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BUG: KCSAN: data-race in ps2_do_sendbyte / ps2_handle_ack

read-write to 0xffff88810393a040 of 8 bytes by interrupt on cpu 0:
 ps2_handle_ack+0x147/0x340 drivers/input/serio/libps2.c:439
 atkbd_interrupt+0xbe2/0xcc0 drivers/input/keyboard/atkbd.c:434
 serio_interrupt+0x5d/0xe0 drivers/input/serio/serio.c:1002
 i8042_interrupt+0x39e/0x720 drivers/input/serio/i8042.c:602
 __handle_irq_event_percpu+0x93/0x450 kernel/irq/handle.c:156
 handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
 handle_irq_event+0x81/0x120 kernel/irq/handle.c:213
 handle_edge_irq+0x16e/0x590 kernel/irq/chip.c:819
 asm_call_irq_on_stack+0xf/0x20
 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline]
 run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline]
 handle_irq arch/x86/kernel/irq.c:230 [inline]
 __common_interrupt arch/x86/kernel/irq.c:249 [inline]
 common_interrupt+0x8e/0x130 arch/x86/kernel/irq.c:239
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:619
 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
 arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0x32/0x50 kernel/locking/spinlock.c:191
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 _extract_crng+0x29b/0x2b0 drivers/char/random.c:1013
 extract_crng drivers/char/random.c:1026 [inline]
 _get_random_bytes+0x141/0x240 drivers/char/random.c:1562
 get_random_bytes+0x65/0x110 drivers/char/random.c:1575
 eth_random_addr include/linux/etherdevice.h:225 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:521 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:570 [inline]
 nsim_dev_trap_report_work+0x23d/0x5b0 drivers/net/netdevsim/dev.c:611
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff88810393a040 of 8 bytes by task 9146 on cpu 1:
 ps2_do_sendbyte+0x1a1/0x370 drivers/input/serio/libps2.c:45
 __ps2_command+0x298/0x990 drivers/input/serio/libps2.c:265
 ps2_command+0x51/0x90 drivers/input/serio/libps2.c:332
 atkbd_set_leds+0xa0/0x1a0 drivers/input/keyboard/atkbd.c:606
 atkbd_event_work+0xb9/0x300 drivers/input/keyboard/atkbd.c:646
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x635/0xb90 kernel/workqueue.c:2421
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9146 Comm: kworker/1:3 Not tainted 5.11.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events atkbd_event_work
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