[ 33.979904][ T313] gre: GRE over IPv4 demultiplexor driver [ 33.994864][ T313] ip_gre: GRE over IPv4 tunneling driver [ 36.225736][ T335] 8021q: 802.1Q VLAN Support v1.8 [ 40.394277][ T373] GACT probability NOT on [ 44.071169][ T406] [ 44.071290][ T406] ===================================================== [ 44.071474][ T406] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 44.071699][ T406] 6.9.0-rc1-virtme #1 Not tainted [ 44.071846][ T406] ----------------------------------------------------- [ 44.072032][ T406] sysctl/406 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 44.072268][ T406] ffff88800605cee8 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 44.072541][ T406] [ 44.072541][ T406] and this task is already holding: [ 44.072761][ T406] ffff88800729d580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 44.073028][ T406] which would create a new lock dependency: [ 44.073214][ T406] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 44.073442][ T406] [ 44.073442][ T406] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 44.073697][ T406] (&ndev->lock){++--}-{2:2} [ 44.073701][ T406] [ 44.073701][ T406] ... which became SOFTIRQ-irq-safe at: [ 44.074064][ T406] __lock_acquire+0x797/0x1570 [ 44.074218][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.074367][ T406] _raw_write_lock+0x30/0x40 [ 44.074519][ T406] addrconf_rs_timer+0xa9/0x730 [ 44.074681][ T406] call_timer_fn+0x13b/0x230 [ 44.074836][ T406] __run_timers+0x545/0x810 [ 44.074984][ T406] run_timer_softirq+0xe8/0x1b0 [ 44.075132][ T406] __do_softirq+0x1f8/0x5df [ 44.075280][ T406] irq_exit_rcu+0x97/0xc0 [ 44.075434][ T406] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.075580][ T406] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.075766][ T406] default_idle+0xf/0x20 [ 44.075877][ T406] default_idle_call+0x6d/0xb0 [ 44.076025][ T406] cpuidle_idle_call+0x1f4/0x280 [ 44.076177][ T406] do_idle+0xf9/0x160 [ 44.076305][ T406] cpu_startup_entry+0x54/0x60 [ 44.076454][ T406] start_secondary+0x21c/0x2b0 [ 44.076605][ T406] common_startup_64+0x12c/0x138 [ 44.076753][ T406] [ 44.076753][ T406] to a SOFTIRQ-irq-unsafe lock: [ 44.076937][ T406] (&p->alloc_lock){+.+.}-{2:2} [ 44.076941][ T406] [ 44.076941][ T406] ... which became SOFTIRQ-irq-unsafe at: [ 44.077308][ T406] ... [ 44.077310][ T406] __lock_acquire+0x797/0x1570 [ 44.077537][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.077686][ T406] _raw_spin_lock+0x30/0x40 [ 44.077838][ T406] set_mems_allowed+0x1d/0x210 [ 44.077990][ T406] kernel_init_freeable+0x72/0x310 [ 44.078136][ T406] kernel_init+0x20/0x200 [ 44.078281][ T406] ret_from_fork+0x31/0x70 [ 44.078422][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.078559][ T406] [ 44.078559][ T406] other info that might help us debug this: [ 44.078559][ T406] [ 44.078826][ T406] Possible interrupt unsafe locking scenario: [ 44.078826][ T406] [ 44.079027][ T406] CPU0 CPU1 [ 44.079162][ T406] ---- ---- [ 44.079296][ T406] lock(&p->alloc_lock); [ 44.079402][ T406] local_irq_disable(); [ 44.079574][ T406] lock(&ndev->lock); [ 44.079745][ T406] lock(&p->alloc_lock); [ 44.079916][ T406] [ 44.080019][ T406] lock(&ndev->lock); [ 44.080125][ T406] [ 44.080125][ T406] *** DEADLOCK *** [ 44.080125][ T406] [ 44.080391][ T406] 3 locks held by sysctl/406: [ 44.080630][ T406] #0: ffff888005dd43f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 44.081032][ T406] #1: ffffffff9dd969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 44.081476][ T406] #2: ffff88800729d580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 44.081839][ T406] [ 44.081839][ T406] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 44.082129][ T406] -> (&ndev->lock){++--}-{2:2} { [ 44.082292][ T406] HARDIRQ-ON-W at: [ 44.082415][ T406] __lock_acquire+0x797/0x1570 [ 44.082612][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.082798][ T406] _raw_write_lock_bh+0x38/0x50 [ 44.082988][ T406] addrconf_permanent_addr+0x6e/0x670 [ 44.083177][ T406] addrconf_notify+0x749/0xd60 [ 44.083375][ T406] notifier_call_chain+0xcd/0x150 [ 44.083568][ T406] __dev_notify_flags+0xe6/0x250 [ 44.083756][ T406] dev_change_flags+0xec/0x160 [ 44.083946][ T406] do_setlink+0x7d6/0x21e0 [ 44.084134][ T406] __rtnl_newlink+0xaa7/0xd80 [ 44.084333][ T406] rtnl_newlink+0x63/0xa0 [ 44.084523][ T406] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.084723][ T406] netlink_rcv_skb+0x130/0x360 [ 44.084913][ T406] netlink_unicast+0x449/0x710 [ 44.085101][ T406] netlink_sendmsg+0x723/0xbe0 [ 44.085300][ T406] ____sys_sendmsg+0x7b2/0xa10 [ 44.085484][ T406] ___sys_sendmsg+0xee/0x170 [ 44.085676][ T406] __sys_sendmsg+0xcd/0x170 [ 44.085854][ T406] do_syscall_64+0xc6/0x1e0 [ 44.086048][ T406] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.086289][ T406] HARDIRQ-ON-R at: [ 44.086402][ T406] __lock_acquire+0x797/0x1570 [ 44.086592][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.086780][ T406] _raw_read_lock_bh+0x44/0x80 [ 44.086975][ T406] inet6_fill_ifla6_attrs+0x516/0x740 [ 44.087163][ T406] inet6_fill_link_af+0x5e/0xe0 [ 44.087355][ T406] rtnl_fill_ifinfo+0x1612/0x29e0 [ 44.087540][ T406] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 44.087725][ T406] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 44.087954][ T406] rtmsg_ifinfo+0x5b/0xa0 [ 44.088142][ T406] register_netdevice+0x1177/0x1690 [ 44.088332][ T406] register_netdev+0x20/0x40 [ 44.088524][ T406] sit_init_net+0x250/0x4f0 [ 44.088719][ T406] ops_init+0x9b/0x560 [ 44.088858][ T406] register_pernet_operations+0x2db/0x710 [ 44.089067][ T406] register_pernet_device+0x2a/0x60 [ 44.089237][ T406] sit_init+0x23/0xe0 [ 44.089379][ T406] do_one_initcall+0x8d/0x1e0 [ 44.089557][ T406] do_initcalls+0x1b2/0x3e0 [ 44.089737][ T406] kernel_init_freeable+0x232/0x310 [ 44.089910][ T406] kernel_init+0x20/0x200 [ 44.090081][ T406] ret_from_fork+0x31/0x70 [ 44.090256][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.090427][ T406] IN-SOFTIRQ-W at: [ 44.090533][ T406] __lock_acquire+0x797/0x1570 [ 44.090712][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.090977][ T406] _raw_write_lock+0x30/0x40 [ 44.091149][ T406] addrconf_rs_timer+0xa9/0x730 [ 44.091333][ T406] call_timer_fn+0x13b/0x230 [ 44.091508][ T406] __run_timers+0x545/0x810 [ 44.091761][ T406] run_timer_softirq+0xe8/0x1b0 [ 44.091935][ T406] __do_softirq+0x1f8/0x5df [ 44.092107][ T406] irq_exit_rcu+0x97/0xc0 [ 44.092359][ T406] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.092561][ T406] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.092782][ T406] default_idle+0xf/0x20 [ 44.093049][ T406] default_idle_call+0x6d/0xb0 [ 44.093233][ T406] cpuidle_idle_call+0x1f4/0x280 [ 44.093408][ T406] do_idle+0xf9/0x160 [ 44.093545][ T406] cpu_startup_entry+0x54/0x60 [ 44.093798][ T406] start_secondary+0x21c/0x2b0 [ 44.093970][ T406] common_startup_64+0x12c/0x138 [ 44.094142][ T406] IN-SOFTIRQ-R at: [ 44.094326][ T406] __lock_acquire+0x797/0x1570 [ 44.094499][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.094693][ T406] _raw_read_lock_bh+0x44/0x80 [ 44.094866][ T406] ipv6_get_lladdr+0xa9/0x3e0 [ 44.095155][ T406] addrconf_rs_timer+0x24a/0x730 [ 44.095345][ T406] call_timer_fn+0x13b/0x230 [ 44.095535][ T406] __run_timers+0x545/0x810 [ 44.095803][ T406] run_timer_softirq+0xe8/0x1b0 [ 44.095999][ T406] __do_softirq+0x1f8/0x5df [ 44.096182][ T406] irq_exit_rcu+0x97/0xc0 [ 44.096372][ T406] sysvec_apic_timer_interrupt+0x75/0x80 [ 44.096683][ T406] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 44.096907][ T406] default_idle+0xf/0x20 [ 44.097092][ T406] default_idle_call+0x6d/0xb0 [ 44.097285][ T406] cpuidle_idle_call+0x1f4/0x280 [ 44.097467][ T406] do_idle+0xf9/0x160 [ 44.097619][ T406] cpu_startup_entry+0x54/0x60 [ 44.097888][ T406] start_secondary+0x21c/0x2b0 [ 44.098073][ T406] common_startup_64+0x12c/0x138 [ 44.098259][ T406] INITIAL USE at: [ 44.098372][ T406] __lock_acquire+0x797/0x1570 [ 44.098646][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.098835][ T406] _raw_write_lock_bh+0x38/0x50 [ 44.099024][ T406] addrconf_permanent_addr+0x6e/0x670 [ 44.099370][ T406] addrconf_notify+0x749/0xd60 [ 44.099556][ T406] notifier_call_chain+0xcd/0x150 [ 44.099751][ T406] __dev_notify_flags+0xe6/0x250 [ 44.099929][ T406] dev_change_flags+0xec/0x160 [ 44.100186][ T406] do_setlink+0x7d6/0x21e0 [ 44.100360][ T406] __rtnl_newlink+0xaa7/0xd80 [ 44.100534][ T406] rtnl_newlink+0x63/0xa0 [ 44.100800][ T406] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 44.100972][ T406] netlink_rcv_skb+0x130/0x360 [ 44.101149][ T406] netlink_unicast+0x449/0x710 [ 44.101326][ T406] netlink_sendmsg+0x723/0xbe0 [ 44.101588][ T406] ____sys_sendmsg+0x7b2/0xa10 [ 44.101764][ T406] ___sys_sendmsg+0xee/0x170 [ 44.101937][ T406] __sys_sendmsg+0xcd/0x170 [ 44.102110][ T406] do_syscall_64+0xc6/0x1e0 [ 44.102297][ T406] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.102506][ T406] INITIAL READ USE at: [ 44.102618][ T406] __lock_acquire+0x797/0x1570 [ 44.102876][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.103050][ T406] _raw_read_lock_bh+0x44/0x80 [ 44.103228][ T406] inet6_fill_ifla6_attrs+0x516/0x740 [ 44.103519][ T406] inet6_fill_link_af+0x5e/0xe0 [ 44.103697][ T406] rtnl_fill_ifinfo+0x1612/0x29e0 [ 44.103873][ T406] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 44.104081][ T406] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 44.104291][ T406] rtmsg_ifinfo+0x5b/0xa0 [ 44.104461][ T406] register_netdevice+0x1177/0x1690 [ 44.104788][ T406] register_netdev+0x20/0x40 [ 44.104965][ T406] sit_init_net+0x250/0x4f0 [ 44.105159][ T406] ops_init+0x9b/0x560 [ 44.105442][ T406] register_pernet_operations+0x2db/0x710 [ 44.105662][ T406] register_pernet_device+0x2a/0x60 [ 44.105875][ T406] sit_init+0x23/0xe0 [ 44.106090][ T406] do_one_initcall+0x8d/0x1e0 [ 44.106296][ T406] do_initcalls+0x1b2/0x3e0 [ 44.106490][ T406] kernel_init_freeable+0x232/0x310 [ 44.106727][ T406] kernel_init+0x20/0x200 [ 44.107001][ T406] ret_from_fork+0x31/0x70 [ 44.107181][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.107371][ T406] } [ 44.107451][ T406] ... key at: [] __key.37+0x0/0x40 [ 44.107758][ T406] [ 44.107758][ T406] the dependencies between the lock to be acquired [ 44.107760][ T406] and SOFTIRQ-irq-unsafe lock: [ 44.108156][ T406] -> (&p->alloc_lock){+.+.}-{2:2} { [ 44.108403][ T406] HARDIRQ-ON-W at: [ 44.108508][ T406] __lock_acquire+0x797/0x1570 [ 44.108696][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.108879][ T406] _raw_spin_lock+0x30/0x40 [ 44.109157][ T406] set_mems_allowed+0x1d/0x210 [ 44.109335][ T406] kernel_init_freeable+0x72/0x310 [ 44.109522][ T406] kernel_init+0x20/0x200 [ 44.109783][ T406] ret_from_fork+0x31/0x70 [ 44.109956][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.110134][ T406] SOFTIRQ-ON-W at: [ 44.110239][ T406] __lock_acquire+0x797/0x1570 [ 44.110599][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.110769][ T406] _raw_spin_lock+0x30/0x40 [ 44.110939][ T406] set_mems_allowed+0x1d/0x210 [ 44.111118][ T406] kernel_init_freeable+0x72/0x310 [ 44.111289][ T406] kernel_init+0x20/0x200 [ 44.111461][ T406] ret_from_fork+0x31/0x70 [ 44.111639][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.111901][ T406] INITIAL USE at: [ 44.112007][ T406] __lock_acquire+0x797/0x1570 [ 44.112177][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.112439][ T406] _raw_spin_lock+0x30/0x40 [ 44.112617][ T406] set_mems_allowed+0x1d/0x210 [ 44.112788][ T406] kernel_init_freeable+0x72/0x310 [ 44.112974][ T406] kernel_init+0x20/0x200 [ 44.113146][ T406] ret_from_fork+0x31/0x70 [ 44.113324][ T406] ret_from_fork_asm+0x1a/0x30 [ 44.113507][ T406] } [ 44.113581][ T406] ... key at: [] __key.387+0x0/0x40 [ 44.113875][ T406] ... acquired at: [ 44.113983][ T406] check_prev_add+0x194/0xce0 [ 44.114123][ T406] validate_chain+0x71d/0x9b0 [ 44.114274][ T406] __lock_acquire+0xaf0/0x1570 [ 44.114500][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.114659][ T406] _raw_spin_lock+0x30/0x40 [ 44.114803][ T406] __get_task_comm+0x27/0x70 [ 44.114943][ T406] ref_tracker_alloc+0x2ee/0x490 [ 44.115092][ T406] netdev_get_by_index+0x5e/0x80 [ 44.115232][ T406] fib6_nh_init+0x3d8/0x15b0 [ 44.115377][ T406] ip6_route_info_create+0xf18/0x17d0 [ 44.115526][ T406] addrconf_f6i_alloc+0x265/0x560 [ 44.115744][ T406] __ipv6_dev_ac_inc+0x25f/0xb10 [ 44.115890][ T406] addrconf_join_anycast+0x1c0/0x220 [ 44.116032][ T406] dev_forward_change+0x2a6/0x7b0 [ 44.116191][ T406] addrconf_fixup_forwarding+0x23f/0x460 [ 44.116461][ T406] addrconf_sysctl_forward+0x212/0x2b0 [ 44.116597][ T406] proc_sys_call_handler+0x403/0x5e0 [ 44.116746][ T406] vfs_write+0x9e5/0x10a0 [ 44.116882][ T406] ksys_write+0xf5/0x1e0 [ 44.117018][ T406] do_syscall_64+0xc6/0x1e0 [ 44.117162][ T406] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.117349][ T406] [ 44.117419][ T406] [ 44.117419][ T406] stack backtrace: [ 44.117595][ T406] CPU: 1 PID: 406 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 44.117893][ T406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 44.118210][ T406] Call Trace: [ 44.118314][ T406] [ 44.118471][ T406] dump_stack_lvl+0x82/0xd0 [ 44.118621][ T406] print_bad_irq_dependency+0x957/0xd40 [ 44.118758][ T406] ? hlock_class+0x4e/0x130 [ 44.118902][ T406] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 44.119071][ T406] ? __pfx_usage_skip+0x10/0x10 [ 44.119220][ T406] ? __bfs+0x246/0x650 [ 44.119332][ T406] ? __pfx_usage_match+0x10/0x10 [ 44.119468][ T406] check_irq_usage+0x596/0x850 [ 44.119614][ T406] ? __pfx_check_irq_usage+0x10/0x10 [ 44.119831][ T406] ? __bfs+0x246/0x650 [ 44.119938][ T406] ? __pfx_hlock_conflict+0x10/0x10 [ 44.120073][ T406] ? check_path.constprop.0+0x24/0x50 [ 44.120212][ T406] ? check_noncircular+0x14c/0x3e0 [ 44.120431][ T406] ? __pfx_check_noncircular+0x10/0x10 [ 44.120578][ T406] ? check_prev_add+0x194/0xce0 [ 44.120713][ T406] check_prev_add+0x194/0xce0 [ 44.120849][ T406] ? validate_chain+0x130/0x9b0 [ 44.121145][ T406] validate_chain+0x71d/0x9b0 [ 44.121284][ T406] ? mark_lock+0x38/0x3e0 [ 44.121387][ T406] ? __pfx_validate_chain+0x10/0x10 [ 44.121523][ T406] ? hlock_class+0x4e/0x130 [ 44.121657][ T406] ? mark_lock+0x38/0x3e0 [ 44.121846][ T406] __lock_acquire+0xaf0/0x1570 [ 44.121984][ T406] lock_acquire.part.0+0xeb/0x330 [ 44.122120][ T406] ? __get_task_comm+0x27/0x70 [ 44.122261][ T406] ? mark_lock+0x38/0x3e0 [ 44.122364][ T406] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.122589][ T406] ? trace_lock_acquire+0x135/0x1c0 [ 44.122726][ T406] ? __get_task_comm+0x27/0x70 [ 44.122860][ T406] ? lock_acquire+0x32/0xc0 [ 44.122993][ T406] ? __get_task_comm+0x27/0x70 [ 44.123141][ T406] _raw_spin_lock+0x30/0x40 [ 44.123277][ T406] ? __get_task_comm+0x27/0x70 [ 44.123416][ T406] __get_task_comm+0x27/0x70 [ 44.123550][ T406] ref_tracker_alloc+0x2ee/0x490 [ 44.123770][ T406] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 44.123903][ T406] ? dev_get_by_index+0x177/0x270 [ 44.124038][ T406] ? netdev_get_by_index+0x5e/0x80 [ 44.124175][ T406] ? fib6_nh_init+0x3d8/0x15b0 [ 44.124399][ T406] ? ip6_route_info_create+0xf18/0x17d0 [ 44.124533][ T406] ? addrconf_f6i_alloc+0x265/0x560 [ 44.124691][ T406] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 44.124833][ T406] ? addrconf_join_anycast+0x1c0/0x220 [ 44.124969][ T406] ? dev_forward_change+0x2a6/0x7b0 [ 44.125188][ T406] ? addrconf_fixup_forwarding+0x23f/0x460 [ 44.125354][ T406] ? addrconf_sysctl_forward+0x212/0x2b0 [ 44.125495][ T406] ? proc_sys_call_handler+0x403/0x5e0 [ 44.125631][ T406] ? vfs_write+0x9e5/0x10a0 [ 44.125846][ T406] ? ksys_write+0xf5/0x1e0 [ 44.125980][ T406] ? do_syscall_64+0xc6/0x1e0 [ 44.126118][ T406] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.126291][ T406] ? dev_get_by_index+0x177/0x270 [ 44.126511][ T406] netdev_get_by_index+0x5e/0x80 [ 44.126647][ T406] fib6_nh_init+0x3d8/0x15b0 [ 44.126782][ T406] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 44.126962][ T406] ? __pfx_fib6_nh_init+0x10/0x10 [ 44.127107][ T406] ? kasan_save_track+0x14/0x30 [ 44.127246][ T406] ? __kasan_kmalloc+0x7f/0x90 [ 44.127387][ T406] ? __kmalloc+0x1d7/0x3c0 [ 44.127524][ T406] ? fib6_get_table+0x116/0x290 [ 44.127751][ T406] ip6_route_info_create+0xf18/0x17d0 [ 44.127884][ T406] ? __lock_release+0x103/0x460 [ 44.128024][ T406] ? __pfx_ip6_route_info_create+0x10/0x10 [ 44.128198][ T406] ? addrconf_f6i_alloc+0x12d/0x560 [ 44.128415][ T406] addrconf_f6i_alloc+0x265/0x560 [ 44.128550][ T406] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 44.128689][ T406] ? do_raw_write_lock+0x122/0x3b0 [ 44.128824][ T406] ? __pfx_do_raw_write_lock+0x10/0x10 [ 44.129042][ T406] ? lock_acquire+0x32/0xc0 [ 44.129178][ T406] __ipv6_dev_ac_inc+0x25f/0xb10 [ 44.129316][ T406] addrconf_join_anycast+0x1c0/0x220 [ 44.129457][ T406] ? mark_lock+0x38/0x3e0 [ 44.129560][ T406] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 44.129823][ T406] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 44.129995][ T406] dev_forward_change+0x2a6/0x7b0 [ 44.130139][ T406] ? __pfx_dev_forward_change+0x10/0x10 [ 44.130384][ T406] addrconf_fixup_forwarding+0x23f/0x460 [ 44.130524][ T406] addrconf_sysctl_forward+0x212/0x2b0 [ 44.130670][ T406] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 44.130843][ T406] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 44.131107][ T406] ? trace_kmalloc+0x2a/0xe0 [ 44.131252][ T406] ? __kmalloc_node+0x220/0x400 [ 44.131391][ T406] ? proc_sys_call_handler+0x30b/0x5e0 [ 44.131528][ T406] proc_sys_call_handler+0x403/0x5e0 [ 44.131844][ T406] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 44.132036][ T406] ? __lock_acquire+0xaf0/0x1570 [ 44.132195][ T406] vfs_write+0x9e5/0x10a0 [ 44.132297][ T406] ? do_user_addr_fault+0x449/0xbe0 [ 44.132442][ T406] ? __pfx_vfs_write+0x10/0x10 [ 44.132657][ T406] ? find_held_lock+0x2c/0x110 [ 44.132800][ T406] ? __pfx___lock_release+0x10/0x10 [ 44.132936][ T406] ? __fget_light+0x53/0x1e0 [ 44.133076][ T406] ksys_write+0xf5/0x1e0 [ 44.133267][ T406] ? __pfx_ksys_write+0x10/0x10 [ 44.133407][ T406] ? do_user_addr_fault+0x4bd/0xbe0 [ 44.133548][ T406] do_syscall_64+0xc6/0x1e0 [ 44.133691][ T406] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 44.133952][ T406] RIP: 0033:0x7f4ca56e7957 [ 44.134100][ T406] 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 [ 44.134705][ T406] RSP: 002b:00007ffe1a4d2c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 44.134926][ T406] RAX: ffffffffffffffda RBX: 00005644d36a1360 RCX: 00007f4ca56e7957 [ 44.135146][ T406] RDX: 0000000000000002 RSI: 00005644d36a13a0 RDI: 0000000000000005 [ 44.135434][ T406] RBP: 00005644d36a34d0 R08: 0000000000000003 R09: 0000000000000077 [ 44.135642][ T406] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 44.135853][ T406] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f4ca579e9c0 [ 44.136147][ T406]