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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffc7b9e8 of 8 bytes by task 4535 on cpu 0:
 __cgroup_account_cputime+0x5a/0xb0 kernel/cgroup/rstat.c:379
 cgroup_account_cputime include/linux/cgroup.h:797 [inline]
 update_curr+0xf4/0x240 kernel/sched/fair.c:909
 dequeue_entity+0x16/0x3f0 kernel/sched/fair.c:4424
 dequeue_task_fair+0xaf/0x3a0 kernel/sched/fair.c:5773
 dequeue_task kernel/sched/core.c:2095 [inline]
 deactivate_task kernel/sched/core.c:2109 [inline]
 __schedule+0x203/0x6c0 kernel/sched/core.c:6342
 schedule+0x71/0xa0 kernel/sched/core.c:6460
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue+0xc9/0x160 kernel/futex/waitwake.c:355
 futex_wait+0x126/0x350 kernel/futex/waitwake.c:656
 do_futex+0x283/0x2b0 kernel/futex/syscalls.c:106
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex+0xe8/0x350 kernel/futex/syscalls.c:164
 __x64_sys_futex+0x74/0x80 kernel/futex/syscalls.c:164
 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+0x44/0xae

read to 0xffffe8ffffc7b9e8 of 8 bytes by task 4531 on cpu 1:
 cgroup_base_stat_flush kernel/cgroup/rstat.c:337 [inline]
 cgroup_rstat_flush_locked+0x2e3/0x750 kernel/cgroup/rstat.c:170
 cgroup_rstat_flush_irqsafe+0x24/0x40 kernel/cgroup/rstat.c:224
 __mem_cgroup_flush_stats mm/memcontrol.c:644 [inline]
 mem_cgroup_flush_stats+0xc1/0x110 mm/memcontrol.c:652
 shrink_node+0x2fc/0x1110 mm/vmscan.c:3126
 shrink_zones+0x2c1/0x5d0 mm/vmscan.c:3458
 do_try_to_free_pages+0x165/0x720 mm/vmscan.c:3516
 try_to_free_mem_cgroup_pages+0x1cd/0x420 mm/vmscan.c:3830
 reclaim_high+0xcd/0x110 mm/memcontrol.c:2325
 mem_cgroup_handle_over_high+0x75/0x120 mm/memcontrol.c:2509
 try_charge_memcg+0x926/0x960 mm/memcontrol.c:2738
 try_charge mm/memcontrol.c:2749 [inline]
 charge_memcg+0x63/0x2c0 mm/memcontrol.c:6625
 __mem_cgroup_charge+0x25/0xa0 mm/memcontrol.c:6646
 mem_cgroup_charge include/linux/memcontrol.h:683 [inline]
 wp_page_copy+0x1e8/0x12a0 mm/memory.c:3037
 do_wp_page+0x641/0xd00
 handle_pte_fault mm/memory.c:4645 [inline]
 __handle_mm_fault mm/memory.c:4763 [inline]
 handle_mm_fault+0x897/0xa40 mm/memory.c:4861
 do_user_addr_fault+0x4cd/0x940 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30
 __put_user_nocheck_4+0x3/0x11
 schedule_tail+0x41/0x50 kernel/sched/core.c:5013
 ret_from_fork+0x8/0x30

value changed: 0x000000010a15b204 -> 0x000000010a16bc32

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4531 Comm: syz-executor.3 Not tainted 5.18.0-rc5-syzkaller-00207-g379c72654524 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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