From 13ea0c5d9c3d1e88373af65ee11490077cfb2e80 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Fri, 29 Jan 2016 00:37:28 +0200
Subject: [PATCH] Fixed an infinite loop in zipimport caused by cebcd2fd3e1f
 (issue #19883).

---
 Modules/zipimport.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 0f68cec85bf5..ee44cab81805 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -776,14 +776,14 @@ read_directory(const char *archive)
 
     /* Start of Central Directory */
     count = 0;
+    if (fseek(fp, (long)header_position, 0) == -1) {
+        goto file_error;
+    }
     for (;;) {
         PyObject *t;
         size_t n;
         int err;
 
-        if (fseek(fp, (long)header_position, 0) == -1) {
-            goto file_error;
-        }
         n = fread(buffer, 1, 46, fp);
         if (n < 4) {
             goto eof_error;
@@ -837,7 +837,6 @@ read_directory(const char *archive)
                 goto file_error;
             }
         }
-        header_offset += header_size;
 
         strncpy(path + length + 1, name, MAXPATHLEN - length - 1);
 
-- 
2.47.3