+++ /dev/null
-From c347cbe694743cee120457aa6626712f7799a932 Mon Sep 17 00:00:00 2001
-From: "Miss Islington (bot)"
- <31488909+miss-islington@users.noreply.github.com>
-Date: Mon, 18 Jan 2021 13:29:31 -0800
-Subject: [PATCH] closes bpo-42938: Replace snprintf with Python unicode
- formatting in ctypes param reprs. (GH-24247)
-
-(cherry picked from commit 916610ef90a0d0761f08747f7b0905541f0977c7)
-
-Co-authored-by: Benjamin Peterson <benjamin@python.org>
-
-Co-authored-by: Benjamin Peterson <benjamin@python.org>
-Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
----
- Lib/ctypes/test/test_parameters.py | 43 ++++++++++++++++
- .../2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst | 2 +
- Modules/_ctypes/callproc.c | 51 +++++++------------
- 3 files changed, 64 insertions(+), 32 deletions(-)
- create mode 100644 Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-
-diff --git a/Lib/ctypes/test/test_parameters.py b/Lib/ctypes/test/test_parameters.py
-index e4c25fd880..531894fdec 100644
---- a/Lib/ctypes/test/test_parameters.py
-+++ b/Lib/ctypes/test/test_parameters.py
-@@ -201,6 +201,49 @@ class SimpleTypesTestCase(unittest.TestCase):
- with self.assertRaises(ZeroDivisionError):
- WorseStruct().__setstate__({}, b'foo')
-
-+ def test_parameter_repr(self):
-+ from ctypes import (
-+ c_bool,
-+ c_char,
-+ c_wchar,
-+ c_byte,
-+ c_ubyte,
-+ c_short,
-+ c_ushort,
-+ c_int,
-+ c_uint,
-+ c_long,
-+ c_ulong,
-+ c_longlong,
-+ c_ulonglong,
-+ c_float,
-+ c_double,
-+ c_longdouble,
-+ c_char_p,
-+ c_wchar_p,
-+ c_void_p,
-+ )
-+ self.assertRegex(repr(c_bool.from_param(True)), r"^<cparam '\?' at 0x[A-Fa-f0-9]+>$")
-+ self.assertEqual(repr(c_char.from_param(97)), "<cparam 'c' ('a')>")
-+ self.assertRegex(repr(c_wchar.from_param('a')), r"^<cparam 'u' at 0x[A-Fa-f0-9]+>$")
-+ self.assertEqual(repr(c_byte.from_param(98)), "<cparam 'b' (98)>")
-+ self.assertEqual(repr(c_ubyte.from_param(98)), "<cparam 'B' (98)>")
-+ self.assertEqual(repr(c_short.from_param(511)), "<cparam 'h' (511)>")
-+ self.assertEqual(repr(c_ushort.from_param(511)), "<cparam 'H' (511)>")
-+ self.assertRegex(repr(c_int.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
-+ self.assertRegex(repr(c_uint.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
-+ self.assertRegex(repr(c_long.from_param(20000)), r"^<cparam '[li]' \(20000\)>$")
-+ self.assertRegex(repr(c_ulong.from_param(20000)), r"^<cparam '[LI]' \(20000\)>$")
-+ self.assertRegex(repr(c_longlong.from_param(20000)), r"^<cparam '[liq]' \(20000\)>$")
-+ self.assertRegex(repr(c_ulonglong.from_param(20000)), r"^<cparam '[LIQ]' \(20000\)>$")
-+ self.assertEqual(repr(c_float.from_param(1.5)), "<cparam 'f' (1.5)>")
-+ self.assertEqual(repr(c_double.from_param(1.5)), "<cparam 'd' (1.5)>")
-+ self.assertEqual(repr(c_double.from_param(1e300)), "<cparam 'd' (1e+300)>")
-+ self.assertRegex(repr(c_longdouble.from_param(1.5)), r"^<cparam ('d' \(1.5\)|'g' at 0x[A-Fa-f0-9]+)>$")
-+ self.assertRegex(repr(c_char_p.from_param(b'hihi')), "^<cparam 'z' \(0x[A-Fa-f0-9]+\)>$")
-+ self.assertRegex(repr(c_wchar_p.from_param('hihi')), "^<cparam 'Z' \(0x[A-Fa-f0-9]+\)>$")
-+ self.assertRegex(repr(c_void_p.from_param(0x12)), r"^<cparam 'P' \(0x0*12\)>$")
-+
- ################################################################
-
- if __name__ == '__main__':
-diff --git a/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst b/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-new file mode 100644
-index 0000000000..7df65a156f
---- /dev/null
-+++ b/Misc/NEWS.d/next/Security/2021-01-18-09-27-31.bpo-42938.4Zn4Mp.rst
-@@ -0,0 +1,2 @@
-+Avoid static buffers when computing the repr of :class:`ctypes.c_double` and
-+:class:`ctypes.c_longdouble` values.
-diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
-index b0a36a3024..f2506de544 100644
---- a/Modules/_ctypes/callproc.c
-+++ b/Modules/_ctypes/callproc.c
-@@ -489,58 +489,47 @@ is_literal_char(unsigned char c)
- static PyObject *
- PyCArg_repr(PyCArgObject *self)
- {
-- char buffer[256];
- switch(self->tag) {
- case 'b':
- case 'B':
-- sprintf(buffer, "<cparam '%c' (%d)>",
-+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
- self->tag, self->value.b);
-- break;
- case 'h':
- case 'H':
-- sprintf(buffer, "<cparam '%c' (%d)>",
-+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
- self->tag, self->value.h);
-- break;
- case 'i':
- case 'I':
-- sprintf(buffer, "<cparam '%c' (%d)>",
-+ return PyUnicode_FromFormat("<cparam '%c' (%d)>",
- self->tag, self->value.i);
-- break;
- case 'l':
- case 'L':
-- sprintf(buffer, "<cparam '%c' (%ld)>",
-+ return PyUnicode_FromFormat("<cparam '%c' (%ld)>",
- self->tag, self->value.l);
-- break;
-
- case 'q':
- case 'Q':
-- sprintf(buffer,
--#ifdef MS_WIN32
-- "<cparam '%c' (%I64d)>",
--#else
-- "<cparam '%c' (%lld)>",
--#endif
-+ return PyUnicode_FromFormat("<cparam '%c' (%lld)>",
- self->tag, self->value.q);
-- break;
- case 'd':
-- sprintf(buffer, "<cparam '%c' (%f)>",
-- self->tag, self->value.d);
-- break;
-- case 'f':
-- sprintf(buffer, "<cparam '%c' (%f)>",
-- self->tag, self->value.f);
-- break;
--
-+ case 'f': {
-+ PyObject *f = PyFloat_FromDouble((self->tag == 'f') ? self->value.f : self->value.d);
-+ if (f == NULL) {
-+ return NULL;
-+ }
-+ PyObject *result = PyUnicode_FromFormat("<cparam '%c' (%R)>", self->tag, f);
-+ Py_DECREF(f);
-+ return result;
-+ }
- case 'c':
- if (is_literal_char((unsigned char)self->value.c)) {
-- sprintf(buffer, "<cparam '%c' ('%c')>",
-+ return PyUnicode_FromFormat("<cparam '%c' ('%c')>",
- self->tag, self->value.c);
- }
- else {
-- sprintf(buffer, "<cparam '%c' ('\\x%02x')>",
-+ return PyUnicode_FromFormat("<cparam '%c' ('\\x%02x')>",
- self->tag, (unsigned char)self->value.c);
- }
-- break;
-
- /* Hm, are these 'z' and 'Z' codes useful at all?
- Shouldn't they be replaced by the functionality of c_string
-@@ -549,22 +538,20 @@ PyCArg_repr(PyCArgObject *self)
- case 'z':
- case 'Z':
- case 'P':
-- sprintf(buffer, "<cparam '%c' (%p)>",
-+ return PyUnicode_FromFormat("<cparam '%c' (%p)>",
- self->tag, self->value.p);
- break;
-
- default:
- if (is_literal_char((unsigned char)self->tag)) {
-- sprintf(buffer, "<cparam '%c' at %p>",
-+ return PyUnicode_FromFormat("<cparam '%c' at %p>",
- (unsigned char)self->tag, (void *)self);
- }
- else {
-- sprintf(buffer, "<cparam 0x%02x at %p>",
-+ return PyUnicode_FromFormat("<cparam 0x%02x at %p>",
- (unsigned char)self->tag, (void *)self);
- }
-- break;
- }
-- return PyUnicode_FromString(buffer);
- }
-
- static PyMemberDef PyCArgType_members[] = {
---
-2.20.1
-
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