[ 11.312399][ T248] 8021q: 802.1Q VLAN Support v1.8 [ 11.576786][ T259] gre: GRE over IPv4 demultiplexer driver [ 11.587033][ T259] ip_gre: GRE over IPv4 tunneling driver [ 13.121510][ T317] GACT probability NOT on [ 33.830839][ T471] [ 33.830935][ T471] ======================================================== [ 33.831049][ T471] WARNING: possible irq lock inversion dependency detected [ 33.831153][ T471] 7.1.0-rc5-virtme #1 Not tainted [ 33.831222][ T471] -------------------------------------------------------- [ 33.831326][ T471] sysctl/471 just changed the state of lock: [ 33.831411][ T471] ffffffffad77e8b8 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.831539][ T471] but this lock was taken by another, SOFTIRQ-safe lock in the past: [ 33.831645][ T471] (&ndev->lock){++-.}-{3:3} [ 33.831648][ T471] [ 33.831648][ T471] [ 33.831648][ T471] and interrupts could create inverse lock ordering between them. [ 33.831648][ T471] [ 33.831902][ T471] [ 33.831902][ T471] other info that might help us debug this: [ 33.832002][ T471] Possible interrupt unsafe locking scenario: [ 33.832002][ T471] [ 33.832106][ T471] CPU0 CPU1 [ 33.832173][ T471] ---- ---- [ 33.832246][ T471] lock(acaddr_hash_lock); [ 33.832317][ T471] local_irq_disable(); [ 33.832402][ T471] lock(&ndev->lock); [ 33.832487][ T471] lock(acaddr_hash_lock); [ 33.832582][ T471] [ 33.832636][ T471] lock(&ndev->lock); [ 33.832695][ T471] [ 33.832695][ T471] *** DEADLOCK *** [ 33.832695][ T471] [ 33.832795][ T471] 2 locks held by sysctl/471: [ 33.832865][ T471] #0: ff11000009c713e0 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x116/0x250 [ 33.832995][ T471] #1: ffffffffad68c9c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_fixup_forwarding+0x4d/0x4d0 [ 33.833136][ T471] [ 33.833136][ T471] the shortest dependencies between 2nd lock and 1st lock: [ 33.833256][ T471] -> (&ndev->lock){++-.}-{3:3} { [ 33.833332][ T471] HARDIRQ-ON-W at: [ 33.833385][ T471] __lock_acquire+0x378/0xc10 [ 33.833474][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.833562][ T471] _raw_write_lock_bh+0x38/0x50 [ 33.833658][ T471] addrconf_permanent_addr+0x108/0x9c0 [ 33.833759][ T471] addrconf_notify+0x151/0xf30 [ 33.833845][ T471] notifier_call_chain+0xb0/0x320 [ 33.833938][ T471] __dev_notify_flags+0xde/0x280 [ 33.834029][ T471] netif_change_flags+0xfe/0x190 [ 33.834116][ T471] do_setlink.isra.0+0x1cc3/0x2750 [ 33.834204][ T471] rtnl_newlink+0x8d1/0xef0 [ 33.834292][ T471] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 33.834379][ T471] netlink_rcv_skb+0x14e/0x3a0 [ 33.834468][ T471] netlink_unicast+0x486/0x750 [ 33.834553][ T471] netlink_sendmsg+0x735/0xc60 [ 33.834651][ T471] ____sys_sendmsg+0x419/0x850 [ 33.834740][ T471] ___sys_sendmsg+0x14e/0x1d0 [ 33.834834][ T471] __sys_sendmsg+0x145/0x1f0 [ 33.834920][ T471] do_syscall_64+0x117/0x590 [ 33.835013][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.835117][ T471] HARDIRQ-ON-R at: [ 33.835169][ T471] __lock_acquire+0x378/0xc10 [ 33.835257][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.835348][ T471] _raw_read_lock_bh+0x44/0x80 [ 33.835434][ T471] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 33.835536][ T471] inet6_fill_link_af+0x5c/0xe0 [ 33.835639][ T471] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 33.835747][ T471] rtnl_getlink+0x9c9/0xeb0 [ 33.835837][ T471] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 33.835923][ T471] netlink_rcv_skb+0x14e/0x3a0 [ 33.836014][ T471] netlink_unicast+0x486/0x750 [ 33.836104][ T471] netlink_sendmsg+0x735/0xc60 [ 33.836190][ T471] ____sys_sendmsg+0x419/0x850 [ 33.836280][ T471] ___sys_sendmsg+0x14e/0x1d0 [ 33.836369][ T471] __sys_sendmsg+0x145/0x1f0 [ 33.836456][ T471] do_syscall_64+0x117/0x590 [ 33.836548][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.836657][ T471] IN-SOFTIRQ-W at: [ 33.836708][ T471] __lock_acquire+0x378/0xc10 [ 33.836794][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.836880][ T471] _raw_write_lock+0x33/0x40 [ 33.836966][ T471] addrconf_rs_timer+0xb0/0x770 [ 33.837053][ T471] call_timer_fn+0x163/0x4f0 [ 33.837142][ T471] __run_timers+0x68f/0xab0 [ 33.837228][ T471] run_timer_softirq+0xf0/0x160 [ 33.837315][ T471] handle_softirqs+0x1d8/0x940 [ 33.837401][ T471] __irq_exit_rcu+0x103/0x1c0 [ 33.837489][ T471] irq_exit_rcu+0xe/0x30 [ 33.837583][ T471] sysvec_apic_timer_interrupt+0x9d/0xe0 [ 33.837689][ T471] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 33.837791][ T471] pv_native_safe_halt+0xf/0x10 [ 33.837877][ T471] default_idle+0x9/0x10 [ 33.837965][ T471] default_idle_call+0x6e/0xb0 [ 33.838052][ T471] cpuidle_idle_call.constprop.0+0x237/0x410 [ 33.838157][ T471] do_idle+0xf5/0x160 [ 33.838243][ T471] cpu_startup_entry+0x53/0x70 [ 33.838329][ T471] rest_init+0x1f7/0x200 [ 33.838415][ T471] start_kernel+0x3ad/0x3b0 [ 33.838505][ T471] x86_64_start_reservations+0x24/0x30 [ 33.838617][ T471] x86_64_start_kernel+0x12b/0x130 [ 33.838704][ T471] common_startup_64+0x13e/0x148 [ 33.838791][ T471] INITIAL USE at: [ 33.838842][ T471] __lock_acquire+0x378/0xc10 [ 33.838927][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.839015][ T471] _raw_write_lock_bh+0x38/0x50 [ 33.839100][ T471] addrconf_permanent_addr+0x108/0x9c0 [ 33.839201][ T471] addrconf_notify+0x151/0xf30 [ 33.839287][ T471] notifier_call_chain+0xb0/0x320 [ 33.839371][ T471] __dev_notify_flags+0xde/0x280 [ 33.839463][ T471] netif_change_flags+0xfe/0x190 [ 33.839548][ T471] do_setlink.isra.0+0x1cc3/0x2750 [ 33.839639][ T471] rtnl_newlink+0x8d1/0xef0 [ 33.839724][ T471] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 33.839810][ T471] netlink_rcv_skb+0x14e/0x3a0 [ 33.839897][ T471] netlink_unicast+0x486/0x750 [ 33.839981][ T471] netlink_sendmsg+0x735/0xc60 [ 33.840066][ T471] ____sys_sendmsg+0x419/0x850 [ 33.840151][ T471] ___sys_sendmsg+0x14e/0x1d0 [ 33.840240][ T471] __sys_sendmsg+0x145/0x1f0 [ 33.840325][ T471] do_syscall_64+0x117/0x590 [ 33.840413][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.840516][ T471] INITIAL READ USE at: [ 33.840592][ T471] __lock_acquire+0x378/0xc10 [ 33.840680][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.840781][ T471] _raw_read_lock_bh+0x44/0x80 [ 33.840868][ T471] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 33.840974][ T471] inet6_fill_link_af+0x5c/0xe0 [ 33.841059][ T471] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 33.841208][ T471] rtnl_getlink+0x9c9/0xeb0 [ 33.841293][ T471] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 33.841381][ T471] netlink_rcv_skb+0x14e/0x3a0 [ 33.841508][ T471] netlink_unicast+0x486/0x750 [ 33.841598][ T471] netlink_sendmsg+0x735/0xc60 [ 33.841683][ T471] ____sys_sendmsg+0x419/0x850 [ 33.841810][ T471] ___sys_sendmsg+0x14e/0x1d0 [ 33.841896][ T471] __sys_sendmsg+0x145/0x1f0 [ 33.841983][ T471] do_syscall_64+0x117/0x590 [ 33.842110][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.842211][ T471] } [ 33.842248][ T471] ... key at: [] __key.37+0x0/0x40 [ 33.842351][ T471] ... acquired at: [ 33.842447][ T471] __lock_acquire+0x508/0xc10 [ 33.842515][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.842590][ T471] _raw_spin_lock+0x33/0x40 [ 33.842657][ T471] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 33.842784][ T471] __ipv6_dev_ac_inc+0x57e/0x930 [ 33.842851][ T471] addrconf_join_anycast+0x1bc/0x260 [ 33.842919][ T471] dev_forward_change+0x2be/0x850 [ 33.842988][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.843113][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.843181][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.843251][ T471] new_sync_write+0x333/0x750 [ 33.843358][ T471] vfs_write+0x6a4/0xc10 [ 33.843427][ T471] ksys_write+0x116/0x250 [ 33.843496][ T471] do_syscall_64+0x117/0x590 [ 33.843565][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.843653][ T471] [ 33.843689][ T471] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 33.843759][ T471] HARDIRQ-ON-W at: [ 33.843811][ T471] __lock_acquire+0x378/0xc10 [ 33.843896][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.844024][ T471] _raw_spin_lock+0x33/0x40 [ 33.844112][ T471] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 33.844213][ T471] __ipv6_dev_ac_inc+0x57e/0x930 [ 33.844339][ T471] addrconf_join_anycast+0x1bc/0x260 [ 33.844425][ T471] dev_forward_change+0x2be/0x850 [ 33.844510][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.844663][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.844748][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.844834][ T471] new_sync_write+0x333/0x750 [ 33.844960][ T471] vfs_write+0x6a4/0xc10 [ 33.845044][ T471] ksys_write+0x116/0x250 [ 33.845134][ T471] do_syscall_64+0x117/0x590 [ 33.845261][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.845360][ T471] SOFTIRQ-ON-W at: [ 33.845410][ T471] __lock_acquire+0x378/0xc10 [ 33.845535][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.845625][ T471] _raw_spin_lock+0x33/0x40 [ 33.845717][ T471] __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.845801][ T471] addrconf_leave_anycast+0x1bc/0x260 [ 33.845927][ T471] dev_forward_change+0x3b3/0x850 [ 33.846012][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.846113][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.846242][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.846327][ T471] new_sync_write+0x333/0x750 [ 33.846410][ T471] vfs_write+0x6a4/0xc10 [ 33.846539][ T471] ksys_write+0x116/0x250 [ 33.846627][ T471] do_syscall_64+0x117/0x590 [ 33.846710][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.846854][ T471] INITIAL USE at: [ 33.846904][ T471] __lock_acquire+0x378/0xc10 [ 33.846991][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.847118][ T471] _raw_spin_lock+0x33/0x40 [ 33.847204][ T471] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 33.847304][ T471] __ipv6_dev_ac_inc+0x57e/0x930 [ 33.847431][ T471] addrconf_join_anycast+0x1bc/0x260 [ 33.847515][ T471] dev_forward_change+0x2be/0x850 [ 33.847607][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.847750][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.847835][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.847920][ T471] new_sync_write+0x333/0x750 [ 33.848003][ T471] vfs_write+0x6a4/0xc10 [ 33.848132][ T471] ksys_write+0x116/0x250 [ 33.848216][ T471] do_syscall_64+0x117/0x590 [ 33.848304][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.848449][ T471] } [ 33.848484][ T471] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 33.848593][ T471] ... acquired at: [ 33.848643][ T471] mark_lock+0x1d7/0xa00 [ 33.848709][ T471] mark_usage+0x105/0x170 [ 33.848777][ T471] __lock_acquire+0x378/0xc10 [ 33.848848][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.848915][ T471] _raw_spin_lock+0x33/0x40 [ 33.849024][ T471] __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.849093][ T471] addrconf_leave_anycast+0x1bc/0x260 [ 33.849160][ T471] dev_forward_change+0x3b3/0x850 [ 33.849229][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.849354][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.849421][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.849488][ T471] new_sync_write+0x333/0x750 [ 33.849603][ T471] vfs_write+0x6a4/0xc10 [ 33.849671][ T471] ksys_write+0x116/0x250 [ 33.849737][ T471] do_syscall_64+0x117/0x590 [ 33.849804][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.849929][ T471] [ 33.849963][ T471] [ 33.849963][ T471] stack backtrace: [ 33.850049][ T471] CPU: 3 UID: 0 PID: 471 Comm: sysctl Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 33.850052][ T471] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 33.850054][ T471] Call Trace: [ 33.850056][ T471] [ 33.850057][ T471] dump_stack_lvl+0x6f/0xa0 [ 33.850062][ T471] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 33.850065][ T471] mark_lock_irq+0x989/0x9c0 [ 33.850068][ T471] mark_lock+0x1d7/0xa00 [ 33.850069][ T471] mark_usage+0x105/0x170 [ 33.850071][ T471] __lock_acquire+0x378/0xc10 [ 33.850073][ T471] lock_acquire.part.0+0xbc/0x260 [ 33.850074][ T471] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.850076][ T471] ? rcu_is_watching+0x15/0xd0 [ 33.850079][ T471] ? do_raw_read_unlock+0x70/0x70 [ 33.850081][ T471] ? lock_acquire+0x134/0x160 [ 33.850082][ T471] _raw_spin_lock+0x33/0x40 [ 33.850084][ T471] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.850085][ T471] __ipv6_dev_ac_dec+0x236/0x5d0 [ 33.850087][ T471] addrconf_leave_anycast+0x1bc/0x260 [ 33.850089][ T471] ? find_held_lock+0x2b/0x80 [ 33.850092][ T471] ? __ipv6_isatap_ifid+0x210/0x210 [ 33.850094][ T471] ? mark_held_locks+0x40/0x70 [ 33.850095][ T471] ? lockdep_hardirqs_on+0x8c/0x130 [ 33.850097][ T471] dev_forward_change+0x3b3/0x850 [ 33.850099][ T471] ? addrconf_fixup_forwarding+0x4d/0x4d0 [ 33.850101][ T471] ? addrconf_sysctl_proxy_ndp+0x2f0/0x2f0 [ 33.850104][ T471] addrconf_fixup_forwarding+0x2af/0x4d0 [ 33.850106][ T471] addrconf_sysctl_forward+0x209/0x2b0 [ 33.850108][ T471] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 33.850111][ T471] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 33.850113][ T471] ? __kvmalloc_node_noprof+0x305/0x8a0 [ 33.850115][ T471] ? proc_sys_call_handler+0x25d/0x480 [ 33.850118][ T471] proc_sys_call_handler+0x31b/0x480 [ 33.850120][ T471] ? proc_sys_lookup+0x3d0/0x3d0 [ 33.850122][ T471] ? rcu_read_unlock+0x1b/0x70 [ 33.850124][ T471] ? do_raw_spin_unlock+0x59/0x250 [ 33.850126][ T471] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 33.850128][ T471] ? rcu_read_lock_any_held+0x3c/0x90 [ 33.850130][ T471] ? proc_sys_call_handler+0x480/0x480 [ 33.850132][ T471] new_sync_write+0x333/0x750 [ 33.850133][ T471] ? __lock_acquire+0x508/0xc10 [ 33.850135][ T471] ? new_sync_read+0x740/0x740 [ 33.850136][ T471] ? lock_acquire.part.0+0xbc/0x260 [ 33.850138][ T471] ? ksys_write+0x116/0x250 [ 33.850140][ T471] vfs_write+0x6a4/0xc10 [ 33.850142][ T471] ksys_write+0x116/0x250 [ 33.850143][ T471] ? __ia32_sys_read+0xc0/0xc0 [ 33.850145][ T471] ? rcu_is_watching+0x15/0xd0 [ 33.850146][ T471] ? rcu_is_watching+0x15/0xd0 [ 33.850148][ T471] do_syscall_64+0x117/0x590 [ 33.850149][ T471] ? trace_hardirqs_off+0xd/0x30 [ 33.850152][ T471] ? exc_page_fault+0xee/0x100 [ 33.850154][ T471] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 33.850156][ T471] RIP: 0033:0x7ff8311b608e [ 33.850159][ T471] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 33.850161][ T471] RSP: 002b:00007ffecab8d0c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 33.850164][ T471] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007ff8311b608e [ 33.850165][ T471] RDX: 0000000000000002 RSI: 000055b1ecde34b0 RDI: 0000000000000005 [ 33.850166][ T471] RBP: 00007ffecab8d0d0 R08: 0000000000000000 R09: 0000000000000000 [ 33.850167][ T471] R10: 0000000000000000 R11: 0000000000000202 R12: 000055b1ecde55e0 [ 33.850168][ T471] R13: 000055b1ecde3470 R14: 0000000000000002 R15: 0000000000000000 [ 33.850170][ T471]