# HG changeset patch
# User Benjamin Peterson <benjamin@python.org>
# Date 1453357506 28800
# Node ID 10dad6da1b28ea4af78ad9529e469fdbf4ebbc8f
# Parent  a3ac2cd93db9d5336dfd7b5b27efde2c568d8794# Parent  01ddd608b85c85952537d95a43bbabf4fb655057
 
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -1127,6 +1127,11 @@ get_data(PyObject *archive, PyObject *to
     }
     file_offset += l;           /* Start of file data */
 
+    if (data_size > LONG_MAX - 1) {
+        fclose(fp);
+        PyErr_NoMemory();
+        return NULL;
+    }
     bytes_size = compress == 0 ? data_size : data_size + 1;
     if (bytes_size == 0)
         bytes_size++;