From patchwork Wed Feb 8 06:21:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13132458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F6A4C6379F for ; Wed, 8 Feb 2023 06:21:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230103AbjBHGVk (ORCPT ); Wed, 8 Feb 2023 01:21:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229519AbjBHGVi (ORCPT ); Wed, 8 Feb 2023 01:21:38 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 64EDD23861; Tue, 7 Feb 2023 22:21:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id F27BE614E5; Wed, 8 Feb 2023 06:21:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F8D2C4339C; Wed, 8 Feb 2023 06:21:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675837296; bh=9FKAgPpudsEY1b71O+8Pdv2NPJKqQ94hKa6qzZM+f/E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X2gSotr/T2tuDmj7eKZmGldsLfnOOCW8QnUhI2J1RVyfsgRQkq6H/4aUYesDQqe5u p9xk2PzVPdD3+GWILcUbgcq3lYj62oT2jWOjX9pvjpMINlDn9DM8Ba7BMJtgrazy7L MQnl1SYZ/1vlQofGYyiIllHv+nQqLWAQJKdkHMJRW0XXpjuq+/53oHp4oNTNvW0uXB DGMASFJ6wcbYlRfKN9HQJ83ru/vWVpJ761mzUoHLe2g8zHMOvokUupC6LVJnjhERJI HXgyqcAzu02y7ZMxIXGiHqkJumxfzUmZ6lJ7AZurqZgLD7eZw3M/uzoUunaFzn/wNP zEVtwiPO+49gw== From: Eric Biggers To: linux-fscrypt@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, Linus Torvalds Subject: [PATCH 5/5] fscrypt: clean up fscrypt_add_test_dummy_key() Date: Tue, 7 Feb 2023 22:21:07 -0800 Message-Id: <20230208062107.199831-6-ebiggers@kernel.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230208062107.199831-1-ebiggers@kernel.org> References: <20230208062107.199831-1-ebiggers@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org From: Eric Biggers Now that fscrypt_add_test_dummy_key() is only called by setup_file_encryption_key() and not by the individual filesystems, un-export it. Also change its prototype to take the fscrypt_key_specifier directly, as the caller already has it. Signed-off-by: Eric Biggers --- fs/crypto/fscrypt_private.h | 3 +++ fs/crypto/keyring.c | 26 +++++++------------------- fs/crypto/keysetup.c | 4 +--- include/linux/fscrypt.h | 9 --------- 4 files changed, 11 insertions(+), 31 deletions(-) diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index 17dd33d9a522e..0fec2dfc36ebe 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -573,6 +573,9 @@ fscrypt_find_master_key(struct super_block *sb, int fscrypt_get_test_dummy_key_identifier( u8 key_identifier[FSCRYPT_KEY_IDENTIFIER_SIZE]); +int fscrypt_add_test_dummy_key(struct super_block *sb, + struct fscrypt_key_specifier *key_spec); + int fscrypt_verify_key_added(struct super_block *sb, const u8 identifier[FSCRYPT_KEY_IDENTIFIER_SIZE]); diff --git a/fs/crypto/keyring.c b/fs/crypto/keyring.c index 78dd2ff306bd7..78086f8dbda52 100644 --- a/fs/crypto/keyring.c +++ b/fs/crypto/keyring.c @@ -211,10 +211,6 @@ static int allocate_filesystem_keyring(struct super_block *sb) * are still available at this time; this is important because after user file * accesses have been allowed, this function may need to evict keys from the * keyslots of an inline crypto engine, which requires the block device(s). - * - * This is also called when the super_block is being freed. This is needed to - * avoid a memory leak if mounting fails after the "test_dummy_encryption" - * option was processed, as in that case the unmount-time call isn't made. */ void fscrypt_destroy_keyring(struct super_block *sb) { @@ -778,34 +774,26 @@ int fscrypt_get_test_dummy_key_identifier( /** * fscrypt_add_test_dummy_key() - add the test dummy encryption key * @sb: the filesystem instance to add the key to - * @dummy_policy: the encryption policy for test_dummy_encryption + * @key_spec: the key specifier of the test dummy encryption key * - * If needed, add the key for the test_dummy_encryption mount option to the - * filesystem. To prevent misuse of this mount option, a per-boot random key is - * used instead of a hardcoded one. This makes it so that any encrypted files - * created using this option won't be accessible after a reboot. + * Add the key for the test_dummy_encryption mount option to the filesystem. To + * prevent misuse of this mount option, a per-boot random key is used instead of + * a hardcoded one. This makes it so that any encrypted files created using + * this option won't be accessible after a reboot. * * Return: 0 on success, -errno on failure */ int fscrypt_add_test_dummy_key(struct super_block *sb, - const struct fscrypt_dummy_policy *dummy_policy) + struct fscrypt_key_specifier *key_spec) { - const union fscrypt_policy *policy = dummy_policy->policy; - struct fscrypt_key_specifier key_spec; struct fscrypt_master_key_secret secret; int err; - if (!policy) - return 0; - err = fscrypt_policy_to_key_spec(policy, &key_spec); - if (err) - return err; fscrypt_get_test_dummy_secret(&secret); - err = add_master_key(sb, &secret, &key_spec); + err = add_master_key(sb, &secret, key_spec); wipe_master_key_secret(&secret); return err; } -EXPORT_SYMBOL_GPL(fscrypt_add_test_dummy_key); /* * Verify that the current user has added a master key with the given identifier diff --git a/fs/crypto/keysetup.c b/fs/crypto/keysetup.c index 20323c0ba4c5e..aa94fba9d17e7 100644 --- a/fs/crypto/keysetup.c +++ b/fs/crypto/keysetup.c @@ -464,9 +464,7 @@ static int setup_file_encryption_key(struct fscrypt_info *ci, */ if (dummy_policy && fscrypt_policies_equal(dummy_policy, &ci->ci_policy)) { - struct fscrypt_dummy_policy tmp = { dummy_policy }; - - err = fscrypt_add_test_dummy_key(sb, &tmp); + err = fscrypt_add_test_dummy_key(sb, &mk_spec); if (err) return err; mk = fscrypt_find_master_key(sb, &mk_spec); diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h index 4f5f8a6512132..44848d870046a 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -309,8 +309,6 @@ fscrypt_free_dummy_policy(struct fscrypt_dummy_policy *dummy_policy) /* keyring.c */ void fscrypt_destroy_keyring(struct super_block *sb); int fscrypt_ioctl_add_key(struct file *filp, void __user *arg); -int fscrypt_add_test_dummy_key(struct super_block *sb, - const struct fscrypt_dummy_policy *dummy_policy); int fscrypt_ioctl_remove_key(struct file *filp, void __user *arg); int fscrypt_ioctl_remove_key_all_users(struct file *filp, void __user *arg); int fscrypt_ioctl_get_key_status(struct file *filp, void __user *arg); @@ -530,13 +528,6 @@ static inline int fscrypt_ioctl_add_key(struct file *filp, void __user *arg) return -EOPNOTSUPP; } -static inline int -fscrypt_add_test_dummy_key(struct super_block *sb, - const struct fscrypt_dummy_policy *dummy_policy) -{ - return 0; -} - static inline int fscrypt_ioctl_remove_key(struct file *filp, void __user *arg) { return -EOPNOTSUPP;