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Subject[PATCH v6 09/20] fs: add evm_inode_post_init calls
Date
After creating the initial LSM security extended attribute, call
evm_inode_post_init_security() to create the 'security.evm'
extended attribute.

(Support for other fs are defined as separate patches.)

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
---
fs/ext2/xattr_security.c | 31 ++++++++++++++++++++++++-------
fs/ext3/xattr_security.c | 30 +++++++++++++++++++++++-------
fs/ext4/xattr_security.c | 30 +++++++++++++++++++++++-------
3 files changed, 70 insertions(+), 21 deletions(-)

diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index 5d979b4..e17820c 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -9,6 +9,7 @@
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/security.h>
+#include <linux/evm.h>
#include "xattr.h"

static size_t
@@ -51,21 +52,37 @@ ext2_init_security(struct inode *inode, struct inode *dir,
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(inode, dir, qstr, &name, &value, &len);
+ err = security_inode_init_security(inode, dir, qstr, &lsm_xattr.name,
+ &lsm_xattr.value,
+ &lsm_xattr.value_len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
- name, value, len, 0);
- kfree(name);
- kfree(value);
+ lsm_xattr.name, lsm_xattr.value,
+ lsm_xattr.value_len, 0);
+ if (err < 0)
+ goto out;
+
+ err = evm_inode_post_init_security(inode, &lsm_xattr, &evm_xattr);
+ if (err)
+ goto out;
+ err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
+ evm_xattr.name, evm_xattr.value,
+ evm_xattr.value_len, 0);
+ kfree(evm_xattr.value);
+out:
+ kfree(lsm_xattr.name);
+ kfree(lsm_xattr.value);
+ if (err == -EOPNOTSUPP)
+ return 0;
return err;
+
}

const struct xattr_handler ext2_xattr_security_handler = {
diff --git a/fs/ext3/xattr_security.c b/fs/ext3/xattr_security.c
index b8d9f83..844786b 100644
--- a/fs/ext3/xattr_security.c
+++ b/fs/ext3/xattr_security.c
@@ -10,6 +10,7 @@
#include <linux/ext3_jbd.h>
#include <linux/ext3_fs.h>
#include <linux/security.h>
+#include <linux/evm.h>
#include "xattr.h"

static size_t
@@ -53,20 +54,35 @@ ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
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(inode, dir, qstr, &name, &value, &len);
+ err = security_inode_init_security(inode, dir, qstr, &lsm_xattr.name,
+ &lsm_xattr.value,
+ &lsm_xattr.value_len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
- name, value, len, 0);
- kfree(name);
- kfree(value);
+ lsm_xattr.name, lsm_xattr.value,
+ lsm_xattr.value_len, 0);
+ if (err < 0)
+ goto out;
+
+ err = evm_inode_post_init_security(inode, &lsm_xattr, &evm_xattr);
+ if (err)
+ goto out;
+ err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
+ evm_xattr.name, evm_xattr.value,
+ evm_xattr.value_len, 0);
+ kfree(evm_xattr.value);
+out:
+ kfree(lsm_xattr.name);
+ kfree(lsm_xattr.value);
+ if (err == -EOPNOTSUPP)
+ return 0;
return err;
}

diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index 007c3bf..c5fdb96 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -8,6 +8,7 @@
#include <linux/fs.h>
#include <linux/security.h>
#include <linux/slab.h>
+#include <linux/evm.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include "xattr.h"
@@ -53,20 +54,35 @@ ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
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(inode, dir, qstr, &name, &value, &len);
+ err = security_inode_init_security(inode, dir, qstr, &lsm_xattr.name,
+ &lsm_xattr.value,
+ &lsm_xattr.value_len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_SECURITY,
- name, value, len, 0);
- kfree(name);
- kfree(value);
+ lsm_xattr.name, lsm_xattr.value,
+ lsm_xattr.value_len, 0);
+ if (err < 0)
+ goto out;
+
+ err = evm_inode_post_init_security(inode, &lsm_xattr, &evm_xattr);
+ if (err)
+ goto out;
+ err = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_SECURITY,
+ evm_xattr.name, evm_xattr.value,
+ evm_xattr.value_len, 0);
+ kfree(evm_xattr.value);
+out:
+ kfree(lsm_xattr.name);
+ kfree(lsm_xattr.value);
+ if (err == -EOPNOTSUPP)
+ return 0;
return err;
}

--
1.7.3.4


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