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BUG: KCSAN: data-race in page_counter_try_charge / page_counter_try_charge

write to 0xffff88821b672150 of 8 bytes by task 15979 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_anonymous_page mm/memory.c:3190 [inline]
 handle_pte_fault mm/memory.c:4031 [inline]
 __handle_mm_fault+0x18f1/0x2cf0 mm/memory.c:4163
 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 15939 on cpu 1:
 page_counter_try_charge+0x56/0x170 mm/page_counter.c:138
 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+0x424/0x1a20 mm/huge_memory.c:1401
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15939 Comm: syz-executor.2 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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