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BUG: KCSAN: data-race in drain_all_stock / refill_stock

read-write to 0xffff888237c28370 of 4 bytes by task 10697 on cpu 0:
 __refill_stock mm/memcontrol.c:2247 [inline]
 refill_stock+0xcf/0x130 mm/memcontrol.c:2258
 obj_cgroup_uncharge_pages+0x75/0x130 mm/memcontrol.c:2978
 refill_obj_stock+0x16d/0x1e0 mm/memcontrol.c:3249
 obj_cgroup_uncharge+0xa/0x10 mm/memcontrol.c:3298
 pcpu_memcg_free_hook mm/percpu.c:1679 [inline]
 free_percpu+0x25a/0xa50 mm/percpu.c:2284
 htab_free_elems kernel/bpf/hashtab.c:289 [inline]
 prealloc_init kernel/bpf/hashtab.c:381 [inline]
 htab_map_alloc+0x9c6/0xc00 kernel/bpf/hashtab.c:558
 find_and_alloc_map kernel/bpf/syscall.c:131 [inline]
 map_create+0x38a/0x710 kernel/bpf/syscall.c:1082
 __sys_bpf+0x296/0x630 kernel/bpf/syscall.c:4899
 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5019
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffff888237c28370 of 4 bytes by task 10684 on cpu 1:
 drain_all_stock+0xb5/0x2e0 mm/memcontrol.c:2288
 try_charge_memcg+0x68a/0x960 mm/memcontrol.c:2630
 obj_cgroup_charge_pages mm/memcontrol.c:2999 [inline]
 obj_cgroup_charge+0x171/0x2b0 mm/memcontrol.c:3289
 pcpu_memcg_pre_alloc_hook+0x7c/0x150 mm/percpu.c:1638
 pcpu_alloc+0x1a0/0x1020 mm/percpu.c:1763
 __alloc_percpu_gfp+0x22/0x30 mm/percpu.c:1937
 bpf_map_alloc_percpu+0xab/0x120 kernel/bpf/syscall.c:462
 prealloc_init kernel/bpf/hashtab.c:346 [inline]
 htab_map_alloc+0x76e/0xc00 kernel/bpf/hashtab.c:558
 find_and_alloc_map kernel/bpf/syscall.c:131 [inline]
 map_create+0x38a/0x710 kernel/bpf/syscall.c:1082
 __sys_bpf+0x296/0x630 kernel/bpf/syscall.c:4899
 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]
 __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:5019
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x0000001c -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10684 Comm: syz-executor.2 Not tainted 5.19.0-rc1-syzkaller-00011-g9886142c7a22-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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