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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffd77ce8 of 8 bytes by task 21889 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
 put_prev_entity+0x1d/0x110 kernel/sched/fair.c:5141
 pick_next_task_fair+0x20f/0x280 kernel/sched/fair.c:8059
 __pick_next_task kernel/sched/core.c:5972 [inline]
 pick_next_task kernel/sched/core.c:6488 [inline]
 __schedule+0x290/0x8b0 kernel/sched/core.c:6633
 preempt_schedule_common kernel/sched/core.c:6838 [inline]
 __cond_resched+0x28/0x50 kernel/sched/core.c:8516
 might_resched include/linux/kernel.h:111 [inline]
 __ext4_handle_dirty_metadata+0x2c/0x470 fs/ext4/ext4_jbd2.c:349
 ext4_handle_dirty_dirblock+0x186/0x340 fs/ext4/namei.c:438
 add_dirent_to_buf+0x35e/0x440 fs/ext4/namei.c:2211
 ext4_add_entry+0x3e3/0x1eb0 fs/ext4/namei.c:2444
 ext4_add_nondir+0x50/0x190 fs/ext4/namei.c:2792
 ext4_symlink+0x4c5/0x580 fs/ext4/namei.c:3431
 vfs_symlink+0xc2/0x1a0 fs/namei.c:4475
 do_symlinkat+0xe3/0x320 fs/namei.c:4501
 __do_sys_symlinkat fs/namei.c:4517 [inline]
 __se_sys_symlinkat fs/namei.c:4514 [inline]
 __x64_sys_symlinkat+0x62/0x70 fs/namei.c:4514
 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 0xffffe8ffffd77ce8 of 8 bytes by task 3076 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
 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: 0x0000000308e8e38e -> 0x0000000308ef01ab

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3076 Comm: syz-executor.3 Not tainted 6.4.0-rc3-syzkaller-00190-g0d85b27b0cc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
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