[ 31.657588][ T297] 8021q: 802.1Q VLAN Support v1.8 [ 32.748365][ T308] gre: GRE over IPv4 demultiplexor driver [ 32.768458][ T308] ip_gre: GRE over IPv4 tunneling driver [ 33.139287][ T314] ip (314) used greatest stack depth: 23968 bytes left [ 39.791498][ T374] GACT probability NOT on [ 41.659773][ T390] [ 41.659910][ T390] ===================================================== [ 41.660104][ T390] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 41.660327][ T390] 6.9.0-rc1-virtme #1 Not tainted [ 41.660479][ T390] ----------------------------------------------------- [ 41.660666][ T390] sysctl/390 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 41.660893][ T390] ffff8880079a4ee8 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 41.661183][ T390] [ 41.661183][ T390] and this task is already holding: [ 41.661411][ T390] ffff8880056aa580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 41.661681][ T390] which would create a new lock dependency: [ 41.661869][ T390] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 41.662109][ T390] [ 41.662109][ T390] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 41.662363][ T390] (&ndev->lock){++--}-{2:2} [ 41.662367][ T390] [ 41.662367][ T390] ... which became SOFTIRQ-irq-safe at: [ 41.662743][ T390] __lock_acquire+0x797/0x1570 [ 41.662898][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.663047][ T390] _raw_write_lock+0x30/0x40 [ 41.663200][ T390] addrconf_rs_timer+0xa9/0x730 [ 41.663351][ T390] call_timer_fn+0x13b/0x230 [ 41.663503][ T390] __run_timers+0x545/0x810 [ 41.663655][ T390] run_timer_softirq+0xe8/0x1b0 [ 41.663840][ T390] __do_softirq+0x1f8/0x5df [ 41.663985][ T390] irq_exit_rcu+0x97/0xc0 [ 41.664126][ T390] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.664266][ T390] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.664444][ T390] _raw_spin_unlock_irqrestore+0x43/0x70 [ 41.664584][ T390] get_partial_node.part.0+0x1c5/0x3a0 [ 41.664723][ T390] ___slab_alloc+0xb70/0x10a0 [ 41.664869][ T390] kmem_cache_alloc+0x243/0x270 [ 41.665017][ T390] vm_area_dup+0x20/0x150 [ 41.665158][ T390] __split_vma+0x131/0xd10 [ 41.665309][ T390] do_vmi_align_munmap.constprop.0+0x2c0/0x10a0 [ 41.665487][ T390] mmap_region+0x15c/0x2110 [ 41.665629][ T390] do_mmap+0x622/0xc70 [ 41.665738][ T390] vm_mmap_pgoff+0x113/0x2f0 [ 41.665880][ T390] ksys_mmap_pgoff+0x290/0x410 [ 41.666023][ T390] do_syscall_64+0xc6/0x1e0 [ 41.666177][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.666373][ T390] [ 41.666373][ T390] to a SOFTIRQ-irq-unsafe lock: [ 41.666544][ T390] (&p->alloc_lock){+.+.}-{2:2} [ 41.666549][ T390] [ 41.666549][ T390] ... which became SOFTIRQ-irq-unsafe at: [ 41.666911][ T390] ... [ 41.666913][ T390] __lock_acquire+0x797/0x1570 [ 41.667132][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.667271][ T390] _raw_spin_lock+0x30/0x40 [ 41.667414][ T390] set_mems_allowed+0x1d/0x210 [ 41.667559][ T390] kernel_init_freeable+0x72/0x310 [ 41.667703][ T390] kernel_init+0x20/0x200 [ 41.667842][ T390] ret_from_fork+0x31/0x70 [ 41.667988][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.668126][ T390] [ 41.668126][ T390] other info that might help us debug this: [ 41.668126][ T390] [ 41.668404][ T390] Possible interrupt unsafe locking scenario: [ 41.668404][ T390] [ 41.668609][ T390] CPU0 CPU1 [ 41.668752][ T390] ---- ---- [ 41.668894][ T390] lock(&p->alloc_lock); [ 41.669001][ T390] local_irq_disable(); [ 41.669168][ T390] lock(&ndev->lock); [ 41.669347][ T390] lock(&p->alloc_lock); [ 41.669520][ T390] [ 41.669629][ T390] lock(&ndev->lock); [ 41.669740][ T390] [ 41.669740][ T390] *** DEADLOCK *** [ 41.669740][ T390] [ 41.669957][ T390] 3 locks held by sysctl/390: [ 41.670095][ T390] #0: ffff888005e793f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 41.670354][ T390] #1: ffffffffb73969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 41.670648][ T390] #2: ffff8880056aa580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 41.670908][ T390] [ 41.670908][ T390] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 41.671180][ T390] -> (&ndev->lock){++--}-{2:2} { [ 41.671334][ T390] HARDIRQ-ON-W at: [ 41.671441][ T390] __lock_acquire+0x797/0x1570 [ 41.671626][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.671816][ T390] _raw_write_lock_bh+0x38/0x50 [ 41.672004][ T390] addrconf_permanent_addr+0x6e/0x670 [ 41.672181][ T390] addrconf_notify+0x749/0xd60 [ 41.672361][ T390] notifier_call_chain+0xcd/0x150 [ 41.672555][ T390] __dev_notify_flags+0xe6/0x250 [ 41.672732][ T390] dev_change_flags+0xec/0x160 [ 41.672916][ T390] do_setlink+0x7d6/0x21e0 [ 41.673105][ T390] __rtnl_newlink+0xaa7/0xd80 [ 41.673290][ T390] rtnl_newlink+0x63/0xa0 [ 41.673463][ T390] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 41.673664][ T390] netlink_rcv_skb+0x130/0x360 [ 41.673849][ T390] netlink_unicast+0x449/0x710 [ 41.674030][ T390] netlink_sendmsg+0x723/0xbe0 [ 41.674214][ T390] ____sys_sendmsg+0x7b2/0xa10 [ 41.674399][ T390] ___sys_sendmsg+0xee/0x170 [ 41.674587][ T390] __sys_sendmsg+0xcd/0x170 [ 41.674769][ T390] do_syscall_64+0xc6/0x1e0 [ 41.674956][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.675172][ T390] HARDIRQ-ON-R at: [ 41.675282][ T390] __lock_acquire+0x797/0x1570 [ 41.675460][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.675654][ T390] _raw_read_lock_bh+0x44/0x80 [ 41.675834][ T390] inet6_fill_ifla6_attrs+0x516/0x740 [ 41.676015][ T390] inet6_fill_link_af+0x5e/0xe0 [ 41.676195][ T390] rtnl_fill_ifinfo+0x1612/0x29e0 [ 41.676385][ T390] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 41.676567][ T390] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 41.676798][ T390] rtmsg_ifinfo+0x5b/0xa0 [ 41.676983][ T390] register_netdevice+0x1177/0x1690 [ 41.677174][ T390] register_netdev+0x20/0x40 [ 41.677357][ T390] sit_init_net+0x250/0x4f0 [ 41.677538][ T390] ops_init+0x9b/0x560 [ 41.677682][ T390] register_pernet_operations+0x2db/0x710 [ 41.677934][ T390] register_pernet_device+0x2a/0x60 [ 41.678125][ T390] sit_init+0x23/0xe0 [ 41.678276][ T390] do_one_initcall+0x8d/0x1e0 [ 41.678463][ T390] do_initcalls+0x1b2/0x3e0 [ 41.678656][ T390] kernel_init_freeable+0x232/0x310 [ 41.678843][ T390] kernel_init+0x20/0x200 [ 41.679037][ T390] ret_from_fork+0x31/0x70 [ 41.679227][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.679421][ T390] IN-SOFTIRQ-W at: [ 41.679536][ T390] __lock_acquire+0x797/0x1570 [ 41.679729][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.679919][ T390] _raw_write_lock+0x30/0x40 [ 41.680128][ T390] addrconf_rs_timer+0xa9/0x730 [ 41.680328][ T390] call_timer_fn+0x13b/0x230 [ 41.680526][ T390] __run_timers+0x545/0x810 [ 41.680722][ T390] run_timer_softirq+0xe8/0x1b0 [ 41.680917][ T390] __do_softirq+0x1f8/0x5df [ 41.681111][ T390] irq_exit_rcu+0x97/0xc0 [ 41.681305][ T390] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.681624][ T390] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.681854][ T390] _raw_spin_unlock_irqrestore+0x43/0x70 [ 41.682178][ T390] get_partial_node.part.0+0x1c5/0x3a0 [ 41.682370][ T390] ___slab_alloc+0xb70/0x10a0 [ 41.682558][ T390] kmem_cache_alloc+0x243/0x270 [ 41.682758][ T390] vm_area_dup+0x20/0x150 [ 41.683035][ T390] __split_vma+0x131/0xd10 [ 41.683229][ T390] do_vmi_align_munmap.constprop.0+0x2c0/0x10a0 [ 41.683459][ T390] mmap_region+0x15c/0x2110 [ 41.683734][ T390] do_mmap+0x622/0xc70 [ 41.683889][ T390] vm_mmap_pgoff+0x113/0x2f0 [ 41.684086][ T390] ksys_mmap_pgoff+0x290/0x410 [ 41.684284][ T390] do_syscall_64+0xc6/0x1e0 [ 41.684560][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.684790][ T390] IN-SOFTIRQ-R at: [ 41.684905][ T390] __lock_acquire+0x797/0x1570 [ 41.685185][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.685377][ T390] _raw_read_lock_bh+0x44/0x80 [ 41.685571][ T390] ipv6_get_lladdr+0xa9/0x3e0 [ 41.685761][ T390] addrconf_rs_timer+0x24a/0x730 [ 41.686048][ T390] call_timer_fn+0x13b/0x230 [ 41.686239][ T390] __run_timers+0x545/0x810 [ 41.686433][ T390] run_timer_softirq+0xe8/0x1b0 [ 41.686724][ T390] __do_softirq+0x1f8/0x5df [ 41.686914][ T390] irq_exit_rcu+0x97/0xc0 [ 41.687105][ T390] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.687501][ T390] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.687729][ T390] _raw_spin_unlock_irqrestore+0x43/0x70 [ 41.687956][ T390] get_partial_node.part.0+0x1c5/0x3a0 [ 41.688227][ T390] ___slab_alloc+0xb70/0x10a0 [ 41.688413][ T390] kmem_cache_alloc+0x243/0x270 [ 41.688611][ T390] vm_area_dup+0x20/0x150 [ 41.688805][ T390] __split_vma+0x131/0xd10 [ 41.689101][ T390] do_vmi_align_munmap.constprop.0+0x2c0/0x10a0 [ 41.689329][ T390] mmap_region+0x15c/0x2110 [ 41.689521][ T390] do_mmap+0x622/0xc70 [ 41.689679][ T390] vm_mmap_pgoff+0x113/0x2f0 [ 41.689871][ T390] ksys_mmap_pgoff+0x290/0x410 [ 41.690060][ T390] do_syscall_64+0xc6/0x1e0 [ 41.690263][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.690492][ T390] INITIAL USE at: [ 41.690605][ T390] __lock_acquire+0x797/0x1570 [ 41.690795][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.691091][ T390] _raw_write_lock_bh+0x38/0x50 [ 41.691285][ T390] addrconf_permanent_addr+0x6e/0x670 [ 41.691478][ T390] addrconf_notify+0x749/0xd60 [ 41.691672][ T390] notifier_call_chain+0xcd/0x150 [ 41.691864][ T390] __dev_notify_flags+0xe6/0x250 [ 41.692055][ T390] dev_change_flags+0xec/0x160 [ 41.692244][ T390] do_setlink+0x7d6/0x21e0 [ 41.692436][ T390] __rtnl_newlink+0xaa7/0xd80 [ 41.692628][ T390] rtnl_newlink+0x63/0xa0 [ 41.692822][ T390] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 41.693098][ T390] netlink_rcv_skb+0x130/0x360 [ 41.693290][ T390] netlink_unicast+0x449/0x710 [ 41.693481][ T390] netlink_sendmsg+0x723/0xbe0 [ 41.693673][ T390] ____sys_sendmsg+0x7b2/0xa10 [ 41.693944][ T390] ___sys_sendmsg+0xee/0x170 [ 41.694139][ T390] __sys_sendmsg+0xcd/0x170 [ 41.694326][ T390] do_syscall_64+0xc6/0x1e0 [ 41.694593][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.694815][ T390] INITIAL READ USE at: [ 41.694927][ T390] __lock_acquire+0x797/0x1570 [ 41.695116][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.695407][ T390] _raw_read_lock_bh+0x44/0x80 [ 41.695596][ T390] inet6_fill_ifla6_attrs+0x516/0x740 [ 41.695807][ T390] inet6_fill_link_af+0x5e/0xe0 [ 41.696083][ T390] rtnl_fill_ifinfo+0x1612/0x29e0 [ 41.696260][ T390] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 41.696480][ T390] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 41.696708][ T390] rtmsg_ifinfo+0x5b/0xa0 [ 41.696892][ T390] register_netdevice+0x1177/0x1690 [ 41.697101][ T390] register_netdev+0x20/0x40 [ 41.697282][ T390] sit_init_net+0x250/0x4f0 [ 41.697468][ T390] ops_init+0x9b/0x560 [ 41.697642][ T390] register_pernet_operations+0x2db/0x710 [ 41.697943][ T390] register_pernet_device+0x2a/0x60 [ 41.698160][ T390] sit_init+0x23/0xe0 [ 41.698338][ T390] do_one_initcall+0x8d/0x1e0 [ 41.698680][ T390] do_initcalls+0x1b2/0x3e0 [ 41.698866][ T390] kernel_init_freeable+0x232/0x310 [ 41.699084][ T390] kernel_init+0x20/0x200 [ 41.699263][ T390] ret_from_fork+0x31/0x70 [ 41.699532][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.699715][ T390] } [ 41.699789][ T390] ... key at: [] __key.37+0x0/0x40 [ 41.700080][ T390] [ 41.700080][ T390] the dependencies between the lock to be acquired [ 41.700081][ T390] and SOFTIRQ-irq-unsafe lock: [ 41.700463][ T390] -> (&p->alloc_lock){+.+.}-{2:2} { [ 41.700615][ T390] HARDIRQ-ON-W at: [ 41.700806][ T390] __lock_acquire+0x797/0x1570 [ 41.700988][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.701168][ T390] _raw_spin_lock+0x30/0x40 [ 41.701345][ T390] set_mems_allowed+0x1d/0x210 [ 41.701601][ T390] kernel_init_freeable+0x72/0x310 [ 41.701774][ T390] kernel_init+0x20/0x200 [ 41.701953][ T390] ret_from_fork+0x31/0x70 [ 41.702213][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.702385][ T390] SOFTIRQ-ON-W at: [ 41.702488][ T390] __lock_acquire+0x797/0x1570 [ 41.702661][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.702924][ T390] _raw_spin_lock+0x30/0x40 [ 41.703096][ T390] set_mems_allowed+0x1d/0x210 [ 41.703275][ T390] kernel_init_freeable+0x72/0x310 [ 41.703534][ T390] kernel_init+0x20/0x200 [ 41.703716][ T390] ret_from_fork+0x31/0x70 [ 41.703892][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.704072][ T390] INITIAL USE at: [ 41.704258][ T390] __lock_acquire+0x797/0x1570 [ 41.704435][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.704616][ T390] _raw_spin_lock+0x30/0x40 [ 41.704876][ T390] set_mems_allowed+0x1d/0x210 [ 41.705052][ T390] kernel_init_freeable+0x72/0x310 [ 41.705232][ T390] kernel_init+0x20/0x200 [ 41.705407][ T390] ret_from_fork+0x31/0x70 [ 41.705665][ T390] ret_from_fork_asm+0x1a/0x30 [ 41.705845][ T390] } [ 41.705922][ T390] ... key at: [] __key.387+0x0/0x40 [ 41.706133][ T390] ... acquired at: [ 41.706316][ T390] check_prev_add+0x194/0xce0 [ 41.706455][ T390] validate_chain+0x71d/0x9b0 [ 41.706596][ T390] __lock_acquire+0xaf0/0x1570 [ 41.706874][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.707097][ T390] _raw_spin_lock+0x30/0x40 [ 41.707234][ T390] __get_task_comm+0x27/0x70 [ 41.707376][ T390] ref_tracker_alloc+0x2ee/0x490 [ 41.707523][ T390] netdev_get_by_index+0x5e/0x80 [ 41.707741][ T390] fib6_nh_init+0x3d8/0x15b0 [ 41.707881][ T390] ip6_route_info_create+0xf18/0x17d0 [ 41.708025][ T390] addrconf_f6i_alloc+0x265/0x560 [ 41.708166][ T390] __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.708304][ T390] addrconf_join_anycast+0x1c0/0x220 [ 41.708527][ T390] dev_forward_change+0x2a6/0x7b0 [ 41.708674][ T390] addrconf_fixup_forwarding+0x23f/0x460 [ 41.708847][ T390] addrconf_sysctl_forward+0x212/0x2b0 [ 41.708989][ T390] proc_sys_call_handler+0x403/0x5e0 [ 41.709207][ T390] vfs_write+0x9e5/0x10a0 [ 41.709346][ T390] ksys_write+0xf5/0x1e0 [ 41.709484][ T390] do_syscall_64+0xc6/0x1e0 [ 41.709622][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.709967][ T390] [ 41.710074][ T390] [ 41.710074][ T390] stack backtrace: [ 41.710264][ T390] CPU: 3 PID: 390 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 41.710490][ T390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.710904][ T390] Call Trace: [ 41.711018][ T390] [ 41.711096][ T390] dump_stack_lvl+0x82/0xd0 [ 41.711335][ T390] print_bad_irq_dependency+0x957/0xd40 [ 41.711488][ T390] ? hlock_class+0x4e/0x130 [ 41.711644][ T390] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 41.711833][ T390] ? __pfx_usage_skip+0x10/0x10 [ 41.712062][ T390] ? __bfs+0x246/0x650 [ 41.712177][ T390] ? __pfx_usage_match+0x10/0x10 [ 41.712336][ T390] check_irq_usage+0x596/0x850 [ 41.712487][ T390] ? __pfx_check_irq_usage+0x10/0x10 [ 41.712640][ T390] ? __bfs+0x246/0x650 [ 41.712842][ T390] ? __pfx_hlock_conflict+0x10/0x10 [ 41.712994][ T390] ? check_path.constprop.0+0x24/0x50 [ 41.713142][ T390] ? check_noncircular+0x14c/0x3e0 [ 41.713292][ T390] ? __pfx_check_noncircular+0x10/0x10 [ 41.713533][ T390] ? check_prev_add+0x194/0xce0 [ 41.713686][ T390] check_prev_add+0x194/0xce0 [ 41.713835][ T390] ? validate_chain+0x130/0x9b0 [ 41.713983][ T390] validate_chain+0x71d/0x9b0 [ 41.714138][ T390] ? mark_lock+0x38/0x3e0 [ 41.714335][ T390] ? __pfx_validate_chain+0x10/0x10 [ 41.714485][ T390] ? hlock_class+0x4e/0x130 [ 41.714633][ T390] ? mark_lock+0x38/0x3e0 [ 41.714747][ T390] __lock_acquire+0xaf0/0x1570 [ 41.714993][ T390] lock_acquire.part.0+0xeb/0x330 [ 41.715148][ T390] ? __get_task_comm+0x27/0x70 [ 41.715298][ T390] ? mark_lock+0x38/0x3e0 [ 41.715413][ T390] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.715569][ T390] ? trace_lock_acquire+0x135/0x1c0 [ 41.715723][ T390] ? __get_task_comm+0x27/0x70 [ 41.715873][ T390] ? lock_acquire+0x32/0xc0 [ 41.716028][ T390] ? __get_task_comm+0x27/0x70 [ 41.716180][ T390] _raw_spin_lock+0x30/0x40 [ 41.716334][ T390] ? __get_task_comm+0x27/0x70 [ 41.716484][ T390] __get_task_comm+0x27/0x70 [ 41.716643][ T390] ref_tracker_alloc+0x2ee/0x490 [ 41.716805][ T390] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 41.716958][ T390] ? dev_get_by_index+0x177/0x270 [ 41.717110][ T390] ? netdev_get_by_index+0x5e/0x80 [ 41.717257][ T390] ? fib6_nh_init+0x3d8/0x15b0 [ 41.717408][ T390] ? ip6_route_info_create+0xf18/0x17d0 [ 41.717566][ T390] ? addrconf_f6i_alloc+0x265/0x560 [ 41.717716][ T390] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.717867][ T390] ? addrconf_join_anycast+0x1c0/0x220 [ 41.718023][ T390] ? dev_forward_change+0x2a6/0x7b0 [ 41.718172][ T390] ? addrconf_fixup_forwarding+0x23f/0x460 [ 41.718366][ T390] ? addrconf_sysctl_forward+0x212/0x2b0 [ 41.718522][ T390] ? proc_sys_call_handler+0x403/0x5e0 [ 41.718673][ T390] ? vfs_write+0x9e5/0x10a0 [ 41.718822][ T390] ? ksys_write+0xf5/0x1e0 [ 41.718974][ T390] ? do_syscall_64+0xc6/0x1e0 [ 41.719141][ T390] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.719335][ T390] ? dev_get_by_index+0x177/0x270 [ 41.719485][ T390] netdev_get_by_index+0x5e/0x80 [ 41.719639][ T390] fib6_nh_init+0x3d8/0x15b0 [ 41.719791][ T390] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 41.719987][ T390] ? __pfx_fib6_nh_init+0x10/0x10 [ 41.720125][ T390] ? kasan_save_track+0x14/0x30 [ 41.720271][ T390] ? __kasan_kmalloc+0x7f/0x90 [ 41.720410][ T390] ? __kmalloc+0x1d7/0x3c0 [ 41.720554][ T390] ? fib6_get_table+0x116/0x290 [ 41.720697][ T390] ip6_route_info_create+0xf18/0x17d0 [ 41.720850][ T390] ? __lock_release+0x103/0x460 [ 41.720991][ T390] ? __pfx_ip6_route_info_create+0x10/0x10 [ 41.721163][ T390] ? addrconf_f6i_alloc+0x12d/0x560 [ 41.721303][ T390] addrconf_f6i_alloc+0x265/0x560 [ 41.721449][ T390] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 41.721593][ T390] ? do_raw_write_lock+0x122/0x3b0 [ 41.721741][ T390] ? __pfx_do_raw_write_lock+0x10/0x10 [ 41.721880][ T390] ? lock_acquire+0x32/0xc0 [ 41.722034][ T390] __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.722176][ T390] addrconf_join_anycast+0x1c0/0x220 [ 41.722321][ T390] ? mark_lock+0x38/0x3e0 [ 41.722427][ T390] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 41.722605][ T390] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 41.722780][ T390] dev_forward_change+0x2a6/0x7b0 [ 41.722929][ T390] ? __pfx_dev_forward_change+0x10/0x10 [ 41.723074][ T390] addrconf_fixup_forwarding+0x23f/0x460 [ 41.723216][ T390] addrconf_sysctl_forward+0x212/0x2b0 [ 41.723362][ T390] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 41.723537][ T390] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 41.723716][ T390] ? trace_kmalloc+0x2a/0xe0 [ 41.723855][ T390] ? __kmalloc_node+0x220/0x400 [ 41.724005][ T390] ? proc_sys_call_handler+0x30b/0x5e0 [ 41.724143][ T390] proc_sys_call_handler+0x403/0x5e0 [ 41.724284][ T390] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 41.724456][ T390] ? __lock_acquire+0xaf0/0x1570 [ 41.724596][ T390] vfs_write+0x9e5/0x10a0 [ 41.724701][ T390] ? do_user_addr_fault+0x449/0xbe0 [ 41.724839][ T390] ? __pfx_vfs_write+0x10/0x10 [ 41.724976][ T390] ? find_held_lock+0x2c/0x110 [ 41.725125][ T390] ? __pfx___lock_release+0x10/0x10 [ 41.725262][ T390] ? __fget_light+0x53/0x1e0 [ 41.725415][ T390] ksys_write+0xf5/0x1e0 [ 41.725520][ T390] ? __pfx_ksys_write+0x10/0x10 [ 41.725661][ T390] ? do_user_addr_fault+0x4bd/0xbe0 [ 41.725797][ T390] do_syscall_64+0xc6/0x1e0 [ 41.725977][ T390] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.726163][ T390] RIP: 0033:0x7fa570f17957 [ 41.726326][ T390] 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 [ 41.726864][ T390] RSP: 002b:00007ffc77cead58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.727095][ T390] RAX: ffffffffffffffda RBX: 0000556265df6360 RCX: 00007fa570f17957 [ 41.727316][ T390] RDX: 0000000000000002 RSI: 0000556265df63a0 RDI: 0000000000000005 [ 41.727546][ T390] RBP: 0000556265df84d0 R08: 0000000000000003 R09: 0000000000000077 [ 41.727771][ T390] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 41.728000][ T390] R13: 0000000000000002 R14: 0000000000000002 R15: 00007fa570fce9c0 [ 41.728227][ T390]