================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff86c09a00 of 8 bytes by interrupt on cpu 1: tick_do_update_jiffies64+0x113/0x1c0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:253 [inline] tick_nohz_handler+0x8d/0x3d0 kernel/time/tick-sched.c:312 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x218/0x4f0 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x269/0x810 kernel/time/hrtimer.c:1911 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1f0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 clear_pages arch/x86/include/asm/page_64.h:103 [inline] clear_page arch/x86/include/asm/page_64.h:114 [inline] clear_highpage_kasan_tagged include/linux/highmem.h:344 [inline] kernel_init_pages mm/page_alloc.c:1265 [inline] post_alloc_hook mm/page_alloc.c:1887 [inline] prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x18a5/0x1aa0 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x161/0x360 mm/page_alloc.c:5250 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2490 folio_alloc_mpol_noprof mm/mempolicy.c:2509 [inline] vma_alloc_folio_noprof+0x1a9/0x2f0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:-1 [inline] alloc_anon_folio mm/memory.c:5209 [inline] do_anonymous_page mm/memory.c:5266 [inline] do_pte_missing mm/memory.c:4475 [inline] handle_pte_fault mm/memory.c:6317 [inline] __handle_mm_fault mm/memory.c:6455 [inline] handle_mm_fault+0x1129/0x3020 mm/memory.c:6624 do_user_addr_fault+0x62f/0x1050 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 read to 0xffffffff86c09a00 of 8 bytes by task 30990 on cpu 0: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:638 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x6a0 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x538/0x880 mm/shrinker.c:628 shrink_node_memcgs mm/vmscan.c:6022 [inline] shrink_node+0x6bc/0x2130 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x1f5/0x470 mm/vmscan.c:6683 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2414 try_charge mm/memcontrol.c:2556 [inline] charge_memcg mm/memcontrol.c:4744 [inline] __mem_cgroup_charge+0x65/0x150 mm/memcontrol.c:4761 mem_cgroup_charge include/linux/memcontrol.h:664 [inline] filemap_add_folio+0x110/0x350 mm/filemap.c:959 __filemap_get_folio_mpol+0x326/0x680 mm/filemap.c:2021 __filemap_get_folio include/linux/pagemap.h:763 [inline] filemap_fault+0x486/0xb90 mm/filemap.c:3564 __do_fault+0xbc/0x200 mm/memory.c:5364 do_read_fault mm/memory.c:5799 [inline] do_fault mm/memory.c:5933 [inline] do_pte_missing mm/memory.c:4477 [inline] handle_pte_fault mm/memory.c:6317 [inline] __handle_mm_fault mm/memory.c:6455 [inline] handle_mm_fault+0x11e2/0x3020 mm/memory.c:6624 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x1023/0x1ea0 mm/gup.c:1428 __get_user_pages_locked mm/gup.c:1692 [inline] get_dump_page+0xb4/0x240 mm/gup.c:2192 dump_user_range+0x148/0xdb0 fs/coredump.c:1367 elf_core_dump+0x21a2/0x2330 fs/binfmt_elf.c:2110 coredump_write+0xacc/0xdd0 fs/coredump.c:1050 do_coredump fs/coredump.c:1127 [inline] vfs_coredump+0x26c7/0x3130 fs/coredump.c:1201 get_signal+0xd80/0xf60 kernel/signal.c:3019 arch_do_signal_or_restart+0x96/0x450 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0xf7/0x520 kernel/entry/common.c:219 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 value changed: 0x000000010000b0ad -> 0x000000010000b0ae Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 30990 Comm: syz.1.7551 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================