[ 72.561621][ T1431] ip (1431) used greatest stack depth: 23616 bytes left [ 78.296596][ C2] [ 78.296699][ C2] ======================================================== [ 78.296925][ C2] WARNING: possible irq lock inversion dependency detected [ 78.297149][ C2] 6.9.0-rc1-virtme #1 Not tainted [ 78.297309][ C2] -------------------------------------------------------- [ 78.297539][ C2] grep/1478 just changed the state of lock: [ 78.297726][ C2] ffff888009ce8d80 (&ndev->lock){++-.}-{2:2}, at: addrconf_rs_timer+0xa9/0x730 [ 78.297999][ C2] but this lock took another, SOFTIRQ-unsafe lock in the past: [ 78.298223][ C2] (&p->alloc_lock){+.+.}-{2:2} [ 78.298227][ C2] [ 78.298227][ C2] [ 78.298227][ C2] and interrupts could create inverse lock ordering between them. [ 78.298227][ C2] [ 78.298776][ C2] [ 78.298776][ C2] other info that might help us debug this: [ 78.298999][ C2] Possible interrupt unsafe locking scenario: [ 78.298999][ C2] [ 78.299227][ C2] CPU0 CPU1 [ 78.299378][ C2] ---- ---- [ 78.299538][ C2] lock(&p->alloc_lock); [ 78.299654][ C2] local_irq_disable(); [ 78.299840][ C2] lock(&ndev->lock); [ 78.300027][ C2] lock(&p->alloc_lock); [ 78.300217][ C2] [ 78.300331][ C2] lock(&ndev->lock); [ 78.300449][ C2] [ 78.300449][ C2] *** DEADLOCK *** [ 78.300449][ C2] [ 78.300673][ C2] 1 lock held by grep/1478: [ 78.300825][ C2] #0: ffffc90000230d68 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xe8/0x230 [ 78.301117][ C2] [ 78.301117][ C2] the shortest dependencies between 2nd lock and 1st lock: [ 78.301380][ C2] -> (&p->alloc_lock){+.+.}-{2:2} { [ 78.301536][ C2] HARDIRQ-ON-W at: [ 78.301655][ C2] __lock_acquire+0x797/0x1570 [ 78.301853][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.302044][ C2] _raw_spin_lock+0x30/0x40 [ 78.302236][ C2] set_mems_allowed+0x1d/0x210 [ 78.302427][ C2] kernel_init_freeable+0x72/0x310 [ 78.302623][ C2] kernel_init+0x20/0x200 [ 78.302817][ C2] ret_from_fork+0x31/0x70 [ 78.303010][ C2] ret_from_fork_asm+0x1a/0x30 [ 78.303201][ C2] SOFTIRQ-ON-W at: [ 78.303315][ C2] __lock_acquire+0x797/0x1570 [ 78.303505][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.303697][ C2] _raw_spin_lock+0x30/0x40 [ 78.303887][ C2] set_mems_allowed+0x1d/0x210 [ 78.304082][ C2] kernel_init_freeable+0x72/0x310 [ 78.304273][ C2] kernel_init+0x20/0x200 [ 78.304466][ C2] ret_from_fork+0x31/0x70 [ 78.304658][ C2] ret_from_fork_asm+0x1a/0x30 [ 78.304849][ C2] INITIAL USE at: [ 78.304965][ C2] __lock_acquire+0x797/0x1570 [ 78.305158][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.305347][ C2] _raw_spin_lock+0x30/0x40 [ 78.305538][ C2] set_mems_allowed+0x1d/0x210 [ 78.305731][ C2] kernel_init_freeable+0x72/0x310 [ 78.305920][ C2] kernel_init+0x20/0x200 [ 78.306109][ C2] ret_from_fork+0x31/0x70 [ 78.306305][ C2] ret_from_fork_asm+0x1a/0x30 [ 78.306495][ C2] } [ 78.306574][ C2] ... key at: [] __key.387+0x0/0x40 [ 78.306803][ C2] ... acquired at: [ 78.306927][ C2] __lock_acquire+0xaf0/0x1570 [ 78.307082][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.307233][ C2] _raw_spin_lock+0x30/0x40 [ 78.307387][ C2] __get_task_comm+0x27/0x70 [ 78.307545][ C2] ref_tracker_alloc+0x2ee/0x490 [ 78.307702][ C2] netdev_get_by_index+0x5e/0x80 [ 78.307857][ C2] fib6_nh_init+0x3d8/0x15b0 [ 78.308011][ C2] ip6_route_info_create+0xf18/0x17d0 [ 78.308163][ C2] ip6_route_add+0x1c/0x140 [ 78.308317][ C2] addrconf_prefix_route+0x1cc/0x2b0 [ 78.308471][ C2] addrconf_permanent_addr+0x32f/0x670 [ 78.308623][ C2] addrconf_notify+0x749/0xd60 [ 78.308778][ C2] notifier_call_chain+0xcd/0x150 [ 78.308931][ C2] __dev_notify_flags+0xe6/0x250 [ 78.309085][ C2] dev_change_flags+0xec/0x160 [ 78.309244][ C2] do_setlink+0x7d6/0x21e0 [ 78.309398][ C2] __rtnl_newlink+0xaa7/0xd80 [ 78.309553][ C2] rtnl_newlink+0x63/0xa0 [ 78.309706][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 78.309858][ C2] netlink_rcv_skb+0x130/0x360 [ 78.310016][ C2] netlink_unicast+0x449/0x710 [ 78.310171][ C2] netlink_sendmsg+0x723/0xbe0 [ 78.310325][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 78.310478][ C2] ___sys_sendmsg+0xee/0x170 [ 78.310631][ C2] __sys_sendmsg+0xcd/0x170 [ 78.310782][ C2] do_syscall_64+0xc6/0x1e0 [ 78.310936][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.311136][ C2] [ 78.311214][ C2] -> (&ndev->lock){++-.}-{2:2} { [ 78.311370][ C2] HARDIRQ-ON-W at: [ 78.311488][ C2] __lock_acquire+0x797/0x1570 [ 78.311681][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.311871][ C2] _raw_write_lock_bh+0x38/0x50 [ 78.312061][ C2] addrconf_permanent_addr+0x6e/0x670 [ 78.312253][ C2] addrconf_notify+0x749/0xd60 [ 78.312445][ C2] notifier_call_chain+0xcd/0x150 [ 78.312638][ C2] __dev_notify_flags+0xe6/0x250 [ 78.312828][ C2] dev_change_flags+0xec/0x160 [ 78.313117][ C2] do_setlink+0x7d6/0x21e0 [ 78.313307][ C2] __rtnl_newlink+0xaa7/0xd80 [ 78.313497][ C2] rtnl_newlink+0x63/0xa0 [ 78.313786][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 78.313979][ C2] netlink_rcv_skb+0x130/0x360 [ 78.314169][ C2] netlink_unicast+0x449/0x710 [ 78.314459][ C2] netlink_sendmsg+0x723/0xbe0 [ 78.314650][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 78.314840][ C2] ___sys_sendmsg+0xee/0x170 [ 78.315029][ C2] __sys_sendmsg+0xcd/0x170 [ 78.315319][ C2] do_syscall_64+0xc6/0x1e0 [ 78.315513][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.315740][ C2] HARDIRQ-ON-R at: [ 78.315951][ C2] __lock_acquire+0x797/0x1570 [ 78.316143][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.316333][ C2] _raw_read_lock_bh+0x44/0x80 [ 78.316525][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 78.316813][ C2] inet6_fill_link_af+0x5e/0xe0 [ 78.317007][ C2] rtnl_fill_ifinfo+0x1612/0x29e0 [ 78.317197][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 78.317593][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 78.317821][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 78.318010][ C2] register_netdevice+0x1177/0x1690 [ 78.318200][ C2] register_netdev+0x20/0x40 [ 78.318394][ C2] sit_init_net+0x250/0x4f0 [ 78.318585][ C2] ops_init+0x9b/0x560 [ 78.318739][ C2] register_pernet_operations+0x2db/0x710 [ 78.318966][ C2] register_pernet_device+0x2a/0x60 [ 78.319155][ C2] sit_init+0x23/0xe0 [ 78.319307][ C2] do_one_initcall+0x8d/0x1e0 [ 78.319601][ C2] do_initcalls+0x1b2/0x3e0 [ 78.319792][ C2] kernel_init_freeable+0x232/0x310 [ 78.319981][ C2] kernel_init+0x20/0x200 [ 78.320170][ C2] ret_from_fork+0x31/0x70 [ 78.320361][ C2] ret_from_fork_asm+0x1a/0x30 [ 78.320549][ C2] IN-SOFTIRQ-W at: [ 78.320664][ C2] __lock_acquire+0x797/0x1570 [ 78.320858][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.321151][ C2] _raw_write_lock+0x30/0x40 [ 78.321341][ C2] addrconf_rs_timer+0xa9/0x730 [ 78.321530][ C2] call_timer_fn+0x13b/0x230 [ 78.321818][ C2] __run_timers+0x545/0x810 [ 78.322006][ C2] run_timer_softirq+0xe8/0x1b0 [ 78.322197][ C2] __do_softirq+0x1f8/0x5df [ 78.322485][ C2] irq_exit_rcu+0x97/0xc0 [ 78.322675][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 78.322906][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 78.323134][ C2] _raw_spin_unlock_irqrestore+0x43/0x70 [ 78.323360][ C2] get_partial_node.part.0+0x1c5/0x3a0 [ 78.323555][ C2] ___slab_alloc+0xb70/0x10a0 [ 78.323744][ C2] __kmalloc+0x34c/0x3c0 [ 78.324030][ C2] p9_fcall_init+0x7d/0x1b0 [ 78.324220][ C2] p9_tag_alloc+0x1bd/0x700 [ 78.324409][ C2] p9_client_prepare_req+0xe6/0x290 [ 78.324695][ C2] p9_client_rpc+0x18d/0x930 [ 78.324891][ C2] p9_client_clunk+0x74/0xe0 [ 78.325083][ C2] v9fs_dentry_release+0xb9/0x140 [ 78.325273][ C2] __dentry_kill+0x1d9/0x4f0 [ 78.325465][ C2] dput.part.0+0x333/0x6c0 [ 78.325655][ C2] walk_component+0x199/0x4f0 [ 78.325844][ C2] link_path_walk.part.0.constprop.0+0x494/0x9f0 [ 78.326167][ C2] path_openat+0x1be/0x440 [ 78.326361][ C2] do_filp_open+0x1b3/0x3e0 [ 78.326550][ C2] do_sys_openat2+0x122/0x160 [ 78.326835][ C2] __x64_sys_openat+0x123/0x1e0 [ 78.327024][ C2] do_syscall_64+0xc6/0x1e0 [ 78.327218][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.327544][ C2] INITIAL USE at: [ 78.327659][ C2] __lock_acquire+0x797/0x1570 [ 78.327852][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.328043][ C2] _raw_write_lock_bh+0x38/0x50 [ 78.328234][ C2] addrconf_permanent_addr+0x6e/0x670 [ 78.328422][ C2] addrconf_notify+0x749/0xd60 [ 78.328611][ C2] notifier_call_chain+0xcd/0x150 [ 78.328997][ C2] __dev_notify_flags+0xe6/0x250 [ 78.329191][ C2] dev_change_flags+0xec/0x160 [ 78.329382][ C2] do_setlink+0x7d6/0x21e0 [ 78.329581][ C2] __rtnl_newlink+0xaa7/0xd80 [ 78.329867][ C2] rtnl_newlink+0x63/0xa0 [ 78.330057][ C2] rtnetlink_rcv_msg+0x2fb/0xbf0 [ 78.330246][ C2] netlink_rcv_skb+0x130/0x360 [ 78.330534][ C2] netlink_unicast+0x449/0x710 [ 78.330727][ C2] netlink_sendmsg+0x723/0xbe0 [ 78.330917][ C2] ____sys_sendmsg+0x7b2/0xa10 [ 78.331121][ C2] ___sys_sendmsg+0xee/0x170 [ 78.331311][ C2] __sys_sendmsg+0xcd/0x170 [ 78.331500][ C2] do_syscall_64+0xc6/0x1e0 [ 78.331690][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.332013][ C2] INITIAL READ USE at: [ 78.332132][ C2] __lock_acquire+0x797/0x1570 [ 78.332324][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.332514][ C2] _raw_read_lock_bh+0x44/0x80 [ 78.332803][ C2] inet6_fill_ifla6_attrs+0x516/0x740 [ 78.333029][ C2] inet6_fill_link_af+0x5e/0xe0 [ 78.333217][ C2] rtnl_fill_ifinfo+0x1612/0x29e0 [ 78.333508][ C2] rtmsg_ifinfo_build_skb+0x13c/0x240 [ 78.333735][ C2] rtmsg_ifinfo_event.part.0+0x2d/0x120 [ 78.333962][ C2] rtmsg_ifinfo+0x5b/0xa0 [ 78.334249][ C2] register_netdevice+0x1177/0x1690 [ 78.334476][ C2] register_netdev+0x20/0x40 [ 78.334670][ C2] sit_init_net+0x250/0x4f0 [ 78.334958][ C2] ops_init+0x9b/0x560 [ 78.335147][ C2] register_pernet_operations+0x2db/0x710 [ 78.335374][ C2] register_pernet_device+0x2a/0x60 [ 78.335697][ C2] sit_init+0x23/0xe0 [ 78.335887][ C2] do_one_initcall+0x8d/0x1e0 [ 78.336081][ C2] do_initcalls+0x1b2/0x3e0 [ 78.336367][ C2] kernel_init_freeable+0x232/0x310 [ 78.336595][ C2] kernel_init+0x20/0x200 [ 78.336789][ C2] ret_from_fork+0x31/0x70 [ 78.336983][ C2] ret_from_fork_asm+0x1a/0x30 [ 78.337271][ C2] } [ 78.337348][ C2] ... key at: [] __key.36+0x0/0x40 [ 78.337576][ C2] ... acquired at: [ 78.337688][ C2] mark_lock+0x28d/0x3e0 [ 78.337935][ C2] mark_usage+0xd9/0x2a0 [ 78.338087][ C2] __lock_acquire+0x797/0x1570 [ 78.338239][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.338391][ C2] _raw_write_lock+0x30/0x40 [ 78.338639][ C2] addrconf_rs_timer+0xa9/0x730 [ 78.338791][ C2] call_timer_fn+0x13b/0x230 [ 78.338942][ C2] __run_timers+0x545/0x810 [ 78.339097][ C2] run_timer_softirq+0xe8/0x1b0 [ 78.339249][ C2] __do_softirq+0x1f8/0x5df [ 78.339402][ C2] irq_exit_rcu+0x97/0xc0 [ 78.339553][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 78.339742][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 78.340028][ C2] _raw_spin_unlock_irqrestore+0x43/0x70 [ 78.340216][ C2] get_partial_node.part.0+0x1c5/0x3a0 [ 78.340368][ C2] ___slab_alloc+0xb70/0x10a0 [ 78.340522][ C2] __kmalloc+0x34c/0x3c0 [ 78.340863][ C2] p9_fcall_init+0x7d/0x1b0 [ 78.341020][ C2] p9_tag_alloc+0x1bd/0x700 [ 78.341182][ C2] p9_client_prepare_req+0xe6/0x290 [ 78.341333][ C2] p9_client_rpc+0x18d/0x930 [ 78.341589][ C2] p9_client_clunk+0x74/0xe0 [ 78.341740][ C2] v9fs_dentry_release+0xb9/0x140 [ 78.341892][ C2] __dentry_kill+0x1d9/0x4f0 [ 78.342047][ C2] dput.part.0+0x333/0x6c0 [ 78.342199][ C2] walk_component+0x199/0x4f0 [ 78.342350][ C2] link_path_walk.part.0.constprop.0+0x494/0x9f0 [ 78.342537][ C2] path_openat+0x1be/0x440 [ 78.342688][ C2] do_filp_open+0x1b3/0x3e0 [ 78.342839][ C2] do_sys_openat2+0x122/0x160 [ 78.342991][ C2] __x64_sys_openat+0x123/0x1e0 [ 78.343141][ C2] do_syscall_64+0xc6/0x1e0 [ 78.343296][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.343487][ C2] [ 78.343666][ C2] [ 78.343666][ C2] stack backtrace: [ 78.343853][ C2] CPU: 2 PID: 1478 Comm: grep Not tainted 6.9.0-rc1-virtme #1 [ 78.344080][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 78.344510][ C2] Call Trace: [ 78.344631][ C2] [ 78.344711][ C2] dump_stack_lvl+0x82/0xd0 [ 78.344870][ C2] print_irq_inversion_bug.part.0+0x3d9/0x570 [ 78.345154][ C2] ? kernel_text_address+0xce/0xe0 [ 78.345308][ C2] ? __pfx_print_irq_inversion_bug.part.0+0x10/0x10 [ 78.345496][ C2] ? __pfx_usage_skip+0x10/0x10 [ 78.345647][ C2] ? __pfx_usage_match+0x10/0x10 [ 78.345892][ C2] ? arch_stack_walk+0xa2/0xf0 [ 78.346043][ C2] mark_lock_irq+0x4cd/0xa10 [ 78.346195][ C2] ? __pfx_mark_lock_irq+0x10/0x10 [ 78.346350][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 78.346603][ C2] ? save_trace+0x8f/0x5b0 [ 78.346756][ C2] mark_lock+0x28d/0x3e0 [ 78.346871][ C2] ? __pfx_stack_trace_save+0x10/0x10 [ 78.347022][ C2] mark_usage+0xd9/0x2a0 [ 78.347137][ C2] __lock_acquire+0x797/0x1570 [ 78.347290][ C2] ? __pfx_validate_chain+0x10/0x10 [ 78.347441][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 78.347596][ C2] lock_acquire.part.0+0xeb/0x330 [ 78.347747][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 78.347994][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 78.348146][ C2] ? trace_lock_acquire+0x135/0x1c0 [ 78.348298][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 78.348447][ C2] ? lock_acquire+0x32/0xc0 [ 78.348598][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 78.348846][ C2] _raw_write_lock+0x30/0x40 [ 78.349000][ C2] ? addrconf_rs_timer+0xa9/0x730 [ 78.349150][ C2] addrconf_rs_timer+0xa9/0x730 [ 78.349301][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 78.349550][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 78.349701][ C2] ? call_timer_fn+0xe8/0x230 [ 78.349854][ C2] ? lock_acquire+0x32/0xc0 [ 78.350004][ C2] ? call_timer_fn+0xe8/0x230 [ 78.350156][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 78.350307][ C2] call_timer_fn+0x13b/0x230 [ 78.350469][ C2] ? call_timer_fn+0xe8/0x230 [ 78.350619][ C2] ? call_timer_fn+0xe8/0x230 [ 78.350867][ C2] ? __pfx_call_timer_fn+0x10/0x10 [ 78.351027][ C2] __run_timers+0x545/0x810 [ 78.351188][ C2] ? __pfx_addrconf_rs_timer+0x10/0x10 [ 78.351341][ C2] ? __pfx___run_timers+0x10/0x10 [ 78.351496][ C2] ? do_raw_spin_lock+0x131/0x270 [ 78.351744][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 78.351897][ C2] ? lock_acquire+0x32/0xc0 [ 78.352048][ C2] ? run_timer_softirq+0xe0/0x1b0 [ 78.352200][ C2] run_timer_softirq+0xe8/0x1b0 [ 78.352542][ C2] __do_softirq+0x1f8/0x5df [ 78.352695][ C2] irq_exit_rcu+0x97/0xc0 [ 78.352809][ C2] sysvec_apic_timer_interrupt+0x75/0x80 [ 78.352961][ C2] [ 78.353038][ C2] [ 78.353209][ C2] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 78.353401][ C2] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 78.353595][ C2] Code: 10 e8 41 da 91 fd 48 89 ef e8 79 4a 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 51 86 4f <74> 0e 5b 5d c3 cc cc cc cc e8 6f 44 b5 fd eb dc 0f 1f 44 00 00 5b [ 78.354234][ C2] RSP: 0018:ffffc900018cf440 EFLAGS: 00000282 [ 78.354426][ C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff646df29 [ 78.354753][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb07d77f1 [ 78.354981][ C2] RBP: ffff888001041080 R08: 0000000000000001 R09: fffffbfff646e7aa [ 78.355213][ C2] R10: ffffffffb2373d57 R11: 0000000000001000 R12: ffff888001041080 [ 78.355536][ C2] R13: ffffea000017b600 R14: ffff8880010433c0 R15: ffff888005ed9000 [ 78.355766][ C2] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 78.355957][ C2] get_partial_node.part.0+0x1c5/0x3a0 [ 78.356209][ C2] ___slab_alloc+0xb70/0x10a0 [ 78.356358][ C2] ? fs_reclaim_acquire+0xb3/0x170 [ 78.356510][ C2] ? p9_fcall_init+0x7d/0x1b0 [ 78.356662][ C2] ? __pfx___lock_release+0x10/0x10 [ 78.356816][ C2] ? p9_fcall_init+0x7d/0x1b0 [ 78.357061][ C2] ? __kmalloc+0x34c/0x3c0 [ 78.357211][ C2] __kmalloc+0x34c/0x3c0 [ 78.357326][ C2] p9_fcall_init+0x7d/0x1b0 [ 78.357482][ C2] p9_tag_alloc+0x1bd/0x700 [ 78.357727][ C2] ? __pfx_p9_tag_alloc+0x10/0x10 [ 78.357880][ C2] ? validate_chain+0x130/0x9b0 [ 78.358031][ C2] ? hlock_class+0x4e/0x130 [ 78.358181][ C2] p9_client_prepare_req+0xe6/0x290 [ 78.358428][ C2] ? hlock_class+0x4e/0x130 [ 78.358579][ C2] ? __pfx_p9_client_prepare_req+0x10/0x10 [ 78.358772][ C2] ? __lock_acquire+0xaf0/0x1570 [ 78.358928][ C2] p9_client_rpc+0x18d/0x930 [ 78.359175][ C2] ? __pfx_p9_client_rpc+0x10/0x10 [ 78.359328][ C2] ? __lock_release+0x103/0x460 [ 78.359479][ C2] ? list_lru_add+0x76/0x250 [ 78.359630][ C2] ? __pfx___lock_release+0x10/0x10 [ 78.359780][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 78.360028][ C2] ? find_held_lock+0x2c/0x110 [ 78.360178][ C2] ? __lock_release+0x103/0x460 [ 78.360328][ C2] ? __pfx___lock_release+0x10/0x10 [ 78.360483][ C2] p9_client_clunk+0x74/0xe0 [ 78.360733][ C2] v9fs_dentry_release+0xb9/0x140 [ 78.360888][ C2] __dentry_kill+0x1d9/0x4f0 [ 78.361045][ C2] ? __pfx_kfree_link+0x10/0x10 [ 78.361217][ C2] dput.part.0+0x333/0x6c0 [ 78.361464][ C2] walk_component+0x199/0x4f0 [ 78.361616][ C2] link_path_walk.part.0.constprop.0+0x494/0x9f0 [ 78.361806][ C2] ? __pfx_link_path_walk.part.0.constprop.0+0x10/0x10 [ 78.361998][ C2] path_openat+0x1be/0x440 [ 78.362245][ C2] ? __pfx_path_openat+0x10/0x10 [ 78.362396][ C2] ? __lock_acquire+0xaf0/0x1570 [ 78.362549][ C2] do_filp_open+0x1b3/0x3e0 [ 78.362700][ C2] ? __pfx_do_filp_open+0x10/0x10 [ 78.362945][ C2] ? find_held_lock+0x2c/0x110 [ 78.363098][ C2] ? __pfx_kfree_link+0x10/0x10 [ 78.363249][ C2] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 78.363400][ C2] ? alloc_fd+0x1f5/0x650 [ 78.363518][ C2] ? do_raw_spin_unlock+0x58/0x220 [ 78.363765][ C2] ? _raw_spin_unlock+0x23/0x40 [ 78.363916][ C2] ? alloc_fd+0x1f5/0x650 [ 78.364032][ C2] do_sys_openat2+0x122/0x160 [ 78.364181][ C2] ? vfs_fstatat+0x9e/0xc0 [ 78.364523][ C2] ? __pfx_do_sys_openat2+0x10/0x10 [ 78.364674][ C2] ? __pfx___do_sys_newfstatat+0x10/0x10 [ 78.364826][ C2] __x64_sys_openat+0x123/0x1e0 [ 78.364987][ C2] ? __pfx___x64_sys_openat+0x10/0x10 [ 78.365139][ C2] ? __pfx_do_faccessat+0x10/0x10 [ 78.365293][ C2] do_syscall_64+0xc6/0x1e0 [ 78.365454][ C2] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 78.365641][ C2] RIP: 0033:0x7f15ee6cd0e8 [ 78.365895][ C2] 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 [ 78.366433][ C2] RSP: 002b:00007ffe0c95c8f8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 [ 78.366759][ C2] RAX: ffffffffffffffda RBX: 00007ffe0c95cb8f RCX: 00007f15ee6cd0e8 [ 78.366984][ C2] RDX: 0000000000080000 RSI: 00007ffe0c95c970 RDI: 00000000ffffff9c [ 78.367207][ C2] RBP: 00007ffe0c95c960 R08: 0000000000080000 R09: 00007ffe0c95c970 [ 78.367532][ C2] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe0c95c977 [ 78.367758][ C2] R13: 00007ffe0c95cba0 R14: 00007ffe0c95c970 R15: 00007f15ee69e000 [ 78.367987][ C2] [ 278.509188][ T3289] netem: version 1.3