Return-Path: Received: from mail-wi0-f181.google.com ([209.85.212.181]:33329 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933786AbbHDLzp (ORCPT ); Tue, 4 Aug 2015 07:55:45 -0400 From: Andreas Gruenbacher To: linux-kernel@vger.kernel.org Cc: 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, Andreas Gruenbacher Subject: [RFC v6 34/40] ext4: Don't allow unmapped identifiers in richacls Date: Tue, 4 Aug 2015 13:53:32 +0200 Message-Id: <1438689218-6921-35-git-send-email-agruenba@redhat.com> In-Reply-To: <1438689218-6921-1-git-send-email-agruenba@redhat.com> References: <1438689218-6921-1-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 4385f6d..9d80299 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); -- 2.5.0