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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+0x88/0x3d0 kernel/time/tick-sched.c:312
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x1f8/0x510 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x257/0x810 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+0x3e8/0x450 kernel/kcsan/core.c:705
 should_failslab+0x35/0xb0 mm/failslab.c:30
 slab_pre_alloc_hook mm/slub.c:4523 [inline]
 slab_alloc_node mm/slub.c:4876 [inline]
 __do_kmalloc_node mm/slub.c:5295 [inline]
 __kmalloc_noprof+0xb8/0x4d0 mm/slub.c:5308
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kmalloc_array_noprof include/linux/slab.h:1097 [inline]
 security_inode_init_security+0xb4/0x320 security/security.c:1347
 shmem_symlink+0xc9/0x3a0 mm/shmem.c:4097
 vfs_symlink+0xfd/0x220 fs/namei.c:5656
 filename_symlinkat+0xe8/0x2b0 fs/namei.c:5681
 __do_sys_symlink fs/namei.c:5708 [inline]
 __se_sys_symlink+0x42/0x1b0 fs/namei.c:5704
 __x64_sys_symlink+0x31/0x40 fs/namei.c:5704
 x64_sys_call+0x2465/0x3020 arch/x86/include/generated/asm/syscalls_64.h:89
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff86c07a00 of 8 bytes by task 10354 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+0x61/0x650 mm/shrinker.c:382
 shrink_slab_memcg mm/shrinker.c:553 [inline]
 shrink_slab+0x53b/0x8e0 mm/shrinker.c:631
 shrink_node_memcgs mm/vmscan.c:6173 [inline]
 shrink_node+0x6d4/0x2080 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+0x375/0xa00 mm/memcontrol.c:2630
 charge_memcg+0x6d/0x120 mm/memcontrol.c:5024
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:5110
 __swap_cache_prepare_and_add+0x69/0x490 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+0x34d/0x2150 mm/memory.c:4891
 handle_pte_fault mm/memory.c:6430 [inline]
 __handle_mm_fault mm/memory.c:6565 [inline]
 handle_mm_fault+0xb3c/0x2da0 mm/memory.c:6734
 do_user_addr_fault+0x634/0x1060 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: 0x00000000ffffb957 -> 0x00000000ffffb958

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 10354 Comm: syz.0.3366 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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