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BUG: KCSAN: data-race in __refill_stock / drain_all_stock

read-write to 0xffff888237c2b950 of 4 bytes by task 11818 on cpu 0:
 __refill_stock+0x8a/0xc0 mm/memcontrol.c:2390
 refill_stock mm/memcontrol.c:2401 [inline]
 obj_cgroup_uncharge_pages+0x126/0x200 mm/memcontrol.c:3281
 __memcg_kmem_uncharge_page+0x53/0x110 mm/memcontrol.c:3354
 free_pages_prepare mm/page_alloc.c:1098 [inline]
 free_unref_page_prepare+0x61/0x2c0 mm/page_alloc.c:2347
 free_unref_page+0x34/0x180 mm/page_alloc.c:2487
 vfree+0x211/0x390 mm/vmalloc.c:3324
 __vmalloc_area_node mm/vmalloc.c:3685 [inline]
 __vmalloc_node_range+0xe16/0xee0 mm/vmalloc.c:3802
 kvmalloc_node+0x121/0x170 mm/util.c:659
 kvmalloc include/linux/slab.h:766 [inline]
 xt_alloc_table_info+0x3d/0x80 net/netfilter/x_tables.c:1193
 do_replace net/ipv6/netfilter/ip6_tables.c:1139 [inline]
 do_ip6t_set_ctl+0x63f/0x1800 net/ipv6/netfilter/ip6_tables.c:1636
 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:999
 dccp_setsockopt+0xe1/0xc40 net/dccp/proto.c:579
 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3727
 do_sock_setsockopt net/socket.c:2311 [inline]
 __sys_setsockopt+0x1d8/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

read to 0xffff888237c2b950 of 4 bytes by task 11850 on cpu 1:
 drain_all_stock+0xd3/0x2e0 mm/memcontrol.c:2431
 try_charge_memcg+0x6bb/0xd10 mm/memcontrol.c:2791
 obj_cgroup_charge_pages+0xbd/0x1d0 mm/memcontrol.c:3302
 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:3328
 __alloc_pages+0x1bc/0x360 mm/page_alloc.c:4592
 alloc_pages_mpol+0xb1/0x1e0 mm/mempolicy.c:2264
 alloc_pages+0xe1/0x100 mm/mempolicy.c:2335
 vm_area_alloc_pages mm/vmalloc.c:3545 [inline]
 __vmalloc_area_node mm/vmalloc.c:3621 [inline]
 __vmalloc_node_range+0x6f2/0xee0 mm/vmalloc.c:3802
 kvmalloc_node+0x121/0x170 mm/util.c:659
 kvmalloc include/linux/slab.h:766 [inline]
 xt_alloc_table_info+0x3d/0x80 net/netfilter/x_tables.c:1193
 do_replace net/ipv6/netfilter/ip6_tables.c:1139 [inline]
 do_ip6t_set_ctl+0x63f/0x1800 net/ipv6/netfilter/ip6_tables.c:1636
 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:999
 dccp_setsockopt+0xe1/0xc40 net/dccp/proto.c:579
 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3727
 do_sock_setsockopt net/socket.c:2311 [inline]
 __sys_setsockopt+0x1d8/0x250 net/socket.c:2334
 __do_sys_setsockopt net/socket.c:2343 [inline]
 __se_sys_setsockopt net/socket.c:2340 [inline]
 __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

value changed: 0x00000021 -> 0x00000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11850 Comm: syz-executor.4 Not tainted 6.9.0-rc1-syzkaller-00274-g486291a0e624 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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