syzbot

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BUG: KCSAN: data-race in tcp_disconnect / tcp_poll

write to 0xffff88814588582c of 1 bytes by task 3404 on cpu 1:
 tcp_disconnect+0x4d6/0xdb0 net/ipv4/tcp.c:3121
 __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 net/socket.c:2001 [inline]
 __sys_connect+0x19b/0x1b0 net/socket.c:2018
 __do_sys_connect net/socket.c:2028 [inline]
 __se_sys_connect net/socket.c:2025 [inline]
 __x64_sys_connect+0x41/0x50 net/socket.c:2025
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88814588582c of 1 bytes by task 3374 on cpu 0:
 tcp_poll+0x2e6/0x7d0 net/ipv4/tcp.c:562
 sock_poll+0x253/0x270 net/socket.c:1383
 vfs_poll include/linux/poll.h:88 [inline]
 io_poll_check_events io_uring/poll.c:281 [inline]
 io_poll_task_func+0x15a/0x820 io_uring/poll.c:333
 handle_tw_list io_uring/io_uring.c:1184 [inline]
 tctx_task_work+0x1fe/0x4d0 io_uring/io_uring.c:1246
 task_work_run+0x123/0x160 kernel/task_work.c:179
 get_signal+0xe64/0xff0 kernel/signal.c:2635
 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x03 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3374 Comm: syz-executor.0 Not tainted 6.3.0-rc6-syzkaller-00188-g3e7bb4f24617 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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