From 11a7b371b64ef39fc5fb1b6f2218eef7c4d035e3 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Date: Sat, 29 Jan 2011 18:43:42 +0530
Subject: [PATCH] fs: allow AT_EMPTY_PATH in linkat(), limit that to
 CAP_DAC_READ_SEARCH

We don't want to allow creation of private hardlinks by different application
using the fd passed to them via SCM_RIGHTS. So limit the null relative name
usage in linkat syscall to CAP_DAC_READ_SEARCH

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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