From: Michihiro NAKAJIMA <ggcueroad@gmail.com>
Date: Thu, 9 Feb 2012 01:32:08 +0000 (+0900)
Subject: If a zip archive file is corruped, the compression type can be negative and
X-Git-Tag: v3.0.4~2^2~99
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ec54f09164cee64539c5412e707bf2a04970d85;p=thirdparty%2Flibarchive.git

If a zip archive file is corruped, the compression type can be negative and
it can cause a segfault.
---

diff --git a/libarchive/archive_read_support_format_zip.c b/libarchive/archive_read_support_format_zip.c
index d5deab8d7..d8c1ebc72 100644
--- a/libarchive/archive_read_support_format_zip.c
+++ b/libarchive/archive_read_support_format_zip.c
@@ -787,7 +787,7 @@ compression_name(int compression)
 		"deflation"
 	};
 
-	if (compression <
+	if (0 <= compression && compression <
 	    (int)(sizeof(compression_names)/sizeof(compression_names[0])))
 		return compression_names[compression];
 	else