IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
==================================================================
BUG: KCSAN: data-race in pcpu_alloc / pcpu_free_area

write to 0xffffffff86046740 of 4 bytes by task 7371 on cpu 0:
 pcpu_update_empty_pages mm/percpu.c:575 [inline]
 pcpu_block_update_hint_free mm/percpu.c:1012 [inline]
 pcpu_free_area+0x448/0x6a0 mm/percpu.c:1267
 free_percpu mm/percpu.c:1975 [inline]
 free_percpu+0x152/0x440 mm/percpu.c:1955
 xt_percpu_counter_free+0x82/0xa0 net/netfilter/x_tables.c:1862
 cleanup_entry+0x12a/0x160 net/ipv6/netfilter/ip6_tables.c:672
 __do_replace+0x439/0x510 net/ipv6/netfilter/ip6_tables.c:1102
 do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline]
 do_ip6t_set_ctl+0x26d/0x311 net/ipv6/netfilter/ip6_tables.c:1681
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x6e/0xb0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt net/ipv6/ipv6_sockglue.c:949 [inline]
 ipv6_setsockopt+0x119/0x130 net/ipv6/ipv6_sockglue.c:933
 tcp_setsockopt net/ipv4/tcp.c:3148 [inline]
 tcp_setsockopt+0x7c/0xc0 net/ipv4/tcp.c:3142
 sock_common_setsockopt+0x67/0x90 net/core/sock.c:3147
 __sys_setsockopt+0x1ce/0x370 net/socket.c:2084
 __do_sys_setsockopt net/socket.c:2100 [inline]
 __se_sys_setsockopt net/socket.c:2097 [inline]
 __x64_sys_setsockopt+0x70/0x90 net/socket.c:2097
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff86046740 of 4 bytes by task 44 on cpu 1:
 pcpu_alloc+0x3b0/0xcf0 mm/percpu.c:1729
 __alloc_percpu_gfp+0x31/0x50 mm/percpu.c:1783
 fib_nh_common_init+0x58/0x1e0 net/ipv4/fib_semantics.c:572
 fib6_nh_init+0x2aa/0xee0 net/ipv6/route.c:3466
 ip6_route_info_create+0x913/0xd40 net/ipv6/route.c:3655
 ip6_route_add+0x30/0xd0 net/ipv6/route.c:3695
 addrconf_add_mroute+0x177/0x1a0 net/ipv6/addrconf.c:2459
 addrconf_add_dev+0x100/0x170 net/ipv6/addrconf.c:2477
 addrconf_dev_config+0x170/0x280 net/ipv6/addrconf.c:3351
 addrconf_notify+0x1fa/0x1480 net/ipv6/addrconf.c:3595
 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:1749

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 44 Comm: kworker/1:1 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events linkwatch_event
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