From: Michihiro NAKAJIMA <ggcueroad@gmail.com>
Date: Sun, 6 Jul 2014 03:57:47 +0000 (+0900)
Subject: Fix dereference of null pointer which Clang Static Analyser pointed out.
X-Git-Tag: v3.1.900a~262
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=085130c376da9cf23795fbf3288938199d1d14da;p=thirdparty%2Flibarchive.git

Fix dereference of null pointer which Clang Static Analyser pointed out.
---

diff --git a/libarchive/archive_write_set_format_mtree.c b/libarchive/archive_write_set_format_mtree.c
index 4d343eaf2..3e97adc5b 100644
--- a/libarchive/archive_write_set_format_mtree.c
+++ b/libarchive/archive_write_set_format_mtree.c
@@ -639,7 +639,7 @@ attr_counter_inc(struct attr_counter **top, struct attr_counter *ac,
 			*top = ac;
 			ac->next->prev = ac;
 		}
-	} else {
+	} else if (last != NULL) {
 		ac = attr_counter_new(me, last);
 		if (ac == NULL)
 			return (-1);