================================================================== 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 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: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 console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline] console_flush_all+0x540/0x6c0 kernel/printk/printk.c:3343 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0xa1/0x280 kernel/printk/printk.c:3413 vprintk_emit+0x3e4/0x600 kernel/printk/printk.c:2479 vprintk_default+0x26/0x30 kernel/printk/printk.c:2494 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2504 __oom_kill_process+0x3a8/0x800 mm/oom_kill.c:945 oom_kill_process+0xf4/0x350 mm/oom_kill.c:1042 out_of_memory+0x97d/0xb80 mm/oom_kill.c:1169 mem_cgroup_out_of_memory mm/memcontrol.c:1907 [inline] mem_cgroup_oom mm/memcontrol.c:1930 [inline] try_charge_memcg+0x62f/0xa10 mm/memcontrol.c:2669 obj_cgroup_charge_pages mm/memcontrol.c:3069 [inline] __memcg_kmem_charge_page+0x1ce/0x3d0 mm/memcontrol.c:3113 __alloc_frozen_pages_noprof+0x18a/0x350 mm/page_alloc.c:5243 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0x8f/0x140 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3728 [inline] __vmalloc_area_node mm/vmalloc.c:3878 [inline] __vmalloc_node_range_noprof+0xaed/0x11c0 mm/vmalloc.c:4064 __kvmalloc_node_noprof+0x3d4/0x640 mm/slub.c:6861 futex_hash_allocate+0x190/0x9a0 kernel/futex/core.c:1815 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1961 __do_sys_prctl kernel/sys.c:2885 [inline] __se_sys_prctl+0x4f4/0x1400 kernel/sys.c:2534 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534 x64_sys_call+0x2533/0x3020 arch/x86/include/generated/asm/syscalls_64.h:158 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff86c07a00 of 8 bytes by task 3783 on cpu 0: 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:2627 charge_memcg+0x6d/0x120 mm/memcontrol.c:5015 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5101 __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:4891 handle_pte_fault mm/memory.c:6430 [inline] __handle_mm_fault mm/memory.c:6565 [inline] handle_mm_fault+0xb30/0x2e70 mm/memory.c:6734 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: 0x00000000ffff9c31 -> 0x00000000ffff9c32 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3783 Comm: syz.4.73 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ==================================================================