--- a/jdk/src/java.base/share/classes/java/util/zip/ZipInputStream.java	Fri Sep 12 13:08:35 2014 -0700
+++ b/jdk/src/java.base/share/classes/java/util/zip/ZipInputStream.java	Fri Aug 29 12:07:11 2014 -0700
@@ -336,8 +336,21 @@
         return new ZipEntry(name);
     }
 
-    /*
+    /**
      * Reads end of deflated entry as well as EXT descriptor if present.
+     *
+     * Local headers for DEFLATED entries may optionally be followed by a
+     * data descriptor, and that data descriptor may optionally contain a
+     * leading signature (EXTSIG).
+     *
+     * From the zip spec http://www.pkware.com/documents/casestudies/APPNOTE.TXT
+     *
+     * """Although not originally assigned a signature, the value 0x08074b50
+     * has commonly been adopted as a signature value for the data descriptor
+     * record.  Implementers should be aware that ZIP files may be
+     * encountered with or without this signature marking data descriptors
+     * and should account for either case when reading ZIP files to ensure
+     * compatibility."""
      */
     private void readEnd(ZipEntry e) throws IOException {
         int n = inf.getRemaining();
@@ -356,7 +369,7 @@
                     e.csize = get64(tmpbuf, ZIP64_EXTSIZ - ZIP64_EXTCRC);
                     e.size = get64(tmpbuf, ZIP64_EXTLEN - ZIP64_EXTCRC);
                     ((PushbackInputStream)in).unread(
-                        tmpbuf, ZIP64_EXTHDR - ZIP64_EXTCRC - 1, ZIP64_EXTCRC);
+                        tmpbuf, ZIP64_EXTHDR - ZIP64_EXTCRC, ZIP64_EXTCRC);
                 } else {
                     e.crc = get32(tmpbuf, ZIP64_EXTCRC);
                     e.csize = get64(tmpbuf, ZIP64_EXTSIZ);
@@ -370,7 +383,7 @@
                     e.csize = get32(tmpbuf, EXTSIZ - EXTCRC);
                     e.size = get32(tmpbuf, EXTLEN - EXTCRC);
                     ((PushbackInputStream)in).unread(
-                                               tmpbuf, EXTHDR - EXTCRC - 1, EXTCRC);
+                                               tmpbuf, EXTHDR - EXTCRC, EXTCRC);
                 } else {
                     e.crc = get32(tmpbuf, EXTCRC);
                     e.csize = get32(tmpbuf, EXTSIZ);