linux-kernel - [PATCH v5 16/21] evm: add evm_inode_post

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Date:	Mon, 16 May 2011 10:45:10 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	linux-security-module@...r.kernel.org
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>, xfs@....sgi.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>,
	Alex Elder <aelder@....com>, Mimi Zohar <zohar@...ibm.com>
Subject: [PATCH v5 16/21] evm: add evm_inode_post_init call in xfs

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/xfs/linux-2.6/xfs_iops.c |   27 +++++++++++++++++++--------
 1 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index dd21784..01b354d 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -46,6 +46,7 @@
 #include <linux/namei.h>
 #include <linux/posix_acl.h>
 #include <linux/security.h>
+#include <linux/evm.h>
 #include <linux/fiemap.h>
 #include <linux/slab.h>
 
@@ -106,23 +107,33 @@ xfs_init_security(
 	const struct qstr *qstr)
 {
 	struct xfs_inode *ip = XFS_I(inode);
-	size_t		length;
-	void		*value;
-	unsigned char	*name;
+	struct xattr lsm_xattr;
+	struct xattr evm_xattr;
 	int		error;
 
-	error = security_inode_init_security(inode, dir, qstr, (char **)&name,
-					     &value, &length);
+	error = security_inode_init_security(inode, dir, qstr, &lsm_xattr.name,
+					     &lsm_xattr.value,
+					     &lsm_xattr.value_len);
 	if (error) {
 		if (error == -EOPNOTSUPP)
 			return 0;
 		return -error;
 	}
 
-	error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
+	error = xfs_attr_set(ip, lsm_xattr.name, lsm_xattr.value,
+			     lsm_xattr.value_len, ATTR_SECURE);
+	if (error)
+		goto out;
 
-	kfree(name);
-	kfree(value);
+	error = evm_inode_post_init_security(inode, &lsm_xattr, &evm_xattr);
+	if (error)
+		goto out;
+	error = xfs_attr_set(ip, evm_xattr.name, evm_xattr.value,
+			     evm_xattr.value_len, ATTR_SECURE);
+	kfree(evm_xattr.value);
+out:
+	kfree(lsm_xattr.name);
+	kfree(lsm_xattr.value);
 	return error;
 }
 
-- 
1.7.3.4

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