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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

read-write to 0xffff888237c1fd14 of 4 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x72/0x4a0 kernel/time/hrtimer.c:1905
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 __list_del_entry_valid_or_report+0x70/0x130 lib/list_debug.c:65
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 __rmqueue_pcplist+0xf7e/0x1110 mm/page_alloc.c:3014
 rmqueue_pcplist mm/page_alloc.c:3046 [inline]
 rmqueue mm/page_alloc.c:3077 [inline]
 get_page_from_freelist+0x3f9/0x1b30 mm/page_alloc.c:3474
 __alloc_frozen_pages_noprof+0x194/0x340 mm/page_alloc.c:4739
 alloc_pages_mpol+0xb4/0x260 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof+0x36/0x80 mm/mempolicy.c:2289
 shmem_alloc_folio mm/shmem.c:1863 [inline]
 shmem_alloc_and_add_folio mm/shmem.c:1902 [inline]
 shmem_get_folio_gfp+0x3d1/0xd90 mm/shmem.c:2522
 shmem_fault+0xfa/0x250 mm/shmem.c:2723
 __do_fault+0xb6/0x200 mm/memory.c:4988
 do_read_fault mm/memory.c:5403 [inline]
 do_fault mm/memory.c:5537 [inline]
 do_pte_missing mm/memory.c:4058 [inline]
 handle_pte_fault mm/memory.c:5900 [inline]
 __handle_mm_fault mm/memory.c:6043 [inline]
 handle_mm_fault+0xe98/0x2ac0 mm/memory.c:6212
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0xf6a/0x2350 mm/gup.c:1491
 populate_vma_page_range mm/gup.c:1929 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2032
 mm_populate include/linux/mm.h:3386 [inline]
 vm_mmap_pgoff+0x224/0x2d0 mm/util.c:580
 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:607
 x64_sys_call+0x1940/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:10
 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

read to 0xffff888237c1fd14 of 4 bytes by task 2219 on cpu 1:
 print_cpu+0x348/0x670 kernel/time/timer_list.c:135
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:295
 seq_read_iter+0x655/0x930 fs/seq_file.c:272
 proc_reg_read_iter+0x118/0x190 fs/proc/inode.c:299
 copy_splice_read+0x383/0x5b0 fs/splice.c:365
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x269/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x398/0x660 fs/read_write.c:1363
 __do_sys_sendfile64 fs/read_write.c:1424 [inline]
 __se_sys_sendfile64 fs/read_write.c:1410 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410
 x64_sys_call+0xfbd/0x2dc0 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: 0x00100e65 -> 0x00100e66

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2219 Comm: syz.7.8705 Tainted: G        W          6.14.0-rc4-syzkaller-00295-gb91872c56940 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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