[ 28.841700][ T235] ip (235) used greatest stack depth: 24224 bytes left [ 30.598717][ T264] ip (264) used greatest stack depth: 23520 bytes left [ 36.579181][ T313] gre: GRE over IPv4 demultiplexor driver [ 36.604114][ T313] ip_gre: GRE over IPv4 tunneling driver [ 39.231444][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 43.860019][ T374] GACT probability NOT on [ 48.584373][ T411] [ 48.584546][ T411] ===================================================== [ 48.584841][ T411] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 48.585209][ T411] 6.9.0-rc1-virtme #1 Not tainted [ 48.585429][ T411] ----------------------------------------------------- [ 48.585722][ T411] sysctl/411 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 48.586051][ T411] ffff888005ab2c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 48.586455][ T411] [ 48.586455][ T411] and this task is already holding: [ 48.586788][ T411] ffff88800523a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 48.587188][ T411] which would create a new lock dependency: [ 48.587458][ T411] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 48.587813][ T411] [ 48.587813][ T411] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 48.588185][ T411] (&ndev->lock){++--}-{2:2} [ 48.588193][ T411] [ 48.588193][ T411] ... which became SOFTIRQ-irq-safe at: [ 48.588743][ T411] __lock_acquire+0x797/0x1570 [ 48.588975][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.589194][ T411] _raw_write_lock+0x30/0x40 [ 48.589428][ T411] addrconf_rs_timer+0xa9/0x730 [ 48.589656][ T411] call_timer_fn+0x13b/0x230 [ 48.589885][ T411] __run_timers+0x545/0x810 [ 48.590110][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.590332][ T411] __do_softirq+0x1f8/0x5df [ 48.590557][ T411] irq_exit_rcu+0x97/0xc0 [ 48.590784][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.591001][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.591281][ T411] default_idle+0xf/0x20 [ 48.591461][ T411] default_idle_call+0x6d/0xb0 [ 48.591695][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.591925][ T411] do_idle+0xf9/0x160 [ 48.592093][ T411] cpu_startup_entry+0x54/0x60 [ 48.592298][ T411] start_secondary+0x21c/0x2b0 [ 48.592528][ T411] common_startup_64+0x12c/0x138 [ 48.592786][ T411] [ 48.592786][ T411] to a SOFTIRQ-irq-unsafe lock: [ 48.593072][ T411] (&p->alloc_lock){+.+.}-{2:2} [ 48.593081][ T411] [ 48.593081][ T411] ... which became SOFTIRQ-irq-unsafe at: [ 48.593696][ T411] ... [ 48.593699][ T411] __lock_acquire+0x797/0x1570 [ 48.594046][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.594271][ T411] _raw_spin_lock+0x30/0x40 [ 48.594526][ T411] set_mems_allowed+0x1d/0x210 [ 48.594770][ T411] kernel_init_freeable+0x72/0x310 [ 48.595010][ T411] kernel_init+0x20/0x200 [ 48.595248][ T411] ret_from_fork+0x31/0x70 [ 48.595493][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.595764][ T411] [ 48.595764][ T411] other info that might help us debug this: [ 48.595764][ T411] [ 48.596223][ T411] Possible interrupt unsafe locking scenario: [ 48.596223][ T411] [ 48.596599][ T411] CPU0 CPU1 [ 48.596825][ T411] ---- ---- [ 48.597042][ T411] lock(&p->alloc_lock); [ 48.597223][ T411] local_irq_disable(); [ 48.597497][ T411] lock(&ndev->lock); [ 48.597776][ T411] lock(&p->alloc_lock); [ 48.598053][ T411] [ 48.598222][ T411] lock(&ndev->lock); [ 48.598398][ T411] [ 48.598398][ T411] *** DEADLOCK *** [ 48.598398][ T411] [ 48.598718][ T411] 3 locks held by sysctl/411: [ 48.598943][ T411] #0: ffff88800634c3f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 48.599350][ T411] #1: ffffffffa4f969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 48.599803][ T411] #2: ffff88800523a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 48.600201][ T411] [ 48.600201][ T411] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 48.600649][ T411] -> (&ndev->lock){++--}-{2:2} { [ 48.600888][ T411] HARDIRQ-ON-W at: [ 48.601068][ T411] __lock_acquire+0x797/0x1570 [ 48.601358][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.601647][ T411] _raw_write_lock_bh+0x38/0x50 [ 48.601936][ T411] addrconf_permanent_addr+0x6e/0x670 [ 48.602219][ T411] addrconf_notify+0x749/0xd60 [ 48.602523][ T411] notifier_call_chain+0xcd/0x150 [ 48.602810][ T411] __dev_notify_flags+0xe6/0x250 [ 48.603092][ T411] dev_change_flags+0xec/0x160 [ 48.603382][ T411] do_setlink+0x7d6/0x21e0 [ 48.603669][ T411] __rtnl_newlink+0xaa7/0xd80 [ 48.603955][ T411] rtnl_newlink+0x63/0xa0 [ 48.604244][ T411] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 48.604526][ T411] netlink_rcv_skb+0x130/0x360 [ 48.604815][ T411] netlink_unicast+0x449/0x710 [ 48.605097][ T411] netlink_sendmsg+0x723/0xbe0 [ 48.605396][ T411] ____sys_sendmsg+0x7b2/0xa10 [ 48.605683][ T411] ___sys_sendmsg+0xee/0x170 [ 48.605967][ T411] __sys_sendmsg+0xcd/0x170 [ 48.606260][ T411] do_syscall_64+0xc6/0x1e0 [ 48.606551][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.606891][ T411] HARDIRQ-ON-R at: [ 48.607061][ T411] __lock_acquire+0x797/0x1570 [ 48.607351][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.607632][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.607911][ T411] inet6_fill_ifla6_attrs+0x516/0x740 [ 48.608204][ T411] inet6_fill_link_af+0x5e/0xe0 [ 48.608489][ T411] rtnl_fill_ifinfo+0x1612/0x29e0 [ 48.608774][ T411] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 48.609060][ T411] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 48.609410][ T411] rtmsg_ifinfo+0x5b/0xa0 [ 48.609694][ T411] register_netdevice+0x1177/0x1690 [ 48.609990][ T411] register_netdev+0x20/0x40 [ 48.610278][ T411] sit_init_net+0x250/0x4f0 [ 48.610574][ T411] ops_init+0x9b/0x560 [ 48.610812][ T411] register_pernet_operations+0x2db/0x710 [ 48.611164][ T411] register_pernet_device+0x2a/0x60 [ 48.611461][ T411] sit_init+0x23/0xe0 [ 48.611704][ T411] do_one_initcall+0x8d/0x1e0 [ 48.611993][ T411] do_initcalls+0x1b2/0x3e0 [ 48.612288][ T411] kernel_init_freeable+0x232/0x310 [ 48.612567][ T411] kernel_init+0x20/0x200 [ 48.612855][ T411] ret_from_fork+0x31/0x70 [ 48.613145][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.613466][ T411] IN-SOFTIRQ-W at: [ 48.613653][ T411] __lock_acquire+0x797/0x1570 [ 48.613938][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.614220][ T411] _raw_write_lock+0x30/0x40 [ 48.614514][ T411] addrconf_rs_timer+0xa9/0x730 [ 48.614795][ T411] call_timer_fn+0x13b/0x230 [ 48.615078][ T411] __run_timers+0x545/0x810 [ 48.615372][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.615651][ T411] __do_softirq+0x1f8/0x5df [ 48.615932][ T411] irq_exit_rcu+0x97/0xc0 [ 48.616222][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.616562][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.616902][ T411] default_idle+0xf/0x20 [ 48.617183][ T411] default_idle_call+0x6d/0xb0 [ 48.617481][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.617770][ T411] do_idle+0xf9/0x160 [ 48.617996][ T411] cpu_startup_entry+0x54/0x60 [ 48.618286][ T411] start_secondary+0x21c/0x2b0 [ 48.618564][ T411] common_startup_64+0x12c/0x138 [ 48.618845][ T411] IN-SOFTIRQ-R at: [ 48.619025][ T411] __lock_acquire+0x797/0x1570 [ 48.619313][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.619590][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.619874][ T411] ipv6_get_lladdr+0xa9/0x3e0 [ 48.620156][ T411] addrconf_rs_timer+0x24a/0x730 [ 48.620441][ T411] call_timer_fn+0x13b/0x230 [ 48.620724][ T411] __run_timers+0x545/0x810 [ 48.621016][ T411] run_timer_softirq+0xe8/0x1b0 [ 48.621457][ T411] __do_softirq+0x1f8/0x5df [ 48.621735][ T411] irq_exit_rcu+0x97/0xc0 [ 48.622023][ T411] sysvec_apic_timer_interrupt+0x75/0x80 [ 48.622519][ T411] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.622855][ T411] default_idle+0xf/0x20 [ 48.623140][ T411] default_idle_call+0x6d/0xb0 [ 48.623596][ T411] cpuidle_idle_call+0x1f4/0x280 [ 48.623892][ T411] do_idle+0xf9/0x160 [ 48.624119][ T411] cpu_startup_entry+0x54/0x60 [ 48.624404][ T411] start_secondary+0x21c/0x2b0 [ 48.624857][ T411] common_startup_64+0x12c/0x138 [ 48.625141][ T411] INITIAL USE at: [ 48.625324][ T411] __lock_acquire+0x797/0x1570 [ 48.625607][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.625887][ T411] _raw_write_lock_bh+0x38/0x50 [ 48.626168][ T411] addrconf_permanent_addr+0x6e/0x670 [ 48.626447][ T411] addrconf_notify+0x749/0xd60 [ 48.626726][ T411] notifier_call_chain+0xcd/0x150 [ 48.627018][ T411] __dev_notify_flags+0xe6/0x250 [ 48.627300][ T411] dev_change_flags+0xec/0x160 [ 48.627738][ T411] do_setlink+0x7d6/0x21e0 [ 48.628020][ T411] __rtnl_newlink+0xaa7/0xd80 [ 48.628302][ T411] rtnl_newlink+0x63/0xa0 [ 48.628584][ T411] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 48.628867][ T411] netlink_rcv_skb+0x130/0x360 [ 48.629162][ T411] netlink_unicast+0x449/0x710 [ 48.629440][ T411] netlink_sendmsg+0x723/0xbe0 [ 48.629719][ T411] ____sys_sendmsg+0x7b2/0xa10 [ 48.630004][ T411] ___sys_sendmsg+0xee/0x170 [ 48.630287][ T411] __sys_sendmsg+0xcd/0x170 [ 48.630569][ T411] do_syscall_64+0xc6/0x1e0 [ 48.631150][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.631497][ T411] INITIAL READ USE at: [ 48.631667][ T411] __lock_acquire+0x797/0x1570 [ 48.632096][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.632380][ T411] _raw_read_lock_bh+0x44/0x80 [ 48.632663][ T411] inet6_fill_ifla6_attrs+0x516/0x740 [ 48.633152][ T411] inet6_fill_link_af+0x5e/0xe0 [ 48.633457][ T411] rtnl_fill_ifinfo+0x1612/0x29e0 [ 48.633737][ T411] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 48.634074][ T411] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 48.634557][ T411] rtmsg_ifinfo+0x5b/0xa0 [ 48.634836][ T411] register_netdevice+0x1177/0x1690 [ 48.635181][ T411] register_netdev+0x20/0x40 [ 48.635610][ T411] sit_init_net+0x250/0x4f0 [ 48.635891][ T411] ops_init+0x9b/0x560 [ 48.636199][ T411] register_pernet_operations+0x2db/0x710 [ 48.636688][ T411] register_pernet_device+0x2a/0x60 [ 48.637020][ T411] sit_init+0x23/0xe0 [ 48.637310][ T411] do_one_initcall+0x8d/0x1e0 [ 48.637752][ T411] do_initcalls+0x1b2/0x3e0 [ 48.638040][ T411] kernel_init_freeable+0x232/0x310 [ 48.638377][ T411] kernel_init+0x20/0x200 [ 48.638668][ T411] ret_from_fork+0x31/0x70 [ 48.638956][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.639243][ T411] } [ 48.639357][ T411] ... key at: [] __key.37+0x0/0x40 [ 48.639853][ T411] [ 48.639853][ T411] the dependencies between the lock to be acquired [ 48.639856][ T411] and SOFTIRQ-irq-unsafe lock: [ 48.640455][ T411] -> (&p->alloc_lock){+.+.}-{2:2} { [ 48.640694][ T411] HARDIRQ-ON-W at: [ 48.640868][ T411] __lock_acquire+0x797/0x1570 [ 48.641156][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.641441][ T411] _raw_spin_lock+0x30/0x40 [ 48.641730][ T411] set_mems_allowed+0x1d/0x210 [ 48.642024][ T411] kernel_init_freeable+0x72/0x310 [ 48.642314][ T411] kernel_init+0x20/0x200 [ 48.642620][ T411] ret_from_fork+0x31/0x70 [ 48.643102][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.643409][ T411] SOFTIRQ-ON-W at: [ 48.643578][ T411] __lock_acquire+0x797/0x1570 [ 48.644007][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.644286][ T411] _raw_spin_lock+0x30/0x40 [ 48.644563][ T411] set_mems_allowed+0x1d/0x210 [ 48.644842][ T411] kernel_init_freeable+0x72/0x310 [ 48.645277][ T411] kernel_init+0x20/0x200 [ 48.645573][ T411] ret_from_fork+0x31/0x70 [ 48.645857][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.646294][ T411] INITIAL USE at: [ 48.646469][ T411] __lock_acquire+0x797/0x1570 [ 48.646761][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.647047][ T411] _raw_spin_lock+0x30/0x40 [ 48.647487][ T411] set_mems_allowed+0x1d/0x210 [ 48.647782][ T411] kernel_init_freeable+0x72/0x310 [ 48.648064][ T411] kernel_init+0x20/0x200 [ 48.648658][ T411] ret_from_fork+0x31/0x70 [ 48.648985][ T411] ret_from_fork_asm+0x1a/0x30 [ 48.649278][ T411] } [ 48.649403][ T411] ... key at: [] __key.387+0x0/0x40 [ 48.649770][ T411] ... acquired at: [ 48.649958][ T411] check_prev_add+0x194/0xce0 [ 48.650204][ T411] validate_chain+0x71d/0x9b0 [ 48.650445][ T411] __lock_acquire+0xaf0/0x1570 [ 48.650691][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.650943][ T411] _raw_spin_lock+0x30/0x40 [ 48.651176][ T411] __get_task_comm+0x27/0x70 [ 48.651429][ T411] ref_tracker_alloc+0x2ee/0x490 [ 48.651680][ T411] netdev_get_by_index+0x5e/0x80 [ 48.652083][ T411] fib6_nh_init+0x3d8/0x15b0 [ 48.652321][ T411] ip6_route_info_create+0xf18/0x17d0 [ 48.652548][ T411] addrconf_f6i_alloc+0x265/0x560 [ 48.652772][ T411] __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.653150][ T411] addrconf_join_anycast+0x1c0/0x220 [ 48.653385][ T411] dev_forward_change+0x2a6/0x7b0 [ 48.653612][ T411] addrconf_fixup_forwarding+0x23f/0x460 [ 48.653887][ T411] addrconf_sysctl_forward+0x212/0x2b0 [ 48.654271][ T411] proc_sys_call_handler+0x403/0x5e0 [ 48.654498][ T411] vfs_write+0x9e5/0x10a0 [ 48.654722][ T411] ksys_write+0xf5/0x1e0 [ 48.654943][ T411] do_syscall_64+0xc6/0x1e0 [ 48.655316][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.655589][ T411] [ 48.655707][ T411] [ 48.655707][ T411] stack backtrace: [ 48.655981][ T411] CPU: 1 PID: 411 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 48.656481][ T411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 48.656977][ T411] Call Trace: [ 48.657149][ T411] [ 48.657272][ T411] dump_stack_lvl+0x82/0xd0 [ 48.657660][ T411] print_bad_irq_dependency+0x957/0xd40 [ 48.657889][ T411] ? hlock_class+0x4e/0x130 [ 48.658119][ T411] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 48.658408][ T411] ? __pfx_usage_skip+0x10/0x10 [ 48.658783][ T411] ? __bfs+0x246/0x650 [ 48.658956][ T411] ? __pfx_usage_match+0x10/0x10 [ 48.659183][ T411] check_irq_usage+0x596/0x850 [ 48.659413][ T411] ? __pfx_check_irq_usage+0x10/0x10 [ 48.659639][ T411] ? __bfs+0x246/0x650 [ 48.659812][ T411] ? __pfx_hlock_conflict+0x10/0x10 [ 48.660036][ T411] ? check_path.constprop.0+0x24/0x50 [ 48.660269][ T411] ? check_noncircular+0x14c/0x3e0 [ 48.660494][ T411] ? __pfx_check_noncircular+0x10/0x10 [ 48.660729][ T411] ? check_prev_add+0x194/0xce0 [ 48.660951][ T411] check_prev_add+0x194/0xce0 [ 48.661181][ T411] ? validate_chain+0x130/0x9b0 [ 48.661409][ T411] validate_chain+0x71d/0x9b0 [ 48.661636][ T411] ? mark_lock+0x38/0x3e0 [ 48.661807][ T411] ? __pfx_validate_chain+0x10/0x10 [ 48.662042][ T411] ? hlock_class+0x4e/0x130 [ 48.662270][ T411] ? mark_lock+0x38/0x3e0 [ 48.662445][ T411] __lock_acquire+0xaf0/0x1570 [ 48.662834][ T411] lock_acquire.part.0+0xeb/0x330 [ 48.663061][ T411] ? __get_task_comm+0x27/0x70 [ 48.663304][ T411] ? mark_lock+0x38/0x3e0 [ 48.663475][ T411] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 48.663700][ T411] ? trace_lock_acquire+0x135/0x1c0 [ 48.663927][ T411] ? __get_task_comm+0x27/0x70 [ 48.664164][ T411] ? lock_acquire+0x32/0xc0 [ 48.664386][ T411] ? __get_task_comm+0x27/0x70 [ 48.664612][ T411] _raw_spin_lock+0x30/0x40 [ 48.664990][ T411] ? __get_task_comm+0x27/0x70 [ 48.665224][ T411] __get_task_comm+0x27/0x70 [ 48.665451][ T411] ref_tracker_alloc+0x2ee/0x490 [ 48.665680][ T411] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 48.666197][ T411] ? dev_get_by_index+0x177/0x270 [ 48.666423][ T411] ? netdev_get_by_index+0x5e/0x80 [ 48.666654][ T411] ? fib6_nh_init+0x3d8/0x15b0 [ 48.666880][ T411] ? ip6_route_info_create+0xf18/0x17d0 [ 48.667258][ T411] ? addrconf_f6i_alloc+0x265/0x560 [ 48.667482][ T411] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.667705][ T411] ? addrconf_join_anycast+0x1c0/0x220 [ 48.667932][ T411] ? dev_forward_change+0x2a6/0x7b0 [ 48.668311][ T411] ? addrconf_fixup_forwarding+0x23f/0x460 [ 48.668603][ T411] ? addrconf_sysctl_forward+0x212/0x2b0 [ 48.668832][ T411] ? proc_sys_call_handler+0x403/0x5e0 [ 48.669055][ T411] ? vfs_write+0x9e5/0x10a0 [ 48.669430][ T411] ? ksys_write+0xf5/0x1e0 [ 48.669663][ T411] ? do_syscall_64+0xc6/0x1e0 [ 48.669889][ T411] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.670173][ T411] ? dev_get_by_index+0x177/0x270 [ 48.670549][ T411] netdev_get_by_index+0x5e/0x80 [ 48.670783][ T411] fib6_nh_init+0x3d8/0x15b0 [ 48.671011][ T411] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 48.671288][ T411] ? __pfx_fib6_nh_init+0x10/0x10 [ 48.671665][ T411] ? kasan_save_track+0x14/0x30 [ 48.671923][ T411] ? __kasan_kmalloc+0x7f/0x90 [ 48.672155][ T411] ? __kmalloc+0x1d7/0x3c0 [ 48.672393][ T411] ? fib6_get_table+0x116/0x290 [ 48.672637][ T411] ip6_route_info_create+0xf18/0x17d0 [ 48.672879][ T411] ? __lock_release+0x103/0x460 [ 48.673132][ T411] ? __pfx_ip6_route_info_create+0x10/0x10 [ 48.673450][ T411] ? addrconf_f6i_alloc+0x12d/0x560 [ 48.673723][ T411] addrconf_f6i_alloc+0x265/0x560 [ 48.674104][ T411] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 48.674336][ T411] ? do_raw_write_lock+0x122/0x3b0 [ 48.674566][ T411] ? __pfx_do_raw_write_lock+0x10/0x10 [ 48.674786][ T411] ? lock_acquire+0x32/0xc0 [ 48.675168][ T411] __ipv6_dev_ac_inc+0x25f/0xb10 [ 48.675403][ T411] addrconf_join_anycast+0x1c0/0x220 [ 48.675620][ T411] ? mark_lock+0x38/0x3e0 [ 48.675792][ T411] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 48.676215][ T411] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 48.676497][ T411] dev_forward_change+0x2a6/0x7b0 [ 48.676752][ T411] ? __pfx_dev_forward_change+0x10/0x10 [ 48.676997][ T411] addrconf_fixup_forwarding+0x23f/0x460 [ 48.677395][ T411] addrconf_sysctl_forward+0x212/0x2b0 [ 48.677636][ T411] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 48.677939][ T411] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 48.678234][ T411] ? trace_kmalloc+0x2a/0xe0 [ 48.678617][ T411] ? __kmalloc_node+0x220/0x400 [ 48.678861][ T411] ? proc_sys_call_handler+0x30b/0x5e0 [ 48.679106][ T411] proc_sys_call_handler+0x403/0x5e0 [ 48.679356][ T411] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 48.679799][ T411] ? __lock_acquire+0xaf0/0x1570 [ 48.680034][ T411] vfs_write+0x9e5/0x10a0 [ 48.680217][ T411] ? do_user_addr_fault+0x449/0xbe0 [ 48.680457][ T411] ? __pfx_vfs_write+0x10/0x10 [ 48.680697][ T411] ? find_held_lock+0x2c/0x110 [ 48.680940][ T411] ? __pfx___lock_release+0x10/0x10 [ 48.681182][ T411] ? __fget_light+0x53/0x1e0 [ 48.681420][ T411] ksys_write+0xf5/0x1e0 [ 48.681606][ T411] ? __pfx_ksys_write+0x10/0x10 [ 48.681996][ T411] ? do_user_addr_fault+0x4bd/0xbe0 [ 48.682241][ T411] do_syscall_64+0xc6/0x1e0 [ 48.682483][ T411] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 48.682783][ T411] RIP: 0033:0x7f3a2cfdb957 [ 48.683184][ 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 [ 48.684057][ T411] RSP: 002b:00007fff76dd12f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 48.684704][ T411] RAX: ffffffffffffffda RBX: 000055eaf76ab360 RCX: 00007f3a2cfdb957 [ 48.685066][ T411] RDX: 0000000000000002 RSI: 000055eaf76ab3a0 RDI: 0000000000000005 [ 48.685578][ T411] RBP: 000055eaf76ad4d0 R08: 0000000000000003 R09: 0000000000000077 [ 48.685935][ T411] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 48.686291][ T411] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f3a2d0929c0 [ 48.686665][ T411] WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr