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BUG: KCSAN: data-race in page_counter_charge / page_counter_try_charge

write to 0xffff88821b672150 of 8 bytes by task 16493 on cpu 0:
 page_counter_try_charge+0x77/0x170 mm/page_counter.c:139
 try_charge+0x17f/0xbe0 mm/memcontrol.c:2405
 mem_cgroup_try_charge+0xd7/0x260 mm/memcontrol.c:6367
 mem_cgroup_try_charge_delay+0x36/0x70 mm/memcontrol.c:6382
 do_huge_pmd_wp_page_fallback+0x132/0xfc0 mm/huge_memory.c:1232
 do_huge_pmd_wp_page+0xed9/0x1a20 mm/huge_memory.c:1390
 wp_huge_pmd mm/memory.c:3934 [inline]
 __handle_mm_fault+0x1c47/0x2cf0 mm/memory.c:4153
 handle_mm_fault+0x21c/0x540 mm/memory.c:4200
 do_user_addr_fault arch/x86/mm/fault.c:1442 [inline]
 do_page_fault+0x4a4/0xa52 arch/x86/mm/fault.c:1517
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203

read to 0xffff88821b672150 of 8 bytes by task 16491 on cpu 1:
 page_counter_charge+0x55/0xb0 mm/page_counter.c:85
 mem_cgroup_migrate+0xbf/0x200 mm/memcontrol.c:6659
 migrate_page_states+0x52f/0x8f0 mm/migrate.c:652
 migrate_page_copy+0x27d/0x990 mm/migrate.c:663
 migrate_page+0xef/0x150 mm/migrate.c:691
 move_to_new_page+0x17b/0x3d0 mm/migrate.c:942
 __unmap_and_move mm/migrate.c:1117 [inline]
 unmap_and_move mm/migrate.c:1194 [inline]
 migrate_pages+0x1381/0x1930 mm/migrate.c:1423
 do_mbind+0x8df/0x9f0 mm/mempolicy.c:1317
 kernel_mbind+0x10e/0x130 mm/mempolicy.c:1438
 __do_sys_mbind mm/mempolicy.c:1445 [inline]
 __se_sys_mbind mm/mempolicy.c:1441 [inline]
 __x64_sys_mbind+0x7e/0xa0 mm/mempolicy.c:1441
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16491 Comm: syz-executor.4 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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