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BUG: KCSAN: data-race in __netlink_dump_start / netlink_recvmsg

write to 0xffff888108425b51 of 1 bytes by task 14797 on cpu 0:
 __netlink_dump_start+0x3b2/0x4e0 net/netlink/af_netlink.c:2370
 netlink_dump_start include/linux/netlink.h:245 [inline]
 ctnetlink_stat_exp_cpu+0xad/0xe0 net/netfilter/nf_conntrack_netlink.c:3768
 nfnetlink_rcv_msg+0x4d0/0x590 net/netfilter/nfnetlink.c:296
 netlink_rcv_skb+0x14e/0x250 net/netlink/af_netlink.c:2496
 nfnetlink_rcv+0x17c/0x13d0 net/netfilter/nfnetlink.c:654
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x60b/0x6d0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x72b/0x850 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 ____sys_sendmsg+0x39a/0x510 net/socket.c:2413
 ___sys_sendmsg net/socket.c:2467 [inline]
 __sys_sendmsg+0x195/0x230 net/socket.c:2496
 __do_sys_sendmsg net/socket.c:2505 [inline]
 __se_sys_sendmsg net/socket.c:2503 [inline]
 __x64_sys_sendmsg+0x42/0x50 net/socket.c:2503
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888108425b51 of 1 bytes by task 14799 on cpu 1:
 netlink_recvmsg+0x431/0x810 net/netlink/af_netlink.c:2002
 ____sys_recvmsg+0x16c/0x320
 ___sys_recvmsg net/socket.c:2674 [inline]
 __sys_recvmsg+0x209/0x3f0 net/socket.c:2704
 __do_sys_recvmsg net/socket.c:2714 [inline]
 __se_sys_recvmsg net/socket.c:2711 [inline]
 __x64_sys_recvmsg+0x42/0x50 net/socket.c:2711
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14799 Comm: syz-executor.2 Not tainted 5.17.0-syzkaller-10753-gbddac7c1e02b-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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