1 files changed, 31 insertions, 1 deletions
diff --git a/src/corelib/io/qfilesystemengine_p.h b/src/corelib/io/qfilesystemengine_p.h
index 09ec2d6a10..ecfdc03743 100644
--- a/src/corelib/io/qfilesystemengine_p.h
+++ b/src/corelib/io/qfilesystemengine_p.h
@@ -58,6 +58,36 @@
 
 QT_BEGIN_NAMESPACE
 
+#define Q_RETURN_ON_INVALID_FILENAME(message, result) \
+    { \
+        QMessageLogger(QT_MESSAGELOG_FILE, QT_MESSAGELOG_LINE, QT_MESSAGELOG_FUNC).warning(message); \
+        errno = EINVAL; \
+        return (result); \
+    }
+
+inline bool qIsFilenameBroken(const QByteArray &name)
+{
+    return name.contains('\0');
+}
+
+inline bool qIsFilenameBroken(const QString &name)
+{
+    return name.contains(QLatin1Char('\0'));
+}
+
+inline bool qIsFilenameBroken(const QFileSystemEntry &entry)
+{
+    return qIsFilenameBroken(entry.nativeFilePath());
+}
+
+#define Q_CHECK_FILE_NAME(name, result) \
+    do { \
+        if (Q_UNLIKELY((name).isEmpty())) \
+            Q_RETURN_ON_INVALID_FILENAME("Empty filename passed to function", (result)); \
+        if (Q_UNLIKELY(qIsFilenameBroken(name))) \
+            Q_RETURN_ON_INVALID_FILENAME("Broken filename passed to function", (result)); \
+    } while (false)
+
 class QFileSystemEngine
 {
 public:
@@ -130,7 +160,7 @@ public:
     static bool removeFile(const QFileSystemEntry &entry, QSystemError &error);
 
     static bool setPermissions(const QFileSystemEntry &entry, QFile::Permissions permissions, QSystemError &error,
-                               QFileSystemMetaData *data = 0);
+                               QFileSystemMetaData *data = nullptr);
 
     // unused, therefore not implemented
     static bool setFileTime(const QFileSystemEntry &entry, const QDateTime &newDate,