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BUG: KCSAN: data-race in inet_dgram_connect / udp_lib_get_port

write to 0xffff88809c4b520e of 2 bytes by task 17744 on cpu 0:
 udp_lib_get_port+0x4c6/0xd10 net/ipv4/udp.c:304
 udp_v4_get_port+0xff/0x120 net/ipv4/udp.c:350
 __inet_bind+0x380/0x6b0 net/ipv4/af_inet.c:524
 inet_bind+0xc6/0x110 net/ipv4/af_inet.c:453
 __sys_bind+0x1df/0x220 net/socket.c:1647
 __do_sys_bind net/socket.c:1658 [inline]
 __se_sys_bind net/socket.c:1656 [inline]
 __x64_sys_bind+0x4c/0x60 net/socket.c:1656
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88809c4b520e of 2 bytes by task 17748 on cpu 1:
 inet_dgram_connect+0x8e/0x1a0 net/ipv4/af_inet.c:569
 __sys_connect+0x1e9/0x250 net/socket.c:1828
 __do_sys_connect net/socket.c:1839 [inline]
 __se_sys_connect net/socket.c:1836 [inline]
 __x64_sys_connect+0x4c/0x60 net/socket.c:1836
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17748 Comm: syz-executor.4 Not tainted 5.4.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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