[ 8.650855][ T191] ip (191) used greatest stack depth: 24128 bytes left [ 9.237547][ T213] 8021q: 802.1Q VLAN Support v1.8 [ 9.906667][ T241] br1: port 1(veth1) entered blocking state [ 9.906936][ T241] br1: port 1(veth1) entered disabled state [ 9.907113][ T241] veth1: entered allmulticast mode [ 9.908558][ T241] veth1: entered promiscuous mode [ 9.929618][ T39] br1: port 1(veth1) entered blocking state [ 9.929852][ T39] br1: port 1(veth1) entered forwarding state [ 24.017450][ T376] [ 24.017539][ T376] ======================================================== [ 24.017663][ T376] WARNING: possible irq lock inversion dependency detected [ 24.017779][ T376] 7.1.0-rc5-virtme #1 Not tainted [ 24.017861][ T376] -------------------------------------------------------- [ 24.017975][ T376] sysctl/376 just changed the state of lock: [ 24.018070][ T376] ffffffffb517e8b8 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.018215][ T376] but this lock was taken by another, SOFTIRQ-READ-safe lock in the past: [ 24.018330][ T376] (&ndev->lock){++.-}-{3:3} [ 24.018332][ T376] [ 24.018332][ T376] [ 24.018332][ T376] and interrupts could create inverse lock ordering between them. [ 24.018332][ T376] [ 24.018609][ T376] [ 24.018609][ T376] other info that might help us debug this: [ 24.018723][ T376] Possible interrupt unsafe locking scenario: [ 24.018723][ T376] [ 24.018852][ T376] CPU0 CPU1 [ 24.018930][ T376] ---- ---- [ 24.019007][ T376] lock(acaddr_hash_lock); [ 24.019086][ T376] local_irq_disable(); [ 24.019180][ T376] lock(&ndev->lock); [ 24.019276][ T376] lock(acaddr_hash_lock); [ 24.019373][ T376] [ 24.019433][ T376] lock(&ndev->lock); [ 24.019494][ T376] [ 24.019494][ T376] *** DEADLOCK *** [ 24.019494][ T376] [ 24.019607][ T376] 2 locks held by sysctl/376: [ 24.019685][ T376] #0: ff1100000a0543e0 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x116/0x250 [ 24.019829][ T376] #1: ffffffffb508c9c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_fixup_forwarding+0x4d/0x4d0 [ 24.019982][ T376] [ 24.019982][ T376] the shortest dependencies between 2nd lock and 1st lock: [ 24.020119][ T376] -> (&ndev->lock){++.-}-{3:3} { [ 24.020201][ T376] HARDIRQ-ON-W at: [ 24.020262][ T376] __lock_acquire+0x378/0xc10 [ 24.020364][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.020469][ T376] _raw_write_lock_bh+0x38/0x50 [ 24.020576][ T376] addrconf_permanent_addr+0x108/0x9c0 [ 24.020694][ T376] addrconf_notify+0x151/0xf30 [ 24.020801][ T376] notifier_call_chain+0xb0/0x320 [ 24.020900][ T376] __dev_notify_flags+0xde/0x280 [ 24.020999][ T376] netif_change_flags+0xfe/0x190 [ 24.021100][ T376] do_setlink.isra.0+0x1cc3/0x2750 [ 24.021201][ T376] rtnl_newlink+0x8d1/0xef0 [ 24.021301][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 24.021401][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 24.021503][ T376] netlink_unicast+0x486/0x750 [ 24.021602][ T376] netlink_sendmsg+0x735/0xc60 [ 24.021697][ T376] ____sys_sendmsg+0x419/0x850 [ 24.021800][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 24.021900][ T376] __sys_sendmsg+0x145/0x1f0 [ 24.021996][ T376] do_syscall_64+0x117/0x590 [ 24.022095][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.022211][ T376] HARDIRQ-ON-R at: [ 24.022271][ T376] __lock_acquire+0x378/0xc10 [ 24.022367][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.022466][ T376] _raw_read_lock_bh+0x44/0x80 [ 24.022561][ T376] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 24.022677][ T376] inet6_fill_link_af+0x5c/0xe0 [ 24.022773][ T376] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 24.022890][ T376] rtnl_getlink+0x9c9/0xeb0 [ 24.022985][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 24.023082][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 24.023179][ T376] netlink_unicast+0x486/0x750 [ 24.023278][ T376] netlink_sendmsg+0x735/0xc60 [ 24.023375][ T376] ____sys_sendmsg+0x419/0x850 [ 24.023472][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 24.023568][ T376] __sys_sendmsg+0x145/0x1f0 [ 24.023661][ T376] do_syscall_64+0x117/0x590 [ 24.023756][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.023878][ T376] IN-SOFTIRQ-R at: [ 24.023936][ T376] __lock_acquire+0x378/0xc10 [ 24.024035][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.024131][ T376] _raw_read_lock_bh+0x44/0x80 [ 24.024226][ T376] ipv6_get_lladdr+0xa8/0x3f0 [ 24.024323][ T376] ndisc_send_ns+0xf3/0x120 [ 24.024419][ T376] ndisc_solicit+0x314/0x480 [ 24.024516][ T376] neigh_probe+0xb3/0x100 [ 24.024611][ T376] __neigh_event_send+0x802/0x1070 [ 24.024708][ T376] neigh_resolve_output+0xbe/0x140 [ 24.024809][ T376] ip6_finish_output2+0x423/0x1300 [ 24.024903][ T376] ip6_finish_output+0x646/0xda0 [ 24.025001][ T376] ip6_output+0x23f/0x7f0 [ 24.025097][ T376] ip6_forward+0x10f4/0x2bd0 [ 24.025192][ T376] ipv6_rcv+0x3c1/0x5a0 [ 24.025331][ T376] __netif_receive_skb_one_core+0xfc/0x180 [ 24.025445][ T376] netif_receive_skb_internal+0xb0/0x330 [ 24.025559][ T376] netif_receive_skb+0x56/0x380 [ 24.025698][ T376] br_handle_frame_finish+0xc3b/0x1fb0 [bridge] [ 24.025830][ T376] br_handle_frame+0x739/0xf40 [bridge] [ 24.025951][ T376] __netif_receive_skb_core.constprop.0+0x536/0x2bc0 [ 24.026107][ T376] __netif_receive_skb_one_core+0xa2/0x180 [ 24.026219][ T376] process_backlog+0x2bc/0x1490 [ 24.026319][ T376] __napi_poll+0xa7/0x3b0 [ 24.026455][ T376] net_rx_action+0x513/0xf50 [ 24.026551][ T376] handle_softirqs+0x1d8/0x940 [ 24.026647][ T376] do_softirq+0xa9/0xe0 [ 24.026787][ T376] __local_bh_enable_ip+0x113/0x140 [ 24.026885][ T376] __neigh_event_send+0x30a/0x1070 [ 24.026979][ T376] neigh_resolve_output+0xbe/0x140 [ 24.027116][ T376] ip6_finish_output2+0x423/0x1300 [ 24.027212][ T376] ip6_finish_output+0x646/0xda0 [ 24.027307][ T376] ip6_output+0x23f/0x7f0 [ 24.027446][ T376] ip6_send_skb+0xee/0x350 [ 24.027543][ T376] rawv6_push_pending_frames+0x4cb/0xa90 [ 24.027659][ T376] rawv6_sendmsg+0x1434/0x1a50 [ 24.027806][ T376] __sys_sendto+0x2c9/0x400 [ 24.027903][ T376] __x64_sys_sendto+0xe4/0x1f0 [ 24.027997][ T376] do_syscall_64+0x117/0x590 [ 24.028136][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.028251][ T376] INITIAL USE at: [ 24.028308][ T376] __lock_acquire+0x378/0xc10 [ 24.028403][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.028539][ T376] _raw_write_lock_bh+0x38/0x50 [ 24.028635][ T376] addrconf_permanent_addr+0x108/0x9c0 [ 24.028751][ T376] addrconf_notify+0x151/0xf30 [ 24.028894][ T376] notifier_call_chain+0xb0/0x320 [ 24.028989][ T376] __dev_notify_flags+0xde/0x280 [ 24.029083][ T376] netif_change_flags+0xfe/0x190 [ 24.029219][ T376] do_setlink.isra.0+0x1cc3/0x2750 [ 24.029317][ T376] rtnl_newlink+0x8d1/0xef0 [ 24.029413][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 24.029510][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 24.029607][ T376] netlink_unicast+0x486/0x750 [ 24.029702][ T376] netlink_sendmsg+0x735/0xc60 [ 24.029846][ T376] ____sys_sendmsg+0x419/0x850 [ 24.029942][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 24.030039][ T376] __sys_sendmsg+0x145/0x1f0 [ 24.030133][ T376] do_syscall_64+0x117/0x590 [ 24.030268][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.030384][ T376] INITIAL READ USE at: [ 24.030459][ T376] __lock_acquire+0x378/0xc10 [ 24.030555][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.030670][ T376] _raw_read_lock_bh+0x44/0x80 [ 24.030766][ T376] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 24.030926][ T376] inet6_fill_link_af+0x5c/0xe0 [ 24.031023][ T376] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 24.031137][ T376] rtnl_getlink+0x9c9/0xeb0 [ 24.031273][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 24.031368][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 24.031463][ T376] netlink_unicast+0x486/0x750 [ 24.031561][ T376] netlink_sendmsg+0x735/0xc60 [ 24.031657][ T376] ____sys_sendmsg+0x419/0x850 [ 24.031753][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 24.031895][ T376] __sys_sendmsg+0x145/0x1f0 [ 24.031988][ T376] do_syscall_64+0x117/0x590 [ 24.032084][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.032237][ T376] } [ 24.032278][ T376] ... key at: [] __key.37+0x0/0x40 [ 24.032396][ T376] ... acquired at: [ 24.032454][ T376] __lock_acquire+0x508/0xc10 [ 24.032571][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.032650][ T376] _raw_spin_lock+0x33/0x40 [ 24.032725][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 24.032827][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 24.032943][ T376] addrconf_join_anycast+0x1bc/0x260 [ 24.033020][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 24.033096][ T376] addrconf_dad_completed+0x14b/0xe10 [ 24.033172][ T376] addrconf_dad_work+0x3c1/0x930 [ 24.033289][ T376] process_one_work+0xdf8/0x1410 [ 24.033366][ T376] worker_thread+0x4f1/0xd60 [ 24.033443][ T376] kthread+0x367/0x460 [ 24.033500][ T376] ret_from_fork+0x474/0x6b0 [ 24.033618][ T376] ret_from_fork_asm+0x11/0x20 [ 24.033695][ T376] [ 24.033733][ T376] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 24.033818][ T376] HARDIRQ-ON-W at: [ 24.033875][ T376] __lock_acquire+0x378/0xc10 [ 24.034011][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.034106][ T376] _raw_spin_lock+0x33/0x40 [ 24.034200][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 24.034356][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 24.034455][ T376] addrconf_join_anycast+0x1bc/0x260 [ 24.034551][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 24.034689][ T376] addrconf_dad_completed+0x14b/0xe10 [ 24.034788][ T376] addrconf_dad_work+0x3c1/0x930 [ 24.034886][ T376] process_one_work+0xdf8/0x1410 [ 24.035022][ T376] worker_thread+0x4f1/0xd60 [ 24.035120][ T376] kthread+0x367/0x460 [ 24.035197][ T376] ret_from_fork+0x474/0x6b0 [ 24.035292][ T376] ret_from_fork_asm+0x11/0x20 [ 24.035431][ T376] SOFTIRQ-ON-W at: [ 24.035490][ T376] __lock_acquire+0x378/0xc10 [ 24.035591][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.035737][ T376] _raw_spin_lock+0x33/0x40 [ 24.035839][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.035936][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 24.036071][ T376] dev_forward_change+0x3b3/0x850 [ 24.036166][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 24.036281][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 24.036417][ T376] proc_sys_call_handler+0x31b/0x480 [ 24.036515][ T376] new_sync_write+0x333/0x750 [ 24.036610][ T376] vfs_write+0x6a4/0xc10 [ 24.036704][ T376] ksys_write+0x116/0x250 [ 24.036849][ T376] do_syscall_64+0x117/0x590 [ 24.036944][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.037058][ T376] INITIAL USE at: [ 24.037155][ T376] __lock_acquire+0x378/0xc10 [ 24.037249][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.037343][ T376] _raw_spin_lock+0x33/0x40 [ 24.037479][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 24.037593][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 24.037685][ T376] addrconf_join_anycast+0x1bc/0x260 [ 24.037825][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 24.037917][ T376] addrconf_dad_completed+0x14b/0xe10 [ 24.038013][ T376] addrconf_dad_work+0x3c1/0x930 [ 24.038146][ T376] process_one_work+0xdf8/0x1410 [ 24.038243][ T376] worker_thread+0x4f1/0xd60 [ 24.038338][ T376] kthread+0x367/0x460 [ 24.038414][ T376] ret_from_fork+0x474/0x6b0 [ 24.038550][ T376] ret_from_fork_asm+0x11/0x20 [ 24.038647][ T376] } [ 24.038685][ T376] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 24.038844][ T376] ... acquired at: [ 24.038900][ T376] mark_lock+0x1d7/0xa00 [ 24.038976][ T376] mark_usage+0x105/0x170 [ 24.039052][ T376] __lock_acquire+0x378/0xc10 [ 24.039127][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.039245][ T376] _raw_spin_lock+0x33/0x40 [ 24.039321][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.039397][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 24.039473][ T376] dev_forward_change+0x3b3/0x850 [ 24.039549][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 24.039643][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 24.039718][ T376] proc_sys_call_handler+0x31b/0x480 [ 24.039841][ T376] new_sync_write+0x333/0x750 [ 24.039915][ T376] vfs_write+0x6a4/0xc10 [ 24.039990][ T376] ksys_write+0x116/0x250 [ 24.040066][ T376] do_syscall_64+0x117/0x590 [ 24.040182][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.040278][ T376] [ 24.040316][ T376] [ 24.040316][ T376] stack backtrace: [ 24.040410][ T376] CPU: 2 UID: 0 PID: 376 Comm: sysctl Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 24.040413][ T376] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.040415][ T376] Call Trace: [ 24.040417][ T376] [ 24.040418][ T376] dump_stack_lvl+0x6f/0xa0 [ 24.040422][ T376] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 24.040425][ T376] mark_lock_irq+0x989/0x9c0 [ 24.040428][ T376] mark_lock+0x1d7/0xa00 [ 24.040429][ T376] mark_usage+0x105/0x170 [ 24.040431][ T376] __lock_acquire+0x378/0xc10 [ 24.040433][ T376] lock_acquire.part.0+0xbc/0x260 [ 24.040434][ T376] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.040436][ T376] ? rcu_is_watching+0x15/0xd0 [ 24.040439][ T376] ? do_raw_read_unlock+0x70/0x70 [ 24.040440][ T376] ? lock_acquire+0x134/0x160 [ 24.040442][ T376] _raw_spin_lock+0x33/0x40 [ 24.040443][ T376] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.040445][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 24.040447][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 24.040448][ T376] ? find_held_lock+0x2b/0x80 [ 24.040451][ T376] ? __ipv6_isatap_ifid+0x210/0x210 [ 24.040452][ T376] ? mark_held_locks+0x40/0x70 [ 24.040454][ T376] ? lockdep_hardirqs_on+0x8c/0x130 [ 24.040456][ T376] dev_forward_change+0x3b3/0x850 [ 24.040458][ T376] ? addrconf_fixup_forwarding+0x4d/0x4d0 [ 24.040460][ T376] ? addrconf_sysctl_proxy_ndp+0x2f0/0x2f0 [ 24.040463][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 24.040465][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 24.040467][ T376] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 24.040470][ T376] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 24.040471][ T376] ? __kvmalloc_node_noprof+0x305/0x8a0 [ 24.040475][ T376] ? proc_sys_call_handler+0x25d/0x480 [ 24.040477][ T376] proc_sys_call_handler+0x31b/0x480 [ 24.040479][ T376] ? proc_sys_lookup+0x3d0/0x3d0 [ 24.040481][ T376] ? rcu_read_unlock+0x1b/0x70 [ 24.040484][ T376] ? do_raw_spin_unlock+0x59/0x250 [ 24.040485][ T376] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 24.040487][ T376] ? rcu_read_lock_any_held+0x3c/0x90 [ 24.040489][ T376] ? proc_sys_call_handler+0x480/0x480 [ 24.040491][ T376] new_sync_write+0x333/0x750 [ 24.040492][ T376] ? __lock_acquire+0x508/0xc10 [ 24.040494][ T376] ? new_sync_read+0x740/0x740 [ 24.040496][ T376] ? lock_acquire.part.0+0xbc/0x260 [ 24.040497][ T376] ? ksys_write+0x116/0x250 [ 24.040499][ T376] vfs_write+0x6a4/0xc10 [ 24.040501][ T376] ksys_write+0x116/0x250 [ 24.040502][ T376] ? __ia32_sys_read+0xc0/0xc0 [ 24.040504][ T376] ? rcu_is_watching+0x15/0xd0 [ 24.040505][ T376] ? rcu_is_watching+0x15/0xd0 [ 24.040507][ T376] do_syscall_64+0x117/0x590 [ 24.040508][ T376] ? trace_hardirqs_off+0xd/0x30 [ 24.040511][ T376] ? exc_page_fault+0xee/0x100 [ 24.040513][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 24.040515][ T376] RIP: 0033:0x7f6f53f9108e [ 24.040517][ T376] 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 [ 24.040519][ T376] RSP: 002b:00007fff87ffe560 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 24.040522][ T376] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f6f53f9108e [ 24.040523][ T376] RDX: 0000000000000002 RSI: 000055d3dae1b4b0 RDI: 0000000000000005 [ 24.040524][ T376] RBP: 00007fff87ffe570 R08: 0000000000000000 R09: 0000000000000000 [ 24.040525][ T376] R10: 0000000000000000 R11: 0000000000000202 R12: 000055d3dae1d5e0 [ 24.040526][ T376] R13: 000055d3dae1b470 R14: 0000000000000002 R15: 0000000000000000 [ 24.040528][ T376] [ 24.180365][ T386] br1: port 1(veth1) entered disabled state [ 24.198326][ T387] veth1: left allmulticast mode [ 24.198443][ T387] veth1: left promiscuous mode [ 24.198595][ T387] br1: port 1(veth1) entered disabled state