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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

write to 0xffff888103be2040 of 8 bytes by interrupt on cpu 1:
 ps2_handle_ack+0x1b3/0x320 drivers/input/serio/libps2.c:444
 atkbd_interrupt+0xa5b/0xc30 drivers/input/keyboard/atkbd.c:422
 serio_interrupt+0x5d/0xe0 drivers/input/serio/serio.c:1001
 i8042_interrupt+0x37e/0x710 drivers/input/serio/i8042.c:606
 __handle_irq_event_percpu+0x92/0x400 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0x60/0xf0 kernel/irq/handle.c:210
 handle_edge_irq+0x17e/0x5a0 kernel/irq/chip.c:817
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq arch/x86/kernel/irq.c:231 [inline]
 __common_interrupt+0x60/0x100 arch/x86/kernel/irq.c:250
 common_interrupt+0x9a/0xc0 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x1e/0x40
 get_page_from_freelist+0x22/0x590 mm/page_alloc.c:4068
 __alloc_pages+0x17c/0x320 mm/page_alloc.c:5408
 alloc_pages_vma+0x66d/0x7e0 mm/mempolicy.c:2220
 do_anonymous_page+0x15c/0xa10 mm/memory.c:3826
 handle_pte_fault mm/memory.c:4625 [inline]
 __handle_mm_fault mm/memory.c:4763 [inline]
 handle_mm_fault+0x83c/0xa40 mm/memory.c:4861
 do_user_addr_fault+0x4cd/0x940 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30

read to 0xffff888103be2040 of 8 bytes by task 23510 on cpu 0:
 ps2_do_sendbyte+0x12e/0x380 drivers/input/serio/libps2.c:45
 __ps2_command+0x35e/0x8c0 drivers/input/serio/libps2.c:273
 ps2_command+0x51/0x90 drivers/input/serio/libps2.c:332
 atkbd_set_repeat_rate drivers/input/keyboard/atkbd.c:583 [inline]
 atkbd_event_work+0x2a8/0x2e0 drivers/input/keyboard/atkbd.c:637
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000000001 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23510 Comm: kworker/0:12 Not tainted 5.18.0-rc4-syzkaller-00036-gcf424ef014ac-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events atkbd_event_work
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