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BUG: KCSAN: data-race in __stop_tty / do_con_write

write to 0xffff88813a5559bc of 1 bytes by task 31840 on cpu 0:
 __stop_tty+0x42/0x90 drivers/tty/tty_io.c:753
 n_tty_ioctl_helper+0x21f/0x240 drivers/tty/tty_ioctl.c:961
 n_tty_ioctl+0xfd/0x200 drivers/tty/n_tty.c:2516
 tty_ioctl+0x875/0xbc0 drivers/tty/tty_io.c:2785
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 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 0xffff88813a5559bc of 1 bytes by task 31822 on cpu 1:
 do_con_write+0x1459/0x35d0 drivers/tty/vt/vt.c:2885
 con_put_char+0x39/0x60 drivers/tty/vt/vt.c:3253
 tty_put_char+0x63/0xb0 drivers/tty/tty_io.c:3140
 n_tty_process_echo_ops drivers/tty/n_tty.c:669 [inline]
 __process_echoes+0x3a3/0x6a0 drivers/tty/n_tty.c:714
 commit_echoes drivers/tty/n_tty.c:777 [inline]
 n_tty_receive_char+0x5fe/0x670 drivers/tty/n_tty.c:1442
 n_tty_receive_buf_standard+0x4bd/0x2e20 drivers/tty/n_tty.c:1611
 __receive_buf drivers/tty/n_tty.c:1635 [inline]
 n_tty_receive_buf_common+0x7e5/0xbc0 drivers/tty/n_tty.c:1734
 n_tty_receive_buf2+0x33/0x40 drivers/tty/n_tty.c:1780
 tty_ldisc_receive_buf+0x60/0xe0 drivers/tty/tty_buffer.c:387
 paste_selection+0x1dd/0x2e0 drivers/tty/vt/selection.c:409
 tioclinux+0x2a5/0x450 drivers/tty/vt/vt.c:3161
 vt_ioctl+0x84e/0x1830 drivers/tty/vt/vt_ioctl.c:762
 tty_ioctl+0x816/0xbc0 drivers/tty/tty_io.c:2776
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 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

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31822 Comm: syz-executor.4 Not tainted 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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