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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffc77fb0 of 8 bytes by task 26387 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
 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]
 might_alloc include/linux/sched/mm.h:306 [inline]
 prepare_alloc_pages mm/page_alloc.c:4539 [inline]
 __alloc_pages+0xfe/0x340 mm/page_alloc.c:4757
 vma_alloc_folio+0x6a3/0x8c0 mm/mempolicy.c:2240
 wp_page_copy mm/memory.c:3070 [inline]
 do_wp_page+0x9e3/0x1fd0 mm/memory.c:3432
 handle_pte_fault mm/memory.c:4964 [inline]
 __handle_mm_fault mm/memory.c:5089 [inline]
 handle_mm_fault+0x5ba/0x2c60 mm/memory.c:5243
 do_user_addr_fault arch/x86/mm/fault.c:1349 [inline]
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x256/0x780 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

read to 0xffffe8ffffc77fb0 of 8 bytes by task 3062 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: 0x00000008cde5b9f2 -> 0x00000008cdf2b555

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3062 Comm: syz-executor.5 Tainted: G        W          6.4.0-rc5-syzkaller-00133-g25041a4c02c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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