Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933044AbWLSXB6 (ORCPT ); Tue, 19 Dec 2006 18:01:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933056AbWLSXB3 (ORCPT ); Tue, 19 Dec 2006 18:01:29 -0500 Received: from e31.co.us.ibm.com ([32.97.110.149]:40336 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932950AbWLSXAw (ORCPT ); Tue, 19 Dec 2006 18:00:52 -0500 Date: Tue, 19 Dec 2006 17:00:51 -0600 From: "Serge E. Hallyn" To: lkml , containers@lists.osdl.org Subject: [PATCH 4/8] user ns: hook permission Message-ID: <20061219230051.GE25904@sergelap.austin.ibm.com> References: <20061219225902.GA25904@sergelap.austin.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061219225902.GA25904@sergelap.austin.ibm.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1097 Lines: 40 From: Serge E. Hallyn Subject: [PATCH 4/8] user ns: hook permission Hook permission to check vfsmnt->user_ns against current. Signed-off-by: Serge E. Hallyn --- fs/namei.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index e4f108f..d6687af 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -246,6 +246,8 @@ int permission(struct inode *inode, int return -EACCES; } + if (nd && !task_mnt_same_uidns(current, nd->mnt)) + return -EACCES; /* * MAY_EXEC on regular files requires special handling: We override @@ -433,6 +435,8 @@ static int exec_permission_lite(struct i { umode_t mode = inode->i_mode; + if (!task_mnt_same_uidns(current, nd->mnt)) + return -EACCES; if (inode->i_op && inode->i_op->permission) return -EAGAIN; -- 1.4.1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/