From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B8F41B87CF; Tue, 8 Apr 2025 12:41:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744116089; cv=none; b=qjl7DJPSlE5U82ijrf4t7+mi1jNnhOMlgfvjecI00j22j23HfKtT5NKvSO/63tlfgukNXhqaL1qvL3ImPsCSiYJ5Bo+UBDdJMaRlgXvgE/pn1KSyvPgmpRlbnPzhj5gXMuu4PVzFzGrCVFA7FGCZqc/xVGR/Rtfk57KrQixtY88= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744116089; c=relaxed/simple; bh=WzbpOp9m/JGT6+H4H6yjl4AS+1euCW128zq3eE/Q6Xo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UK9Elct0utQrQVfT/oXxED8ik2ZjnG8wQra6d9epwPZXTxvJ3BCbe1yOsWThWTIPNg/LcEOQ3uHefUAWhPtnhfiS+ItYYAfc0Tq7SgLGDG5aUih4eRdHk+f6PnB32Jb34N4p0CB1vFxb8Y0YiA0j08eKhMUhVlT6MzYZcutwjoY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xGsRZfBy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xGsRZfBy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09518C4CEE5; Tue, 8 Apr 2025 12:41:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744116089; bh=WzbpOp9m/JGT6+H4H6yjl4AS+1euCW128zq3eE/Q6Xo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xGsRZfByUIWsBnWXb4AIiXzzYalGZ5oKY6455WgYOB5js5AYSiPJsJeBUcu+B63WZ WcvsNkUxdJj6Stir2OoZcldFksNwMNaP07Dxlx6dWcBKdiMJy5yckiIdmG29Yl4YUv stNnXl+NpfhXs+dnxXTyU6oR78l3uWcEt2k3x2pA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konstantin Andreev , Casey Schaufler , Sasha Levin Subject: [PATCH 6.12 004/423] smack: dont compile ipv6 code unless ipv6 is configured Date: Tue, 8 Apr 2025 12:45:30 +0200 Message-ID: <20250408104845.797076598@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104845.675475678@linuxfoundation.org> References: <20250408104845.675475678@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Konstantin Andreev [ Upstream commit bfcf4004bcbce2cb674b4e8dbd31ce0891766bac ] I want to be sure that ipv6-specific code is not compiled in kernel binaries if ipv6 is not configured. [1] was getting rid of "unused variable" warning, but, with that, it also mandated compilation of a handful ipv6- specific functions in ipv4-only kernel configurations: smk_ipv6_localhost, smack_ipv6host_label, smk_ipv6_check. Their compiled bodies are likely to be removed by compiler from the resulting binary, but, to be on the safe side, I remove them from the compiler view. [1] Fixes: 00720f0e7f28 ("smack: avoid unused 'sip' variable warning") Signed-off-by: Konstantin Andreev Signed-off-by: Casey Schaufler Signed-off-by: Sasha Levin --- security/smack/smack.h | 6 ++++++ security/smack/smack_lsm.c | 10 +++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/security/smack/smack.h b/security/smack/smack.h index dbf8d7226eb56..1c3656b5e3b91 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -152,6 +152,7 @@ struct smk_net4addr { struct smack_known *smk_label; /* label */ }; +#if IS_ENABLED(CONFIG_IPV6) /* * An entry in the table identifying IPv6 hosts. */ @@ -162,7 +163,9 @@ struct smk_net6addr { int smk_masks; /* mask size */ struct smack_known *smk_label; /* label */ }; +#endif /* CONFIG_IPV6 */ +#ifdef SMACK_IPV6_PORT_LABELING /* * An entry in the table identifying ports. */ @@ -175,6 +178,7 @@ struct smk_port_label { short smk_sock_type; /* Socket type */ short smk_can_reuse; }; +#endif /* SMACK_IPV6_PORT_LABELING */ struct smack_known_list_elem { struct list_head list; @@ -314,7 +318,9 @@ extern struct smack_known smack_known_web; extern struct mutex smack_known_lock; extern struct list_head smack_known_list; extern struct list_head smk_net4addr_list; +#if IS_ENABLED(CONFIG_IPV6) extern struct list_head smk_net6addr_list; +#endif /* CONFIG_IPV6 */ extern struct mutex smack_onlycap_lock; extern struct list_head smack_onlycap_list; diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 370fd594da125..c066c38c50882 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2498,6 +2498,7 @@ static struct smack_known *smack_ipv4host_label(struct sockaddr_in *sip) return NULL; } +#if IS_ENABLED(CONFIG_IPV6) /* * smk_ipv6_localhost - Check for local ipv6 host address * @sip: the address @@ -2565,6 +2566,7 @@ static struct smack_known *smack_ipv6host_label(struct sockaddr_in6 *sip) return NULL; } +#endif /* CONFIG_IPV6 */ /** * smack_netlbl_add - Set the secattr on a socket @@ -2669,6 +2671,7 @@ static int smk_ipv4_check(struct sock *sk, struct sockaddr_in *sap) return rc; } +#if IS_ENABLED(CONFIG_IPV6) /** * smk_ipv6_check - check Smack access * @subject: subject Smack label @@ -2701,6 +2704,7 @@ static int smk_ipv6_check(struct smack_known *subject, rc = smk_bu_note("IPv6 check", subject, object, MAY_WRITE, rc); return rc; } +#endif /* CONFIG_IPV6 */ #ifdef SMACK_IPV6_PORT_LABELING /** @@ -3033,7 +3037,9 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap, return 0; if (addrlen < offsetofend(struct sockaddr, sa_family)) return 0; - if (IS_ENABLED(CONFIG_IPV6) && sap->sa_family == AF_INET6) { + +#if IS_ENABLED(CONFIG_IPV6) + if (sap->sa_family == AF_INET6) { struct sockaddr_in6 *sip = (struct sockaddr_in6 *)sap; struct smack_known *rsp = NULL; @@ -3053,6 +3059,8 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap, return rc; } +#endif /* CONFIG_IPV6 */ + if (sap->sa_family != AF_INET || addrlen < sizeof(struct sockaddr_in)) return 0; rc = smk_ipv4_check(sock->sk, (struct sockaddr_in *)sap); -- 2.39.5