syzbot

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BUG: KCSAN: data-race in dccp_disconnect / dccp_poll

write to 0xffff888123eb772c of 1 bytes by task 3039 on cpu 0:
 dccp_disconnect+0x3f8/0x500 net/dccp/proto.c:290
 __inet_stream_connect+0x5dd/0x6e0 net/ipv4/af_inet.c:715
 inet_stream_connect+0x48/0x70 net/ipv4/af_inet.c:727
 __sys_connect_file+0xd7/0xe0 net/socket.c:2001
 io_connect+0x1a5/0x3f0 io_uring/net.c:1463
 io_issue_sqe+0x175/0x5a0 io_uring/io_uring.c:1907
 io_wq_submit_work+0x1f5/0x350 io_uring/io_uring.c:1983
 io_worker_handle_work+0x4ad/0x9b0 io_uring/io-wq.c:587
 io_wqe_worker+0x267/0x8a0 io_uring/io-wq.c:632
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888123eb772c of 1 bytes by task 3047 on cpu 1:
 dccp_poll+0xe4/0x3c0 net/dccp/proto.c:331
 sock_poll+0x253/0x270 net/socket.c:1383
 vfs_poll include/linux/poll.h:88 [inline]
 __io_arm_poll_handler+0x205/0xe30 io_uring/poll.c:600
 io_arm_poll_handler+0x48b/0x5e0 io_uring/poll.c:735
 io_wq_submit_work+0x262/0x350 io_uring/io_uring.c:1998
 io_worker_handle_work+0x4ad/0x9b0 io_uring/io-wq.c:587
 io_wqe_worker+0x267/0x8a0 io_uring/io-wq.c:632
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0x03 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3047 Comm: iou-wrk-3027 Not tainted 6.3.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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