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BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffd781a0 of 8 bytes by task 8045 on cpu 1:
 __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
 put_prev_entity+0x1d/0x180 kernel/sched/fair.c:4616
 pick_next_task_fair+0x1f6/0x260 kernel/sched/fair.c:7339
 __pick_next_task kernel/sched/core.c:5695 [inline]
 pick_next_task kernel/sched/core.c:6204 [inline]
 __schedule+0x270/0x6c0 kernel/sched/core.c:6352
 schedule+0x71/0xa0 kernel/sched/core.c:6460
 exit_to_user_mode_loop+0xe5/0x130 kernel/entry/common.c:157
 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffe8ffffd781a0 of 8 bytes by task 8046 on cpu 0:
 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
 try_charge_memcg+0x270/0x960 mm/memcontrol.c:2614
 try_charge mm/memcontrol.c:2749 [inline]
 mem_cgroup_charge_skmem+0x4d/0x130 mm/memcontrol.c:6956
 sock_reserve_memory+0xaf/0x1e0 net/core/sock.c:990
 sock_setsockopt+0xf63/0x1930 net/core/sock.c:1446
 __sys_setsockopt+0x242/0x2b0 net/socket.c:2176
 __do_sys_setsockopt net/socket.c:2191 [inline]
 __se_sys_setsockopt net/socket.c:2188 [inline]
 __x64_sys_setsockopt+0x62/0x70 net/socket.c:2188
 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

value changed: 0x000000018e672ad1 -> 0x000000018e67624b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8046 Comm: syz-executor.1 Not tainted 5.18.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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