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BUG: KCSAN: data-race in mem_cgroup_flush_stats / mem_cgroup_flush_stats_delayed

write to 0xffffffff86ea8d68 of 8 bytes by task 26203 on cpu 0:
 __mem_cgroup_flush_stats mm/memcontrol.c:641 [inline]
 mem_cgroup_flush_stats+0x97/0x110 mm/memcontrol.c:650
 shrink_node+0x2fc/0x10f0 mm/vmscan.c:3150
 shrink_zones+0x2c1/0x5d0 mm/vmscan.c:3482
 do_try_to_free_pages+0x165/0x720 mm/vmscan.c:3540
 try_to_free_mem_cgroup_pages+0x1cd/0x420 mm/vmscan.c:3854
 try_charge_memcg+0x270/0x960 mm/memcontrol.c:2622
 try_charge mm/memcontrol.c:2757 [inline]
 mem_cgroup_charge_skmem+0x4d/0x130 mm/memcontrol.c:7051
 sock_reserve_memory+0xaf/0x1e0 net/core/sock.c:1016
 sock_setsockopt+0xeeb/0x1a40 net/core/sock.c:1481
 __sys_setsockopt+0x242/0x2b0 net/socket.c:2250
 __do_sys_setsockopt net/socket.c:2265 [inline]
 __se_sys_setsockopt net/socket.c:2262 [inline]
 __x64_sys_setsockopt+0x62/0x70 net/socket.c:2262
 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+0x63/0xcd

read to 0xffffffff86ea8d68 of 8 bytes by task 26188 on cpu 1:
 mem_cgroup_flush_stats_delayed+0x21/0x140 mm/memcontrol.c:655
 workingset_refault+0x3c2/0x7b0 mm/workingset.c:358
 filemap_add_folio+0xe2/0x150 mm/filemap.c:973
 page_cache_ra_unbounded+0x19e/0x2e0 mm/readahead.c:245
 do_page_cache_ra mm/readahead.c:293 [inline]
 page_cache_ra_order mm/readahead.c:550 [inline]
 ondemand_readahead+0x5df/0x780 mm/readahead.c:672
 page_cache_sync_ra+0xdc/0xf0 mm/readahead.c:699
 page_cache_sync_readahead include/linux/pagemap.h:1234 [inline]
 filemap_get_pages mm/filemap.c:2594 [inline]
 filemap_read+0x3ef/0x1410 mm/filemap.c:2688
 generic_file_read_iter+0x72/0x320 mm/filemap.c:2834
 ext4_file_read_iter+0x1e9/0x2a0
 call_read_iter include/linux/fs.h:2052 [inline]
 generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870
 do_splice_direct+0xfb/0x180 fs/splice.c:979
 do_sendfile+0x3bf/0x910 fs/read_write.c:1262
 __do_sys_sendfile64 fs/read_write.c:1330 [inline]
 __se_sys_sendfile64 fs/read_write.c:1316 [inline]
 __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1316
 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+0x63/0xcd

value changed: 0x000000010000fa1d -> 0x000000010000fa1e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 26188 Comm: syz-executor.3 Not tainted 5.19.0-rc8-syzkaller-00017-g39c3c396f813-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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