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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

write to 0xffff888103abc840 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
 arch_atomic64_sub include/linux/rcupdate.h:726 [inline]
 atomic64_sub include/linux/atomic/atomic-instrumented.h:743 [inline]
 ext4_mb_mark_diskspace_used+0x607/0x710 fs/ext4/mballoc.c:3874
 ext4_mb_new_blocks+0x6f5/0xae0 fs/ext4/mballoc.c:5634
 ext4_ext_map_blocks+0x9e2/0x1560 fs/ext4/extents.c:4281
 ext4_map_blocks+0x57e/0xbb0 fs/ext4/inode.c:636
 ext4_getblk+0xa4/0x360 fs/ext4/inode.c:847
 ext4_bread+0x28/0xf0 fs/ext4/inode.c:900
 ext4_append+0x89/0x140 fs/ext4/namei.c:67
 ext4_init_new_dir+0x12a/0x390 fs/ext4/namei.c:2893
 ext4_mkdir+0x241/0x5e0 fs/ext4/namei.c:2939
 vfs_mkdir+0x216/0x320 fs/namei.c:3931
 do_mkdirat+0x105/0x280 fs/namei.c:3957
 __do_sys_mkdirat fs/namei.c:3972 [inline]
 __se_sys_mkdirat fs/namei.c:3970 [inline]
 __x64_sys_mkdirat+0x4c/0x60 fs/namei.c:3970
 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+0x44/0xae

read to 0xffff888103abc840 of 8 bytes by task 1934 on cpu 0:
 ps2_do_sendbyte+0x1ae/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: 1934 Comm: kworker/0:8 Not tainted 5.18.0-rc3-syzkaller-00190-gc00c5e1d157b-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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