From: Gao Feng <f...@ikuai8.com>

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 <f...@ikuai8.com>
---
 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 9f4ab00..f71ee88 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;
 }
 
-- 
1.9.1


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