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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff888237d1b260 of 8 bytes by interrupt on cpu 1:
 hrtimer_interrupt+0x193/0x460 kernel/time/hrtimer.c:1879
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705
 __rmap_walk_file+0x189/0x2b0 mm/rmap.c:2904
 try_to_migrate+0x1db/0x210 mm/rmap.c:-1
 migrate_folio_unmap mm/migrate.c:1261 [inline]
 migrate_pages_batch+0x751/0x17d0 mm/migrate.c:1807
 migrate_pages_sync mm/migrate.c:1930 [inline]
 migrate_pages+0xf5f/0x1770 mm/migrate.c:2039
 do_mbind mm/mempolicy.c:1542 [inline]
 kernel_mbind mm/mempolicy.c:1685 [inline]
 __do_sys_mbind mm/mempolicy.c:1759 [inline]
 __se_sys_mbind+0x975/0xac0 mm/mempolicy.c:1755
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1755
 x64_sys_call+0x14af/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:238
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237d1b260 of 8 bytes by task 7693 on cpu 0:
 print_cpu+0x30b/0x680 kernel/time/timer_list.c:133
 timer_list_show+0x107/0x170 kernel/time/timer_list.c:295
 seq_read_iter+0x316/0x940 fs/seq_file.c:230
 proc_reg_read_iter+0x10d/0x180 fs/proc/inode.c:299
 copy_splice_read+0x3c1/0x5f0 fs/splice.c:363
 do_splice_read fs/splice.c:979 [inline]
 splice_direct_to_actor+0x26c/0x680 fs/splice.c:1083
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0xda/0x150 fs/splice.c:1227
 do_sendfile+0x380/0x650 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __x64_sys_sendfile64+0x105/0x150 fs/read_write.c:1417
 x64_sys_call+0xb39/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000020aa1f8edd -> 0x00000020aa218aad

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 7693 Comm: syz.4.1264 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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