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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+0x275/0x810 kernel/time/hrtimer.c:1912
 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
 page_vma_mapped_walk+0x64/0xd20 mm/page_vma_mapped.c:189
 page_vma_mkclean_one+0x194/0x380 mm/rmap.c:1112
 page_mkclean_one+0x125/0x160 mm/rmap.c:1180
 __rmap_walk_file+0x1ec/0x2b0 mm/rmap.c:3056
 rmap_walk_file mm/rmap.c:3089 [inline]
 rmap_walk mm/rmap.c:3100 [inline]
 folio_mkclean+0x1e0/0x240 mm/rmap.c:1212
 folio_clear_dirty_for_io+0xa5/0x390 mm/page-writeback.c:2909
 mpage_submit_folio fs/ext4/inode.c:2071 [inline]
 mpage_process_page_bufs+0x400/0x620 fs/ext4/inode.c:2201
 mpage_prepare_extent_to_map+0x7d4/0xc50 fs/ext4/inode.c:2740
 ext4_do_writepages+0x70f/0x2840 fs/ext4/inode.c:2881
 ext4_writepages+0x18f/0x320 fs/ext4/inode.c:3029
 do_writepages+0x1c6/0x310 mm/page-writeback.c:2575
 __writeback_single_inode+0x80/0x720 fs/fs-writeback.c:1762
 writeback_sb_inodes+0x4fe/0xaf0 fs/fs-writeback.c:2054
 __writeback_inodes_wb+0x94/0x1a0 fs/fs-writeback.c:2130
 wb_writeback+0x272/0x5d0 fs/fs-writeback.c:2241
 wb_check_start_all fs/fs-writeback.c:2367 [inline]
 wb_do_writeback fs/fs-writeback.c:2393 [inline]
 wb_workfn+0x4fd/0x970 fs/fs-writeback.c:2426
 process_one_work kernel/workqueue.c:3288 [inline]
 process_scheduled_works+0x513/0xa10 kernel/workqueue.c:3371
 worker_thread+0x58a/0x780 kernel/workqueue.c:3452
 kthread+0x22a/0x280 kernel/kthread.c:436
 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffffffff86c09a00 of 8 bytes by task 29774 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
 obj_cgroup_charge_pages+0x23/0xc0 mm/memcontrol.c:2857
 __memcg_kmem_charge_page+0x9e/0x170 mm/memcontrol.c:2901
 __alloc_frozen_pages_noprof+0x18a/0x360 mm/page_alloc.c:5267
 alloc_pages_mpol+0xb3/0x260 mm/mempolicy.c:2490
 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline]
 alloc_pages_noprof+0x8f/0x140 mm/mempolicy.c:2581
 vm_area_alloc_pages mm/vmalloc.c:3731 [inline]
 __vmalloc_area_node mm/vmalloc.c:3876 [inline]
 __vmalloc_node_range_noprof+0xa46/0x12b0 mm/vmalloc.c:4064
 __kvmalloc_node_noprof+0x3d4/0x650 mm/slub.c:6780
 futex_hash_allocate+0x190/0x9d0 kernel/futex/core.c:1812
 futex_hash_prctl+0xd8/0xf0 kernel/futex/core.c:1958
 __do_sys_prctl kernel/sys.c:2885 [inline]
 __se_sys_prctl+0x4f4/0x1400 kernel/sys.c:2534
 __x64_sys_prctl+0x67/0x80 kernel/sys.c:2534
 x64_sys_call+0x2533/0x3020 arch/x86/include/generated/asm/syscalls_64.h:158
 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

value changed: 0x0000000100005b3d -> 0x0000000100005b3e

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 29774 Comm: syz.4.8053 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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