gh-101952: Fix possible segfault in BUILD_SET opcode (#101958)

Eclips4 · web-flow · commit 68bd8c5e2efa · 2023-02-16T09:46:43.000-08:00
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst b/Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst
@@ -0,0 +1 @@
+Fix possible segfault in ``BUILD_SET`` opcode, when new set created.
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
@@ -1302,6 +1302,8 @@ dummy_func(
 
         inst(BUILD_SET, (values[oparg] -- set)) {
             set = PySet_New(NULL);
+            if (set == NULL)
+                goto error;
             int err = 0;
             for (int i = 0; i < oparg; i++) {
                 PyObject *item = values[i];
diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix possible segfault in ``BUILD_SET`` opcode, when new set created.