================================================================== 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 0: 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+0x207/0x4c0 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/0x1d0 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 should_run_aging mm/vmscan.c:4787 [inline] get_nr_to_scan mm/vmscan.c:4811 [inline] try_to_shrink_lruvec+0x33d/0x980 mm/vmscan.c:4867 shrink_one+0x150/0x3f0 mm/vmscan.c:4916 shrink_many mm/vmscan.c:4979 [inline] lru_gen_shrink_node mm/vmscan.c:5057 [inline] shrink_node+0x194a/0x20c0 mm/vmscan.c:6037 shrink_zones mm/vmscan.c:6290 [inline] do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6352 try_to_free_pages+0x36d/0x870 mm/vmscan.c:6591 __perform_reclaim mm/page_alloc.c:4418 [inline] __alloc_pages_direct_reclaim+0x4e/0xd0 mm/page_alloc.c:4440 __alloc_pages_slowpath+0x2a4/0x600 mm/page_alloc.c:4840 __alloc_frozen_pages_noprof+0x270/0x350 mm/page_alloc.c:5257 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2485 alloc_frozen_pages_noprof mm/mempolicy.c:2556 [inline] alloc_pages_noprof mm/mempolicy.c:2576 [inline] folio_alloc_noprof+0x96/0x150 mm/mempolicy.c:2586 filemap_alloc_folio_noprof+0x92/0x220 mm/filemap.c:1013 __filemap_get_folio_mpol+0x295/0x680 mm/filemap.c:2006 __filemap_get_folio include/linux/pagemap.h:774 [inline] filemap_fault+0x47c/0xb90 mm/filemap.c:3559 __do_fault+0xbc/0x200 mm/memory.c:5355 do_read_fault mm/memory.c:5790 [inline] do_fault mm/memory.c:5924 [inline] do_pte_missing mm/memory.c:4469 [inline] handle_pte_fault mm/memory.c:6308 [inline] __handle_mm_fault mm/memory.c:6446 [inline] handle_mm_fault+0x11d7/0x3020 mm/memory.c:6615 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 11508 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:638 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678 do_shrink_slab+0x63/0x670 mm/shrinker.c:384 shrink_slab_memcg mm/shrinker.c:550 [inline] shrink_slab+0x538/0x880 mm/shrinker.c:628 shrink_one+0x193/0x3f0 mm/vmscan.c:4918 shrink_many mm/vmscan.c:4979 [inline] lru_gen_shrink_node mm/vmscan.c:5057 [inline] shrink_node+0x194a/0x20c0 mm/vmscan.c:6037 shrink_zones mm/vmscan.c:6290 [inline] do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6352 try_to_free_pages+0x36d/0x870 mm/vmscan.c:6591 __perform_reclaim mm/page_alloc.c:4418 [inline] __alloc_pages_direct_reclaim+0x4e/0xd0 mm/page_alloc.c:4440 __alloc_pages_slowpath+0x2a4/0x600 mm/page_alloc.c:4840 __alloc_frozen_pages_noprof+0x270/0x350 mm/page_alloc.c:5257 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2485 alloc_frozen_pages_noprof mm/mempolicy.c:2556 [inline] alloc_pages_noprof mm/mempolicy.c:2576 [inline] folio_alloc_noprof+0x96/0x150 mm/mempolicy.c:2586 filemap_alloc_folio_noprof+0x92/0x220 mm/filemap.c:1013 __filemap_get_folio_mpol+0x295/0x680 mm/filemap.c:2006 __filemap_get_folio include/linux/pagemap.h:774 [inline] filemap_fault+0x47c/0xb90 mm/filemap.c:3559 __do_fault+0xbc/0x200 mm/memory.c:5355 do_read_fault mm/memory.c:5790 [inline] do_fault mm/memory.c:5924 [inline] do_pte_missing mm/memory.c:4469 [inline] handle_pte_fault mm/memory.c:6308 [inline] __handle_mm_fault mm/memory.c:6446 [inline] handle_mm_fault+0x11d7/0x3020 mm/memory.c:6615 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 value changed: 0x00000000ffffe4e9 -> 0x00000000ffffe4ea Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 11508 Comm: syz.7.2075 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 ==================================================================