reject negative data_size

02246381 · Benjamin Peterson · 802c8a59 · 02246381
Commit 02246381 authored Jan 21, 2016 by Benjamin Peterson
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Modules/zipimport.c Modules/zipimport.c +4 -0

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--- 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) {