IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
==================================================================
BUG: KCSAN: data-race in fib6_ifup / find_match

read to 0xffff8880a74d87af of 1 bytes by interrupt on cpu 1:
 find_match+0x52/0x790 net/ipv6/route.c:740
 __find_rr_leaf+0xe3/0x780 net/ipv6/route.c:831
 find_rr_leaf net/ipv6/route.c:852 [inline]
 rt6_select net/ipv6/route.c:896 [inline]
 fib6_table_lookup+0x383/0x650 net/ipv6/route.c:2164
 ip6_pol_route+0xee/0x5c0 net/ipv6/route.c:2200
 ip6_pol_route_input+0x4d/0x70 net/ipv6/route.c:2258
 fib6_rule_lookup+0x95/0x470 net/ipv6/fib6_rules.c:113
 ip6_route_input_lookup+0x9f/0xc0 net/ipv6/route.c:2270
 ip6_route_input+0x41e/0x4b0 net/ipv6/route.c:2442
 ip6_rcv_finish_core.isra.0+0x97/0x1f0 net/ipv6/ip6_input.c:63
 ip6_rcv_finish+0xee/0x140 net/ipv6/ip6_input.c:74
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ipv6_rcv+0x1a1/0x1b0 net/ipv6/ip6_input.c:284
 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:4929
 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5043
 process_backlog+0x207/0x4b0 net/core/dev.c:5874
 napi_poll net/core/dev.c:6311 [inline]
 net_rx_action+0x3ae/0xa90 net/core/dev.c:6379
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0xbb/0xe0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 arch_local_irq_enable arch/x86/include/asm/paravirt.h:766 [inline]
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
 _raw_spin_unlock_irq+0x4e/0x80 kernel/locking/spinlock.c:199
 spin_unlock_irq include/linux/spinlock.h:388 [inline]
 process_one_work+0x3b5/0x890 kernel/workqueue.c:2242
 worker_thread+0xa0/0x800 kernel/workqueue.c:2415
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

write to 0xffff8880a74d87af of 1 bytes by task 8055 on cpu 0:
 fib6_ifup+0xd7/0x100 net/ipv6/route.c:4588
 fib6_clean_node+0x194/0x310 net/ipv6/ip6_fib.c:2077
 fib6_walk_continue+0x2e3/0x440 net/ipv6/ip6_fib.c:2002
 fib6_walk+0x10d/0x160 net/ipv6/ip6_fib.c:2050
 fib6_clean_tree+0xef/0x120 net/ipv6/ip6_fib.c:2130
 __fib6_clean_all+0xbd/0x150 net/ipv6/ip6_fib.c:2146
 fib6_clean_all+0x34/0x50 net/ipv6/ip6_fib.c:2157
 rt6_sync_up+0x9f/0x110 net/ipv6/route.c:4608
 addrconf_notify+0x254/0x1480 net/ipv6/addrconf.c:3604
 notifier_call_chain+0xd7/0x160 kernel/notifier.c:95
 __raw_notifier_call_chain kernel/notifier.c:396 [inline]
 raw_notifier_call_chain+0x37/0x50 kernel/notifier.c:403
 call_netdevice_notifiers_info+0x48/0xc0 net/core/dev.c:1668
 netdev_state_change net/core/dev.c:1271 [inline]
 netdev_state_change+0xb2/0xd0 net/core/dev.c:1264
 linkwatch_do_dev+0xd8/0xf0 net/core/link_watch.c:159
 __linkwatch_run_queue+0x1a9/0x510 net/core/link_watch.c:204
 linkwatch_event+0x54/0x70 net/core/link_watch.c:243
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269
 worker_thread+0xa0/0x800 kernel/workqueue.c:2415
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8055 Comm: kworker/0:4 Not tainted 5.4.0-rc6+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events linkwatch_event
==================================================================