[ 29.691611][ T267] ip (267) used greatest stack depth: 23616 bytes left [ 34.901414][ T312] gre: GRE over IPv4 demultiplexor driver [ 34.950474][ T312] ip6_gre: GRE over IPv6 tunneling driver [ 37.193029][ T334] 8021q: 802.1Q VLAN Support v1.8 [ 41.833611][ T372] GACT probability NOT on [ 45.571370][ T405] [ 45.571506][ T405] ===================================================== [ 45.571754][ T405] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 45.572091][ T405] 6.9.0-rc1-virtme #1 Not tainted [ 45.572312][ T405] ----------------------------------------------------- [ 45.572586][ T405] sysctl/405 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 45.572921][ T405] ffff8880089e8968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 45.573352][ T405] [ 45.573352][ T405] and this task is already holding: [ 45.573678][ T405] ffff888005d60d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 45.574091][ T405] which would create a new lock dependency: [ 45.574377][ T405] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 45.574712][ T405] [ 45.574712][ T405] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 45.575105][ T405] (&ndev->lock){++--}-{2:2} [ 45.575112][ T405] [ 45.575112][ T405] ... which became SOFTIRQ-irq-safe at: [ 45.575645][ T405] __lock_acquire+0x797/0x1570 [ 45.575872][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.576096][ T405] _raw_write_lock+0x30/0x40 [ 45.576330][ T405] addrconf_rs_timer+0xa9/0x730 [ 45.576552][ T405] call_timer_fn+0x13b/0x230 [ 45.576777][ T405] __run_timers+0x545/0x810 [ 45.576998][ T405] timer_expire_remote+0x9b/0xe0 [ 45.577219][ T405] tmigr_handle_remote_cpu+0x270/0x430 [ 45.577442][ T405] tmigr_handle_remote_up+0x19f/0x2e0 [ 45.577667][ T405] tmigr_handle_remote+0x21d/0x3a0 [ 45.577891][ T405] __do_softirq+0x1f8/0x5df [ 45.578119][ T405] irq_exit_rcu+0x97/0xc0 [ 45.578342][ T405] sysvec_apic_timer_interrupt+0x75/0x80 [ 45.578561][ T405] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 45.578840][ T405] _raw_spin_unlock_irqrestore+0x43/0x70 [ 45.579062][ T405] get_partial_node.part.0+0x1c5/0x3a0 [ 45.579284][ T405] ___slab_alloc+0xb70/0x10a0 [ 45.579506][ T405] __kmalloc+0x34c/0x3c0 [ 45.579673][ T405] p9_fcall_init+0x7d/0x1b0 [ 45.579908][ T405] p9_tag_alloc+0x138/0x700 [ 45.580132][ T405] p9_client_prepare_req+0xe6/0x290 [ 45.580357][ T405] p9_client_rpc+0x18d/0x930 [ 45.580578][ T405] p9_client_getattr_dotl+0xb5/0x1a0 [ 45.580802][ T405] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 45.581026][ T405] ovl_getattr+0x46f/0xdd0 [ 45.581251][ T405] vfs_fstat+0x3b/0x80 [ 45.581423][ T405] __do_sys_newfstatat+0x6b/0xc0 [ 45.581651][ T405] do_syscall_64+0xc6/0x1e0 [ 45.581871][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.582144][ T405] [ 45.582144][ T405] to a SOFTIRQ-irq-unsafe lock: [ 45.582422][ T405] (&p->alloc_lock){+.+.}-{2:2} [ 45.582430][ T405] [ 45.582430][ T405] ... which became SOFTIRQ-irq-unsafe at: [ 45.582972][ T405] ... [ 45.582974][ T405] __lock_acquire+0x797/0x1570 [ 45.583308][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.583536][ T405] _raw_spin_lock+0x30/0x40 [ 45.583761][ T405] set_mems_allowed+0x1d/0x210 [ 45.583985][ T405] kernel_init_freeable+0x72/0x310 [ 45.584211][ T405] kernel_init+0x20/0x200 [ 45.584433][ T405] ret_from_fork+0x31/0x70 [ 45.584659][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.584886][ T405] [ 45.584886][ T405] other info that might help us debug this: [ 45.584886][ T405] [ 45.585326][ T405] Possible interrupt unsafe locking scenario: [ 45.585326][ T405] [ 45.585661][ T405] CPU0 CPU1 [ 45.585886][ T405] ---- ---- [ 45.586110][ T405] lock(&p->alloc_lock); [ 45.586284][ T405] local_irq_disable(); [ 45.586592][ T405] lock(&ndev->lock); [ 45.586871][ T405] lock(&p->alloc_lock); [ 45.587153][ T405] [ 45.587322][ T405] lock(&ndev->lock); [ 45.587494][ T405] [ 45.587494][ T405] *** DEADLOCK *** [ 45.587494][ T405] [ 45.587819][ T405] 3 locks held by sysctl/405: [ 45.588040][ T405] #0: ffff888005fac3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 45.588448][ T405] #1: ffffffff8db969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 45.588911][ T405] #2: ffff888005d60d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 45.589309][ T405] [ 45.589309][ T405] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 45.589735][ T405] -> (&ndev->lock){++--}-{2:2} { [ 45.589969][ T405] HARDIRQ-ON-W at: [ 45.590140][ T405] __lock_acquire+0x797/0x1570 [ 45.590427][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.590716][ T405] _raw_write_lock_bh+0x38/0x50 [ 45.591000][ T405] addrconf_permanent_addr+0x6e/0x670 [ 45.591282][ T405] addrconf_notify+0x749/0xd60 [ 45.591564][ T405] notifier_call_chain+0xcd/0x150 [ 45.591845][ T405] __dev_notify_flags+0xe6/0x250 [ 45.592134][ T405] dev_change_flags+0xec/0x160 [ 45.592416][ T405] do_setlink+0x7d6/0x21e0 [ 45.592697][ T405] __rtnl_newlink+0xaa7/0xd80 [ 45.592977][ T405] rtnl_newlink+0x63/0xa0 [ 45.593261][ T405] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 45.593538][ T405] netlink_rcv_skb+0x130/0x360 [ 45.593816][ T405] netlink_unicast+0x449/0x710 [ 45.594105][ T405] netlink_sendmsg+0x723/0xbe0 [ 45.594385][ T405] ____sys_sendmsg+0x7b2/0xa10 [ 45.594667][ T405] ___sys_sendmsg+0xee/0x170 [ 45.594961][ T405] __sys_sendmsg+0xcd/0x170 [ 45.595246][ T405] do_syscall_64+0xc6/0x1e0 [ 45.595530][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.595871][ T405] HARDIRQ-ON-R at: [ 45.596051][ T405] __lock_acquire+0x797/0x1570 [ 45.596341][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.596620][ T405] _raw_read_lock_bh+0x44/0x80 [ 45.596906][ T405] inet6_fill_ifla6_attrs+0x516/0x740 [ 45.597190][ T405] inet6_fill_link_af+0x5e/0xe0 [ 45.597499][ T405] rtnl_fill_ifinfo+0x1612/0x29e0 [ 45.597785][ T405] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 45.598066][ T405] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 45.598398][ T405] rtmsg_ifinfo+0x5b/0xa0 [ 45.598678][ T405] register_netdevice+0x1177/0x1690 [ 45.598967][ T405] register_netdev+0x20/0x40 [ 45.599252][ T405] sit_init_net+0x250/0x4f0 [ 45.599543][ T405] ops_init+0x9b/0x560 [ 45.599777][ T405] register_pernet_operations+0x2db/0x710 [ 45.600119][ T405] register_pernet_device+0x2a/0x60 [ 45.600399][ T405] sit_init+0x23/0xe0 [ 45.600645][ T405] do_one_initcall+0x8d/0x1e0 [ 45.600955][ T405] do_initcalls+0x1b2/0x3e0 [ 45.601237][ T405] kernel_init_freeable+0x232/0x310 [ 45.601522][ T405] kernel_init+0x20/0x200 [ 45.601804][ T405] ret_from_fork+0x31/0x70 [ 45.602089][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.602368][ T405] IN-SOFTIRQ-W at: [ 45.602537][ T405] __lock_acquire+0x797/0x1570 [ 45.602820][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.603106][ T405] _raw_write_lock+0x30/0x40 [ 45.603394][ T405] addrconf_rs_timer+0xa9/0x730 [ 45.603675][ T405] call_timer_fn+0x13b/0x230 [ 45.603959][ T405] __run_timers+0x545/0x810 [ 45.604238][ T405] timer_expire_remote+0x9b/0xe0 [ 45.604517][ T405] tmigr_handle_remote_cpu+0x270/0x430 [ 45.604814][ T405] tmigr_handle_remote_up+0x19f/0x2e0 [ 45.605102][ T405] tmigr_handle_remote+0x21d/0x3a0 [ 45.605380][ T405] __do_softirq+0x1f8/0x5df [ 45.605662][ T405] irq_exit_rcu+0x97/0xc0 [ 45.605946][ T405] sysvec_apic_timer_interrupt+0x75/0x80 [ 45.606286][ T405] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 45.606623][ T405] _raw_spin_unlock_irqrestore+0x43/0x70 [ 45.606992][ T405] get_partial_node.part.0+0x1c5/0x3a0 [ 45.607276][ T405] ___slab_alloc+0xb70/0x10a0 [ 45.607559][ T405] __kmalloc+0x34c/0x3c0 [ 45.607846][ T405] p9_fcall_init+0x7d/0x1b0 [ 45.608126][ T405] p9_tag_alloc+0x138/0x700 [ 45.608405][ T405] p9_client_prepare_req+0xe6/0x290 [ 45.608698][ T405] p9_client_rpc+0x18d/0x930 [ 45.608970][ T405] p9_client_getattr_dotl+0xb5/0x1a0 [ 45.609257][ T405] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 45.609543][ T405] ovl_getattr+0x46f/0xdd0 [ 45.609828][ T405] vfs_fstat+0x3b/0x80 [ 45.610058][ T405] __do_sys_newfstatat+0x6b/0xc0 [ 45.610348][ T405] do_syscall_64+0xc6/0x1e0 [ 45.610637][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.610973][ T405] IN-SOFTIRQ-R at: [ 45.611144][ T405] __lock_acquire+0x797/0x1570 [ 45.611429][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.611708][ T405] _raw_read_lock_bh+0x44/0x80 [ 45.611989][ T405] ipv6_get_lladdr+0xa9/0x3e0 [ 45.612273][ T405] addrconf_rs_timer+0x24a/0x730 [ 45.612553][ T405] call_timer_fn+0x13b/0x230 [ 45.612979][ T405] __run_timers+0x545/0x810 [ 45.613260][ T405] timer_expire_remote+0x9b/0xe0 [ 45.613543][ T405] tmigr_handle_remote_cpu+0x270/0x430 [ 45.613973][ T405] tmigr_handle_remote_up+0x19f/0x2e0 [ 45.614257][ T405] tmigr_handle_remote+0x21d/0x3a0 [ 45.614530][ T405] __do_softirq+0x1f8/0x5df [ 45.614931][ T405] irq_exit_rcu+0x97/0xc0 [ 45.615114][ T405] sysvec_apic_timer_interrupt+0x75/0x80 [ 45.615327][ T405] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 45.615617][ T405] _raw_spin_unlock_irqrestore+0x43/0x70 [ 45.615833][ T405] get_partial_node.part.0+0x1c5/0x3a0 [ 45.616007][ T405] ___slab_alloc+0xb70/0x10a0 [ 45.616180][ T405] __kmalloc+0x34c/0x3c0 [ 45.616518][ T405] p9_fcall_init+0x7d/0x1b0 [ 45.616692][ T405] p9_tag_alloc+0x138/0x700 [ 45.616865][ T405] p9_client_prepare_req+0xe6/0x290 [ 45.617127][ T405] p9_client_rpc+0x18d/0x930 [ 45.617309][ T405] p9_client_getattr_dotl+0xb5/0x1a0 [ 45.617483][ T405] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 45.617659][ T405] ovl_getattr+0x46f/0xdd0 [ 45.617834][ T405] vfs_fstat+0x3b/0x80 [ 45.617972][ T405] __do_sys_newfstatat+0x6b/0xc0 [ 45.618144][ T405] do_syscall_64+0xc6/0x1e0 [ 45.618405][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.618616][ T405] INITIAL USE at: [ 45.618722][ T405] __lock_acquire+0x797/0x1570 [ 45.618901][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.619169][ T405] _raw_write_lock_bh+0x38/0x50 [ 45.619348][ T405] addrconf_permanent_addr+0x6e/0x670 [ 45.619527][ T405] addrconf_notify+0x749/0xd60 [ 45.619702][ T405] notifier_call_chain+0xcd/0x150 [ 45.619880][ T405] __dev_notify_flags+0xe6/0x250 [ 45.620055][ T405] dev_change_flags+0xec/0x160 [ 45.620317][ T405] do_setlink+0x7d6/0x21e0 [ 45.620492][ T405] __rtnl_newlink+0xaa7/0xd80 [ 45.620666][ T405] rtnl_newlink+0x63/0xa0 [ 45.620846][ T405] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 45.621110][ T405] netlink_rcv_skb+0x130/0x360 [ 45.621286][ T405] netlink_unicast+0x449/0x710 [ 45.621468][ T405] netlink_sendmsg+0x723/0xbe0 [ 45.621643][ T405] ____sys_sendmsg+0x7b2/0xa10 [ 45.621818][ T405] ___sys_sendmsg+0xee/0x170 [ 45.621995][ T405] __sys_sendmsg+0xcd/0x170 [ 45.622176][ T405] do_syscall_64+0xc6/0x1e0 [ 45.622439][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.622648][ T405] INITIAL READ USE at: [ 45.622754][ T405] __lock_acquire+0x797/0x1570 [ 45.623010][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.623182][ T405] _raw_read_lock_bh+0x44/0x80 [ 45.623382][ T405] inet6_fill_ifla6_attrs+0x516/0x740 [ 45.623592][ T405] inet6_fill_link_af+0x5e/0xe0 [ 45.623772][ T405] rtnl_fill_ifinfo+0x1612/0x29e0 [ 45.623952][ T405] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 45.624179][ T405] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 45.624469][ T405] rtmsg_ifinfo+0x5b/0xa0 [ 45.624650][ T405] register_netdevice+0x1177/0x1690 [ 45.624881][ T405] register_netdev+0x20/0x40 [ 45.625145][ T405] sit_init_net+0x250/0x4f0 [ 45.625325][ T405] ops_init+0x9b/0x560 [ 45.625502][ T405] register_pernet_operations+0x2db/0x710 [ 45.625713][ T405] register_pernet_device+0x2a/0x60 [ 45.625932][ T405] sit_init+0x23/0xe0 [ 45.626109][ T405] do_one_initcall+0x8d/0x1e0 [ 45.626372][ T405] do_initcalls+0x1b2/0x3e0 [ 45.626552][ T405] kernel_init_freeable+0x232/0x310 [ 45.626760][ T405] kernel_init+0x20/0x200 [ 45.627108][ T405] ret_from_fork+0x31/0x70 [ 45.627293][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.627469][ T405] } [ 45.627549][ T405] ... key at: [] __key.37+0x0/0x40 [ 45.627767][ T405] [ 45.627767][ T405] the dependencies between the lock to be acquired [ 45.627769][ T405] and SOFTIRQ-irq-unsafe lock: [ 45.628147][ T405] -> (&p->alloc_lock){+.+.}-{2:2} { [ 45.628386][ T405] HARDIRQ-ON-W at: [ 45.628495][ T405] __lock_acquire+0x797/0x1570 [ 45.628675][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.628849][ T405] _raw_spin_lock+0x30/0x40 [ 45.629110][ T405] set_mems_allowed+0x1d/0x210 [ 45.629285][ T405] kernel_init_freeable+0x72/0x310 [ 45.629462][ T405] kernel_init+0x20/0x200 [ 45.629644][ T405] ret_from_fork+0x31/0x70 [ 45.629904][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.630079][ T405] SOFTIRQ-ON-W at: [ 45.630186][ T405] __lock_acquire+0x797/0x1570 [ 45.630449][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.630626][ T405] _raw_spin_lock+0x30/0x40 [ 45.630802][ T405] set_mems_allowed+0x1d/0x210 [ 45.630987][ T405] kernel_init_freeable+0x72/0x310 [ 45.631245][ T405] kernel_init+0x20/0x200 [ 45.631420][ T405] ret_from_fork+0x31/0x70 [ 45.631596][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.631871][ T405] INITIAL USE at: [ 45.631996][ T405] __lock_acquire+0x797/0x1570 [ 45.632199][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.632396][ T405] _raw_spin_lock+0x30/0x40 [ 45.632668][ T405] set_mems_allowed+0x1d/0x210 [ 45.632856][ T405] kernel_init_freeable+0x72/0x310 [ 45.633044][ T405] kernel_init+0x20/0x200 [ 45.633316][ T405] ret_from_fork+0x31/0x70 [ 45.633507][ T405] ret_from_fork_asm+0x1a/0x30 [ 45.633699][ T405] } [ 45.633784][ T405] ... key at: [] __key.387+0x0/0x40 [ 45.634106][ T405] ... acquired at: [ 45.634220][ T405] check_prev_add+0x194/0xce0 [ 45.634377][ T405] validate_chain+0x71d/0x9b0 [ 45.634530][ T405] __lock_acquire+0xaf0/0x1570 [ 45.634682][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.634847][ T405] _raw_spin_lock+0x30/0x40 [ 45.635004][ T405] __get_task_comm+0x27/0x70 [ 45.635163][ T405] ref_tracker_alloc+0x2ee/0x490 [ 45.635324][ T405] netdev_get_by_index+0x5e/0x80 [ 45.635558][ T405] fib6_nh_init+0x3d8/0x15b0 [ 45.635709][ T405] ip6_route_info_create+0xf18/0x17d0 [ 45.635861][ T405] addrconf_f6i_alloc+0x265/0x560 [ 45.636025][ T405] __ipv6_dev_ac_inc+0x25f/0xb10 [ 45.636259][ T405] addrconf_join_anycast+0x1c0/0x220 [ 45.636410][ T405] dev_forward_change+0x2a6/0x7b0 [ 45.636567][ T405] addrconf_fixup_forwarding+0x23f/0x460 [ 45.636754][ T405] addrconf_sysctl_forward+0x212/0x2b0 [ 45.636987][ T405] proc_sys_call_handler+0x403/0x5e0 [ 45.637141][ T405] vfs_write+0x9e5/0x10a0 [ 45.637294][ T405] ksys_write+0xf5/0x1e0 [ 45.637446][ T405] do_syscall_64+0xc6/0x1e0 [ 45.637678][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.637875][ T405] [ 45.637953][ T405] [ 45.637953][ T405] stack backtrace: [ 45.638142][ T405] CPU: 1 PID: 405 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 45.638542][ T405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 45.638879][ T405] Call Trace: [ 45.638997][ T405] [ 45.639075][ T405] dump_stack_lvl+0x82/0xd0 [ 45.639316][ T405] print_bad_irq_dependency+0x957/0xd40 [ 45.639473][ T405] ? hlock_class+0x4e/0x130 [ 45.639633][ T405] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 45.639824][ T405] ? __pfx_usage_skip+0x10/0x10 [ 45.640075][ T405] ? __bfs+0x246/0x650 [ 45.640190][ T405] ? __pfx_usage_match+0x10/0x10 [ 45.640340][ T405] check_irq_usage+0x596/0x850 [ 45.640491][ T405] ? __pfx_check_irq_usage+0x10/0x10 [ 45.640644][ T405] ? __bfs+0x246/0x650 [ 45.640762][ T405] ? __pfx_hlock_conflict+0x10/0x10 [ 45.640911][ T405] ? check_path.constprop.0+0x24/0x50 [ 45.641060][ T405] ? check_noncircular+0x14c/0x3e0 [ 45.641211][ T405] ? __pfx_check_noncircular+0x10/0x10 [ 45.641449][ T405] ? check_prev_add+0x194/0xce0 [ 45.641599][ T405] check_prev_add+0x194/0xce0 [ 45.641749][ T405] ? validate_chain+0x130/0x9b0 [ 45.641897][ T405] validate_chain+0x71d/0x9b0 [ 45.642131][ T405] ? mark_lock+0x38/0x3e0 [ 45.642243][ T405] ? __pfx_validate_chain+0x10/0x10 [ 45.642393][ T405] ? hlock_class+0x4e/0x130 [ 45.642539][ T405] ? mark_lock+0x38/0x3e0 [ 45.642655][ T405] __lock_acquire+0xaf0/0x1570 [ 45.642888][ T405] lock_acquire.part.0+0xeb/0x330 [ 45.643035][ T405] ? __get_task_comm+0x27/0x70 [ 45.643185][ T405] ? mark_lock+0x38/0x3e0 [ 45.643300][ T405] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.643535][ T405] ? trace_lock_acquire+0x135/0x1c0 [ 45.643685][ T405] ? __get_task_comm+0x27/0x70 [ 45.643834][ T405] ? lock_acquire+0x32/0xc0 [ 45.643993][ T405] ? __get_task_comm+0x27/0x70 [ 45.644143][ T405] _raw_spin_lock+0x30/0x40 [ 45.644373][ T405] ? __get_task_comm+0x27/0x70 [ 45.644534][ T405] __get_task_comm+0x27/0x70 [ 45.644679][ T405] ref_tracker_alloc+0x2ee/0x490 [ 45.644832][ T405] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 45.645058][ T405] ? dev_get_by_index+0x177/0x270 [ 45.645194][ T405] ? netdev_get_by_index+0x5e/0x80 [ 45.645329][ T405] ? fib6_nh_init+0x3d8/0x15b0 [ 45.645468][ T405] ? ip6_route_info_create+0xf18/0x17d0 [ 45.645605][ T405] ? addrconf_f6i_alloc+0x265/0x560 [ 45.645742][ T405] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 45.645879][ T405] ? addrconf_join_anycast+0x1c0/0x220 [ 45.646019][ T405] ? dev_forward_change+0x2a6/0x7b0 [ 45.646237][ T405] ? addrconf_fixup_forwarding+0x23f/0x460 [ 45.646409][ T405] ? addrconf_sysctl_forward+0x212/0x2b0 [ 45.646545][ T405] ? proc_sys_call_handler+0x403/0x5e0 [ 45.646681][ T405] ? vfs_write+0x9e5/0x10a0 [ 45.646897][ T405] ? ksys_write+0xf5/0x1e0 [ 45.647031][ T405] ? do_syscall_64+0xc6/0x1e0 [ 45.647166][ T405] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.647342][ T405] ? dev_get_by_index+0x177/0x270 [ 45.647560][ T405] netdev_get_by_index+0x5e/0x80 [ 45.647701][ T405] fib6_nh_init+0x3d8/0x15b0 [ 45.647836][ T405] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 45.648018][ T405] ? __pfx_fib6_nh_init+0x10/0x10 [ 45.648235][ T405] ? kasan_save_track+0x14/0x30 [ 45.648398][ T405] ? __kasan_kmalloc+0x7f/0x90 [ 45.648536][ T405] ? __kmalloc+0x1d7/0x3c0 [ 45.648680][ T405] ? fib6_get_table+0x116/0x290 [ 45.648818][ T405] ip6_route_info_create+0xf18/0x17d0 [ 45.649041][ T405] ? __lock_release+0x103/0x460 [ 45.649180][ T405] ? __pfx_ip6_route_info_create+0x10/0x10 [ 45.649352][ T405] ? addrconf_f6i_alloc+0x12d/0x560 [ 45.649490][ T405] addrconf_f6i_alloc+0x265/0x560 [ 45.649788][ T405] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 45.649927][ T405] ? do_raw_write_lock+0x122/0x3b0 [ 45.650070][ T405] ? __pfx_do_raw_write_lock+0x10/0x10 [ 45.650208][ T405] ? lock_acquire+0x32/0xc0 [ 45.650431][ T405] __ipv6_dev_ac_inc+0x25f/0xb10 [ 45.650572][ T405] addrconf_join_anycast+0x1c0/0x220 [ 45.650708][ T405] ? mark_lock+0x38/0x3e0 [ 45.650811][ T405] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 45.651068][ T405] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 45.651237][ T405] dev_forward_change+0x2a6/0x7b0 [ 45.651383][ T405] ? __pfx_dev_forward_change+0x10/0x10 [ 45.651524][ T405] addrconf_fixup_forwarding+0x23f/0x460 [ 45.651661][ T405] addrconf_sysctl_forward+0x212/0x2b0 [ 45.651798][ T405] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 45.651975][ T405] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 45.652152][ T405] ? trace_kmalloc+0x2a/0xe0 [ 45.652374][ T405] ? __kmalloc_node+0x220/0x400 [ 45.652517][ T405] ? proc_sys_call_handler+0x30b/0x5e0 [ 45.652656][ T405] proc_sys_call_handler+0x403/0x5e0 [ 45.652794][ T405] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 45.653047][ T405] ? __lock_acquire+0xaf0/0x1570 [ 45.653187][ T405] vfs_write+0x9e5/0x10a0 [ 45.653290][ T405] ? do_user_addr_fault+0x449/0xbe0 [ 45.653431][ T405] ? __pfx_vfs_write+0x10/0x10 [ 45.653572][ T405] ? find_held_lock+0x2c/0x110 [ 45.653716][ T405] ? __pfx___lock_release+0x10/0x10 [ 45.653853][ T405] ? __fget_light+0x53/0x1e0 [ 45.653992][ T405] ksys_write+0xf5/0x1e0 [ 45.654097][ T405] ? __pfx_ksys_write+0x10/0x10 [ 45.654326][ T405] ? do_user_addr_fault+0x4bd/0xbe0 [ 45.654462][ T405] do_syscall_64+0xc6/0x1e0 [ 45.654599][ T405] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 45.654780][ T405] RIP: 0033:0x7f611c395957 [ 45.655019][ T405] 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 [ 45.655509][ T405] RSP: 002b:00007ffc8754dfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 45.655801][ T405] RAX: ffffffffffffffda RBX: 000055ff76b22360 RCX: 00007f611c395957 [ 45.656025][ T405] RDX: 0000000000000002 RSI: 000055ff76b223a0 RDI: 0000000000000005 [ 45.656324][ T405] RBP: 000055ff76b244d0 R08: 0000000000000003 R09: 0000000000000077 [ 45.656532][ T405] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 45.656733][ T405] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f611c44c9c0 [ 45.657028][ T405]