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BUG: KCSAN: data-race in __ps2_command / ps2_interrupt

write to 0xffff888103b44e58 of 1 bytes by interrupt on cpu 0:
 ps2_handle_response drivers/input/serio/libps2.c:479 [inline]
 ps2_interrupt+0x1be/0x550 drivers/input/serio/libps2.c:608
 serio_interrupt+0x66/0xf0 drivers/input/serio/serio.c:967
 i8042_handle_data+0x388/0x680 drivers/input/serio/i8042.c:598
 i8042_interrupt+0x15/0x90 drivers/input/serio/i8042.c:605
 __handle_irq_event_percpu+0x8b/0x480 kernel/irq/handle.c:209
 handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
 handle_irq_event+0x64/0xf0 kernel/irq/handle.c:263
 handle_edge_irq+0x155/0x440 kernel/irq/chip.c:859
 generic_handle_irq_desc include/linux/irqdesc.h:188 [inline]
 handle_irq arch/x86/kernel/irq.c:209 [inline]
 call_irq_handler arch/x86/kernel/irq.c:-1 [inline]
 __common_interrupt+0x60/0xb0 arch/x86/kernel/irq.c:280
 common_interrupt+0x7e/0x90 arch/x86/kernel/irq.c:273
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:665
 kcsan_setup_watchpoint+0x42b/0x4a0 kernel/kcsan/core.c:713
 iov_iter_init lib/iov_iter.c:179 [inline]
 __import_iovec+0x2b3/0x530 lib/iov_iter.c:1406
 import_iovec+0x60/0x80 lib/iov_iter.c:1440
 copy_msghdr_from_user net/socket.c:2650 [inline]
 recvmsg_copy_msghdr net/socket.c:2899 [inline]
 ___sys_recvmsg+0x385/0x3a0 net/socket.c:2971
 do_recvmmsg+0x1e5/0x560 net/socket.c:3070
 __sys_recvmmsg net/socket.c:3144 [inline]
 __do_sys_recvmmsg net/socket.c:3167 [inline]
 __se_sys_recvmmsg net/socket.c:3160 [inline]
 __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3160
 x64_sys_call+0x77f/0x2550 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888103b44e58 of 1 bytes by task 3418 on cpu 1:
 __ps2_command+0x591/0xaa0 drivers/input/serio/libps2.c:343
 ps2_command+0x52/0x90 drivers/input/serio/libps2.c:403
 psmouse_reset drivers/input/mouse/psmouse-base.c:433 [inline]
 psmouse_extensions+0x68f/0x960 drivers/input/mouse/psmouse-base.c:1191
 __psmouse_reconnect+0x3dd/0x880 drivers/input/mouse/psmouse-base.c:1685
 psmouse_reconnect+0x23/0x40 drivers/input/mouse/psmouse-base.c:1723
 serio_reconnect_driver drivers/input/serio/serio.c:52 [inline]
 serio_reconnect_port drivers/input/serio/serio.c:558 [inline]
 serio_handle_event+0x1c7/0xac0 drivers/input/serio/serio.c:201
 process_one_work kernel/workqueue.c:3387 [inline]
 process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3470
 worker_thread+0x569/0x750 kernel/workqueue.c:3551
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3418 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_long serio_handle_event
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