KCSAN: data-race in __fput / __tty

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __fput / __tty_hangup (3) serial	6	2	1086d	1104d	0/29	auto-closed as invalid on 2022/08/23 04:41
upstream	KCSAN: data-race in __fput / __tty_hangup (4) serial	6	7	185d	810d	1/29	upstream: reported on 2023/04/21 08:18
upstream	KCSAN: data-race in __fput / __tty_hangup (2) serial	6	1	1141d	1141d	0/29	auto-closed as invalid on 2022/06/29 01:31

================================================================== BUG: KCSAN: data-race in __fput / __tty_hangup write to 0xffff888124a6e828 of 8 bytes by task 10825 on cpu 0: __tty_hangup+0x23a/0x610 drivers/tty/tty_io.c:616 tty_vhangup+0x13/0x20 drivers/tty/tty_io.c:698 pty_close+0x298/0x2c0 drivers/tty/pty.c:79 tty_release+0x255/0xa00 drivers/tty/tty_io.c:1679 __fput+0x1df/0x460 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:135 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:239 [inline] __prepare_exit_to_usermode+0x1c6/0x230 arch/x86/entry/common.c:269 __syscall_return_slowpath+0x47/0x60 arch/x86/entry/common.c:352 do_syscall_64+0x5d/0xb0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888124a6e828 of 8 bytes by task 10826 on cpu 1: __fput+0x1b6/0x460 fs/file_table.c:280 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:135 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:239 [inline] __prepare_exit_to_usermode+0x1c6/0x230 arch/x86/entry/common.c:269 __syscall_return_slowpath+0x47/0x60 arch/x86/entry/common.c:352 do_syscall_64+0x5d/0xb0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10826 Comm: syz-executor.3 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================