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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffc85468 of 8 bytes by task 11652 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
 enqueue_entity kernel/sched/fair.c:4836 [inline]
 enqueue_task_fair+0x120/0x820 kernel/sched/fair.c:6318
 enqueue_task kernel/sched/core.c:2082 [inline]
 activate_task+0xd8/0x110 kernel/sched/core.c:2112
 ttwu_do_activate+0x5d/0x1c0 kernel/sched/core.c:3735
 ttwu_queue kernel/sched/core.c:3985 [inline]
 try_to_wake_up+0x280/0x5c0 kernel/sched/core.c:4307
 wake_up_process kernel/sched/core.c:4441 [inline]
 wake_up_q+0x3f/0x70 kernel/sched/core.c:1029
 rwsem_wake kernel/locking/rwsem.c:1214 [inline]
 __up_write kernel/locking/rwsem.c:1376 [inline]
 up_write+0xc9/0xe0 kernel/locking/rwsem.c:1626
 ext4_map_blocks+0xb45/0x1050 fs/ext4/inode.c:701
 mpage_map_one_extent fs/ext4/inode.c:2183 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2236 [inline]
 ext4_do_writepages+0xdc5/0x21e0 fs/ext4/inode.c:2703
 ext4_writepages+0x15e/0x2e0 fs/ext4/inode.c:2792
 do_writepages+0x1c5/0x340 mm/page-writeback.c:2551
 __writeback_single_inode+0x91/0x860 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x511/0xaa0 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0x9a/0x1a0 fs/fs-writeback.c:1965
 wb_writeback+0x24d/0x6c0 fs/fs-writeback.c:2070
 wb_check_start_all fs/fs-writeback.c:2192 [inline]
 wb_do_writeback fs/fs-writeback.c:2218 [inline]
 wb_workfn+0x4ea/0x8d0 fs/fs-writeback.c:2251
 process_one_work+0x3e6/0x750 kernel/workqueue.c:2405
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2552
 kthread+0x1d7/0x210 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffffe8ffffc85468 of 8 bytes by task 13792 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
 try_charge_memcg+0x27d/0xd20 mm/memcontrol.c:2724
 try_charge mm/memcontrol.c:2866 [inline]
 mem_cgroup_charge_skmem+0x51/0x1c0 mm/memcontrol.c:7351
 sock_reserve_memory+0xb1/0x370 net/core/sock.c:1025
 sk_setsockopt+0x800/0x1de0 net/core/sock.c:1520
 sock_setsockopt+0x3c/0x50 net/core/sock.c:1546
 __sys_setsockopt+0x177/0x230 net/socket.c:2269
 __do_sys_setsockopt net/socket.c:2284 [inline]
 __se_sys_setsockopt net/socket.c:2281 [inline]
 __x64_sys_setsockopt+0x66/0x80 net/socket.c:2281
 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: 0x0000000010b1ff7a -> 0x0000000010b25962

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13792 Comm: syz-executor.2 Not tainted 6.4.0-rc4-syzkaller-00204-gc43a6ff9f93f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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