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BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff888137635448 of 8 bytes by task 9615 on cpu 0:
 __anon_vma_prepare+0x130/0x2c0 mm/rmap.c:210
 anon_vma_prepare include/linux/rmap.h:150 [inline]
 do_anonymous_page+0x7d9/0xad0 mm/memory.c:3824
 handle_pte_fault mm/memory.c:4625 [inline]
 __handle_mm_fault mm/memory.c:4763 [inline]
 handle_mm_fault+0x69f/0xca0 mm/memory.c:4861
 do_user_addr_fault+0x617/0xb90 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30
 user_access_begin arch/x86/include/asm/uaccess.h:445 [inline]
 __do_sys_waitid kernel/exit.c:1630 [inline]
 __se_sys_waitid+0x12c/0x1c0 kernel/exit.c:1613
 __x64_sys_waitid+0x63/0x70 kernel/exit.c:1613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888137635448 of 8 bytes by task 9614 on cpu 1:
 anon_vma_prepare include/linux/rmap.h:147 [inline]
 do_anonymous_page+0x12c/0xad0 mm/memory.c:3824
 handle_pte_fault mm/memory.c:4625 [inline]
 __handle_mm_fault mm/memory.c:4763 [inline]
 handle_mm_fault+0x69f/0xca0 mm/memory.c:4861
 do_user_addr_fault+0x617/0xb90 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30

value changed: 0x0000000000000000 -> 0xffff888105583b90

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9614 Comm: syz-executor.5 Not tainted 5.17.0-syzkaller-14114-g09bb8856d4a7-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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