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BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64

read-write to 0xffffffff868099c0 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:232 [inline]
 tick_nohz_handler+0x7f/0x2d0 kernel/time/tick-sched.c:290
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x20c/0x5a0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x21a/0x460 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705
 mem_cgroup_is_root include/linux/memcontrol.h:528 [inline]
 mem_cgroup_unprotected include/linux/memcontrol.h:597 [inline]
 mem_cgroup_below_low include/linux/memcontrol.h:604 [inline]
 shrink_node_memcgs mm/vmscan.c:5972 [inline]
 shrink_node+0x5f8/0x2110 mm/vmscan.c:6030
 shrink_zones mm/vmscan.c:6274 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6336
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6664
 try_charge_memcg+0x3ab/0x870 mm/memcontrol.c:2304
 try_charge mm/memcontrol.c:2446 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4592
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4678
 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:444
 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:635
 swapin_readahead+0xde/0x6f0 mm/swap_state.c:814
 do_swap_page+0x301/0x2460 mm/memory.c:4532
 handle_pte_fault mm/memory.c:6000 [inline]
 __handle_mm_fault mm/memory.c:6140 [inline]
 handle_mm_fault+0xb60/0x2ae0 mm/memory.c:6309
 do_user_addr_fault+0x3fe/0x1090 arch/x86/mm/fault.c:1388
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x54/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
 __put_user_4+0xd/0x20 arch/x86/lib/putuser.S:92
 mm_release+0x8e/0x1e0 kernel/fork.c:1682
 exit_mm_release+0x25/0x30 kernel/fork.c:1700
 exit_mm+0x38/0x190 kernel/exit.c:562
 do_exit+0x55f/0x17c0 kernel/exit.c:940
 do_group_exit+0xff/0x140 kernel/exit.c:1102
 get_signal+0xe59/0xf70 kernel/signal.c:3034
 arch_do_signal_or_restart+0x97/0x480 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x68/0xb0 kernel/entry/common.c:218
 do_syscall_64+0xdd/0x1a0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff868099c0 of 8 bytes by task 11731 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:643
 count_shadow_nodes+0x6a/0x230 mm/workingset.c:680
 do_shrink_slab+0x63/0x680 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x448/0x760 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:5991 [inline]
 shrink_node+0x6c3/0x2110 mm/vmscan.c:6030
 shrink_zones mm/vmscan.c:6274 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6336
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6664
 try_charge_memcg+0x3ab/0x870 mm/memcontrol.c:2304
 try_charge mm/memcontrol.c:2446 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4592
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4678
 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:444
 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:635
 swapin_readahead+0xde/0x6f0 mm/swap_state.c:814
 do_swap_page+0x301/0x2460 mm/memory.c:4532
 handle_pte_fault mm/memory.c:6000 [inline]
 __handle_mm_fault mm/memory.c:6140 [inline]
 handle_mm_fault+0xb60/0x2ae0 mm/memory.c:6309
 do_user_addr_fault+0x636/0x1090 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x54/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x00000001000058bb -> 0x00000001000058bc

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 11731 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00007-g4a95bc121ccd #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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