linux-kernel - Re: [PATCH net v1 1/1] netfilter: nf_reject: Fix build error when CONFIG_BRIDGE

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Message-ID: <ZudP-mkhquCJJPXv@calendula>
Date: Sun, 15 Sep 2024 23:22:02 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: Simon Horman <horms@...nel.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Pavel Tikhomirov <ptikhomirov@...tuozzo.com>,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, Jozsef Kadlecsik <kadlec@...filter.org>,
	"David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>
Subject: Re: [PATCH net v1 1/1] netfilter: nf_reject: Fix build error when
 CONFIG_BRIDGE_NETFILTER=n

Hi Simon,

This proposed update to address this compile time warning LGTM.

Would you submit it?

Thanks.

On Sat, Sep 07, 2024 at 02:48:37PM +0100, Simon Horman wrote:
[...]
> diff --git a/net/ipv4/netfilter/nf_reject_ipv4.c b/net/ipv4/netfilter/nf_reject_ipv4.c
> index 04504b2b51df..87fd945a0d27 100644
> --- a/net/ipv4/netfilter/nf_reject_ipv4.c
> +++ b/net/ipv4/netfilter/nf_reject_ipv4.c
> @@ -239,9 +239,8 @@ static int nf_reject_fill_skb_dst(struct sk_buff *skb_in)
>  void nf_send_reset(struct net *net, struct sock *sk, struct sk_buff *oldskb,
>  		   int hook)
>  {
> -	struct sk_buff *nskb;
> -	struct iphdr *niph;
>  	const struct tcphdr *oth;
> +	struct sk_buff *nskb;
>  	struct tcphdr _oth;
>  
>  	oth = nf_reject_ip_tcphdr_get(oldskb, &_oth, hook);
> @@ -266,14 +265,12 @@ void nf_send_reset(struct net *net, struct sock *sk, struct sk_buff *oldskb,
>  	nskb->mark = IP4_REPLY_MARK(net, oldskb->mark);
>  
>  	skb_reserve(nskb, LL_MAX_HEADER);
> -	niph = nf_reject_iphdr_put(nskb, oldskb, IPPROTO_TCP,
> -				   ip4_dst_hoplimit(skb_dst(nskb)));
> +	nf_reject_iphdr_put(nskb, oldskb, IPPROTO_TCP,
> +			    ip4_dst_hoplimit(skb_dst(nskb)));
>  	nf_reject_ip_tcphdr_put(nskb, oldskb, oth);
>  	if (ip_route_me_harder(net, sk, nskb, RTN_UNSPEC))
>  		goto free_nskb;
>  
> -	niph = ip_hdr(nskb);
> -
>  	/* "Never happens" */
>  	if (nskb->len > dst_mtu(skb_dst(nskb)))
>  		goto free_nskb;
> @@ -290,6 +287,7 @@ void nf_send_reset(struct net *net, struct sock *sk, struct sk_buff *oldskb,
>  	 */
>  	if (nf_bridge_info_exists(oldskb)) {
>  		struct ethhdr *oeth = eth_hdr(oldskb);
> +		struct iphdr *niph = ip_hdr(nskb);
>  		struct net_device *br_indev;
>  
>  		br_indev = nf_bridge_get_physindev(oldskb, net);