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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffd7b508 of 8 bytes by task 7960 on cpu 1:
 __cgroup_account_cputime+0x44/0xa0 kernel/cgroup/rstat.c:415
 cgroup_account_cputime include/linux/cgroup.h:724 [inline]
 update_curr+0xf8/0x250 kernel/sched/fair.c:930
 task_fork_fair+0x58/0xc0 kernel/sched/fair.c:12101
 sched_cgroup_fork+0xe0/0x100 kernel/sched/core.c:4777
 copy_process+0x14c9/0x21b0 kernel/fork.c:2618
 kernel_clone+0x169/0x560 kernel/fork.c:2918
 __do_sys_clone kernel/fork.c:3061 [inline]
 __se_sys_clone kernel/fork.c:3045 [inline]
 __x64_sys_clone+0xe8/0x120 kernel/fork.c:3045
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffffe8ffffd7b508 of 8 bytes by task 15926 on cpu 0:
 cgroup_base_stat_flush kernel/cgroup/rstat.c:373 [inline]
 cgroup_rstat_flush_locked+0x2e1/0x700 kernel/cgroup/rstat.c:199
 cgroup_rstat_flush+0x2b/0x40 kernel/cgroup/rstat.c:239
 do_flush_stats mm/memcontrol.c:658 [inline]
 mem_cgroup_flush_stats+0x9f/0xd0 mm/memcontrol.c:672
 prepare_scan_count mm/vmscan.c:2915 [inline]
 shrink_node+0x2fa/0x1500 mm/vmscan.c:6500
 shrink_zones mm/vmscan.c:6737 [inline]
 do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6799
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:7114
 reclaim_high+0xca/0x110 mm/memcontrol.c:2432
 mem_cgroup_handle_over_high+0x8c/0x1a0 mm/memcontrol.c:2617
 try_charge_memcg+0xb35/0xd20 mm/memcontrol.c:2855
 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3138
 obj_cgroup_charge+0xe9/0x140 mm/memcontrol.c:3428
 memcg_slab_pre_alloc_hook mm/slab.h:464 [inline]
 slab_pre_alloc_hook+0x112/0x180 mm/slab.h:675
 slab_alloc_node mm/slab.c:3240 [inline]
 slab_alloc mm/slab.c:3265 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3442 [inline]
 kmem_cache_alloc_lru+0x54/0x260 mm/slab.c:3458
 __d_alloc+0x3d/0x380 fs/dcache.c:1769
 d_alloc_pseudo+0x1e/0x50 fs/dcache.c:1899
 alloc_file_pseudo+0x74/0x160 fs/file_table.c:266
 sock_alloc_file+0x9c/0x1b0 net/socket.c:466
 sock_map_fd net/socket.c:490 [inline]
 __sys_socket+0x103/0x220 net/socket.c:1671
 __do_sys_socket net/socket.c:1676 [inline]
 __se_sys_socket net/socket.c:1674 [inline]
 __x64_sys_socket+0x3f/0x50 net/socket.c:1674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000006a15290c5 -> 0x00000006a15707e9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 15926 Comm: syz-executor.1 Not tainted 6.4.0-rc4-syzkaller-00031-g8b817fded42d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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