[ 28.186351][ T295] 8021q: 802.1Q VLAN Support v1.8 [ 29.258615][ T307] gre: GRE over IPv4 demultiplexor driver [ 29.274266][ T307] ip_gre: GRE over IPv4 tunneling driver [ 29.596880][ T313] ip (313) used greatest stack depth: 23384 bytes left [ 36.166466][ T373] GACT probability NOT on [ 37.895903][ T389] [ 37.896031][ T389] ===================================================== [ 37.896223][ T389] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 37.896452][ T389] 6.9.0-rc1-virtme #1 Not tainted [ 37.896604][ T389] ----------------------------------------------------- [ 37.896799][ T389] sysctl/389 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 37.897032][ T389] ffff888007930968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 37.897312][ T389] [ 37.897312][ T389] and this task is already holding: [ 37.897533][ T389] ffff8880057b0d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 37.897806][ T389] which would create a new lock dependency: [ 37.897994][ T389] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 37.898224][ T389] [ 37.898224][ T389] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 37.898480][ T389] (&ndev->lock){++--}-{2:2} [ 37.898484][ T389] [ 37.898484][ T389] ... which became SOFTIRQ-irq-safe at: [ 37.898851][ T389] __lock_acquire+0x797/0x1570 [ 37.899005][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.899154][ T389] _raw_write_lock+0x30/0x40 [ 37.899310][ T389] addrconf_rs_timer+0xa9/0x730 [ 37.899462][ T389] call_timer_fn+0x13b/0x230 [ 37.899619][ T389] __run_timers+0x545/0x810 [ 37.899769][ T389] run_timer_softirq+0xe8/0x1b0 [ 37.899923][ T389] __do_softirq+0x1f8/0x5df [ 37.900075][ T389] irq_exit_rcu+0x97/0xc0 [ 37.900227][ T389] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.900377][ T389] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.900572][ T389] _raw_spin_unlock_irqrestore+0x43/0x70 [ 37.900722][ T389] debug_object_active_state+0x2df/0x3e0 [ 37.900928][ T389] __call_rcu_common.constprop.0+0x49/0x830 [ 37.901109][ T389] kmem_cache_free+0x1ac/0x220 [ 37.901258][ T389] __vm_area_free+0x38/0x50 [ 37.901400][ T389] exit_mmap+0x38e/0x7d0 [ 37.901504][ T389] __mmput+0x76/0x3b0 [ 37.901610][ T389] exit_mm+0x146/0x1d0 [ 37.901716][ T389] do_exit+0x6b6/0xcf0 [ 37.901825][ T389] do_group_exit+0xb8/0x260 [ 37.901965][ T389] __x64_sys_exit_group+0x3e/0x50 [ 37.902111][ T389] do_syscall_64+0xc6/0x1e0 [ 37.902252][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.902427][ T389] [ 37.902427][ T389] to a SOFTIRQ-irq-unsafe lock: [ 37.902597][ T389] (&p->alloc_lock){+.+.}-{2:2} [ 37.902601][ T389] [ 37.902601][ T389] ... which became SOFTIRQ-irq-unsafe at: [ 37.902938][ T389] ... [ 37.902939][ T389] __lock_acquire+0x797/0x1570 [ 37.903160][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.903301][ T389] _raw_spin_lock+0x30/0x40 [ 37.903442][ T389] set_mems_allowed+0x1d/0x210 [ 37.903582][ T389] kernel_init_freeable+0x72/0x310 [ 37.903727][ T389] kernel_init+0x20/0x200 [ 37.903878][ T389] ret_from_fork+0x31/0x70 [ 37.904019][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.904158][ T389] [ 37.904158][ T389] other info that might help us debug this: [ 37.904158][ T389] [ 37.904434][ T389] Possible interrupt unsafe locking scenario: [ 37.904434][ T389] [ 37.904644][ T389] CPU0 CPU1 [ 37.904781][ T389] ---- ---- [ 37.904926][ T389] lock(&p->alloc_lock); [ 37.905033][ T389] local_irq_disable(); [ 37.905202][ T389] lock(&ndev->lock); [ 37.905378][ T389] lock(&p->alloc_lock); [ 37.905551][ T389] [ 37.905658][ T389] lock(&ndev->lock); [ 37.905761][ T389] [ 37.905761][ T389] *** DEADLOCK *** [ 37.905761][ T389] [ 37.905961][ T389] 3 locks held by sysctl/389: [ 37.906102][ T389] #0: ffff8880330e93f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 37.906353][ T389] #1: ffffffff867969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 37.906642][ T389] #2: ffff8880057b0d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 37.906887][ T389] [ 37.906887][ T389] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 37.907153][ T389] -> (&ndev->lock){++--}-{2:2} { [ 37.907300][ T389] HARDIRQ-ON-W at: [ 37.907408][ T389] __lock_acquire+0x797/0x1570 [ 37.907592][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.907768][ T389] _raw_write_lock_bh+0x38/0x50 [ 37.907947][ T389] addrconf_permanent_addr+0x6e/0x670 [ 37.908120][ T389] addrconf_notify+0x749/0xd60 [ 37.908297][ T389] notifier_call_chain+0xcd/0x150 [ 37.908477][ T389] __dev_notify_flags+0xe6/0x250 [ 37.908657][ T389] dev_change_flags+0xec/0x160 [ 37.908832][ T389] do_setlink+0x7d6/0x21e0 [ 37.909012][ T389] __rtnl_newlink+0xaa7/0xd80 [ 37.909190][ T389] rtnl_newlink+0x63/0xa0 [ 37.909365][ T389] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 37.909540][ T389] netlink_rcv_skb+0x130/0x360 [ 37.909724][ T389] netlink_unicast+0x449/0x710 [ 37.909899][ T389] netlink_sendmsg+0x723/0xbe0 [ 37.910074][ T389] ____sys_sendmsg+0x7b2/0xa10 [ 37.910251][ T389] ___sys_sendmsg+0xee/0x170 [ 37.910426][ T389] __sys_sendmsg+0xcd/0x170 [ 37.910603][ T389] do_syscall_64+0xc6/0x1e0 [ 37.910779][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.910996][ T389] HARDIRQ-ON-R at: [ 37.911101][ T389] __lock_acquire+0x797/0x1570 [ 37.911274][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.911450][ T389] _raw_read_lock_bh+0x44/0x80 [ 37.911626][ T389] inet6_fill_ifla6_attrs+0x516/0x740 [ 37.911803][ T389] inet6_fill_link_af+0x5e/0xe0 [ 37.911974][ T389] rtnl_fill_ifinfo+0x1612/0x29e0 [ 37.912158][ T389] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 37.912334][ T389] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 37.912544][ T389] rtmsg_ifinfo+0x5b/0xa0 [ 37.912722][ T389] register_netdevice+0x1177/0x1690 [ 37.912896][ T389] register_netdev+0x20/0x40 [ 37.913070][ T389] sit_init_net+0x250/0x4f0 [ 37.913251][ T389] ops_init+0x9b/0x560 [ 37.913391][ T389] register_pernet_operations+0x2db/0x710 [ 37.913598][ T389] register_pernet_device+0x2a/0x60 [ 37.913771][ T389] sit_init+0x23/0xe0 [ 37.913936][ T389] do_one_initcall+0x8d/0x1e0 [ 37.914115][ T389] do_initcalls+0x1b2/0x3e0 [ 37.914293][ T389] kernel_init_freeable+0x232/0x310 [ 37.914470][ T389] kernel_init+0x20/0x200 [ 37.914645][ T389] ret_from_fork+0x31/0x70 [ 37.914822][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.914997][ T389] IN-SOFTIRQ-W at: [ 37.915105][ T389] __lock_acquire+0x797/0x1570 [ 37.915279][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.915458][ T389] _raw_write_lock+0x30/0x40 [ 37.915634][ T389] addrconf_rs_timer+0xa9/0x730 [ 37.915806][ T389] call_timer_fn+0x13b/0x230 [ 37.915981][ T389] __run_timers+0x545/0x810 [ 37.916151][ T389] run_timer_softirq+0xe8/0x1b0 [ 37.916323][ T389] __do_softirq+0x1f8/0x5df [ 37.916496][ T389] irq_exit_rcu+0x97/0xc0 [ 37.916666][ T389] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.916874][ T389] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.917077][ T389] _raw_spin_unlock_irqrestore+0x43/0x70 [ 37.917280][ T389] debug_object_active_state+0x2df/0x3e0 [ 37.917486][ T389] __call_rcu_common.constprop.0+0x49/0x830 [ 37.917698][ T389] kmem_cache_free+0x1ac/0x220 [ 37.917871][ T389] __vm_area_free+0x38/0x50 [ 37.918042][ T389] exit_mmap+0x38e/0x7d0 [ 37.918211][ T389] __mmput+0x76/0x3b0 [ 37.918347][ T389] exit_mm+0x146/0x1d0 [ 37.918488][ T389] do_exit+0x6b6/0xcf0 [ 37.918626][ T389] do_group_exit+0xb8/0x260 [ 37.918800][ T389] __x64_sys_exit_group+0x3e/0x50 [ 37.918969][ T389] do_syscall_64+0xc6/0x1e0 [ 37.919142][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.919348][ T389] IN-SOFTIRQ-R at: [ 37.919451][ T389] __lock_acquire+0x797/0x1570 [ 37.919620][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.919793][ T389] _raw_read_lock_bh+0x44/0x80 [ 37.919967][ T389] ipv6_get_lladdr+0xa9/0x3e0 [ 37.920139][ T389] addrconf_rs_timer+0x24a/0x730 [ 37.920310][ T389] call_timer_fn+0x13b/0x230 [ 37.920479][ T389] __run_timers+0x545/0x810 [ 37.920648][ T389] run_timer_softirq+0xe8/0x1b0 [ 37.920817][ T389] __do_softirq+0x1f8/0x5df [ 37.920992][ T389] irq_exit_rcu+0x97/0xc0 [ 37.921164][ T389] sysvec_apic_timer_interrupt+0x75/0x80 [ 37.921365][ T389] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 37.921652][ T389] _raw_spin_unlock_irqrestore+0x43/0x70 [ 37.921854][ T389] debug_object_active_state+0x2df/0x3e0 [ 37.922058][ T389] __call_rcu_common.constprop.0+0x49/0x830 [ 37.922346][ T389] kmem_cache_free+0x1ac/0x220 [ 37.922515][ T389] __vm_area_free+0x38/0x50 [ 37.922683][ T389] exit_mmap+0x38e/0x7d0 [ 37.922936][ T389] __mmput+0x76/0x3b0 [ 37.923072][ T389] exit_mm+0x146/0x1d0 [ 37.923208][ T389] do_exit+0x6b6/0xcf0 [ 37.923344][ T389] do_group_exit+0xb8/0x260 [ 37.923598][ T389] __x64_sys_exit_group+0x3e/0x50 [ 37.923767][ T389] do_syscall_64+0xc6/0x1e0 [ 37.923945][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.924308][ T389] INITIAL USE at: [ 37.924410][ T389] __lock_acquire+0x797/0x1570 [ 37.924578][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.924752][ T389] _raw_write_lock_bh+0x38/0x50 [ 37.925008][ T389] addrconf_permanent_addr+0x6e/0x670 [ 37.925176][ T389] addrconf_notify+0x749/0xd60 [ 37.925345][ T389] notifier_call_chain+0xcd/0x150 [ 37.925515][ T389] __dev_notify_flags+0xe6/0x250 [ 37.925764][ T389] dev_change_flags+0xec/0x160 [ 37.925935][ T389] do_setlink+0x7d6/0x21e0 [ 37.926107][ T389] __rtnl_newlink+0xaa7/0xd80 [ 37.926356][ T389] rtnl_newlink+0x63/0xa0 [ 37.926525][ T389] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 37.926693][ T389] netlink_rcv_skb+0x130/0x360 [ 37.926947][ T389] netlink_unicast+0x449/0x710 [ 37.927114][ T389] netlink_sendmsg+0x723/0xbe0 [ 37.927287][ T389] ____sys_sendmsg+0x7b2/0xa10 [ 37.927456][ T389] ___sys_sendmsg+0xee/0x170 [ 37.927706][ T389] __sys_sendmsg+0xcd/0x170 [ 37.927882][ T389] do_syscall_64+0xc6/0x1e0 [ 37.928050][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.928333][ T389] INITIAL READ USE at: [ 37.928434][ T389] __lock_acquire+0x797/0x1570 [ 37.928605][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.928777][ T389] _raw_read_lock_bh+0x44/0x80 [ 37.929029][ T389] inet6_fill_ifla6_attrs+0x516/0x740 [ 37.929231][ T389] inet6_fill_link_af+0x5e/0xe0 [ 37.929399][ T389] rtnl_fill_ifinfo+0x1612/0x29e0 [ 37.929648][ T389] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 37.929860][ T389] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 37.930061][ T389] rtmsg_ifinfo+0x5b/0xa0 [ 37.930311][ T389] register_netdevice+0x1177/0x1690 [ 37.930512][ T389] register_netdev+0x20/0x40 [ 37.930680][ T389] sit_init_net+0x250/0x4f0 [ 37.930931][ T389] ops_init+0x9b/0x560 [ 37.931102][ T389] register_pernet_operations+0x2db/0x710 [ 37.931304][ T389] register_pernet_device+0x2a/0x60 [ 37.931586][ T389] sit_init+0x23/0xe0 [ 37.931759][ T389] do_one_initcall+0x8d/0x1e0 [ 37.931928][ T389] do_initcalls+0x1b2/0x3e0 [ 37.932095][ T389] kernel_init_freeable+0x232/0x310 [ 37.932383][ T389] kernel_init+0x20/0x200 [ 37.932552][ T389] ret_from_fork+0x31/0x70 [ 37.932724][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.932989][ T389] } [ 37.933060][ T389] ... key at: [] __key.37+0x0/0x40 [ 37.933263][ T389] [ 37.933263][ T389] the dependencies between the lock to be acquired [ 37.933265][ T389] and SOFTIRQ-irq-unsafe lock: [ 37.933632][ T389] -> (&p->alloc_lock){+.+.}-{2:2} { [ 37.933772][ T389] HARDIRQ-ON-W at: [ 37.933890][ T389] __lock_acquire+0x797/0x1570 [ 37.934144][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.934313][ T389] _raw_spin_lock+0x30/0x40 [ 37.934482][ T389] set_mems_allowed+0x1d/0x210 [ 37.934657][ T389] kernel_init_freeable+0x72/0x310 [ 37.934921][ T389] kernel_init+0x20/0x200 [ 37.935089][ T389] ret_from_fork+0x31/0x70 [ 37.935257][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.935427][ T389] SOFTIRQ-ON-W at: [ 37.935531][ T389] __lock_acquire+0x797/0x1570 [ 37.935699][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.935871][ T389] _raw_spin_lock+0x30/0x40 [ 37.936040][ T389] set_mems_allowed+0x1d/0x210 [ 37.936207][ T389] kernel_init_freeable+0x72/0x310 [ 37.936385][ T389] kernel_init+0x20/0x200 [ 37.936636][ T389] ret_from_fork+0x31/0x70 [ 37.936902][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.937076][ T389] INITIAL USE at: [ 37.937181][ T389] __lock_acquire+0x797/0x1570 [ 37.937431][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.937603][ T389] _raw_spin_lock+0x30/0x40 [ 37.937773][ T389] set_mems_allowed+0x1d/0x210 [ 37.937947][ T389] kernel_init_freeable+0x72/0x310 [ 37.938195][ T389] kernel_init+0x20/0x200 [ 37.938366][ T389] ret_from_fork+0x31/0x70 [ 37.938537][ T389] ret_from_fork_asm+0x1a/0x30 [ 37.938787][ T389] } [ 37.938867][ T389] ... key at: [] __key.387+0x0/0x40 [ 37.939072][ T389] ... acquired at: [ 37.939173][ T389] check_prev_add+0x194/0xce0 [ 37.939390][ T389] validate_chain+0x71d/0x9b0 [ 37.939527][ T389] __lock_acquire+0xaf0/0x1570 [ 37.939661][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.939802][ T389] _raw_spin_lock+0x30/0x40 [ 37.939937][ T389] __get_task_comm+0x27/0x70 [ 37.940154][ T389] ref_tracker_alloc+0x2ee/0x490 [ 37.940290][ T389] netdev_get_by_index+0x5e/0x80 [ 37.940429][ T389] fib6_nh_init+0x3d8/0x15b0 [ 37.940565][ T389] ip6_route_info_create+0xf18/0x17d0 [ 37.940782][ T389] addrconf_f6i_alloc+0x265/0x560 [ 37.940919][ T389] __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.941056][ T389] addrconf_join_anycast+0x1c0/0x220 [ 37.941191][ T389] dev_forward_change+0x2a6/0x7b0 [ 37.941410][ T389] addrconf_fixup_forwarding+0x23f/0x460 [ 37.941578][ T389] addrconf_sysctl_forward+0x212/0x2b0 [ 37.941714][ T389] proc_sys_call_handler+0x403/0x5e0 [ 37.941850][ T389] vfs_write+0x9e5/0x10a0 [ 37.942066][ T389] ksys_write+0xf5/0x1e0 [ 37.942206][ T389] do_syscall_64+0xc6/0x1e0 [ 37.942342][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.942509][ T389] [ 37.942578][ T389] [ 37.942578][ T389] stack backtrace: [ 37.942822][ T389] CPU: 0 PID: 389 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 37.943024][ T389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 37.943406][ T389] Call Trace: [ 37.943509][ T389] [ 37.943581][ T389] dump_stack_lvl+0x82/0xd0 [ 37.943720][ T389] print_bad_irq_dependency+0x957/0xd40 [ 37.943866][ T389] ? hlock_class+0x4e/0x130 [ 37.944084][ T389] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 37.944254][ T389] ? __pfx_usage_skip+0x10/0x10 [ 37.944387][ T389] ? __bfs+0x246/0x650 [ 37.944489][ T389] ? __pfx_usage_match+0x10/0x10 [ 37.944711][ T389] check_irq_usage+0x596/0x850 [ 37.944847][ T389] ? __pfx_check_irq_usage+0x10/0x10 [ 37.944981][ T389] ? __bfs+0x246/0x650 [ 37.945083][ T389] ? __pfx_hlock_conflict+0x10/0x10 [ 37.945222][ T389] ? check_path.constprop.0+0x24/0x50 [ 37.945515][ T389] ? check_noncircular+0x14c/0x3e0 [ 37.945649][ T389] ? __pfx_check_noncircular+0x10/0x10 [ 37.945788][ T389] ? check_prev_add+0x194/0xce0 [ 37.945924][ T389] check_prev_add+0x194/0xce0 [ 37.946140][ T389] ? validate_chain+0x130/0x9b0 [ 37.946278][ T389] validate_chain+0x71d/0x9b0 [ 37.946418][ T389] ? mark_lock+0x38/0x3e0 [ 37.946520][ T389] ? __pfx_validate_chain+0x10/0x10 [ 37.946734][ T389] ? hlock_class+0x4e/0x130 [ 37.946868][ T389] ? mark_lock+0x38/0x3e0 [ 37.946971][ T389] __lock_acquire+0xaf0/0x1570 [ 37.947109][ T389] lock_acquire.part.0+0xeb/0x330 [ 37.947248][ T389] ? __get_task_comm+0x27/0x70 [ 37.947463][ T389] ? mark_lock+0x38/0x3e0 [ 37.947565][ T389] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 37.947701][ T389] ? trace_lock_acquire+0x135/0x1c0 [ 37.947835][ T389] ? __get_task_comm+0x27/0x70 [ 37.948051][ T389] ? lock_acquire+0x32/0xc0 [ 37.948186][ T389] ? __get_task_comm+0x27/0x70 [ 37.948323][ T389] _raw_spin_lock+0x30/0x40 [ 37.948457][ T389] ? __get_task_comm+0x27/0x70 [ 37.948594][ T389] __get_task_comm+0x27/0x70 [ 37.948808][ T389] ref_tracker_alloc+0x2ee/0x490 [ 37.948944][ T389] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 37.949077][ T389] ? dev_get_by_index+0x177/0x270 [ 37.949214][ T389] ? netdev_get_by_index+0x5e/0x80 [ 37.949428][ T389] ? fib6_nh_init+0x3d8/0x15b0 [ 37.949562][ T389] ? ip6_route_info_create+0xf18/0x17d0 [ 37.949696][ T389] ? addrconf_f6i_alloc+0x265/0x560 [ 37.949832][ T389] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.950045][ T389] ? addrconf_join_anycast+0x1c0/0x220 [ 37.950181][ T389] ? dev_forward_change+0x2a6/0x7b0 [ 37.950315][ T389] ? addrconf_fixup_forwarding+0x23f/0x460 [ 37.950481][ T389] ? addrconf_sysctl_forward+0x212/0x2b0 [ 37.950700][ T389] ? proc_sys_call_handler+0x403/0x5e0 [ 37.950835][ T389] ? vfs_write+0x9e5/0x10a0 [ 37.950974][ T389] ? ksys_write+0xf5/0x1e0 [ 37.951110][ T389] ? do_syscall_64+0xc6/0x1e0 [ 37.951323][ T389] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.951491][ T389] ? dev_get_by_index+0x177/0x270 [ 37.951627][ T389] netdev_get_by_index+0x5e/0x80 [ 37.951761][ T389] fib6_nh_init+0x3d8/0x15b0 [ 37.951976][ T389] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 37.952147][ T389] ? __pfx_fib6_nh_init+0x10/0x10 [ 37.952283][ T389] ? kasan_save_track+0x14/0x30 [ 37.952418][ T389] ? __kasan_kmalloc+0x7f/0x90 [ 37.952633][ T389] ? __kmalloc+0x1d7/0x3c0 [ 37.952769][ T389] ? fib6_get_table+0x116/0x290 [ 37.952904][ T389] ip6_route_info_create+0xf18/0x17d0 [ 37.953041][ T389] ? __lock_release+0x103/0x460 [ 37.953178][ T389] ? __pfx_ip6_route_info_create+0x10/0x10 [ 37.953427][ T389] ? addrconf_f6i_alloc+0x12d/0x560 [ 37.953562][ T389] addrconf_f6i_alloc+0x265/0x560 [ 37.953699][ T389] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 37.953836][ T389] ? do_raw_write_lock+0x122/0x3b0 [ 37.954062][ T389] ? __pfx_do_raw_write_lock+0x10/0x10 [ 37.954196][ T389] ? lock_acquire+0x32/0xc0 [ 37.954331][ T389] __ipv6_dev_ac_inc+0x25f/0xb10 [ 37.954468][ T389] addrconf_join_anycast+0x1c0/0x220 [ 37.954684][ T389] ? mark_lock+0x38/0x3e0 [ 37.954786][ T389] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 37.954960][ T389] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 37.955128][ T389] dev_forward_change+0x2a6/0x7b0 [ 37.955346][ T389] ? __pfx_dev_forward_change+0x10/0x10 [ 37.955484][ T389] addrconf_fixup_forwarding+0x23f/0x460 [ 37.955621][ T389] addrconf_sysctl_forward+0x212/0x2b0 [ 37.955756][ T389] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 37.956086][ T389] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 37.956254][ T389] ? trace_kmalloc+0x2a/0xe0 [ 37.956387][ T389] ? __kmalloc_node+0x220/0x400 [ 37.956521][ T389] ? proc_sys_call_handler+0x30b/0x5e0 [ 37.956737][ T389] proc_sys_call_handler+0x403/0x5e0 [ 37.956872][ T389] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 37.957042][ T389] ? __lock_acquire+0xaf0/0x1570 [ 37.957179][ T389] vfs_write+0x9e5/0x10a0 [ 37.957363][ T389] ? do_user_addr_fault+0x449/0xbe0 [ 37.957502][ T389] ? __pfx_vfs_write+0x10/0x10 [ 37.957638][ T389] ? find_held_lock+0x2c/0x110 [ 37.957773][ T389] ? __pfx___lock_release+0x10/0x10 [ 37.957991][ T389] ? __fget_light+0x53/0x1e0 [ 37.958127][ T389] ksys_write+0xf5/0x1e0 [ 37.958229][ T389] ? __pfx_ksys_write+0x10/0x10 [ 37.958364][ T389] ? do_user_addr_fault+0x4bd/0xbe0 [ 37.958498][ T389] do_syscall_64+0xc6/0x1e0 [ 37.958715][ T389] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 37.958882][ T389] RIP: 0033:0x7f3f70f0f957 [ 37.959028][ T389] 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 [ 37.959590][ T389] RSP: 002b:00007fff58e73b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 37.959799][ T389] RAX: ffffffffffffffda RBX: 0000559c1a7c4360 RCX: 00007f3f70f0f957 [ 37.960087][ T389] RDX: 0000000000000002 RSI: 0000559c1a7c43a0 RDI: 0000000000000005 [ 37.960288][ T389] RBP: 0000559c1a7c64d0 R08: 0000000000000003 R09: 0000000000000077 [ 37.960489][ T389] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 37.960775][ T389] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f3f70fc69c0 [ 37.960985][ T389]