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BUG: KCSAN: data-race in drain_all_stock / drain_obj_stock

write to 0xffff888237c29638 of 8 bytes by interrupt on cpu 0:
 drain_obj_stock+0x408/0x4e0 mm/memcontrol.c:3296
 refill_obj_stock+0x9c/0x1e0 mm/memcontrol.c:3330
 obj_cgroup_uncharge+0xe/0x10 mm/memcontrol.c:3398
 memcg_slab_free_hook mm/slab.h:579 [inline]
 __cache_free mm/slab.c:3379 [inline]
 __do_kmem_cache_free mm/slab.c:3582 [inline]
 kmem_cache_free+0x105/0x280 mm/slab.c:3607
 sock_free_inode+0x2c/0x30 net/socket.c:325
 i_callback+0x32/0x60 fs/inode.c:248
 rcu_do_batch kernel/rcu/tree.c:2246 [inline]
 rcu_core+0x5a5/0xc00 kernel/rcu/tree.c:2506
 rcu_core_si+0xd/0x10 kernel/rcu/tree.c:2523
 __do_softirq+0xe4/0x2b0 kernel/softirq.c:571
 run_ksoftirqd+0x23/0x30 kernel/softirq.c:934
 smpboot_thread_fn+0x2f8/0x490 kernel/smpboot.c:164
 kthread+0x1ac/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888237c29638 of 8 bytes by task 19 on cpu 1:
 obj_stock_flush_required mm/memcontrol.c:3309 [inline]
 drain_all_stock+0x16d/0x2a0 mm/memcontrol.c:2351
 mem_cgroup_css_offline+0x85/0x140 mm/memcontrol.c:5417
 offline_css kernel/cgroup/cgroup.c:5504 [inline]
 css_killed_work_fn+0x82/0x230 kernel/cgroup/cgroup.c:5780
 process_one_work+0x3e6/0x750 kernel/workqueue.c:2289
 worker_thread+0x5ef/0xa10 kernel/workqueue.c:2436
 kthread+0x1ac/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0xffff8881275d38c0 -> 0xffff888127747540

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19 Comm: kworker/1:0 Tainted: G        W          6.2.0-rc8-syzkaller-00021-ge1c04510f521-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: cgroup_destroy css_killed_work_fn
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