From 1c0e8ac9c02d82209a3405a972174a795d044038 Mon Sep 17 00:00:00 2001
From: qingkaishi <qingkaishi@gmail.com>
Date: Wed, 9 Sep 2020 23:58:28 +0800
Subject: [PATCH] fix Potential Null Pointer Dereference

---
 test/dnet/fw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/dnet/fw.c b/test/dnet/fw.c
index 1557827..c845263 100644
--- a/test/dnet/fw.c
+++ b/test/dnet/fw.c
@@ -108,7 +108,7 @@ arg_to_fr(int argc, char *argv[], struct fw_rule *fr)
 
 	p = strtok(argv[4], ":");
 	
-	if (addr_aton(p, &fr->fw_src) < 0)
+	if (!p || addr_aton(p, &fr->fw_src) < 0)
 		return (-1);
 
 	if ((p = strtok(NULL, ":")) != NULL) {
-- 
2.33.0