Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:57336 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752173AbbJETkl (ORCPT ); Mon, 5 Oct 2015 15:40:41 -0400 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH v9 36/43] ext4: Don't allow unmapped identifiers in richacls Date: Mon, 5 Oct 2015 21:37:03 +0200 Message-Id: <1444073830-21854-37-git-send-email-agruenba@redhat.com> In-Reply-To: <1444073830-21854-1-git-send-email-agruenba@redhat.com> References: <1444073830-21854-1-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 83b7a95..4ef140e 100644 --- a/fs/ext4/richacl.c +++ b/fs/ext4/richacl.c @@ -63,8 +63,13 @@ __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