==================================================================
BUG: KCSAN: data-race in tcp_connect / tcp_poll

write to 0xffff88813a9fd5b0 of 4 bytes by task 22610 on cpu 1:
 tcp_connect_init net/ipv4/tcp_output.c:3678 [inline]
 tcp_connect+0xa62/0x1d90 net/ipv4/tcp_output.c:3818
 tcp_v4_connect+0xadf/0xbb0 net/ipv4/tcp_ipv4.c:312
 __inet_stream_connect+0x156/0x6e0 net/ipv4/af_inet.c:660
 inet_stream_connect+0x44/0x70 net/ipv4/af_inet.c:724
 __sys_connect_file+0xd3/0xe0 net/socket.c:1896
 io_connect fs/io_uring.c:5250 [inline]
 io_issue_sqe+0x2b4a/0x53b0 fs/io_uring.c:6716
 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6840
 io_worker_handle_work+0x4ca/0xbd0 fs/io-wq.c:576
 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:632
 ret_from_fork+0x1f/0x30

read to 0xffff88813a9fd5b0 of 4 bytes by task 22398 on cpu 0:
 tcp_poll+0x510/0x580 net/ipv4/tcp.c:588
 sock_poll+0x23e/0x260 net/socket.c:1302
 vfs_poll include/linux/poll.h:90 [inline]
 __io_arm_poll_handler+0x1a8/0x780 fs/io_uring.c:5621
 io_arm_poll_handler+0x25e/0x3d0 fs/io_uring.c:5687
 io_queue_sqe_arm_apoll fs/io_uring.c:6999 [inline]
 __io_queue_sqe+0x16b/0x440 fs/io_uring.c:7037
 io_queue_sqe fs/io_uring.c:7064 [inline]
 io_submit_sqe+0x77a/0x47d3 fs/io_uring.c:7267
 io_submit_sqes+0x25d/0x670 fs/io_uring.c:7373
 __do_sys_io_uring_enter fs/io_uring.c:10076 [inline]
 __se_sys_io_uring_enter+0x212/0xb00 fs/io_uring.c:10018
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10018
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000006f -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 22398 Comm: syz-executor.4 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================