[ 30.157909][ T294] 8021q: 802.1Q VLAN Support v1.8 [ 31.347270][ T305] gre: GRE over IPv4 demultiplexor driver [ 31.363173][ T305] ip_gre: GRE over IPv4 tunneling driver [ 37.403182][ T362] GACT probability NOT on [ 38.937026][ T376] [ 38.937150][ T376] ===================================================== [ 38.937331][ T376] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 38.937547][ T376] 6.9.0-rc1-virtme #1 Not tainted [ 38.937697][ T376] ----------------------------------------------------- [ 38.937871][ T376] sysctl/376 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 38.938080][ T376] ffff8880052e2c28 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 38.938349][ T376] [ 38.938349][ T376] and this task is already holding: [ 38.938555][ T376] ffff888005e6a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 38.938816][ T376] which would create a new lock dependency: [ 38.938989][ T376] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 38.939204][ T376] [ 38.939204][ T376] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 38.939453][ T376] (&ndev->lock){++--}-{2:2} [ 38.939457][ T376] [ 38.939457][ T376] ... which became SOFTIRQ-irq-safe at: [ 38.939803][ T376] __lock_acquire+0x797/0x1570 [ 38.939948][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.940084][ T376] _raw_write_lock+0x30/0x40 [ 38.940229][ T376] addrconf_rs_timer+0xa9/0x730 [ 38.940373][ T376] call_timer_fn+0x13b/0x230 [ 38.940515][ T376] __run_timers+0x545/0x810 [ 38.940660][ T376] run_timer_softirq+0xe8/0x1b0 [ 38.940796][ T376] __do_softirq+0x1f8/0x5df [ 38.940931][ T376] irq_exit_rcu+0x97/0xc0 [ 38.941072][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.941217][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.941510][ T376] _raw_spin_unlock_irqrestore+0x43/0x70 [ 38.941649][ T376] get_partial_node.part.0+0x1c5/0x3a0 [ 38.941791][ T376] ___slab_alloc+0xb70/0x10a0 [ 38.941936][ T376] __kmalloc+0x34c/0x3c0 [ 38.942048][ T376] p9_fcall_init+0x7d/0x1b0 [ 38.942191][ T376] p9_tag_alloc+0x1bd/0x700 [ 38.942331][ T376] p9_client_prepare_req+0xe6/0x290 [ 38.942470][ T376] p9_client_rpc+0x18d/0x930 [ 38.942607][ T376] p9_client_getattr_dotl+0xb5/0x1a0 [ 38.942749][ T376] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 38.942888][ T376] ovl_getattr+0x46f/0xdd0 [ 38.943030][ T376] vfs_fstat+0x3b/0x80 [ 38.943146][ T376] __do_sys_newfstatat+0x6b/0xc0 [ 38.943288][ T376] do_syscall_64+0xc6/0x1e0 [ 38.943426][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.943600][ T376] [ 38.943600][ T376] to a SOFTIRQ-irq-unsafe lock: [ 38.943769][ T376] (&p->alloc_lock){+.+.}-{2:2} [ 38.943774][ T376] [ 38.943774][ T376] ... which became SOFTIRQ-irq-unsafe at: [ 38.944127][ T376] ... [ 38.944128][ T376] __lock_acquire+0x797/0x1570 [ 38.944340][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.944478][ T376] _raw_spin_lock+0x30/0x40 [ 38.944620][ T376] set_mems_allowed+0x1d/0x210 [ 38.944763][ T376] kernel_init_freeable+0x72/0x310 [ 38.944913][ T376] kernel_init+0x20/0x200 [ 38.945055][ T376] ret_from_fork+0x31/0x70 [ 38.945207][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.945353][ T376] [ 38.945353][ T376] other info that might help us debug this: [ 38.945353][ T376] [ 38.945633][ T376] Possible interrupt unsafe locking scenario: [ 38.945633][ T376] [ 38.945840][ T376] CPU0 CPU1 [ 38.945989][ T376] ---- ---- [ 38.946133][ T376] lock(&p->alloc_lock); [ 38.946242][ T376] local_irq_disable(); [ 38.946423][ T376] lock(&ndev->lock); [ 38.946597][ T376] lock(&p->alloc_lock); [ 38.946779][ T376] [ 38.946885][ T376] lock(&ndev->lock); [ 38.946993][ T376] [ 38.946993][ T376] *** DEADLOCK *** [ 38.946993][ T376] [ 38.947200][ T376] 3 locks held by sysctl/376: [ 38.947350][ T376] #0: ffff8880060a13f0 (sb_writers#7){.+.+}-{0:0}, at: ksys_write+0xf5/0x1e0 [ 38.947617][ T376] #1: ffffffffa4b969c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_fixup_forwarding+0x20/0x460 [ 38.947914][ T376] #2: ffff888005e6a580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 38.948167][ T376] [ 38.948167][ T376] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 38.948441][ T376] -> (&ndev->lock){++--}-{2:2} { [ 38.948588][ T376] HARDIRQ-ON-W at: [ 38.948705][ T376] __lock_acquire+0x797/0x1570 [ 38.948882][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.949062][ T376] _raw_write_lock_bh+0x38/0x50 [ 38.949251][ T376] addrconf_permanent_addr+0x6e/0x670 [ 38.949425][ T376] addrconf_notify+0x749/0xd60 [ 38.949603][ T376] notifier_call_chain+0xcd/0x150 [ 38.949787][ T376] __dev_notify_flags+0xe6/0x250 [ 38.949966][ T376] dev_change_flags+0xec/0x160 [ 38.950148][ T376] do_setlink+0x7d6/0x21e0 [ 38.950323][ T376] __rtnl_newlink+0xaa7/0xd80 [ 38.950509][ T376] rtnl_newlink+0x63/0xa0 [ 38.950689][ T376] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 38.950876][ T376] netlink_rcv_skb+0x130/0x360 [ 38.951061][ T376] netlink_unicast+0x449/0x710 [ 38.951239][ T376] netlink_sendmsg+0x723/0xbe0 [ 38.951424][ T376] ____sys_sendmsg+0x7b2/0xa10 [ 38.951602][ T376] ___sys_sendmsg+0xee/0x170 [ 38.951785][ T376] __sys_sendmsg+0xcd/0x170 [ 38.951963][ T376] do_syscall_64+0xc6/0x1e0 [ 38.952150][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.952364][ T376] HARDIRQ-ON-R at: [ 38.952470][ T376] __lock_acquire+0x797/0x1570 [ 38.952655][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.952832][ T376] _raw_read_lock_bh+0x44/0x80 [ 38.953018][ T376] inet6_fill_ifla6_attrs+0x516/0x740 [ 38.953200][ T376] inet6_fill_link_af+0x5e/0xe0 [ 38.953382][ T376] rtnl_fill_ifinfo+0x1612/0x29e0 [ 38.953564][ T376] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 38.953750][ T376] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 38.953966][ T376] rtmsg_ifinfo+0x5b/0xa0 [ 38.954146][ T376] register_netdevice+0x1177/0x1690 [ 38.954327][ T376] register_netdev+0x20/0x40 [ 38.954513][ T376] sit_init_net+0x250/0x4f0 [ 38.954700][ T376] ops_init+0x9b/0x560 [ 38.954848][ T376] register_pernet_operations+0x2db/0x710 [ 38.955058][ T376] register_pernet_device+0x2a/0x60 [ 38.955238][ T376] sit_init+0x23/0xe0 [ 38.955390][ T376] do_one_initcall+0x8d/0x1e0 [ 38.955575][ T376] do_initcalls+0x1b2/0x3e0 [ 38.955755][ T376] kernel_init_freeable+0x232/0x310 [ 38.955933][ T376] kernel_init+0x20/0x200 [ 38.956114][ T376] ret_from_fork+0x31/0x70 [ 38.956291][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.956471][ T376] IN-SOFTIRQ-W at: [ 38.956582][ T376] __lock_acquire+0x797/0x1570 [ 38.956769][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.956946][ T376] _raw_write_lock+0x30/0x40 [ 38.957120][ T376] addrconf_rs_timer+0xa9/0x730 [ 38.957301][ T376] call_timer_fn+0x13b/0x230 [ 38.957485][ T376] __run_timers+0x545/0x810 [ 38.957666][ T376] run_timer_softirq+0xe8/0x1b0 [ 38.957845][ T376] __do_softirq+0x1f8/0x5df [ 38.958022][ T376] irq_exit_rcu+0x97/0xc0 [ 38.958195][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.958409][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.958624][ T376] _raw_spin_unlock_irqrestore+0x43/0x70 [ 38.958837][ T376] get_partial_node.part.0+0x1c5/0x3a0 [ 38.959018][ T376] ___slab_alloc+0xb70/0x10a0 [ 38.959194][ T376] __kmalloc+0x34c/0x3c0 [ 38.959386][ T376] p9_fcall_init+0x7d/0x1b0 [ 38.959568][ T376] p9_tag_alloc+0x1bd/0x700 [ 38.959833][ T376] p9_client_prepare_req+0xe6/0x290 [ 38.960004][ T376] p9_client_rpc+0x18d/0x930 [ 38.960181][ T376] p9_client_getattr_dotl+0xb5/0x1a0 [ 38.960360][ T376] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 38.960539][ T376] ovl_getattr+0x46f/0xdd0 [ 38.960718][ T376] vfs_fstat+0x3b/0x80 [ 38.960865][ T376] __do_sys_newfstatat+0x6b/0xc0 [ 38.961133][ T376] do_syscall_64+0xc6/0x1e0 [ 38.961314][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.961542][ T376] IN-SOFTIRQ-R at: [ 38.961656][ T376] __lock_acquire+0x797/0x1570 [ 38.961925][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.962105][ T376] _raw_read_lock_bh+0x44/0x80 [ 38.962288][ T376] ipv6_get_lladdr+0xa9/0x3e0 [ 38.962468][ T376] addrconf_rs_timer+0x24a/0x730 [ 38.962649][ T376] call_timer_fn+0x13b/0x230 [ 38.962833][ T376] __run_timers+0x545/0x810 [ 38.963095][ T376] run_timer_softirq+0xe8/0x1b0 [ 38.963280][ T376] __do_softirq+0x1f8/0x5df [ 38.963459][ T376] irq_exit_rcu+0x97/0xc0 [ 38.963638][ T376] sysvec_apic_timer_interrupt+0x75/0x80 [ 38.963939][ T376] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 38.964162][ T376] _raw_spin_unlock_irqrestore+0x43/0x70 [ 38.964379][ T376] get_partial_node.part.0+0x1c5/0x3a0 [ 38.964563][ T376] ___slab_alloc+0xb70/0x10a0 [ 38.964740][ T376] __kmalloc+0x34c/0x3c0 [ 38.964922][ T376] p9_fcall_init+0x7d/0x1b0 [ 38.965273][ T376] p9_tag_alloc+0x1bd/0x700 [ 38.965455][ T376] p9_client_prepare_req+0xe6/0x290 [ 38.965650][ T376] p9_client_rpc+0x18d/0x930 [ 38.965911][ T376] p9_client_getattr_dotl+0xb5/0x1a0 [ 38.966086][ T376] v9fs_vfs_getattr_dotl+0x11a/0x370 [ 38.966259][ T376] ovl_getattr+0x46f/0xdd0 [ 38.966434][ T376] vfs_fstat+0x3b/0x80 [ 38.966667][ T376] __do_sys_newfstatat+0x6b/0xc0 [ 38.966847][ T376] do_syscall_64+0xc6/0x1e0 [ 38.967027][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.967315][ T376] INITIAL USE at: [ 38.967422][ T376] __lock_acquire+0x797/0x1570 [ 38.967596][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.967771][ T376] _raw_write_lock_bh+0x38/0x50 [ 38.968036][ T376] addrconf_permanent_addr+0x6e/0x670 [ 38.968217][ T376] addrconf_notify+0x749/0xd60 [ 38.968389][ T376] notifier_call_chain+0xcd/0x150 [ 38.968652][ T376] __dev_notify_flags+0xe6/0x250 [ 38.968827][ T376] dev_change_flags+0xec/0x160 [ 38.968999][ T376] do_setlink+0x7d6/0x21e0 [ 38.969177][ T376] __rtnl_newlink+0xaa7/0xd80 [ 38.969443][ T376] rtnl_newlink+0x63/0xa0 [ 38.969618][ T376] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 38.969790][ T376] netlink_rcv_skb+0x130/0x360 [ 38.970058][ T376] netlink_unicast+0x449/0x710 [ 38.970238][ T376] netlink_sendmsg+0x723/0xbe0 [ 38.970417][ T376] ____sys_sendmsg+0x7b2/0xa10 [ 38.970608][ T376] ___sys_sendmsg+0xee/0x170 [ 38.970881][ T376] __sys_sendmsg+0xcd/0x170 [ 38.971061][ T376] do_syscall_64+0xc6/0x1e0 [ 38.971247][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.971481][ T376] INITIAL READ USE at: [ 38.971600][ T376] __lock_acquire+0x797/0x1570 [ 38.971774][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.971964][ T376] _raw_read_lock_bh+0x44/0x80 [ 38.972286][ T376] inet6_fill_ifla6_attrs+0x516/0x740 [ 38.972519][ T376] inet6_fill_link_af+0x5e/0xe0 [ 38.972717][ T376] rtnl_fill_ifinfo+0x1612/0x29e0 [ 38.973011][ T376] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 38.973224][ T376] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 38.973448][ T376] rtmsg_ifinfo+0x5b/0xa0 [ 38.973710][ T376] register_netdevice+0x1177/0x1690 [ 38.973929][ T376] register_netdev+0x20/0x40 [ 38.974135][ T376] sit_init_net+0x250/0x4f0 [ 38.974413][ T376] ops_init+0x9b/0x560 [ 38.974609][ T376] register_pernet_operations+0x2db/0x710 [ 38.974854][ T376] register_pernet_device+0x2a/0x60 [ 38.975163][ T376] sit_init+0x23/0xe0 [ 38.975354][ T376] do_one_initcall+0x8d/0x1e0 [ 38.975560][ T376] do_initcalls+0x1b2/0x3e0 [ 38.975849][ T376] kernel_init_freeable+0x232/0x310 [ 38.976092][ T376] kernel_init+0x20/0x200 [ 38.976268][ T376] ret_from_fork+0x31/0x70 [ 38.976445][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.976787][ T376] } [ 38.976870][ T376] ... key at: [] __key.37+0x0/0x40 [ 38.977084][ T376] [ 38.977084][ T376] the dependencies between the lock to be acquired [ 38.977086][ T376] and SOFTIRQ-irq-unsafe lock: [ 38.977558][ T376] -> (&p->alloc_lock){+.+.}-{2:2} { [ 38.977709][ T376] HARDIRQ-ON-W at: [ 38.977829][ T376] __lock_acquire+0x797/0x1570 [ 38.978092][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.978266][ T376] _raw_spin_lock+0x30/0x40 [ 38.978454][ T376] set_mems_allowed+0x1d/0x210 [ 38.978636][ T376] kernel_init_freeable+0x72/0x310 [ 38.978915][ T376] kernel_init+0x20/0x200 [ 38.979097][ T376] ret_from_fork+0x31/0x70 [ 38.979279][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.979459][ T376] SOFTIRQ-ON-W at: [ 38.979569][ T376] __lock_acquire+0x797/0x1570 [ 38.979749][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.979925][ T376] _raw_spin_lock+0x30/0x40 [ 38.980201][ T376] set_mems_allowed+0x1d/0x210 [ 38.980384][ T376] kernel_init_freeable+0x72/0x310 [ 38.980571][ T376] kernel_init+0x20/0x200 [ 38.980842][ T376] ret_from_fork+0x31/0x70 [ 38.981016][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.981202][ T376] INITIAL USE at: [ 38.981307][ T376] __lock_acquire+0x797/0x1570 [ 38.981577][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.981759][ T376] _raw_spin_lock+0x30/0x40 [ 38.981942][ T376] set_mems_allowed+0x1d/0x210 [ 38.982207][ T376] kernel_init_freeable+0x72/0x310 [ 38.982395][ T376] kernel_init+0x20/0x200 [ 38.982570][ T376] ret_from_fork+0x31/0x70 [ 38.982753][ T376] ret_from_fork_asm+0x1a/0x30 [ 38.983019][ T376] } [ 38.983102][ T376] ... key at: [] __key.387+0x0/0x40 [ 38.983316][ T376] ... acquired at: [ 38.983419][ T376] check_prev_add+0x194/0xce0 [ 38.983648][ T376] validate_chain+0x71d/0x9b0 [ 38.983792][ T376] __lock_acquire+0xaf0/0x1570 [ 38.983938][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.984085][ T376] _raw_spin_lock+0x30/0x40 [ 38.984315][ T376] __get_task_comm+0x27/0x70 [ 38.984457][ T376] ref_tracker_alloc+0x2ee/0x490 [ 38.984604][ T376] netdev_get_by_index+0x5e/0x80 [ 38.984744][ T376] fib6_nh_init+0x3d8/0x15b0 [ 38.984884][ T376] ip6_route_info_create+0xf18/0x17d0 [ 38.985106][ T376] addrconf_f6i_alloc+0x265/0x560 [ 38.985247][ T376] __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.985400][ T376] addrconf_join_anycast+0x1c0/0x220 [ 38.985538][ T376] dev_forward_change+0x2a6/0x7b0 [ 38.985754][ T376] addrconf_fixup_forwarding+0x23f/0x460 [ 38.985937][ T376] addrconf_sysctl_forward+0x212/0x2b0 [ 38.986081][ T376] proc_sys_call_handler+0x403/0x5e0 [ 38.986229][ T376] vfs_write+0x9e5/0x10a0 [ 38.986451][ T376] ksys_write+0xf5/0x1e0 [ 38.986589][ T376] do_syscall_64+0xc6/0x1e0 [ 38.986746][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.986927][ T376] [ 38.987084][ T376] [ 38.987084][ T376] stack backtrace: [ 38.987257][ T376] CPU: 1 PID: 376 Comm: sysctl Not tainted 6.9.0-rc1-virtme #1 [ 38.987481][ T376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 38.987890][ T376] Call Trace: [ 38.988001][ T376] [ 38.988078][ T376] dump_stack_lvl+0x82/0xd0 [ 38.988232][ T376] print_bad_irq_dependency+0x957/0xd40 [ 38.988377][ T376] ? hlock_class+0x4e/0x130 [ 38.988522][ T376] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 38.988699][ T376] ? __pfx_usage_skip+0x10/0x10 [ 38.988842][ T376] ? __bfs+0x246/0x650 [ 38.988947][ T376] ? __pfx_usage_match+0x10/0x10 [ 38.989175][ T376] check_irq_usage+0x596/0x850 [ 38.989321][ T376] ? __pfx_check_irq_usage+0x10/0x10 [ 38.989473][ T376] ? __bfs+0x246/0x650 [ 38.989583][ T376] ? __pfx_hlock_conflict+0x10/0x10 [ 38.989818][ T376] ? check_path.constprop.0+0x24/0x50 [ 38.989960][ T376] ? check_noncircular+0x14c/0x3e0 [ 38.990106][ T376] ? __pfx_check_noncircular+0x10/0x10 [ 38.990247][ T376] ? check_prev_add+0x194/0xce0 [ 38.990402][ T376] check_prev_add+0x194/0xce0 [ 38.990554][ T376] ? validate_chain+0x130/0x9b0 [ 38.990701][ T376] validate_chain+0x71d/0x9b0 [ 38.990854][ T376] ? mark_lock+0x38/0x3e0 [ 38.990961][ T376] ? __pfx_validate_chain+0x10/0x10 [ 38.991180][ T376] ? hlock_class+0x4e/0x130 [ 38.991316][ T376] ? mark_lock+0x38/0x3e0 [ 38.991459][ T376] __lock_acquire+0xaf0/0x1570 [ 38.991602][ T376] lock_acquire.part.0+0xeb/0x330 [ 38.991742][ T376] ? __get_task_comm+0x27/0x70 [ 38.991978][ T376] ? mark_lock+0x38/0x3e0 [ 38.992093][ T376] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 38.992231][ T376] ? trace_lock_acquire+0x135/0x1c0 [ 38.992376][ T376] ? __get_task_comm+0x27/0x70 [ 38.992605][ T376] ? lock_acquire+0x32/0xc0 [ 38.992752][ T376] ? __get_task_comm+0x27/0x70 [ 38.992889][ T376] _raw_spin_lock+0x30/0x40 [ 38.993027][ T376] ? __get_task_comm+0x27/0x70 [ 38.993257][ T376] __get_task_comm+0x27/0x70 [ 38.993401][ T376] ref_tracker_alloc+0x2ee/0x490 [ 38.993544][ T376] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 38.993683][ T376] ? dev_get_by_index+0x177/0x270 [ 38.993832][ T376] ? netdev_get_by_index+0x5e/0x80 [ 38.994065][ T376] ? fib6_nh_init+0x3d8/0x15b0 [ 38.994206][ T376] ? ip6_route_info_create+0xf18/0x17d0 [ 38.994344][ T376] ? addrconf_f6i_alloc+0x265/0x560 [ 38.994481][ T376] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.994717][ T376] ? addrconf_join_anycast+0x1c0/0x220 [ 38.994857][ T376] ? dev_forward_change+0x2a6/0x7b0 [ 38.994998][ T376] ? addrconf_fixup_forwarding+0x23f/0x460 [ 38.995169][ T376] ? addrconf_sysctl_forward+0x212/0x2b0 [ 38.995399][ T376] ? proc_sys_call_handler+0x403/0x5e0 [ 38.995548][ T376] ? vfs_write+0x9e5/0x10a0 [ 38.995692][ T376] ? ksys_write+0xf5/0x1e0 [ 38.995839][ T376] ? do_syscall_64+0xc6/0x1e0 [ 38.996068][ T376] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 38.996247][ T376] ? dev_get_by_index+0x177/0x270 [ 38.996389][ T376] netdev_get_by_index+0x5e/0x80 [ 38.996531][ T376] fib6_nh_init+0x3d8/0x15b0 [ 38.996759][ T376] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 38.996932][ T376] ? __pfx_fib6_nh_init+0x10/0x10 [ 38.997073][ T376] ? kasan_save_track+0x14/0x30 [ 38.997218][ T376] ? __kasan_kmalloc+0x7f/0x90 [ 38.997369][ T376] ? __kmalloc+0x1d7/0x3c0 [ 38.997516][ T376] ? fib6_get_table+0x116/0x290 [ 38.997663][ T376] ip6_route_info_create+0xf18/0x17d0 [ 38.997799][ T376] ? __lock_release+0x103/0x460 [ 38.998029][ T376] ? __pfx_ip6_route_info_create+0x10/0x10 [ 38.998209][ T376] ? addrconf_f6i_alloc+0x12d/0x560 [ 38.998351][ T376] addrconf_f6i_alloc+0x265/0x560 [ 38.998496][ T376] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 38.998818][ T376] ? do_raw_write_lock+0x122/0x3b0 [ 38.998960][ T376] ? __pfx_do_raw_write_lock+0x10/0x10 [ 38.999095][ T376] ? lock_acquire+0x32/0xc0 [ 38.999236][ T376] __ipv6_dev_ac_inc+0x25f/0xb10 [ 38.999387][ T376] addrconf_join_anycast+0x1c0/0x220 [ 38.999533][ T376] ? mark_lock+0x38/0x3e0 [ 38.999640][ T376] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 38.999812][ T376] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 38.999991][ T376] dev_forward_change+0x2a6/0x7b0 [ 39.000221][ T376] ? __pfx_dev_forward_change+0x10/0x10 [ 39.000367][ T376] addrconf_fixup_forwarding+0x23f/0x460 [ 39.000509][ T376] addrconf_sysctl_forward+0x212/0x2b0 [ 39.000655][ T376] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 39.000922][ T376] ? __pfx_addrconf_sysctl_forward+0x10/0x10 [ 39.001095][ T376] ? trace_kmalloc+0x2a/0xe0 [ 39.001234][ T376] ? __kmalloc_node+0x220/0x400 [ 39.001382][ T376] ? proc_sys_call_handler+0x30b/0x5e0 [ 39.001531][ T376] proc_sys_call_handler+0x403/0x5e0 [ 39.001669][ T376] ? __pfx_proc_sys_call_handler+0x10/0x10 [ 39.001836][ T376] ? __lock_acquire+0xaf0/0x1570 [ 39.001983][ T376] vfs_write+0x9e5/0x10a0 [ 39.002088][ T376] ? do_user_addr_fault+0x449/0xbe0 [ 39.002231][ T376] ? __pfx_vfs_write+0x10/0x10 [ 39.002375][ T376] ? find_held_lock+0x2c/0x110 [ 39.002513][ T376] ? __pfx___lock_release+0x10/0x10 [ 39.002741][ T376] ? __fget_light+0x53/0x1e0 [ 39.002882][ T376] ksys_write+0xf5/0x1e0 [ 39.002986][ T376] ? __pfx_ksys_write+0x10/0x10 [ 39.003122][ T376] ? do_user_addr_fault+0x4bd/0xbe0 [ 39.003267][ T376] do_syscall_64+0xc6/0x1e0 [ 39.003491][ T376] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.003670][ T376] RIP: 0033:0x7f8dfde37957 [ 39.003819][ T376] 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 [ 39.004412][ T376] RSP: 002b:00007ffe0c534738 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 39.004629][ T376] RAX: ffffffffffffffda RBX: 000055fa3f593360 RCX: 00007f8dfde37957 [ 39.004937][ T376] RDX: 0000000000000002 RSI: 000055fa3f5933a0 RDI: 0000000000000005 [ 39.005151][ T376] RBP: 000055fa3f5954d0 R08: 0000000000000003 R09: 0000000000000077 [ 39.005365][ T376] R10: 000000000000006b R11: 0000000000000246 R12: 0000000000000002 [ 39.005582][ T376] R13: 0000000000000002 R14: 0000000000000002 R15: 00007f8dfdeee9c0 [ 39.005805][ T376]