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BUG: KCSAN: data-race in __anon_vma_prepare / do_anonymous_page

write to 0xffff888103211178 of 8 bytes by task 26193 on cpu 0:
 __anon_vma_prepare+0x148/0x2c0 mm/rmap.c:213
 anon_vma_prepare include/linux/rmap.h:159 [inline]
 do_anonymous_page+0x784/0x9c0 mm/memory.c:4072
 handle_pte_fault mm/memory.c:4929 [inline]
 __handle_mm_fault mm/memory.c:5073 [inline]
 handle_mm_fault+0x8dc/0xb20 mm/memory.c:5219
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
 copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:232
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
 _copy_to_user+0x72/0x90 lib/usercopy.c:34
 copy_to_user include/linux/uaccess.h:169 [inline]
 do_pipe2+0x8c/0x120 fs/pipe.c:1012
 __do_sys_pipe fs/pipe.c:1033 [inline]
 __se_sys_pipe fs/pipe.c:1031 [inline]
 __x64_sys_pipe+0x1d/0x30 fs/pipe.c:1031
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888103211178 of 8 bytes by task 26192 on cpu 1:
 anon_vma_prepare include/linux/rmap.h:156 [inline]
 do_anonymous_page+0x123/0x9c0 mm/memory.c:4072
 handle_pte_fault mm/memory.c:4929 [inline]
 __handle_mm_fault mm/memory.c:5073 [inline]
 handle_mm_fault+0x8dc/0xb20 mm/memory.c:5219
 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428
 handle_page_fault arch/x86/mm/fault.c:1519 [inline]
 exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
 __put_user_4+0x12/0x20 arch/x86/lib/putuser.S:93
 __sys_socketpair+0xb6/0x420 net/socket.c:1685
 __do_sys_socketpair net/socket.c:1751 [inline]
 __se_sys_socketpair net/socket.c:1748 [inline]
 __x64_sys_socketpair+0x4e/0x60 net/socket.c:1748
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000000000 -> 0xffff888103230a20

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 26192 Comm: syz-executor.3 Not tainted 6.2.0-rc1-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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