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Issue #16096: Fix several occurrences of potential signed integer overflow. Thanks Serhiy Storchaka.

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This commit is contained in:
Mark Dickinson 2012-10-06 18:04:49 +01:00
parent a2028733ef
commit c04ddff290
7 changed files with 30 additions and 35 deletions
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3
Modules/_randommodule.c
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@ -284,7 +284,8 @@ random_seed(RandomObject *self, PyObject *args)
n = newn;
if (keyused >= keymax) {
unsigned long bigger = keymax << 1;
if ((bigger >> 1) != keymax) {
if ((bigger >> 1) != keymax ||
bigger > PY_SSIZE_T_MAX / sizeof(*key)) {
PyErr_NoMemory();
goto Done;
}