linux-kernel - [PATCH v5 13/21] evm: add evm_inode_post

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Message-Id: <1305557115-15652-14-git-send-email-zohar@linux.vnet.ibm.com>
Date:	Mon, 16 May 2011 10:45:07 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	linux-security-module@...r.kernel.org
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>, cluster-devel@...hat.com,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	James Morris <jmorris@...ei.org>,
	David Safford <safford@...son.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Dmitry Kasatkin <dmitry.kasatkin@...ia.com>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Mimi Zohar <zohar@...ibm.com>
Subject: [PATCH v5 13/21] evm: add evm_inode_post_init call in gfs2

After creating the initial LSM security extended attribute, call
evm_inode_post_init_security() to create the 'security.evm'
extended attribute.

Signed-off-by: Mimi Zohar <zohar@...ibm.com>
---
 fs/gfs2/inode.c |   28 +++++++++++++++++++---------
 1 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 97d54a2..5ce875b 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -17,6 +17,7 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/crc32.h>
 #include <linux/security.h>
+#include <linux/evm.h>
 #include <linux/time.h>
 
 #include "gfs2.h"
@@ -767,12 +768,12 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
 			      const struct qstr *qstr)
 {
 	int err;
-	size_t len;
-	void *value;
-	char *name;
+	struct xattr lsm_xattr;
+	struct xattr evm_xattr;
 
 	err = security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr,
-					   &name, &value, &len);
+					   &lsm_xattr.name, &lsm_xattr.value,
+					   &lsm_xattr.value_len);
 
 	if (err) {
 		if (err == -EOPNOTSUPP)
@@ -780,11 +781,20 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
 		return err;
 	}
 
-	err = __gfs2_xattr_set(&ip->i_inode, name, value, len, 0,
-			       GFS2_EATYPE_SECURITY);
-	kfree(value);
-	kfree(name);
-
+	err = __gfs2_xattr_set(&ip->i_inode, lsm_xattr.name, lsm_xattr.value,
+			       lsm_xattr.value_len, 0, GFS2_EATYPE_SECURITY);
+	if (err < 0)
+		goto out;
+	err = evm_inode_post_init_security(&ip->i_inode, &lsm_xattr,
+					   &evm_xattr);
+	if (err)
+		goto out;
+	err = __gfs2_xattr_set(&ip->i_inode, evm_xattr.name, evm_xattr.value,
+			       evm_xattr.value_len, 0, GFS2_EATYPE_SECURITY);
+	kfree(evm_xattr.value);
+out:
+	kfree(lsm_xattr.name);
+	kfree(lsm_xattr.value);
 	return err;
 }
 
-- 
1.7.3.4

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