[ 24.404965][ T236] ip (236) used greatest stack depth: 23328 bytes left [ 30.679117][ T311] gre: GRE over IPv4 demultiplexor driver [ 30.737554][ T311] ip6_gre: GRE over IPv6 tunneling driver [ 32.868435][ T333] 8021q: 802.1Q VLAN Support v1.8 [ 36.928889][ T371] GACT probability NOT on [ 40.451570][ T404] [ 40.451691][ T404] ===================================================== [ 40.451889][ T404] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 40.452112][ T404] 6.9.0-rc1-virtme #1 Not tainted [ 40.452260][ T404] ----------------------------------------------------- [ 40.452453][ T404] sysctl/404 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 40.452671][ T404] ffff8880072b0968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 40.452954][ T404] [ 40.452954][ T404] and this task is already holding: [ 40.453179][ T404] ffff888005cb3d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 40.453446][ T404] which would create a new lock dependency: [ 40.453655][ T404] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 40.453870][ T404] [ 40.453870][ T404] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 40.454105][ T404] (&ndev->lock){++--}-{2:2} [ 40.454109][ T404] [ 40.454109][ T404] ... which became SOFTIRQ-irq-safe at: [ 40.454443][ T404] __lock_acquire+0x797/0x1570 [ 40.454588][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.454727][ T404] _raw_write_lock+0x30/0x40 [ 40.454876][ T404] addrconf_rs_timer+0xa9/0x730 [ 40.455014][ T404] call_timer_fn+0x13b/0x230 [ 40.455153][ T404] __run_timers+0x545/0x810 [ 40.455290][ T404] run_timer_softirq+0xe8/0x1b0 [ 40.455427][ T404] __do_softirq+0x1f8/0x5df [ 40.455564][ T404] irq_exit_rcu+0x97/0xc0 [ 40.455703][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.455841][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.456014][ T404] unwind_next_frame+0x1f4/0x1d00 [ 40.456154][ T404] arch_stack_walk+0x8c/0xf0 [ 40.456292][ T404] stack_trace_save+0x94/0xd0 [ 40.456431][ T404] kasan_save_stack+0x24/0x50 [ 40.456567][ T404] __kasan_record_aux_stack+0x8e/0xa0 [ 40.456708][ T404] __call_rcu_common.constprop.0+0x9e/0x830 [ 40.456881][ T404] kmem_cache_free+0x1ac/0x220 [ 40.457021][ T404] p9_req_put+0x17f/0x210 [ 40.457188][ T404] p9_client_readlink+0xd3/0x120 [ 40.457382][ T404] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.457540][ T404] pick_link+0x8b4/0x1160 [ 40.457681][ T404] step_into+0x84e/0xfa0 [ 40.457783][ T404] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.457954][ T404] path_openat+0x1be/0x440 [ 40.458090][ T404] do_filp_open+0x1b3/0x3e0 [ 40.458244][ T404] do_sys_openat2+0x122/0x160 [ 40.458385][ T404] __x64_sys_openat+0x123/0x1e0 [ 40.458527][ T404] do_syscall_64+0xc6/0x1e0 [ 40.458666][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.458836][ T404] [ 40.458836][ T404] to a SOFTIRQ-irq-unsafe lock: [ 40.459019][ T404] (&p->alloc_lock){+.+.}-{2:2} [ 40.459024][ T404] [ 40.459024][ T404] ... which became SOFTIRQ-irq-unsafe at: [ 40.459367][ T404] ... [ 40.459368][ T404] __lock_acquire+0x797/0x1570 [ 40.459581][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.459719][ T404] _raw_spin_lock+0x30/0x40 [ 40.459872][ T404] set_mems_allowed+0x1d/0x210 [ 40.460012][ T404] kernel_init_freeable+0x72/0x310 [ 40.460158][ T404] kernel_init+0x20/0x200 [ 40.460296][ T404] ret_from_fork+0x31/0x70 [ 40.460438][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.460574][ T404] [ 40.460574][ T404] other info that might help us debug this: [ 40.460574][ T404] [ 40.460842][ T404] Possible interrupt unsafe locking scenario: [ 40.460842][ T404] [ 40.461046][ T404] CPU0 CPU1 [ 40.461187][ T404] ---- ---- [ 40.461323][ T404] lock(&p->alloc_lock); [ 40.461430][ T404] local_irq_disable(); [ 40.461599][ T404] lock(&ndev->lock); [ 40.461771][ T404] lock(&p->alloc_lock); [ 40.461940][ T404] [ 40.462042][ T404] lock(&ndev->lock); [ 40.462156][ T404] [ 40.462156][ T404] *** DEADLOCK *** [ 40.462156][ T404] [ 40.462353][ T404] 3 locks held by sysctl/404: [ 40.462488][ T404] #0: ffff888005f743f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 40.462740][ T404] #1: ffffffffb8d969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 40.463023][ T404] #2: ffff888005cb3d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 40.463286][ T404] [ 40.463286][ T404] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 40.463547][ T404] -> (&ndev->lock){++--}-{2:2} { [ 40.463691][ T404] HARDIRQ-ON-W at: [ 40.463797][ T404] __lock_acquire+0x797/0x1570 [ 40.463992][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.464165][ T404] _raw_write_lock_bh+0x38/0x50 [ 40.464338][ T404] addrconf_permanent_addr+0x6e/0x670 [ 40.464511][ T404] addrconf_notify+0x749/0xd60 [ 40.464686][ T404] notifier_call_chain+0xcd/0x150 [ 40.464859][ T404] __dev_notify_flags+0xe6/0x250 [ 40.465046][ T404] dev_change_flags+0xec/0x160 [ 40.465220][ T404] do_setlink+0x7d6/0x21e0 [ 40.465393][ T404] __rtnl_newlink+0xaa7/0xd80 [ 40.465567][ T404] rtnl_newlink+0x63/0xa0 [ 40.465741][ T404] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 40.465915][ T404] netlink_rcv_skb+0x130/0x360 [ 40.466090][ T404] netlink_unicast+0x449/0x710 [ 40.466271][ T404] netlink_sendmsg+0x723/0xbe0 [ 40.466443][ T404] ____sys_sendmsg+0x7b2/0xa10 [ 40.466619][ T404] ___sys_sendmsg+0xee/0x170 [ 40.466791][ T404] __sys_sendmsg+0xcd/0x170 [ 40.466967][ T404] do_syscall_64+0xc6/0x1e0 [ 40.467146][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.467358][ T404] HARDIRQ-ON-R at: [ 40.467465][ T404] __lock_acquire+0x797/0x1570 [ 40.467639][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.467812][ T404] _raw_read_lock_bh+0x44/0x80 [ 40.467985][ T404] inet6_fill_ifla6_attrs+0x516/0x740 [ 40.468161][ T404] inet6_fill_link_af+0x5e/0xe0 [ 40.468334][ T404] rtnl_fill_ifinfo+0x1612/0x29e0 [ 40.468510][ T404] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 40.468683][ T404] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 40.468888][ T404] rtmsg_ifinfo+0x5b/0xa0 [ 40.469061][ T404] register_netdevice+0x1177/0x1690 [ 40.469236][ T404] register_netdev+0x20/0x40 [ 40.469417][ T404] sit_init_net+0x250/0x4f0 [ 40.469601][ T404] ops_init+0x9b/0x560 [ 40.469743][ T404] register_pernet_operations+0x2db/0x710 [ 40.469968][ T404] register_pernet_device+0x2a/0x60 [ 40.470140][ T404] sit_init+0x23/0xe0 [ 40.470281][ T404] do_one_initcall+0x8d/0x1e0 [ 40.470456][ T404] do_initcalls+0x1b2/0x3e0 [ 40.470634][ T404] kernel_init_freeable+0x232/0x310 [ 40.470807][ T404] kernel_init+0x20/0x200 [ 40.470984][ T404] ret_from_fork+0x31/0x70 [ 40.471161][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.471332][ T404] IN-SOFTIRQ-W at: [ 40.471438][ T404] __lock_acquire+0x797/0x1570 [ 40.471613][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.471800][ T404] _raw_write_lock+0x30/0x40 [ 40.471972][ T404] addrconf_rs_timer+0xa9/0x730 [ 40.472141][ T404] call_timer_fn+0x13b/0x230 [ 40.472319][ T404] __run_timers+0x545/0x810 [ 40.472523][ T404] run_timer_softirq+0xe8/0x1b0 [ 40.472709][ T404] __do_softirq+0x1f8/0x5df [ 40.472899][ T404] irq_exit_rcu+0x97/0xc0 [ 40.473090][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.473319][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.473545][ T404] unwind_next_frame+0x1f4/0x1d00 [ 40.473737][ T404] arch_stack_walk+0x8c/0xf0 [ 40.473925][ T404] stack_trace_save+0x94/0xd0 [ 40.474114][ T404] kasan_save_stack+0x24/0x50 [ 40.474313][ T404] __kasan_record_aux_stack+0x8e/0xa0 [ 40.474504][ T404] __call_rcu_common.constprop.0+0x9e/0x830 [ 40.474731][ T404] kmem_cache_free+0x1ac/0x220 [ 40.474927][ T404] p9_req_put+0x17f/0x210 [ 40.475117][ T404] p9_client_readlink+0xd3/0x120 [ 40.475307][ T404] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.475507][ T404] pick_link+0x8b4/0x1160 [ 40.475696][ T404] step_into+0x84e/0xfa0 [ 40.475883][ T404] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.476111][ T404] path_openat+0x1be/0x440 [ 40.476391][ T404] do_filp_open+0x1b3/0x3e0 [ 40.476580][ T404] do_sys_openat2+0x122/0x160 [ 40.476775][ T404] __x64_sys_openat+0x123/0x1e0 [ 40.477051][ T404] do_syscall_64+0xc6/0x1e0 [ 40.477243][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.477468][ T404] IN-SOFTIRQ-R at: [ 40.477581][ T404] __lock_acquire+0x797/0x1570 [ 40.477858][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.478046][ T404] _raw_read_lock_bh+0x44/0x80 [ 40.478238][ T404] ipv6_get_lladdr+0xa9/0x3e0 [ 40.478590][ T404] addrconf_rs_timer+0x24a/0x730 [ 40.478778][ T404] call_timer_fn+0x13b/0x230 [ 40.478963][ T404] __run_timers+0x545/0x810 [ 40.479151][ T404] run_timer_softirq+0xe8/0x1b0 [ 40.479421][ T404] __do_softirq+0x1f8/0x5df [ 40.479614][ T404] irq_exit_rcu+0x97/0xc0 [ 40.479810][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.480125][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.480352][ T404] unwind_next_frame+0x1f4/0x1d00 [ 40.480549][ T404] arch_stack_walk+0x8c/0xf0 [ 40.480819][ T404] stack_trace_save+0x94/0xd0 [ 40.481007][ T404] kasan_save_stack+0x24/0x50 [ 40.481199][ T404] __kasan_record_aux_stack+0x8e/0xa0 [ 40.481480][ T404] __call_rcu_common.constprop.0+0x9e/0x830 [ 40.481705][ T404] kmem_cache_free+0x1ac/0x220 [ 40.481893][ T404] p9_req_put+0x17f/0x210 [ 40.482079][ T404] p9_client_readlink+0xd3/0x120 [ 40.482349][ T404] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.482542][ T404] pick_link+0x8b4/0x1160 [ 40.482724][ T404] step_into+0x84e/0xfa0 [ 40.482993][ T404] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.483214][ T404] path_openat+0x1be/0x440 [ 40.483399][ T404] do_filp_open+0x1b3/0x3e0 [ 40.483664][ T404] do_sys_openat2+0x122/0x160 [ 40.483860][ T404] __x64_sys_openat+0x123/0x1e0 [ 40.484045][ T404] do_syscall_64+0xc6/0x1e0 [ 40.484232][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.484539][ T404] INITIAL USE at: [ 40.484647][ T404] __lock_acquire+0x797/0x1570 [ 40.484830][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.485099][ T404] _raw_write_lock_bh+0x38/0x50 [ 40.485288][ T404] addrconf_permanent_addr+0x6e/0x670 [ 40.485469][ T404] addrconf_notify+0x749/0xd60 [ 40.485660][ T404] notifier_call_chain+0xcd/0x150 [ 40.485925][ T404] __dev_notify_flags+0xe6/0x250 [ 40.486109][ T404] dev_change_flags+0xec/0x160 [ 40.486294][ T404] do_setlink+0x7d6/0x21e0 [ 40.486568][ T404] __rtnl_newlink+0xaa7/0xd80 [ 40.486754][ T404] rtnl_newlink+0x63/0xa0 [ 40.486937][ T404] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 40.487204][ T404] netlink_rcv_skb+0x130/0x360 [ 40.487386][ T404] netlink_unicast+0x449/0x710 [ 40.487569][ T404] netlink_sendmsg+0x723/0xbe0 [ 40.487752][ T404] ____sys_sendmsg+0x7b2/0xa10 [ 40.488021][ T404] ___sys_sendmsg+0xee/0x170 [ 40.488203][ T404] __sys_sendmsg+0xcd/0x170 [ 40.488390][ T404] do_syscall_64+0xc6/0x1e0 [ 40.488652][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.488871][ T404] INITIAL READ USE at: [ 40.488981][ T404] __lock_acquire+0x797/0x1570 [ 40.489169][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.489434][ T404] _raw_read_lock_bh+0x44/0x80 [ 40.489620][ T404] inet6_fill_ifla6_attrs+0x516/0x740 [ 40.489855][ T404] inet6_fill_link_af+0x5e/0xe0 [ 40.490210][ T404] rtnl_fill_ifinfo+0x1612/0x29e0 [ 40.490396][ T404] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 40.490622][ T404] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 40.490926][ T404] rtmsg_ifinfo+0x5b/0xa0 [ 40.491114][ T404] register_netdevice+0x1177/0x1690 [ 40.491335][ T404] register_netdev+0x20/0x40 [ 40.491602][ T404] sit_init_net+0x250/0x4f0 [ 40.491788][ T404] ops_init+0x9b/0x560 [ 40.491981][ T404] register_pernet_operations+0x2db/0x710 [ 40.492283][ T404] register_pernet_device+0x2a/0x60 [ 40.492505][ T404] sit_init+0x23/0xe0 [ 40.492692][ T404] do_one_initcall+0x8d/0x1e0 [ 40.492875][ T404] do_initcalls+0x1b2/0x3e0 [ 40.493146][ T404] kernel_init_freeable+0x232/0x310 [ 40.493370][ T404] kernel_init+0x20/0x200 [ 40.493576][ T404] ret_from_fork+0x31/0x70 [ 40.493846][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.494034][ T404] } [ 40.494112][ T404] ... key at: [] __key.37+0x0/0x40 [ 40.494331][ T404] [ 40.494331][ T404] the dependencies between the lock to be acquired [ 40.494333][ T404] and SOFTIRQ-irq-unsafe lock: [ 40.494738][ T404] -> (&p->alloc_lock){+.+.}-{2:2} { [ 40.494892][ T404] HARDIRQ-ON-W at: [ 40.495087][ T404] __lock_acquire+0x797/0x1570 [ 40.495276][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.495462][ T404] _raw_spin_lock+0x30/0x40 [ 40.495646][ T404] set_mems_allowed+0x1d/0x210 [ 40.495918][ T404] kernel_init_freeable+0x72/0x310 [ 40.496103][ T404] kernel_init+0x20/0x200 [ 40.496290][ T404] ret_from_fork+0x31/0x70 [ 40.496571][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.496758][ T404] SOFTIRQ-ON-W at: [ 40.496870][ T404] __lock_acquire+0x797/0x1570 [ 40.497058][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.497248][ T404] _raw_spin_lock+0x30/0x40 [ 40.497434][ T404] set_mems_allowed+0x1d/0x210 [ 40.497618][ T404] kernel_init_freeable+0x72/0x310 [ 40.497886][ T404] kernel_init+0x20/0x200 [ 40.498072][ T404] ret_from_fork+0x31/0x70 [ 40.498258][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.498459][ T404] INITIAL USE at: [ 40.498657][ T404] __lock_acquire+0x797/0x1570 [ 40.498841][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.499030][ T404] _raw_spin_lock+0x30/0x40 [ 40.499215][ T404] set_mems_allowed+0x1d/0x210 [ 40.499482][ T404] kernel_init_freeable+0x72/0x310 [ 40.499668][ T404] kernel_init+0x20/0x200 [ 40.499868][ T404] ret_from_fork+0x31/0x70 [ 40.500144][ T404] ret_from_fork_asm+0x1a/0x30 [ 40.500328][ T404] } [ 40.500404][ T404] ... key at: [] __key.387+0x0/0x40 [ 40.500632][ T404] ... acquired at: [ 40.500825][ T404] check_prev_add+0x194/0xce0 [ 40.500976][ T404] validate_chain+0x71d/0x9b0 [ 40.501128][ T404] __lock_acquire+0xaf0/0x1570 [ 40.501277][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.501521][ T404] _raw_spin_lock+0x30/0x40 [ 40.501669][ T404] __get_task_comm+0x27/0x70 [ 40.501825][ T404] ref_tracker_alloc+0x2ee/0x490 [ 40.501976][ T404] netdev_get_by_index+0x5e/0x80 [ 40.502127][ T404] fib6_nh_init+0x3d8/0x15b0 [ 40.502281][ T404] ip6_route_info_create+0xf18/0x17d0 [ 40.502433][ T404] addrconf_f6i_alloc+0x265/0x560 [ 40.502581][ T404] __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.502736][ T404] addrconf_join_anycast+0x1c0/0x220 [ 40.502963][ T404] dev_forward_change+0x2a6/0x7b0 [ 40.503113][ T404] addrconf_fixup_forwarding+0x23f/0x460 [ 40.503300][ T404] addrconf_sysctl_forward+0x212/0x2b0 [ 40.503448][ T404] proc_sys_call_handler+0x403/0x5e0 [ 40.503679][ T404] vfs_write+0x9e5/0x10a0 [ 40.503829][ T404] ksys_write+0xf5/0x1e0 [ 40.503980][ T404] do_syscall_64+0xc6/0x1e0 [ 40.504125][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.504393][ T404] [ 40.504467][ T404] [ 40.504467][ T404] stack backtrace: [ 40.504649][ T404] CPU: 0 PID: 404 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 40.504870][ T404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 40.505294][ T404] Call Trace: [ 40.505406][ T404] [ 40.505483][ T404] dump_stack_lvl+0x82/0xd0 [ 40.505638][ T404] print_bad_irq_dependency+0x957/0xd40 [ 40.505870][ T404] ? hlock_class+0x4e/0x130 [ 40.506025][ T404] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 40.506218][ T404] ? __pfx_usage_skip+0x10/0x10 [ 40.506369][ T404] ? __bfs+0x246/0x650 [ 40.506567][ T404] ? __pfx_usage_match+0x10/0x10 [ 40.506715][ T404] check_irq_usage+0x596/0x850 [ 40.506867][ T404] ? __pfx_check_irq_usage+0x10/0x10 [ 40.507020][ T404] ? __bfs+0x246/0x650 [ 40.507136][ T404] ? __pfx_hlock_conflict+0x10/0x10 [ 40.507283][ T404] ? check_path.constprop.0+0x24/0x50 [ 40.507434][ T404] ? check_noncircular+0x14c/0x3e0 [ 40.507582][ T404] ? __pfx_check_noncircular+0x10/0x10 [ 40.507734][ T404] ? check_prev_add+0x194/0xce0 [ 40.507967][ T404] check_prev_add+0x194/0xce0 [ 40.508123][ T404] ? validate_chain+0x130/0x9b0 [ 40.508270][ T404] validate_chain+0x71d/0x9b0 [ 40.508421][ T404] ? mark_lock+0x38/0x3e0 [ 40.508614][ T404] ? __pfx_validate_chain+0x10/0x10 [ 40.508761][ T404] ? hlock_class+0x4e/0x130 [ 40.508906][ T404] ? mark_lock+0x38/0x3e0 [ 40.509021][ T404] __lock_acquire+0xaf0/0x1570 [ 40.509172][ T404] lock_acquire.part.0+0xeb/0x330 [ 40.509405][ T404] ? __get_task_comm+0x27/0x70 [ 40.509556][ T404] ? mark_lock+0x38/0x3e0 [ 40.509667][ T404] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 40.509827][ T404] ? trace_lock_acquire+0x135/0x1c0 [ 40.510057][ T404] ? __get_task_comm+0x27/0x70 [ 40.510203][ T404] ? lock_acquire+0x32/0xc0 [ 40.510349][ T404] ? __get_task_comm+0x27/0x70 [ 40.510497][ T404] _raw_spin_lock+0x30/0x40 [ 40.510734][ T404] ? __get_task_comm+0x27/0x70 [ 40.510893][ T404] __get_task_comm+0x27/0x70 [ 40.511039][ T404] ref_tracker_alloc+0x2ee/0x490 [ 40.511195][ T404] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 40.511341][ T404] ? dev_get_by_index+0x177/0x270 [ 40.511572][ T404] ? netdev_get_by_index+0x5e/0x80 [ 40.511718][ T404] ? fib6_nh_init+0x3d8/0x15b0 [ 40.511864][ T404] ? ip6_route_info_create+0xf18/0x17d0 [ 40.512010][ T404] ? addrconf_f6i_alloc+0x265/0x560 [ 40.512162][ T404] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.512307][ T404] ? addrconf_join_anycast+0x1c0/0x220 [ 40.512452][ T404] ? dev_forward_change+0x2a6/0x7b0 [ 40.512599][ T404] ? addrconf_fixup_forwarding+0x23f/0x460 [ 40.512939][ T404] ? addrconf_sysctl_forward+0x212/0x2b0 [ 40.513085][ T404] ? proc_sys_call_handler+0x403/0x5e0 [ 40.513231][ T404] ? vfs_write+0x9e5/0x10a0 [ 40.513385][ T404] ? ksys_write+0xf5/0x1e0 [ 40.513612][ T404] ? do_syscall_64+0xc6/0x1e0 [ 40.513759][ T404] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.513940][ T404] ? dev_get_by_index+0x177/0x270 [ 40.514087][ T404] netdev_get_by_index+0x5e/0x80 [ 40.514314][ T404] fib6_nh_init+0x3d8/0x15b0 [ 40.514460][ T404] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 40.514643][ T404] ? __pfx_fib6_nh_init+0x10/0x10 [ 40.514797][ T404] ? kasan_save_track+0x14/0x30 [ 40.515032][ T404] ? __kasan_kmalloc+0x7f/0x90 [ 40.515180][ T404] ? __kmalloc+0x1d7/0x3c0 [ 40.515325][ T404] ? fib6_get_table+0x116/0x290 [ 40.515471][ T404] ip6_route_info_create+0xf18/0x17d0 [ 40.515697][ T404] ? __lock_release+0x103/0x460 [ 40.515848][ T404] ? __pfx_ip6_route_info_create+0x10/0x10 [ 40.516028][ T404] ? addrconf_f6i_alloc+0x12d/0x560 [ 40.516185][ T404] addrconf_f6i_alloc+0x265/0x560 [ 40.516417][ T404] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 40.516567][ T404] ? do_raw_write_lock+0x122/0x3b0 [ 40.516714][ T404] ? __pfx_do_raw_write_lock+0x10/0x10 [ 40.516863][ T404] ? lock_acquire+0x32/0xc0 [ 40.517011][ T404] __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.517245][ T404] addrconf_join_anycast+0x1c0/0x220 [ 40.517393][ T404] ? mark_lock+0x38/0x3e0 [ 40.517504][ T404] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 40.517691][ T404] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 40.517962][ T404] dev_forward_change+0x2a6/0x7b0 [ 40.518110][ T404] ? __pfx_dev_forward_change+0x10/0x10 [ 40.518258][ T404] addrconf_fixup_forwarding+0x23f/0x460 [ 40.518404][ T404] addrconf_sysctl_forward+0x212/0x2b0 [ 40.518642][ T404] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 40.518823][ T404] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 40.519011][ T404] ? trace_kmalloc+0x2a/0xe0 [ 40.519157][ T404] ? __kmalloc_node+0x220/0x400 [ 40.519389][ T404] ? proc_sys_call_handler+0x30b/0x5e0 [ 40.519536][ T404] proc_sys_call_handler+0x403/0x5e0 [ 40.519682][ T404] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 40.519882][ T404] ? __lock_acquire+0xaf0/0x1570 [ 40.520117][ T404] vfs_write+0x9e5/0x10a0 [ 40.520228][ T404] ? do_user_addr_fault+0x449/0xbe0 [ 40.520378][ T404] ? __pfx_vfs_write+0x10/0x10 [ 40.520523][ T404] ? find_held_lock+0x2c/0x110 [ 40.520750][ T404] ? __pfx___lock_release+0x10/0x10 [ 40.520903][ T404] ? __fget_light+0x53/0x1e0 [ 40.521056][ T404] ksys_write+0xf5/0x1e0 [ 40.521169][ T404] ? __pfx_ksys_write+0x10/0x10 [ 40.521316][ T404] ? do_user_addr_fault+0x4bd/0xbe0 [ 40.521543][ T404] do_syscall_64+0xc6/0x1e0 [ 40.521693][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.521873][ T404] RIP: 0033:0x7f61e47b3957 [ 40.522032][ T404] 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 [ 40.522548][ T404] RSP: 002b:00007ffe5039fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 40.522849][ T404] RAX: ffffffffffffffda RBX: 0000563862618360 RCX: 00007f61e47b3957 [ 40.523075][ T404] RDX: 0000000000000002 RSI: 00005638626183a0 RDI: 0000000000000005 [ 40.523294][ T404] RBP: 000056386261a4d0 R08: 0000000000000003 R09: 0000000000000077 [ 40.523600][ T404] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 40.523817][ T404] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f61e486a9c0 [ 40.524050][ T404]