commit 5ce3f10aeea711bb912e948fa5d9f63736df1327
author Serhiy Storchaka <storchaka@gmail.com> Thu Jan 09 14:50:20 2014 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Thu Jan 09 14:50:20 2014 +0200
tree 977da819c4d6e15bb355334b15b88b67d8f52c90
parent 78ee3289e991882d803be4cb0dd6b4005f82cbb1

Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU
consumption.

Lib/zipfile.py

diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index 92c98ab..a1b3414 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -860,6 +860,8 @@
 
         data = self._fileobj.read(n)
         self._compress_left -= len(data)
+        if not data:
+            raise EOFError
 
         if self._decrypter is not None:
             data = bytes(map(self._decrypter, data))