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BUG: KCSAN: data-race in add_input_randomness / add_input_randomness

write to 0xffffffff89602974 of 1 bytes by interrupt on cpu 1:
 add_input_randomness+0x66/0x2a0 drivers/char/random.c:1210
 input_handle_event+0x6b7/0xd50 drivers/input/input.c:378
 input_event+0x7d/0xa0 drivers/input/input.c:446
 hidinput_hid_event+0xb4b/0xcd0 drivers/hid/hid-input.c:1403
 hid_process_event+0x2f3/0x3c0 drivers/hid/hid-core.c:1519
 hid_input_field drivers/hid/hid-core.c:1571 [inline]
 hid_report_raw_event+0x8f3/0xbd0 drivers/hid/hid-core.c:1783
 hid_input_report+0x2c9/0x330 drivers/hid/hid-core.c:1850
 hid_irq_in+0x2cb/0x3d0 drivers/hid/usbhid/hid-core.c:284
 __usb_hcd_giveback_urb+0x244/0x2e0 drivers/usb/core/hcd.c:1656
 usb_hcd_giveback_urb+0xae/0x200 drivers/usb/core/hcd.c:1726
 dummy_timer+0x513/0x24a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1417
 expire_timers+0x116/0x260 kernel/time/timer.c:1462
 __run_timers+0x358/0x3f0 kernel/time/timer.c:1731
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1744
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420
 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:516 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:647
 cpuidle_enter_state+0x2b6/0x7c0 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x193/0x230 kernel/sched/idle.c:299
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:396
 secondary_startup_64_no_verify+0xb0/0xbb

read to 0xffffffff89602974 of 1 bytes by interrupt on cpu 0:
 add_input_randomness+0x35/0x2a0 drivers/char/random.c:1207
 input_handle_event+0x6b7/0xd50 drivers/input/input.c:378
 input_event+0x7d/0xa0 drivers/input/input.c:446
 hidinput_hid_event+0xb4b/0xcd0 drivers/hid/hid-input.c:1403
 hid_process_event+0x2f3/0x3c0 drivers/hid/hid-core.c:1519
 hid_input_field drivers/hid/hid-core.c:1571 [inline]
 hid_report_raw_event+0x8f3/0xbd0 drivers/hid/hid-core.c:1783
 hid_input_report+0x2c9/0x330 drivers/hid/hid-core.c:1850
 hid_irq_in+0x2cb/0x3d0 drivers/hid/usbhid/hid-core.c:284
 __usb_hcd_giveback_urb+0x244/0x2e0 drivers/usb/core/hcd.c:1656
 usb_hcd_giveback_urb+0xae/0x200 drivers/usb/core/hcd.c:1726
 dummy_timer+0x513/0x24a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1417
 expire_timers+0x116/0x260 kernel/time/timer.c:1462
 __run_timers+0x358/0x3f0 kernel/time/timer.c:1731
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1744
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420
 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:516 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:647
 cpuidle_enter_state+0x2b6/0x7c0 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x193/0x230 kernel/sched/idle.c:299
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:396
 rest_init+0xd7/0xe0 init/main.c:720
 arch_call_rest_init+0xa/0xb
 start_kernel+0x5a1/0x626 init/main.c:1061
 secondary_startup_64_no_verify+0xb0/0xbb

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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