==================================================================
BUG: KCSAN: data-race in drain_all_stock / try_charge_memcg

write to 0xffff888237c2a690 of 4 bytes by task 21788 on cpu 0:
 consume_stock mm/memcontrol.c:2317 [inline]
 try_charge_memcg+0xb46/0xd20 mm/memcontrol.c:2738
 obj_cgroup_charge_pages+0xbd/0x1c0 mm/memcontrol.c:3296
 __memcg_kmem_charge_page+0x9c/0x170 mm/memcontrol.c:3322
 __alloc_pages+0x1bb/0x340 mm/page_alloc.c:4584
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:122 [inline]
 bpf_ringbuf_alloc+0xba/0x2f0 kernel/bpf/ringbuf.c:170
 ringbuf_map_alloc+0x167/0x1d0 kernel/bpf/ringbuf.c:204
 map_create+0x713/0xa40 kernel/bpf/syscall.c:1237
 __sys_bpf+0x62a/0x780 kernel/bpf/syscall.c:5439
 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]
 __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5559
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff888237c2a690 of 4 bytes by task 21729 on cpu 1:
 drain_all_stock+0xd3/0x2e0 mm/memcontrol.c:2425
 try_charge_memcg+0x6c2/0xd20 mm/memcontrol.c:2785
 obj_cgroup_charge_pages+0xbd/0x1c0 mm/memcontrol.c:3296
 __memcg_kmem_charge_page+0x9c/0x170 mm/memcontrol.c:3322
 __alloc_pages+0x1bb/0x340 mm/page_alloc.c:4584
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:122 [inline]
 bpf_ringbuf_alloc+0xba/0x2f0 kernel/bpf/ringbuf.c:170
 ringbuf_map_alloc+0x167/0x1d0 kernel/bpf/ringbuf.c:204
 map_create+0x713/0xa40 kernel/bpf/syscall.c:1237
 __sys_bpf+0x62a/0x780 kernel/bpf/syscall.c:5439
 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]
 __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5559
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000002 -> 0x0000003e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 21729 Comm: syz-executor.0 Not tainted 6.8.0-rc2-syzkaller-00055-g6764c317b6bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
==================================================================