File 0001-QSQL-ODBC-fix-regression-trailing-NUL.patch of Package libqt5-qtbase.35117

From 0c19ef0131f1371ea8446cb013088104e1638198 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@qt.io>
Date: Mon, 20 Mar 2023 12:33:02 +0100
Subject: [PATCH] QSQL/ODBC: fix regression (trailing NUL)

When we fixed the callers of toSQLTCHAR() to use the result's size()
instead of the input's (which differ, if sizeof(SQLTCHAR) != 2), we
exposed callers to the append(0), which changes the size() of the
result QVLA. Callers that don't rely on NUL-termination (all?) now saw
an additional training NUL.

Fix by not NUL-terminating, and changing the only user of SQL_NTS to
use an explicit length.

Amends 4c445ef0bae8b36ec4a742552f0ebd81a1a90723 and
46af1fe49f7f419dc1b3231de9860e2da0ea48f8.

Done-with: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Change-Id: I6210b77e9417f46294df94cb32ab4134af8dc4c2
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
(cherry picked from commit 9020034b3b6a3a8118e5959beed699bb8aaa3f95)
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
---
 src/plugins/sqldrivers/odbc/qsql_odbc.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
index 58b220ad3ea9..77fc2e933ac3 100644
--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -125,7 +125,6 @@ inline static QVarLengthArray<SQLTCHAR> toSQLTCHAR(const QString &input)
 {
     QVarLengthArray<SQLTCHAR> result;
     toSQLTCHARImpl(result, input);
-    result.append(0); // make sure it's null terminated, doesn't matter if it already is, it does if it isn't.
     return result;
 }
 
@@ -2111,7 +2110,10 @@ void QODBCDriverPrivate::checkUnicode()
                                   hDbc,
                                   &hStmt);
 
-    r = SQLExecDirect(hStmt, toSQLTCHAR(QLatin1String("select 'test'")).data(), SQL_NTS);
+    {
+        auto encoded = toSQLTCHAR(QLatin1String("select 'test'"));
+        r = SQLExecDirect(hStmt, encoded.data(), SQLINTEGER(encoded.size()));
+    }
     if(r == SQL_SUCCESS) {
         r = SQLFetch(hStmt);
         if(r == SQL_SUCCESS) {
-- 
2.16.3