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BUG: KCSAN: data-race in __skb_wait_for_more_packets / inet_shutdown

write to 0xffff888132f9a6aa of 1 bytes by task 27698 on cpu 0:
 inet_shutdown+0x148/0x200 net/ipv4/af_inet.c:891
 __sys_shutdown_sock net/socket.c:2189 [inline]
 __sys_shutdown net/socket.c:2201 [inline]
 __do_sys_shutdown net/socket.c:2209 [inline]
 __se_sys_shutdown+0xf6/0x140 net/socket.c:2207
 __x64_sys_shutdown+0x2d/0x40 net/socket.c:2207
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888132f9a6aa of 1 bytes by task 27681 on cpu 1:
 __skb_wait_for_more_packets+0xdd/0x2e0 net/core/datagram.c:106
 __skb_recv_udp+0x761/0x890 net/ipv4/udp.c:1776
 udp_recvmsg+0x155/0xa40 net/ipv4/udp.c:1835
 inet_recvmsg+0xa3/0x200 net/ipv4/af_inet.c:852
 ____sys_recvmsg+0x15d/0x310 include/linux/uio.h:244
 ___sys_recvmsg net/socket.c:2611 [inline]
 __sys_recvmsg+0x1d2/0x3a0 net/socket.c:2641
 __do_sys_recvmsg net/socket.c:2651 [inline]
 __se_sys_recvmsg net/socket.c:2648 [inline]
 __x64_sys_recvmsg+0x42/0x50 net/socket.c:2648
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 27681 Comm: syz-executor.0 Not tainted 5.13.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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