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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff88812c01fcd0 of 1 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x24c/0x490 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 tomoyo_update_domain+0x236/0x440 security/tomoyo/domain.c:123
 tomoyo_update_path_number_acl security/tomoyo/file.c:691 [inline]
 tomoyo_write_file+0x4c7/0x540 security/tomoyo/file.c:1034
 tomoyo_write_domain2+0xab/0x120 security/tomoyo/common.c:1152
 tomoyo_add_entry security/tomoyo/common.c:2042 [inline]
 tomoyo_supervisor+0xa85/0xc90 security/tomoyo/common.c:2103
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x2d7/0x360 security/tomoyo/file.c:734
 tomoyo_file_ioctl+0x28/0x40 security/tomoyo/tomoyo.c:335
 security_file_ioctl+0x69/0xa0 security/security.c:1441
 ksys_ioctl+0x5a/0x150 fs/ioctl.c:757
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x47/0x60 fs/ioctl.c:770
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812c01fcd0 of 1 bytes by task 9074 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+0x346/0x9d0 fs/seq_file.c:229
 proc_reg_read+0xe8/0x140 fs/proc/inode.c:223
 do_loop_readv_writev fs/read_write.c:714 [inline]
 do_loop_readv_writev fs/read_write.c:701 [inline]
 do_iter_read+0x33d/0x3a0 fs/read_write.c:935
 vfs_readv+0x9c/0xf0 fs/read_write.c:1053
 kernel_readv fs/splice.c:365 [inline]
 default_file_splice_read+0x361/0x590 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+0x396/0x810 fs/read_write.c:1520
 __do_sys_sendfile64 fs/read_write.c:1581 [inline]
 __se_sys_sendfile64 fs/read_write.c:1567 [inline]
 __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1567
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9074 Comm: syz-executor.5 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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