From: Benjamin Peterson <benjamin@python.org>
Date: Fri, 22 Jan 2016 06:02:46 +0000 (-0800)
Subject: reject negative data_size
X-Git-Tag: v3.4.5rc1~16
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b1db7580611421309ab0be7c0801f4f89ecec440;p=python

reject negative data_size
---

diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 83fa8f9325..4594dd4f2f 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -1071,6 +1071,10 @@ get_data(PyObject *archive, PyObject *toc_entry)
                           &date, &crc)) {
         return NULL;
     }
+    if (data_size < 0) {
+        PyErr_Format(ZipImportError, "negative data size");
+        return NULL;
+    }
 
     fp = _Py_fopen_obj(archive, "rb");
     if (!fp) {