From: Raymond Hettinger <python@rcn.com>
Date: Fri, 6 Aug 2004 19:46:34 +0000 (+0000)
Subject: SF bug #1004088:   big code objects (>64K) may be optimized incorrectly
X-Git-Tag: v2.4a3~394
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=98bd1814e24434ca9961dddc71bf21db67211ab9;p=python

SF bug #1004088:   big code objects (>64K) may be optimized incorrectly
Will backport.
---

diff --git a/Python/compile.c b/Python/compile.c
index 0b5ba6cd38..5c67987a9a 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -379,6 +379,11 @@ optimize_code(PyObject *code, PyObject* consts, PyObject *names)
 	if (codestr == NULL)
 		goto exitUnchanged;
 	codestr = memcpy(codestr, PyString_AS_STRING(code), codelen);
+
+	/* Avoid situations where jump retargeting could overflow */
+	if (codelen > 65000)
+		goto exitUnchanged;
+
 	blocks = markblocks(codestr, codelen);
 	if (blocks == NULL) {
 		PyMem_Free(codestr);