[ 25.544032][ T258] ip (258) used greatest stack depth: 23696 bytes left [ 30.690615][ T309] gre: GRE over IPv4 demultiplexor driver [ 30.738099][ T309] ip6_gre: GRE over IPv6 tunneling driver [ 31.097747][ T314] ip (314) used greatest stack depth: 23232 bytes left [ 32.772612][ T330] 8021q: 802.1Q VLAN Support v1.8 [ 36.838590][ T368] GACT probability NOT on [ 40.617944][ T401] [ 40.618068][ T401] ===================================================== [ 40.618257][ T401] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 40.618484][ T401] 6.9.0-rc1-virtme #1 Not tainted [ 40.618653][ T401] ----------------------------------------------------- [ 40.618837][ T401] sysctl/401 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 40.619047][ T401] ffff888007ae2c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 40.619306][ T401] [ 40.619306][ T401] and this task is already holding: [ 40.619519][ T401] ffff88800288ed80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 40.619770][ T401] which would create a new lock dependency: [ 40.619938][ T401] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 40.620157][ T401] [ 40.620157][ T401] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 40.620391][ T401] (&ndev->lock){++--}-{2:2} [ 40.620395][ T401] [ 40.620395][ T401] ... which became SOFTIRQ-irq-safe at: [ 40.620732][ T401] __lock_acquire+0x797/0x1570 [ 40.620879][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.621017][ T401] _raw_write_lock+0x30/0x40 [ 40.621193][ T401] addrconf_rs_timer+0xa9/0x730 [ 40.621344][ T401] call_timer_fn+0x13b/0x230 [ 40.621498][ T401] __run_timers+0x545/0x810 [ 40.621645][ T401] run_timer_softirq+0xe8/0x1b0 [ 40.621795][ T401] __do_softirq+0x1f8/0x5df [ 40.621945][ T401] irq_exit_rcu+0x97/0xc0 [ 40.622101][ T401] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.622252][ T401] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.622438][ T401] ftrace_graph_ret_addr+0x44/0x140 [ 40.622590][ T401] unwind_next_frame+0x8fe/0x1d00 [ 40.622741][ T401] arch_stack_walk+0x8c/0xf0 [ 40.622890][ T401] stack_trace_save+0x94/0xd0 [ 40.623038][ T401] kasan_save_stack+0x24/0x50 [ 40.623187][ T401] kasan_save_track+0x14/0x30 [ 40.623343][ T401] kasan_save_free_info+0x3b/0x60 [ 40.623490][ T401] __kasan_slab_free+0xf4/0x180 [ 40.623637][ T401] kfree+0xd3/0x230 [ 40.623753][ T401] p9_req_put+0x1bc/0x210 [ 40.623901][ T401] p9_client_readlink+0xd3/0x120 [ 40.624047][ T401] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.624196][ T401] pick_link+0x8b4/0x1160 [ 40.624345][ T401] step_into+0x84e/0xfa0 [ 40.624459][ T401] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.624643][ T401] path_lookupat+0x72/0x660 [ 40.624791][ T401] filename_lookup+0x19e/0x420 [ 40.624939][ T401] vfs_statx+0xe8/0x460 [ 40.625054][ T401] vfs_fstatat+0x93/0xc0 [ 40.625165][ T401] __do_sys_newfstatat+0x6b/0xc0 [ 40.625322][ T401] do_syscall_64+0xc6/0x1e0 [ 40.625474][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.625661][ T401] [ 40.625661][ T401] to a SOFTIRQ-irq-unsafe lock: [ 40.625843][ T401] (&p->alloc_lock){+.+.}-{2:2} [ 40.625847][ T401] [ 40.625847][ T401] ... which became SOFTIRQ-irq-unsafe at: [ 40.626202][ T401] ... [ 40.626203][ T401] __lock_acquire+0x797/0x1570 [ 40.626429][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.626577][ T401] _raw_spin_lock+0x30/0x40 [ 40.626724][ T401] set_mems_allowed+0x1d/0x210 [ 40.626871][ T401] kernel_init_freeable+0x72/0x310 [ 40.627023][ T401] kernel_init+0x20/0x200 [ 40.627169][ T401] ret_from_fork+0x31/0x70 [ 40.627317][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.627461][ T401] [ 40.627461][ T401] other info that might help us debug this: [ 40.627461][ T401] [ 40.627754][ T401] Possible interrupt unsafe locking scenario: [ 40.627754][ T401] [ 40.627967][ T401] CPU0 CPU1 [ 40.628112][ T401] ---- ---- [ 40.628264][ T401] lock(&p->alloc_lock); [ 40.628387][ T401] local_irq_disable(); [ 40.628567][ T401] lock(&ndev->lock); [ 40.628749][ T401] lock(&p->alloc_lock); [ 40.628932][ T401] [ 40.629042][ T401] lock(&ndev->lock); [ 40.629156][ T401] [ 40.629156][ T401] *** DEADLOCK *** [ 40.629156][ T401] [ 40.629372][ T401] 3 locks held by sysctl/401: [ 40.629520][ T401] #0: ffff888005ecc3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 40.629785][ T401] #1: ffffffffb41969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 40.630082][ T401] #2: ffff88800288ed80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 40.630341][ T401] [ 40.630341][ T401] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 40.630632][ T401] -> (&ndev->lock){++--}-{2:2} { [ 40.630786][ T401] HARDIRQ-ON-W at: [ 40.630900][ T401] __lock_acquire+0x797/0x1570 [ 40.631092][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.631279][ T401] _raw_write_lock_bh+0x38/0x50 [ 40.631469][ T401] addrconf_permanent_addr+0x6e/0x670 [ 40.631657][ T401] addrconf_notify+0x749/0xd60 [ 40.631846][ T401] notifier_call_chain+0xcd/0x150 [ 40.632038][ T401] __dev_notify_flags+0xe6/0x250 [ 40.632223][ T401] dev_change_flags+0xec/0x160 [ 40.632414][ T401] do_setlink+0x7d6/0x21e0 [ 40.632603][ T401] __rtnl_newlink+0xaa7/0xd80 [ 40.632795][ T401] rtnl_newlink+0x63/0xa0 [ 40.632983][ T401] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 40.633169][ T401] netlink_rcv_skb+0x130/0x360 [ 40.633360][ T401] netlink_unicast+0x449/0x710 [ 40.633547][ T401] netlink_sendmsg+0x723/0xbe0 [ 40.633732][ T401] ____sys_sendmsg+0x7b2/0xa10 [ 40.633922][ T401] ___sys_sendmsg+0xee/0x170 [ 40.634110][ T401] __sys_sendmsg+0xcd/0x170 [ 40.634295][ T401] do_syscall_64+0xc6/0x1e0 [ 40.634483][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.634701][ T401] HARDIRQ-ON-R at: [ 40.634812][ T401] __lock_acquire+0x797/0x1570 [ 40.634997][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.635183][ T401] _raw_read_lock_bh+0x44/0x80 [ 40.635420][ T401] inet6_fill_ifla6_attrs+0x516/0x740 [ 40.635605][ T401] inet6_fill_link_af+0x5e/0xe0 [ 40.635790][ T401] rtnl_fill_ifinfo+0x1612/0x29e0 [ 40.635976][ T401] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 40.636193][ T401] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 40.636420][ T401] rtmsg_ifinfo+0x5b/0xa0 [ 40.636606][ T401] register_netdevice+0x1177/0x1690 [ 40.636792][ T401] register_netdev+0x20/0x40 [ 40.636977][ T401] sit_init_net+0x250/0x4f0 [ 40.637164][ T401] ops_init+0x9b/0x560 [ 40.637313][ T401] register_pernet_operations+0x2db/0x710 [ 40.637531][ T401] register_pernet_device+0x2a/0x60 [ 40.637719][ T401] sit_init+0x23/0xe0 [ 40.637871][ T401] do_one_initcall+0x8d/0x1e0 [ 40.638059][ T401] do_initcalls+0x1b2/0x3e0 [ 40.638244][ T401] kernel_init_freeable+0x232/0x310 [ 40.638429][ T401] kernel_init+0x20/0x200 [ 40.638613][ T401] ret_from_fork+0x31/0x70 [ 40.638804][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.638989][ T401] IN-SOFTIRQ-W at: [ 40.639101][ T401] __lock_acquire+0x797/0x1570 [ 40.639284][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.639469][ T401] _raw_write_lock+0x30/0x40 [ 40.639657][ T401] addrconf_rs_timer+0xa9/0x730 [ 40.639841][ T401] call_timer_fn+0x13b/0x230 [ 40.640033][ T401] __run_timers+0x545/0x810 [ 40.640219][ T401] run_timer_softirq+0xe8/0x1b0 [ 40.640406][ T401] __do_softirq+0x1f8/0x5df [ 40.640589][ T401] irq_exit_rcu+0x97/0xc0 [ 40.640773][ T401] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.640994][ T401] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.641219][ T401] ftrace_graph_ret_addr+0x44/0x140 [ 40.641404][ T401] unwind_next_frame+0x8fe/0x1d00 [ 40.641592][ T401] arch_stack_walk+0x8c/0xf0 [ 40.641775][ T401] stack_trace_save+0x94/0xd0 [ 40.641962][ T401] kasan_save_stack+0x24/0x50 [ 40.642145][ T401] kasan_save_track+0x14/0x30 [ 40.642415][ T401] kasan_save_free_info+0x3b/0x60 [ 40.642605][ T401] __kasan_slab_free+0xf4/0x180 [ 40.642788][ T401] kfree+0xd3/0x230 [ 40.643019][ T401] p9_req_put+0x1bc/0x210 [ 40.643202][ T401] p9_client_readlink+0xd3/0x120 [ 40.643385][ T401] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.643569][ T401] pick_link+0x8b4/0x1160 [ 40.643849][ T401] step_into+0x84e/0xfa0 [ 40.644036][ T401] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.644258][ T401] path_lookupat+0x72/0x660 [ 40.644443][ T401] filename_lookup+0x19e/0x420 [ 40.644628][ T401] vfs_statx+0xe8/0x460 [ 40.644814][ T401] vfs_fstatat+0x93/0xc0 [ 40.645087][ T401] __do_sys_newfstatat+0x6b/0xc0 [ 40.645302][ T401] do_syscall_64+0xc6/0x1e0 [ 40.645490][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.645712][ T401] IN-SOFTIRQ-R at: [ 40.645917][ T401] __lock_acquire+0x797/0x1570 [ 40.646104][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.646291][ T401] _raw_read_lock_bh+0x44/0x80 [ 40.646478][ T401] ipv6_get_lladdr+0xa9/0x3e0 [ 40.646663][ T401] addrconf_rs_timer+0x24a/0x730 [ 40.646851][ T401] call_timer_fn+0x13b/0x230 [ 40.647035][ T401] __run_timers+0x545/0x810 [ 40.647219][ T401] run_timer_softirq+0xe8/0x1b0 [ 40.647403][ T401] __do_softirq+0x1f8/0x5df [ 40.647594][ T401] irq_exit_rcu+0x97/0xc0 [ 40.647778][ T401] sysvec_apic_timer_interrupt+0x75/0x80 [ 40.648001][ T401] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 40.648222][ T401] ftrace_graph_ret_addr+0x44/0x140 [ 40.648495][ T401] unwind_next_frame+0x8fe/0x1d00 [ 40.648679][ T401] arch_stack_walk+0x8c/0xf0 [ 40.648866][ T401] stack_trace_save+0x94/0xd0 [ 40.649050][ T401] kasan_save_stack+0x24/0x50 [ 40.649318][ T401] kasan_save_track+0x14/0x30 [ 40.649500][ T401] kasan_save_free_info+0x3b/0x60 [ 40.649683][ T401] __kasan_slab_free+0xf4/0x180 [ 40.649957][ T401] kfree+0xd3/0x230 [ 40.650107][ T401] p9_req_put+0x1bc/0x210 [ 40.650296][ T401] p9_client_readlink+0xd3/0x120 [ 40.650483][ T401] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 40.650666][ T401] pick_link+0x8b4/0x1160 [ 40.650849][ T401] step_into+0x84e/0xfa0 [ 40.651034][ T401] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 40.651339][ T401] path_lookupat+0x72/0x660 [ 40.651525][ T401] filename_lookup+0x19e/0x420 [ 40.651707][ T401] vfs_statx+0xe8/0x460 [ 40.651977][ T401] vfs_fstatat+0x93/0xc0 [ 40.652159][ T401] __do_sys_newfstatat+0x6b/0xc0 [ 40.652343][ T401] do_syscall_64+0xc6/0x1e0 [ 40.652545][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.652862][ T401] INITIAL USE at: [ 40.652974][ T401] __lock_acquire+0x797/0x1570 [ 40.653160][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.653446][ T401] _raw_write_lock_bh+0x38/0x50 [ 40.653632][ T401] addrconf_permanent_addr+0x6e/0x670 [ 40.653816][ T401] addrconf_notify+0x749/0xd60 [ 40.654002][ T401] notifier_call_chain+0xcd/0x150 [ 40.654279][ T401] __dev_notify_flags+0xe6/0x250 [ 40.654465][ T401] dev_change_flags+0xec/0x160 [ 40.654672][ T401] do_setlink+0x7d6/0x21e0 [ 40.654966][ T401] __rtnl_newlink+0xaa7/0xd80 [ 40.655155][ T401] rtnl_newlink+0x63/0xa0 [ 40.655372][ T401] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 40.655734][ T401] netlink_rcv_skb+0x130/0x360 [ 40.655926][ T401] netlink_unicast+0x449/0x710 [ 40.656114][ T401] netlink_sendmsg+0x723/0xbe0 [ 40.656327][ T401] ____sys_sendmsg+0x7b2/0xa10 [ 40.656510][ T401] ___sys_sendmsg+0xee/0x170 [ 40.656686][ T401] __sys_sendmsg+0xcd/0x170 [ 40.656861][ T401] do_syscall_64+0xc6/0x1e0 [ 40.657127][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.657335][ T401] INITIAL READ USE at: [ 40.657440][ T401] __lock_acquire+0x797/0x1570 [ 40.657624][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.657900][ T401] _raw_read_lock_bh+0x44/0x80 [ 40.658083][ T401] inet6_fill_ifla6_attrs+0x516/0x740 [ 40.658304][ T401] inet6_fill_link_af+0x5e/0xe0 [ 40.658480][ T401] rtnl_fill_ifinfo+0x1612/0x29e0 [ 40.658664][ T401] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 40.658872][ T401] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 40.659081][ T401] rtmsg_ifinfo+0x5b/0xa0 [ 40.659288][ T401] register_netdevice+0x1177/0x1690 [ 40.659521][ T401] register_netdev+0x20/0x40 [ 40.659805][ T401] sit_init_net+0x250/0x4f0 [ 40.660023][ T401] ops_init+0x9b/0x560 [ 40.660268][ T401] register_pernet_operations+0x2db/0x710 [ 40.660605][ T401] register_pernet_device+0x2a/0x60 [ 40.660940][ T401] sit_init+0x23/0xe0 [ 40.661205][ T401] do_one_initcall+0x8d/0x1e0 [ 40.661491][ T401] do_initcalls+0x1b2/0x3e0 [ 40.661731][ T401] kernel_init_freeable+0x232/0x310 [ 40.662071][ T401] kernel_init+0x20/0x200 [ 40.662354][ T401] ret_from_fork+0x31/0x70 [ 40.662779][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.663082][ T401] } [ 40.663208][ T401] ... key at: [] __key.37+0x0/0x40 [ 40.663566][ T401] [ 40.663566][ T401] the dependencies between the lock to be acquired [ 40.663569][ T401] and SOFTIRQ-irq-unsafe lock: [ 40.664332][ T401] -> (&p->alloc_lock){+.+.}-{2:2} { [ 40.664565][ T401] HARDIRQ-ON-W at: [ 40.664746][ T401] __lock_acquire+0x797/0x1570 [ 40.665051][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.665359][ T401] _raw_spin_lock+0x30/0x40 [ 40.665658][ T401] set_mems_allowed+0x1d/0x210 [ 40.665936][ T401] kernel_init_freeable+0x72/0x310 [ 40.666224][ T401] kernel_init+0x20/0x200 [ 40.666521][ T401] ret_from_fork+0x31/0x70 [ 40.666950][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.667240][ T401] SOFTIRQ-ON-W at: [ 40.667409][ T401] __lock_acquire+0x797/0x1570 [ 40.667689][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.667969][ T401] _raw_spin_lock+0x30/0x40 [ 40.668247][ T401] set_mems_allowed+0x1d/0x210 [ 40.668523][ T401] kernel_init_freeable+0x72/0x310 [ 40.668802][ T401] kernel_init+0x20/0x200 [ 40.669082][ T401] ret_from_fork+0x31/0x70 [ 40.669355][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.669637][ T401] INITIAL USE at: [ 40.669949][ T401] __lock_acquire+0x797/0x1570 [ 40.670227][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.670506][ T401] _raw_spin_lock+0x30/0x40 [ 40.670780][ T401] set_mems_allowed+0x1d/0x210 [ 40.671062][ T401] kernel_init_freeable+0x72/0x310 [ 40.671336][ T401] kernel_init+0x20/0x200 [ 40.671613][ T401] ret_from_fork+0x31/0x70 [ 40.671882][ T401] ret_from_fork_asm+0x1a/0x30 [ 40.672160][ T401] } [ 40.672273][ T401] ... key at: [] __key.387+0x0/0x40 [ 40.672618][ T401] ... acquired at: [ 40.672937][ T401] check_prev_add+0x194/0xce0 [ 40.673166][ T401] validate_chain+0x71d/0x9b0 [ 40.673389][ T401] __lock_acquire+0xaf0/0x1570 [ 40.673612][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.673834][ T401] _raw_spin_lock+0x30/0x40 [ 40.674055][ T401] __get_task_comm+0x27/0x70 [ 40.674289][ T401] ref_tracker_alloc+0x2ee/0x490 [ 40.674510][ T401] netdev_get_by_index+0x5e/0x80 [ 40.674742][ T401] fib6_nh_init+0x3d8/0x15b0 [ 40.674972][ T401] ip6_route_info_create+0xf18/0x17d0 [ 40.675217][ T401] addrconf_f6i_alloc+0x265/0x560 [ 40.675449][ T401] __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.675683][ T401] addrconf_join_anycast+0x1c0/0x220 [ 40.676067][ T401] dev_forward_change+0x2a6/0x7b0 [ 40.676306][ T401] addrconf_fixup_forwarding+0x23f/0x460 [ 40.676620][ T401] addrconf_sysctl_forward+0x212/0x2b0 [ 40.676858][ T401] proc_sys_call_handler+0x403/0x5e0 [ 40.677251][ T401] vfs_write+0x9e5/0x10a0 [ 40.677490][ T401] ksys_write+0xf5/0x1e0 [ 40.677731][ T401] do_syscall_64+0xc6/0x1e0 [ 40.677965][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.678383][ T401] [ 40.678508][ T401] [ 40.678508][ T401] stack backtrace: [ 40.678793][ T401] CPU: 3 PID: 401 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 40.679149][ T401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 40.679818][ T401] Call Trace: [ 40.679990][ T401] [ 40.680107][ T401] dump_stack_lvl+0x82/0xd0 [ 40.680343][ T401] print_bad_irq_dependency+0x957/0xd40 [ 40.680714][ T401] ? hlock_class+0x4e/0x130 [ 40.680956][ T401] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 40.681252][ T401] ? __pfx_usage_skip+0x10/0x10 [ 40.681483][ T401] ? __bfs+0x246/0x650 [ 40.681654][ T401] ? __pfx_usage_match+0x10/0x10 [ 40.681885][ T401] check_irq_usage+0x596/0x850 [ 40.682124][ T401] ? __pfx_check_irq_usage+0x10/0x10 [ 40.682355][ T401] ? __bfs+0x246/0x650 [ 40.682529][ T401] ? __pfx_hlock_conflict+0x10/0x10 [ 40.682760][ T401] ? check_path.constprop.0+0x24/0x50 [ 40.683001][ T401] ? check_noncircular+0x14c/0x3e0 [ 40.683234][ T401] ? __pfx_check_noncircular+0x10/0x10 [ 40.683478][ T401] ? check_prev_add+0x194/0xce0 [ 40.683715][ T401] check_prev_add+0x194/0xce0 [ 40.683938][ T401] ? validate_chain+0x130/0x9b0 [ 40.684170][ T401] validate_chain+0x71d/0x9b0 [ 40.684401][ T401] ? mark_lock+0x38/0x3e0 [ 40.684573][ T401] ? __pfx_validate_chain+0x10/0x10 [ 40.684816][ T401] ? hlock_class+0x4e/0x130 [ 40.685043][ T401] ? mark_lock+0x38/0x3e0 [ 40.685233][ T401] __lock_acquire+0xaf0/0x1570 [ 40.685474][ T401] lock_acquire.part.0+0xeb/0x330 [ 40.685715][ T401] ? __get_task_comm+0x27/0x70 [ 40.685954][ T401] ? mark_lock+0x38/0x3e0 [ 40.686134][ T401] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 40.686372][ T401] ? trace_lock_acquire+0x135/0x1c0 [ 40.686612][ T401] ? __get_task_comm+0x27/0x70 [ 40.686858][ T401] ? lock_acquire+0x32/0xc0 [ 40.687097][ T401] ? __get_task_comm+0x27/0x70 [ 40.687337][ T401] _raw_spin_lock+0x30/0x40 [ 40.687580][ T401] ? __get_task_comm+0x27/0x70 [ 40.687809][ T401] __get_task_comm+0x27/0x70 [ 40.688033][ T401] ref_tracker_alloc+0x2ee/0x490 [ 40.688282][ T401] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 40.688509][ T401] ? dev_get_by_index+0x177/0x270 [ 40.688742][ T401] ? netdev_get_by_index+0x5e/0x80 [ 40.688984][ T401] ? fib6_nh_init+0x3d8/0x15b0 [ 40.689220][ T401] ? ip6_route_info_create+0xf18/0x17d0 [ 40.689450][ T401] ? addrconf_f6i_alloc+0x265/0x560 [ 40.689692][ T401] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.689920][ T401] ? addrconf_join_anycast+0x1c0/0x220 [ 40.690156][ T401] ? dev_forward_change+0x2a6/0x7b0 [ 40.690392][ T401] ? addrconf_fixup_forwarding+0x23f/0x460 [ 40.690692][ T401] ? addrconf_sysctl_forward+0x212/0x2b0 [ 40.690932][ T401] ? proc_sys_call_handler+0x403/0x5e0 [ 40.691165][ T401] ? vfs_write+0x9e5/0x10a0 [ 40.691398][ T401] ? ksys_write+0xf5/0x1e0 [ 40.691631][ T401] ? do_syscall_64+0xc6/0x1e0 [ 40.691874][ T401] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.692158][ T401] ? dev_get_by_index+0x177/0x270 [ 40.692396][ T401] netdev_get_by_index+0x5e/0x80 [ 40.692638][ T401] fib6_nh_init+0x3d8/0x15b0 [ 40.692877][ T401] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 40.693181][ T401] ? __pfx_fib6_nh_init+0x10/0x10 [ 40.693403][ T401] ? kasan_save_track+0x14/0x30 [ 40.693643][ T401] ? __kasan_kmalloc+0x7f/0x90 [ 40.693884][ T401] ? __kmalloc+0x1d7/0x3c0 [ 40.694127][ T401] ? fib6_get_table+0x116/0x290 [ 40.694368][ T401] ip6_route_info_create+0xf18/0x17d0 [ 40.694612][ T401] ? __lock_release+0x103/0x460 [ 40.694845][ T401] ? __pfx_ip6_route_info_create+0x10/0x10 [ 40.695137][ T401] ? addrconf_f6i_alloc+0x12d/0x560 [ 40.695403][ T401] addrconf_f6i_alloc+0x265/0x560 [ 40.695626][ T401] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 40.695859][ T401] ? do_raw_write_lock+0x122/0x3b0 [ 40.696078][ T401] ? __pfx_do_raw_write_lock+0x10/0x10 [ 40.696298][ T401] ? lock_acquire+0x32/0xc0 [ 40.696532][ T401] __ipv6_dev_ac_inc+0x25f/0xb10 [ 40.696764][ T401] addrconf_join_anycast+0x1c0/0x220 [ 40.696976][ T401] ? mark_lock+0x38/0x3e0 [ 40.697144][ T401] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 40.697414][ T401] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 40.697700][ T401] dev_forward_change+0x2a6/0x7b0 [ 40.697929][ T401] ? __pfx_dev_forward_change+0x10/0x10 [ 40.698156][ T401] addrconf_fixup_forwarding+0x23f/0x460 [ 40.698394][ T401] addrconf_sysctl_forward+0x212/0x2b0 [ 40.698615][ T401] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 40.698894][ T401] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 40.699161][ T401] ? trace_kmalloc+0x2a/0xe0 [ 40.699388][ T401] ? __kmalloc_node+0x220/0x400 [ 40.699611][ T401] ? proc_sys_call_handler+0x30b/0x5e0 [ 40.699834][ T401] proc_sys_call_handler+0x403/0x5e0 [ 40.700060][ T401] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 40.700335][ T401] ? __lock_acquire+0xaf0/0x1570 [ 40.700579][ T401] vfs_write+0x9e5/0x10a0 [ 40.700752][ T401] ? do_user_addr_fault+0x449/0xbe0 [ 40.700983][ T401] ? __pfx_vfs_write+0x10/0x10 [ 40.701213][ T401] ? find_held_lock+0x2c/0x110 [ 40.701438][ T401] ? __pfx___lock_release+0x10/0x10 [ 40.701659][ T401] ? __fget_light+0x53/0x1e0 [ 40.701904][ T401] ksys_write+0xf5/0x1e0 [ 40.702076][ T401] ? __pfx_ksys_write+0x10/0x10 [ 40.702313][ T401] ? do_user_addr_fault+0x4bd/0xbe0 [ 40.702546][ T401] do_syscall_64+0xc6/0x1e0 [ 40.702782][ T401] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 40.703054][ T401] RIP: 0033:0x7f1e6d1de957 [ 40.703302][ T401] 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 [ 40.704089][ T401] RSP: 002b:00007ffffe88e508 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 40.704410][ T401] RAX: ffffffffffffffda RBX: 00005566d3ebb360 RCX: 00007f1e6d1de957 [ 40.704727][ T401] RDX: 0000000000000002 RSI: 00005566d3ebb3a0 RDI: 0000000000000005 [ 40.705042][ T401] RBP: 00005566d3ebd4d0 R08: 0000000000000003 R09: 0000000000000077 [ 40.705331][ T401] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 40.705538][ T401] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f1e6d2959c0 [ 40.705747][ T401]