[PATCH 2/4] kernelbase: LoadLibraryEx enforce valid flag combinations

[Dāvis Mosāns]

From: Dāvis Mosāns

---
 dlls/kernelbase/loader.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/dlls/kernelbase/loader.c b/dlls/kernelbase/loader.c
index 59b91596f13..7aff6bb9412 100644
--- a/dlls/kernelbase/loader.c
+++ b/dlls/kernelbase/loader.c
@@ -531,11 +531,25 @@ HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExW( LPCWSTR name, HANDLE file, DWOR
     UNICODE_STRING str;
     HMODULE module;

-    if (!name)
+    if (!name || file)
     {
+        // file must be NULL
         SetLastError( ERROR_INVALID_PARAMETER );
         return 0;
     }
+
+    if ((flags & LOAD_LIBRARY_AS_DATAFILE) && (flags & LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE)) {
+        // Mutually exclusive
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return 0;
+    }
+
+    if ((flags & LOAD_LIBRARY_SEARCH_DEFAULT_DIRS) && (flags & LOAD_WITH_ALTERED_SEARCH_PATH)) {
+        // Can't mix default dirs with altered path
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return 0;
+    }
+
     RtlInitUnicodeString( &str, name );
     if (str.Buffer[str.Length/sizeof(WCHAR) - 1] != ' ') return load_library( &str, flags );