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BUG: KCSAN: data-race in netlink_getname / netlink_insert

write to 0xffff888163271308 of 4 bytes by task 11960 on cpu 0:
 netlink_insert+0xe8/0x900 net/netlink/af_netlink.c:581
 netlink_autobind+0xae/0x160 net/netlink/af_netlink.c:843
 netlink_sendmsg+0x4bb/0x850 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg net/socket.c:725 [inline]
 __sys_sendto+0x21e/0x2c0 net/socket.c:2040
 __do_sys_sendto net/socket.c:2052 [inline]
 __se_sys_sendto net/socket.c:2048 [inline]
 __x64_sys_sendto+0x74/0x90 net/socket.c:2048
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888163271308 of 4 bytes by task 11963 on cpu 1:
 netlink_getname+0xbb/0x180 net/netlink/af_netlink.c:1131
 __sys_getsockname+0x11d/0x1b0 net/socket.c:1950
 __do_sys_getsockname net/socket.c:1965 [inline]
 __se_sys_getsockname net/socket.c:1962 [inline]
 __x64_sys_getsockname+0x3e/0x50 net/socket.c:1962
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000 -> 0x0000603a

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11963 Comm: syz-executor.3 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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