Fix get out of bounds index in QSortFilterProxyModel::filterAcceptsRow

Before calling the index function, we need to check the validity of the parameters.

Fixes: QTBUG-91878
Pick-to: 5.15 6.0 6.1
Change-Id: I9ec7265fff3f81b8a288c4ba8fae606a2ec808a6
Reviewed-by: David Faure <david.faure@kdab.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/auto/corelib/itemmodels/qconcatenatetablesproxymodel/tst_qconcatenatetablesproxymodel.cpp b/tests/auto/corelib/itemmodels/qconcatenatetablesproxymodel/tst_qconcatenatetablesproxymodel.cpp
index e1ea7a4552..90972caa57 100644
--- a/tests/auto/corelib/itemmodels/qconcatenatetablesproxymodel/tst_qconcatenatetablesproxymodel.cpp
+++ b/tests/auto/corelib/itemmodels/qconcatenatetablesproxymodel/tst_qconcatenatetablesproxymodel.cpp
@@ -117,6 +117,7 @@ private Q_SLOTS:
     void shouldPropagateDropAfterLastRow_data();
     void shouldPropagateDropAfterLastRow();
     void qtbug91788();
+    void qtbug91878();
 
 private:
     QStandardItemModel mod;
@@ -843,6 +844,22 @@ void tst_QConcatenateTablesProxyModel::qtbug91788()
     QCOMPARE(proxyConcat.columnCount(), 0);
 }
 
+void tst_QConcatenateTablesProxyModel::qtbug91878()
+{
+    QStandardItemModel m;
+    m.setRowCount(4);
+    m.setColumnCount(4);
+
+    QConcatenateTablesProxyModel pm;
+    QSortFilterProxyModel proxyFilter;
+    proxyFilter.setSourceModel(&pm);
+    proxyFilter.setFilterFixedString("something");
+    pm.addSourceModel(&m);  // This should not assert
+
+    QCOMPARE(pm.columnCount(), 4);
+    QCOMPARE(pm.rowCount(), 4);
+}
+
 QTEST_GUILESS_MAIN(tst_QConcatenateTablesProxyModel)
 
 #include "tst_qconcatenatetablesproxymodel.moc"