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BUG: KCSAN: data-race in page_counter_charge / page_counter_try_charge

write to 0xffff88821b66e150 of 8 bytes by task 10792 on cpu 1:
 page_counter_try_charge+0x7e/0x170 mm/page_counter.c:139
 try_charge+0x185/0xbe0 mm/memcontrol.c:2522
 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6513
 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6528
 shmem_getpage_gfp+0x3bf/0x1390 mm/shmem.c:1871
 shmem_fault+0x114/0x3f0 mm/shmem.c:2065
 __do_fault+0xae/0x1f0 mm/memory.c:3092
 do_read_fault mm/memory.c:3489 [inline]
 do_fault mm/memory.c:3618 [inline]
 handle_pte_fault mm/memory.c:3849 [inline]
 __handle_mm_fault+0x1f90/0x2c70 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]
 vm_mmap_pgoff+0x181/0x190 mm/util.c:501
 ksys_mmap_pgoff+0x99/0x420 mm/mmap.c:1629
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
 __x64_sys_mmap+0x2e/0x40 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88821b66e150 of 8 bytes by task 10763 on cpu 0:
 page_counter_charge+0x5f/0xc0 mm/page_counter.c:85
 mem_cgroup_migrate+0x95/0x1d0 mm/memcontrol.c:6807
 migrate_page_states+0x52f/0x930 mm/migrate.c:651
 migrate_page_copy+0x288/0x9a0 mm/migrate.c:662
 migrate_page+0xf2/0x150 mm/migrate.c:690
 move_to_new_page+0xcb/0x3d0 mm/migrate.c:950
 __unmap_and_move mm/migrate.c:1116 [inline]
 unmap_and_move mm/migrate.c:1197 [inline]
 migrate_pages+0x1318/0x19a0 mm/migrate.c:1427
 do_mbind mm/mempolicy.c:1302 [inline]
 kernel_mbind+0x98a/0xad0 mm/mempolicy.c:1423
 __do_sys_mbind mm/mempolicy.c:1430 [inline]
 __se_sys_mbind mm/mempolicy.c:1426 [inline]
 __x64_sys_mbind+0x89/0xb0 mm/mempolicy.c:1426
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10763 Comm: syz-executor.2 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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