[ 82.037138][ T837] [ 82.037248][ T837] ===================================================== [ 82.037433][ T837] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 82.037638][ T837] 6.9.0-rc1-virtme #1 Not tainted [ 82.037778][ T837] ----------------------------------------------------- [ 82.037951][ T837] sysctl/837 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 82.038157][ T837] ffff888006632c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 82.038417][ T837] [ 82.038417][ T837] and this task is already holding: [ 82.038630][ T837] ffff888005e86d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 82.038880][ T837] which would create a new lock dependency: [ 82.039052][ T837] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 82.039290][ T837] [ 82.039290][ T837] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 82.039524][ T837] (&ndev->lock){++--}-{2:2} [ 82.039528][ T837] [ 82.039528][ T837] ... which became SOFTIRQ-irq-safe at: [ 82.039859][ T837] __lock_acquire+0x797/0x1570 [ 82.040002][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.040140][ T837] _raw_write_lock+0x30/0x40 [ 82.040279][ T837] addrconf_rs_timer+0xa9/0x730 [ 82.040423][ T837] call_timer_fn+0x13b/0x230 [ 82.040573][ T837] __run_timers+0x545/0x810 [ 82.040712][ T837] run_timer_softirq+0xe8/0x1b0 [ 82.040850][ T837] __do_softirq+0x1f8/0x5df [ 82.040986][ T837] irq_exit_rcu+0x97/0xc0 [ 82.041124][ T837] sysvec_apic_timer_interrupt+0x75/0x80 [ 82.041264][ T837] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 82.041436][ T837] default_idle+0xf/0x20 [ 82.041543][ T837] default_idle_call+0x6d/0xb0 [ 82.041680][ T837] cpuidle_idle_call+0x1f4/0x280 [ 82.041818][ T837] do_idle+0xf9/0x160 [ 82.041922][ T837] cpu_startup_entry+0x54/0x60 [ 82.042058][ T837] rest_init+0x14f/0x260 [ 82.042162][ T837] start_kernel+0x318/0x3d0 [ 82.042301][ T837] x86_64_start_reservations+0x18/0x30 [ 82.042438][ T837] x86_64_start_kernel+0xba/0x110 [ 82.042583][ T837] common_startup_64+0x12c/0x138 [ 82.042724][ T837] [ 82.042724][ T837] to a SOFTIRQ-irq-unsafe lock: [ 82.042891][ T837] (&p->alloc_lock){+.+.}-{2:2} [ 82.042895][ T837] [ 82.042895][ T837] ... which became SOFTIRQ-irq-unsafe at: [ 82.043225][ T837] ... [ 82.043226][ T837] __lock_acquire+0x797/0x1570 [ 82.043433][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.043570][ T837] _raw_spin_lock+0x30/0x40 [ 82.043718][ T837] set_mems_allowed+0x1d/0x210 [ 82.043855][ T837] kernel_init_freeable+0x72/0x310 [ 82.043988][ T837] kernel_init+0x20/0x200 [ 82.044121][ T837] ret_from_fork+0x31/0x70 [ 82.044255][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.044389][ T837] [ 82.044389][ T837] other info that might help us debug this: [ 82.044389][ T837] [ 82.044647][ T837] Possible interrupt unsafe locking scenario: [ 82.044647][ T837] [ 82.044878][ T837] CPU0 CPU1 [ 82.045014][ T837] ---- ---- [ 82.045150][ T837] lock(&p->alloc_lock); [ 82.045256][ T837] local_irq_disable(); [ 82.045424][ T837] lock(&ndev->lock); [ 82.045598][ T837] lock(&p->alloc_lock); [ 82.045768][ T837] [ 82.045874][ T837] lock(&ndev->lock); [ 82.045989][ T837] [ 82.045989][ T837] *** DEADLOCK *** [ 82.045989][ T837] [ 82.046185][ T837] 3 locks held by sysctl/837: [ 82.046318][ T837] #0: ffff888005e043f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 82.046562][ T837] #1: ffffffffa95b7208 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 82.046834][ T837] #2: ffff888005e86d80 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 82.047079][ T837] [ 82.047079][ T837] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 82.047368][ T837] -> (&ndev->lock){++--}-{2:2} { [ 82.047516][ T837] HARDIRQ-ON-W at: [ 82.047630][ T837] __lock_acquire+0x797/0x1570 [ 82.047811][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.047985][ T837] _raw_write_lock_bh+0x38/0x50 [ 82.048169][ T837] addrconf_permanent_addr+0x6e/0x670 [ 82.048344][ T837] addrconf_notify+0x749/0xd60 [ 82.048524][ T837] notifier_call_chain+0xcd/0x150 [ 82.048699][ T837] __dev_notify_flags+0xe6/0x250 [ 82.048879][ T837] dev_change_flags+0xec/0x160 [ 82.049060][ T837] do_setlink+0x7d6/0x21e0 [ 82.049253][ T837] __rtnl_newlink+0xaa7/0xd80 [ 82.049428][ T837] rtnl_newlink+0x63/0xa0 [ 82.049602][ T837] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 82.049783][ T837] netlink_rcv_skb+0x130/0x360 [ 82.049958][ T837] netlink_unicast+0x449/0x710 [ 82.050138][ T837] netlink_sendmsg+0x723/0xbe0 [ 82.050316][ T837] ____sys_sendmsg+0x7b2/0xa10 [ 82.050500][ T837] ___sys_sendmsg+0xee/0x170 [ 82.050677][ T837] __sys_sendmsg+0xcd/0x170 [ 82.050854][ T837] do_syscall_64+0xc6/0x1e0 [ 82.051026][ T837] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.051235][ T837] HARDIRQ-ON-R at: [ 82.051342][ T837] __lock_acquire+0x797/0x1570 [ 82.051516][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.051694][ T837] _raw_read_lock_bh+0x44/0x80 [ 82.051869][ T837] inet6_fill_ifla6_attrs+0x516/0x740 [ 82.052041][ T837] inet6_fill_link_af+0x5e/0xe0 [ 82.052217][ T837] rtnl_fill_ifinfo+0x1615/0x2a90 [ 82.052391][ T837] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 82.052596][ T837] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 82.052813][ T837] rtmsg_ifinfo+0x5b/0xa0 [ 82.052988][ T837] register_netdevice+0x1177/0x1690 [ 82.053171][ T837] register_netdev+0x20/0x40 [ 82.053343][ T837] vti6_init_net+0x25d/0x380 [ 82.053524][ T837] ops_init+0x9b/0x560 [ 82.053664][ T837] register_pernet_operations+0x2db/0x710 [ 82.053876][ T837] register_pernet_device+0x2a/0x60 [ 82.054048][ T837] vti6_tunnel_init+0x18/0x110 [ 82.054223][ T837] do_one_initcall+0x8d/0x1e0 [ 82.054399][ T837] do_initcalls+0x1b2/0x3e0 [ 82.054585][ T837] kernel_init_freeable+0x232/0x310 [ 82.054753][ T837] kernel_init+0x20/0x200 [ 82.055086][ T837] ret_from_fork+0x31/0x70 [ 82.055257][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.055427][ T837] IN-SOFTIRQ-W at: [ 82.055528][ T837] __lock_acquire+0x797/0x1570 [ 82.055783][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.055952][ T837] _raw_write_lock+0x30/0x40 [ 82.056158][ T837] addrconf_rs_timer+0xa9/0x730 [ 82.056336][ T837] call_timer_fn+0x13b/0x230 [ 82.056522][ T837] __run_timers+0x545/0x810 [ 82.056702][ T837] run_timer_softirq+0xe8/0x1b0 [ 82.056874][ T837] __do_softirq+0x1f8/0x5df [ 82.057136][ T837] irq_exit_rcu+0x97/0xc0 [ 82.057315][ T837] sysvec_apic_timer_interrupt+0x75/0x80 [ 82.057528][ T837] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 82.057827][ T837] default_idle+0xf/0x20 [ 82.058006][ T837] default_idle_call+0x6d/0xb0 [ 82.058183][ T837] cpuidle_idle_call+0x1f4/0x280 [ 82.058357][ T837] do_idle+0xf9/0x160 [ 82.058501][ T837] cpu_startup_entry+0x54/0x60 [ 82.058673][ T837] rest_init+0x14f/0x260 [ 82.058856][ T837] start_kernel+0x318/0x3d0 [ 82.059119][ T837] x86_64_start_reservations+0x18/0x30 [ 82.059300][ T837] x86_64_start_kernel+0xba/0x110 [ 82.059478][ T837] common_startup_64+0x12c/0x138 [ 82.059739][ T837] IN-SOFTIRQ-R at: [ 82.059845][ T837] __lock_acquire+0x797/0x1570 [ 82.060028][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.060204][ T837] _raw_read_lock_bh+0x44/0x80 [ 82.060377][ T837] ipv6_get_lladdr+0xa9/0x3e0 [ 82.060549][ T837] addrconf_rs_timer+0x24a/0x730 [ 82.060728][ T837] call_timer_fn+0x13b/0x230 [ 82.060901][ T837] __run_timers+0x545/0x810 [ 82.061155][ T837] run_timer_softirq+0xe8/0x1b0 [ 82.061333][ T837] __do_softirq+0x1f8/0x5df [ 82.061513][ T837] irq_exit_rcu+0x97/0xc0 [ 82.061786][ T837] sysvec_apic_timer_interrupt+0x75/0x80 [ 82.061993][ T837] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 82.062201][ T837] default_idle+0xf/0x20 [ 82.062378][ T837] default_idle_call+0x6d/0xb0 [ 82.062568][ T837] cpuidle_idle_call+0x1f4/0x280 [ 82.062740][ T837] do_idle+0xf9/0x160 [ 82.062884][ T837] cpu_startup_entry+0x54/0x60 [ 82.063137][ T837] rest_init+0x14f/0x260 [ 82.063314][ T837] start_kernel+0x318/0x3d0 [ 82.063486][ T837] x86_64_start_reservations+0x18/0x30 [ 82.063751][ T837] x86_64_start_kernel+0xba/0x110 [ 82.063935][ T837] common_startup_64+0x12c/0x138 [ 82.064112][ T837] INITIAL USE at: [ 82.064223][ T837] __lock_acquire+0x797/0x1570 [ 82.064396][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.064572][ T837] _raw_write_lock_bh+0x38/0x50 [ 82.064744][ T837] addrconf_permanent_addr+0x6e/0x670 [ 82.065002][ T837] addrconf_notify+0x749/0xd60 [ 82.065174][ T837] notifier_call_chain+0xcd/0x150 [ 82.065347][ T837] __dev_notify_flags+0xe6/0x250 [ 82.065520][ T837] dev_change_flags+0xec/0x160 [ 82.065862][ T837] do_setlink+0x7d6/0x21e0 [ 82.066042][ T837] __rtnl_newlink+0xaa7/0xd80 [ 82.066213][ T837] rtnl_newlink+0x63/0xa0 [ 82.066379][ T837] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 82.066546][ T837] netlink_rcv_skb+0x130/0x360 [ 82.066714][ T837] netlink_unicast+0x449/0x710 [ 82.066962][ T837] netlink_sendmsg+0x723/0xbe0 [ 82.067130][ T837] ____sys_sendmsg+0x7b2/0xa10 [ 82.067298][ T837] ___sys_sendmsg+0xee/0x170 [ 82.067468][ T837] __sys_sendmsg+0xcd/0x170 [ 82.067715][ T837] do_syscall_64+0xc6/0x1e0 [ 82.067882][ T837] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.068083][ T837] INITIAL READ USE at: [ 82.068261][ T837] __lock_acquire+0x797/0x1570 [ 82.068431][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.068600][ T837] _raw_read_lock_bh+0x44/0x80 [ 82.068792][ T837] inet6_fill_ifla6_attrs+0x516/0x740 [ 82.069079][ T837] inet6_fill_link_af+0x5e/0xe0 [ 82.069250][ T837] rtnl_fill_ifinfo+0x1615/0x2a90 [ 82.069423][ T837] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 82.069712][ T837] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 82.069932][ T837] rtmsg_ifinfo+0x5b/0xa0 [ 82.070100][ T837] register_netdevice+0x1177/0x1690 [ 82.070413][ T837] register_netdev+0x20/0x40 [ 82.070596][ T837] vti6_init_net+0x25d/0x380 [ 82.070769][ T837] ops_init+0x9b/0x560 [ 82.071028][ T837] register_pernet_operations+0x2db/0x710 [ 82.071252][ T837] register_pernet_device+0x2a/0x60 [ 82.071463][ T837] vti6_tunnel_init+0x18/0x110 [ 82.071732][ T837] do_one_initcall+0x8d/0x1e0 [ 82.071910][ T837] do_initcalls+0x1b2/0x3e0 [ 82.072095][ T837] kernel_init_freeable+0x232/0x310 [ 82.072311][ T837] kernel_init+0x20/0x200 [ 82.072493][ T837] ret_from_fork+0x31/0x70 [ 82.072698][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.072877][ T837] } [ 82.073030][ T837] ... key at: [] __key.37+0x0/0x40 [ 82.073243][ T837] [ 82.073243][ T837] the dependencies between the lock to be acquired [ 82.073245][ T837] and SOFTIRQ-irq-unsafe lock: [ 82.073706][ T837] -> (&p->alloc_lock){+.+.}-{2:2} { [ 82.073858][ T837] HARDIRQ-ON-W at: [ 82.073966][ T837] __lock_acquire+0x797/0x1570 [ 82.074149][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.074330][ T837] _raw_spin_lock+0x30/0x40 [ 82.074512][ T837] set_mems_allowed+0x1d/0x210 [ 82.074690][ T837] kernel_init_freeable+0x72/0x310 [ 82.074868][ T837] kernel_init+0x20/0x200 [ 82.075124][ T837] ret_from_fork+0x31/0x70 [ 82.075298][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.075474][ T837] SOFTIRQ-ON-W at: [ 82.075578][ T837] __lock_acquire+0x797/0x1570 [ 82.075850][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.076021][ T837] _raw_spin_lock+0x30/0x40 [ 82.076227][ T837] set_mems_allowed+0x1d/0x210 [ 82.076488][ T837] kernel_init_freeable+0x72/0x310 [ 82.076668][ T837] kernel_init+0x20/0x200 [ 82.076843][ T837] ret_from_fork+0x31/0x70 [ 82.077098][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.077277][ T837] INITIAL USE at: [ 82.077381][ T837] __lock_acquire+0x797/0x1570 [ 82.077562][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.077821][ T837] _raw_spin_lock+0x30/0x40 [ 82.078004][ T837] set_mems_allowed+0x1d/0x210 [ 82.078177][ T837] kernel_init_freeable+0x72/0x310 [ 82.078358][ T837] kernel_init+0x20/0x200 [ 82.078614][ T837] ret_from_fork+0x31/0x70 [ 82.078798][ T837] ret_from_fork_asm+0x1a/0x30 [ 82.078975][ T837] } [ 82.079049][ T837] ... key at: [] __key.388+0x0/0x40 [ 82.079339][ T837] ... acquired at: [ 82.079448][ T837] check_prev_add+0x194/0xce0 [ 82.079594][ T837] validate_chain+0x71d/0x9b0 [ 82.079738][ T837] __lock_acquire+0xaf0/0x1570 [ 82.079958][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.080108][ T837] _raw_spin_lock+0x30/0x40 [ 82.080249][ T837] __get_task_comm+0x27/0x70 [ 82.080393][ T837] ref_tracker_alloc+0x2ee/0x490 [ 82.080619][ T837] netdev_get_by_index+0x5e/0x80 [ 82.080758][ T837] fib6_nh_init+0x3d8/0x1580 [ 82.080903][ T837] ip6_route_info_create+0xf18/0x17d0 [ 82.081048][ T837] addrconf_f6i_alloc+0x265/0x560 [ 82.081272][ T837] __ipv6_dev_ac_inc+0x25f/0xb10 [ 82.081416][ T837] addrconf_join_anycast+0x1c0/0x220 [ 82.081559][ T837] dev_forward_change+0x2a6/0x7b0 [ 82.081696][ T837] addrconf_fixup_forwarding+0x23f/0x460 [ 82.081953][ T837] addrconf_sysctl_forward+0x212/0x2b0 [ 82.082095][ T837] proc_sys_call_handler+0x403/0x5e0 [ 82.082244][ T837] vfs_write+0x9e5/0x10a0 [ 82.082382][ T837] ksys_write+0xf5/0x1e0 [ 82.082613][ T837] do_syscall_64+0xc6/0x1e0 [ 82.082751][ T837] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.082925][ T837] [ 82.082995][ T837] [ 82.082995][ T837] stack backtrace: [ 82.083168][ T837] CPU: 3 PID: 837 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 82.083453][ T837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 82.083765][ T837] Call Trace: [ 82.083948][ T837] [ 82.084018][ T837] dump_stack_lvl+0x82/0xd0 [ 82.084164][ T837] print_bad_irq_dependency+0x957/0xd40 [ 82.084298][ T837] ? hlock_class+0x4e/0x130 [ 82.084432][ T837] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 82.084675][ T837] ? __pfx_usage_skip+0x10/0x10 [ 82.084830][ T837] ? __bfs+0x246/0x650 [ 82.084933][ T837] ? __pfx_usage_match+0x10/0x10 [ 82.085069][ T837] check_irq_usage+0x596/0x850 [ 82.085289][ T837] ? __pfx_check_irq_usage+0x10/0x10 [ 82.085429][ T837] ? __bfs+0x246/0x650 [ 82.085533][ T837] ? __pfx_hlock_conflict+0x10/0x10 [ 82.085672][ T837] ? check_path.constprop.0+0x24/0x50 [ 82.085808][ T837] ? check_noncircular+0x14c/0x3e0 [ 82.086031][ T837] ? __pfx_check_noncircular+0x10/0x10 [ 82.086171][ T837] ? check_prev_add+0x194/0xce0 [ 82.086303][ T837] check_prev_add+0x194/0xce0 [ 82.086437][ T837] ? validate_chain+0x130/0x9b0 [ 82.086650][ T837] validate_chain+0x71d/0x9b0 [ 82.086784][ T837] ? mark_lock+0x38/0x3e0 [ 82.086885][ T837] ? __pfx_validate_chain+0x10/0x10 [ 82.087018][ T837] ? hlock_class+0x4e/0x130 [ 82.087158][ T837] ? mark_lock+0x38/0x3e0 [ 82.087416][ T837] __lock_acquire+0xaf0/0x1570 [ 82.087553][ T837] lock_acquire.part.0+0xeb/0x330 [ 82.087720][ T837] ? __get_task_comm+0x27/0x70 [ 82.087862][ T837] ? mark_lock+0x38/0x3e0 [ 82.088048][ T837] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.088198][ T837] ? trace_lock_acquire+0x135/0x1c0 [ 82.088340][ T837] ? __get_task_comm+0x27/0x70 [ 82.088476][ T837] ? lock_acquire+0x32/0xc0 [ 82.088619][ T837] ? __get_task_comm+0x27/0x70 [ 82.088845][ T837] _raw_spin_lock+0x30/0x40 [ 82.088989][ T837] ? __get_task_comm+0x27/0x70 [ 82.089129][ T837] __get_task_comm+0x27/0x70 [ 82.089272][ T837] ref_tracker_alloc+0x2ee/0x490 [ 82.089413][ T837] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 82.089565][ T837] ? dev_get_by_index+0x177/0x270 [ 82.089701][ T837] ? netdev_get_by_index+0x5e/0x80 [ 82.089847][ T837] ? fib6_nh_init+0x3d8/0x1580 [ 82.090066][ T837] ? ip6_route_info_create+0xf18/0x17d0 [ 82.090206][ T837] ? addrconf_f6i_alloc+0x265/0x560 [ 82.090351][ T837] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 82.090495][ T837] ? addrconf_join_anycast+0x1c0/0x220 [ 82.090721][ T837] ? dev_forward_change+0x2a6/0x7b0 [ 82.090859][ T837] ? addrconf_fixup_forwarding+0x23f/0x460 [ 82.091029][ T837] ? addrconf_sysctl_forward+0x212/0x2b0 [ 82.091169][ T837] ? proc_sys_call_handler+0x403/0x5e0 [ 82.091306][ T837] ? vfs_write+0x9e5/0x10a0 [ 82.091446][ T837] ? ksys_write+0xf5/0x1e0 [ 82.091586][ T837] ? do_syscall_64+0xc6/0x1e0 [ 82.091734][ T837] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.091985][ T837] ? dev_get_by_index+0x177/0x270 [ 82.092127][ T837] netdev_get_by_index+0x5e/0x80 [ 82.092266][ T837] fib6_nh_init+0x3d8/0x1580 [ 82.092402][ T837] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 82.092682][ T837] ? __pfx_fib6_nh_init+0x10/0x10 [ 82.092821][ T837] ? kasan_save_track+0x14/0x30 [ 82.092966][ T837] ? __kasan_kmalloc+0x7f/0x90 [ 82.093111][ T837] ? __kmalloc+0x1d7/0x3c0 [ 82.093251][ T837] ? fib6_get_table+0x116/0x290 [ 82.093398][ T837] ip6_route_info_create+0xf18/0x17d0 [ 82.093535][ T837] ? __lock_release+0x103/0x460 [ 82.093678][ T837] ? __pfx_ip6_route_info_create+0x10/0x10 [ 82.093852][ T837] ? addrconf_f6i_alloc+0x12d/0x560 [ 82.094076][ T837] addrconf_f6i_alloc+0x265/0x560 [ 82.094222][ T837] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 82.094364][ T837] ? do_raw_write_lock+0x122/0x3b0 [ 82.094510][ T837] ? __pfx_do_raw_write_lock+0x10/0x10 [ 82.094726][ T837] ? lock_acquire+0x32/0xc0 [ 82.094868][ T837] __ipv6_dev_ac_inc+0x25f/0xb10 [ 82.095011][ T837] addrconf_join_anycast+0x1c0/0x220 [ 82.095155][ T837] ? mark_lock+0x38/0x3e0 [ 82.095259][ T837] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 82.095440][ T837] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 82.095615][ T837] dev_forward_change+0x2a6/0x7b0 [ 82.095757][ T837] ? __pfx_dev_forward_change+0x10/0x10 [ 82.095988][ T837] addrconf_fixup_forwarding+0x23f/0x460 [ 82.096127][ T837] addrconf_sysctl_forward+0x212/0x2b0 [ 82.096266][ T837] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 82.096442][ T837] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 82.096692][ T837] ? trace_kmalloc+0x2a/0xe0 [ 82.096843][ T837] ? __kmalloc_node+0x220/0x400 [ 82.096983][ T837] ? proc_sys_call_handler+0x30b/0x5e0 [ 82.097125][ T837] proc_sys_call_handler+0x403/0x5e0 [ 82.097348][ T837] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 82.097517][ T837] ? __lock_acquire+0xaf0/0x1570 [ 82.097665][ T837] vfs_write+0x9e5/0x10a0 [ 82.097770][ T837] ? do_user_addr_fault+0x449/0xbe0 [ 82.098070][ T837] ? __pfx_vfs_write+0x10/0x10 [ 82.098211][ T837] ? find_held_lock+0x2c/0x110 [ 82.098354][ T837] ? __pfx___lock_release+0x10/0x10 [ 82.098495][ T837] ? __fget_light+0x53/0x1e0 [ 82.098642][ T837] ksys_write+0xf5/0x1e0 [ 82.098833][ T837] ? __pfx_ksys_write+0x10/0x10 [ 82.098977][ T837] ? do_user_addr_fault+0x4bd/0xbe0 [ 82.099119][ T837] do_syscall_64+0xc6/0x1e0 [ 82.099256][ T837] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 82.099425][ T837] RIP: 0033:0x7f86f5f6d957 [ 82.099571][ T837] 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 [ 82.100152][ T837] RSP: 002b:00007ffea11783d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 82.100359][ T837] RAX: ffffffffffffffda RBX: 00005584c5dc9360 RCX: 00007f86f5f6d957 [ 82.100561][ T837] RDX: 0000000000000002 RSI: 00005584c5dc93a0 RDI: 0000000000000005 [ 82.100867][ T837] RBP: 00005584c5dcb4d0 R08: 0000000000000003 R09: 0000000000000077 [ 82.101074][ T837] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 82.101278][ T837] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f86f60249c0 [ 82.101485][ T837] [ 84.325880][ T858] Mirror/redirect action on