[ 39.215775][ C0] [ 39.215910][ C0] ======================================================== [ 39.216177][ C0] WARNING: possible irq lock inversion dependency detected [ 39.216416][ C0] 6.9.0-rc1-virtme #1 Not tainted [ 39.216579][ C0] -------------------------------------------------------- [ 39.216832][ C0] timeout/301 just changed the state of lock: [ 39.217026][ C0] ffff88800474a580 (&ndev->lock){++-.}-{2:2}, at: addrconf_rs_timer+0xa9/0x730 [ 39.217324][ C0] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 39.217556][ C0] (&p->alloc_lock){+.+.}-{2:2} [ 39.217561][ C0] [ 39.217561][ C0] [ 39.217561][ C0] and interrupts could create inverse lock ordering between them. [ 39.217561][ C0] [ 39.218139][ C0] [ 39.218139][ C0] other info that might help us debug this: [ 39.218379][ C0] Possible interrupt unsafe locking scenario: [ 39.218379][ C0] [ 39.218621][ C0] CPU0 CPU1 [ 39.218772][ C0] ---- ---- [ 39.218939][ C0] lock(&p->alloc_lock); [ 39.219066][ C0] local_irq_disable(); [ 39.219261][ C0] lock(&ndev->lock); [ 39.219466][ C0] lock(&p->alloc_lock); [ 39.219681][ C0] [ 39.219813][ C0] lock(&ndev->lock); [ 39.219936][ C0] [ 39.219936][ C0] *** DEADLOCK *** [ 39.219936][ C0] [ 39.220175][ C0] 1 lock held by timeout/301: [ 39.220335][ C0] #0: ffffc90000007d68 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 39.220627][ C0] [ 39.220627][ C0] the shortest dependencies between 2nd lock and 1st lock: [ 39.220939][ C0] -> (&p->alloc_lock){+.+.}-{2:2} { [ 39.221113][ C0] HARDIRQ-ON-W at: [ 39.221245][ C0] __lock_acquire+0x797/0x1570 [ 39.221464][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.221680][ C0] _raw_spin_lock+0x30/0x40 [ 39.221892][ C0] set_mems_allowed+0x1d/0x210 [ 39.222103][ C0] kernel_init_freeable+0x72/0x310 [ 39.222315][ C0] kernel_init+0x20/0x200 [ 39.222538][ C0] ret_from_fork+0x31/0x70 [ 39.222741][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.222939][ C0] SOFTIRQ-ON-W at: [ 39.223056][ C0] __lock_acquire+0x797/0x1570 [ 39.223265][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.223458][ C0] _raw_spin_lock+0x30/0x40 [ 39.223659][ C0] set_mems_allowed+0x1d/0x210 [ 39.223859][ C0] kernel_init_freeable+0x72/0x310 [ 39.224053][ C0] kernel_init+0x20/0x200 [ 39.224264][ C0] ret_from_fork+0x31/0x70 [ 39.224464][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.224697][ C0] INITIAL USE at: [ 39.224832][ C0] __lock_acquire+0x797/0x1570 [ 39.225029][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.225227][ C0] _raw_spin_lock+0x30/0x40 [ 39.225424][ C0] set_mems_allowed+0x1d/0x210 [ 39.225625][ C0] kernel_init_freeable+0x72/0x310 [ 39.225825][ C0] kernel_init+0x20/0x200 [ 39.226025][ C0] ret_from_fork+0x31/0x70 [ 39.226267][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.226487][ C0] } [ 39.226573][ C0] ... key at: [] __key.387+0x0/0x40 [ 39.226831][ C0] ... acquired at: [ 39.226958][ C0] __lock_acquire+0xaf0/0x1570 [ 39.227127][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.227305][ C0] _raw_spin_lock+0x30/0x40 [ 39.227474][ C0] __get_task_comm+0x27/0x70 [ 39.227660][ C0] ref_tracker_alloc+0x2ee/0x490 [ 39.227832][ C0] netdev_get_by_index+0x5e/0x80 [ 39.228004][ C0] fib6_nh_init+0x3d8/0x15b0 [ 39.228178][ C0] ip6_route_info_create+0xf18/0x17d0 [ 39.228357][ C0] ip6_route_add+0x1c/0x140 [ 39.228534][ C0] addrconf_prefix_route+0x1cc/0x2b0 [ 39.228706][ C0] addrconf_permanent_addr+0x32f/0x670 [ 39.228879][ C0] addrconf_notify+0x749/0xd60 [ 39.229059][ C0] notifier_call_chain+0xcd/0x150 [ 39.229231][ C0] __dev_notify_flags+0xe6/0x250 [ 39.229405][ C0] dev_change_flags+0xec/0x160 [ 39.229577][ C0] do_setlink+0x7d6/0x21e0 [ 39.229873][ C0] __rtnl_newlink+0xaa7/0xd80 [ 39.230045][ C0] rtnl_newlink+0x63/0xa0 [ 39.230216][ C0] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 39.230387][ C0] netlink_rcv_skb+0x130/0x360 [ 39.230558][ C0] netlink_unicast+0x449/0x710 [ 39.230724][ C0] netlink_sendmsg+0x723/0xbe0 [ 39.230987][ C0] ____sys_sendmsg+0x7b2/0xa10 [ 39.231158][ C0] ___sys_sendmsg+0xee/0x170 [ 39.231330][ C0] __sys_sendmsg+0xcd/0x170 [ 39.231503][ C0] do_syscall_64+0xc6/0x1e0 [ 39.231778][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.231990][ C0] [ 39.232076][ C0] -> (&ndev->lock){++-.}-{2:2} { [ 39.232253][ C0] HARDIRQ-ON-W at: [ 39.232379][ C0] __lock_acquire+0x797/0x1570 [ 39.232595][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.232807][ C0] _raw_write_lock_bh+0x38/0x50 [ 39.233131][ C0] addrconf_permanent_addr+0x6e/0x670 [ 39.233340][ C0] addrconf_notify+0x749/0xd60 [ 39.233662][ C0] notifier_call_chain+0xcd/0x150 [ 39.233986][ C0] __dev_notify_flags+0xe6/0x250 [ 39.234212][ C0] dev_change_flags+0xec/0x160 [ 39.234417][ C0] do_setlink+0x7d6/0x21e0 [ 39.234732][ C0] __rtnl_newlink+0xaa7/0xd80 [ 39.234946][ C0] rtnl_newlink+0x63/0xa0 [ 39.235254][ C0] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 39.235462][ C0] netlink_rcv_skb+0x130/0x360 [ 39.235656][ C0] netlink_unicast+0x449/0x710 [ 39.235853][ C0] netlink_sendmsg+0x723/0xbe0 [ 39.236054][ C0] ____sys_sendmsg+0x7b2/0xa10 [ 39.236359][ C0] ___sys_sendmsg+0xee/0x170 [ 39.236562][ C0] __sys_sendmsg+0xcd/0x170 [ 39.236764][ C0] do_syscall_64+0xc6/0x1e0 [ 39.236964][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.237323][ C0] HARDIRQ-ON-R at: [ 39.237453][ C0] __lock_acquire+0x797/0x1570 [ 39.237679][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.237990][ C0] _raw_read_lock_bh+0x44/0x80 [ 39.238191][ C0] inet6_fill_ifla6_attrs+0x516/0x740 [ 39.238387][ C0] inet6_fill_link_af+0x5e/0xe0 [ 39.238583][ C0] rtnl_fill_ifinfo+0x1612/0x29e0 [ 39.238891][ C0] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 39.239093][ C0] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 39.239348][ C0] rtmsg_ifinfo+0x5b/0xa0 [ 39.239549][ C0] register_netdevice+0x1177/0x1690 [ 39.239746][ C0] register_netdev+0x20/0x40 [ 39.239944][ C0] sit_init_net+0x250/0x4f0 [ 39.240146][ C0] ops_init+0x9b/0x560 [ 39.240311][ C0] register_pernet_operations+0x2db/0x710 [ 39.240545][ C0] register_pernet_device+0x2a/0x60 [ 39.240775][ C0] sit_init+0x23/0xe0 [ 39.240951][ C0] do_one_initcall+0x8d/0x1e0 [ 39.241167][ C0] do_initcalls+0x1b2/0x3e0 [ 39.241377][ C0] kernel_init_freeable+0x232/0x310 [ 39.241715][ C0] kernel_init+0x20/0x200 [ 39.241951][ C0] ret_from_fork+0x31/0x70 [ 39.242160][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.242387][ C0] IN-SOFTIRQ-W at: [ 39.242602][ C0] __lock_acquire+0x797/0x1570 [ 39.242793][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.242996][ C0] _raw_write_lock+0x30/0x40 [ 39.243199][ C0] addrconf_rs_timer+0xa9/0x730 [ 39.243491][ C0] call_timer_fn+0x13b/0x230 [ 39.243687][ C0] __run_timers+0x545/0x810 [ 39.243982][ C0] run_timer_softirq+0xe8/0x1b0 [ 39.244291][ C0] __do_softirq+0x1f8/0x5df [ 39.244491][ C0] irq_exit_rcu+0x97/0xc0 [ 39.244694][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 39.245040][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 39.245286][ C0] _raw_spin_unlock_irqrestore+0x43/0x70 [ 39.245519][ C0] get_partial_node.part.0+0x1c5/0x3a0 [ 39.245713][ C0] ___slab_alloc+0xb70/0x10a0 [ 39.246016][ C0] __kmalloc+0x34c/0x3c0 [ 39.246212][ C0] p9_fcall_init+0x7d/0x1b0 [ 39.246411][ C0] p9_tag_alloc+0x138/0x700 [ 39.246707][ C0] p9_client_prepare_req+0xe6/0x290 [ 39.246910][ C0] p9_client_rpc+0x18d/0x930 [ 39.247121][ C0] p9_client_readlink+0x71/0x120 [ 39.247422][ C0] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 39.247620][ C0] pick_link+0xac6/0x1160 [ 39.247818][ C0] step_into+0x84e/0xfa0 [ 39.248120][ C0] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 39.248353][ C0] path_openat+0x1be/0x440 [ 39.248550][ C0] do_filp_open+0x1b3/0x3e0 [ 39.248762][ C0] do_sys_openat2+0x122/0x160 [ 39.249098][ C0] __x64_sys_openat+0x123/0x1e0 [ 39.249418][ C0] do_syscall_64+0xc6/0x1e0 [ 39.249627][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.249992][ C0] INITIAL USE at: [ 39.250223][ C0] __lock_acquire+0x797/0x1570 [ 39.250442][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.250754][ C0] _raw_write_lock_bh+0x38/0x50 [ 39.251169][ C0] addrconf_permanent_addr+0x6e/0x670 [ 39.251380][ C0] addrconf_notify+0x749/0xd60 [ 39.251592][ C0] notifier_call_chain+0xcd/0x150 [ 39.251920][ C0] __dev_notify_flags+0xe6/0x250 [ 39.252142][ C0] dev_change_flags+0xec/0x160 [ 39.252356][ C0] do_setlink+0x7d6/0x21e0 [ 39.252671][ C0] __rtnl_newlink+0xaa7/0xd80 [ 39.252880][ C0] rtnl_newlink+0x63/0xa0 [ 39.253092][ C0] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 39.253309][ C0] netlink_rcv_skb+0x130/0x360 [ 39.253636][ C0] netlink_unicast+0x449/0x710 [ 39.253948][ C0] netlink_sendmsg+0x723/0xbe0 [ 39.254173][ C0] ____sys_sendmsg+0x7b2/0xa10 [ 39.254382][ C0] ___sys_sendmsg+0xee/0x170 [ 39.254694][ C0] __sys_sendmsg+0xcd/0x170 [ 39.254905][ C0] do_syscall_64+0xc6/0x1e0 [ 39.255227][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.255483][ C0] INITIAL READ USE at: [ 39.255609][ C0] __lock_acquire+0x797/0x1570 [ 39.255935][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.256246][ C0] _raw_read_lock_bh+0x44/0x80 [ 39.256552][ C0] inet6_fill_ifla6_attrs+0x516/0x740 [ 39.256926][ C0] inet6_fill_link_af+0x5e/0xe0 [ 39.257135][ C0] rtnl_fill_ifinfo+0x1612/0x29e0 [ 39.257348][ C0] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 39.257608][ C0] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 39.257868][ C0] rtmsg_ifinfo+0x5b/0xa0 [ 39.258179][ C0] register_netdevice+0x1177/0x1690 [ 39.258464][ C0] register_netdev+0x20/0x40 [ 39.258685][ C0] sit_init_net+0x250/0x4f0 [ 39.259003][ C0] ops_init+0x9b/0x560 [ 39.259225][ C0] register_pernet_operations+0x2db/0x710 [ 39.259481][ C0] register_pernet_device+0x2a/0x60 [ 39.259748][ C0] sit_init+0x23/0xe0 [ 39.259965][ C0] do_one_initcall+0x8d/0x1e0 [ 39.260175][ C0] do_initcalls+0x1b2/0x3e0 [ 39.260593][ C0] kernel_init_freeable+0x232/0x310 [ 39.260845][ C0] kernel_init+0x20/0x200 [ 39.261060][ C0] ret_from_fork+0x31/0x70 [ 39.261381][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.261595][ C0] } [ 39.261676][ C0] ... key at: [] __key.36+0x0/0x40 [ 39.261912][ C0] ... acquired at: [ 39.262125][ C0] mark_lock+0x28d/0x3e0 [ 39.262397][ C0] mark_usage+0xd9/0x2a0 [ 39.262558][ C0] __lock_acquire+0x797/0x1570 [ 39.262721][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.262879][ C0] _raw_write_lock+0x30/0x40 [ 39.263032][ C0] addrconf_rs_timer+0xa9/0x730 [ 39.263192][ C0] call_timer_fn+0x13b/0x230 [ 39.263353][ C0] __run_timers+0x545/0x810 [ 39.263517][ C0] run_timer_softirq+0xe8/0x1b0 [ 39.263667][ C0] __do_softirq+0x1f8/0x5df [ 39.263926][ C0] irq_exit_rcu+0x97/0xc0 [ 39.264192][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 39.264395][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 39.264687][ C0] _raw_spin_unlock_irqrestore+0x43/0x70 [ 39.264988][ C0] get_partial_node.part.0+0x1c5/0x3a0 [ 39.265145][ C0] ___slab_alloc+0xb70/0x10a0 [ 39.265299][ C0] __kmalloc+0x34c/0x3c0 [ 39.265462][ C0] p9_fcall_init+0x7d/0x1b0 [ 39.265618][ C0] p9_tag_alloc+0x138/0x700 [ 39.265774][ C0] p9_client_prepare_req+0xe6/0x290 [ 39.266033][ C0] p9_client_rpc+0x18d/0x930 [ 39.266191][ C0] p9_client_readlink+0x71/0x120 [ 39.266358][ C0] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 39.266524][ C0] pick_link+0xac6/0x1160 [ 39.266683][ C0] step_into+0x84e/0xfa0 [ 39.266877][ C0] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 39.267099][ C0] path_openat+0x1be/0x440 [ 39.267258][ C0] do_filp_open+0x1b3/0x3e0 [ 39.267413][ C0] do_sys_openat2+0x122/0x160 [ 39.267673][ C0] __x64_sys_openat+0x123/0x1e0 [ 39.267830][ C0] do_syscall_64+0xc6/0x1e0 [ 39.268024][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.268234][ C0] [ 39.268319][ C0] [ 39.268319][ C0] stack backtrace: [ 39.268617][ C0] CPU: 0 PID: 301 Comm: timeout Not tainted 6.9.0-rc1-virtme #1 [ 39.268867][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 39.269321][ C0] Call Trace: [ 39.269441][ C0] [ 39.269524][ C0] dump_stack_lvl+0x82/0xd0 [ 39.269692][ C0] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 39.269887][ C0] ? kernel_text_address+0xce/0xe0 [ 39.270146][ C0] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 39.270339][ C0] ? __pfx_usage_skip+0x10/0x10 [ 39.270494][ C0] ? __pfx_usage_match+0x10/0x10 [ 39.270650][ C0] ? arch_stack_walk+0xa2/0xf0 [ 39.270916][ C0] mark_lock_irq+0x4cd/0xa10 [ 39.271081][ C0] ? __pfx_mark_lock_irq+0x10/0x10 [ 39.271238][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 39.271398][ C0] ? save_trace+0x8f/0x5b0 [ 39.271562][ C0] mark_lock+0x28d/0x3e0 [ 39.271680][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 39.271842][ C0] mark_usage+0xd9/0x2a0 [ 39.271960][ C0] __lock_acquire+0x797/0x1570 [ 39.272123][ C0] ? __pfx_validate_chain+0x10/0x10 [ 39.272279][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 39.272432][ C0] lock_acquire.part.0+0xeb/0x330 [ 39.272586][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 39.272746][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.273008][ C0] ? trace_lock_acquire+0x135/0x1c0 [ 39.273169][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 39.273324][ C0] ? lock_acquire+0x32/0xc0 [ 39.273489][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 39.273645][ C0] _raw_write_lock+0x30/0x40 [ 39.273800][ C0] ? addrconf_rs_timer+0xa9/0x730 [ 39.273953][ C0] addrconf_rs_timer+0xa9/0x730 [ 39.274121][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.274370][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 39.274527][ C0] ? call_timer_fn+0xe8/0x230 [ 39.274678][ C0] ? lock_acquire+0x32/0xc0 [ 39.274830][ C0] ? call_timer_fn+0xe8/0x230 [ 39.274987][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 39.275241][ C0] call_timer_fn+0x13b/0x230 [ 39.275395][ C0] ? call_timer_fn+0xe8/0x230 [ 39.275561][ C0] ? call_timer_fn+0xe8/0x230 [ 39.275726][ C0] ? __pfx_call_timer_fn+0x10/0x10 [ 39.275997][ C0] ? mark_lock+0x38/0x3e0 [ 39.276129][ C0] __run_timers+0x545/0x810 [ 39.276299][ C0] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 39.276468][ C0] ? __pfx___run_timers+0x10/0x10 [ 39.276755][ C0] ? do_raw_spin_lock+0x131/0x270 [ 39.276929][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 39.277094][ C0] ? lock_acquire+0x32/0xc0 [ 39.277271][ C0] ? run_timer_softirq+0xe0/0x1b0 [ 39.277447][ C0] run_timer_softirq+0xe8/0x1b0 [ 39.277622][ C0] __do_softirq+0x1f8/0x5df [ 39.277800][ C0] irq_exit_rcu+0x97/0xc0 [ 39.277930][ C0] sysvec_apic_timer_interrupt+0x75/0x80 [ 39.278105][ C0] [ 39.278199][ C0] [ 39.278282][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 39.278592][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 39.278830][ C0] Code: 10 e8 41 ea 91 fd 48 89 ef e8 79 5a 92 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d e5 61 86 7b <74> 0e 5b 5d c3 cc cc cc cc e8 6f 54 b5 fd eb dc 0f 1f 44 00 00 5b [ 39.279552][ C0] RSP: 0018:ffffc90000eff330 EFLAGS: 00000282 [ 39.279775][ C0] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff0c6dc01 [ 39.280046][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff847d67f1 [ 39.280315][ C0] RBP: ffff888001041080 R08: 0000000000000001 R09: fffffbfff0c6e482 [ 39.280568][ C0] R10: ffffffff86372417 R11: 0000000000001000 R12: ffff888001041080 [ 39.280968][ C0] R13: ffffea000019f600 R14: ffff8880010433c0 R15: ffff8880067dc000 [ 39.281255][ C0] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 39.281481][ C0] get_partial_node.part.0+0x1c5/0x3a0 [ 39.281863][ C0] ___slab_alloc+0xb70/0x10a0 [ 39.282035][ C0] ? fs_reclaim_acquire+0xb3/0x170 [ 39.282207][ C0] ? p9_fcall_init+0x7d/0x1b0 [ 39.282400][ C0] ? __pfx___lock_release+0x10/0x10 [ 39.282577][ C0] ? p9_fcall_init+0x7d/0x1b0 [ 39.282748][ C0] ? __kmalloc+0x34c/0x3c0 [ 39.282928][ C0] __kmalloc+0x34c/0x3c0 [ 39.283060][ C0] p9_fcall_init+0x7d/0x1b0 [ 39.283377][ C0] p9_tag_alloc+0x138/0x700 [ 39.283581][ C0] ? __pfx_p9_tag_alloc+0x10/0x10 [ 39.283785][ C0] ? mark_lock+0x38/0x3e0 [ 39.284159][ C0] p9_client_prepare_req+0xe6/0x290 [ 39.284405][ C0] ? __pfx_p9_client_prepare_req+0x10/0x10 [ 39.284690][ C0] ? find_held_lock+0x2c/0x110 [ 39.285123][ C0] p9_client_rpc+0x18d/0x930 [ 39.285375][ C0] ? do_raw_spin_lock+0x131/0x270 [ 39.285627][ C0] ? __pfx_p9_client_rpc+0x10/0x10 [ 39.286049][ C0] ? v9fs_fid_find+0x1af/0x290 [ 39.286320][ C0] ? do_raw_spin_unlock+0x58/0x220 [ 39.286576][ C0] ? _raw_spin_unlock+0x23/0x40 [ 39.286829][ C0] ? __pfx_v9fs_fid_find+0x10/0x10 [ 39.287261][ C0] ? find_held_lock+0x2c/0x110 [ 39.287510][ C0] p9_client_readlink+0x71/0x120 [ 39.287783][ C0] v9fs_vfs_get_link_dotl+0x94/0x1b0 [ 39.288048][ C0] ? __pfx_v9fs_vfs_get_link_dotl+0x10/0x10 [ 39.288541][ C0] ? try_to_unlazy+0x1e1/0x560 [ 39.288787][ C0] pick_link+0xac6/0x1160 [ 39.288972][ C0] ? __pfx___lock_release+0x10/0x10 [ 39.289224][ C0] ? __pfx_v9fs_vfs_get_link_dotl+0x10/0x10 [ 39.289701][ C0] step_into+0x84e/0xfa0 [ 39.289888][ C0] ? read_word_at_a_time+0xe/0x20 [ 39.290299][ C0] ? __d_lookup_rcu+0x20d/0x3f0 [ 39.290559][ C0] ? __pfx_step_into+0x10/0x10 [ 39.290808][ C0] link_path_walk.part.0.constprop.0+0x56a/0x9f0 [ 39.291300][ C0] ? __pfx_link_path_walk.part.0.constprop.0+0x10/0x10 [ 39.291609][ C0] path_openat+0x1be/0x440 [ 39.292044][ C0] ? __pfx_path_openat+0x10/0x10 [ 39.292308][ C0] ? __lock_acquire+0xaf0/0x1570 [ 39.292569][ C0] do_filp_open+0x1b3/0x3e0 [ 39.292819][ C0] ? __pfx_do_filp_open+0x10/0x10 [ 39.293088][ C0] ? find_held_lock+0x2c/0x110 [ 39.293358][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 39.293749][ C0] ? alloc_fd+0x1f5/0x650 [ 39.293930][ C0] ? do_raw_spin_unlock+0x58/0x220 [ 39.294157][ C0] ? _raw_spin_unlock+0x23/0x40 [ 39.294372][ C0] ? alloc_fd+0x1f5/0x650 [ 39.294562][ C0] do_sys_openat2+0x122/0x160 [ 39.294920][ C0] ? vfs_fstatat+0x9e/0xc0 [ 39.295090][ C0] ? __pfx_do_sys_openat2+0x10/0x10 [ 39.295252][ C0] ? __pfx___do_sys_newfstatat+0x10/0x10 [ 39.295422][ C0] __x64_sys_openat+0x123/0x1e0 [ 39.295702][ C0] ? __pfx___x64_sys_openat+0x10/0x10 [ 39.295858][ C0] ? __pfx_do_faccessat+0x10/0x10 [ 39.296028][ C0] do_syscall_64+0xc6/0x1e0 [ 39.296188][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 39.296384][ C0] RIP: 0033:0x7f0388dad0e8 [ 39.296552][ C0] Code: f9 41 89 f0 41 83 e2 40 75 30 89 f0 25 00 00 41 00 3d 00 00 41 00 74 22 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 30 c3 0f 1f 80 00 00 00 00 48 8d 44 24 08 c7 [ 39.297115][ C0] RSP: 002b:00007ffcb842f868 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 [ 39.297368][ C0] RAX: ffffffffffffffda RBX: 00007ffcb842faef RCX: 00007f0388dad0e8 [ 39.297714][ C0] RDX: 0000000000080000 RSI: 00007ffcb842f8e0 RDI: 00000000ffffff9c [ 39.297956][ C0] RBP: 00007ffcb842f8d0 R08: 0000000000080000 R09: 00007ffcb842f8e0 [ 39.298298][ C0] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffcb842f8e7 [ 39.298549][ C0] R13: 00007ffcb842fb00 R14: 00007ffcb842f8e0 R15: 00007f0388d7e000 [ 39.298818][ C0] [ 259.189185][ T2127] netem: version 1.3