==================================================================
BUG: KCSAN: data-race in __skb_wait_for_more_packets / inet_shutdown

write to 0xffff8880b0263d6a of 1 bytes by task 20106 on cpu 0:
 inet_shutdown+0x105/0x270 net/ipv4/af_inet.c:877
 __sys_shutdown+0xa2/0x130 net/socket.c:2193
 __do_sys_shutdown net/socket.c:2201 [inline]
 __se_sys_shutdown net/socket.c:2199 [inline]
 __x64_sys_shutdown+0x3a/0x50 net/socket.c:2199
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880b0263d6a of 1 bytes by task 20105 on cpu 1:
 __skb_wait_for_more_packets+0x17e/0x330 net/core/datagram.c:104
 __skb_recv_udp+0x3c4/0x560 net/ipv4/udp.c:1711
 udp_recvmsg+0xe4/0xb70 net/ipv4/udp.c:1740
 inet_recvmsg+0xbb/0x250 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:873 [inline]
 sock_recvmsg net/socket.c:891 [inline]
 sock_recvmsg+0x92/0xb0 net/socket.c:887
 __sys_recvfrom+0x1ae/0x2d0 net/socket.c:2042
 __do_sys_recvfrom net/socket.c:2060 [inline]
 __se_sys_recvfrom net/socket.c:2056 [inline]
 __x64_sys_recvfrom+0x89/0xb0 net/socket.c:2056
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 20105 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================