================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff86c07a00 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:1930 [inline] __hrtimer_run_queues+0x276/0x4f0 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x261/0x850 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x5f/0x1c0 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 kcsan_setup_watchpoint+0x404/0x410 kernel/kcsan/core.c:705 should_skip_vma+0x1f/0x250 mm/vmscan.c:3296 get_next_vma mm/vmscan.c:3353 [inline] walk_pmd_range mm/vmscan.c:3711 [inline] walk_pud_range+0x1369/0x16d0 mm/vmscan.c:3736 walk_p4d_range mm/pagewalk.c:275 [inline] walk_pgd_range+0x58d/0x1520 mm/pagewalk.c:321 __walk_page_range+0xdd/0x340 mm/pagewalk.c:429 walk_page_range_mm_unsafe+0x3e4/0x530 mm/pagewalk.c:525 walk_page_range+0x56/0x70 mm/pagewalk.c:604 walk_mm mm/vmscan.c:3780 [inline] try_to_inc_max_seq+0x766/0xa30 mm/vmscan.c:4046 get_nr_to_scan mm/vmscan.c:4966 [inline] try_to_shrink_lruvec+0xba5/0xc20 mm/vmscan.c:5005 lru_gen_shrink_lruvec mm/vmscan.c:5173 [inline] shrink_lruvec+0x256/0x1bc0 mm/vmscan.c:5932 shrink_node_memcgs mm/vmscan.c:6171 [inline] shrink_node+0x697/0x20a0 mm/vmscan.c:6215 shrink_zones mm/vmscan.c:6454 [inline] do_try_to_free_pages+0x408/0xc90 mm/vmscan.c:6516 try_to_free_mem_cgroup_pages+0x201/0x420 mm/vmscan.c:6838 try_charge_memcg+0x373/0xa10 mm/memcontrol.c:2618 charge_memcg+0x6d/0x120 mm/memcontrol.c:5006 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5092 __swap_cache_prepare_and_add+0x69/0x4a0 mm/swap_state.c:476 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:552 swap_cluster_readahead+0x25f/0x3c0 mm/swap_state.c:726 swapin_readahead+0xde/0x840 mm/swap_state.c:901 do_swap_page+0x31e/0x2180 mm/memory.c:4875 handle_pte_fault mm/memory.c:6414 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0xb2e/0x2e70 mm/memory.c:6718 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 0xffffffff86c07a00 of 8 bytes by task 16894 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x50 mm/memcontrol.c:743 count_shadow_nodes+0x6a/0x250 mm/workingset.c:692 do_shrink_slab+0x63/0x660 mm/shrinker.c:382 shrink_slab_memcg mm/shrinker.c:553 [inline] shrink_slab+0x545/0x8f0 mm/shrinker.c:631 shrink_node_memcgs mm/vmscan.c:6173 [inline] shrink_node+0x6d4/0x20a0 mm/vmscan.c:6215 shrink_zones mm/vmscan.c:6454 [inline] do_try_to_free_pages+0x408/0xc90 mm/vmscan.c:6516 try_to_free_mem_cgroup_pages+0x201/0x420 mm/vmscan.c:6838 try_charge_memcg+0x373/0xa10 mm/memcontrol.c:2618 charge_memcg+0x6d/0x120 mm/memcontrol.c:5006 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5092 __swap_cache_prepare_and_add+0x69/0x4a0 mm/swap_state.c:476 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:552 swap_cluster_readahead+0x25f/0x3c0 mm/swap_state.c:726 swapin_readahead+0xde/0x840 mm/swap_state.c:901 do_swap_page+0x31e/0x2180 mm/memory.c:4875 handle_pte_fault mm/memory.c:6414 [inline] __handle_mm_fault mm/memory.c:6549 [inline] handle_mm_fault+0xb2e/0x2e70 mm/memory.c:6718 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: 0x00000001000051c5 -> 0x00000001000051c6 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 16894 Comm: syz.3.3773 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ==================================================================