================================================================== BUG: KCSAN: data-race in n_tty_write / tty_set_termios read-write to 0xffff8881375e8914 of 4 bytes by task 13707 on cpu 1: unset_locked_termios drivers/tty/tty_ioctl.c:217 [inline] tty_set_termios+0x1a2/0x8b0 drivers/tty/tty_ioctl.c:340 set_termios+0x365/0x4e0 drivers/tty/tty_ioctl.c:520 tty_mode_ioctl+0x391/0x5d0 n_tty_ioctl_helper+0x8d/0x240 drivers/tty/tty_ioctl.c:986 n_tty_ioctl+0xfd/0x200 drivers/tty/n_tty.c:2521 tty_ioctl+0x87a/0xbe0 drivers/tty/tty_io.c:2812 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:892 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892 x64_sys_call+0x1690/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881375e8914 of 4 bytes by task 13706 on cpu 0: n_tty_write+0xa0/0xb80 drivers/tty/n_tty.c:2366 iterate_tty_write drivers/tty/tty_io.c:1015 [inline] file_tty_write+0x37a/0x680 drivers/tty/tty_io.c:1090 tty_write+0x28/0x30 drivers/tty/tty_io.c:1111 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x77f/0x920 fs/read_write.c:679 ksys_write+0xe8/0x1b0 fs/read_write.c:731 __do_sys_write fs/read_write.c:742 [inline] __se_sys_write fs/read_write.c:739 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:739 x64_sys_call+0x287e/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00008a3b -> 0x000001ff Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 13706 Comm: syz.2.38263 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================