From patchwork Sun Nov 13 21:20:59 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Weinberger X-Patchwork-Id: 9425001 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E18DF6047D for ; Sun, 13 Nov 2016 21:26:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D290C288A2 for ; Sun, 13 Nov 2016 21:26:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C745028906; Sun, 13 Nov 2016 21:26:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5EC67288A2 for ; Sun, 13 Nov 2016 21:26:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964963AbcKMV0F (ORCPT ); Sun, 13 Nov 2016 16:26:05 -0500 Received: from mail.sigma-star.at ([95.130.255.111]:46001 "EHLO mail.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964875AbcKMVWB (ORCPT ); Sun, 13 Nov 2016 16:22:01 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.sigma-star.at (Postfix) with ESMTP id EFA7324E0013; Sun, 13 Nov 2016 22:21:58 +0100 (CET) Received: from linux.site (richard.vpn.sigmapriv.at [10.3.0.5]) by mail.sigma-star.at (Postfix) with ESMTPSA id 13EB924E0007; Sun, 13 Nov 2016 22:21:58 +0100 (CET) From: Richard Weinberger To: linux-mtd@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, dedekind1@gmail.com, adrian.hunter@intel.com, tytso@mit.edu, jaegeuk@kernel.org, david@sigma-star.at, wd@denx.de, sbabic@denx.de, dengler@linutronix.de, ebiggers@google.com, mhalcrow@google.com, hch@infradead.org, Richard Weinberger Subject: [PATCH 16/29] ubifs: Enforce crypto policy in mmap Date: Sun, 13 Nov 2016 22:20:59 +0100 Message-Id: <1479072072-6844-17-git-send-email-richard@nod.at> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1479072072-6844-1-git-send-email-richard@nod.at> References: <1479072072-6844-1-git-send-email-richard@nod.at> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We need this extra check in mmap because a process could gain an already opened fd. Signed-off-by: Richard Weinberger --- fs/ubifs/file.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index a9c5cc6c0bc5..60e789a9cac8 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -1594,6 +1594,15 @@ static const struct vm_operations_struct ubifs_file_vm_ops = { static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma) { int err; + struct inode *inode = file->f_mapping->host; + + if (ubifs_crypt_is_encrypted(inode)) { + err = fscrypt_get_encryption_info(inode); + if (err) + return -EACCES; + if (!fscrypt_has_encryption_key(inode)) + return -ENOKEY; + } err = generic_file_mmap(file, vma); if (err)