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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 0:
 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+0x20f/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:1039 [inline]
 __sysvec_apic_timer_interrupt+0x5f/0x1d0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 is_atomic kernel/kcsan/core.c:259 [inline]
 should_watch kernel/kcsan/core.c:277 [inline]
 check_access kernel/kcsan/core.c:752 [inline]
 __tsan_read4+0xf5/0x190 kernel/kcsan/core.c:1024
 tk_xtime_coarse kernel/time/timekeeping.c:172 [inline]
 ktime_get_coarse_real_ts64_mg+0x89/0x1a0 kernel/time/timekeeping.c:2308
 inode_set_ctime_current+0x43/0x770 fs/inode.c:2726
 simple_inode_init_ts+0x19/0x70 fs/libfs.c:2115
 __shmem_get_inode mm/shmem.c:3054 [inline]
 shmem_get_inode+0x29d/0x750 mm/shmem.c:3144
 __shmem_file_setup+0x113/0x210 mm/shmem.c:5817
 shmem_file_setup+0x3b/0x50 mm/shmem.c:5859
 alloc_file mm/memfd.c:433 [inline]
 __do_sys_memfd_create mm/memfd.c:481 [inline]
 __se_sys_memfd_create+0x2c3/0x590 mm/memfd.c:459
 __x64_sys_memfd_create+0x31/0x40 mm/memfd.c:459
 x64_sys_call+0x122f/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:320
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff868099c0 of 8 bytes by task 4219 on cpu 1:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:639
 count_shadow_nodes+0x6a/0x230 mm/workingset.c:678
 do_shrink_slab+0x60/0x680 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:6035 [inline]
 shrink_node+0x6c3/0x2120 mm/vmscan.c:6074
 shrink_zones mm/vmscan.c:6318 [inline]
 do_try_to_free_pages+0x3f6/0xcd0 mm/vmscan.c:6380
 try_to_free_mem_cgroup_pages+0x1ab/0x410 mm/vmscan.c:6708
 try_charge_memcg+0x358/0x9e0 mm/memcontrol.c:2362
 try_charge mm/memcontrol.c:2504 [inline]
 charge_memcg+0x51/0xc0 mm/memcontrol.c:4770
 mem_cgroup_swapin_charge_folio+0xcc/0x150 mm/memcontrol.c:4856
 __read_swap_cache_async+0x1df/0x350 mm/swap_state.c:441
 swap_cluster_readahead+0x376/0x3e0 mm/swap_state.c:632
 shmem_swapin_cluster mm/shmem.c:1706 [inline]
 shmem_swapin_folio+0x71e/0xe40 mm/shmem.c:2321
 shmem_get_folio_gfp+0x26c/0xd60 mm/shmem.c:2465
 shmem_get_folio mm/shmem.c:2638 [inline]
 shmem_write_begin+0xa8/0x190 mm/shmem.c:3288
 generic_perform_write+0x184/0x490 mm/filemap.c:4112
 shmem_file_write_iter+0xc5/0xf0 mm/shmem.c:3463
 lo_rw_aio+0x6ed/0x7a0 include/linux/fs.h:-1
 do_req_filebacked drivers/block/loop.c:-1 [inline]
 loop_handle_cmd drivers/block/loop.c:1889 [inline]
 loop_process_work+0x52d/0xa60 drivers/block/loop.c:1924
 loop_rootcg_workfn+0x22/0x30 drivers/block/loop.c:1955
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0xdd/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000000fffff155 -> 0x00000000fffff156

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4219 Comm: kworker/u8:24 Not tainted 6.16.0-rc2-syzkaller-00047-g52da431bf03b #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: loop4 loop_rootcg_workfn
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