================================================================== BUG: KCSAN: data-race in commit_echoes / n_tty_receive_char_special write to 0xffffc90000e0f018 of 8 bytes by task 14210 on cpu 1: add_echo_byte drivers/tty/n_tty.c:845 [inline] echo_char_raw drivers/tty/n_tty.c:923 [inline] eraser drivers/tty/n_tty.c:1079 [inline] n_tty_receive_char_special+0x11b3/0x1c10 drivers/tty/n_tty.c:1316 n_tty_receive_buf_fast drivers/tty/n_tty.c:1610 [inline] __receive_buf drivers/tty/n_tty.c:1644 [inline] n_tty_receive_buf_common+0x1844/0x1b00 drivers/tty/n_tty.c:1742 n_tty_receive_buf+0x3a/0x50 drivers/tty/n_tty.c:1771 tiocsti drivers/tty/tty_io.c:2200 [inline] tty_ioctl+0xb75/0xe10 drivers/tty/tty_io.c:2576 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x84f/0xcf0 fs/ioctl.c:732 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffc90000e0f018 of 8 bytes by task 9182 on cpu 0: commit_echoes+0x4f/0x170 drivers/tty/n_tty.c:779 n_tty_receive_char_fast drivers/tty/n_tty.c:1449 [inline] n_tty_receive_buf_fast drivers/tty/n_tty.c:1609 [inline] __receive_buf drivers/tty/n_tty.c:1644 [inline] n_tty_receive_buf_common+0x1741/0x1b00 drivers/tty/n_tty.c:1742 n_tty_receive_buf2+0x3d/0x60 drivers/tty/n_tty.c:1777 tty_ldisc_receive_buf+0x71/0xf0 drivers/tty/tty_buffer.c:461 tty_port_default_receive_buf+0x87/0xd0 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x1d5/0x260 drivers/tty/tty_buffer.c:533 process_one_work+0x40b/0x8d0 kernel/workqueue.c:2264 worker_thread+0xa0/0x800 kernel/workqueue.c:2410 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9182 Comm: kworker/u4:7 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound flush_to_ldisc ==================================================================