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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffc71380 of 8 bytes by task 20616 on cpu 0:
 __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
 dequeue_entity kernel/sched/fair.c:4939 [inline]
 dequeue_task_fair+0xdd/0x6d0 kernel/sched/fair.c:6396
 dequeue_task kernel/sched/core.c:2102 [inline]
 deactivate_task kernel/sched/core.c:2121 [inline]
 __schedule+0x21b/0x8b0 kernel/sched/core.c:6623
 schedule+0x51/0x80 kernel/sched/core.c:6745
 do_nanosleep+0xa2/0x2f0 kernel/time/hrtimer.c:2044
 hrtimer_nanosleep+0xe7/0x1e0 kernel/time/hrtimer.c:2097
 common_nsleep+0x68/0x80 kernel/time/posix-timers.c:1240
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1281 [inline]
 __se_sys_clock_nanosleep+0x202/0x230 kernel/time/posix-timers.c:1258
 __x64_sys_clock_nanosleep+0x55/0x60 kernel/time/posix-timers.c:1258
 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 0xffffe8ffffc71380 of 8 bytes by task 18520 on cpu 1:
 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
 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline]
 exit_to_user_mode_loop+0x9b/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x000000089df02f1f -> 0x000000089df0940f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18520 Comm: syz-executor.1 Tainted: G        W          6.4.0-rc3-syzkaller-00278-g49572d536129 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
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