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Wed, 30 Sep 2026 13:54:44 +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 fJXpHGIUvWqUTwAAD6G6ig:T13 (envelope-from ); Wed, 30 Sep 2026 13:54:44 +0000 From: Fernando Fernandez Mancera To: netdev@vger.kernel.org Cc: horms@kernel.org, kuba@kernel.org, pabeni@redhat.com, edumazet@kernel.org, davem@davemloft.net, Fernando Fernandez Mancera , Pablo Neira Ayuso , Florian Westphal , Phil Sutter , Eric Dumazet , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, linux-kernel@vger.kernel.org Subject: [PATCH 12/16 net-next v3] netfilter: ipv4: guard ip_route_me_harder() with CONFIG_IPV4 Date: Wed, 30 Sep 2026 15:52:55 +0200 Message-ID: <20260930135334.4739-13-fmancera@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260930135334.4739-1-fmancera@suse.de> References: <20260930135334.4739-1-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-Spamd-Result: default: False [-6.76 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.16)[-0.811]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_TWELVE(0.00)[14]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLrr9ek4ud4f4qwi71m7motjzt)]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: -6.76 X-Spam-Level: X-Spam-Flag: NO 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 | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c index ce9e1bfa4259..f2d9e0110b77 100644 --- a/net/ipv4/netfilter.c +++ b/net/ipv4/netfilter.c @@ -30,6 +30,9 @@ int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, un struct flow_keys flkeys; unsigned int hh_len; + if (!IS_ENABLED(CONFIG_IPV4)) + return -EPROTONOSUPPORT; + sk = sk_to_full_sk(sk); flags = sk ? inet_sk_flowi_flags(sk) : 0; -- 2.55.0