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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

write to 0xffff888103786040 of 8 bytes by interrupt on cpu 1:
 ps2_handle_ack+0x1b3/0x320 drivers/input/serio/libps2.c:447
 atkbd_interrupt+0xa5b/0xc30 drivers/input/keyboard/atkbd.c:424
 serio_interrupt+0x5d/0xe0 drivers/input/serio/serio.c:998
 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:819
 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+0x22/0x40 arch/x86/include/asm/idtentry.h:640
 check_access kernel/kcsan/core.c:741 [inline]
 __tsan_read8+0x153/0x180 kernel/kcsan/core.c:1014
 EXT4_SB fs/ext4/ext4.h:1769 [inline]
 ext4_get_groups_count fs/ext4/ext4.h:3343 [inline]
 ext4_get_group_desc+0x29/0x190 fs/ext4/balloc.c:270
 __ext4_get_inode_loc+0x109/0x870 fs/ext4/inode.c:4466
 ext4_get_inode_loc fs/ext4/inode.c:4607 [inline]
 ext4_reserve_inode_write+0xac/0x1f0 fs/ext4/inode.c:5804
 ext4_orphan_add+0x5d8/0xa00 fs/ext4/orphan.c:144
 __ext4_unlink+0x2f4/0x4c0 fs/ext4/namei.c:3255
 ext4_unlink+0x1ea/0x3b0 fs/ext4/namei.c:3291
 vfs_unlink+0x25d/0x3e0 fs/namei.c:4252
 do_unlinkat+0x258/0x510 fs/namei.c:4320
 __do_sys_unlink fs/namei.c:4368 [inline]
 __se_sys_unlink fs/namei.c:4366 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4366
 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+0x63/0xcd

read to 0xffff888103786040 of 8 bytes by task 29 on cpu 0:
 ps2_do_sendbyte+0x1ae/0x380 drivers/input/serio/libps2.c:46
 __ps2_command+0x35e/0x8c0 drivers/input/serio/libps2.c:274
 ps2_command+0x51/0x90 drivers/input/serio/libps2.c:335
 atkbd_set_repeat_rate drivers/input/keyboard/atkbd.c:585 [inline]
 atkbd_event_work+0x2a8/0x2e0 drivers/input/keyboard/atkbd.c:639
 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 arch/x86/entry/entry_64.S:306

value changed: 0x0000000000000001 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29 Comm: kworker/0:1 Not tainted 6.1.0-rc7-syzkaller-00101-g01f856ae6d0c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events atkbd_event_work
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SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65380 sclass=netlink_route_socket pid=29 comm=kworker/0:1