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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

write to 0xffff8881037c5840 of 8 bytes by interrupt on cpu 1:
 ps2_handle_ack+0x15a/0x350 drivers/input/serio/libps2.c:439
 atkbd_interrupt+0xbf7/0xcd0 drivers/input/keyboard/atkbd.c:434
 serio_interrupt+0x5d/0xe0 drivers/input/serio/serio.c:1001
 i8042_interrupt+0x39e/0x720 drivers/input/serio/i8042.c:606
 __handle_irq_event_percpu+0x92/0x450 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0x7b/0x110 kernel/irq/handle.c:210
 handle_edge_irq+0x18e/0x5f0 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
 arch_atomic_add_return include/linux/rwlock_api_smp.h:149 [inline]
 atomic_add_return_acquire include/linux/atomic/atomic-instrumented.h:72 [inline]
 queued_read_lock include/asm-generic/qrwlock.h:78 [inline]
 __raw_read_lock include/linux/rwlock_api_smp.h:151 [inline]
 _raw_read_lock+0x17/0x30 kernel/locking/spinlock.c:228
 ext4_es_lookup_extent+0x5b/0x390 fs/ext4/extents_status.c:933
 ext4_map_blocks+0xd9/0xb90 fs/ext4/inode.c:528
 ext4_getblk+0xa4/0x340 fs/ext4/inode.c:847
 ext4_bread+0x28/0xf0 fs/ext4/inode.c:900
 __ext4_read_dirblock+0x2f/0x6e0 fs/ext4/namei.c:116
 htree_dirblock_to_tree+0xcb/0x4d0 fs/ext4/namei.c:1028
 ext4_htree_fill_tree+0x3cb/0x820 fs/ext4/namei.c:1160
 ext4_dx_readdir fs/ext4/dir.c:597 [inline]
 ext4_readdir+0x1106/0x1610 fs/ext4/dir.c:142
 iterate_dir+0x174/0x3c0 fs/readdir.c:65
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x8e/0x1a0 fs/readdir.c:354
 __x64_sys_getdents64+0x3f/0x50 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881037c5840 of 8 bytes by task 1909 on cpu 0:
 ps2_do_sendbyte+0x12e/0x3b0 drivers/input/serio/libps2.c:45
 __ps2_command+0x30d/0xa00 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:595 [inline]
 atkbd_event_work+0x2d4/0x300 drivers/input/keyboard/atkbd.c:649
 process_one_work+0x3e3/0x970 kernel/workqueue.c:2289
 worker_thread+0x638/0xaa0 kernel/workqueue.c:2436
 kthread+0x1bf/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000000001 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1909 Comm: kworker/0:6 Not tainted 5.17.0-syzkaller-11406-gf82da161ea75-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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