help us debug this: [ 30.414507][ T290] [ 30.414778][ T290] Possible interrupt unsafe locking scenario: [ 30.414778][ T290] [ 30.414986][ T290] CPU0 CPU1 [ 30.415124][ T290] ---- ---- [ 30.415262][ T290] lock(&p->alloc_lock); [ 30.415369][ T290] local_irq_disable(); [ 30.415548][ T290] lock(&ndev->lock); [ 30.415727][ T290] lock(&p->alloc_lock); [ 30.415904][ T290] [ 30.416011][ T290] lock(&ndev->lock); [ 30.416120][ T290] [ 30.416120][ T290] *** DEADLOCK *** [ 30.416120][ T290] [ 30.416323][ T290] 3 locks held by sysctl/290: [ 30.416463][ T290] #0: ffff8880061213f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 30.416723][ T290] #1: ffffffffae7b7208 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 30.417007][ T290] #2: ffff888005b80d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 30.417256][ T290] [ 30.417256][ T290] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 30.417528][ T290] -> (&ndev->lock){++--}-{2:2} { [ 30.417673][ T290] HARDIRQ-ON-W at: [ 30.417783][ T290] __lock_acquire+0x797/0x1570 [ 30.417961][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.418135][ T290] _raw_write_lock_bh+0x38/0x50 [ 30.418308][ T290] addrconf_permanent_addr+0x6e/0x670 [ 30.418486][ T290] addrconf_notify+0x749/0xd60 [ 30.418659][ T290] notifier_call_chain+0xcd/0x150 [ 30.418840][ T290] __dev_notify_flags+0xe6/0x250 [ 30.419018][ T290] dev_change_flags+0xec/0x160 [ 30.419194][ T290] do_setlink+0x7d6/0x21e0 [ 30.419374][ T290] __rtnl_newlink+0xaa7/0xd80 [ 30.419552][ T290] rtnl_newlink+0x63/0xa0 [ 30.419732][ T290] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 30.419913][ T290] netlink_rcv_skb+0x130/0x360 [ 30.420093][ T290] netlink_unicast+0x449/0x710 [ 30.420274][ T290] netlink_sendmsg+0x723/0xbe0 [ 30.420452][ T290] ____sys_sendmsg+0x7b2/0xa10 [ 30.420634][ T290] ___sys_sendmsg+0xee/0x170 [ 30.420812][ T290] __sys_sendmsg+0xcd/0x170 [ 30.420990][ T290] do_syscall_64+0xc6/0x1e0 [ 30.421170][ T290] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.421382][ T290] HARDIRQ-ON-R at: [ 30.421489][ T290] __lock_acquire+0x797/0x1570 [ 30.421665][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.421841][ T290] _raw_read_lock_bh+0x44/0x80 [ 30.422016][ T290] inet6_fill_ifla6_attrs+0x516/0x740 [ 30.422192][ T290] inet6_fill_link_af+0x5e/0xe0 [ 30.422367][ T290] rtnl_fill_ifinfo+0x1615/0x2a90 [ 30.422541][ T290] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 30.422718][ T290] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 30.422927][ T290] rtmsg_ifinfo+0x5b/0xa0 [ 30.423104][ T290] register_netdevice+0x1177/0x1690 [ 30.423284][ T290] register_netdev+0x20/0x40 [ 30.423459][ T290] vti6_init_net+0x25d/0x380 [ 30.423638][ T290] ops_init+0x9b/0x560 [ 30.423787][ T290] register_pernet_operations+0x2db/0x710 [ 30.424001][ T290] register_pernet_device+0x2a/0x60 [ 30.424176][ T290] vti6_tunnel_init+0x18/0x110 [ 30.424351][ T290] do_one_initcall+0x8d/0x1e0 [ 30.424531][ T290] do_initcalls+0x1b2/0x3e0 [ 30.424704][ T290] kernel_init_freeable+0x232/0x310 [ 30.424879][ T290] kernel_init+0x20/0x200 [ 30.425052][ T290] ret_from_fork+0x31/0x70 [ 30.425230][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.425404][ T290] IN-SOFTIRQ-W at: [ 30.425508][ T290] __lock_acquire+0x797/0x1570 [ 30.425686][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.425862][ T290] _raw_write_lock+0x30/0x40 [ 30.426035][ T290] addrconf_rs_timer+0xa9/0x730 [ 30.426207][ T290] call_timer_fn+0x13b/0x230 [ 30.426391][ T290] __run_timers+0x545/0x810 [ 30.426564][ T290] run_timer_softirq+0xe8/0x1b0 [ 30.426740][ T290] __do_softirq+0x1f8/0x5df [ 30.426917][ T290] irq_exit_rcu+0x97/0xc0 [ 30.427091][ T290] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.427301][ T290] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.427521][ T290] default_idle+0xf/0x20 [ 30.427694][ T290] default_idle_call+0x6d/0xb0 [ 30.427868][ T290] cpuidle_idle_call+0x1f4/0x280 [ 30.428045][ T290] do_idle+0xf9/0x160 [ 30.428189][ T290] cpu_startup_entry+0x54/0x60 [ 30.428364][ T290] rest_init+0x14f/0x260 [ 30.428538][ T290] start_kernel+0x318/0x3d0 [ 30.428716][ T290] x86_64_start_reservations+0x18/0x30 [ 30.428891][ T290] x86_64_start_kernel+0xba/0x110 [ 30.429069][ T290] common_startup_64+0x12c/0x138 [ 30.429243][ T290] IN-SOFTIRQ-R at: [ 30.429349][ T290] __lock_acquire+0x797/0x1570 [ 30.429523][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.429704][ T290] _raw_read_lock_bh+0x44/0x80 [ 30.429889][ T290] ipv6_get_lladdr+0xa9/0x3e0 [ 30.430062][ T290] addrconf_rs_timer+0x24a/0x730 [ 30.430238][ T290] call_timer_fn+0x13b/0x230 [ 30.430412][ T290] __run_timers+0x545/0x810 [ 30.430589][ T290] run_timer_softirq+0xe8/0x1b0 [ 30.430766][ T290] __do_softirq+0x1f8/0x5df [ 30.430940][ T290] irq_exit_rcu+0x97/0xc0 [ 30.431115][ T290] sysvec_apic_timer_interrupt+0x75/0x80 [ 30.431327][ T290] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.431535][ T290] default_idle+0xf/0x20 [ 30.431710][ T290] default_idle_call+0x6d/0xb0 [ 30.431886][ T290] cpuidle_idle_call+0x1f4/0x280 [ 30.432059][ T290] do_idle+0xf9/0x160 [ 30.432198][ T290] cpu_startup_entry+0x54/0x60 [ 30.432378][ T290] rest_init+0x14f/0x260 [ 30.432553][ T290] start_kernel+0x318/0x3d0 [ 30.432730][ T290] x86_64_start_reservations+0x18/0x30 [ 30.432908][ T290] x86_64_start_kernel+0xba/0x110 [ 30.433083][ T290] common_startup_64+0x12c/0x138 [ 30.433263][ T290] INITIAL USE at: [ 30.433367][ T290] __lock_acquire+0x797/0x1570 [ 30.433549][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.433725][ T290] _raw_write_lock_bh+0x38/0x50 [ 30.433920][ T290] addrconf_permanent_addr+0x6e/0x670 [ 30.434099][ T290] addrconf_notify+0x749/0xd60 [ 30.434273][ T290] notifier_call_chain+0xcd/0x150 [ 30.434447][ T290] __dev_notify_flags+0xe6/0x250 [ 30.434627][ T290] dev_change_flags+0xec/0x160 [ 30.434804][ T290] do_setlink+0x7d6/0x21e0 [ 30.434979][ T290] __rtnl_newlink+0xaa7/0xd80 [ 30.435155][ T290] rtnl_newlink+0x63/0xa0 [ 30.435331][ T290] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 30.435506][ T290] netlink_rcv_skb+0x130/0x360 [ 30.435679][ T290] netlink_unicast+0x449/0x710 [ 30.435871][ T290] netlink_sendmsg+0x723/0xbe0 [ 30.436045][ T290] ____sys_sendmsg+0x7b2/0xa10 [ 30.436218][ T290] ___sys_sendmsg+0xee/0x170 [ 30.436392][ T290] __sys_sendmsg+0xcd/0x170 [ 30.436570][ T290] do_syscall_64+0xc6/0x1e0 [ 30.436744][ T290] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.436957][ T290] INITIAL READ USE at: [ 30.437062][ T290] __lock_acquire+0x797/0x1570 [ 30.437241][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.437416][ T290] _raw_read_lock_bh+0x44/0x80 [ 30.437592][ T290] inet6_fill_ifla6_attrs+0x516/0x740 [ 30.437802][ T290] inet6_fill_link_af+0x5e/0xe0 [ 30.437982][ T290] rtnl_fill_ifinfo+0x1615/0x2a90 [ 30.438156][ T290] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 30.438367][ T290] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 30.438575][ T290] rtmsg_ifinfo+0x5b/0xa0 [ 30.438751][ T290] register_netdevice+0x1177/0x1690 [ 30.438961][ T290] register_netdev+0x20/0x40 [ 30.439141][ T290] vti6_init_net+0x25d/0x380 [ 30.439316][ T290] ops_init+0x9b/0x560 [ 30.439493][ T290] register_pernet_operations+0x2db/0x710 [ 30.439704][ T290] register_pernet_device+0x2a/0x60 [ 30.439911][ T290] vti6_tunnel_init+0x18/0x110 [ 30.440085][ T290] do_one_initcall+0x8d/0x1e0 [ 30.440264][ T290] do_initcalls+0x1b2/0x3e0 [ 30.440440][ T290] kernel_init_freeable+0x232/0x310 [ 30.440649][ T290] kernel_init+0x20/0x200 [ 30.440827][ T290] ret_from_fork+0x31/0x70 [ 30.441003][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.441178][ T290] } [ 30.441251][ T290] ... key at: [] __key.37+0x0/0x40 [ 30.441468][ T290] [ 30.441468][ T290] the dependencies between the lock to be acquired [ 30.441470][ T290] and SOFTIRQ-irq-unsafe lock: [ 30.441844][ T290] -> (&p->alloc_lock){+.+.}-{2:2} { [ 30.441990][ T290] HARDIRQ-ON-W at: [ 30.442096][ T290] __lock_acquire+0x797/0x1570 [ 30.442271][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.442449][ T290] _raw_spin_lock+0x30/0x40 [ 30.442625][ T290] set_mems_allowed+0x1d/0x210 [ 30.442802][ T290] kernel_init_freeable+0x72/0x310 [ 30.442975][ T290] kernel_init+0x20/0x200 [ 30.443235][ T290] ret_from_fork+0x31/0x70 [ 30.443409][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.443582][ T290] SOFTIRQ-ON-W at: [ 30.443693][ T290] __lock_acquire+0x797/0x1570 [ 30.443959][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.444133][ T290] _raw_spin_lock+0x30/0x40 [ 30.444306][ T290] set_mems_allowed+0x1d/0x210 [ 30.444560][ T290] kernel_init_freeable+0x72/0x310 [ 30.444741][ T290] kernel_init+0x20/0x200 [ 30.444913][ T290] ret_from_fork+0x31/0x70 [ 30.445089][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.445424][ T290] INITIAL USE at: [ 30.445527][ T290] __lock_acquire+0x797/0x1570 [ 30.445700][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.445886][ T290] _raw_spin_lock+0x30/0x40 [ 30.446142][ T290] set_mems_allowed+0x1d/0x210 [ 30.446315][ T290] kernel_init_freeable+0x72/0x310 [ 30.446493][ T290] kernel_init+0x20/0x200 [ 30.446749][ T290] ret_from_fork+0x31/0x70 [ 30.446925][ T290] ret_from_fork_asm+0x1a/0x30 [ 30.447098][ T290] } [ 30.447169][ T290] ... key at: [] __key.388+0x0/0x40 [ 30.447456][ T290] ... acquired at: [ 30.447561][ T290] check_prev_add+0x194/0xce0 [ 30.447705][ T290] validate_chain+0x71d/0x9b0 [ 30.447849][ T290] __lock_acquire+0xaf0/0x1570 [ 30.448066][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.448204][ T290] _raw_spin_lock+0x30/0x40 [ 30.448341][ T290] __get_task_comm+0x27/0x70 [ 30.448480][ T290] ref_tracker_alloc+0x2ee/0x490 [ 30.448699][ T290] netdev_get_by_index+0x5e/0x80 [ 30.448841][ T290] fib6_nh_init+0x3d8/0x1580 [ 30.448983][ T290] ip6_route_info_create+0xf18/0x17d0 [ 30.449121][ T290] addrconf_f6i_alloc+0x265/0x560 [ 30.449259][ T290] __ipv6_dev_ac_inc+0x25f/0xb10 [ 30.449478][ T290] addrconf_join_anycast+0x1c0/0x220 [ 30.449615][ T290] dev_forward_change+0x2a6/0x7b0 [ 30.449756][ T290] addrconf_fixup_forwarding+0x23f/0x460 [ 30.449927][ T290] addrconf_sysctl_forward+0x212/0x2b0 [ 30.450146][ T290] proc_sys_call_handler+0x403/0x5e0 [ 30.450284][ T290] vfs_write+0x9e5/0x10a0 [ 30.450421][ T290] ksys_write+0xf5/0x1e0 [ 30.450559][ T290] do_syscall_64+0xc6/0x1e0 [ 30.450782][ T290] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.450952][ T290] [ 30.451023][ T290] [ 30.451023][ T290] stack backtrace: [ 30.451190][ T290] CPU: 1 PID: 290 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 30.451401][ T290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 30.451707][ T290] Call Trace: [ 30.451818][ T290] [ 30.451970][ T290] dump_stack_lvl+0x82/0xd0 [ 30.452112][ T290] print_bad_irq_dependency+0x957/0xd40 [ 30.452251][ T290] ? hlock_class+0x4e/0x130 [ 30.452392][ T290] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 30.452641][ T290] ? __pfx_usage_skip+0x10/0x10 [ 30.452787][ T290] ? __bfs+0x246/0x650 [ 30.452891][ T290] ? __pfx_usage_match+0x10/0x10 [ 30.453029][ T290] check_irq_usage+0x596/0x850 [ 30.453172][ T290] ? __pfx_check_irq_usage+0x10/0x10 [ 30.453387][ T290] ? __bfs+0x246/0x650 [ 30.453491][ T290] ? __pfx_hlock_conflict+0x10/0x10 [ 30.453632][ T290] ? check_path.constprop.0+0x24/0x50 [ 30.453779][ T290] ? check_noncircular+0x14c/0x3e0 [ 30.454008][ T290] ? __pfx_check_noncircular+0x10/0x10 [ 30.454149][ T290] ? check_prev_add+0x194/0xce0 [ 30.454287][ T290] check_prev_add+0x194/0xce0 [ 30.454424][ T290] ? validate_chain+0x130/0x9b0 [ 30.454562][ T290] validate_chain+0x71d/0x9b0 [ 30.454784][ T290] ? mark_lock+0x38/0x3e0 [ 30.454888][ T290] ? __pfx_validate_chain+0x10/0x10 [ 30.455025][ T290] ? hlock_class+0x4e/0x130 [ 30.455164][ T290] ? mark_lock+0x38/0x3e0 [ 30.455347][ T290] __lock_acquire+0xaf0/0x1570 [ 30.455487][ T290] lock_acquire.part.0+0xeb/0x330 [ 30.455628][ T290] ? __get_task_comm+0x27/0x70 [ 30.455767][ T290] ? mark_lock+0x38/0x3e0 [ 30.455871][ T290] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.456164][ T290] ? trace_lock_acquire+0x135/0x1c0 [ 30.456306][ T290] ? __get_task_comm+0x27/0x70 [ 30.456442][ T290] ? lock_acquire+0x32/0xc0 [ 30.456586][ T290] ? __get_task_comm+0x27/0x70 [ 30.456819][ T290] _raw_spin_lock+0x30/0x40 [ 30.456956][ T290] ? __get_task_comm+0x27/0x70 [ 30.457093][ T290] __get_task_comm+0x27/0x70 [ 30.457235][ T290] ref_tracker_alloc+0x2ee/0x490 [ 30.457372][ T290] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 30.457516][ T290] ? dev_get_by_index+0x177/0x270 [ 30.457655][ T290] ? netdev_get_by_index+0x5e/0x80 [ 30.457791][ T290] ? fib6_nh_init+0x3d8/0x1580 [ 30.457941][ T290] ? ip6_route_info_create+0xf18/0x17d0 [ 30.458159][ T290] ? addrconf_f6i_alloc+0x265/0x560 [ 30.458295][ T290] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 30.458432][ T290] ? addrconf_join_anycast+0x1c0/0x220 [ 30.458571][ T290] ? dev_forward_change+0x2a6/0x7b0 [ 30.458789][ T290] ? addrconf_fixup_forwarding+0x23f/0x460 [ 30.458959][ T290] ? addrconf_sysctl_forward+0x212/0x2b0 [ 30.459105][ T290] ? proc_sys_call_handler+0x403/0x5e0 [ 30.459241][ T290] ? vfs_write+0x9e5/0x10a0 [ 30.459379][ T290] ? ksys_write+0xf5/0x1e0 [ 30.459519][ T290] ? do_syscall_64+0xc6/0x1e0 [ 30.459655][ T290] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.459825][ T290] ? dev_get_by_index+0x177/0x270 [ 30.460041][ T290] netdev_get_by_index+0x5e/0x80 [ 30.460177][ T290] fib6_nh_init+0x3d8/0x1580 [ 30.460317][ T290] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 30.460491][ T290] ? __pfx_fib6_nh_init+0x10/0x10 [ 30.460708][ T290] ? kasan_save_track+0x14/0x30 [ 30.460848][ T290] ? __kasan_kmalloc+0x7f/0x90 [ 30.460986][ T290] ? __kmalloc+0x1d7/0x3c0 [ 30.461124][ T290] ? fib6_get_table+0x116/0x290 [ 30.461343][ T290] ip6_route_info_create+0xf18/0x17d0 [ 30.461489][ T290] ? __lock_release+0x103/0x460 [ 30.461627][ T290] ? __pfx_ip6_route_info_create+0x10/0x10 [ 30.461802][ T290] ? addrconf_f6i_alloc+0x12d/0x560 [ 30.462018][ T290] addrconf_f6i_alloc+0x265/0x560 [ 30.462160][ T290] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 30.462300][ T290] ? do_raw_write_lock+0x122/0x3b0 [ 30.462441][ T290] ? __pfx_do_raw_write_lock+0x10/0x10 [ 30.462655][ T290] ? lock_acquire+0x32/0xc0 [ 30.462794][ T290] __ipv6_dev_ac_inc+0x25f/0xb10 [ 30.462936][ T290] addrconf_join_anycast+0x1c0/0x220 [ 30.463073][ T290] ? mark_lock+0x38/0x3e0 [ 30.463177][ T290] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 30.463426][ T290] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 30.463600][ T290] dev_forward_change+0x2a6/0x7b0 [ 30.463739][ T290] ? __pfx_dev_forward_change+0x10/0x10 [ 30.463894][ T290] addrconf_fixup_forwarding+0x23f/0x460 [ 30.464112][ T290] addrconf_sysctl_forward+0x212/0x2b0 [ 30.464254][ T290] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 30.464431][ T290] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 30.464679][ T290] ? trace_kmalloc+0x2a/0xe0 [ 30.464815][ T290] ? __kmalloc_node+0x220/0x400 [ 30.464953][ T290] ? proc_sys_call_handler+0x30b/0x5e0 [ 30.465089][ T290] proc_sys_call_handler+0x403/0x5e0 [ 30.465232][ T290] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 30.465489][ T290] ? __lock_acquire+0xaf0/0x1570 [ 30.465628][ T290] vfs_write+0x9e5/0x10a0 [ 30.465732][ T290] ? do_user_addr_fault+0x449/0xbe0 [ 30.465871][ T290] ? __pfx_vfs_write+0x10/0x10 [ 30.466089][ T290] ? find_held_lock+0x2c/0x110 [ 30.466227][ T290] ? __pfx___lock_release+0x10/0x10 [ 30.466371][ T290] ? __fget_light+0x53/0x1e0 [ 30.466514][ T290] ksys_write+0xf5/0x1e0 [ 30.466792][ T290] ? __pfx_ksys_write+0x10/0x10 [ 30.466935][ T290] ? do_user_addr_fault+0x4bd/0xbe0 [ 30.467072][ T290] do_syscall_64+0xc6/0x1e0 [ 30.467208][ T290] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 30.467381][ T290] RIP: 0033:0x7fc7af797957 [ 30.467529][ T290] 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 [ 30.468111][ T290] RSP: 002b:00007ffee9fef028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.468321][ T290] RAX: ffffffffffffffda RBX: 0000555ebba01360 RCX: 00007fc7af797957 [ 30.468530][ T290] RDX: 0000000000000002 RSI: 0000555ebba013a0 RDI: 0000000000000005 [ 30.468828][ T290] RBP: 0000555ebba034d0 R08: 0000000000000003 R09: 0000000000000077 [ 30.469032][ T290] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 30.469240][ T290] R13: 0000000000000002 R14: 0000000000000002 R15: 00007fc7af84e9c0 [ 30.469453][ T290] [ 32.695414][ T312] Mirror/redirect action on