================================================================== BUG: KCSAN: data-race in n_tty_kick_worker / n_tty_receive_buf_common read to 0xffffc9000024b05c of 1 bytes by task 31030 on cpu 0: n_tty_kick_worker+0x2d/0x160 drivers/tty/n_tty.c:207 n_tty_read+0x5fe/0x1170 drivers/tty/n_tty.c:2158 iterate_tty_read drivers/tty/tty_io.c:852 [inline] tty_read+0x17d/0x3e0 drivers/tty/tty_io.c:927 do_iter_read+0x492/0x760 fs/read_write.c:796 vfs_readv fs/read_write.c:916 [inline] do_readv+0x17b/0x2b0 fs/read_write.c:953 __do_sys_readv fs/read_write.c:1044 [inline] __se_sys_readv fs/read_write.c:1041 [inline] __x64_sys_readv+0x41/0x50 fs/read_write.c:1041 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd write to 0xffffc9000024b05c of 1 bytes by task 3749 on cpu 1: n_tty_receive_buf_common+0x273/0xbf0 drivers/tty/n_tty.c:1701 n_tty_receive_buf2+0x2e/0x40 drivers/tty/n_tty.c:1746 tty_ldisc_receive_buf+0x5b/0xf0 drivers/tty/tty_buffer.c:457 tty_port_default_receive_buf+0x54/0x80 drivers/tty/tty_port.c:39 receive_buf drivers/tty/tty_buffer.c:515 [inline] flush_to_ldisc+0x1d9/0x470 drivers/tty/tty_buffer.c:565 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3749 Comm: kworker/u4:10 Tainted: G W 6.1.0-rc6-syzkaller-00012-g4312098baf37-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound flush_to_ldisc ==================================================================