From: Michihiro NAKAJIMA <ggcueroad@gmail.com>
Date: Sun, 11 Nov 2012 10:29:28 +0000 (+0900)
Subject: Fix a bug that Clang Static Analyzer complains that
X-Git-Tag: v3.1.0~39^2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b58d814f581a181bac80f12f43820200206b6a56;p=thirdparty%2Flibarchive.git

Fix a bug that Clang Static Analyzer complains that
"Dereference of null pointer".
---

diff --git a/libarchive/archive_write_add_filter_program.c b/libarchive/archive_write_add_filter_program.c
index 796586c1b..fc232da0c 100644
--- a/libarchive/archive_write_add_filter_program.c
+++ b/libarchive/archive_write_add_filter_program.c
@@ -160,10 +160,13 @@ archive_compressor_program_free(struct archive_write_filter *f)
 {
 	struct private_data *data = (struct private_data *)f->data;
 
-	free(data->cmd);
-	archive_string_free(&data->description);
-	__archive_write_program_free(data->pdata);
-	free(data);
+	if (data) {
+		free(data->cmd);
+		archive_string_free(&data->description);
+		__archive_write_program_free(data->pdata);
+		free(data);
+		f->data = NULL;
+	}
 	return (ARCHIVE_OK);
 }