[ 9.184080][ T215] 8021q: 802.1Q VLAN Support v1.8 [ 9.808446][ T242] br1: port 1(veth1) entered blocking state [ 9.808780][ T242] br1: port 1(veth1) entered disabled state [ 9.809464][ T242] veth1: entered allmulticast mode [ 9.811222][ T242] veth1: entered promiscuous mode [ 9.841639][ T38] br1: port 1(veth1) entered blocking state [ 9.841884][ T38] br1: port 1(veth1) entered forwarding state [ 23.944077][ T376] [ 23.944169][ T376] ======================================================== [ 23.944300][ T376] WARNING: possible irq lock inversion dependency detected [ 23.944415][ T376] 7.1.0-rc5-virtme #1 Not tainted [ 23.944495][ T376] -------------------------------------------------------- [ 23.944612][ T376] sysctl/376 just changed the state of lock: [ 23.944707][ T376] ffffffff9fd7e8b8 (acaddr_hash_lock){+.+.}-{3:3}, at: __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.944862][ T376] but this lock was taken by another, SOFTIRQ-READ-safe lock in the past: [ 23.944980][ T376] (&ndev->lock){++.-}-{3:3} [ 23.944982][ T376] [ 23.944982][ T376] [ 23.944982][ T376] and interrupts could create inverse lock ordering between them. [ 23.944982][ T376] [ 23.945274][ T376] [ 23.945274][ T376] other info that might help us debug this: [ 23.945390][ T376] Possible interrupt unsafe locking scenario: [ 23.945390][ T376] [ 23.945513][ T376] CPU0 CPU1 [ 23.945592][ T376] ---- ---- [ 23.945678][ T376] lock(acaddr_hash_lock); [ 23.945773][ T376] local_irq_disable(); [ 23.945881][ T376] lock(&ndev->lock); [ 23.945989][ T376] lock(acaddr_hash_lock); [ 23.946095][ T376] [ 23.946163][ T376] lock(&ndev->lock); [ 23.946229][ T376] [ 23.946229][ T376] *** DEADLOCK *** [ 23.946229][ T376] [ 23.946350][ T376] 2 locks held by sysctl/376: [ 23.946429][ T376] #0: ff11000009b1c3e0 (sb_writers#3){.+.+}-{0:0}, at: ksys_write+0x116/0x250 [ 23.946573][ T376] #1: ffffffff9fc8c9c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_fixup_forwarding+0x4d/0x4d0 [ 23.946750][ T376] [ 23.946750][ T376] the shortest dependencies between 2nd lock and 1st lock: [ 23.946890][ T376] -> (&ndev->lock){++.-}-{3:3} { [ 23.946972][ T376] HARDIRQ-ON-W at: [ 23.947037][ T376] __lock_acquire+0x378/0xc10 [ 23.947142][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.947243][ T376] _raw_write_lock_bh+0x38/0x50 [ 23.947342][ T376] addrconf_permanent_addr+0x108/0x9c0 [ 23.947458][ T376] addrconf_notify+0x151/0xf30 [ 23.947558][ T376] notifier_call_chain+0xb0/0x320 [ 23.947662][ T376] __dev_notify_flags+0xde/0x280 [ 23.947772][ T376] netif_change_flags+0xfe/0x190 [ 23.947879][ T376] do_setlink.isra.0+0x1cc3/0x2750 [ 23.947979][ T376] rtnl_newlink+0x8d1/0xef0 [ 23.948083][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 23.948179][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 23.948277][ T376] netlink_unicast+0x486/0x750 [ 23.948373][ T376] netlink_sendmsg+0x735/0xc60 [ 23.948471][ T376] ____sys_sendmsg+0x419/0x850 [ 23.948569][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 23.948666][ T376] __sys_sendmsg+0x145/0x1f0 [ 23.948772][ T376] do_syscall_64+0x117/0x590 [ 23.948872][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.948995][ T376] HARDIRQ-ON-R at: [ 23.949053][ T376] __lock_acquire+0x378/0xc10 [ 23.949149][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.949247][ T376] _raw_read_lock_bh+0x44/0x80 [ 23.949354][ T376] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 23.949471][ T376] inet6_fill_link_af+0x5c/0xe0 [ 23.949569][ T376] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 23.949684][ T376] rtnl_getlink+0x9c9/0xeb0 [ 23.949786][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 23.949883][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 23.949984][ T376] netlink_unicast+0x486/0x750 [ 23.950083][ T376] netlink_sendmsg+0x735/0xc60 [ 23.950181][ T376] ____sys_sendmsg+0x419/0x850 [ 23.950284][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 23.950381][ T376] __sys_sendmsg+0x145/0x1f0 [ 23.950487][ T376] do_syscall_64+0x117/0x590 [ 23.950584][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.950704][ T376] IN-SOFTIRQ-R at: [ 23.950767][ T376] __lock_acquire+0x378/0xc10 [ 23.950864][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.950961][ T376] _raw_read_lock_bh+0x44/0x80 [ 23.951058][ T376] ipv6_get_lladdr+0xa8/0x3f0 [ 23.951157][ T376] ndisc_send_ns+0xf3/0x120 [ 23.951255][ T376] ndisc_solicit+0x314/0x480 [ 23.951353][ T376] neigh_probe+0xb3/0x100 [ 23.951456][ T376] __neigh_event_send+0x802/0x1070 [ 23.951555][ T376] neigh_resolve_output+0xbe/0x140 [ 23.951653][ T376] ip6_finish_output2+0x423/0x1300 [ 23.951756][ T376] ip6_finish_output+0x646/0xda0 [ 23.951860][ T376] ip6_output+0x23f/0x7f0 [ 23.951963][ T376] ip6_forward+0x10f4/0x2bd0 [ 23.952062][ T376] ipv6_rcv+0x3c1/0x5a0 [ 23.952159][ T376] __netif_receive_skb_one_core+0xfc/0x180 [ 23.952282][ T376] netif_receive_skb_internal+0xb0/0x330 [ 23.952399][ T376] netif_receive_skb+0x56/0x380 [ 23.952495][ T376] br_handle_frame_finish+0xc3b/0x1fb0 [bridge] [ 23.952628][ T376] br_handle_frame+0x739/0xf40 [bridge] [ 23.952754][ T376] __netif_receive_skb_core.constprop.0+0x536/0x2bc0 [ 23.952879][ T376] __netif_receive_skb_one_core+0xa2/0x180 [ 23.952997][ T376] process_backlog+0x2bc/0x1490 [ 23.953094][ T376] __napi_poll+0xa7/0x3b0 [ 23.953192][ T376] net_rx_action+0x513/0xf50 [ 23.953298][ T376] handle_softirqs+0x1d8/0x940 [ 23.953403][ T376] do_softirq+0xa9/0xe0 [ 23.953501][ T376] __local_bh_enable_ip+0x113/0x140 [ 23.953604][ T376] __neigh_event_send+0x30a/0x1070 [ 23.953707][ T376] neigh_resolve_output+0xbe/0x140 [ 23.953814][ T376] ip6_finish_output2+0x423/0x1300 [ 23.953924][ T376] ip6_finish_output+0x646/0xda0 [ 23.954027][ T376] ip6_output+0x23f/0x7f0 [ 23.954124][ T376] ip6_send_skb+0xee/0x350 [ 23.954222][ T376] rawv6_push_pending_frames+0x4cb/0xa90 [ 23.954349][ T376] rawv6_sendmsg+0x1434/0x1a50 [ 23.954446][ T376] __sys_sendto+0x2c9/0x400 [ 23.954550][ T376] __x64_sys_sendto+0xe4/0x1f0 [ 23.954647][ T376] do_syscall_64+0x117/0x590 [ 23.954750][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.954867][ T376] INITIAL USE at: [ 23.954926][ T376] __lock_acquire+0x378/0xc10 [ 23.955023][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.955122][ T376] _raw_write_lock_bh+0x38/0x50 [ 23.955219][ T376] addrconf_permanent_addr+0x108/0x9c0 [ 23.955340][ T376] addrconf_notify+0x151/0xf30 [ 23.955441][ T376] notifier_call_chain+0xb0/0x320 [ 23.955544][ T376] __dev_notify_flags+0xde/0x280 [ 23.955642][ T376] netif_change_flags+0xfe/0x190 [ 23.955742][ T376] do_setlink.isra.0+0x1cc3/0x2750 [ 23.955840][ T376] rtnl_newlink+0x8d1/0xef0 [ 23.955937][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 23.956038][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 23.956137][ T376] netlink_unicast+0x486/0x750 [ 23.956234][ T376] netlink_sendmsg+0x735/0xc60 [ 23.956341][ T376] ____sys_sendmsg+0x419/0x850 [ 23.956447][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 23.956558][ T376] __sys_sendmsg+0x145/0x1f0 [ 23.956665][ T376] do_syscall_64+0x117/0x590 [ 23.956774][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.956906][ T376] INITIAL READ USE at: [ 23.956990][ T376] __lock_acquire+0x378/0xc10 [ 23.957093][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.957222][ T376] _raw_read_lock_bh+0x44/0x80 [ 23.957329][ T376] inet6_fill_ifla6_attrs+0x1aee/0x21e0 [ 23.957445][ T376] inet6_fill_link_af+0x5c/0xe0 [ 23.957542][ T376] rtnl_fill_ifinfo.isra.0+0x1a45/0x2c20 [ 23.957658][ T376] rtnl_getlink+0x9c9/0xeb0 [ 23.957760][ T376] rtnetlink_rcv_msg+0x6fd/0xbd0 [ 23.957860][ T376] netlink_rcv_skb+0x14e/0x3a0 [ 23.957957][ T376] netlink_unicast+0x486/0x750 [ 23.958060][ T376] netlink_sendmsg+0x735/0xc60 [ 23.958158][ T376] ____sys_sendmsg+0x419/0x850 [ 23.958262][ T376] ___sys_sendmsg+0x14e/0x1d0 [ 23.958360][ T376] __sys_sendmsg+0x145/0x1f0 [ 23.958457][ T376] do_syscall_64+0x117/0x590 [ 23.958554][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.958671][ T376] } [ 23.958712][ T376] ... key at: [] __key.37+0x0/0x40 [ 23.958839][ T376] ... acquired at: [ 23.958898][ T376] __lock_acquire+0x508/0xc10 [ 23.958978][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.959056][ T376] _raw_spin_lock+0x33/0x40 [ 23.959133][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 23.959229][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 23.959308][ T376] addrconf_join_anycast+0x1bc/0x260 [ 23.959389][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 23.959465][ T376] addrconf_dad_completed+0x14b/0xe10 [ 23.959543][ T376] addrconf_dad_work+0x3c1/0x930 [ 23.959621][ T376] process_one_work+0xdf8/0x1410 [ 23.959700][ T376] worker_thread+0x4f1/0xd60 [ 23.959783][ T376] kthread+0x367/0x460 [ 23.959843][ T376] ret_from_fork+0x474/0x6b0 [ 23.959928][ T376] ret_from_fork_asm+0x11/0x20 [ 23.960008][ T376] [ 23.960049][ T376] -> (acaddr_hash_lock){+.+.}-{3:3} { [ 23.960128][ T376] HARDIRQ-ON-W at: [ 23.960196][ T376] __lock_acquire+0x378/0xc10 [ 23.960298][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.960395][ T376] _raw_spin_lock+0x33/0x40 [ 23.960500][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 23.960618][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 23.960715][ T376] addrconf_join_anycast+0x1bc/0x260 [ 23.960817][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 23.960915][ T376] addrconf_dad_completed+0x14b/0xe10 [ 23.961013][ T376] addrconf_dad_work+0x3c1/0x930 [ 23.961115][ T376] process_one_work+0xdf8/0x1410 [ 23.961217][ T376] worker_thread+0x4f1/0xd60 [ 23.961317][ T376] kthread+0x367/0x460 [ 23.961396][ T376] ret_from_fork+0x474/0x6b0 [ 23.961493][ T376] ret_from_fork_asm+0x11/0x20 [ 23.961596][ T376] SOFTIRQ-ON-W at: [ 23.961654][ T376] __lock_acquire+0x378/0xc10 [ 23.961756][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.961858][ T376] _raw_spin_lock+0x33/0x40 [ 23.961960][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.962057][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 23.962160][ T376] dev_forward_change+0x3b3/0x850 [ 23.962263][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 23.962380][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 23.962476][ T376] proc_sys_call_handler+0x31b/0x480 [ 23.962580][ T376] new_sync_write+0x333/0x750 [ 23.962679][ T376] vfs_write+0x6a4/0xc10 [ 23.962781][ T376] ksys_write+0x116/0x250 [ 23.962882][ T376] do_syscall_64+0x117/0x590 [ 23.962981][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.963098][ T376] INITIAL USE at: [ 23.963160][ T376] __lock_acquire+0x378/0xc10 [ 23.963261][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.963361][ T376] _raw_spin_lock+0x33/0x40 [ 23.963458][ T376] ipv6_add_acaddr_hash.isra.0+0x16d/0x350 [ 23.963573][ T376] __ipv6_dev_ac_inc+0x57e/0x930 [ 23.963671][ T376] addrconf_join_anycast+0x1bc/0x260 [ 23.963775][ T376] __ipv6_ifa_notify+0x75b/0xad0 [ 23.963874][ T376] addrconf_dad_completed+0x14b/0xe10 [ 23.963977][ T376] addrconf_dad_work+0x3c1/0x930 [ 23.964079][ T376] process_one_work+0xdf8/0x1410 [ 23.964221][ T376] worker_thread+0x4f1/0xd60 [ 23.964318][ T376] kthread+0x367/0x460 [ 23.964398][ T376] ret_from_fork+0x474/0x6b0 [ 23.964540][ T376] ret_from_fork_asm+0x11/0x20 [ 23.964638][ T376] } [ 23.964677][ T376] ... key at: [] acaddr_hash_lock+0x18/0x45a0 [ 23.964798][ T376] ... acquired at: [ 23.964894][ T376] mark_lock+0x1d7/0xa00 [ 23.964973][ T376] mark_usage+0x105/0x170 [ 23.965050][ T376] __lock_acquire+0x378/0xc10 [ 23.965128][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.965251][ T376] _raw_spin_lock+0x33/0x40 [ 23.965329][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.965405][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 23.965482][ T376] dev_forward_change+0x3b3/0x850 [ 23.965602][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 23.965698][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 23.965779][ T376] proc_sys_call_handler+0x31b/0x480 [ 23.965858][ T376] new_sync_write+0x333/0x750 [ 23.965974][ T376] vfs_write+0x6a4/0xc10 [ 23.966059][ T376] ksys_write+0x116/0x250 [ 23.966137][ T376] do_syscall_64+0x117/0x590 [ 23.966214][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.966316][ T376] [ 23.966354][ T376] [ 23.966354][ T376] stack backtrace: [ 23.966459][ T376] CPU: 1 UID: 0 PID: 376 Comm: sysctl Not tainted 7.1.0-rc5-virtme #1 PREEMPT(full) [ 23.966462][ T376] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.966464][ T376] Call Trace: [ 23.966466][ T376] [ 23.966467][ T376] dump_stack_lvl+0x6f/0xa0 [ 23.966471][ T376] print_irq_inversion_bug.part.0.cold+0xe6/0x143 [ 23.966475][ T376] mark_lock_irq+0x989/0x9c0 [ 23.966477][ T376] mark_lock+0x1d7/0xa00 [ 23.966479][ T376] mark_usage+0x105/0x170 [ 23.966480][ T376] __lock_acquire+0x378/0xc10 [ 23.966482][ T376] lock_acquire.part.0+0xbc/0x260 [ 23.966484][ T376] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.966485][ T376] ? rcu_is_watching+0x15/0xd0 [ 23.966488][ T376] ? do_raw_read_unlock+0x70/0x70 [ 23.966490][ T376] ? lock_acquire+0x134/0x160 [ 23.966492][ T376] _raw_spin_lock+0x33/0x40 [ 23.966494][ T376] ? __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.966495][ T376] __ipv6_dev_ac_dec+0x236/0x5d0 [ 23.966497][ T376] addrconf_leave_anycast+0x1bc/0x260 [ 23.966498][ T376] ? find_held_lock+0x2b/0x80 [ 23.966501][ T376] ? __ipv6_isatap_ifid+0x210/0x210 [ 23.966503][ T376] ? mark_held_locks+0x40/0x70 [ 23.966504][ T376] ? lockdep_hardirqs_on+0x8c/0x130 [ 23.966507][ T376] dev_forward_change+0x3b3/0x850 [ 23.966509][ T376] ? addrconf_fixup_forwarding+0x4d/0x4d0 [ 23.966511][ T376] ? addrconf_sysctl_proxy_ndp+0x2f0/0x2f0 [ 23.966514][ T376] addrconf_fixup_forwarding+0x2af/0x4d0 [ 23.966516][ T376] addrconf_sysctl_forward+0x209/0x2b0 [ 23.966518][ T376] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 23.966520][ T376] ? addrconf_fixup_forwarding+0x4d0/0x4d0 [ 23.966522][ T376] ? __kvmalloc_node_noprof+0x305/0x8a0 [ 23.966525][ T376] ? proc_sys_call_handler+0x25d/0x480 [ 23.966527][ T376] proc_sys_call_handler+0x31b/0x480 [ 23.966529][ T376] ? proc_sys_lookup+0x3d0/0x3d0 [ 23.966531][ T376] ? rcu_read_unlock+0x1b/0x70 [ 23.966534][ T376] ? do_raw_spin_unlock+0x59/0x250 [ 23.966535][ T376] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 23.966537][ T376] ? rcu_read_lock_any_held+0x3c/0x90 [ 23.966539][ T376] ? proc_sys_call_handler+0x480/0x480 [ 23.966541][ T376] new_sync_write+0x333/0x750 [ 23.966542][ T376] ? __lock_acquire+0x508/0xc10 [ 23.966544][ T376] ? new_sync_read+0x740/0x740 [ 23.966545][ T376] ? lock_acquire.part.0+0xbc/0x260 [ 23.966547][ T376] ? ksys_write+0x116/0x250 [ 23.966549][ T376] vfs_write+0x6a4/0xc10 [ 23.966551][ T376] ksys_write+0x116/0x250 [ 23.966552][ T376] ? __ia32_sys_read+0xc0/0xc0 [ 23.966553][ T376] ? rcu_is_watching+0x15/0xd0 [ 23.966555][ T376] ? rcu_is_watching+0x15/0xd0 [ 23.966557][ T376] do_syscall_64+0x117/0x590 [ 23.966558][ T376] ? trace_hardirqs_off+0xd/0x30 [ 23.966561][ T376] ? exc_page_fault+0xee/0x100 [ 23.966563][ T376] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 23.966564][ T376] RIP: 0033:0x7fd2c481c08e [ 23.966567][ 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 [ 23.966568][ T376] RSP: 002b:00007ffd36187e00 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 23.966572][ T376] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd2c481c08e [ 23.966573][ T376] RDX: 0000000000000002 RSI: 00005562361c54b0 RDI: 0000000000000005 [ 23.966574][ T376] RBP: 00007ffd36187e10 R08: 0000000000000000 R09: 0000000000000000 [ 23.966574][ T376] R10: 0000000000000000 R11: 0000000000000202 R12: 00005562361c75e0 [ 23.966575][ T376] R13: 00005562361c5470 R14: 0000000000000002 R15: 0000000000000000 [ 23.966578][ T376] [ 24.132266][ T387] br1: port 1(veth1) entered disabled state [ 24.146730][ T388] veth1: left allmulticast mode [ 24.146865][ T388] veth1: left promiscuous mode [ 24.147018][ T388] br1: port 1(veth1) entered disabled state