1 files changed, 77 insertions, 0 deletions
diff --git a/qtbug-95639.patch b/qtbug-95639.patch
new file mode 100644
index 000000000000..1235a9fd24f0
--- /dev/null
+++ b/qtbug-95639.patch
@@ -0,0 +1,77 @@
+diff --git a/src/plugins/sqldrivers/mysql/qsql_mysql.cpp b/src/plugins/sqldrivers/mysql/qsql_mysql.cpp
+index a641935dc5..b1cf4548d1 100644
+--- a/src/plugins/sqldrivers/mysql/qsql_mysql.cpp
++++ b/src/plugins/sqldrivers/mysql/qsql_mysql.cpp
+@@ -209,7 +209,7 @@ public:
+     struct QMyField
+     {
+         char *outField = nullptr;
+-        MYSQL_FIELD *myField = nullptr;
++        const MYSQL_FIELD *myField = nullptr;
+         QMetaType::Type type = QMetaType::UnknownType;
+         my_bool nullIndicator = false;
+         ulong bufLength = 0ul;
+@@ -346,14 +346,10 @@ static bool qIsInteger(int t)
+ 
+ void QMYSQLResultPrivate::bindBlobs()
+ {
+-    int i;
+-    MYSQL_FIELD *fieldInfo;
+-    MYSQL_BIND *bind;
+-
+-    for(i = 0; i < fields.count(); ++i) {
+-        fieldInfo = fields.at(i).myField;
++    for(int i = 0; i < fields.count(); ++i) {
++        const MYSQL_FIELD *fieldInfo = fields.at(i).myField;
+         if (qIsBlob(inBinds[i].buffer_type) && meta && fieldInfo) {
+-            bind = &inBinds[i];
++            MYSQL_BIND *bind = &inBinds[i];
+             bind->buffer_length = fieldInfo->max_length;
+             delete[] static_cast<char*>(bind->buffer);
+             bind->buffer = new char[fieldInfo->max_length];
+@@ -378,35 +374,32 @@ bool QMYSQLResultPrivate::bindInValues()
+     inBinds = new MYSQL_BIND[fields.size()];
+     memset(inBinds, 0, fields.size() * sizeof(MYSQL_BIND));
+ 
+-    MYSQL_FIELD *fieldInfo;
++    const MYSQL_FIELD *fieldInfo;
+ 
+     while((fieldInfo = mysql_fetch_field(meta))) {
++        MYSQL_BIND *bind = &inBinds[i];
++
+         QMyField &f = fields[i];
+         f.myField = fieldInfo;
+-
++        bind->buffer_length = f.bufLength = fieldInfo->length + 1;
++        bind->buffer_type = fieldInfo->type;
+         f.type = qDecodeMYSQLType(fieldInfo->type, fieldInfo->flags);
+         if (qIsBlob(fieldInfo->type)) {
+             // the size of a blob-field is available as soon as we call
+             // mysql_stmt_store_result()
+             // after mysql_stmt_exec() in QMYSQLResult::exec()
+-            fieldInfo->length = 0;
++            bind->buffer_length = f.bufLength = 0;
+             hasBlobs = true;
+         } else if (qIsInteger(f.type)) {
+-            fieldInfo->length = 8;
++            bind->buffer_length = f.bufLength = 8;
+         } else {
+-            fieldInfo->type = MYSQL_TYPE_STRING;
++            bind->buffer_type = MYSQL_TYPE_STRING;
+         }
+-        bind = &inBinds[i];
+-        field = new char[fieldInfo->length + 1];
+-        memset(field, 0, fieldInfo->length + 1);
+-
+-        bind->buffer_type = fieldInfo->type;
+-        bind->buffer = field;
+-        bind->buffer_length = f.bufLength = fieldInfo->length + 1;
+         bind->is_null = &f.nullIndicator;
+         bind->length = &f.bufLength;
+         bind->is_unsigned = fieldInfo->flags & UNSIGNED_FLAG ? 1 : 0;
+-        f.outField=field;
++        char *field = new char[bind->buffer_length + 1]{};
++        bind->buffer = f.outField = field;
+ 
+         ++i;
+     }