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BUG: KCSAN: data-race in page_counter_charge / page_counter_try_charge

read to 0xffff88821b672150 of 8 bytes by task 10429 on cpu 0:
 page_counter_charge+0x5f/0xc0 mm/page_counter.c:85
 mem_cgroup_migrate+0xb7/0x220 mm/memcontrol.c:6698
 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:1193 [inline]
 migrate_pages+0x1331/0x18e0 mm/migrate.c:1423
 do_mbind+0x937/0xa40 mm/mempolicy.c:1317
 kernel_mbind+0x111/0x130 mm/mempolicy.c:1438
 __do_sys_mbind mm/mempolicy.c:1445 [inline]
 __se_sys_mbind mm/mempolicy.c:1441 [inline]
 __x64_sys_mbind+0x89/0xb0 mm/mempolicy.c:1441
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88821b672150 of 8 bytes by task 10447 on cpu 1:
 page_counter_try_charge+0x7e/0x170 mm/page_counter.c:139
 try_charge+0x185/0xbf0 mm/memcontrol.c:2405
 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6404
 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6419
 shmem_getpage_gfp+0x3bf/0x1390 mm/shmem.c:1872
 shmem_fault+0x114/0x470 mm/shmem.c:2067
 __do_fault+0xae/0x1f0 mm/memory.c:3188
 do_read_fault mm/memory.c:3585 [inline]
 do_fault mm/memory.c:3714 [inline]
 handle_pte_fault mm/memory.c:3945 [inline]
 __handle_mm_fault+0x270d/0x2e00 mm/memory.c:4075
 handle_mm_fault+0x21b/0x530 mm/memory.c:4112
 faultin_page mm/gup.c:640 [inline]
 __get_user_pages+0x485/0x1130 mm/gup.c:851
 populate_vma_page_range+0xe6/0x100 mm/gup.c:1235
 __mm_populate+0x168/0x2a0 mm/gup.c:1283
 mm_populate include/linux/mm.h:2347 [inline]
 vm_mmap_pgoff+0x181/0x190 mm/util.c:511
 ksys_mmap_pgoff+0x99/0x420 mm/mmap.c:1607
 __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/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10447 Comm: syz-executor.5 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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