[ 166.100884][ T72] [ 166.100998][ T72] ===================================================== [ 166.101169][ T72] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 166.101374][ T72] 6.9.0-rc1-virtme #1 Not tainted [ 166.101515][ T72] ----------------------------------------------------- [ 166.101686][ T72] kworker/u16:1/72 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: [ 166.101892][ T72] ffff888004e0cee8 (&p->alloc_lock){+.+.}-{2:2}, at: __get_task_comm+0x27/0x70 [ 166.102153][ T72] [ 166.102153][ T72] and this task is already holding: [ 166.102362][ T72] ffff88800829d580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 166.102602][ T72] which would create a new lock dependency: [ 166.102764][ T72] (&ndev->lock){++--}-{2:2} -> (&p->alloc_lock){+.+.}-{2:2} [ 166.102965][ T72] [ 166.102965][ T72] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 166.103186][ T72] (&ndev->lock){++--}-{2:2} [ 166.103190][ T72] [ 166.103190][ T72] ... which became SOFTIRQ-irq-safe at: [ 166.103516][ T72] __lock_acquire+0x797/0x1570 [ 166.103658][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.103790][ T72] _raw_write_lock+0x30/0x40 [ 166.103923][ T72] addrconf_rs_timer+0xa9/0x730 [ 166.104056][ T72] call_timer_fn+0x13b/0x230 [ 166.104192][ T72] __run_timers+0x545/0x810 [ 166.104323][ T72] run_timer_softirq+0xe8/0x1b0 [ 166.104453][ T72] __do_softirq+0x1f8/0x5df [ 166.104586][ T72] irq_exit_rcu+0x97/0xc0 [ 166.104722][ T72] sysvec_apic_timer_interrupt+0x75/0x80 [ 166.104855][ T72] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 166.105022][ T72] unwind_next_frame+0x965/0x1d00 [ 166.105157][ T72] arch_stack_walk+0x8c/0xf0 [ 166.105289][ T72] stack_trace_save+0x94/0xd0 [ 166.105422][ T72] kasan_save_stack+0x24/0x50 [ 166.105555][ T72] kasan_save_track+0x14/0x30 [ 166.105686][ T72] kasan_save_free_info+0x3b/0x60 [ 166.105826][ T72] __kasan_slab_free+0xf4/0x180 [ 166.105957][ T72] kmem_cache_free+0xd7/0x220 [ 166.106089][ T72] unlink_anon_vmas+0x167/0x920 [ 166.106223][ T72] free_pgtables+0x290/0x7b0 [ 166.106356][ T72] exit_mmap+0x2d4/0x7d0 [ 166.106456][ T72] __mmput+0x76/0x3b0 [ 166.106555][ T72] exit_mm+0x146/0x1d0 [ 166.106659][ T72] do_exit+0x6b6/0xcf0 [ 166.106759][ T72] do_group_exit+0xb8/0x260 [ 166.106897][ T72] __x64_sys_exit_group+0x3e/0x50 [ 166.107028][ T72] do_syscall_64+0xc6/0x1e0 [ 166.107158][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 166.107319][ T72] [ 166.107319][ T72] to a SOFTIRQ-irq-unsafe lock: [ 166.107486][ T72] (&p->alloc_lock){+.+.}-{2:2} [ 166.107490][ T72] [ 166.107490][ T72] ... which became SOFTIRQ-irq-unsafe at: [ 166.107808][ T72] ... [ 166.107809][ T72] __lock_acquire+0x797/0x1570 [ 166.108016][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.108147][ T72] _raw_spin_lock+0x30/0x40 [ 166.108282][ T72] set_mems_allowed+0x1d/0x210 [ 166.108415][ T72] kernel_init_freeable+0x72/0x310 [ 166.108550][ T72] kernel_init+0x20/0x200 [ 166.108681][ T72] ret_from_fork+0x31/0x70 [ 166.108813][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.108944][ T72] [ 166.108944][ T72] other info that might help us debug this: [ 166.108944][ T72] [ 166.109207][ T72] Possible interrupt unsafe locking scenario: [ 166.109207][ T72] [ 166.109401][ T72] CPU0 CPU1 [ 166.109531][ T72] ---- ---- [ 166.109664][ T72] lock(&p->alloc_lock); [ 166.109766][ T72] local_irq_disable(); [ 166.109931][ T72] lock(&ndev->lock); [ 166.110105][ T72] lock(&p->alloc_lock); [ 166.110282][ T72] [ 166.110386][ T72] lock(&ndev->lock); [ 166.110491][ T72] [ 166.110491][ T72] *** DEADLOCK *** [ 166.110491][ T72] [ 166.110684][ T72] 4 locks held by kworker/u16:1/72: [ 166.110828][ T72] #0: ffff8880053e3548 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0xda6/0x1730 [ 166.111108][ T72] #1: ffffc900004dfda0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0xde2/0x1730 [ 166.111408][ T72] #2: ffffffffab7b7208 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xaf/0xab0 [ 166.111645][ T72] #3: ffff88800829d580 (&ndev->lock){++--}-{2:2}, at: __ipv6_dev_ac_inc+0x42/0xb10 [ 166.111879][ T72] [ 166.111879][ T72] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 166.112146][ T72] -> (&ndev->lock){++--}-{2:2} { [ 166.112285][ T72] HARDIRQ-ON-W at: [ 166.112387][ T72] __lock_acquire+0x797/0x1570 [ 166.112562][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.112729][ T72] _raw_write_lock_bh+0x38/0x50 [ 166.112895][ T72] addrconf_permanent_addr+0x6e/0x670 [ 166.113066][ T72] addrconf_notify+0x749/0xd60 [ 166.113317][ T72] notifier_call_chain+0xcd/0x150 [ 166.113485][ T72] __dev_notify_flags+0xe6/0x250 [ 166.113652][ T72] dev_change_flags+0xec/0x160 [ 166.113896][ T72] do_setlink+0x7d6/0x21e0 [ 166.114061][ T72] __rtnl_newlink+0xaa7/0xd80 [ 166.114231][ T72] rtnl_newlink+0x63/0xa0 [ 166.114400][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 166.114723][ T72] netlink_rcv_skb+0x130/0x360 [ 166.114890][ T72] netlink_unicast+0x449/0x710 [ 166.115056][ T72] netlink_sendmsg+0x723/0xbe0 [ 166.115300][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 166.115470][ T72] ___sys_sendmsg+0xee/0x170 [ 166.115641][ T72] __sys_sendmsg+0xcd/0x170 [ 166.115807][ T72] do_syscall_64+0xc6/0x1e0 [ 166.116052][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 166.116250][ T72] HARDIRQ-ON-R at: [ 166.116357][ T72] __lock_acquire+0x797/0x1570 [ 166.116601][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.116767][ T72] _raw_read_lock_bh+0x44/0x80 [ 166.116938][ T72] inet6_fill_ifla6_attrs+0x516/0x740 [ 166.117105][ T72] inet6_fill_link_af+0x5e/0xe0 [ 166.117358][ T72] rtnl_fill_ifinfo+0x1615/0x2a90 [ 166.117524][ T72] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 166.117690][ T72] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 166.117974][ T72] rtmsg_ifinfo+0x5b/0xa0 [ 166.118140][ T72] register_netdevice+0x1177/0x1690 [ 166.118308][ T72] register_netdev+0x20/0x40 [ 166.118553][ T72] vti6_init_net+0x25d/0x380 [ 166.118722][ T72] ops_init+0x9b/0x560 [ 166.118855][ T72] register_pernet_operations+0x2db/0x710 [ 166.119051][ T72] register_pernet_device+0x2a/0x60 [ 166.119302][ T72] vti6_tunnel_init+0x18/0x110 [ 166.119469][ T72] do_one_initcall+0x8d/0x1e0 [ 166.119636][ T72] do_initcalls+0x1b2/0x3e0 [ 166.119881][ T72] kernel_init_freeable+0x232/0x310 [ 166.120047][ T72] kernel_init+0x20/0x200 [ 166.120215][ T72] ret_from_fork+0x31/0x70 [ 166.120468][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.120635][ T72] IN-SOFTIRQ-W at: [ 166.120735][ T72] __lock_acquire+0x797/0x1570 [ 166.120908][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.121155][ T72] _raw_write_lock+0x30/0x40 [ 166.121322][ T72] addrconf_rs_timer+0xa9/0x730 [ 166.121488][ T72] call_timer_fn+0x13b/0x230 [ 166.121661][ T72] __run_timers+0x545/0x810 [ 166.121906][ T72] run_timer_softirq+0xe8/0x1b0 [ 166.122076][ T72] __do_softirq+0x1f8/0x5df [ 166.122243][ T72] irq_exit_rcu+0x97/0xc0 [ 166.122489][ T72] sysvec_apic_timer_interrupt+0x75/0x80 [ 166.122689][ T72] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 166.122892][ T72] unwind_next_frame+0x965/0x1d00 [ 166.123141][ T72] arch_stack_walk+0x8c/0xf0 [ 166.123308][ T72] stack_trace_save+0x94/0xd0 [ 166.123474][ T72] kasan_save_stack+0x24/0x50 [ 166.123733][ T72] kasan_save_track+0x14/0x30 [ 166.123900][ T72] kasan_save_free_info+0x3b/0x60 [ 166.124069][ T72] __kasan_slab_free+0xf4/0x180 [ 166.124238][ T72] kmem_cache_free+0xd7/0x220 [ 166.124404][ T72] unlink_anon_vmas+0x167/0x920 [ 166.124572][ T72] free_pgtables+0x290/0x7b0 [ 166.124737][ T72] exit_mmap+0x2d4/0x7d0 [ 166.125066][ T72] __mmput+0x76/0x3b0 [ 166.125200][ T72] exit_mm+0x146/0x1d0 [ 166.125340][ T72] do_exit+0x6b6/0xcf0 [ 166.125475][ T72] do_group_exit+0xb8/0x260 [ 166.125728][ T72] __x64_sys_exit_group+0x3e/0x50 [ 166.125895][ T72] do_syscall_64+0xc6/0x1e0 [ 166.126064][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 166.126264][ T72] IN-SOFTIRQ-R at: [ 166.126365][ T72] __lock_acquire+0x797/0x1570 [ 166.126535][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.126701][ T72] _raw_read_lock_bh+0x44/0x80 [ 166.126950][ T72] ipv6_get_lladdr+0xa9/0x3e0 [ 166.127115][ T72] addrconf_rs_timer+0x24a/0x730 [ 166.127281][ T72] call_timer_fn+0x13b/0x230 [ 166.127447][ T72] __run_timers+0x545/0x810 [ 166.127691][ T72] run_timer_softirq+0xe8/0x1b0 [ 166.127867][ T72] __do_softirq+0x1f8/0x5df [ 166.128033][ T72] irq_exit_rcu+0x97/0xc0 [ 166.128276][ T72] sysvec_apic_timer_interrupt+0x75/0x80 [ 166.128475][ T72] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 166.128681][ T72] unwind_next_frame+0x965/0x1d00 [ 166.128926][ T72] arch_stack_walk+0x8c/0xf0 [ 166.129096][ T72] stack_trace_save+0x94/0xd0 [ 166.129262][ T72] kasan_save_stack+0x24/0x50 [ 166.129506][ T72] kasan_save_track+0x14/0x30 [ 166.129683][ T72] kasan_save_free_info+0x3b/0x60 [ 166.129848][ T72] __kasan_slab_free+0xf4/0x180 [ 166.130014][ T72] kmem_cache_free+0xd7/0x220 [ 166.130262][ T72] unlink_anon_vmas+0x167/0x920 [ 166.130428][ T72] free_pgtables+0x290/0x7b0 [ 166.130596][ T72] exit_mmap+0x2d4/0x7d0 [ 166.130847][ T72] __mmput+0x76/0x3b0 [ 166.130987][ T72] exit_mm+0x146/0x1d0 [ 166.131120][ T72] do_exit+0x6b6/0xcf0 [ 166.131254][ T72] do_group_exit+0xb8/0x260 [ 166.131505][ T72] __x64_sys_exit_group+0x3e/0x50 [ 166.131675][ T72] do_syscall_64+0xc6/0x1e0 [ 166.131840][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 166.132117][ T72] INITIAL USE at: [ 166.132218][ T72] __lock_acquire+0x797/0x1570 [ 166.132384][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.132566][ T72] _raw_write_lock_bh+0x38/0x50 [ 166.132812][ T72] addrconf_permanent_addr+0x6e/0x670 [ 166.132979][ T72] addrconf_notify+0x749/0xd60 [ 166.133146][ T72] notifier_call_chain+0xcd/0x150 [ 166.133314][ T72] __dev_notify_flags+0xe6/0x250 [ 166.133562][ T72] dev_change_flags+0xec/0x160 [ 166.133728][ T72] do_setlink+0x7d6/0x21e0 [ 166.133897][ T72] __rtnl_newlink+0xaa7/0xd80 [ 166.134143][ T72] rtnl_newlink+0x63/0xa0 [ 166.134308][ T72] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 166.134477][ T72] netlink_rcv_skb+0x130/0x360 [ 166.134736][ T72] netlink_unicast+0x449/0x710 [ 166.134904][ T72] netlink_sendmsg+0x723/0xbe0 [ 166.135075][ T72] ____sys_sendmsg+0x7b2/0xa10 [ 166.135244][ T72] ___sys_sendmsg+0xee/0x170 [ 166.135493][ T72] __sys_sendmsg+0xcd/0x170 [ 166.135660][ T72] do_syscall_64+0xc6/0x1e0 [ 166.135826][ T72] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 166.136104][ T72] INITIAL READ USE at: [ 166.136204][ T72] __lock_acquire+0x797/0x1570 [ 166.136378][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.136545][ T72] _raw_read_lock_bh+0x44/0x80 [ 166.136800][ T72] inet6_fill_ifla6_attrs+0x516/0x740 [ 166.137001][ T72] inet6_fill_link_af+0x5e/0xe0 [ 166.137167][ T72] rtnl_fill_ifinfo+0x1615/0x2a90 [ 166.137337][ T72] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 166.137540][ T72] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 166.137742][ T72] rtmsg_ifinfo+0x5b/0xa0 [ 166.137999][ T72] register_netdevice+0x1177/0x1690 [ 166.138197][ T72] register_netdev+0x20/0x40 [ 166.138365][ T72] vti6_init_net+0x25d/0x380 [ 166.138611][ T72] ops_init+0x9b/0x560 [ 166.138783][ T72] register_pernet_operations+0x2db/0x710 [ 166.138980][ T72] register_pernet_device+0x2a/0x60 [ 166.139260][ T72] vti6_tunnel_init+0x18/0x110 [ 166.139427][ T72] do_one_initcall+0x8d/0x1e0 [ 166.139594][ T72] do_initcalls+0x1b2/0x3e0 [ 166.139766][ T72] kernel_init_freeable+0x232/0x310 [ 166.140041][ T72] kernel_init+0x20/0x200 [ 166.140210][ T72] ret_from_fork+0x31/0x70 [ 166.140377][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.140623][ T72] } [ 166.140692][ T72] ... key at: [] __key.37+0x0/0x40 [ 166.140896][ T72] [ 166.140896][ T72] the dependencies between the lock to be acquired [ 166.140898][ T72] and SOFTIRQ-irq-unsafe lock: [ 166.141338][ T72] -> (&p->alloc_lock){+.+.}-{2:2} { [ 166.141477][ T72] HARDIRQ-ON-W at: [ 166.141580][ T72] __lock_acquire+0x797/0x1570 [ 166.141832][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.142000][ T72] _raw_spin_lock+0x30/0x40 [ 166.142176][ T72] set_mems_allowed+0x1d/0x210 [ 166.142347][ T72] kernel_init_freeable+0x72/0x310 [ 166.142594][ T72] kernel_init+0x20/0x200 [ 166.142761][ T72] ret_from_fork+0x31/0x70 [ 166.142928][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.143184][ T72] SOFTIRQ-ON-W at: [ 166.143284][ T72] __lock_acquire+0x797/0x1570 [ 166.143452][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.143628][ T72] _raw_spin_lock+0x30/0x40 [ 166.143873][ T72] set_mems_allowed+0x1d/0x210 [ 166.144043][ T72] kernel_init_freeable+0x72/0x310 [ 166.144209][ T72] kernel_init+0x20/0x200 [ 166.144452][ T72] ret_from_fork+0x31/0x70 [ 166.144619][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.144790][ T72] INITIAL USE at: [ 166.144890][ T72] __lock_acquire+0x797/0x1570 [ 166.145138][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.145306][ T72] _raw_spin_lock+0x30/0x40 [ 166.145473][ T72] set_mems_allowed+0x1d/0x210 [ 166.145639][ T72] kernel_init_freeable+0x72/0x310 [ 166.145898][ T72] kernel_init+0x20/0x200 [ 166.146072][ T72] ret_from_fork+0x31/0x70 [ 166.146242][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.146410][ T72] } [ 166.146480][ T72] ... key at: [] __key.388+0x0/0x40 [ 166.146679][ T72] ... acquired at: [ 166.146783][ T72] check_prev_add+0x194/0xce0 [ 166.146996][ T72] validate_chain+0x71d/0x9b0 [ 166.147129][ T72] __lock_acquire+0xaf0/0x1570 [ 166.147265][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.147398][ T72] _raw_spin_lock+0x30/0x40 [ 166.147530][ T72] __get_task_comm+0x27/0x70 [ 166.147745][ T72] ref_tracker_alloc+0x2ee/0x490 [ 166.147881][ T72] netdev_get_by_index+0x5e/0x80 [ 166.148014][ T72] fib6_nh_init+0x3d8/0x1580 [ 166.148148][ T72] ip6_route_info_create+0xf18/0x17d0 [ 166.148283][ T72] addrconf_f6i_alloc+0x265/0x560 [ 166.148422][ T72] __ipv6_dev_ac_inc+0x25f/0xb10 [ 166.148556][ T72] addrconf_join_anycast+0x1c0/0x220 [ 166.148693][ T72] __ipv6_ifa_notify+0x6b3/0xaf0 [ 166.148903][ T72] addrconf_dad_completed+0x12b/0xe20 [ 166.149036][ T72] addrconf_dad_begin+0x310/0x670 [ 166.149168][ T72] addrconf_dad_work+0x10b/0xab0 [ 166.149300][ T72] process_one_work+0xe2c/0x1730 [ 166.149516][ T72] worker_thread+0x587/0xd30 [ 166.149653][ T72] kthread+0x28a/0x350 [ 166.149755][ T72] ret_from_fork+0x31/0x70 [ 166.149888][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.150021][ T72] [ 166.150170][ T72] [ 166.150170][ T72] stack backtrace: [ 166.150335][ T72] CPU: 2 PID: 72 Comm: kworker/u16:1 Not tainted 6.9.0-rc1-virtme #1 [ 166.150536][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 166.150918][ T72] Workqueue: ipv6_addrconf addrconf_dad_work [ 166.151093][ T72] Call Trace: [ 166.151198][ T72] [ 166.151270][ T72] dump_stack_lvl+0x82/0xd0 [ 166.151483][ T72] print_bad_irq_dependency+0x957/0xd40 [ 166.151627][ T72] ? __pfx_validate_chain+0x10/0x10 [ 166.151764][ T72] ? __pfx_print_bad_irq_dependency+0x10/0x10 [ 166.151933][ T72] ? __pfx_usage_skip+0x10/0x10 [ 166.152144][ T72] ? __bfs+0x246/0x650 [ 166.152244][ T72] ? __pfx_usage_match+0x10/0x10 [ 166.152378][ T72] check_irq_usage+0x596/0x850 [ 166.152516][ T72] ? __pfx_check_irq_usage+0x10/0x10 [ 166.152650][ T72] ? __bfs+0x246/0x650 [ 166.152826][ T72] ? __pfx_hlock_conflict+0x10/0x10 [ 166.152965][ T72] ? check_path.constprop.0+0x24/0x50 [ 166.153103][ T72] ? check_noncircular+0x14c/0x3e0 [ 166.153237][ T72] ? __pfx_check_noncircular+0x10/0x10 [ 166.153451][ T72] ? check_prev_add+0x194/0xce0 [ 166.153591][ T72] check_prev_add+0x194/0xce0 [ 166.153728][ T72] ? validate_chain+0x130/0x9b0 [ 166.153861][ T72] validate_chain+0x71d/0x9b0 [ 166.153996][ T72] ? mark_lock+0x38/0x3e0 [ 166.154173][ T72] ? __pfx_validate_chain+0x10/0x10 [ 166.154306][ T72] ? hlock_class+0x4e/0x130 [ 166.154446][ T72] ? mark_lock+0x38/0x3e0 [ 166.154549][ T72] __lock_acquire+0xaf0/0x1570 [ 166.154762][ T72] lock_acquire.part.0+0xeb/0x330 [ 166.154896][ T72] ? __get_task_comm+0x27/0x70 [ 166.155030][ T72] ? mark_lock+0x38/0x3e0 [ 166.155131][ T72] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 166.155266][ T72] ? trace_lock_acquire+0x135/0x1c0 [ 166.155479][ T72] ? __get_task_comm+0x27/0x70 [ 166.155622][ T72] ? lock_acquire+0x32/0xc0 [ 166.155756][ T72] ? __get_task_comm+0x27/0x70 [ 166.155891][ T72] _raw_spin_lock+0x30/0x40 [ 166.156175][ T72] ? __get_task_comm+0x27/0x70 [ 166.156307][ T72] __get_task_comm+0x27/0x70 [ 166.156444][ T72] ref_tracker_alloc+0x2ee/0x490 [ 166.156578][ T72] ? __pfx_ref_tracker_alloc+0x10/0x10 [ 166.156789][ T72] ? dev_get_by_index+0x177/0x270 [ 166.156922][ T72] ? netdev_get_by_index+0x5e/0x80 [ 166.157057][ T72] ? fib6_nh_init+0x3d8/0x1580 [ 166.157189][ T72] ? ip6_route_info_create+0xf18/0x17d0 [ 166.157325][ T72] ? addrconf_f6i_alloc+0x265/0x560 [ 166.157532][ T72] ? __ipv6_dev_ac_inc+0x25f/0xb10 [ 166.157665][ T72] ? addrconf_join_anycast+0x1c0/0x220 [ 166.157798][ T72] ? __ipv6_ifa_notify+0x6b3/0xaf0 [ 166.157930][ T72] ? addrconf_dad_completed+0x12b/0xe20 [ 166.158143][ T72] ? addrconf_dad_begin+0x310/0x670 [ 166.158274][ T72] ? addrconf_dad_work+0x10b/0xab0 [ 166.158408][ T72] ? process_one_work+0xe2c/0x1730 [ 166.158541][ T72] ? worker_thread+0x587/0xd30 [ 166.158761][ T72] ? kthread+0x28a/0x350 [ 166.158861][ T72] ? ret_from_fork+0x31/0x70 [ 166.158994][ T72] ? ret_from_fork_asm+0x1a/0x30 [ 166.159127][ T72] ? dev_get_by_index+0x177/0x270 [ 166.159270][ T72] netdev_get_by_index+0x5e/0x80 [ 166.159406][ T72] fib6_nh_init+0x3d8/0x1580 [ 166.159538][ T72] ? lockdep_hardirqs_on_prepare.part.0+0x14f/0x370 [ 166.159705][ T72] ? __pfx_fib6_nh_init+0x10/0x10 [ 166.159839][ T72] ? kasan_save_track+0x14/0x30 [ 166.160050][ T72] ? __kasan_kmalloc+0x7f/0x90 [ 166.160186][ T72] ? __kmalloc+0x1d7/0x3c0 [ 166.160319][ T72] ? fib6_get_table+0x116/0x290 [ 166.160454][ T72] ip6_route_info_create+0xf18/0x17d0 [ 166.160667][ T72] ? __lock_release+0x103/0x460 [ 166.160809][ T72] ? __pfx_ip6_route_info_create+0x10/0x10 [ 166.160974][ T72] ? addrconf_f6i_alloc+0x12d/0x560 [ 166.161114][ T72] addrconf_f6i_alloc+0x265/0x560 [ 166.161324][ T72] ? __pfx_addrconf_f6i_alloc+0x10/0x10 [ 166.161460][ T72] ? do_raw_write_lock+0x122/0x3b0 [ 166.161592][ T72] ? __pfx_do_raw_write_lock+0x10/0x10 [ 166.161725][ T72] ? lock_acquire+0x32/0xc0 [ 166.161940][ T72] __ipv6_dev_ac_inc+0x25f/0xb10 [ 166.162077][ T72] ? mark_held_locks+0x9e/0xe0 [ 166.162211][ T72] addrconf_join_anycast+0x1c0/0x220 [ 166.162342][ T72] ? ip6_ins_rt+0xbd/0x110 [ 166.162551][ T72] ? __pfx_addrconf_join_anycast+0x10/0x10 [ 166.162718][ T72] __ipv6_ifa_notify+0x6b3/0xaf0 [ 166.162853][ T72] ? __pfx___ipv6_ifa_notify+0x10/0x10 [ 166.162990][ T72] ? __pfx___cancel_work+0x10/0x10 [ 166.163202][ T72] ? find_held_lock+0x2c/0x110 [ 166.163336][ T72] ? addrconf_dad_completed+0x12b/0xe20 [ 166.163468][ T72] addrconf_dad_completed+0x12b/0xe20 [ 166.163600][ T72] ? hlock_class+0x4e/0x130 [ 166.163733][ T72] ? __pfx_addrconf_dad_completed+0x10/0x10 [ 166.163975][ T72] ? mark_held_locks+0x9e/0xe0 [ 166.164110][ T72] ? addrconf_dad_begin+0x310/0x670 [ 166.164241][ T72] addrconf_dad_begin+0x310/0x670 [ 166.164378][ T72] ? hlock_class+0x4e/0x130 [ 166.164587][ T72] ? __pfx_addrconf_dad_begin+0x10/0x10 [ 166.164721][ T72] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 166.164890][ T72] addrconf_dad_work+0x10b/0xab0 [ 166.165023][ T72] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 166.165233][ T72] ? __pfx_addrconf_dad_work+0x10/0x10 [ 166.165365][ T72] ? process_one_work+0xde2/0x1730 [ 166.165501][ T72] ? lock_acquire+0x32/0xc0 [ 166.165634][ T72] ? process_one_work+0xde2/0x1730 [ 166.165844][ T72] process_one_work+0xe2c/0x1730 [ 166.165982][ T72] ? __pfx___lock_release+0x10/0x10 [ 166.166128][ T72] ? __pfx_process_one_work+0x10/0x10 [ 166.166263][ T72] ? assign_work+0x16c/0x240 [ 166.166548][ T72] worker_thread+0x587/0xd30 [ 166.166681][ T72] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370 [ 166.166852][ T72] ? __pfx_worker_thread+0x10/0x10 [ 166.166988][ T72] ? __pfx_worker_thread+0x10/0x10 [ 166.167196][ T72] kthread+0x28a/0x350 [ 166.167297][ T72] ? __pfx_kthread+0x10/0x10 [ 166.167429][ T72] ret_from_fork+0x31/0x70 [ 166.167562][ T72] ? __pfx_kthread+0x10/0x10 [ 166.167695][ T72] ret_from_fork_asm+0x1a/0x30 [ 166.167910][ T72]