[ 24.200291][ T234] ip (234) used greatest stack depth: 23328 bytes left [ 35.498097][ C2] [ 35.498218][ C2] ======================================================== [ 35.498434][ C2] WARNING: possible irq lock inversion dependency detected [ 35.498644][ C2] 6.9.0-rc1-virtme #1 Not tainted [ 35.498787][ C2] -------------------------------------------------------- [ 35.499001][ C2] swapper/2/0 just changed the state of lock: [ 35.499186][ C2] ffff888005c0ed80 (&ndev->lock){++-.}-{2:2}, at: addrconf_rs_timer+0xa9/0x730 [ 35.499448][ C2] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 35.499661][ C2] (&p->alloc_lock){+.+.}-{2:2} [ 35.499665][ C2] [ 35.499665][ C2] [ 35.499665][ C2] and interrupts could create inverse lock ordering between them. [ 35.499665][ C2] [ 35.500190][ C2] [ 35.500190][ C2] other info that might help us debug this: [ 35.500398][ C2] Possible interrupt unsafe locking scenario: [ 35.500398][ C2] [ 35.500613][ C2] CPU0 CPU1 [ 35.500759][ C2] ---- ---- [ 35.500899][ C2] lock(&p->alloc_lock); [ 35.501009][ C2] local_irq_disable(); [ 35.501185][ C2] lock(&ndev->lock); [ 35.501364][ C2] lock(&p->alloc_lock); [ 35.501538][ C2] [ 35.501641][ C2] lock(&ndev->lock); [ 35.501743][ C2] [ 35.501743][ C2] *** DEADLOCK *** [ 35.501743][ C2] [ 35.501935][ C2] 1 lock held by swapper/2/0: [ 35.502067][ C2] #0: ffffc90000230d68 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 35.502303][ C2] [ 35.502303][ C2] the shortest dependencies between 2nd lock and 1st lock: [ 35.502524][ C2] -> (&p->alloc_lock){+.+.}-{2:2} { [ 35.502660][ C2] HARDIRQ-ON-W at: [ 35.502764][ C2] __lock_acquire+0x797/0x1570 [ 35.502934][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.503099][ C2] _raw_spin_lock+0x30/0x40 [ 35.503271][ C2] set_mems_allowed+0x1d/0x210 [ 35.503434][ C2] kernel_init_freeable+0x72/0x310 [ 35.503603][ C2] kernel_init+0x20/0x200 [ 35.503769][ C2] ret_from_fork+0x31/0x70 [ 35.503934][ C2] ret_from_fork_asm+0x1a/0x30 [ 35.504099][ C2] SOFTIRQ-ON-W at: [ 35.504197][ C2] __lock_acquire+0x797/0x1570 [ 35.504360][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.504523][ C2] _raw_spin_lock+0x30/0x40 [ 35.504687][ C2] set_mems_allowed+0x1d/0x210 [ 35.504854][ C2] kernel_init_freeable+0x72/0x310 [ 35.505017][ C2] kernel_init+0x20/0x200 [ 35.505183][ C2] ret_from_fork+0x31/0x70 [ 35.505346][ C2] ret_from_fork_asm+0x1a/0x30 [ 35.505536][ C2] INITIAL USE at: [ 35.505644][ C2] __lock_acquire+0x797/0x1570 [ 35.505810][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.505973][ C2] _raw_spin_lock+0x30/0x40 [ 35.506136][ C2] set_mems_allowed+0x1d/0x210 [ 35.506297][ C2] kernel_init_freeable+0x72/0x310 [ 35.506463][ C2] kernel_init+0x20/0x200 [ 35.506629][ C2] ret_from_fork+0x31/0x70 [ 35.506795][ C2] ret_from_fork_asm+0x1a/0x30 [ 35.506960][ C2] } [ 35.507027][ C2] ... key at: [] __key.387+0x0/0x40 [ 35.507224][ C2] ... acquired at: [ 35.507321][ C2] __lock_acquire+0xaf0/0x1570 [ 35.507458][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.507591][ C2] _raw_spin_lock+0x30/0x40 [ 35.507721][ C2] __get_task_comm+0x27/0x70 [ 35.507853][ C2] ref_tracker_alloc+0x2ee/0x490 [ 35.507986][ C2] netdev_get_by_index+0x5e/0x80 [ 35.508120][ C2] fib6_nh_init+0x3d8/0x15b0 [ 35.508252][ C2] ip6_route_info_create+0xf18/0x17d0 [ 35.508382][ C2] addrconf_f6i_alloc+0x265/0x560 [ 35.508512][ C2] __ipv6_dev_ac_inc+0x25f/0xb10 [ 35.508653][ C2] addrconf_join_anycast+0x1c0/0x220 [ 35.508795][ C2] dev_forward_change+0x2a6/0x7b0 [ 35.508940][ C2] addrconf_fixup_forwarding+0x23f/0x460 [ 35.509102][ C2] addrconf_sysctl_forward+0x212/0x2b0 [ 35.509235][ C2] proc_sys_call_handler+0x403/0x5e0 [ 35.509368][ C2] vfs_write+0x9e5/0x10a0 [ 35.509500][ C2] ksys_write+0xf5/0x1e0 [ 35.509630][ C2] do_syscall_64+0xc6/0x1e0 [ 35.509764][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 35.509928][ C2] [ 35.509994][ C2] -> (&ndev->lock){++-.}-{2:2} { [ 35.510130][ C2] HARDIRQ-ON-W at: [ 35.510227][ C2] __lock_acquire+0x797/0x1570 [ 35.510397][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.510561][ C2] _raw_write_lock_bh+0x38/0x50 [ 35.510725][ C2] addrconf_permanent_addr+0x6e/0x670 [ 35.510888][ C2] addrconf_notify+0x749/0xd60 [ 35.511055][ C2] notifier_call_chain+0xcd/0x150 [ 35.511219][ C2] __dev_notify_flags+0xe6/0x250 [ 35.511382][ C2] dev_change_flags+0xec/0x160 [ 35.511546][ C2] do_setlink+0x7d6/0x21e0 [ 35.511707][ C2] __rtnl_newlink+0xaa7/0xd80 [ 35.511871][ C2] rtnl_newlink+0x63/0xa0 [ 35.512039][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 35.512203][ C2] netlink_rcv_skb+0x130/0x360 [ 35.512368][ C2] netlink_unicast+0x449/0x710 [ 35.512532][ C2] netlink_sendmsg+0x723/0xbe0 [ 35.512695][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 35.512859][ C2] ___sys_sendmsg+0xee/0x170 [ 35.513022][ C2] __sys_sendmsg+0xcd/0x170 [ 35.513193][ C2] do_syscall_64+0xc6/0x1e0 [ 35.513357][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 35.513549][ C2] HARDIRQ-ON-R at: [ 35.513649][ C2] __lock_acquire+0x797/0x1570 [ 35.513814][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.513978][ C2] _raw_read_lock_bh+0x44/0x80 [ 35.514142][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 35.514314][ C2] inet6_fill_link_af+0x5e/0xe0 [ 35.514477][ C2] rtnl_fill_ifinfo+0x1612/0x29e0 [ 35.514641][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 35.514805][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 35.515000][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 35.515166][ C2] register_netdevice+0x1177/0x1690 [ 35.515331][ C2] register_netdev+0x20/0x40 [ 35.515520][ C2] sit_init_net+0x250/0x4f0 [ 35.515686][ C2] ops_init+0x9b/0x560 [ 35.515817][ C2] register_pernet_operations+0x2db/0x710 [ 35.516013][ C2] register_pernet_device+0x2a/0x60 [ 35.516175][ C2] sit_init+0x23/0xe0 [ 35.516309][ C2] do_one_initcall+0x8d/0x1e0 [ 35.516475][ C2] do_initcalls+0x1b2/0x3e0 [ 35.516639][ C2] kernel_init_freeable+0x232/0x310 [ 35.516804][ C2] kernel_init+0x20/0x200 [ 35.516968][ C2] ret_from_fork+0x31/0x70 [ 35.517136][ C2] ret_from_fork_asm+0x1a/0x30 [ 35.517304][ C2] IN-SOFTIRQ-W at: [ 35.517401][ C2] __lock_acquire+0x797/0x1570 [ 35.517567][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.517732][ C2] _raw_write_lock+0x30/0x40 [ 35.517896][ C2] addrconf_rs_timer+0xa9/0x730 [ 35.518057][ C2] call_timer_fn+0x13b/0x230 [ 35.518225][ C2] __run_timers+0x545/0x810 [ 35.518420][ C2] run_timer_softirq+0xe8/0x1b0 [ 35.518581][ C2] __do_softirq+0x1f8/0x5df [ 35.518748][ C2] irq_exit_rcu+0x97/0xc0 [ 35.518912][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 35.519108][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 35.519306][ C2] default_idle+0xf/0x20 [ 35.519552][ C2] default_idle_call+0x6d/0xb0 [ 35.519714][ C2] cpuidle_idle_call+0x1f4/0x280 [ 35.519880][ C2] do_idle+0xf9/0x160 [ 35.520087][ C2] cpu_startup_entry+0x54/0x60 [ 35.520251][ C2] start_secondary+0x21c/0x2b0 [ 35.520416][ C2] common_startup_64+0x12c/0x138 [ 35.520580][ C2] INITIAL USE at: [ 35.520682][ C2] __lock_acquire+0x797/0x1570 [ 35.520844][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.521019][ C2] _raw_write_lock_bh+0x38/0x50 [ 35.521257][ C2] addrconf_permanent_addr+0x6e/0x670 [ 35.521421][ C2] addrconf_notify+0x749/0xd60 [ 35.521585][ C2] notifier_call_chain+0xcd/0x150 [ 35.521754][ C2] __dev_notify_flags+0xe6/0x250 [ 35.522068][ C2] dev_change_flags+0xec/0x160 [ 35.522232][ C2] do_setlink+0x7d6/0x21e0 [ 35.522395][ C2] __rtnl_newlink+0xaa7/0xd80 [ 35.522633][ C2] rtnl_newlink+0x63/0xa0 [ 35.522797][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 35.522959][ C2] netlink_rcv_skb+0x130/0x360 [ 35.523127][ C2] netlink_unicast+0x449/0x710 [ 35.523367][ C2] netlink_sendmsg+0x723/0xbe0 [ 35.523530][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 35.523696][ C2] ___sys_sendmsg+0xee/0x170 [ 35.523935][ C2] __sys_sendmsg+0xcd/0x170 [ 35.524099][ C2] do_syscall_64+0xc6/0x1e0 [ 35.524264][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 35.524543][ C2] INITIAL READ USE at: [ 35.524641][ C2] __lock_acquire+0x797/0x1570 [ 35.524806][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.524970][ C2] _raw_read_lock_bh+0x44/0x80 [ 35.525217][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 35.525414][ C2] inet6_fill_link_af+0x5e/0xe0 [ 35.525590][ C2] rtnl_fill_ifinfo+0x1612/0x29e0 [ 35.525755][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 35.525952][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 35.526146][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 35.526309][ C2] register_netdevice+0x1177/0x1690 [ 35.526501][ C2] register_netdev+0x20/0x40 [ 35.526666][ C2] sit_init_net+0x250/0x4f0 [ 35.526903][ C2] ops_init+0x9b/0x560 [ 35.527065][ C2] register_pernet_operations+0x2db/0x710 [ 35.527259][ C2] register_pernet_device+0x2a/0x60 [ 35.527528][ C2] sit_init+0x23/0xe0 [ 35.527692][ C2] do_one_initcall+0x8d/0x1e0 [ 35.527858][ C2] do_initcalls+0x1b2/0x3e0 [ 35.528020][ C2] kernel_init_freeable+0x232/0x310 [ 35.528294][ C2] kernel_init+0x20/0x200 [ 35.528457][ C2] ret_from_fork+0x31/0x70 [ 35.528620][ C2] ret_from_fork_asm+0x1a/0x30 [ 35.528782][ C2] } [ 35.528852][ C2] ... key at: [] __key.37+0x0/0x40 [ 35.529045][ C2] ... acquired at: [ 35.529142][ C2] mark_lock+0x28d/0x3e0 [ 35.529345][ C2] mark_usage+0xd9/0x2a0 [ 35.529475][ C2] __lock_acquire+0x797/0x1570 [ 35.529605][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.529735][ C2] _raw_write_lock+0x30/0x40 [ 35.529866][ C2] addrconf_rs_timer+0xa9/0x730 [ 35.530072][ C2] call_timer_fn+0x13b/0x230 [ 35.530203][ C2] __run_timers+0x545/0x810 [ 35.530335][ C2] run_timer_softirq+0xe8/0x1b0 [ 35.530465][ C2] __do_softirq+0x1f8/0x5df [ 35.530667][ C2] irq_exit_rcu+0x97/0xc0 [ 35.530800][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 35.530961][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 35.531122][ C2] default_idle+0xf/0x20 [ 35.531326][ C2] default_idle_call+0x6d/0xb0 [ 35.531459][ C2] cpuidle_idle_call+0x1f4/0x280 [ 35.531592][ C2] do_idle+0xf9/0x160 [ 35.531692][ C2] cpu_startup_entry+0x54/0x60 [ 35.531970][ C2] start_secondary+0x21c/0x2b0 [ 35.532101][ C2] common_startup_64+0x12c/0x138 [ 35.532230][ C2] [ 35.532298][ C2] [ 35.532298][ C2] stack backtrace: [ 35.532460][ C2] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.9.0-rc1-virtme #1 [ 35.532736][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 35.533026][ C2] Call Trace: [ 35.533199][ C2] [ 35.533269][ C2] dump_stack_lvl+0x82/0xd0 [ 35.533403][ C2] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 35.533565][ C2] ? kernel_text_address+0x17/0xe0 [ 35.533699][ C2] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 35.533939][ C2] ? __pfx_usage_skip+0x10/0x10 [ 35.534074][ C2] ? __pfx_usage_match+0x10/0x10 [ 35.534203][ C2] ? arch_stack_walk+0x8c/0xf0 [ 35.534336][ C2] mark_lock_irq+0x4cd/0xa10 [ 35.534540][ C2] ? common_startup_64+0x12c/0x138 [ 35.534676][ C2] ? __pfx_mark_lock_irq+0x10/0x10 [ 35.534808][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 35.534942][ C2] ? save_trace+0x8f/0x5b0 [ 35.535157][ C2] mark_lock+0x28d/0x3e0 [ 35.535256][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 35.535388][ C2] mark_usage+0xd9/0x2a0 [ 35.535491][ C2] __lock_acquire+0x797/0x1570 [ 35.535633][ C2] ? __pfx_validate_chain+0x10/0x10 [ 35.535762][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 35.535890][ C2] lock_acquire.part.0+0xeb/0x330 [ 35.536018][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 35.536150][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.536358][ C2] ? trace_lock_acquire+0x135/0x1c0 [ 35.536487][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 35.536614][ C2] ? lock_acquire+0x32/0xc0 [ 35.536748][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 35.536950][ C2] _raw_write_lock+0x30/0x40 [ 35.537078][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 35.537208][ C2] addrconf_rs_timer+0xa9/0x730 [ 35.537336][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.537468][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 35.537670][ C2] ? call_timer_fn+0xe8/0x230 [ 35.537799][ C2] ? lock_acquire+0x32/0xc0 [ 35.537928][ C2] ? call_timer_fn+0xe8/0x230 [ 35.538060][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 35.538260][ C2] call_timer_fn+0x13b/0x230 [ 35.538389][ C2] ? call_timer_fn+0xe8/0x230 [ 35.538517][ C2] ? call_timer_fn+0xe8/0x230 [ 35.538655][ C2] ? __pfx_call_timer_fn+0x10/0x10 [ 35.538858][ C2] ? mark_lock+0x38/0x3e0 [ 35.538962][ C2] __run_timers+0x545/0x810 [ 35.539094][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 35.539224][ C2] ? __pfx___run_timers+0x10/0x10 [ 35.539354][ C2] ? do_raw_spin_lock+0x131/0x270 [ 35.539557][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 35.539685][ C2] ? lock_acquire+0x32/0xc0 [ 35.539819][ C2] ? run_timer_softirq+0xe0/0x1b0 [ 35.539955][ C2] run_timer_softirq+0xe8/0x1b0 [ 35.540166][ C2] __do_softirq+0x1f8/0x5df [ 35.540297][ C2] irq_exit_rcu+0x97/0xc0 [ 35.540395][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 35.540523][ C2] [ 35.540590][ C2] [ 35.540655][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 35.540820][ C2] RIP: 0010:default_idle+0xf/0x20 [ 35.540955][ C2] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 30 35 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 35.541496][ C2] RSP: 0018:ffffc9000015fdf8 EFLAGS: 00000246 [ 35.541661][ C2] RAX: 00000000000fb247 RBX: 1ffff9200002bfc1 RCX: ffffffff93d0e9d5 [ 35.542007][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff916aa4a4 [ 35.542206][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2709c [ 35.542402][ C2] R10: ffff8880361384e3 R11: ffff88803613dc80 R12: 0000000000000000 [ 35.542672][ C2] R13: ffff888001b7c5c0 R14: dffffc0000000000 R15: 0000000000000000 [ 35.542878][ C2] ? ct_kernel_exit.constprop.0+0xc5/0xf0 [ 35.543007][ C2] ? cpuidle_idle_call+0x1f4/0x280 [ 35.543137][ C2] default_idle_call+0x6d/0xb0 [ 35.543344][ C2] cpuidle_idle_call+0x1f4/0x280 [ 35.543472][ C2] ? __pfx_cpuidle_idle_call+0x10/0x10 [ 35.543601][ C2] ? tsc_verify_tsc_adjust+0x5e/0x2b0 [ 35.543734][ C2] do_idle+0xf9/0x160 [ 35.543906][ C2] cpu_startup_entry+0x54/0x60 [ 35.544035][ C2] start_secondary+0x21c/0x2b0 [ 35.544163][ C2] ? __pfx_start_secondary+0x10/0x10 [ 35.544296][ C2] common_startup_64+0x12c/0x138 [ 35.544431][ C2]