From: "Serge E. Hallyn" <serue@us.ibm.com>
To: lkml <linux-kernel@vger.kernel.org>, containers@lists.osdl.org
Subject: [PATCH 4/8] user ns: hook permission
Date: Tue, 19 Dec 2006 17:00:51 -0600 [thread overview]
Message-ID: <20061219230051.GE25904@sergelap.austin.ibm.com> (raw)
In-Reply-To: <20061219225902.GA25904@sergelap.austin.ibm.com>
From: Serge E. Hallyn <serue@us.ibm.com>
Subject: [PATCH 4/8] user ns: hook permission
Hook permission to check vfsmnt->user_ns against current.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
---
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
next prev parent reply other threads:[~2006-12-19 23:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-19 22:59 [PATCH 0/8] user namespace: Introduction Serge E. Hallyn
2006-12-19 22:59 ` [PATCH 1/8] nsproxy: externalizes exit_task_namespaces Serge E. Hallyn
2006-12-19 23:00 ` [PATCH 2/8] user ns: add the framework Serge E. Hallyn
2006-12-19 23:00 ` [PATCH 3/8] user ns: add user_namespace ptr to vfsmount Serge E. Hallyn
2006-12-19 23:00 ` Serge E. Hallyn [this message]
2007-01-24 17:06 ` [PATCH 4/8] user ns: hook permission Eric W. Biederman
2007-01-24 19:06 ` Serge E. Hallyn
2006-12-19 23:01 ` [PATCH 5/8] user ns: prepare copy_tree, copy_mnt, and their callers to handle errs Serge E. Hallyn
2006-12-19 23:01 ` [PATCH 6/8] user ns: implement shared mounts Serge E. Hallyn
2006-12-19 23:01 ` [PATCH 7/8] user ns: handle file sigio Serge E. Hallyn
2007-01-24 17:23 ` Eric W. Biederman
2007-01-24 18:58 ` Serge E. Hallyn
2007-01-25 8:12 ` Andrew Morton
2007-01-25 15:32 ` Serge E. Hallyn
2007-01-26 5:38 ` Serge E. Hallyn
2007-01-26 6:09 ` Andrew Morton
2006-12-19 23:01 ` [PATCH 8/8] user ns: implement user ns unshare Serge E. Hallyn
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