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Issue #18408: Fix list_ass_slice(), handle list_resize() failure

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I tested the patch manually by injecting a fault using gdb: list items are
correctly restored on failure.
This commit is contained in:
Victor Stinner 2013-07-19 23:06:21 +02:00
parent 9007dd7274
commit 2c40f640d9
1 changed files with 8 additions and 3 deletions
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11
Objects/listobject.c
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@ -644,9 +644,14 @@ list_ass_slice(PyListObject *a, Py_ssize_t ilow, Py_ssize_t ihigh, PyObject *v)
memcpy(recycle, &item[ilow], s);
if (d < 0) { /* Delete -d items */
memmove(&item[ihigh+d], &item[ihigh],
(Py_SIZE(a) - ihigh)*sizeof(PyObject *));
list_resize(a, Py_SIZE(a) + d);
Py_ssize_t tail;
tail = (Py_SIZE(a) - ihigh) * sizeof(PyObject *);
memmove(&item[ihigh+d], &item[ihigh], tail);
if (list_resize(a, Py_SIZE(a) + d) < 0) {
memmove(&item[ihigh], &item[ihigh+d], tail);
memcpy(&item[ilow], recycle, s);
goto Error;
}
item = a->ob_item;
}
else if (d > 0) { /* Insert d items */