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BUG: KCSAN: data-race in drain_all_stock / obj_cgroup_uncharge_pages

write to 0xffff888237c28138 of 4 bytes by interrupt on cpu 0:
 refill_stock mm/memcontrol.c:2215 [inline]
 obj_cgroup_uncharge_pages+0x169/0x240 mm/memcontrol.c:2984
 refill_obj_stock+0x15f/0x220 mm/memcontrol.c:3234
 obj_cgroup_uncharge+0xa/0x10 mm/memcontrol.c:3283
 memcg_slab_free_hook+0xd9/0x150 mm/slab.h:364
 ___cache_free+0x46/0x300 mm/slab.c:3464
 __cache_free mm/slab.c:3453 [inline]
 kmem_cache_free+0x65/0x110 mm/slab.c:3741
 file_free_rcu+0x73/0x80 fs/file_table.c:50
 rcu_do_batch kernel/rcu/tree.c:2506 [inline]
 rcu_core+0x7f7/0xeb0 kernel/rcu/tree.c:2741
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2754
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:921
 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

read to 0xffff888237c28138 of 4 bytes by task 28209 on cpu 1:
 drain_all_stock+0xd5/0x4b0 mm/memcontrol.c:2248
 try_charge_memcg+0x69b/0xa50 mm/memcontrol.c:2600
 obj_cgroup_charge_pages+0xac/0x140 mm/memcontrol.c:3005
 obj_cgroup_charge+0xe2/0x1b0 mm/memcontrol.c:3274
 memcg_slab_pre_alloc_hook mm/slab.h:287 [inline]
 slab_pre_alloc_hook mm/slab.h:497 [inline]
 slab_alloc_node mm/slab.c:3222 [inline]
 kmem_cache_alloc_node+0xae/0x2d0 mm/slab.c:3599
 alloc_task_struct_node kernel/fork.c:170 [inline]
 dup_task_struct+0x63/0x680 kernel/fork.c:882
 copy_process+0x3f4/0x2fd0 kernel/fork.c:2023
 kernel_clone+0x15c/0x6a0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0xc6/0xf0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000003 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28209 Comm: syz-executor.5 Tainted: G        W         5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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