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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff88812c01fd94 of 4 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x9a/0x490 kernel/time/hrtimer.c:1624
 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_atomic_set arch/x86/include/asm/atomic.h:43 [inline]
 atomic_set include/asm-generic/atomic-instrumented.h:46 [inline]
 osq_lock_init include/linux/osq_lock.h:30 [inline]
 __mutex_init+0x8c/0xd0 kernel/locking/mutex.c:46
 __alloc_file+0x12d/0x200 fs/file_table.c:115
 alloc_empty_file+0xb0/0x1d0 fs/file_table.c:151
 path_openat+0x74/0x23d0 fs/namei.c:3332
 do_filp_open+0x11e/0x1b0 fs/namei.c:3373
 do_sys_openat2+0x52e/0x680 fs/open.c:1148
 do_sys_open+0xa2/0x110 fs/open.c:1164
 ksys_open include/linux/syscalls.h:1386 [inline]
 __do_sys_open fs/open.c:1170 [inline]
 __se_sys_open fs/open.c:1168 [inline]
 __x64_sys_open+0x50/0x60 fs/open.c:1168
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812c01fd94 of 4 bytes by task 980 on cpu 1:
 print_cpu+0x275/0x670 kernel/time/timer_list.c:150
 timer_list_show+0xb5/0x140 kernel/time/timer_list.c:311
 seq_read+0x2ef/0x940 fs/seq_file.c:206
 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: 980 Comm: syz-executor.1 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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