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BUG: KCSAN: data-race in n_tty_kick_worker / n_tty_receive_buf_common

read to 0xffffc9000125505c of 1 bytes by task 14990 on cpu 0:
 n_tty_kick_worker+0x2d/0x160 drivers/tty/n_tty.c:204
 n_tty_read+0x4a7/0x1070 drivers/tty/n_tty.c:2058
 iterate_tty_read drivers/tty/tty_io.c:858 [inline]
 tty_read+0x19c/0x430 drivers/tty/tty_io.c:933
 call_read_iter include/linux/fs.h:2068 [inline]
 io_iter_do_read fs/io_uring.c:3611 [inline]
 io_read fs/io_uring.c:3668 [inline]
 io_issue_sqe+0xb2e/0x98d0 fs/io_uring.c:6751
 __io_queue_sqe+0x20/0x6a0 fs/io_uring.c:7098
 io_req_task_submit fs/io_uring.c:2441 [inline]
 io_apoll_task_func+0x4b7/0x800 fs/io_uring.c:5601
 handle_tw_list fs/io_uring.c:2328 [inline]
 tctx_task_work+0x8b2/0xc90 fs/io_uring.c:2362
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:213 [inline]
 handle_signal_work kernel/entry/common.c:146 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x102/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffffc9000125505c of 1 bytes by task 1847 on cpu 1:
 n_tty_receive_buf_common+0x370/0x4e70 drivers/tty/n_tty.c:1635
 n_tty_receive_buf2+0x2e/0x40 drivers/tty/n_tty.c:1680
 tty_ldisc_receive_buf+0x5b/0xf0 drivers/tty/tty_buffer.c:451
 tty_port_default_receive_buf+0x54/0x80 drivers/tty/tty_port.c:39
 receive_buf drivers/tty/tty_buffer.c:471 [inline]
 flush_to_ldisc+0x1c5/0x300 drivers/tty/tty_buffer.c:521
 process_one_work+0x3f6/0x960 kernel/workqueue.c:2307
 worker_thread+0x616/0xa70 kernel/workqueue.c:2454
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1847 Comm: kworker/u4:5 Not tainted 5.17.0-rc1-syzkaller-00316-gdf0001545b27-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
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