Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753306AbdGYUQt (ORCPT ); Tue, 25 Jul 2017 16:16:49 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:35158 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753211AbdGYTWV (ORCPT ); Tue, 25 Jul 2017 15:22:21 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, reiserfs-devel@vger.kernel.org, Jan Kara Subject: [PATCH 4.9 122/125] reiserfs: Dont clear SGID when inheriting ACLs Date: Tue, 25 Jul 2017 12:20:37 -0700 Message-Id: <20170725192020.989072075@linuxfoundation.org> X-Mailer: git-send-email 2.13.3 In-Reply-To: <20170725192014.314851996@linuxfoundation.org> References: <20170725192014.314851996@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2009 Lines: 59 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kara commit 6883cd7f68245e43e91e5ee583b7550abf14523f upstream. When new directory 'DIR1' is created in a directory 'DIR0' with SGID bit set, DIR1 is expected to have SGID bit set (and owning group equal to the owning group of 'DIR0'). However when 'DIR0' also has some default ACLs that 'DIR1' inherits, setting these ACLs will result in SGID bit on 'DIR1' to get cleared if user is not member of the owning group. Fix the problem by moving posix_acl_update_mode() out of __reiserfs_set_acl() into reiserfs_set_acl(). That way the function will not be called when inheriting ACLs which is what we want as it prevents SGID bit clearing and the mode has been properly set by posix_acl_create() anyway. Fixes: 073931017b49d9458aa351605b43a7e34598caef CC: reiserfs-devel@vger.kernel.org Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- fs/reiserfs/xattr_acl.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -37,7 +37,14 @@ reiserfs_set_acl(struct inode *inode, st error = journal_begin(&th, inode->i_sb, jcreate_blocks); reiserfs_write_unlock(inode->i_sb); if (error == 0) { + if (type == ACL_TYPE_ACCESS && acl) { + error = posix_acl_update_mode(inode, &inode->i_mode, + &acl); + if (error) + goto unlock; + } error = __reiserfs_set_acl(&th, inode, type, acl); +unlock: reiserfs_write_lock(inode->i_sb); error2 = journal_end(&th); reiserfs_write_unlock(inode->i_sb); @@ -241,11 +248,6 @@ __reiserfs_set_acl(struct reiserfs_trans switch (type) { case ACL_TYPE_ACCESS: name = XATTR_NAME_POSIX_ACL_ACCESS; - if (acl) { - error = posix_acl_update_mode(inode, &inode->i_mode, &acl); - if (error) - return error; - } break; case ACL_TYPE_DEFAULT: name = XATTR_NAME_POSIX_ACL_DEFAULT;