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Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise

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OverflowError when an argument of %c format is out of range.
This commit is contained in:
Serhiy Storchaka 2013-06-23 20:12:14 +03:00
parent 36a7e4f74a
commit 8eeae2126c
3 changed files with 12 additions and 2 deletions
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2
Lib/test/test_unicode.py
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@ -2024,6 +2024,8 @@ def PyUnicode_FromFormat(format, *args):
# test "%c"
self.assertEqual(PyUnicode_FromFormat(b'%c', c_int(0xabcd)), '\uabcd')
self.assertEqual(PyUnicode_FromFormat(b'%c', c_int(0x10ffff)), '\U0010ffff')
with self.assertRaises(OverflowError):
PyUnicode_FromFormat(b'%c', c_int(0x110000))
# Issue #18183
self.assertEqual(
PyUnicode_FromFormat(b'%c%c', c_int(0x10000), c_int(0x100000)),

3
Misc/NEWS
View file

@ -12,6 +12,9 @@ What's New in Python 3.3.3 release candidate 1?
Core and Builtins
-----------------
- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
OverflowError when an argument of %c format is out of range.
- Issue #18137: Detect integer overflow on precision in float.__format__()
and complex.__format__().

9
Objects/unicodeobject.c
View file

@ -2489,8 +2489,13 @@ PyUnicode_FromFormatV(const char *format, va_list vargs)
switch (*f) {
case 'c':
{
Py_UCS4 ordinal = va_arg(count, int);
maxchar = Py_MAX(maxchar, ordinal);
int ordinal = va_arg(count, int);
if (ordinal < 0 || ordinal > MAX_UNICODE) {
PyErr_SetString(PyExc_OverflowError,
"%c arg not in range(0x110000)");
goto fail;
}
maxchar = Py_MAX(maxchar, (Py_UCS4)ordinal);
n++;
break;
}