From: Michihiro NAKAJIMA <ggcueroad@gmail.com>
Date: Mon, 21 Nov 2011 02:08:33 +0000 (-0500)
Subject: Fix issue 199; improve robustness to corrupted ISO images.
X-Git-Tag: v3.0.1b~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c451144c0a402671c91cf79b89dc0cf203dcda76;p=thirdparty%2Flibarchive.git

Fix issue 199; improve robustness to corrupted ISO images.

SVN-Revision: 3823
---

diff --git a/libarchive/archive_read_support_format_iso9660.c b/libarchive/archive_read_support_format_iso9660.c
index a2ef9299a..247cdd7aa 100644
--- a/libarchive/archive_read_support_format_iso9660.c
+++ b/libarchive/archive_read_support_format_iso9660.c
@@ -305,6 +305,8 @@ struct file_info {
 		struct file_info	*first;
 		struct file_info	**last;
 	} rede_files;
+	/* To check a ininity loop. */
+	struct file_info	*loop_by;
 };
 
 struct heap_queue {
@@ -2839,8 +2841,14 @@ rede_add_entry(struct file_info *file)
 	struct file_info *re;
 
 	re = file->parent;
-	while (re != NULL && !re->re)
+	while (re != NULL && !re->re) {
+		/* Sanity check to prevent a infinity loop
+		 * cause by a currupted iso file. */
+		if (re->loop_by == file)
+			return (-1);
+		re->loop_by = file;
 		re = re->parent;
+	}
 	if (re == NULL)
 		return (-1);