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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 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:1785 [inline]
 __hrtimer_run_queues+0x218/0x4f0 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/0x1f0 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
 chacha_permute+0x285/0x520 lib/crypto/chacha-block-generic.c:35
 chacha_block_generic+0x45/0x240 lib/crypto/chacha-block-generic.c:83
 chacha20_block include/crypto/chacha.h:45 [inline]
 get_random_bytes_user+0xf3/0x2b0 drivers/char/random.c:461
 __do_sys_getrandom drivers/char/random.c:1410 [inline]
 __se_sys_getrandom drivers/char/random.c:1384 [inline]
 __x64_sys_getrandom+0xcf/0x1a0 drivers/char/random.c:1384
 x64_sys_call+0x2a28/0x3020 arch/x86/include/generated/asm/syscalls_64.h:319
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff86c09a00 of 8 bytes by task 28023 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:638
 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678
 do_shrink_slab+0x63/0x6a0 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x538/0x880 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:6022 [inline]
 shrink_node+0x6bc/0x2130 mm/vmscan.c:6061
 shrink_zones mm/vmscan.c:6300 [inline]
 do_try_to_free_pages+0x408/0xc80 mm/vmscan.c:6362
 try_to_free_mem_cgroup_pages+0x1f5/0x470 mm/vmscan.c:6683
 try_charge_memcg+0x37e/0xa10 mm/memcontrol.c:2414
 try_charge mm/memcontrol.c:2556 [inline]
 charge_memcg mm/memcontrol.c:4744 [inline]
 mem_cgroup_swapin_charge_folio+0x103/0x1f0 mm/memcontrol.c:4830
 __swap_cache_prepare_and_add+0x386/0x530 mm/swap_state.c:517
 swap_cache_alloc_folio+0xa2/0x120 mm/swap_state.c:575
 swap_cluster_readahead+0x26e/0x3d0 mm/swap_state.c:749
 swapin_readahead+0xde/0x840 mm/swap_state.c:924
 do_swap_page+0x30d/0x2220 mm/memory.c:4802
 handle_pte_fault mm/memory.c:6320 [inline]
 __handle_mm_fault mm/memory.c:6455 [inline]
 handle_mm_fault+0xb46/0x3020 mm/memory.c:6624
 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: 0x000000010000e33f -> 0x000000010000e340

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 28023 Comm: syz.4.7002 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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