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gh-99240: Reset pointer to NULL when the pointed memory is freed in argument parsing (#99890)

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Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
This commit is contained in:
colorfulappl 2022-12-17 14:37:44 +08:00 • committed by GitHub
parent 9cdd2fa63b
commit efbb1eb9f5
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4 changed files with 30 additions and 5 deletions
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10
Python/getargs.c
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@ -202,9 +202,9 @@ _PyArg_VaParse_SizeT(PyObject *args, const char *format, va_list va)
static int
cleanup_ptr(PyObject *self, void *ptr)
{
if (ptr) {
PyMem_Free(ptr);
}
void **pptr = (void **)ptr;
PyMem_Free(*pptr);
*pptr = NULL;
return 0;
}
@ -1116,7 +1116,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
PyErr_NoMemory();
RETURN_ERR_OCCURRED;
}
if (addcleanup(*buffer, freelist, cleanup_ptr)) {
if (addcleanup(buffer, freelist, cleanup_ptr)) {
Py_DECREF(s);
return converterr(
"(cleanup problem)",
@ -1162,7 +1162,7 @@ convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
PyErr_NoMemory();
RETURN_ERR_OCCURRED;
}
if (addcleanup(*buffer, freelist, cleanup_ptr)) {
if (addcleanup(buffer, freelist, cleanup_ptr)) {
Py_DECREF(s);
return converterr("(cleanup problem)",
arg, msgbuf, bufsize);