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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+0x112/0x1b0 kernel/time/tick-sched.c:118
 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline]
 tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:290
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x221/0x5f0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x235/0x4a0 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+0x6e/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+0x404/0x410 kernel/kcsan/core.c:705
 __d_alloc+0x1bb/0x350 fs/dcache.c:1723
 d_alloc+0x2e/0x100 fs/dcache.c:1760
 lookup_one_qstr_excl_raw+0x96/0x1b0 fs/namei.c:1685
 lookup_one_qstr_excl fs/namei.c:1711 [inline]
 filename_create+0x149/0x2b0 fs/namei.c:4133
 do_symlinkat+0x82/0x370 fs/namei.c:4742
 __do_sys_symlinkat fs/namei.c:4765 [inline]
 __se_sys_symlinkat fs/namei.c:4762 [inline]
 __x64_sys_symlinkat+0x5e/0x70 fs/namei.c:4762
 x64_sys_call+0x14dc/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:267
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff868099c0 of 8 bytes by task 12596 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:643
 count_shadow_nodes+0x6b/0x230 mm/workingset.c:680
 do_shrink_slab+0x5e/0x6a0 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x4f2/0x860 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:5991 [inline]
 shrink_node+0x647/0x1da0 mm/vmscan.c:6030
 shrink_zones mm/vmscan.c:6274 [inline]
 do_try_to_free_pages+0x3c6/0xc10 mm/vmscan.c:6336
 try_to_free_mem_cgroup_pages+0x1e6/0x4a0 mm/vmscan.c:6664
 try_charge_memcg+0x3ab/0x890 mm/memcontrol.c:2304
 obj_cgroup_charge_pages+0xc0/0x1a0 mm/memcontrol.c:2695
 obj_cgroup_charge+0x101/0x170 mm/memcontrol.c:3006
 __memcg_slab_post_alloc_hook+0x20d/0x5a0 mm/memcontrol.c:3067
 memcg_slab_post_alloc_hook mm/slub.c:2197 [inline]
 slab_post_alloc_hook mm/slub.c:4171 [inline]
 slab_alloc_node mm/slub.c:4210 [inline]
 kmem_cache_alloc_noprof+0x237/0x340 mm/slub.c:4217
 alloc_buffer_head+0x35/0x1f0 fs/buffer.c:2997
 folio_alloc_buffers+0x168/0x310 fs/buffer.c:924
 create_empty_buffers+0x2c/0x200 fs/buffer.c:1662
 folio_create_buffers fs/buffer.c:1773 [inline]
 __block_write_begin_int+0x1d1/0xf90 fs/buffer.c:2097
 block_page_mkwrite+0x1b7/0x3f0 fs/buffer.c:2611
 ext4_page_mkwrite+0x756/0xb90 fs/ext4/inode.c:6242
 do_page_mkwrite mm/memory.c:3287 [inline]
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing mm/memory.c:4160 [inline]
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault mm/memory.c:6140 [inline]
 handle_mm_fault+0x14ba/0x2e80 mm/memory.c:6309
 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x296/0x6a0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x00000000ffffe19b -> 0x00000000ffffe19c

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 12596 Comm: syz.3.2927 Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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