1 files changed, 6 insertions, 0 deletions
diff --git a/src/quick/items/qquicktextinput.cpp b/src/quick/items/qquicktextinput.cpp
index a52cd81ef3..5f6fd8f50f 100644
--- a/src/quick/items/qquicktextinput.cpp
+++ b/src/quick/items/qquicktextinput.cpp
@@ -1242,6 +1242,12 @@ void QQuickTextInput::setEchoMode(QQuickTextInput::EchoMode echo)
     d->updateDisplayText();
     updateCursorRectangle();
 
+    // If this control is used for password input, we want to minimize
+    // the possibility of string reallocation not to leak (parts of)
+    // the password.
+    if (d->m_echoMode != QQuickTextInput::Normal)
+        d->m_text.reserve(30);
+
     emit echoModeChanged(echoMode());
 }