From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB5104A9D51; Thu, 10 Sep 2026 14:50:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789051858; cv=none; b=huf4hDWXLXPcEnjP6C9+GvZdQQ9MLA07v72huFt5Ws5n9VWTKBgSvHYi3i+uqoQvR4tsExqZLoLkzHwd3VWZZkLm0FSKHEG/69doOBvZ1flOcBFQJfLPUC137DzxsObl+5USlmBKnnx7pRvm8+V6/z/+Tb9ByXlzs70jPyzPk8I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789051858; c=relaxed/simple; bh=VgDQLjEmfqYzWvhIfjC4vevmBx4bVHhtcESKUjhlB0s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PMP/3H1LpE+9EEOR3cxpsQWqzon+DH37odotUzmAHBGrTrbbdcraTQ/a3A2vRv92rVoonK6gps7/BupaJQxTLpWXEc8d0hkPzWvrH5mcB4H2q+5FV4JeCKPIozl9EBLF019ys7IkMzVTJFVBvxb38b0Tl55XSD283fz6ZZ7HBcQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; arc=none smtp.client-ip=195.135.223.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id C7AE91FE01; Thu, 10 Sep 2026 14:50:54 +0000 (UTC) Authentication-Results: smtp-out2.suse.de; none Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id EB854137FD; Thu, 10 Sep 2026 14:50:53 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id oFa5Ns3DomogZwAAD6G6ig (envelope-from ); Thu, 10 Sep 2026 14:50:53 +0000 From: Fernando Fernandez Mancera To: netdev@vger.kernel.org Cc: horms@kernel.org, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, davem@davemloft.net, Fernando Fernandez Mancera , Pablo Neira Ayuso , Florian Westphal , Phil Sutter , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, linux-kernel@vger.kernel.org Subject: [PATCH 11/13 net-next] netfilter: ipv4: guard ip_route_me_harder() with CONFIG_IPV4 Date: Thu, 10 Sep 2026 16:48:36 +0200 Message-ID: <20260910144914.8025-12-fmancera@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260910144914.8025-1-fmancera@suse.de> References: <20260910144914.8025-1-fmancera@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spam-Level: X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Queue-Id: C7AE91FE01 X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -4.00 To enable compiling the network stack without IPv4, IPv4 specific packet rerouting logic inside netfilter must be bypassed. Therefore, guard ip_route_me_harder() with IS_ENABLED(CONFIG_IPV4) so it returns -EPROTONOSUPPORT when IPv4 is disabled. Signed-off-by: Fernando Fernandez Mancera --- net/ipv4/netfilter.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c index ce9e1bfa4259..9576d91bb6a6 100644 --- a/net/ipv4/netfilter.c +++ b/net/ipv4/netfilter.c @@ -21,6 +21,7 @@ /* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, unsigned int addr_type) { +#if IS_ENABLED(CONFIG_IPV4) struct net_device *dev = skb_dst_dev(skb); const struct iphdr *iph = ip_hdr(skb); struct rtable *rt; @@ -85,6 +86,9 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un return -ENOMEM; return 0; +#else + return -EPROTONOSUPPORT; +#endif } EXPORT_SYMBOL(ip_route_me_harder); -- 2.55.0