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bpo-31764: Prevent a crash in sqlite3.Cursor.close() in case the Cursor object is uninitialized (#3958)

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Oren Milman 2017-11-07 02:09:49 +02:00 • committed by Victor Stinner
parent e56ab746a9
commit edb13ae48c
3 changed files with 10 additions and 0 deletions
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3
Lib/sqlite3/test/regression.py
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@ -190,6 +190,9 @@ def __init__(self, con):
cur = Cursor(con) cur = Cursor(con)
with self.assertRaises(sqlite.ProgrammingError): with self.assertRaises(sqlite.ProgrammingError):
cur.execute("select 4+5").fetchall() cur.execute("select 4+5").fetchall()
with self.assertRaisesRegex(sqlite.ProgrammingError,
r'^Base Cursor\.__init__ not called\.$'):
cur.close()
def CheckStrSubclass(self): def CheckStrSubclass(self):
""" """

2
Misc/NEWS.d/next/Library/2017-10-11-22-18-04.bpo-31764.EMyIkK.rst Normal file
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@ -0,0 +1,2 @@
Prevent a crash in ``sqlite3.Cursor.close()`` in case the ``Cursor`` object is
uninitialized. Patch by Oren Milman.

5
Modules/_sqlite/cursor.c
View file

@ -889,6 +889,11 @@ PyObject* pysqlite_noop(pysqlite_Connection* self, PyObject* args)
PyObject* pysqlite_cursor_close(pysqlite_Cursor* self, PyObject* args) PyObject* pysqlite_cursor_close(pysqlite_Cursor* self, PyObject* args)
{ {
if (!self->connection) {
PyErr_SetString(pysqlite_ProgrammingError,
"Base Cursor.__init__ not called.");
return NULL;
}
if (!pysqlite_check_thread(self->connection) || !pysqlite_check_connection(self->connection)) { if (!pysqlite_check_thread(self->connection) || !pysqlite_check_connection(self->connection)) {
return NULL; return NULL;
} }