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BUG: KCSAN: data-race in netlink_recvmsg / netlink_recvmsg

read to 0xffff88813b722338 of 8 bytes by task 9499 on cpu 1:
 netlink_recvmsg+0x10f/0x810 net/netlink/af_netlink.c:1963
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 __sys_recvfrom+0x204/0x2c0 net/socket.c:2093
 __do_sys_recvfrom net/socket.c:2111 [inline]
 __se_sys_recvfrom net/socket.c:2107 [inline]
 __x64_sys_recvfrom+0x74/0x90 net/socket.c:2107
 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

write to 0xffff88813b722338 of 8 bytes by task 9459 on cpu 0:
 netlink_recvmsg+0x150/0x810 net/netlink/af_netlink.c:1964
 sock_recvmsg_nosec net/socket.c:944 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 __sys_recvfrom+0x204/0x2c0 net/socket.c:2093
 __do_sys_recvfrom net/socket.c:2111 [inline]
 __se_sys_recvfrom net/socket.c:2107 [inline]
 __x64_sys_recvfrom+0x74/0x90 net/socket.c:2107
 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: 0x0000000000000000 -> 0x0000000000001000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9459 Comm: syz-executor.1 Tainted: G        W         5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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