From 5a6e5dc44ba4718662eb27123d8cb4273b369adf Mon Sep 17 00:00:00 2001
From: Alex Blasche <alexander.blasche@digia.com>
Date: Fri, 26 Sep 2014 14:18:20 +0200
Subject: Don't permit write of non-existing or empty data via socket

Change-Id: Ic8387dd411a9784b6163a15d423cdeaa5e63ea30
Reviewed-by: Timur Pocheptsov <Timur.Pocheptsov@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
---
 src/bluetooth/qbluetoothsocket.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/bluetooth/qbluetoothsocket.cpp b/src/bluetooth/qbluetoothsocket.cpp
index f1e5568e..be099622 100644
--- a/src/bluetooth/qbluetoothsocket.cpp
+++ b/src/bluetooth/qbluetoothsocket.cpp
@@ -648,6 +648,13 @@ quint16 QBluetoothSocket::peerPort() const
 qint64 QBluetoothSocket::writeData(const char *data, qint64 maxSize)
 {
     Q_D(QBluetoothSocket);
+
+    if (!data || maxSize <= 0) {
+        d_ptr->errorString = tr("Invalid data/data size");
+        setSocketError(QBluetoothSocket::OperationError);
+        return -1;
+    }
+
     return d->writeData(data, maxSize);
 }
 
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