linux-kernel - [PATCH v2] netfilter: add a 'default' case to 'switch (tuplehash->tuple.xmit

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Message-Id: <20221206074414.12208-1-liqiong@nfschina.com>
Date:   Tue,  6 Dec 2022 15:44:14 +0800
From:   Li Qiong <liqiong@...china.com>
To:     Pablo Neira Ayuso <pablo@...filter.org>,
        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>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        netfilter-devel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        coreteam@...filter.org, Yu Zhe <yuzhe@...china.com>,
        Li Qiong <liqiong@...china.com>
Subject: [PATCH v2] netfilter: add a 'default' case to 'switch (tuplehash->tuple.xmit_type)'

Add a 'default' case in case return a uninitialized value of ret.

Signed-off-by: Li Qiong <liqiong@...china.com>
---
v2: Add 'default' case instead of initializing 'ret'.
---
 net/netfilter/nf_flow_table_ip.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index b350fe9d00b0..19efba1e51ef 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -421,6 +421,10 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 		if (ret == NF_DROP)
 			flow_offload_teardown(flow);
 		break;
+	default:
+		WARN_ON_ONCE(1);
+		ret = NF_DROP;
+		break;
 	}
 
 	return ret;
@@ -682,6 +686,10 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
 		if (ret == NF_DROP)
 			flow_offload_teardown(flow);
 		break;
+	default:
+		WARN_ON_ONCE(1);
+		ret = NF_DROP;
+		break;
 	}
 
 	return ret;
-- 
2.11.0