netdev - [PATCH net-next/netfilter] netfilter: nft_inner: fix IS

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Date:   Tue, 15 Nov 2022 15:56:00 +0300
From:   Dan Carpenter <error27@...il.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>
Cc:     Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH net-next/netfilter] netfilter: nft_inner: fix IS_ERR() vs
 NULL check

The __nft_expr_type_get() function returns NULL on error.  It never
returns error pointers.

Fixes: 3a07327d10a0 ("netfilter: nft_inner: support for inner tunnel header matching")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
This applies to net-next but presumably it's going to go through the
netfilter tree?

 net/netfilter/nf_tables_api.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 62da204eed41..6b159494c86b 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2873,8 +2873,8 @@ int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
 		return -EINVAL;
 
 	type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
-	if (IS_ERR(type))
-		return PTR_ERR(type);
+	if (!type)
+		return -ENOENT;
 
 	if (!type->inner_ops)
 		return -EOPNOTSUPP;
-- 
2.35.1