3 files changed, 3 insertions, 9 deletions
diff --git a/src/corelib/io/qfilesystemengine_symbian.cpp b/src/corelib/io/qfilesystemengine_symbian.cpp
index 18c52cbb17..c8c1dfdc84 100644
--- a/src/corelib/io/qfilesystemengine_symbian.cpp
+++ b/src/corelib/io/qfilesystemengine_symbian.cpp
@@ -114,9 +114,7 @@ QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 {
     QString orig = entry.filePath();
     const bool isAbsolute = entry.isAbsolute();
-    const bool isDirty = (orig.contains(QLatin1String("/../")) || orig.contains(QLatin1String("/./")) ||
-            orig.contains(QLatin1String("//")) ||
-            orig.endsWith(QLatin1String("/..")) || orig.endsWith(QLatin1String("/.")));
+    const bool isDirty = !entry.isClean();
     if (isAbsolute && !isDirty)
         return entry;
 
diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index f1e0758bbe..966daba021 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -218,7 +218,7 @@ QFileSystemEntry QFileSystemEngine::canonicalName(const QFileSystemEntry &entry,
 //static
 QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 {
-    if (entry.isAbsolute())
+    if (entry.isAbsolute() && entry.isClean())
         return entry;
 
     QByteArray orig = entry.nativeFilePath();
diff --git a/src/corelib/io/qfilesystemengine_win.cpp b/src/corelib/io/qfilesystemengine_win.cpp
index f704fc3e90..df34184091 100644
--- a/src/corelib/io/qfilesystemengine_win.cpp
+++ b/src/corelib/io/qfilesystemengine_win.cpp
@@ -508,11 +508,7 @@ QFileSystemEntry QFileSystemEngine::absoluteName(const QFileSystemEntry &entry)
 
     if (!entry.isRelative()) {
 #if !defined(Q_OS_WINCE)
-        if (entry.isAbsolute()
-            && !entry.filePath().contains(QLatin1String("/../"))
-            && !entry.filePath().contains(QLatin1String("/./"))
-            && !entry.filePath().endsWith(QLatin1String("/.."))
-            && !entry.filePath().endsWith(QLatin1String("/."))) {
+        if (entry.isAbsolute() && entry.isClean()) {
             ret = entry.filePath();
         }  else {
             ret = QDir::fromNativeSeparators(nativeAbsoluteFilePath(entry.filePath()));