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BUG: KCSAN: data-race in __cgroup_account_cputime_field / cgroup_rstat_flush_locked

read-write to 0xffffe8ffffd79868 of 8 bytes by interrupt on cpu 1:
 __cgroup_account_cputime_field+0xae/0x100
 cgroup_account_cputime_field include/linux/cgroup.h:737 [inline]
 task_group_account_field kernel/sched/cputime.c:113 [inline]
 account_system_index_time+0x7e/0x90 kernel/sched/cputime.c:176
 update_process_times+0x22/0x120 kernel/time/timer.c:2069
 tick_sched_handle kernel/time/tick-sched.c:243 [inline]
 tick_sched_timer+0x23f/0x2c0 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x224/0x7c0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0xa7/0x250 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1107
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:696
 crc32_body lib/crc32.c:106 [inline]
 crc32_le_generic lib/crc32.c:179 [inline]
 __crc32c_le_base+0xa3/0x520 lib/crc32.c:201
 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88
 crypto_shash_update+0x136/0x1a0 crypto/shash.c:121
 ext4_chksum fs/ext4/ext4.h:2464 [inline]
 ext4_dirblock_csum fs/ext4/namei.c:381 [inline]
 ext4_dirblock_csum_set fs/ext4/namei.c:429 [inline]
 ext4_handle_dirty_dirblock+0x26d/0x340 fs/ext4/namei.c:437
 add_dirent_to_buf+0x35e/0x440 fs/ext4/namei.c:2195
 ext4_add_entry+0x3d6/0x1e70 fs/ext4/namei.c:2423
 ext4_add_nondir+0x50/0x190 fs/ext4/namei.c:2771
 ext4_symlink+0x4c5/0x580 fs/ext4/namei.c:3410
 vfs_symlink+0xc2/0x1a0 fs/namei.c:4398
 do_symlinkat+0xe3/0x320 fs/namei.c:4424
 __do_sys_symlinkat fs/namei.c:4440 [inline]
 __se_sys_symlinkat fs/namei.c:4437 [inline]
 __x64_sys_symlinkat+0x62/0x70 fs/namei.c:4437
 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 0xffffe8ffffd79868 of 8 bytes by task 3147 on cpu 0:
 cgroup_base_stat_flush kernel/cgroup/rstat.c:373 [inline]
 cgroup_rstat_flush_locked+0x2c3/0x700 kernel/cgroup/rstat.c:199
 cgroup_rstat_flush_irqsafe+0x28/0x40 kernel/cgroup/rstat.c:254
 __mem_cgroup_flush_stats mm/memcontrol.c:645 [inline]
 mem_cgroup_flush_stats+0xc5/0x120 mm/memcontrol.c:653
 prepare_scan_count mm/vmscan.c:2848 [inline]
 shrink_node+0x321/0x14f0 mm/vmscan.c:6471
 shrink_zones mm/vmscan.c:6711 [inline]
 do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6773
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:7088
 reclaim_high+0xca/0x110 mm/memcontrol.c:2403
 mem_cgroup_handle_over_high+0x8c/0x1a0 mm/memcontrol.c:2588
 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline]
 exit_to_user_mode_loop+0x99/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x6a/0xa0 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: 0x00000001c6f79f1b -> 0x00000001c790359b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3147 Comm: syz-executor.3 Not tainted 6.3.0-rc4-syzkaller-00039-gffe78bbd5121 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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