[ 36.458906][ T314] gre: GRE over IPv4 demultiplexor driver [ 36.600802][ T314] ip6_gre: GRE over IPv6 tunneling driver [ 36.630598][ T313] ip (313) used greatest stack depth: 23488 bytes left [ 36.739261][ T316] ip (316) used greatest stack depth: 23408 bytes left [ 39.127892][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 43.848533][ T374] GACT probability NOT on [ 48.398887][ T411] [ 48.399016][ T411] ===================================================== [ 48.399204][ T411] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 48.399413][ T411] 6.9.0-rc1-virtme #1 Not tainted [ 48.399558][ T411] ----------------------------------------------------- [ 48.399775][ T411] sysctl/411 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 48.400073][ T411] ffff888006088968 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 48.400500][ T411] [ 48.400500][ T411] and this task is already holding: [ 48.400841][ T411] ffff88800582a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 48.401231][ T411] which would create a new lock dependency: [ 48.401511][ T411] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 48.401866][ T411] [ 48.401866][ T411] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 48.402258][ T411] (&ndev->lock){++--}-{2:2} [ 48.402265][ T411] [ 48.402265][ T411] ... which became SOFTIRQ-irq-safe at: [ 48.402837][ T411] __lock_acquire+0x797/0x1570 [ 48.403085][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.403318][ T411] _raw_write_lock+0x30/0x40 [ 48.403551][ T411] addrconf_rs_timer+0xa9/0x730 [ 48.403782][ T411] call_timer_fn+0x13b/0x230 [ 48.404015][ T411] __run_timers+0x545/0x810 [ 48.404244][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.404482][ T411] __do_softirq+0x1f8/0x5df [ 48.404721][ T411] irq_exit_rcu+0x97/0xc0 [ 48.404953][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.405183][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.405473][ T411] default_idle+0xf/0x20 [ 48.405648][ T411] default_idle_call+0x6d/0xb0 [ 48.405881][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.406120][ T411] do_idle+0xf9/0x160 [ 48.406296][ T411] cpu_startup_entry+0x54/0x60 [ 48.406552][ T411] start_secondary+0x21c/0x2b0 [ 48.406799][ T411] common_startup_64+0x12c/0x138 [ 48.407030][ T411] [ 48.407030][ T411] to a SOFTIRQ-irq-unsafe lock: [ 48.407311][ T411] (&p->alloc_lock){+.+.}-{2:2} [ 48.407320][ T411] [ 48.407320][ T411] ... which became SOFTIRQ-irq-unsafe at: [ 48.407885][ T411] ... [ 48.407888][ T411] __lock_acquire+0x797/0x1570 [ 48.408235][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.408470][ T411] _raw_spin_lock+0x30/0x40 [ 48.408688][ T411] set_mems_allowed+0x1d/0x210 [ 48.408909][ T411] kernel_init_freeable+0x72/0x310 [ 48.409134][ T411] kernel_init+0x20/0x200 [ 48.409356][ T411] ret_from_fork+0x31/0x70 [ 48.409533][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.409680][ T411] [ 48.409680][ T411] other info that might help us debug this: [ 48.409680][ T411] [ 48.409971][ T411] Possible interrupt unsafe locking scenario: [ 48.409971][ T411] [ 48.410208][ T411] CPU0 CPU1 [ 48.410360][ T411] ---- ---- [ 48.410510][ T411] lock(&p->alloc_lock); [ 48.410626][ T411] local_irq_disable(); [ 48.410807][ T411] lock(&ndev->lock); [ 48.411004][ T411] lock(&p->alloc_lock); [ 48.411196][ T411] [ 48.411315][ T411] lock(&ndev->lock); [ 48.411433][ T411] [ 48.411433][ T411] *** DEADLOCK *** [ 48.411433][ T411] [ 48.411656][ T411] 3 locks held by sysctl/411: [ 48.411810][ T411] #0: ffff8880061dc3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 48.412090][ T411] #1: ffffffff93d969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 48.412410][ T411] #2: ffff88800582a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 48.412686][ T411] [ 48.412686][ T411] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 48.412983][ T411] -> (&ndev->lock){++--}-{2:2} { [ 48.413145][ T411] HARDIRQ-ON-W at: [ 48.413272][ T411] __lock_acquire+0x797/0x1570 [ 48.413472][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.413667][ T411] _raw_write_lock_bh+0x38/0x50 [ 48.413864][ T411] addrconf_permanent_addr+0x6e/0x670 [ 48.414057][ T411] addrconf_notify+0x749/0xd60 [ 48.414263][ T411] notifier_call_chain+0xcd/0x150 [ 48.414455][ T411] __dev_notify_flags+0xe6/0x250 [ 48.414650][ T411] dev_change_flags+0xec/0x160 [ 48.414845][ T411] do_setlink+0x7d6/0x21e0 [ 48.415047][ T411] __rtnl_newlink+0xaa7/0xd80 [ 48.415243][ T411] rtnl_newlink+0x63/0xa0 [ 48.415435][ T411] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 48.415626][ T411] netlink_rcv_skb+0x130/0x360 [ 48.415819][ T411] netlink_unicast+0x449/0x710 [ 48.416021][ T411] netlink_sendmsg+0x723/0xbe0 [ 48.416201][ T411] ____sys_sendmsg+0x7b2/0xa10 [ 48.416410][ T411] ___sys_sendmsg+0xee/0x170 [ 48.416585][ T411] __sys_sendmsg+0xcd/0x170 [ 48.416759][ T411] do_syscall_64+0xc6/0x1e0 [ 48.416940][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.417175][ T411] HARDIRQ-ON-R at: [ 48.417301][ T411] __lock_acquire+0x797/0x1570 [ 48.417494][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.417680][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.417860][ T411] inet6_fill_ifla6_attrs+0x516/0x740 [ 48.418084][ T411] inet6_fill_link_af+0x5e/0xe0 [ 48.418306][ T411] rtnl_fill_ifinfo+0x1612/0x29e0 [ 48.418598][ T411] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 48.419038][ T411] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 48.419383][ T411] rtmsg_ifinfo+0x5b/0xa0 [ 48.419678][ T411] register_netdevice+0x1177/0x1690 [ 48.420124][ T411] register_netdev+0x20/0x40 [ 48.420428][ T411] sit_init_net+0x250/0x4f0 [ 48.420723][ T411] ops_init+0x9b/0x560 [ 48.420972][ T411] register_pernet_operations+0x2db/0x710 [ 48.421329][ T411] register_pernet_device+0x2a/0x60 [ 48.421623][ T411] sit_init+0x23/0xe0 [ 48.421865][ T411] do_one_initcall+0x8d/0x1e0 [ 48.422308][ T411] do_initcalls+0x1b2/0x3e0 [ 48.422604][ T411] kernel_init_freeable+0x232/0x310 [ 48.422899][ T411] kernel_init+0x20/0x200 [ 48.423194][ T411] ret_from_fork+0x31/0x70 [ 48.423779][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.424076][ T411] IN-SOFTIRQ-W at: [ 48.424272][ T411] __lock_acquire+0x797/0x1570 [ 48.424550][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.424972][ T411] _raw_write_lock+0x30/0x40 [ 48.425289][ T411] addrconf_rs_timer+0xa9/0x730 [ 48.425598][ T411] call_timer_fn+0x13b/0x230 [ 48.426020][ T411] __run_timers+0x545/0x810 [ 48.426290][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.426561][ T411] __do_softirq+0x1f8/0x5df [ 48.426967][ T411] irq_exit_rcu+0x97/0xc0 [ 48.427283][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.427610][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.427902][ T411] default_idle+0xf/0x20 [ 48.428075][ T411] default_idle_call+0x6d/0xb0 [ 48.428257][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.428432][ T411] do_idle+0xf9/0x160 [ 48.428656][ T411] cpu_startup_entry+0x54/0x60 [ 48.428836][ T411] start_secondary+0x21c/0x2b0 [ 48.429011][ T411] common_startup_64+0x12c/0x138 [ 48.429274][ T411] IN-SOFTIRQ-R at: [ 48.429380][ T411] __lock_acquire+0x797/0x1570 [ 48.429555][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.429745][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.430013][ T411] ipv6_get_lladdr+0xa9/0x3e0 [ 48.430215][ T411] addrconf_rs_timer+0x24a/0x730 [ 48.430384][ T411] call_timer_fn+0x13b/0x230 [ 48.430569][ T411] __run_timers+0x545/0x810 [ 48.430763][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.430965][ T411] __do_softirq+0x1f8/0x5df [ 48.431136][ T411] irq_exit_rcu+0x97/0xc0 [ 48.431341][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.431550][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.431769][ T411] default_idle+0xf/0x20 [ 48.432046][ T411] default_idle_call+0x6d/0xb0 [ 48.432230][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.432419][ T411] do_idle+0xf9/0x160 [ 48.432560][ T411] cpu_startup_entry+0x54/0x60 [ 48.432839][ T411] start_secondary+0x21c/0x2b0 [ 48.433010][ T411] common_startup_64+0x12c/0x138 [ 48.433206][ T411] INITIAL USE at: [ 48.433391][ T411] __lock_acquire+0x797/0x1570 [ 48.433576][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.433751][ T411] _raw_write_lock_bh+0x38/0x50 [ 48.433927][ T411] addrconf_permanent_addr+0x6e/0x670 [ 48.434183][ T411] addrconf_notify+0x749/0xd60 [ 48.434389][ T411] notifier_call_chain+0xcd/0x150 [ 48.434599][ T411] __dev_notify_flags+0xe6/0x250 [ 48.434777][ T411] dev_change_flags+0xec/0x160 [ 48.434951][ T411] do_setlink+0x7d6/0x21e0 [ 48.435126][ T411] __rtnl_newlink+0xaa7/0xd80 [ 48.435309][ T411] rtnl_newlink+0x63/0xa0 [ 48.435564][ T411] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 48.435741][ T411] netlink_rcv_skb+0x130/0x360 [ 48.435914][ T411] netlink_unicast+0x449/0x710 [ 48.436274][ T411] netlink_sendmsg+0x723/0xbe0 [ 48.436459][ T411] ____sys_sendmsg+0x7b2/0xa10 [ 48.436642][ T411] ___sys_sendmsg+0xee/0x170 [ 48.436894][ T411] __sys_sendmsg+0xcd/0x170 [ 48.437065][ T411] do_syscall_64+0xc6/0x1e0 [ 48.437238][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.437452][ T411] INITIAL READ USE at: [ 48.437637][ T411] __lock_acquire+0x797/0x1570 [ 48.437812][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.437995][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.438251][ T411] inet6_fill_ifla6_attrs+0x516/0x740 [ 48.438482][ T411] inet6_fill_link_af+0x5e/0xe0 [ 48.438656][ T411] rtnl_fill_ifinfo+0x1612/0x29e0 [ 48.438827][ T411] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 48.439120][ T411] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 48.439332][ T411] rtmsg_ifinfo+0x5b/0xa0 [ 48.439504][ T411] register_netdevice+0x1177/0x1690 [ 48.439792][ T411] register_netdev+0x20/0x40 [ 48.439964][ T411] sit_init_net+0x250/0x4f0 [ 48.440137][ T411] ops_init+0x9b/0x560 [ 48.440445][ T411] register_pernet_operations+0x2db/0x710 [ 48.440658][ T411] register_pernet_device+0x2a/0x60 [ 48.440877][ T411] sit_init+0x23/0xe0 [ 48.441157][ T411] do_one_initcall+0x8d/0x1e0 [ 48.441338][ T411] do_initcalls+0x1b2/0x3e0 [ 48.441533][ T411] kernel_init_freeable+0x232/0x310 [ 48.441742][ T411] kernel_init+0x20/0x200 [ 48.441918][ T411] ret_from_fork+0x31/0x70 [ 48.442086][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.442266][ T411] } [ 48.442356][ T411] ... key at: [] __key.37+0x0/0x40 [ 48.442573][ T411] [ 48.442573][ T411] the dependencies between the lock to be acquired [ 48.442575][ T411] and SOFTIRQ-irq-unsafe lock: [ 48.443020][ T411] -> (&p->alloc_lock){+.+.}-{2:2} { [ 48.443166][ T411] HARDIRQ-ON-W at: [ 48.443276][ T411] __lock_acquire+0x797/0x1570 [ 48.443470][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.443722][ T411] _raw_spin_lock+0x30/0x40 [ 48.443901][ T411] set_mems_allowed+0x1d/0x210 [ 48.444068][ T411] kernel_init_freeable+0x72/0x310 [ 48.444358][ T411] kernel_init+0x20/0x200 [ 48.444533][ T411] ret_from_fork+0x31/0x70 [ 48.444748][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.444920][ T411] SOFTIRQ-ON-W at: [ 48.445114][ T411] __lock_acquire+0x797/0x1570 [ 48.445309][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.445501][ T411] _raw_spin_lock+0x30/0x40 [ 48.445684][ T411] set_mems_allowed+0x1d/0x210 [ 48.445865][ T411] kernel_init_freeable+0x72/0x310 [ 48.446037][ T411] kernel_init+0x20/0x200 [ 48.446212][ T411] ret_from_fork+0x31/0x70 [ 48.446428][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.446605][ T411] INITIAL USE at: [ 48.446715][ T411] __lock_acquire+0x797/0x1570 [ 48.446891][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.447163][ T411] _raw_spin_lock+0x30/0x40 [ 48.447346][ T411] set_mems_allowed+0x1d/0x210 [ 48.447527][ T411] kernel_init_freeable+0x72/0x310 [ 48.447707][ T411] kernel_init+0x20/0x200 [ 48.447880][ T411] ret_from_fork+0x31/0x70 [ 48.448063][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.448243][ T411] } [ 48.448317][ T411] ... key at: [] __key.387+0x0/0x40 [ 48.448540][ T411] ... acquired at: [ 48.448649][ T411] check_prev_add+0x194/0xce0 [ 48.448791][ T411] validate_chain+0x71d/0x9b0 [ 48.449013][ T411] __lock_acquire+0xaf0/0x1570 [ 48.449152][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.449296][ T411] _raw_spin_lock+0x30/0x40 [ 48.449445][ T411] __get_task_comm+0x27/0x70 [ 48.449592][ T411] ref_tracker_alloc+0x2ee/0x490 [ 48.449733][ T411] netdev_get_by_index+0x5e/0x80 [ 48.449872][ T411] fib6_nh_init+0x3d8/0x15b0 [ 48.450011][ T411] ip6_route_info_create+0xf18/0x17d0 [ 48.450149][ T411] addrconf_f6i_alloc+0x265/0x560 [ 48.450288][ T411] __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.450447][ T411] addrconf_join_anycast+0x1c0/0x220 [ 48.450586][ T411] dev_forward_change+0x2a6/0x7b0 [ 48.450725][ T411] addrconf_fixup_forwarding+0x23f/0x460 [ 48.450998][ T411] addrconf_sysctl_forward+0x212/0x2b0 [ 48.451137][ T411] proc_sys_call_handler+0x403/0x5e0 [ 48.451275][ T411] vfs_write+0x9e5/0x10a0 [ 48.451419][ T411] ksys_write+0xf5/0x1e0 [ 48.451637][ T411] do_syscall_64+0xc6/0x1e0 [ 48.451815][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.451986][ T411] [ 48.452058][ T411] [ 48.452058][ T411] stack backtrace: [ 48.452306][ T411] CPU: 1 PID: 411 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 48.452523][ T411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 48.452834][ T411] Call Trace: [ 48.453026][ T411] [ 48.453098][ T411] dump_stack_lvl+0x82/0xd0 [ 48.453241][ T411] print_bad_irq_dependency+0x957/0xd40 [ 48.453383][ T411] ? hlock_class+0x4e/0x130 [ 48.453532][ T411] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 48.453787][ T411] ? __pfx_usage_skip+0x10/0x10 [ 48.453931][ T411] ? __bfs+0x246/0x650 [ 48.454033][ T411] ? __pfx_usage_match+0x10/0x10 [ 48.454169][ T411] check_irq_usage+0x596/0x850 [ 48.454398][ T411] ? __pfx_check_irq_usage+0x10/0x10 [ 48.454547][ T411] ? __bfs+0x246/0x650 [ 48.454651][ T411] ? __pfx_hlock_conflict+0x10/0x10 [ 48.454788][ T411] ? check_path.constprop.0+0x24/0x50 [ 48.455028][ T411] ? check_noncircular+0x14c/0x3e0 [ 48.455167][ T411] ? __pfx_check_noncircular+0x10/0x10 [ 48.455311][ T411] ? check_prev_add+0x194/0xce0 [ 48.455456][ T411] check_prev_add+0x194/0xce0 [ 48.455613][ T411] ? validate_chain+0x130/0x9b0 [ 48.455751][ T411] validate_chain+0x71d/0x9b0 [ 48.455895][ T411] ? mark_lock+0x38/0x3e0 [ 48.455999][ T411] ? __pfx_validate_chain+0x10/0x10 [ 48.456134][ T411] ? hlock_class+0x4e/0x130 [ 48.456269][ T411] ? mark_lock+0x38/0x3e0 [ 48.456387][ T411] __lock_acquire+0xaf0/0x1570 [ 48.456543][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.456683][ T411] ? __get_task_comm+0x27/0x70 [ 48.456826][ T411] ? mark_lock+0x38/0x3e0 [ 48.457022][ T411] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.457159][ T411] ? trace_lock_acquire+0x135/0x1c0 [ 48.457297][ T411] ? __get_task_comm+0x27/0x70 [ 48.457438][ T411] ? lock_acquire+0x32/0xc0 [ 48.457745][ T411] ? __get_task_comm+0x27/0x70 [ 48.457888][ T411] _raw_spin_lock+0x30/0x40 [ 48.458026][ T411] ? __get_task_comm+0x27/0x70 [ 48.458173][ T411] __get_task_comm+0x27/0x70 [ 48.458399][ T411] ref_tracker_alloc+0x2ee/0x490 [ 48.458550][ T411] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 48.458688][ T411] ? dev_get_by_index+0x177/0x270 [ 48.458829][ T411] ? netdev_get_by_index+0x5e/0x80 [ 48.458969][ T411] ? fib6_nh_init+0x3d8/0x15b0 [ 48.459189][ T411] ? ip6_route_info_create+0xf18/0x17d0 [ 48.459325][ T411] ? addrconf_f6i_alloc+0x265/0x560 [ 48.459467][ T411] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.459629][ T411] ? addrconf_join_anycast+0x1c0/0x220 [ 48.459771][ T411] ? dev_forward_change+0x2a6/0x7b0 [ 48.459915][ T411] ? addrconf_fixup_forwarding+0x23f/0x460 [ 48.460093][ T411] ? addrconf_sysctl_forward+0x212/0x2b0 [ 48.460237][ T411] ? proc_sys_call_handler+0x403/0x5e0 [ 48.460461][ T411] ? vfs_write+0x9e5/0x10a0 [ 48.460617][ T411] ? ksys_write+0xf5/0x1e0 [ 48.460757][ T411] ? do_syscall_64+0xc6/0x1e0 [ 48.460904][ T411] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.461159][ T411] ? dev_get_by_index+0x177/0x270 [ 48.461297][ T411] netdev_get_by_index+0x5e/0x80 [ 48.461435][ T411] fib6_nh_init+0x3d8/0x15b0 [ 48.461587][ T411] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 48.461847][ T411] ? __pfx_fib6_nh_init+0x10/0x10 [ 48.461984][ T411] ? kasan_save_track+0x14/0x30 [ 48.462131][ T411] ? __kasan_kmalloc+0x7f/0x90 [ 48.462267][ T411] ? __kmalloc+0x1d7/0x3c0 [ 48.462485][ T411] ? fib6_get_table+0x116/0x290 [ 48.462632][ T411] ip6_route_info_create+0xf18/0x17d0 [ 48.462775][ T411] ? __lock_release+0x103/0x460 [ 48.462924][ T411] ? __pfx_ip6_route_info_create+0x10/0x10 [ 48.463181][ T411] ? addrconf_f6i_alloc+0x12d/0x560 [ 48.463319][ T411] addrconf_f6i_alloc+0x265/0x560 [ 48.463460][ T411] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 48.463623][ T411] ? do_raw_write_lock+0x122/0x3b0 [ 48.463845][ T411] ? __pfx_do_raw_write_lock+0x10/0x10 [ 48.463988][ T411] ? lock_acquire+0x32/0xc0 [ 48.464128][ T411] __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.464269][ T411] addrconf_join_anycast+0x1c0/0x220 [ 48.464410][ T411] ? mark_lock+0x38/0x3e0 [ 48.464604][ T411] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 48.464780][ T411] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 48.464956][ T411] dev_forward_change+0x2a6/0x7b0 [ 48.465104][ T411] ? __pfx_dev_forward_change+0x10/0x10 [ 48.465324][ T411] addrconf_fixup_forwarding+0x23f/0x460 [ 48.465467][ T411] addrconf_sysctl_forward+0x212/0x2b0 [ 48.465617][ T411] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 48.465787][ T411] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 48.466049][ T411] ? trace_kmalloc+0x2a/0xe0 [ 48.466184][ T411] ? __kmalloc_node+0x220/0x400 [ 48.466340][ T411] ? proc_sys_call_handler+0x30b/0x5e0 [ 48.466482][ T411] proc_sys_call_handler+0x403/0x5e0 [ 48.466715][ T411] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 48.466894][ T411] ? __lock_acquire+0xaf0/0x1570 [ 48.467047][ T411] vfs_write+0x9e5/0x10a0 [ 48.467152][ T411] ? do_user_addr_fault+0x449/0xbe0 [ 48.467377][ T411] ? __pfx_vfs_write+0x10/0x10 [ 48.467515][ T411] ? find_held_lock+0x2c/0x110 [ 48.467666][ T411] ? __pfx___lock_release+0x10/0x10 [ 48.467807][ T411] ? __fget_light+0x53/0x1e0 [ 48.468040][ T411] ksys_write+0xf5/0x1e0 [ 48.468147][ T411] ? __pfx_ksys_write+0x10/0x10 [ 48.468288][ T411] ? do_user_addr_fault+0x4bd/0xbe0 [ 48.468430][ T411] do_syscall_64+0xc6/0x1e0 [ 48.468570][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.468755][ T411] RIP: 0033:0x7f77034e2957 [ 48.468903][ T411] 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 [ 48.469492][ T411] RSP: 002b:00007fff3d7d2f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 48.469718][ T411] RAX: ffffffffffffffda RBX: 000055ca57a31360 RCX: 00007f77034e2957 [ 48.470018][ T411] RDX: 0000000000000002 RSI: 000055ca57a313a0 RDI: 0000000000000005 [ 48.470234][ T411] RBP: 000055ca57a334d0 R08: 0000000000000003 R09: 0000000000000077 [ 48.470444][ T411] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 48.470663][ T411] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f77035999c0 [ 48.470877][ T411] WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr