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BUG: KCSAN: data-race in __ip4_datagram_connect / __ip_make_skb

read to 0xffff88810480356a of 2 bytes by task 9688 on cpu 0:
 ip_select_ident_segs include/net/ip.h:532 [inline]
 ip_select_ident include/net/ip.h:547 [inline]
 __ip_make_skb+0x856/0xc00 net/ipv4/ip_output.c:1556
 ip_make_skb+0x238/0x2c0 net/ipv4/ip_output.c:1660
 udp_sendmsg+0x111f/0x1200 net/ipv4/udp.c:1260
 inet_sendmsg+0x5f/0x80 net/ipv4/af_inet.c:827
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0x22d/0x2d0 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0x74/0x90 net/socket.c:2125
 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+0x63/0xcd

write to 0xffff88810480356a of 2 bytes by task 9687 on cpu 1:
 __ip4_datagram_connect+0x747/0x7a0 net/ipv4/datagram.c:76
 ip4_datagram_connect+0x2a/0x40 net/ipv4/datagram.c:90
 inet_dgram_connect+0x110/0x1a0 net/ipv4/af_inet.c:581
 __sys_connect_file net/socket.c:1976 [inline]
 __sys_connect+0x197/0x1b0 net/socket.c:1993
 __do_sys_connect net/socket.c:2003 [inline]
 __se_sys_connect net/socket.c:2000 [inline]
 __x64_sys_connect+0x3d/0x50 net/socket.c:2000
 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+0x63/0xcd

value changed: 0xb60e -> 0xb60f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9687 Comm: syz-executor.3 Tainted: G        W          6.2.0-rc1-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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