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Add checks for size overflow on list*n, list+list, tuple+tuple. 

Will backport.
This commit is contained in:
Guido van Rossum 2002-10-11 21:05:56 +00:00
parent 6e08c1460c
commit a5c0e6d6c8
2 changed files with 6 additions and 0 deletions
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4
Objects/listobject.c
View File

@ -391,6 +391,8 @@ list_concat(PyListObject *a, PyObject *bb)
}
#define b ((PyListObject *)bb)
size = a->ob_size + b->ob_size;
if (size < 0)
return PyErr_NoMemory();
np = (PyListObject *) PyList_New(size);
if (np == NULL) {
return NULL;
@ -419,6 +421,8 @@ list_repeat(PyListObject *a, int n)
if (n < 0)
n = 0;
size = a->ob_size * n;
if (size/a->ob_size != n)
return PyErr_NoMemory();
np = (PyListObject *) PyList_New(size);
if (np == NULL)
return NULL;

2
Objects/tupleobject.c
View File

@ -330,6 +330,8 @@ tupleconcat(register PyTupleObject *a, register PyObject *bb)
}
#define b ((PyTupleObject *)bb)
size = a->ob_size + b->ob_size;
if (size < 0)
return PyErr_NoMemory();
np = (PyTupleObject *) PyTuple_New(size);
if (np == NULL) {
return NULL;