From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sun, 18 Mar 2012 18:07:02 +0000 (-0700)
Subject: gzip: fix nondeterministic compression results
X-Git-Tag: v1.5~6
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=0a284baeaedca68017f46d2646e4c921aa98a90d;p=debian%2Fgzip

gzip: fix nondeterministic compression results

Reported by Jakub Wilk in <http://bugs.debian.org/647522>.
* deflate.c (fill_window): Don't let garbage pollute the dictionary.
---

diff --git a/deflate.c b/deflate.c
index 6c19552..5405f10 100644
--- a/deflate.c
+++ b/deflate.c
@@ -571,6 +571,8 @@ local void fill_window()
         n = read_buf((char*)window+strstart+lookahead, more);
         if (n == 0 || n == (unsigned)EOF) {
             eofile = 1;
+            /* Don't let garbage pollute the dictionary.  */
+            memzero (window + strstart + lookahead, MIN_MATCH - 1);
         } else {
             lookahead += n;
         }