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netfilter: flowtable: add a 'default' case to flowtable datapath 

Add a 'default' case in case return a uninitialized value of ret, this
should not ever happen since the follow transmit path types:

- FLOW_OFFLOAD_XMIT_UNSPEC
- FLOW_OFFLOAD_XMIT_TC

are never observed from this path. Add this check for safety reasons.

Signed-off-by: Li Qiong <liqiong@nfschina.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Li Qiong 2022-12-06 15:44:14 +08:00 committed by Pablo Neira Ayuso
parent 7d7cfb48d8
commit 895fa59647
1 changed files with 8 additions and 0 deletions
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8
net/netfilter/nf_flow_table_ip.c
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@ -421,6 +421,10 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
if (ret == NF_DROP) if (ret == NF_DROP)
flow_offload_teardown(flow); flow_offload_teardown(flow);
break; break;
default:
WARN_ON_ONCE(1);
ret = NF_DROP;
break;
} }
return ret; return ret;
@ -682,6 +686,10 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
if (ret == NF_DROP) if (ret == NF_DROP)
flow_offload_teardown(flow); flow_offload_teardown(flow);
break; break;
default:
WARN_ON_ONCE(1);
ret = NF_DROP;
break;
} }
return ret; return ret;