================================================================== BUG: KCSAN: data-race in n_tty_receive_buf_common / n_tty_receive_buf_common write to 0xffffc90001421000 of 8 bytes by task 10992 on cpu 0: put_tty_queue drivers/tty/n_tty.c:320 [inline] n_tty_receive_char_fast drivers/tty/n_tty.c:1451 [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+0x146a/0x1df0 drivers/tty/n_tty.c:1742 n_tty_receive_buf+0x2b/0x40 drivers/tty/n_tty.c:1771 tiocsti drivers/tty/tty_io.c:2198 [inline] tty_ioctl+0x928/0x1030 drivers/tty/tty_io.c:2572 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffc90001421000 of 8 bytes by task 22016 on cpu 1: n_tty_receive_char_fast drivers/tty/n_tty.c:1446 [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+0xf75/0x1df0 drivers/tty/n_tty.c:1742 n_tty_receive_buf2+0x2e/0x40 drivers/tty/n_tty.c:1777 tty_ldisc_receive_buf+0x61/0xf0 drivers/tty/tty_buffer.c:461 paste_selection+0x250/0x340 drivers/tty/vt/selection.c:408 tioclinux+0xe5/0x450 drivers/tty/vt/vt.c:3164 vt_ioctl+0xde0/0x20e0 drivers/tty/vt/vt_ioctl.c:823 tty_ioctl+0xa34/0x1030 drivers/tty/tty_io.c:2656 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22016 Comm: syz-executor.1 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================