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BUG: KCSAN: data-race in lock_vma_under_rcu / vma_prepare

write to 0xffff88810347fd48 of 4 bytes by task 3307 on cpu 1:
 vma_start_write include/linux/mm.h:689 [inline]
 vma_prepare+0x85/0x520 mm/mmap.c:509
 vma_expand+0x180/0x340 mm/mmap.c:700
 mmap_region+0x7b6/0x1490 mm/mmap.c:2617
 do_mmap+0x67c/0xaa0 mm/mmap.c:1394
 vm_mmap_pgoff+0x12f/0x240 mm/util.c:543
 ksys_mmap_pgoff+0xc5/0x320 mm/mmap.c:1440
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88810347fd48 of 4 bytes by task 3314 on cpu 0:
 vma_start_read include/linux/mm.h:643 [inline]
 lock_vma_under_rcu+0xcd/0x290 mm/memory.c:5291
 do_user_addr_fault arch/x86/mm/fault.c:1341 [inline]
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x16e/0x780 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x00000167 -> 0x00000168

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3314 Comm: syz-fuzzer Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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