[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070104181154.GE11377@sergelap.austin.ibm.com>
Date: Thu, 4 Jan 2007 12:11:54 -0600
From: "Serge E. Hallyn" <serue@...ibm.com>
To: Andrew Morton <akpm@...l.org>
Cc: lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH -mm 4/8] user ns: hook permission
From: Serge E. Hallyn <serue@...ibm.com>
Subject: [PATCH -mm 4/8] user ns: hook permission
Hook permission to check vfsmnt->user_ns against current.
Signed-off-by: Serge E. Hallyn <serue@...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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists