ntdll: Use correct output buffer size in RtlpNtEnumerateSubKey.

Signed-off-by: Torge Matthies <tmatthies@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

ntdll: Use correct output buffer size in RtlpNtEnumerateSubKey.
cf7cb993 · Torge Matthies · Alexandre Julliard · fd5c680a · cf7cb993
Commit cf7cb993 authored May 01, 2022 by Torge Matthies Committed by Alexandre Julliard May 20, 2022
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reg.c dlls/ntdll/reg.c +3 -3

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--- a/dlls/ntdll/reg.c
+++ b/dlls/ntdll/reg.c
@@ -91,9 +91,9 @@ NTSTATUS WINAPI RtlpNtEnumerateSubKey( HANDLE handle, UNICODE_STRING *out, ULONG
  DWORD dwLen, dwResultLen;
  NTSTATUS ret;

-  if (out->Length)
+  if (out->MaximumLength)
  {
-    dwLen = out->Length + sizeof(KEY_BASIC_INFORMATION);
+    dwLen = out->MaximumLength + sizeof(KEY_BASIC_INFORMATION);
    info = RtlAllocateHeap( GetProcessHeap(), 0, dwLen );
    if (!info)
      return STATUS_NO_MEMORY;
@@ -111,7 +111,7 @@ NTSTATUS WINAPI RtlpNtEnumerateSubKey( HANDLE handle, UNICODE_STRING *out, ULONG
    out->Length = dwResultLen;
  else if (!ret)
  {
-    if (out->Length < info->NameLength)
+    if (out->MaximumLength < info->NameLength)
    {
      out->Length = dwResultLen;
      ret = STATUS_BUFFER_OVERFLOW;