diff options
| author | Christian Ehrlicher <ch.ehrlicher@gmx.de> | 2019-10-06 12:56:34 +0200 |
|---|---|---|
| committer | Christian Ehrlicher <ch.ehrlicher@gmx.de> | 2019-10-15 13:37:42 +0200 |
| commit | ed7dd9a6edd7afd8798751c8b1d3ee7802ae253f (patch) | |
| tree | 642dffad5d18cbad3f7bf723d89af0ab6874b50f /src | |
| parent | 2ec93e29f75e0cb37650255d478b8e3a9da4dc25 (diff) | |
QODBC: Fix crash when a prepared statement is deleted after the db was removed
When a prepared statement is still alive after the database was removed
with QSqlDatabase::removeDatabase(), the cleanup routine is trying to
access the driver which is no longer alive which results in a crash.
Fixes: QTBUG-79019
Change-Id: I4630e3b947a12b23ed062f015abc373fc0e246c1
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/sqldrivers/odbc/qsql_odbc.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp index 7f98efccba..7709b13cd1 100644 --- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp +++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp @@ -221,18 +221,18 @@ public: int disconnectCount; bool hasSQLFetchScroll; - bool isStmtHandleValid(); + bool isStmtHandleValid() const; void updateStmtHandleState(); }; -bool QODBCResultPrivate::isStmtHandleValid() +bool QODBCResultPrivate::isStmtHandleValid() const { - return disconnectCount == drv_d_func()->disconnectCount; + return drv_d_func() && disconnectCount == drv_d_func()->disconnectCount; } void QODBCResultPrivate::updateStmtHandleState() { - disconnectCount = drv_d_func()->disconnectCount; + disconnectCount = drv_d_func() ? drv_d_func()->disconnectCount : 0; } static QString qWarnODBCHandle(int handleType, SQLHANDLE handle, int *nativeCode = 0) @@ -975,7 +975,7 @@ QODBCResult::QODBCResult(const QODBCDriver *db) QODBCResult::~QODBCResult() { Q_D(QODBCResult); - if (d->hStmt && d->isStmtHandleValid() && driver()->isOpen()) { + if (d->hStmt && d->isStmtHandleValid() && driver() && driver()->isOpen()) { SQLRETURN r = SQLFreeHandle(SQL_HANDLE_STMT, d->hStmt); if (r != SQL_SUCCESS) qSqlWarning(QLatin1String("QODBCDriver: Unable to free statement handle ") |