Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:38318 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752101AbbIEK2m (ORCPT ); Sat, 5 Sep 2015 06:28:42 -0400 From: Andreas Gruenbacher To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org, linux-cifs@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [RFC v7 34/41] ext4: Don't allow unmapped identifiers in richacls Date: Sat, 5 Sep 2015 12:27:29 +0200 Message-Id: <1441448856-13478-35-git-send-email-agruenba@redhat.com> In-Reply-To: <1441448856-13478-1-git-send-email-agruenba@redhat.com> References: <1441448856-13478-1-git-send-email-agruenba@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Don't allow acls which contain unmapped identifiers: they are meaningful for remote file systems only. Signed-off-by: Andreas Gruenbacher --- fs/ext4/richacl.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/ext4/richacl.c b/fs/ext4/richacl.c index 6758def..ca6e0cb 100644 --- a/fs/ext4/richacl.c +++ b/fs/ext4/richacl.c @@ -68,8 +68,13 @@ ext4_set_richacl(handle_t *handle, struct inode *inode, struct richacl *acl) int retval; if (acl) { - mode_t mode = inode->i_mode; + mode_t mode; + /* Don't allow acls with unmapped identifiers. */ + if (richacl_has_unmapped_identifiers(acl)) + return -EINVAL; + + mode = inode->i_mode; if (richacl_equiv_mode(acl, &mode) == 0) { inode->i_mode = mode; ext4_mark_inode_dirty(handle, inode); -- 2.4.3