[ 38.103641][ T345] [ 38.103768][ T345] ===================================================== [ 38.103944][ T345] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 38.104159][ T345] 6.9.0-rc1-virtme #1 Not tainted [ 38.104300][ T345] ----------------------------------------------------- [ 38.104470][ T345] sysctl/345 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 38.104686][ T345] ffff888007720968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 38.104959][ T345] [ 38.104959][ T345] and this task is already holding: [ 38.105173][ T345] ffff888007922580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 38.105424][ T345] which would create a new lock dependency: [ 38.105597][ T345] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 38.105818][ T345] [ 38.105818][ T345] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 38.106061][ T345] (&ndev->lock){++--}-{2:2} [ 38.106065][ T345] [ 38.106065][ T345] ... which became SOFTIRQ-irq-safe at: [ 38.106404][ T345] __lock_acquire+0x797/0x1570 [ 38.106556][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.106694][ T345] _raw_write_lock+0x30/0x40 [ 38.106851][ T345] addrconf_rs_timer+0xa9/0x730 [ 38.106993][ T345] call_timer_fn+0x13b/0x230 [ 38.107140][ T345] __run_timers+0x545/0x810 [ 38.107284][ T345] run_timer_softirq+0xe8/0x1b0 [ 38.107421][ T345] __do_softirq+0x1f8/0x5df [ 38.107564][ T345] irq_exit_rcu+0x97/0xc0 [ 38.107707][ T345] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.107843][ T345] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.108029][ T345] default_idle+0xf/0x20 [ 38.108138][ T345] default_idle_call+0x6d/0xb0 [ 38.108301][ T345] cpuidle_idle_call+0x1f4/0x280 [ 38.108482][ T345] do_idle+0xf9/0x160 [ 38.108589][ T345] cpu_startup_entry+0x54/0x60 [ 38.108734][ T345] rest_init+0x14f/0x260 [ 38.108853][ T345] start_kernel+0x318/0x3d0 [ 38.109004][ T345] x86_64_start_reservations+0x18/0x30 [ 38.109150][ T345] x86_64_start_kernel+0xba/0x110 [ 38.109293][ T345] common_startup_64+0x12c/0x138 [ 38.109435][ T345] [ 38.109435][ T345] to a SOFTIRQ-irq-unsafe lock: [ 38.109608][ T345] (&p->alloc_lock){+.+.}-{2:2} [ 38.109613][ T345] [ 38.109613][ T345] ... which became SOFTIRQ-irq-unsafe at: [ 38.109952][ T345] ... [ 38.109954][ T345] __lock_acquire+0x797/0x1570 [ 38.110176][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.110318][ T345] _raw_spin_lock+0x30/0x40 [ 38.110463][ T345] set_mems_allowed+0x1d/0x210 [ 38.110607][ T345] kernel_init_freeable+0x72/0x310 [ 38.110756][ T345] kernel_init+0x20/0x200 [ 38.110902][ T345] ret_from_fork+0x31/0x70 [ 38.111045][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.111187][ T345] [ 38.111187][ T345] other info that might help us debug this: [ 38.111187][ T345] [ 38.111453][ T345] Possible interrupt unsafe locking scenario: [ 38.111453][ T345] [ 38.111682][ T345] CPU0 CPU1 [ 38.111833][ T345] ---- ---- [ 38.111986][ T345] lock(&p->alloc_lock); [ 38.112095][ T345] local_irq_disable(); [ 38.112269][ T345] lock(&ndev->lock); [ 38.112454][ T345] lock(&p->alloc_lock); [ 38.112644][ T345] [ 38.112749][ T345] lock(&ndev->lock); [ 38.112867][ T345] [ 38.112867][ T345] *** DEADLOCK *** [ 38.112867][ T345] [ 38.113075][ T345] 3 locks held by sysctl/345: [ 38.113221][ T345] #0: ffff8880124e93f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 38.113485][ T345] #1: ffffffffa75969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 38.113773][ T345] #2: ffff888007922580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 38.114032][ T345] [ 38.114032][ T345] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 38.114314][ T345] -> (&ndev->lock){++--}-{2:2} { [ 38.114464][ T345] HARDIRQ-ON-W at: [ 38.114582][ T345] __lock_acquire+0x797/0x1570 [ 38.114765][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.114940][ T345] _raw_write_lock_bh+0x38/0x50 [ 38.115132][ T345] addrconf_permanent_addr+0x6e/0x670 [ 38.115308][ T345] addrconf_notify+0x749/0xd60 [ 38.115486][ T345] notifier_call_chain+0xcd/0x150 [ 38.115673][ T345] __dev_notify_flags+0xe6/0x250 [ 38.115851][ T345] dev_change_flags+0xec/0x160 [ 38.116058][ T345] do_setlink+0x7d6/0x21e0 [ 38.116238][ T345] __rtnl_newlink+0xaa7/0xd80 [ 38.116425][ T345] rtnl_newlink+0x63/0xa0 [ 38.116598][ T345] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 38.116778][ T345] netlink_rcv_skb+0x130/0x360 [ 38.116962][ T345] netlink_unicast+0x449/0x710 [ 38.117140][ T345] netlink_sendmsg+0x723/0xbe0 [ 38.117322][ T345] ____sys_sendmsg+0x7b2/0xa10 [ 38.117508][ T345] ___sys_sendmsg+0xee/0x170 [ 38.117697][ T345] __sys_sendmsg+0xcd/0x170 [ 38.117873][ T345] do_syscall_64+0xc6/0x1e0 [ 38.118055][ T345] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.118273][ T345] HARDIRQ-ON-R at: [ 38.118382][ T345] __lock_acquire+0x797/0x1570 [ 38.118573][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.118765][ T345] _raw_read_lock_bh+0x44/0x80 [ 38.118943][ T345] inet6_fill_ifla6_attrs+0x516/0x740 [ 38.119120][ T345] inet6_fill_link_af+0x5e/0xe0 [ 38.119297][ T345] rtnl_fill_ifinfo+0x1612/0x29e0 [ 38.119472][ T345] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 38.119648][ T345] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 38.119874][ T345] rtmsg_ifinfo+0x5b/0xa0 [ 38.120056][ T345] register_netdevice+0x1177/0x1690 [ 38.120232][ T345] register_netdev+0x20/0x40 [ 38.120409][ T345] sit_init_net+0x250/0x4f0 [ 38.120594][ T345] ops_init+0x9b/0x560 [ 38.120734][ T345] register_pernet_operations+0x2db/0x710 [ 38.120965][ T345] register_pernet_device+0x2a/0x60 [ 38.121144][ T345] sit_init+0x23/0xe0 [ 38.121287][ T345] do_one_initcall+0x8d/0x1e0 [ 38.121462][ T345] do_initcalls+0x1b2/0x3e0 [ 38.121653][ T345] kernel_init_freeable+0x232/0x310 [ 38.121834][ T345] kernel_init+0x20/0x200 [ 38.122016][ T345] ret_from_fork+0x31/0x70 [ 38.122205][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.122382][ T345] IN-SOFTIRQ-W at: [ 38.122492][ T345] __lock_acquire+0x797/0x1570 [ 38.122666][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.122856][ T345] _raw_write_lock+0x30/0x40 [ 38.123038][ T345] addrconf_rs_timer+0xa9/0x730 [ 38.123219][ T345] call_timer_fn+0x13b/0x230 [ 38.123408][ T345] __run_timers+0x545/0x810 [ 38.123590][ T345] run_timer_softirq+0xe8/0x1b0 [ 38.123767][ T345] __do_softirq+0x1f8/0x5df [ 38.123949][ T345] irq_exit_rcu+0x97/0xc0 [ 38.124125][ T345] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.124339][ T345] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.124554][ T345] default_idle+0xf/0x20 [ 38.124729][ T345] default_idle_call+0x6d/0xb0 [ 38.124908][ T345] cpuidle_idle_call+0x1f4/0x280 [ 38.125091][ T345] do_idle+0xf9/0x160 [ 38.125233][ T345] cpu_startup_entry+0x54/0x60 [ 38.125408][ T345] rest_init+0x14f/0x260 [ 38.125584][ T345] start_kernel+0x318/0x3d0 [ 38.125764][ T345] x86_64_start_reservations+0x18/0x30 [ 38.125943][ T345] x86_64_start_kernel+0xba/0x110 [ 38.126126][ T345] common_startup_64+0x12c/0x138 [ 38.126302][ T345] IN-SOFTIRQ-R at: [ 38.126406][ T345] __lock_acquire+0x797/0x1570 [ 38.126596][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.126794][ T345] _raw_read_lock_bh+0x44/0x80 [ 38.126985][ T345] ipv6_get_lladdr+0xa9/0x3e0 [ 38.127185][ T345] addrconf_rs_timer+0x24a/0x730 [ 38.127378][ T345] call_timer_fn+0x13b/0x230 [ 38.127576][ T345] __run_timers+0x545/0x810 [ 38.127764][ T345] run_timer_softirq+0xe8/0x1b0 [ 38.127964][ T345] __do_softirq+0x1f8/0x5df [ 38.128153][ T345] irq_exit_rcu+0x97/0xc0 [ 38.128346][ T345] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.128570][ T345] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.128802][ T345] default_idle+0xf/0x20 [ 38.128989][ T345] default_idle_call+0x6d/0xb0 [ 38.129183][ T345] cpuidle_idle_call+0x1f4/0x280 [ 38.129382][ T345] do_idle+0xf9/0x160 [ 38.129532][ T345] cpu_startup_entry+0x54/0x60 [ 38.129722][ T345] rest_init+0x14f/0x260 [ 38.129913][ T345] start_kernel+0x318/0x3d0 [ 38.130107][ T345] x86_64_start_reservations+0x18/0x30 [ 38.130297][ T345] x86_64_start_kernel+0xba/0x110 [ 38.130514][ T345] common_startup_64+0x12c/0x138 [ 38.130718][ T345] INITIAL USE at: [ 38.130835][ T345] __lock_acquire+0x797/0x1570 [ 38.131025][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.131214][ T345] _raw_write_lock_bh+0x38/0x50 [ 38.131409][ T345] addrconf_permanent_addr+0x6e/0x670 [ 38.131599][ T345] addrconf_notify+0x749/0xd60 [ 38.131831][ T345] notifier_call_chain+0xcd/0x150 [ 38.132025][ T345] __dev_notify_flags+0xe6/0x250 [ 38.132213][ T345] dev_change_flags+0xec/0x160 [ 38.132417][ T345] do_setlink+0x7d6/0x21e0 [ 38.132615][ T345] __rtnl_newlink+0xaa7/0xd80 [ 38.132817][ T345] rtnl_newlink+0x63/0xa0 [ 38.133010][ T345] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 38.133197][ T345] netlink_rcv_skb+0x130/0x360 [ 38.133391][ T345] netlink_unicast+0x449/0x710 [ 38.133588][ T345] netlink_sendmsg+0x723/0xbe0 [ 38.133779][ T345] ____sys_sendmsg+0x7b2/0xa10 [ 38.133985][ T345] ___sys_sendmsg+0xee/0x170 [ 38.134272][ T345] __sys_sendmsg+0xcd/0x170 [ 38.134464][ T345] do_syscall_64+0xc6/0x1e0 [ 38.134659][ T345] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.134972][ T345] INITIAL READ USE at: [ 38.135088][ T345] __lock_acquire+0x797/0x1570 [ 38.135275][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.135464][ T345] _raw_read_lock_bh+0x44/0x80 [ 38.135745][ T345] inet6_fill_ifla6_attrs+0x516/0x740 [ 38.135972][ T345] inet6_fill_link_af+0x5e/0xe0 [ 38.136168][ T345] rtnl_fill_ifinfo+0x1612/0x29e0 [ 38.136440][ T345] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 38.136664][ T345] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 38.136887][ T345] rtmsg_ifinfo+0x5b/0xa0 [ 38.137162][ T345] register_netdevice+0x1177/0x1690 [ 38.137393][ T345] register_netdev+0x20/0x40 [ 38.137577][ T345] sit_init_net+0x250/0x4f0 [ 38.137849][ T345] ops_init+0x9b/0x560 [ 38.138037][ T345] register_pernet_operations+0x2db/0x710 [ 38.138266][ T345] register_pernet_device+0x2a/0x60 [ 38.138596][ T345] sit_init+0x23/0xe0 [ 38.138788][ T345] do_one_initcall+0x8d/0x1e0 [ 38.138985][ T345] do_initcalls+0x1b2/0x3e0 [ 38.139178][ T345] kernel_init_freeable+0x232/0x310 [ 38.139498][ T345] kernel_init+0x20/0x200 [ 38.139690][ T345] ret_from_fork+0x31/0x70 [ 38.139890][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.140169][ T345] } [ 38.140262][ T345] ... key at: [] __key.37+0x0/0x40 [ 38.140492][ T345] [ 38.140492][ T345] the dependencies between the lock to be acquired [ 38.140493][ T345] and SOFTIRQ-irq-unsafe lock: [ 38.140904][ T345] -> (&p->alloc_lock){+.+.}-{2:2} { [ 38.141069][ T345] HARDIRQ-ON-W at: [ 38.141189][ T345] __lock_acquire+0x797/0x1570 [ 38.141470][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.141690][ T345] _raw_spin_lock+0x30/0x40 [ 38.141882][ T345] set_mems_allowed+0x1d/0x210 [ 38.142080][ T345] kernel_init_freeable+0x72/0x310 [ 38.142355][ T345] kernel_init+0x20/0x200 [ 38.142548][ T345] ret_from_fork+0x31/0x70 [ 38.142740][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.143113][ T345] SOFTIRQ-ON-W at: [ 38.143233][ T345] __lock_acquire+0x797/0x1570 [ 38.143431][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.143626][ T345] _raw_spin_lock+0x30/0x40 [ 38.143817][ T345] set_mems_allowed+0x1d/0x210 [ 38.144011][ T345] kernel_init_freeable+0x72/0x310 [ 38.144204][ T345] kernel_init+0x20/0x200 [ 38.144398][ T345] ret_from_fork+0x31/0x70 [ 38.144574][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.144751][ T345] INITIAL USE at: [ 38.144859][ T345] __lock_acquire+0x797/0x1570 [ 38.145128][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.145319][ T345] _raw_spin_lock+0x30/0x40 [ 38.145494][ T345] set_mems_allowed+0x1d/0x210 [ 38.145678][ T345] kernel_init_freeable+0x72/0x310 [ 38.145943][ T345] kernel_init+0x20/0x200 [ 38.146124][ T345] ret_from_fork+0x31/0x70 [ 38.146303][ T345] ret_from_fork_asm+0x1a/0x30 [ 38.146561][ T345] } [ 38.146638][ T345] ... key at: [] __key.387+0x0/0x40 [ 38.146852][ T345] ... acquired at: [ 38.146960][ T345] check_prev_add+0x194/0xce0 [ 38.147189][ T345] validate_chain+0x71d/0x9b0 [ 38.147339][ T345] __lock_acquire+0xaf0/0x1570 [ 38.147484][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.147622][ T345] _raw_spin_lock+0x30/0x40 [ 38.147762][ T345] __get_task_comm+0x27/0x70 [ 38.147999][ T345] ref_tracker_alloc+0x2ee/0x490 [ 38.148149][ T345] netdev_get_by_index+0x5e/0x80 [ 38.148289][ T345] fib6_nh_init+0x3d8/0x15b0 [ 38.148434][ T345] ip6_route_info_create+0xf18/0x17d0 [ 38.148654][ T345] addrconf_f6i_alloc+0x265/0x560 [ 38.148798][ T345] __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.148942][ T345] addrconf_join_anycast+0x1c0/0x220 [ 38.149096][ T345] dev_forward_change+0x2a6/0x7b0 [ 38.149334][ T345] addrconf_fixup_forwarding+0x23f/0x460 [ 38.149509][ T345] addrconf_sysctl_forward+0x212/0x2b0 [ 38.149648][ T345] proc_sys_call_handler+0x403/0x5e0 [ 38.149799][ T345] vfs_write+0x9e5/0x10a0 [ 38.150040][ T345] ksys_write+0xf5/0x1e0 [ 38.150180][ T345] do_syscall_64+0xc6/0x1e0 [ 38.150321][ T345] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.150495][ T345] [ 38.150576][ T345] [ 38.150576][ T345] stack backtrace: [ 38.150755][ T345] CPU: 0 PID: 345 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 38.150969][ T345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 38.151285][ T345] Call Trace: [ 38.151394][ T345] [ 38.151467][ T345] dump_stack_lvl+0x82/0xd0 [ 38.151680][ T345] print_bad_irq_dependency+0x957/0xd40 [ 38.151918][ T345] ? hlock_class+0x4e/0x130 [ 38.152156][ T345] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 38.152344][ T345] ? __pfx_usage_skip+0x10/0x10 [ 38.152497][ T345] ? __bfs+0x246/0x650 [ 38.152612][ T345] ? __pfx_usage_match+0x10/0x10 [ 38.152847][ T345] check_irq_usage+0x596/0x850 [ 38.153001][ T345] ? __pfx_check_irq_usage+0x10/0x10 [ 38.153154][ T345] ? __bfs+0x246/0x650 [ 38.153271][ T345] ? __pfx_hlock_conflict+0x10/0x10 [ 38.153425][ T345] ? check_path.constprop.0+0x24/0x50 [ 38.153661][ T345] ? check_noncircular+0x14c/0x3e0 [ 38.153816][ T345] ? __pfx_check_noncircular+0x10/0x10 [ 38.153970][ T345] ? check_prev_add+0x194/0xce0 [ 38.154149][ T345] check_prev_add+0x194/0xce0 [ 38.154463][ T345] ? validate_chain+0x130/0x9b0 [ 38.154616][ T345] validate_chain+0x71d/0x9b0 [ 38.154778][ T345] ? mark_lock+0x38/0x3e0 [ 38.154892][ T345] ? __pfx_validate_chain+0x10/0x10 [ 38.155123][ T345] ? hlock_class+0x4e/0x130 [ 38.155279][ T345] ? mark_lock+0x38/0x3e0 [ 38.155404][ T345] __lock_acquire+0xaf0/0x1570 [ 38.155567][ T345] lock_acquire.part.0+0xeb/0x330 [ 38.155721][ T345] ? __get_task_comm+0x27/0x70 [ 38.155958][ T345] ? mark_lock+0x38/0x3e0 [ 38.156075][ T345] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 38.156231][ T345] ? trace_lock_acquire+0x135/0x1c0 [ 38.156413][ T345] ? __get_task_comm+0x27/0x70 [ 38.156649][ T345] ? lock_acquire+0x32/0xc0 [ 38.156802][ T345] ? __get_task_comm+0x27/0x70 [ 38.156954][ T345] _raw_spin_lock+0x30/0x40 [ 38.157135][ T345] ? __get_task_comm+0x27/0x70 [ 38.157292][ T345] __get_task_comm+0x27/0x70 [ 38.157525][ T345] ref_tracker_alloc+0x2ee/0x490 [ 38.157681][ T345] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 38.157837][ T345] ? dev_get_by_index+0x177/0x270 [ 38.157991][ T345] ? netdev_get_by_index+0x5e/0x80 [ 38.158224][ T345] ? fib6_nh_init+0x3d8/0x15b0 [ 38.158383][ T345] ? ip6_route_info_create+0xf18/0x17d0 [ 38.158549][ T345] ? addrconf_f6i_alloc+0x265/0x560 [ 38.158700][ T345] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.158937][ T345] ? addrconf_join_anycast+0x1c0/0x220 [ 38.159099][ T345] ? dev_forward_change+0x2a6/0x7b0 [ 38.159245][ T345] ? addrconf_fixup_forwarding+0x23f/0x460 [ 38.159433][ T345] ? addrconf_sysctl_forward+0x212/0x2b0 [ 38.159668][ T345] ? proc_sys_call_handler+0x403/0x5e0 [ 38.159831][ T345] ? vfs_write+0x9e5/0x10a0 [ 38.159988][ T345] ? ksys_write+0xf5/0x1e0 [ 38.160141][ T345] ? do_syscall_64+0xc6/0x1e0 [ 38.160381][ T345] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.160579][ T345] ? dev_get_by_index+0x177/0x270 [ 38.160737][ T345] netdev_get_by_index+0x5e/0x80 [ 38.160892][ T345] fib6_nh_init+0x3d8/0x15b0 [ 38.161138][ T345] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 38.161330][ T345] ? __pfx_fib6_nh_init+0x10/0x10 [ 38.161480][ T345] ? kasan_save_track+0x14/0x30 [ 38.161650][ T345] ? __kasan_kmalloc+0x7f/0x90 [ 38.161802][ T345] ? __kmalloc+0x1d7/0x3c0 [ 38.161953][ T345] ? fib6_get_table+0x116/0x290 [ 38.162110][ T345] ip6_route_info_create+0xf18/0x17d0 [ 38.162259][ T345] ? __lock_release+0x103/0x460 [ 38.162416][ T345] ? __pfx_ip6_route_info_create+0x10/0x10 [ 38.162680][ T345] ? addrconf_f6i_alloc+0x12d/0x560 [ 38.162827][ T345] addrconf_f6i_alloc+0x265/0x560 [ 38.162976][ T345] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 38.163126][ T345] ? do_raw_write_lock+0x122/0x3b0 [ 38.163357][ T345] ? __pfx_do_raw_write_lock+0x10/0x10 [ 38.163505][ T345] ? lock_acquire+0x32/0xc0 [ 38.163655][ T345] __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.163804][ T345] addrconf_join_anycast+0x1c0/0x220 [ 38.164034][ T345] ? mark_lock+0x38/0x3e0 [ 38.164145][ T345] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 38.164327][ T345] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 38.164512][ T345] dev_forward_change+0x2a6/0x7b0 [ 38.164663][ T345] ? __pfx_dev_forward_change+0x10/0x10 [ 38.164811][ T345] addrconf_fixup_forwarding+0x23f/0x460 [ 38.164959][ T345] addrconf_sysctl_forward+0x212/0x2b0 [ 38.165105][ T345] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 38.165289][ T345] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 38.165474][ T345] ? trace_kmalloc+0x2a/0xe0 [ 38.165619][ T345] ? __kmalloc_node+0x220/0x400 [ 38.165766][ T345] ? proc_sys_call_handler+0x30b/0x5e0 [ 38.166092][ T345] proc_sys_call_handler+0x403/0x5e0 [ 38.166238][ T345] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 38.166420][ T345] ? __lock_acquire+0xaf0/0x1570 [ 38.166573][ T345] vfs_write+0x9e5/0x10a0 [ 38.166685][ T345] ? do_user_addr_fault+0x449/0xbe0 [ 38.166832][ T345] ? __pfx_vfs_write+0x10/0x10 [ 38.166980][ T345] ? find_held_lock+0x2c/0x110 [ 38.167127][ T345] ? __pfx___lock_release+0x10/0x10 [ 38.167276][ T345] ? __fget_light+0x53/0x1e0 [ 38.167430][ T345] ksys_write+0xf5/0x1e0 [ 38.167543][ T345] ? __pfx_ksys_write+0x10/0x10 [ 38.167688][ T345] ? do_user_addr_fault+0x4bd/0xbe0 [ 38.167834][ T345] do_syscall_64+0xc6/0x1e0 [ 38.168079][ T345] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.168263][ T345] RIP: 0033:0x7f9931673957 [ 38.168424][ T345] 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 [ 38.168965][ T345] RSP: 002b:00007fff7a7f3468 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 38.169187][ T345] RAX: ffffffffffffffda RBX: 00005610f8432360 RCX: 00007f9931673957 [ 38.169407][ T345] RDX: 0000000000000002 RSI: 00005610f84323a0 RDI: 0000000000000005 [ 38.169631][ T345] RBP: 00005610f84344d0 R08: 0000000000000003 R09: 0000000000000077 [ 38.169848][ T345] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 38.170163][ T345] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f993172a9c0 [ 38.170390][ T345] [ 38.185188][ T345] sysctl (345) used greatest stack depth: 24056 bytes left WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr