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BUG: KCSAN: data-race in lruvec_lru_size / mem_cgroup_update_lru_size

write to 0xffff8880b838b208 of 8 bytes by task 10349 on cpu 0:
 mem_cgroup_update_lru_size+0x73/0x110 mm/memcontrol.c:1277
 update_lru_size include/linux/mm_inline.h:43 [inline]
 move_pages_to_lru+0x37b/0xa70 mm/vmscan.c:1854
 shrink_inactive_list+0x4a5/0x8d0 mm/vmscan.c:1957
 shrink_list mm/vmscan.c:2164 [inline]
 shrink_lruvec+0x4c9/0xd20 mm/vmscan.c:2482
 shrink_node_memcgs mm/vmscan.c:2671 [inline]
 shrink_node+0x30a/0x1000 mm/vmscan.c:2777
 shrink_zones mm/vmscan.c:2980 [inline]
 do_try_to_free_pages+0x230/0xb30 mm/vmscan.c:3033
 try_to_free_mem_cgroup_pages+0x1f7/0x4b0 mm/vmscan.c:3355
 reclaim_high.constprop.0+0xee/0x140 mm/memcontrol.c:2232
 mem_cgroup_handle_over_high+0x8f/0x180 mm/memcontrol.c:2313
 tracehook_notify_resume include/linux/tracehook.h:197 [inline]
 exit_to_usermode_loop+0x20a/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode+0x190/0x1c0 arch/x86/entry/common.c:195
 swapgs_restore_regs_and_return_to_usermode+0x0/0x40

read to 0xffff8880b838b208 of 8 bytes by task 7850 on cpu 1:
 mem_cgroup_get_zone_lru_size include/linux/memcontrol.h:536 [inline]
 lruvec_lru_size+0xe6/0x1a0 mm/vmscan.c:326
 get_scan_count mm/vmscan.c:2349 [inline]
 shrink_lruvec+0x170/0xd20 mm/vmscan.c:2452
 shrink_node_memcgs mm/vmscan.c:2671 [inline]
 shrink_node+0x30a/0x1000 mm/vmscan.c:2777
 shrink_zones mm/vmscan.c:2980 [inline]
 do_try_to_free_pages+0x230/0xb30 mm/vmscan.c:3033
 try_to_free_mem_cgroup_pages+0x1f7/0x4b0 mm/vmscan.c:3355
 reclaim_high.constprop.0+0xee/0x140 mm/memcontrol.c:2232
 mem_cgroup_handle_over_high+0x8f/0x180 mm/memcontrol.c:2313
 tracehook_notify_resume include/linux/tracehook.h:197 [inline]
 exit_to_usermode_loop+0x20a/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode+0x190/0x1c0 arch/x86/entry/common.c:195
 swapgs_restore_regs_and_return_to_usermode+0x0/0x40

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7850 Comm: syz-executor.0 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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