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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff888237c1ffa0 of 8 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x18c/0x7b0 kernel/time/hrtimer.c:1805
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 folio_memcg_kmem include/linux/memcontrol.h:556 [inline]
 folio_memcg include/linux/memcontrol.h:441 [inline]
 folio_lruvec include/linux/memcontrol.h:772 [inline]
 folio_lruvec_lock_irqsave+0x20/0x110 mm/memcontrol.c:1579
 folio_lruvec_relock_irqsave include/linux/memcontrol.h:1672 [inline]
 folio_batch_move_lru+0x1fb/0x2c0 mm/swap.c:219
 lru_add_drain_cpu+0x77/0x260 mm/swap.c:657
 lru_add_drain mm/swap.c:757 [inline]
 __folio_batch_release+0x51/0xc0 mm/swap.c:1081
 folio_batch_release include/linux/pagevec.h:101 [inline]
 writeback_get_folio mm/page-writeback.c:2438 [inline]
 writeback_iter+0x41d/0x830 mm/page-writeback.c:2541
 write_cache_pages+0xad/0x100 mm/page-writeback.c:2590
 blkdev_writepages+0x59/0x90 block/fops.c:424
 do_writepages+0x1d8/0x480 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc+0xdb/0x100 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 __filemap_fdatawrite mm/filemap.c:436 [inline]
 filemap_flush+0x61/0x90 mm/filemap.c:463
 sync_blockdev_nowait+0x29/0x40 block/bdev.c:206
 sync_filesystem+0xe3/0x190 fs/sync.c:60
 generic_shutdown_super+0x42/0x210 fs/super.c:621
 kill_block_super+0x2a/0x70 fs/super.c:1676
 deactivate_locked_super+0x7d/0x1c0 fs/super.c:473
 deactivate_super+0x9f/0xb0 fs/super.c:506
 cleanup_mnt+0x268/0x2e0 fs/namespace.c:1267
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1274
 task_work_run+0x13a/0x1a0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xbe/0x130 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237c1ffa0 of 8 bytes by task 11689 on cpu 1:
 print_cpu+0x2fb/0x670 kernel/time/timer_list.c:133
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:295
 seq_read_iter+0x65b/0x940 fs/seq_file.c:272
 proc_reg_read_iter+0x11e/0x190 fs/proc/inode.c:299
 copy_splice_read+0x3a4/0x5d0 fs/splice.c:365
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x26c/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x3ab/0x960 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
 x64_sys_call+0x2c9f/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x000000287ccd2e58 -> 0x000000287d3f6b00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11689 Comm: syz-executor.1 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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