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BUG: KCSAN: data-race in dccp_disconnect / dccp_poll

write to 0xffff888137b9f7a2 of 1 bytes by task 11556 on cpu 0:
 dccp_disconnect+0x4d9/0x5f0 net/dccp/proto.c:285
 __inet_stream_connect+0x5cc/0x6d0 net/ipv4/af_inet.c:712
 inet_stream_connect+0x44/0x70 net/ipv4/af_inet.c:724
 __sys_connect_file+0xd3/0xe0 net/socket.c:1979
 io_connect fs/io_uring.c:6693 [inline]
 io_issue_sqe+0x607b/0xaac0 fs/io_uring.c:8386
 io_wq_submit_work+0x41b/0x590 fs/io_uring.c:8534
 io_worker_handle_work+0x517/0xc50 fs/io-wq.c:597
 io_wqe_worker+0x1d1/0x940 fs/io-wq.c:644
 ret_from_fork+0x1f/0x30

read to 0xffff888137b9f7a2 of 1 bytes by task 11540 on cpu 1:
 dccp_poll+0xe0/0x3c0 net/dccp/proto.c:326
 sock_poll+0x23e/0x260 net/socket.c:1353
 vfs_poll include/linux/poll.h:88 [inline]
 __io_arm_poll_handler+0x1b9/0x570 fs/io_uring.c:7138
 io_arm_poll_handler+0x370/0x430 fs/io_uring.c:7242
 io_queue_async+0x7b/0x160 fs/io_uring.c:8704
 io_queue_sqe fs/io_uring.c:8742 [inline]
 io_submit_sqe+0x3a17/0x3f50 fs/io_uring.c:8993
 io_submit_sqes+0x27b/0x500 fs/io_uring.c:9104
 __do_sys_io_uring_enter fs/io_uring.c:12051 [inline]
 __se_sys_io_uring_enter+0x24b/0xd60 fs/io_uring.c:11977
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:11977
 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: 0x03 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11540 Comm: syz-executor.3 Not tainted 5.19.0-rc8-syzkaller-00152-g620725263f42-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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