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BUG: KCSAN: data-race in __mod_memcg_lruvec_state / mem_cgroup_css_rstat_flush

write to 0xffffe8ffffc5b000 of 4 bytes by task 39 on cpu 1:
 mem_cgroup_css_rstat_flush+0x4ea/0x540 mm/memcontrol.c:5848
 cgroup_rstat_flush_locked+0x848/0x980 kernel/cgroup/rstat.c:245
 cgroup_rstat_flush+0x26/0x40 kernel/cgroup/rstat.c:277
 do_flush_stats mm/memcontrol.c:745 [inline]
 flush_memcg_stats_dwork+0x50/0x90 mm/memcontrol.c:782
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335
 worker_thread+0x526/0x730 kernel/workqueue.c:3416
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read-write to 0xffffe8ffffc5b000 of 4 bytes by task 4258 on cpu 0:
 memcg_rstat_updated mm/memcontrol.c:725 [inline]
 __mod_memcg_lruvec_state+0x13a/0x1a0 mm/memcontrol.c:875
 mod_memcg_lruvec_state include/linux/memcontrol.h:1082 [inline]
 mod_objcg_mlstate mm/memcontrol.c:3003 [inline]
 mod_objcg_state+0x43c/0x590 mm/memcontrol.c:3418
 __memcg_slab_free_hook+0xe3/0x130 mm/slub.c:2001
 memcg_slab_free_hook mm/slub.c:2020 [inline]
 slab_free_bulk mm/slub.c:4288 [inline]
 kmem_cache_free_bulk+0x1df/0x260 mm/slub.c:4507
 kfree_bulk include/linux/slab.h:545 [inline]
 kvfree_rcu_bulk+0xfc/0x250 kernel/rcu/tree.c:3033
 kvfree_rcu_drain_ready kernel/rcu/tree.c:3207 [inline]
 kfree_rcu_monitor+0x4bd/0xc50 kernel/rcu/tree.c:3225
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335
 worker_thread+0x526/0x730 kernel/workqueue.c:3416
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x0000003f -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4258 Comm: kworker/0:10 Tainted: G        W          6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events kfree_rcu_monitor
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