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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff88812c01fd90 of 1 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x24c/0x490 kernel/time/hrtimer.c:1655
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0x4d/0x80 kernel/locking/spinlock.c:191
 unlock_hrtimer_base kernel/time/hrtimer.c:898 [inline]
 hrtimer_start_range_ns+0x467/0x680 kernel/time/hrtimer.c:1136
 hrtimer_start_expires include/linux/hrtimer.h:435 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1800 [inline]
 do_nanosleep+0xfa/0x320 kernel/time/hrtimer.c:1876
 hrtimer_nanosleep+0x136/0x230 kernel/time/hrtimer.c:1932
 __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline]
 __x64_sys_nanosleep+0x14b/0x190 kernel/time/hrtimer.c:1953
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812c01fd90 of 1 bytes by task 11039 on cpu 1:
 print_cpu+0x24f/0x670 kernel/time/timer_list.c:149
 timer_list_show+0xb5/0x140 kernel/time/timer_list.c:311
 seq_read+0x6ed/0x940 fs/seq_file.c:247
 pde_read fs/proc/inode.c:292 [inline]
 proc_reg_read+0x17f/0x1b0 fs/proc/inode.c:304
 do_loop_readv_writev fs/read_write.c:715 [inline]
 do_loop_readv_writev fs/read_write.c:702 [inline]
 do_iter_read+0x33f/0x3a0 fs/read_write.c:936
 vfs_readv+0x9c/0xf0 fs/read_write.c:1054
 kernel_readv fs/splice.c:365 [inline]
 default_file_splice_read+0x361/0x630 fs/splice.c:422
 do_splice_to+0xc7/0x100 fs/splice.c:892
 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971
 do_splice_direct+0x152/0x1d0 fs/splice.c:1080
 do_sendfile+0x380/0x800 fs/read_write.c:1521
 __do_sys_sendfile64 fs/read_write.c:1582 [inline]
 __se_sys_sendfile64 fs/read_write.c:1568 [inline]
 __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1568
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11039 Comm: syz-executor.3 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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