From patchwork Tue Jan 11 19:15:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 532007 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 C4872C4332F for ; Tue, 11 Jan 2022 19:17:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350667AbiAKTRL (ORCPT ); Tue, 11 Jan 2022 14:17:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350677AbiAKTQ4 (ORCPT ); Tue, 11 Jan 2022 14:16:56 -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 3A71FC029820; Tue, 11 Jan 2022 11:16:29 -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 1D18761785; Tue, 11 Jan 2022 19:16:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18D39C36AE9; Tue, 11 Jan 2022 19:16:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1641928588; bh=Lsmgt5A5ih2yLw7ckltyZGUoIOT+lEd5XZYiRpW2sJY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pksdYO2C9wlgeoePLmasOb0mpQyZNYU868l88s25aDlRKRmAWsqv36Y5QWyDROrDz mDZ/LcU1igO18toM5tCouotCTtIdR3WVa/5FtjKTCEAXnqYKdWnj0tEKQRmEIvkh0X IMyFKisdGQIoxpbrlsfdj1KJIrNZbKwbXRMFWBtaWJwu+Qb5/Ubon/eranfA9KNhcZ 7+ZidMP1sYBBRaCkpOX01Y+xkWb7WNcp2vWyHEYozASwmeN5YXk5eZk9bq+lp556TD 2+Ilp1hKd24uMlE80biBp4fuANWo9+4iFlOX1l8Uewgg8Nyovxr0KA8kY7/j1vsNn7 7axDQvxkJGIuw== From: Jeff Layton To: ceph-devel@vger.kernel.org, linux-fscrypt@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, idryomov@gmail.com Subject: [RFC PATCH v10 25/48] ceph: add some fscrypt guardrails Date: Tue, 11 Jan 2022 14:15:45 -0500 Message-Id: <20220111191608.88762-26-jlayton@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220111191608.88762-1-jlayton@kernel.org> References: <20220111191608.88762-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Ensure that we all into fscrypt to do a proper check for keys on link, rename, etc. Signed-off-by: Jeff Layton --- fs/ceph/dir.c | 8 ++++++++ fs/ceph/file.c | 14 +++++++++++++- fs/ceph/inode.c | 4 ++++ 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index bf686e4af27a..37c9c589ee27 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1127,6 +1127,10 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir, if (ceph_snap(dir) != CEPH_NOSNAP) return -EROFS; + err = fscrypt_prepare_link(old_dentry, dir, dentry); + if (err) + return err; + dout("link in dir %p old_dentry %p dentry %p\n", dir, old_dentry, dentry); req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); @@ -1324,6 +1328,10 @@ static int ceph_rename(struct user_namespace *mnt_userns, struct inode *old_dir, (!ceph_quota_is_same_realm(old_dir, new_dir))) return -EXDEV; + err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, flags); + if (err) + return err; + dout("rename dir %p dentry %p to dir %p dentry %p\n", old_dir, old_dentry, new_dir, new_dentry); req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 5937a25ddddd..01e7cdd84c36 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -356,8 +356,13 @@ int ceph_open(struct inode *inode, struct file *file) /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ flags = file->f_flags & ~(O_CREAT|O_EXCL); - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode)) { flags = O_DIRECTORY; /* mds likes to know */ + } else if (S_ISREG(inode->i_mode)) { + err = fscrypt_file_open(inode, file); + if (err) + return err; + } dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, ceph_vinop(inode), file, flags, file->f_flags); @@ -802,6 +807,13 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, dout("atomic_open finish_no_open on dn %p\n", dn); err = finish_no_open(file, dn); } else { + if (IS_ENCRYPTED(dir) && + !fscrypt_has_permitted_context(dir, d_inode(dentry))) { + pr_warn("Inconsistent encryption context (parent %llx:%llx child %llx:%llx)\n", + ceph_vinop(dir), ceph_vinop(d_inode(dentry))); + goto out_req; + } + dout("atomic_open finish_open on dn %p\n", dn); if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { struct inode *newino = d_inode(dentry); diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index e7fb212661d1..55022fdb1fdf 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2504,6 +2504,10 @@ int ceph_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, if (ceph_inode_is_shutdown(inode)) return -ESTALE; + err = fscrypt_prepare_setattr(dentry, attr); + if (err) + return err; + err = setattr_prepare(&init_user_ns, dentry, attr); if (err != 0) return err;