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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

write to 0xffff888103b96840 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+0x380/0x710 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+0x27/0x40
 arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline]
 arch_atomic_long_read include/linux/atomic/atomic-long.h:29 [inline]
 atomic_long_read include/linux/atomic/atomic-instrumented.h:1266 [inline]
 find_watchpoint kernel/kcsan/core.c:129 [inline]
 check_access kernel/kcsan/core.c:726 [inline]
 __tsan_read8+0x28/0x180 kernel/kcsan/core.c:1014
 ext4_encode_extra_time fs/ext4/ext4.h:899 [inline]
 ext4_fill_raw_inode+0x593/0xea0 fs/ext4/inode.c:4367
 ext4_do_update_inode fs/ext4/inode.c:5130 [inline]
 ext4_mark_iloc_dirty+0x364/0x860 fs/ext4/inode.c:5727
 __ext4_mark_inode_dirty+0x452/0x610 fs/ext4/inode.c:5923
 ext4_add_nondir+0xa2/0x180 fs/ext4/namei.c:2738
 ext4_symlink+0x4dc/0x590 fs/ext4/namei.c:3374
 vfs_symlink+0x18a/0x280 fs/namei.c:4341
 do_symlinkat+0xe2/0x330 fs/namei.c:4370
 __do_sys_symlinkat fs/namei.c:4387 [inline]
 __se_sys_symlinkat fs/namei.c:4384 [inline]
 __x64_sys_symlinkat+0x5e/0x70 fs/namei.c:4384
 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+0x46/0xb0

read to 0xffff888103b96840 of 8 bytes by task 1918 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_leds+0xad/0x1b0 drivers/input/keyboard/atkbd.c:594
 atkbd_event_work+0xb9/0x2e0 drivers/input/keyboard/atkbd.c:634
 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: 1918 Comm: kworker/0:4 Not tainted 5.19.0-rc5-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events atkbd_event_work
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