================================================================== BUG: KCSAN: data-race in n_tty_write / tty_set_termios read-write to 0xffff88815d7cb514 of 4 bytes by task 12901 on cpu 1: unset_locked_termios drivers/tty/tty_ioctl.c:233 [inline] tty_set_termios+0x1b4/0x890 drivers/tty/tty_ioctl.c:355 set_termios+0x388/0x3c0 drivers/tty/tty_ioctl.c:438 tty_mode_ioctl+0x4fa/0x5d0 n_tty_ioctl_helper+0x83/0x340 drivers/tty/tty_ioctl.c:901 n_tty_ioctl+0xfc/0x1f0 drivers/tty/n_tty.c:2430 tty_ioctl+0x71e/0x970 drivers/tty/tty_io.c:2787 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856 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 read to 0xffff88815d7cb514 of 4 bytes by task 12889 on cpu 0: n_tty_write+0x88/0xb40 drivers/tty/n_tty.c:2274 do_tty_write drivers/tty/tty_io.c:1024 [inline] file_tty_write+0x3f9/0x650 drivers/tty/tty_io.c:1095 tty_write+0x24/0x30 drivers/tty/tty_io.c:1116 do_iter_readv_writev+0x27b/0x300 do_iter_write+0x16f/0x5c0 fs/read_write.c:868 vfs_writev fs/read_write.c:941 [inline] do_writev+0x256/0x4b0 fs/read_write.c:984 __do_sys_writev fs/read_write.c:1057 [inline] __se_sys_writev fs/read_write.c:1054 [inline] __x64_sys_writev+0x41/0x50 fs/read_write.c:1054 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 value changed: 0x00008a3b -> 0x00000002 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12889 Comm: syz-executor.4 Not tainted 5.19.0-rc7-syzkaller-00199-g515f71412bb7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================