[ 56.635990][ T623] [ 56.636102][ T623] ===================================================== [ 56.636272][ T623] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 56.636476][ T623] 6.9.0-rc1-virtme #1 Not tainted [ 56.636619][ T623] ----------------------------------------------------- [ 56.636787][ T623] sysctl/623 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 56.636993][ T623] ffff8880063c8968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 56.637253][ T623] [ 56.637253][ T623] and this task is already holding: [ 56.637454][ T623] ffff8880087c5580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 56.637704][ T623] which would create a new lock dependency: [ 56.637868][ T623] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 56.638080][ T623] [ 56.638080][ T623] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 56.638309][ T623] (&ndev->lock){++--}-{2:2} [ 56.638313][ T623] [ 56.638313][ T623] ... which became SOFTIRQ-irq-safe at: [ 56.638650][ T623] __lock_acquire+0x797/0x1570 [ 56.638790][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.638930][ T623] _raw_write_lock+0x30/0x40 [ 56.639068][ T623] addrconf_rs_timer+0xa9/0x730 [ 56.639206][ T623] call_timer_fn+0x13b/0x230 [ 56.639341][ T623] __run_timers+0x545/0x810 [ 56.639477][ T623] run_timer_softirq+0xe8/0x1b0 [ 56.639611][ T623] __do_softirq+0x1f8/0x5df [ 56.639749][ T623] irq_exit_rcu+0x97/0xc0 [ 56.639889][ T623] sysvec_apic_timer_interrupt+0x75/0x80 [ 56.640027][ T623] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 56.640204][ T623] lock_acquire.part.0+0x119/0x330 [ 56.640338][ T623] is_bpf_text_address+0x37/0x120 [ 56.640478][ T623] kernel_text_address+0xce/0xe0 [ 56.640613][ T623] __kernel_text_address+0x12/0x40 [ 56.640749][ T623] unwind_get_return_address+0x5e/0xa0 [ 56.640897][ T623] arch_stack_walk+0xa2/0xf0 [ 56.641038][ T623] stack_trace_save+0x94/0xd0 [ 56.641181][ T623] set_track_prepare+0x31/0x70 [ 56.641315][ T623] ___slab_alloc+0xe8b/0x10a0 [ 56.641451][ T623] kmem_cache_alloc_lru+0x243/0x270 [ 56.641586][ T623] alloc_inode+0x13b/0x200 [ 56.641722][ T623] new_inode_pseudo+0x11/0x70 [ 56.641859][ T623] create_pipe_files+0x4c/0x750 [ 56.641995][ T623] do_pipe2+0x7d/0x160 [ 56.642100][ T623] __x64_sys_pipe+0x33/0x50 [ 56.642239][ T623] do_syscall_64+0xc6/0x1e0 [ 56.642373][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.642542][ T623] [ 56.642542][ T623] to a SOFTIRQ-irq-unsafe lock: [ 56.642706][ T623] (&p->alloc_lock){+.+.}-{2:2} [ 56.642710][ T623] [ 56.642710][ T623] ... which became SOFTIRQ-irq-unsafe at: [ 56.643047][ T623] ... [ 56.643049][ T623] __lock_acquire+0x797/0x1570 [ 56.643259][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.643393][ T623] _raw_spin_lock+0x30/0x40 [ 56.643529][ T623] set_mems_allowed+0x1d/0x210 [ 56.643667][ T623] kernel_init_freeable+0x72/0x310 [ 56.643806][ T623] kernel_init+0x20/0x200 [ 56.643941][ T623] ret_from_fork+0x31/0x70 [ 56.644082][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.644222][ T623] [ 56.644222][ T623] other info that might help us debug this: [ 56.644222][ T623] [ 56.644491][ T623] Possible interrupt unsafe locking scenario: [ 56.644491][ T623] [ 56.644695][ T623] CPU0 CPU1 [ 56.644832][ T623] ---- ---- [ 56.644970][ T623] lock(&p->alloc_lock); [ 56.645077][ T623] local_irq_disable(); [ 56.645251][ T623] lock(&ndev->lock); [ 56.645430][ T623] lock(&p->alloc_lock); [ 56.645598][ T623] [ 56.645700][ T623] lock(&ndev->lock); [ 56.645803][ T623] [ 56.645803][ T623] *** DEADLOCK *** [ 56.645803][ T623] [ 56.646002][ T623] 3 locks held by sysctl/623: [ 56.646148][ T623] #0: ffff88800600c3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 56.646392][ T623] #1: ffffffffb85b7208 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 56.646674][ T623] #2: ffff8880087c5580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 56.646912][ T623] [ 56.646912][ T623] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 56.647178][ T623] -> (&ndev->lock){++--}-{2:2} { [ 56.647322][ T623] HARDIRQ-ON-W at: [ 56.647424][ T623] __lock_acquire+0x797/0x1570 [ 56.647603][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.647776][ T623] _raw_write_lock_bh+0x38/0x50 [ 56.647945][ T623] addrconf_permanent_addr+0x6e/0x670 [ 56.648124][ T623] addrconf_notify+0x749/0xd60 [ 56.648297][ T623] notifier_call_chain+0xcd/0x150 [ 56.648466][ T623] __dev_notify_flags+0xe6/0x250 [ 56.648643][ T623] dev_change_flags+0xec/0x160 [ 56.648813][ T623] do_setlink+0x7d6/0x21e0 [ 56.648989][ T623] __rtnl_newlink+0xaa7/0xd80 [ 56.649164][ T623] rtnl_newlink+0x63/0xa0 [ 56.649334][ T623] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 56.649504][ T623] netlink_rcv_skb+0x130/0x360 [ 56.649678][ T623] netlink_unicast+0x449/0x710 [ 56.649849][ T623] netlink_sendmsg+0x723/0xbe0 [ 56.650023][ T623] ____sys_sendmsg+0x7b2/0xa10 [ 56.650198][ T623] ___sys_sendmsg+0xee/0x170 [ 56.650369][ T623] __sys_sendmsg+0xcd/0x170 [ 56.650541][ T623] do_syscall_64+0xc6/0x1e0 [ 56.650709][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.650922][ T623] HARDIRQ-ON-R at: [ 56.651026][ T623] __lock_acquire+0x797/0x1570 [ 56.651205][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.651374][ T623] _raw_read_lock_bh+0x44/0x80 [ 56.651542][ T623] inet6_fill_ifla6_attrs+0x516/0x740 [ 56.651715][ T623] inet6_fill_link_af+0x5e/0xe0 [ 56.651882][ T623] rtnl_fill_ifinfo+0x1615/0x2a90 [ 56.652055][ T623] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 56.652227][ T623] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 56.652431][ T623] rtmsg_ifinfo+0x5b/0xa0 [ 56.652600][ T623] register_netdevice+0x1177/0x1690 [ 56.652770][ T623] register_netdev+0x20/0x40 [ 56.652945][ T623] vti6_init_net+0x25d/0x380 [ 56.653122][ T623] ops_init+0x9b/0x560 [ 56.653258][ T623] register_pernet_operations+0x2db/0x710 [ 56.653463][ T623] register_pernet_device+0x2a/0x60 [ 56.653631][ T623] vti6_tunnel_init+0x18/0x110 [ 56.653802][ T623] do_one_initcall+0x8d/0x1e0 [ 56.653972][ T623] do_initcalls+0x1b2/0x3e0 [ 56.654149][ T623] kernel_init_freeable+0x232/0x310 [ 56.654318][ T623] kernel_init+0x20/0x200 [ 56.654487][ T623] ret_from_fork+0x31/0x70 [ 56.654659][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.654829][ T623] IN-SOFTIRQ-W at: [ 56.654931][ T623] __lock_acquire+0x797/0x1570 [ 56.655104][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.655280][ T623] _raw_write_lock+0x30/0x40 [ 56.655449][ T623] addrconf_rs_timer+0xa9/0x730 [ 56.655618][ T623] call_timer_fn+0x13b/0x230 [ 56.655791][ T623] __run_timers+0x545/0x810 [ 56.655964][ T623] run_timer_softirq+0xe8/0x1b0 [ 56.656143][ T623] __do_softirq+0x1f8/0x5df [ 56.656321][ T623] irq_exit_rcu+0x97/0xc0 [ 56.656494][ T623] sysvec_apic_timer_interrupt+0x75/0x80 [ 56.656703][ T623] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 56.656911][ T623] lock_acquire.part.0+0x119/0x330 [ 56.657086][ T623] is_bpf_text_address+0x37/0x120 [ 56.657260][ T623] kernel_text_address+0xce/0xe0 [ 56.657439][ T623] __kernel_text_address+0x12/0x40 [ 56.657616][ T623] unwind_get_return_address+0x5e/0xa0 [ 56.657789][ T623] arch_stack_walk+0xa2/0xf0 [ 56.657964][ T623] stack_trace_save+0x94/0xd0 [ 56.658138][ T623] set_track_prepare+0x31/0x70 [ 56.658313][ T623] ___slab_alloc+0xe8b/0x10a0 [ 56.658489][ T623] kmem_cache_alloc_lru+0x243/0x270 [ 56.658664][ T623] alloc_inode+0x13b/0x200 [ 56.658838][ T623] new_inode_pseudo+0x11/0x70 [ 56.659009][ T623] create_pipe_files+0x4c/0x750 [ 56.659190][ T623] do_pipe2+0x7d/0x160 [ 56.659327][ T623] __x64_sys_pipe+0x33/0x50 [ 56.659502][ T623] do_syscall_64+0xc6/0x1e0 [ 56.659678][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.659887][ T623] IN-SOFTIRQ-R at: [ 56.660072][ T623] __lock_acquire+0x797/0x1570 [ 56.660244][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.660416][ T623] _raw_read_lock_bh+0x44/0x80 [ 56.660591][ T623] ipv6_get_lladdr+0xa9/0x3e0 [ 56.660859][ T623] addrconf_rs_timer+0x24a/0x730 [ 56.661034][ T623] call_timer_fn+0x13b/0x230 [ 56.661209][ T623] __run_timers+0x545/0x810 [ 56.661467][ T623] run_timer_softirq+0xe8/0x1b0 [ 56.661638][ T623] __do_softirq+0x1f8/0x5df [ 56.661811][ T623] irq_exit_rcu+0x97/0xc0 [ 56.661982][ T623] sysvec_apic_timer_interrupt+0x75/0x80 [ 56.662278][ T623] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 56.662486][ T623] lock_acquire.part.0+0x119/0x330 [ 56.662658][ T623] is_bpf_text_address+0x37/0x120 [ 56.662911][ T623] kernel_text_address+0xce/0xe0 [ 56.663085][ T623] __kernel_text_address+0x12/0x40 [ 56.663260][ T623] unwind_get_return_address+0x5e/0xa0 [ 56.663524][ T623] arch_stack_walk+0xa2/0xf0 [ 56.663698][ T623] stack_trace_save+0x94/0xd0 [ 56.663867][ T623] set_track_prepare+0x31/0x70 [ 56.664116][ T623] ___slab_alloc+0xe8b/0x10a0 [ 56.664287][ T623] kmem_cache_alloc_lru+0x243/0x270 [ 56.664459][ T623] alloc_inode+0x13b/0x200 [ 56.664634][ T623] new_inode_pseudo+0x11/0x70 [ 56.664886][ T623] create_pipe_files+0x4c/0x750 [ 56.665055][ T623] do_pipe2+0x7d/0x160 [ 56.665198][ T623] __x64_sys_pipe+0x33/0x50 [ 56.665452][ T623] do_syscall_64+0xc6/0x1e0 [ 56.665625][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.665829][ T623] INITIAL USE at: [ 56.665937][ T623] __lock_acquire+0x797/0x1570 [ 56.666188][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.666362][ T623] _raw_write_lock_bh+0x38/0x50 [ 56.666537][ T623] addrconf_permanent_addr+0x6e/0x670 [ 56.666787][ T623] addrconf_notify+0x749/0xd60 [ 56.666958][ T623] notifier_call_chain+0xcd/0x150 [ 56.667137][ T623] __dev_notify_flags+0xe6/0x250 [ 56.667313][ T623] dev_change_flags+0xec/0x160 [ 56.667569][ T623] do_setlink+0x7d6/0x21e0 [ 56.667738][ T623] __rtnl_newlink+0xaa7/0xd80 [ 56.667907][ T623] rtnl_newlink+0x63/0xa0 [ 56.668156][ T623] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 56.668326][ T623] netlink_rcv_skb+0x130/0x360 [ 56.668503][ T623] netlink_unicast+0x449/0x710 [ 56.668676][ T623] netlink_sendmsg+0x723/0xbe0 [ 56.668932][ T623] ____sys_sendmsg+0x7b2/0xa10 [ 56.669104][ T623] ___sys_sendmsg+0xee/0x170 [ 56.669272][ T623] __sys_sendmsg+0xcd/0x170 [ 56.669530][ T623] do_syscall_64+0xc6/0x1e0 [ 56.669701][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.669911][ T623] INITIAL READ USE at: [ 56.670013][ T623] __lock_acquire+0x797/0x1570 [ 56.670267][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.670437][ T623] _raw_read_lock_bh+0x44/0x80 [ 56.670608][ T623] inet6_fill_ifla6_attrs+0x516/0x740 [ 56.671019][ T623] inet6_fill_link_af+0x5e/0xe0 [ 56.671197][ T623] rtnl_fill_ifinfo+0x1615/0x2a90 [ 56.671369][ T623] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 56.671654][ T623] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 56.671855][ T623] rtmsg_ifinfo+0x5b/0xa0 [ 56.672025][ T623] register_netdevice+0x1177/0x1690 [ 56.672308][ T623] register_netdev+0x20/0x40 [ 56.672481][ T623] vti6_init_net+0x25d/0x380 [ 56.672651][ T623] ops_init+0x9b/0x560 [ 56.672901][ T623] register_pernet_operations+0x2db/0x710 [ 56.673104][ T623] register_pernet_device+0x2a/0x60 [ 56.673306][ T623] vti6_tunnel_init+0x18/0x110 [ 56.673562][ T623] do_one_initcall+0x8d/0x1e0 [ 56.673733][ T623] do_initcalls+0x1b2/0x3e0 [ 56.673905][ T623] kernel_init_freeable+0x232/0x310 [ 56.674108][ T623] kernel_init+0x20/0x200 [ 56.674360][ T623] ret_from_fork+0x31/0x70 [ 56.674533][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.674706][ T623] } [ 56.674775][ T623] ... key at: [] __key.37+0x0/0x40 [ 56.675059][ T623] [ 56.675059][ T623] the dependencies between the lock to be acquired [ 56.675061][ T623] and SOFTIRQ-irq-unsafe lock: [ 56.675424][ T623] -> (&p->alloc_lock){+.+.}-{2:2} { [ 56.675647][ T623] HARDIRQ-ON-W at: [ 56.675751][ T623] __lock_acquire+0x797/0x1570 [ 56.675924][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.676111][ T623] _raw_spin_lock+0x30/0x40 [ 56.676364][ T623] set_mems_allowed+0x1d/0x210 [ 56.676537][ T623] kernel_init_freeable+0x72/0x310 [ 56.676707][ T623] kernel_init+0x20/0x200 [ 56.676959][ T623] ret_from_fork+0x31/0x70 [ 56.677129][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.677302][ T623] SOFTIRQ-ON-W at: [ 56.677403][ T623] __lock_acquire+0x797/0x1570 [ 56.677654][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.677824][ T623] _raw_spin_lock+0x30/0x40 [ 56.677994][ T623] set_mems_allowed+0x1d/0x210 [ 56.678244][ T623] kernel_init_freeable+0x72/0x310 [ 56.678415][ T623] kernel_init+0x20/0x200 [ 56.678589][ T623] ret_from_fork+0x31/0x70 [ 56.678761][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.679015][ T623] INITIAL USE at: [ 56.679116][ T623] __lock_acquire+0x797/0x1570 [ 56.679284][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.679535][ T623] _raw_spin_lock+0x30/0x40 [ 56.679706][ T623] set_mems_allowed+0x1d/0x210 [ 56.679881][ T623] kernel_init_freeable+0x72/0x310 [ 56.680053][ T623] kernel_init+0x20/0x200 [ 56.680303][ T623] ret_from_fork+0x31/0x70 [ 56.680474][ T623] ret_from_fork_asm+0x1a/0x30 [ 56.680645][ T623] } [ 56.680715][ T623] ... key at: [] __key.388+0x0/0x40 [ 56.681013][ T623] ... acquired at: [ 56.681122][ T623] check_prev_add+0x194/0xce0 [ 56.681263][ T623] validate_chain+0x71d/0x9b0 [ 56.681398][ T623] __lock_acquire+0xaf0/0x1570 [ 56.681697][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.681833][ T623] _raw_spin_lock+0x30/0x40 [ 56.681968][ T623] __get_task_comm+0x27/0x70 [ 56.682105][ T623] ref_tracker_alloc+0x2ee/0x490 [ 56.682242][ T623] netdev_get_by_index+0x5e/0x80 [ 56.682381][ T623] fib6_nh_init+0x3d8/0x1580 [ 56.682518][ T623] ip6_route_info_create+0xf18/0x17d0 [ 56.682654][ T623] addrconf_f6i_alloc+0x265/0x560 [ 56.682868][ T623] __ipv6_dev_ac_inc+0x25f/0xb10 [ 56.683005][ T623] addrconf_join_anycast+0x1c0/0x220 [ 56.683142][ T623] dev_forward_change+0x2a6/0x7b0 [ 56.683278][ T623] addrconf_fixup_forwarding+0x23f/0x460 [ 56.683523][ T623] addrconf_sysctl_forward+0x212/0x2b0 [ 56.683664][ T623] proc_sys_call_handler+0x403/0x5e0 [ 56.683802][ T623] vfs_write+0x9e5/0x10a0 [ 56.683940][ T623] ksys_write+0xf5/0x1e0 [ 56.684076][ T623] do_syscall_64+0xc6/0x1e0 [ 56.684292][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.684462][ T623] [ 56.684530][ T623] [ 56.684530][ T623] stack backtrace: [ 56.684696][ T623] CPU: 2 PID: 623 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 56.684982][ T623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 56.685279][ T623] Call Trace: [ 56.685391][ T623] [ 56.685543][ T623] dump_stack_lvl+0x82/0xd0 [ 56.685683][ T623] print_bad_irq_dependency+0x957/0xd40 [ 56.685820][ T623] ? hlock_class+0x4e/0x130 [ 56.685958][ T623] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 56.686210][ T623] ? __pfx_usage_skip+0x10/0x10 [ 56.686349][ T623] ? __bfs+0x246/0x650 [ 56.686452][ T623] ? __pfx_usage_match+0x10/0x10 [ 56.686590][ T623] check_irq_usage+0x596/0x850 [ 56.686729][ T623] ? __pfx_check_irq_usage+0x10/0x10 [ 56.686947][ T623] ? __bfs+0x246/0x650 [ 56.687051][ T623] ? __pfx_hlock_conflict+0x10/0x10 [ 56.687188][ T623] ? check_path.constprop.0+0x24/0x50 [ 56.687327][ T623] ? check_noncircular+0x14c/0x3e0 [ 56.687541][ T623] ? __pfx_check_noncircular+0x10/0x10 [ 56.687681][ T623] ? check_prev_add+0x194/0xce0 [ 56.687820][ T623] check_prev_add+0x194/0xce0 [ 56.687958][ T623] ? validate_chain+0x130/0x9b0 [ 56.688174][ T623] validate_chain+0x71d/0x9b0 [ 56.688311][ T623] ? mark_lock+0x38/0x3e0 [ 56.688415][ T623] ? __pfx_validate_chain+0x10/0x10 [ 56.688562][ T623] ? hlock_class+0x4e/0x130 [ 56.688700][ T623] ? mark_lock+0x38/0x3e0 [ 56.688882][ T623] __lock_acquire+0xaf0/0x1570 [ 56.689021][ T623] lock_acquire.part.0+0xeb/0x330 [ 56.689158][ T623] ? __get_task_comm+0x27/0x70 [ 56.689294][ T623] ? mark_lock+0x38/0x3e0 [ 56.689398][ T623] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 56.689615][ T623] ? trace_lock_acquire+0x135/0x1c0 [ 56.689751][ T623] ? __get_task_comm+0x27/0x70 [ 56.689892][ T623] ? lock_acquire+0x32/0xc0 [ 56.690029][ T623] ? __get_task_comm+0x27/0x70 [ 56.690244][ T623] _raw_spin_lock+0x30/0x40 [ 56.690380][ T623] ? __get_task_comm+0x27/0x70 [ 56.690515][ T623] __get_task_comm+0x27/0x70 [ 56.690653][ T623] ref_tracker_alloc+0x2ee/0x490 [ 56.690877][ T623] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 56.691020][ T623] ? dev_get_by_index+0x177/0x270 [ 56.691155][ T623] ? netdev_get_by_index+0x5e/0x80 [ 56.691296][ T623] ? fib6_nh_init+0x3d8/0x1580 [ 56.691510][ T623] ? ip6_route_info_create+0xf18/0x17d0 [ 56.691646][ T623] ? addrconf_f6i_alloc+0x265/0x560 [ 56.691781][ T623] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 56.691916][ T623] ? addrconf_join_anycast+0x1c0/0x220 [ 56.692053][ T623] ? dev_forward_change+0x2a6/0x7b0 [ 56.692346][ T623] ? addrconf_fixup_forwarding+0x23f/0x460 [ 56.692520][ T623] ? addrconf_sysctl_forward+0x212/0x2b0 [ 56.692657][ T623] ? proc_sys_call_handler+0x403/0x5e0 [ 56.692792][ T623] ? vfs_write+0x9e5/0x10a0 [ 56.693009][ T623] ? ksys_write+0xf5/0x1e0 [ 56.693144][ T623] ? do_syscall_64+0xc6/0x1e0 [ 56.693278][ T623] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.693447][ T623] ? dev_get_by_index+0x177/0x270 [ 56.693661][ T623] netdev_get_by_index+0x5e/0x80 [ 56.693798][ T623] fib6_nh_init+0x3d8/0x1580 [ 56.693934][ T623] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 56.694101][ T623] ? __pfx_fib6_nh_init+0x10/0x10 [ 56.694316][ T623] ? kasan_save_track+0x14/0x30 [ 56.694452][ T623] ? __kasan_kmalloc+0x7f/0x90 [ 56.694589][ T623] ? __kmalloc+0x1d7/0x3c0 [ 56.694730][ T623] ? fib6_get_table+0x116/0x290 [ 56.694946][ T623] ip6_route_info_create+0xf18/0x17d0 [ 56.695079][ T623] ? __lock_release+0x103/0x460 [ 56.695220][ T623] ? __pfx_ip6_route_info_create+0x10/0x10 [ 56.695389][ T623] ? addrconf_f6i_alloc+0x12d/0x560 [ 56.695606][ T623] addrconf_f6i_alloc+0x265/0x560 [ 56.695742][ T623] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 56.695882][ T623] ? do_raw_write_lock+0x122/0x3b0 [ 56.696018][ T623] ? __pfx_do_raw_write_lock+0x10/0x10 [ 56.696232][ T623] ? lock_acquire+0x32/0xc0 [ 56.696374][ T623] __ipv6_dev_ac_inc+0x25f/0xb10 [ 56.696512][ T623] addrconf_join_anycast+0x1c0/0x220 [ 56.696647][ T623] ? mark_lock+0x38/0x3e0 [ 56.696751][ T623] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 56.696998][ T623] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 56.697167][ T623] dev_forward_change+0x2a6/0x7b0 [ 56.697301][ T623] ? __pfx_dev_forward_change+0x10/0x10 [ 56.697517][ T623] addrconf_fixup_forwarding+0x23f/0x460 [ 56.697660][ T623] addrconf_sysctl_forward+0x212/0x2b0 [ 56.697797][ T623] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 56.697969][ T623] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 56.698218][ T623] ? trace_kmalloc+0x2a/0xe0 [ 56.698353][ T623] ? __kmalloc_node+0x220/0x400 [ 56.698490][ T623] ? proc_sys_call_handler+0x30b/0x5e0 [ 56.698628][ T623] proc_sys_call_handler+0x403/0x5e0 [ 56.698847][ T623] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 56.699016][ T623] ? __lock_acquire+0xaf0/0x1570 [ 56.699154][ T623] vfs_write+0x9e5/0x10a0 [ 56.699258][ T623] ? do_user_addr_fault+0x449/0xbe0 [ 56.699395][ T623] ? __pfx_vfs_write+0x10/0x10 [ 56.699611][ T623] ? find_held_lock+0x2c/0x110 [ 56.699750][ T623] ? __pfx___lock_release+0x10/0x10 [ 56.699884][ T623] ? __fget_light+0x53/0x1e0 [ 56.700021][ T623] ksys_write+0xf5/0x1e0 [ 56.700207][ T623] ? __pfx_ksys_write+0x10/0x10 [ 56.700345][ T623] ? do_user_addr_fault+0x4bd/0xbe0 [ 56.700481][ T623] do_syscall_64+0xc6/0x1e0 [ 56.700616][ T623] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 56.700869][ T623] RIP: 0033:0x7f7738012957 [ 56.701012][ T623] 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 [ 56.701571][ T623] RSP: 002b:00007ffdaa8654e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 56.701781][ T623] RAX: ffffffffffffffda RBX: 00005561d7ab4360 RCX: 00007f7738012957 [ 56.701985][ T623] RDX: 0000000000000002 RSI: 00005561d7ab43a0 RDI: 0000000000000005 [ 56.702268][ T623] RBP: 00005561d7ab64d0 R08: 0000000000000003 R09: 0000000000000077 [ 56.702509][ T623] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 56.702714][ T623] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f77380c99c0 [ 56.703078][ T623] [ 58.861278][ T645] Mirror/redirect action on