Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934153AbcJUM5g (ORCPT ); Fri, 21 Oct 2016 08:57:36 -0400 Received: from mail.sigma-star.at ([95.130.255.111]:46008 "EHLO mail.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932622AbcJUMtS (ORCPT ); Fri, 21 Oct 2016 08:49:18 -0400 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, Richard Weinberger Subject: [PATCH 13/26] ubifs: Enforce crypto policy in mmap Date: Fri, 21 Oct 2016 14:48:28 +0200 Message-Id: <1477054121-10198-14-git-send-email-richard@nod.at> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1477054121-10198-1-git-send-email-richard@nod.at> References: <1477054121-10198-1-git-send-email-richard@nod.at> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 30 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 fc79278969e5..bd0049788e24 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) -- 2.7.3