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BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64

read-write to 0xffffffff86809a00 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:1777 [inline]
 __hrtimer_run_queues+0x20f/0x5a0 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1903
 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
 percpu_ref_tryget_many include/linux/percpu-refcount.h:244 [inline]
 percpu_ref_tryget include/linux/percpu-refcount.h:266 [inline]
 css_tryget include/linux/cgroup_refcnt.h:45 [inline]
 get_mem_cgroup_from_objcg include/linux/memcontrol.h:520 [inline]
 obj_cgroup_uncharge_pages+0x88/0x150 mm/memcontrol.c:2797
 __memcg_kmem_uncharge_page+0x3d/0xc0 mm/memcontrol.c:2890
 free_pages_prepare mm/page_alloc.c:1320 [inline]
 __free_frozen_pages+0xda/0x510 mm/page_alloc.c:2943
 vfree+0x20e/0x3a0 mm/vmalloc.c:3466
 cleanup_vm_area_work+0x55/0xb0 mm/vmalloc.c:3763
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340
 worker_thread+0x582/0x770 kernel/workqueue.c:3421
 kthread+0x489/0x510 kernel/kthread.c:463
 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

read to 0xffffffff86809a00 of 8 bytes by task 7949 on cpu 1:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:636
 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678
 do_shrink_slab+0x63/0x680 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x4f5/0x840 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:6020 [inline]
 shrink_node+0x6a9/0x2010 mm/vmscan.c:6059
 shrink_zones mm/vmscan.c:6298 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6360
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6688
 try_charge_memcg+0x383/0xa10 mm/memcontrol.c:2388
 try_charge mm/memcontrol.c:2530 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4728
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4814
 __read_swap_cache_async+0x17b/0x2d0 mm/swap_state.c:481
 swap_cluster_readahead+0x262/0x3c0 mm/swap_state.c:646
 swapin_readahead+0xde/0x820 mm/swap_state.c:821
 do_swap_page+0x2b4/0x21e0 mm/memory.c:4753
 handle_pte_fault mm/memory.c:6276 [inline]
 __handle_mm_fault mm/memory.c:6411 [inline]
 handle_mm_fault+0x9d8/0x2c60 mm/memory.c:6580
 do_user_addr_fault+0x3fe/0x1080 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
 __get_user_8+0x14/0x30 arch/x86/lib/getuser.S:100
 fetch_robust_entry kernel/futex/core.c:1139 [inline]
 exit_robust_list+0x31/0x280 kernel/futex/core.c:1167
 futex_cleanup kernel/futex/core.c:1411 [inline]
 futex_exit_release+0xe0/0x130 kernel/futex/core.c:1512
 exit_mm_release+0x1a/0x30 kernel/fork.c:1493
 exit_mm+0x38/0x180 kernel/exit.c:554
 do_exit+0x427/0x15d0 kernel/exit.c:959
 do_group_exit+0xff/0x140 kernel/exit.c:1112
 get_signal+0xe58/0xf70 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x450 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x6a/0x740 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x202/0x2a0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffffcbed -> 0x00000000ffffcbee

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 7949 Comm: syz.3.1296 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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