[ 31.005749][ T311] gre: GRE over IPv4 demultiplexor driver [ 31.024876][ T311] ip_gre: GRE over IPv4 tunneling driver [ 33.218475][ T333] 8021q: 802.1Q VLAN Support v1.8 [ 33.758142][ T338] ip (338) used greatest stack depth: 23584 bytes left [ 37.441442][ T371] GACT probability NOT on [ 41.118962][ T404] [ 41.119085][ T404] ===================================================== [ 41.119270][ T404] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 41.119507][ T404] 6.9.0-rc1-virtme #1 Not tainted [ 41.119654][ T404] ----------------------------------------------------- [ 41.119830][ T404] sysctl/404 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 41.120032][ T404] ffff8880059dac28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 41.120281][ T404] [ 41.120281][ T404] and this task is already holding: [ 41.120478][ T404] ffff888006b65580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 41.120757][ T404] which would create a new lock dependency: [ 41.120940][ T404] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 41.121164][ T404] [ 41.121164][ T404] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 41.121417][ T404] (&ndev->lock){++--}-{2:2} [ 41.121420][ T404] [ 41.121420][ T404] ... which became SOFTIRQ-irq-safe at: [ 41.121779][ T404] __lock_acquire+0x797/0x1570 [ 41.121940][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.122087][ T404] _raw_write_lock+0x30/0x40 [ 41.122252][ T404] addrconf_rs_timer+0xa9/0x730 [ 41.122401][ T404] call_timer_fn+0x13b/0x230 [ 41.122555][ T404] __run_timers+0x545/0x810 [ 41.122704][ T404] run_timer_softirq+0xe8/0x1b0 [ 41.122852][ T404] __do_softirq+0x1f8/0x5df [ 41.122997][ T404] irq_exit_rcu+0x97/0xc0 [ 41.123144][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.123294][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.123474][ T404] default_idle+0xf/0x20 [ 41.123584][ T404] default_idle_call+0x6d/0xb0 [ 41.123727][ T404] cpuidle_idle_call+0x1f4/0x280 [ 41.123876][ T404] do_idle+0xf9/0x160 [ 41.123984][ T404] cpu_startup_entry+0x54/0x60 [ 41.124131][ T404] start_secondary+0x21c/0x2b0 [ 41.124277][ T404] common_startup_64+0x12c/0x138 [ 41.124424][ T404] [ 41.124424][ T404] to a SOFTIRQ-irq-unsafe lock: [ 41.124612][ T404] (&p->alloc_lock){+.+.}-{2:2} [ 41.124616][ T404] [ 41.124616][ T404] ... which became SOFTIRQ-irq-unsafe at: [ 41.124975][ T404] ... [ 41.124977][ T404] __lock_acquire+0x797/0x1570 [ 41.125206][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.125354][ T404] _raw_spin_lock+0x30/0x40 [ 41.125504][ T404] set_mems_allowed+0x1d/0x210 [ 41.125662][ T404] kernel_init_freeable+0x72/0x310 [ 41.125812][ T404] kernel_init+0x20/0x200 [ 41.125959][ T404] ret_from_fork+0x31/0x70 [ 41.126112][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.126263][ T404] [ 41.126263][ T404] other info that might help us debug this: [ 41.126263][ T404] [ 41.126558][ T404] Possible interrupt unsafe locking scenario: [ 41.126558][ T404] [ 41.126778][ T404] CPU0 CPU1 [ 41.126933][ T404] ---- ---- [ 41.127081][ T404] lock(&p->alloc_lock); [ 41.127194][ T404] local_irq_disable(); [ 41.127377][ T404] lock(&ndev->lock); [ 41.127566][ T404] lock(&p->alloc_lock); [ 41.127751][ T404] [ 41.127866][ T404] lock(&ndev->lock); [ 41.127984][ T404] [ 41.127984][ T404] *** DEADLOCK *** [ 41.127984][ T404] [ 41.128204][ T404] 3 locks held by sysctl/404: [ 41.128351][ T404] #0: ffff888005fe13f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 41.128618][ T404] #1: ffffffff979969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 41.128920][ T404] #2: ffff888006b65580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 41.129190][ T404] [ 41.129190][ T404] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 41.129480][ T404] -> (&ndev->lock){++--}-{2:2} { [ 41.129636][ T404] HARDIRQ-ON-W at: [ 41.129752][ T404] __lock_acquire+0x797/0x1570 [ 41.129942][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.130131][ T404] _raw_write_lock_bh+0x38/0x50 [ 41.130324][ T404] addrconf_permanent_addr+0x6e/0x670 [ 41.130509][ T404] addrconf_notify+0x749/0xd60 [ 41.130695][ T404] notifier_call_chain+0xcd/0x150 [ 41.130885][ T404] __dev_notify_flags+0xe6/0x250 [ 41.131073][ T404] dev_change_flags+0xec/0x160 [ 41.131258][ T404] do_setlink+0x7d6/0x21e0 [ 41.131452][ T404] __rtnl_newlink+0xaa7/0xd80 [ 41.131642][ T404] rtnl_newlink+0x63/0xa0 [ 41.131829][ T404] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 41.132016][ T404] netlink_rcv_skb+0x130/0x360 [ 41.132212][ T404] netlink_unicast+0x449/0x710 [ 41.132413][ T404] netlink_sendmsg+0x723/0xbe0 [ 41.132583][ T404] ____sys_sendmsg+0x7b2/0xa10 [ 41.132769][ T404] ___sys_sendmsg+0xee/0x170 [ 41.132947][ T404] __sys_sendmsg+0xcd/0x170 [ 41.133141][ T404] do_syscall_64+0xc6/0x1e0 [ 41.133317][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.133535][ T404] HARDIRQ-ON-R at: [ 41.133638][ T404] __lock_acquire+0x797/0x1570 [ 41.133811][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.133992][ T404] _raw_read_lock_bh+0x44/0x80 [ 41.134165][ T404] inet6_fill_ifla6_attrs+0x516/0x740 [ 41.134338][ T404] inet6_fill_link_af+0x5e/0xe0 [ 41.134515][ T404] rtnl_fill_ifinfo+0x1612/0x29e0 [ 41.134688][ T404] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 41.134859][ T404] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 41.135070][ T404] rtmsg_ifinfo+0x5b/0xa0 [ 41.135245][ T404] register_netdevice+0x1177/0x1690 [ 41.135418][ T404] register_netdev+0x20/0x40 [ 41.135592][ T404] sit_init_net+0x250/0x4f0 [ 41.135769][ T404] ops_init+0x9b/0x560 [ 41.135910][ T404] register_pernet_operations+0x2db/0x710 [ 41.136119][ T404] register_pernet_device+0x2a/0x60 [ 41.136294][ T404] sit_init+0x23/0xe0 [ 41.136440][ T404] do_one_initcall+0x8d/0x1e0 [ 41.136615][ T404] do_initcalls+0x1b2/0x3e0 [ 41.136786][ T404] kernel_init_freeable+0x232/0x310 [ 41.136968][ T404] kernel_init+0x20/0x200 [ 41.137142][ T404] ret_from_fork+0x31/0x70 [ 41.137318][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.137495][ T404] IN-SOFTIRQ-W at: [ 41.137600][ T404] __lock_acquire+0x797/0x1570 [ 41.137773][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.137950][ T404] _raw_write_lock+0x30/0x40 [ 41.138126][ T404] addrconf_rs_timer+0xa9/0x730 [ 41.138302][ T404] call_timer_fn+0x13b/0x230 [ 41.138503][ T404] __run_timers+0x545/0x810 [ 41.138682][ T404] run_timer_softirq+0xe8/0x1b0 [ 41.138871][ T404] __do_softirq+0x1f8/0x5df [ 41.139060][ T404] irq_exit_rcu+0x97/0xc0 [ 41.139245][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.139472][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.139703][ T404] default_idle+0xf/0x20 [ 41.139891][ T404] default_idle_call+0x6d/0xb0 [ 41.140166][ T404] cpuidle_idle_call+0x1f4/0x280 [ 41.140354][ T404] do_idle+0xf9/0x160 [ 41.140502][ T404] cpu_startup_entry+0x54/0x60 [ 41.140703][ T404] start_secondary+0x21c/0x2b0 [ 41.140994][ T404] common_startup_64+0x12c/0x138 [ 41.141181][ T404] IN-SOFTIRQ-R at: [ 41.141294][ T404] __lock_acquire+0x797/0x1570 [ 41.141483][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.141669][ T404] _raw_read_lock_bh+0x44/0x80 [ 41.141859][ T404] ipv6_get_lladdr+0xa9/0x3e0 [ 41.142046][ T404] addrconf_rs_timer+0x24a/0x730 [ 41.142345][ T404] call_timer_fn+0x13b/0x230 [ 41.142535][ T404] __run_timers+0x545/0x810 [ 41.142721][ T404] run_timer_softirq+0xe8/0x1b0 [ 41.142990][ T404] __do_softirq+0x1f8/0x5df [ 41.143180][ T404] irq_exit_rcu+0x97/0xc0 [ 41.143369][ T404] sysvec_apic_timer_interrupt+0x75/0x80 [ 41.143600][ T404] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 41.143910][ T404] default_idle+0xf/0x20 [ 41.144100][ T404] default_idle_call+0x6d/0xb0 [ 41.144289][ T404] cpuidle_idle_call+0x1f4/0x280 [ 41.144560][ T404] do_idle+0xf9/0x160 [ 41.144712][ T404] cpu_startup_entry+0x54/0x60 [ 41.144903][ T404] start_secondary+0x21c/0x2b0 [ 41.145177][ T404] common_startup_64+0x12c/0x138 [ 41.145366][ T404] INITIAL USE at: [ 41.145478][ T404] __lock_acquire+0x797/0x1570 [ 41.145667][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.145943][ T404] _raw_write_lock_bh+0x38/0x50 [ 41.146129][ T404] addrconf_permanent_addr+0x6e/0x670 [ 41.146321][ T404] addrconf_notify+0x749/0xd60 [ 41.146510][ T404] notifier_call_chain+0xcd/0x150 [ 41.146698][ T404] __dev_notify_flags+0xe6/0x250 [ 41.146889][ T404] dev_change_flags+0xec/0x160 [ 41.147076][ T404] do_setlink+0x7d6/0x21e0 [ 41.147350][ T404] __rtnl_newlink+0xaa7/0xd80 [ 41.147536][ T404] rtnl_newlink+0x63/0xa0 [ 41.147730][ T404] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 41.148076][ T404] netlink_rcv_skb+0x130/0x360 [ 41.148266][ T404] netlink_unicast+0x449/0x710 [ 41.148455][ T404] netlink_sendmsg+0x723/0xbe0 [ 41.148652][ T404] ____sys_sendmsg+0x7b2/0xa10 [ 41.148925][ T404] ___sys_sendmsg+0xee/0x170 [ 41.149113][ T404] __sys_sendmsg+0xcd/0x170 [ 41.149309][ T404] do_syscall_64+0xc6/0x1e0 [ 41.149501][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.149722][ T404] INITIAL READ USE at: [ 41.149835][ T404] __lock_acquire+0x797/0x1570 [ 41.150020][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.150287][ T404] _raw_read_lock_bh+0x44/0x80 [ 41.150474][ T404] inet6_fill_ifla6_attrs+0x516/0x740 [ 41.150697][ T404] inet6_fill_link_af+0x5e/0xe0 [ 41.150969][ T404] rtnl_fill_ifinfo+0x1612/0x29e0 [ 41.151155][ T404] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 41.151373][ T404] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 41.151595][ T404] rtmsg_ifinfo+0x5b/0xa0 [ 41.151786][ T404] register_netdevice+0x1177/0x1690 [ 41.152008][ T404] register_netdev+0x20/0x40 [ 41.152288][ T404] sit_init_net+0x250/0x4f0 [ 41.152480][ T404] ops_init+0x9b/0x560 [ 41.152668][ T404] register_pernet_operations+0x2db/0x710 [ 41.152975][ T404] register_pernet_device+0x2a/0x60 [ 41.153201][ T404] sit_init+0x23/0xe0 [ 41.153388][ T404] do_one_initcall+0x8d/0x1e0 [ 41.153575][ T404] do_initcalls+0x1b2/0x3e0 [ 41.153848][ T404] kernel_init_freeable+0x232/0x310 [ 41.154071][ T404] kernel_init+0x20/0x200 [ 41.154258][ T404] ret_from_fork+0x31/0x70 [ 41.154540][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.154727][ T404] } [ 41.154810][ T404] ... key at: [] __key.37+0x0/0x40 [ 41.155039][ T404] [ 41.155039][ T404] the dependencies between the lock to be acquired [ 41.155041][ T404] and SOFTIRQ-irq-unsafe lock: [ 41.155519][ T404] -> (&p->alloc_lock){+.+.}-{2:2} { [ 41.155681][ T404] HARDIRQ-ON-W at: [ 41.155883][ T404] __lock_acquire+0x797/0x1570 [ 41.156076][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.156263][ T404] _raw_spin_lock+0x30/0x40 [ 41.156452][ T404] set_mems_allowed+0x1d/0x210 [ 41.156640][ T404] kernel_init_freeable+0x72/0x310 [ 41.156829][ T404] kernel_init+0x20/0x200 [ 41.157021][ T404] ret_from_fork+0x31/0x70 [ 41.157298][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.157487][ T404] SOFTIRQ-ON-W at: [ 41.157601][ T404] __lock_acquire+0x797/0x1570 [ 41.157791][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.158063][ T404] _raw_spin_lock+0x30/0x40 [ 41.158251][ T404] set_mems_allowed+0x1d/0x210 [ 41.158444][ T404] kernel_init_freeable+0x72/0x310 [ 41.158714][ T404] kernel_init+0x20/0x200 [ 41.158904][ T404] ret_from_fork+0x31/0x70 [ 41.159094][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.159282][ T404] INITIAL USE at: [ 41.159559][ T404] __lock_acquire+0x797/0x1570 [ 41.159748][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.159944][ T404] _raw_spin_lock+0x30/0x40 [ 41.160131][ T404] set_mems_allowed+0x1d/0x210 [ 41.160401][ T404] kernel_init_freeable+0x72/0x310 [ 41.160592][ T404] kernel_init+0x20/0x200 [ 41.160782][ T404] ret_from_fork+0x31/0x70 [ 41.161055][ T404] ret_from_fork_asm+0x1a/0x30 [ 41.161240][ T404] } [ 41.161320][ T404] ... key at: [] __key.387+0x0/0x40 [ 41.161546][ T404] ... acquired at: [ 41.161738][ T404] check_prev_add+0x194/0xce0 [ 41.161892][ T404] validate_chain+0x71d/0x9b0 [ 41.162040][ T404] __lock_acquire+0xaf0/0x1570 [ 41.162195][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.162428][ T404] _raw_spin_lock+0x30/0x40 [ 41.162580][ T404] __get_task_comm+0x27/0x70 [ 41.162738][ T404] ref_tracker_alloc+0x2ee/0x490 [ 41.162889][ T404] netdev_get_by_index+0x5e/0x80 [ 41.163039][ T404] fib6_nh_init+0x3d8/0x15b0 [ 41.163273][ T404] ip6_route_info_create+0xf18/0x17d0 [ 41.163424][ T404] addrconf_f6i_alloc+0x265/0x560 [ 41.163573][ T404] __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.163726][ T404] addrconf_join_anycast+0x1c0/0x220 [ 41.163965][ T404] dev_forward_change+0x2a6/0x7b0 [ 41.164121][ T404] addrconf_fixup_forwarding+0x23f/0x460 [ 41.164309][ T404] addrconf_sysctl_forward+0x212/0x2b0 [ 41.164456][ T404] proc_sys_call_handler+0x403/0x5e0 [ 41.164609][ T404] vfs_write+0x9e5/0x10a0 [ 41.164757][ T404] ksys_write+0xf5/0x1e0 [ 41.164907][ T404] do_syscall_64+0xc6/0x1e0 [ 41.165058][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.165333][ T404] [ 41.165410][ T404] [ 41.165410][ T404] stack backtrace: [ 41.165596][ T404] CPU: 0 PID: 404 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 41.165821][ T404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.166237][ T404] Call Trace: [ 41.166355][ T404] [ 41.166437][ T404] dump_stack_lvl+0x82/0xd0 [ 41.166593][ T404] print_bad_irq_dependency+0x957/0xd40 [ 41.166835][ T404] ? hlock_class+0x4e/0x130 [ 41.166990][ T404] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 41.167177][ T404] ? __pfx_usage_skip+0x10/0x10 [ 41.167328][ T404] ? __bfs+0x246/0x650 [ 41.167521][ T404] ? __pfx_usage_match+0x10/0x10 [ 41.167672][ T404] check_irq_usage+0x596/0x850 [ 41.167824][ T404] ? __pfx_check_irq_usage+0x10/0x10 [ 41.167976][ T404] ? __bfs+0x246/0x650 [ 41.168172][ T404] ? __pfx_hlock_conflict+0x10/0x10 [ 41.168326][ T404] ? check_path.constprop.0+0x24/0x50 [ 41.168476][ T404] ? check_noncircular+0x14c/0x3e0 [ 41.168630][ T404] ? __pfx_check_noncircular+0x10/0x10 [ 41.168785][ T404] ? check_prev_add+0x194/0xce0 [ 41.169029][ T404] check_prev_add+0x194/0xce0 [ 41.169178][ T404] ? validate_chain+0x130/0x9b0 [ 41.169330][ T404] validate_chain+0x71d/0x9b0 [ 41.169484][ T404] ? mark_lock+0x38/0x3e0 [ 41.169597][ T404] ? __pfx_validate_chain+0x10/0x10 [ 41.169744][ T404] ? hlock_class+0x4e/0x130 [ 41.169893][ T404] ? mark_lock+0x38/0x3e0 [ 41.170006][ T404] __lock_acquire+0xaf0/0x1570 [ 41.170154][ T404] lock_acquire.part.0+0xeb/0x330 [ 41.170381][ T404] ? __get_task_comm+0x27/0x70 [ 41.170527][ T404] ? mark_lock+0x38/0x3e0 [ 41.170637][ T404] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.170786][ T404] ? trace_lock_acquire+0x135/0x1c0 [ 41.171095][ T404] ? __get_task_comm+0x27/0x70 [ 41.171239][ T404] ? lock_acquire+0x32/0xc0 [ 41.171387][ T404] ? __get_task_comm+0x27/0x70 [ 41.171534][ T404] _raw_spin_lock+0x30/0x40 [ 41.171763][ T404] ? __get_task_comm+0x27/0x70 [ 41.171908][ T404] __get_task_comm+0x27/0x70 [ 41.172061][ T404] ref_tracker_alloc+0x2ee/0x490 [ 41.172268][ T404] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 41.172469][ T404] ? dev_get_by_index+0x177/0x270 [ 41.172687][ T404] ? netdev_get_by_index+0x5e/0x80 [ 41.172822][ T404] ? fib6_nh_init+0x3d8/0x15b0 [ 41.172955][ T404] ? ip6_route_info_create+0xf18/0x17d0 [ 41.173090][ T404] ? addrconf_f6i_alloc+0x265/0x560 [ 41.173306][ T404] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.173441][ T404] ? addrconf_join_anycast+0x1c0/0x220 [ 41.173579][ T404] ? dev_forward_change+0x2a6/0x7b0 [ 41.173712][ T404] ? addrconf_fixup_forwarding+0x23f/0x460 [ 41.173964][ T404] ? addrconf_sysctl_forward+0x212/0x2b0 [ 41.174098][ T404] ? proc_sys_call_handler+0x403/0x5e0 [ 41.174235][ T404] ? vfs_write+0x9e5/0x10a0 [ 41.174368][ T404] ? ksys_write+0xf5/0x1e0 [ 41.174502][ T404] ? do_syscall_64+0xc6/0x1e0 [ 41.174636][ T404] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.174805][ T404] ? dev_get_by_index+0x177/0x270 [ 41.174940][ T404] netdev_get_by_index+0x5e/0x80 [ 41.175157][ T404] fib6_nh_init+0x3d8/0x15b0 [ 41.175291][ T404] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 41.175462][ T404] ? __pfx_fib6_nh_init+0x10/0x10 [ 41.175599][ T404] ? kasan_save_track+0x14/0x30 [ 41.175819][ T404] ? __kasan_kmalloc+0x7f/0x90 [ 41.175958][ T404] ? __kmalloc+0x1d7/0x3c0 [ 41.176099][ T404] ? fib6_get_table+0x116/0x290 [ 41.176236][ T404] ip6_route_info_create+0xf18/0x17d0 [ 41.176453][ T404] ? __lock_release+0x103/0x460 [ 41.176591][ T404] ? __pfx_ip6_route_info_create+0x10/0x10 [ 41.176759][ T404] ? addrconf_f6i_alloc+0x12d/0x560 [ 41.176897][ T404] addrconf_f6i_alloc+0x265/0x560 [ 41.177117][ T404] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 41.177257][ T404] ? do_raw_write_lock+0x122/0x3b0 [ 41.177397][ T404] ? __pfx_do_raw_write_lock+0x10/0x10 [ 41.177532][ T404] ? lock_acquire+0x32/0xc0 [ 41.177669][ T404] __ipv6_dev_ac_inc+0x25f/0xb10 [ 41.177887][ T404] addrconf_join_anycast+0x1c0/0x220 [ 41.178026][ T404] ? mark_lock+0x38/0x3e0 [ 41.178129][ T404] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 41.178297][ T404] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 41.178548][ T404] dev_forward_change+0x2a6/0x7b0 [ 41.178688][ T404] ? __pfx_dev_forward_change+0x10/0x10 [ 41.178829][ T404] addrconf_fixup_forwarding+0x23f/0x460 [ 41.178968][ T404] addrconf_sysctl_forward+0x212/0x2b0 [ 41.179189][ T404] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 41.179358][ T404] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 41.179527][ T404] ? trace_kmalloc+0x2a/0xe0 [ 41.179662][ T404] ? __kmalloc_node+0x220/0x400 [ 41.179886][ T404] ? proc_sys_call_handler+0x30b/0x5e0 [ 41.180024][ T404] proc_sys_call_handler+0x403/0x5e0 [ 41.180160][ T404] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 41.180331][ T404] ? __lock_acquire+0xaf0/0x1570 [ 41.180558][ T404] vfs_write+0x9e5/0x10a0 [ 41.180660][ T404] ? do_user_addr_fault+0x449/0xbe0 [ 41.180797][ T404] ? __pfx_vfs_write+0x10/0x10 [ 41.180939][ T404] ? find_held_lock+0x2c/0x110 [ 41.181159][ T404] ? __pfx___lock_release+0x10/0x10 [ 41.181297][ T404] ? __fget_light+0x53/0x1e0 [ 41.181435][ T404] ksys_write+0xf5/0x1e0 [ 41.181541][ T404] ? __pfx_ksys_write+0x10/0x10 [ 41.181675][ T404] ? do_user_addr_fault+0x4bd/0xbe0 [ 41.181985][ T404] do_syscall_64+0xc6/0x1e0 [ 41.182120][ T404] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 41.182308][ T404] RIP: 0033:0x7f36a3a23957 [ 41.182456][ T404] 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 [ 41.182948][ T404] RSP: 002b:00007ffffc0d7138 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.183240][ T404] RAX: ffffffffffffffda RBX: 000055737acea360 RCX: 00007f36a3a23957 [ 41.183445][ T404] RDX: 0000000000000002 RSI: 000055737acea3a0 RDI: 0000000000000005 [ 41.183654][ T404] RBP: 000055737acec4d0 R08: 0000000000000003 R09: 0000000000000077 [ 41.183950][ T404] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 41.184154][ T404] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f36a3ada9c0 [ 41.184366][ T404]