prevent double free in cleanup code (#17968)

benjaminp · benjaminp · commit dedac52731bd · 2013-05-13T19:55:40.000-05:00
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
@@ -10627,6 +10627,7 @@ posix_listxattr(PyObject *self, PyObject *args, PyObject *kwargs)
         if (length < 0) {
             if (errno == ERANGE) {
                 PyMem_FREE(buffer);
+                buffer = NULL;
                 continue;
             }
             path_error("listxattr", &path);

Original file line number	Diff line number	Diff line change
`@@ -10627,6 +10627,7 @@ posix_listxattr(PyObject self, PyObject args, PyObject *kwargs)`
`10627`	`10627`	`if (length < 0) {`
`10628`	`10628`	`if (errno == ERANGE) {`
`10629`	`10629`	`PyMem_FREE(buffer);`
	`10630`	`+ buffer = NULL;`
`10630`	`10631`	`continue;`
`10631`	`10632`	`}`
`10632`	`10633`	`path_error("listxattr", &path);`