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BUG: KCSAN: data-race in mem_cgroup_select_victim_node / mem_cgroup_select_victim_node

read to 0xffff8880a3f299b0 of 4 bytes by task 7327 on cpu 0:
 mem_cgroup_select_victim_node+0x92/0x3d0 mm/memcontrol.c:1675
 try_to_free_mem_cgroup_pages+0x175/0x4c0 mm/vmscan.c:3374
 try_charge+0x479/0xbe0 mm/memcontrol.c:2572
 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6513
 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6528
 do_anonymous_page mm/memory.c:3006 [inline]
 handle_pte_fault mm/memory.c:3847 [inline]
 __handle_mm_fault+0x17ab/0x2c70 mm/memory.c:3973
 handle_mm_fault+0x21b/0x530 mm/memory.c:4010
 faultin_page mm/gup.c:640 [inline]
 __get_user_pages+0x485/0x1160 mm/gup.c:845
 populate_vma_page_range+0xe6/0x100 mm/gup.c:1223
 __mm_populate+0x168/0x2a0 mm/gup.c:1271
 mm_populate include/linux/mm.h:2357 [inline]
 __do_sys_mremap mm/mremap.c:727 [inline]
 __se_sys_mremap mm/mremap.c:595 [inline]
 __x64_sys_mremap+0x5bf/0x760 mm/mremap.c:595
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880a3f299b0 of 4 bytes by task 7665 on cpu 1:
 mem_cgroup_select_victim_node+0xb5/0x3d0 mm/memcontrol.c:1686
 try_to_free_mem_cgroup_pages+0x175/0x4c0 mm/vmscan.c:3374
 try_charge+0x479/0xbe0 mm/memcontrol.c:2572
 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6513
 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6528
 wp_page_copy+0x322/0x1120 mm/memory.c:2333
 do_wp_page+0x192/0x11f0 mm/memory.c:2628
 handle_pte_fault mm/memory.c:3865 [inline]
 __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973
 handle_mm_fault+0x21b/0x530 mm/memory.c:4010
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7665 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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