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closes bpo-41533: Fix a potential memory leak when allocating a stack (GH-21847)

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Free the stack allocated in va_build_stack if do_mkstack fails
and the stack is not a small_stack
(cherry picked from commit 75c80b0bda)

Co-authored-by: Tony Solomonik <tony.solomonik@gmail.com>
This commit is contained in:
Miss Islington (bot) 2020-09-04 15:56:04 -07:00 • committed by GitHub
parent 8ed1c177c9
commit 106c1df736
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2 changed files with 5 additions and 0 deletions
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Python/modsupport.c
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@ -619,6 +619,9 @@ va_build_stack(PyObject **small_stack, Py_ssize_t small_stack_len,
va_end(lva);
if (res < 0) {
if (stack != small_stack) {
PyMem_Free(stack);
}
return NULL;
}