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BUG: KCSAN: data-race in __anon_vma_prepare / handle_mm_fault

write to 0xffff88815f5d3ee0 of 8 bytes by task 31037 on cpu 0:
 __anon_vma_prepare+0x147/0x2b0 mm/rmap.c:214
 vmf_anon_prepare mm/memory.c:3072 [inline]
 wp_page_copy mm/memory.c:3110 [inline]
 do_wp_page+0x1593/0x1f40 mm/memory.c:3511
 handle_pte_fault mm/memory.c:5055 [inline]
 __handle_mm_fault mm/memory.c:5180 [inline]
 handle_mm_fault+0xe5d/0x2dd0 mm/memory.c:5345
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2f7/0x6c0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86
 netlink_getsockopt+0x3aa/0x3e0 net/netlink/af_netlink.c:1779
 do_sock_getsockopt net/socket.c:2373 [inline]
 __sys_getsockopt+0x1bf/0x230 net/socket.c:2402
 __do_sys_getsockopt net/socket.c:2412 [inline]
 __se_sys_getsockopt net/socket.c:2409 [inline]
 __x64_sys_getsockopt+0x66/0x80 net/socket.c:2409
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88815f5d3ee0 of 8 bytes by task 31036 on cpu 1:
 anon_vma_prepare include/linux/rmap.h:156 [inline]
 do_anonymous_page mm/memory.c:4170 [inline]
 do_pte_missing mm/memory.c:3729 [inline]
 handle_pte_fault mm/memory.c:5039 [inline]
 __handle_mm_fault mm/memory.c:5180 [inline]
 handle_mm_fault+0xeb8/0x2dd0 mm/memory.c:5345
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2f7/0x6c0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x0000000000000000 -> 0xffff8882222b2340

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 31036 Comm: syz-executor.5 Not tainted 6.7.0-rc5-syzkaller-00214-gc8e97fc6b4c0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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