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BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer

write to 0xffffffff86fc1910 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer kernel/time/tick-sched.c:141 [inline]
 tick_sched_timer+0x1f5/0x210 kernel/time/tick-sched.c:1321
 __run_hrtimer+0x133/0x420 kernel/time/hrtimer.c:1519
 __hrtimer_run_queues kernel/time/hrtimer.c:1583 [inline]
 hrtimer_interrupt+0x36e/0xa10 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x6f/0x200 arch/x86/kernel/apic/apic.c:1097
 asm_call_irq_on_stack+0xf/0x20
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
 arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
 rmqueue_pcplist+0x161/0x190 mm/page_alloc.c:3413
 rmqueue+0x100c/0x11d0 mm/page_alloc.c:3436
 get_page_from_freelist+0x236/0x480 mm/page_alloc.c:3901
 __alloc_pages_nodemask+0x19e/0x350 mm/page_alloc.c:4946
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2271
 alloc_pages include/linux/gfp.h:547 [inline]
 __page_cache_alloc+0x4d/0xf0 mm/filemap.c:977
 page_cache_ra_unbounded+0x1ae/0x4c0 mm/readahead.c:216
 ondemand_readahead+0x560/0x780 mm/readahead.c:267
 page_cache_async_ra+0x1aa/0x1d0 mm/readahead.c:607
 page_cache_async_readahead include/linux/pagemap.h:862 [inline]
 generic_file_buffered_read+0x450/0x23a0 mm/filemap.c:2247
 generic_file_read_iter+0x80/0x3d0 mm/filemap.c:2553
 ext4_file_read_iter+0x2d0/0x420 fs/ext4/file.c:74
 __kernel_read+0x307/0x560 fs/read_write.c:454
 integrity_kernel_read+0x4c/0x70 security/integrity/iint.c:191
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:484 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:515 [inline]
 ima_calc_file_hash+0x9c7/0x1430 security/integrity/ima/ima_crypto.c:580
 ima_collect_measurement+0x168/0x300 security/integrity/ima/ima_api.c:250
 process_measurement+0x9f1/0x1050 security/integrity/ima/ima_main.c:330
 ima_file_check+0x72/0xa0 security/integrity/ima/ima_main.c:498
 do_open fs/namei.c:3254 [inline]
 path_openat+0x1887/0x20a0 fs/namei.c:3369
 do_filp_open+0xbd/0x1d0 fs/namei.c:3396
 do_sys_openat2+0xa3/0x240 fs/open.c:1168
 do_sys_open fs/open.c:1184 [inline]
 __do_sys_openat fs/open.c:1200 [inline]
 __se_sys_openat fs/open.c:1195 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1195
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff86fc1910 of 4 bytes by task 0 on cpu 1:
 tick_nohz_next_event+0x217/0x300 kernel/time/tick-sched.c:754
 tick_nohz_get_sleep_length+0x121/0x270 kernel/time/tick-sched.c:1107
 menu_select+0x2fa/0xf40 drivers/cpuidle/governors/menu.c:283
 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:322
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x15f/0x230 kernel/sched/idle.c:299
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:395
 secondary_startup_64_no_verify+0xb0/0xbb

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.10.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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