From 15422d191fb03eb9cafe68b24484d59c1270244c Mon Sep 17 00:00:00 2001 From: Marc Mutz Date: Wed, 3 Aug 2022 18:52:13 +0200 Subject: qputenv: defend against non-NUL-terminated QByteArray values MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The old code assumed that a QByteArray's data() is always NUL-terminated. Due to the conflation of owners and non-owners in QByteArray (but also in case we ever get efficient substringing), this is not always the case, e.g. QByteArray::fromRawData() does not ensure NUL-termination. From QString::utf16(), we learn that the condition to check for is QArrayData::isMutable(). After working around the fact that QByteArray::data_ptr() doesn't exist for const QBAs and that empty QBAs always refer to QByteArray::empty_, which is !isMutable(), we can detect this situation and re-allocate without introducing new API. This is the fix for Qt ≤ 6.4. For Qt 6.5, we'll port the function to QByteArrayView. Pick-to: 6.4 6.3 6.2 5.15 Fixes: QTBUG-105302 Change-Id: I3416535ab09d601e0e87b2767f2c024ba1217e64 Reviewed-by: Sona Kurazyan Reviewed-by: Mårten Nordheim --- tests/auto/corelib/global/qgetputenv/tst_qgetputenv.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'tests/auto/corelib/global/qgetputenv') diff --git a/tests/auto/corelib/global/qgetputenv/tst_qgetputenv.cpp b/tests/auto/corelib/global/qgetputenv/tst_qgetputenv.cpp index 77a7fa4194..f914ee5f23 100644 --- a/tests/auto/corelib/global/qgetputenv/tst_qgetputenv.cpp +++ b/tests/auto/corelib/global/qgetputenv/tst_qgetputenv.cpp @@ -60,7 +60,11 @@ void tst_QGetPutEnv::getSetCheck() QCOMPARE(sresult, QString()); #endif - QVERIFY(qputenv(varName, QByteArray("supervalue"))); + constexpr char varValueFullString[] = "supervalue123"; + const auto varValueQBA = QByteArray::fromRawData(varValueFullString, sizeof varValueFullString - 4); + QCOMPARE_EQ(varValueQBA, "supervalue"); + + QVERIFY(qputenv(varName, varValueQBA)); QVERIFY(qEnvironmentVariableIsSet(varName)); QVERIFY(!qEnvironmentVariableIsEmpty(varName)); -- cgit v1.2.3