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BUG: KCSAN: data-race in page_counter_try_charge / page_counter_try_charge

write to 0xffff88821b673158 of 8 bytes by task 5082 on cpu 0:
 page_counter_try_charge+0x23d/0x480 mm/page_counter.c:134
 try_charge+0x1a1/0xb00 mm/memcontrol.c:2467
 mem_cgroup_charge+0xbe/0x450 mm/memcontrol.c:6497
 do_anonymous_page+0x22f/0xec0 mm/memory.c:3378
 handle_pte_fault mm/memory.c:4223 [inline]
 __handle_mm_fault mm/memory.c:4357 [inline]
 handle_mm_fault+0x1371/0x1930 mm/memory.c:4394
 do_user_addr_fault+0x393/0x810 arch/x86/mm/fault.c:1295
 handle_page_fault arch/x86/mm/fault.c:1365 [inline]
 exc_page_fault+0xb8/0x330 arch/x86/mm/fault.c:1418
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565

read to 0xffff88821b673158 of 8 bytes by task 9312 on cpu 1:
 page_counter_try_charge+0x21c/0x480 mm/page_counter.c:133
 try_charge+0x1a1/0xb00 mm/memcontrol.c:2467
 __memcg_kmem_charge mm/memcontrol.c:2902 [inline]
 __memcg_kmem_charge_page+0x15c/0x280 mm/memcontrol.c:2957
 __alloc_pages_nodemask+0x266/0x390 mm/page_alloc.c:4867
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2292
 alloc_pages include/linux/gfp.h:545 [inline]
 __pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
 pte_alloc_one+0x13/0x50 arch/x86/mm/pgtable.c:33
 __pte_alloc+0x1d/0x1f0 mm/memory.c:425
 copy_pte_range+0x1083/0x1430 mm/memory.c:825
 copy_pmd_range mm/memory.c:901 [inline]
 copy_pud_range mm/memory.c:935 [inline]
 copy_p4d_range mm/memory.c:957 [inline]
 copy_page_range+0x999/0xbc0 mm/memory.c:1019
 dup_mmap+0x703/0x9c0 kernel/fork.c:609
 dup_mm+0x7c/0x210 kernel/fork.c:1371
 copy_mm kernel/fork.c:1427 [inline]
 copy_process+0x1799/0x3300 kernel/fork.c:2098
 _do_fork+0xf1/0x660 kernel/fork.c:2443
 __do_sys_clone kernel/fork.c:2599 [inline]
 __se_sys_clone kernel/fork.c:2580 [inline]
 __x64_sys_clone+0xfb/0x120 kernel/fork.c:2580
 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9312 Comm: syz-executor.5 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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