From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 12 Oct 2016 06:09:12 +0000
Subject: [patch] netfilter: nft_exthdr: fix error handling in nft_exthdr_init()
Message-Id: <20161012060912.GF12841@mwanda>
List-Id: <kernel-janitors.vger.kernel.org>
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To: Pablo Neira Ayuso <pablo@netfilter.org>, Laura Garcia Liebana <nevola@gmail.com>
Cc: Patrick McHardy <kaber@trash.net>, Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>, "David S. Miller" <davem@davemloft.net>, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, kernel-janitors@vger.kernel.org

"err" needs to be signed for the error handling to work.

Fixes: 36b701fae12a ('netfilter: nf_tables: validate maximum value of u32 netlink attributes')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c
index a84cf3d..47beb3a 100644
--- a/net/netfilter/nft_exthdr.c
+++ b/net/netfilter/nft_exthdr.c
@@ -59,7 +59,8 @@ static int nft_exthdr_init(const struct nft_ctx *ctx,
 			   const struct nlattr * const tb[])
 {
 	struct nft_exthdr *priv = nft_expr_priv(expr);
-	u32 offset, len, err;
+	u32 offset, len;
+	int err;
 
 	if (tb[NFTA_EXTHDR_DREG] = NULL ||
 	    tb[NFTA_EXTHDR_TYPE] = NULL ||