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Issue #5292: Fixed mmap crash on its boundary access m[len(m)].

This commit is contained in:
Hirokazu Yamamoto 2009-02-17 10:12:10 +00:00
parent f68b5b8046
commit f6bbd0e71d
3 changed files with 8 additions and 2 deletions
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4
Lib/test/test_mmap.py
View File

@ -41,6 +41,10 @@ class MmapTests(unittest.TestCase):
self.assertEqual(m[0], '\0')
self.assertEqual(m[0:3], '\0\0\0')
# Shouldn't crash on boundary (Issue #5292)
self.assertRaises(IndexError, m.__getitem__, len(m))
self.assertRaises(IndexError, m.__setitem__, len(m), '\0')
# Modify the file's content
m[0] = '3'
m[PAGESIZE +3: PAGESIZE +3+3] = 'bar'

2
Misc/NEWS
View File

@ -159,6 +159,8 @@ Core and Builtins
Library
-------
- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
- Issue #2279: distutils.sdist.add_defaults now add files
from the package_data and the data_files metadata.

4
Modules/mmapmodule.c
View File

@ -731,7 +731,7 @@ mmap_subscript(mmap_object *self, PyObject *item)
return NULL;
if (i < 0)
i += self->size;
if (i < 0 || (size_t)i > self->size) {
if (i < 0 || (size_t)i >= self->size) {
PyErr_SetString(PyExc_IndexError,
"mmap index out of range");
return NULL;
@ -872,7 +872,7 @@ mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value)
return -1;
if (i < 0)
i += self->size;
if (i < 0 || (size_t)i > self->size) {
if (i < 0 || (size_t)i >= self->size) {
PyErr_SetString(PyExc_IndexError,
"mmap index out of range");
return -1;