From b9d80f83bf8c3485ae53a4f3a715363d764bb0e4 Mon Sep 17 00:00:00 2001
From: Gao Feng <fgao@ikuai8.com>
Date: Tue, 20 Sep 2016 10:31:04 +0800
Subject: [PATCH] netfilter: xt_helper: Use sizeof(variable) instead of literal
 number

It's better to use sizeof(info->name)-1 as index to force set the string
tail instead of literal number '29'.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/xt_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/xt_helper.c b/net/netfilter/xt_helper.c
index 9f4ab00c8050..805c9f64a04c 100644
--- a/net/netfilter/xt_helper.c
+++ b/net/netfilter/xt_helper.c
@@ -65,7 +65,7 @@ static int helper_mt_check(const struct xt_mtchk_param *par)
 			par->family);
 		return ret;
 	}
-	info->name[29] = '\0';
+	info->name[sizeof(info->name) - 1] = '\0';
 	return 0;
 }