==================================================================
BUG: KCSAN: data-race in __cgroup_account_cputime / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffd6e670 of 8 bytes by task 4736 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
 task_fork_fair+0x5e/0x1a0 kernel/sched/fair.c:11242
 sched_cgroup_fork+0xbd/0xe0 kernel/sched/core.c:4546
 copy_process+0x125e/0x20e0 kernel/fork.c:2351
 kernel_clone+0x163/0x5c0 kernel/fork.c:2639
 __do_sys_clone kernel/fork.c:2756 [inline]
 __se_sys_clone kernel/fork.c:2740 [inline]
 __x64_sys_clone+0xbd/0xf0 kernel/fork.c:2740
 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

read to 0xffffe8ffffd6e670 of 8 bytes by task 1824 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
 reclaim_high+0xcd/0x110 mm/memcontrol.c:2325
 mem_cgroup_handle_over_high+0x75/0x120 mm/memcontrol.c:2509
 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline]
 exit_to_user_mode_loop+0xa5/0x130 kernel/entry/common.c:169
 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

value changed: 0x000000010b919883 -> 0x000000010b9fa903

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1824 Comm: syz-executor.0 Tainted: G        W         5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================