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Issue #16096: Merge fixes from 3.3.

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This commit is contained in:
Mark Dickinson 2012-10-06 18:05:14 +01:00
commit ff9c54aca2
7 changed files with 30 additions and 35 deletions
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12
Objects/tupleobject.c
View file

@ -96,15 +96,11 @@ PyTuple_New(register Py_ssize_t size)
else
#endif
{
Py_ssize_t nbytes = size * sizeof(PyObject *);
/* Check for overflow */
if (nbytes / sizeof(PyObject *) != (size_t)size ||
(nbytes > PY_SSIZE_T_MAX - sizeof(PyTupleObject) - sizeof(PyObject *)))
{
if (size > (PY_SSIZE_T_MAX - sizeof(PyTupleObject) -
sizeof(PyObject *)) / sizeof(PyObject *)) {
return PyErr_NoMemory();
}
/* nbytes += sizeof(PyTupleObject) - sizeof(PyObject *); */
op = PyObject_GC_NewVar(PyTupleObject, &PyTuple_Type, size);
if (op == NULL)
return NULL;
@ -481,9 +477,9 @@ tuplerepeat(PyTupleObject *a, Py_ssize_t n)
if (Py_SIZE(a) == 0)
return PyTuple_New(0);
}
size = Py_SIZE(a) * n;
if (size/Py_SIZE(a) != n)
if (n > PY_SSIZE_T_MAX / Py_SIZE(a))
return PyErr_NoMemory();
size = Py_SIZE(a) * n;
np = (PyTupleObject *) PyTuple_New(size);
if (np == NULL)
return NULL;

23
Objects/unicodeobject.c
View file

@ -4528,7 +4528,6 @@ _PyUnicode_EncodeUTF7(PyObject *str,
void *data;
Py_ssize_t len;
PyObject *v;
Py_ssize_t allocated;
int inShift = 0;
Py_ssize_t i;
unsigned int base64bits = 0;
@ -4546,11 +4545,9 @@ _PyUnicode_EncodeUTF7(PyObject *str,
return PyBytes_FromStringAndSize(NULL, 0);
/* It might be possible to tighten this worst case */
allocated = 8 * len;
if (allocated / 8 != len)
if (len > PY_SSIZE_T_MAX / 8)
return PyErr_NoMemory();
v = PyBytes_FromStringAndSize(NULL, allocated);
v = PyBytes_FromStringAndSize(NULL, len * 8);
if (v == NULL)
return NULL;
@ -5128,7 +5125,7 @@ _PyUnicode_EncodeUTF32(PyObject *str,
Py_ssize_t len;
PyObject *v;
unsigned char *p;
Py_ssize_t nsize, bytesize, i;
Py_ssize_t nsize, i;
/* Offsets from p for storing byte pairs in the right order. */
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
int iorder[] = {0, 1, 2, 3};
@ -5156,10 +5153,9 @@ _PyUnicode_EncodeUTF32(PyObject *str,
len = PyUnicode_GET_LENGTH(str);
nsize = len + (byteorder == 0);
bytesize = nsize * 4;
if (bytesize / 4 != nsize)
if (nsize > PY_SSIZE_T_MAX / 4)
return PyErr_NoMemory();
v = PyBytes_FromStringAndSize(NULL, bytesize);
v = PyBytes_FromStringAndSize(NULL, nsize * 4);
if (v == NULL)
return NULL;
@ -10195,7 +10191,7 @@ replace(PyObject *self, PyObject *str1,
}
else {
Py_ssize_t n, i, j, ires;
Py_ssize_t product, new_size;
Py_ssize_t new_size;
int rkind = skind;
char *res;
@ -10227,19 +10223,18 @@ replace(PyObject *self, PyObject *str1,
}
/* new_size = PyUnicode_GET_LENGTH(self) + n * (PyUnicode_GET_LENGTH(str2) -
PyUnicode_GET_LENGTH(str1))); */
product = n * (len2-len1);
if ((product / (len2-len1)) != n) {
if (len2 > len1 && len2 - len1 > (PY_SSIZE_T_MAX - slen) / n) {
PyErr_SetString(PyExc_OverflowError,
"replace string is too long");
goto error;
}
new_size = slen + product;
new_size = slen + n * (len2 - len1);
if (new_size == 0) {
Py_INCREF(unicode_empty);
u = unicode_empty;
goto done;
}
if (new_size < 0 || new_size > (PY_SSIZE_T_MAX >> (rkind-1))) {
if (new_size > (PY_SSIZE_T_MAX >> (rkind-1))) {
PyErr_SetString(PyExc_OverflowError,
"replace string is too long");
goto error;