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authorMimi Zohar <zohar@linux.vnet.ibm.com>2009-02-04 09:06:57 -0500
committerJames Morris <jmorris@namei.org>2009-02-06 09:05:30 +1100
commit6146f0d5e47ca4047ffded0fb79b6c25359b386c (patch)
treeedd792e52ad56d4a5d3ac6caa8437d3283fc157e /fs
parent659aaf2bb5496a425ba14036b5b5900f593e4484 (diff)
integrity: IMA hooks
This patch replaces the generic integrity hooks, for which IMA registered itself, with IMA integrity hooks in the appropriate places directly in the fs directory. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/exec.c10
-rw-r--r--fs/file_table.c2
-rw-r--r--fs/inode.c24
-rw-r--r--fs/namei.c8
4 files changed, 37 insertions, 7 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 02d2e120542d..9c789a525cc4 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -45,6 +45,7 @@
#include <linux/proc_fs.h>
#include <linux/mount.h>
#include <linux/security.h>
+#include <linux/ima.h>
#include <linux/syscalls.h>
#include <linux/tsacct_kern.h>
#include <linux/cn_proc.h>
@@ -130,6 +131,9 @@ asmlinkage long sys_uselib(const char __user * library)
error = vfs_permission(&nd, MAY_READ | MAY_EXEC | MAY_OPEN);
if (error)
goto exit;
+ error = ima_path_check(&nd.path, MAY_READ | MAY_EXEC | MAY_OPEN);
+ if (error)
+ goto exit;
file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);
error = PTR_ERR(file);
@@ -683,6 +687,9 @@ struct file *open_exec(const char *name)
err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);
if (err)
goto out_path_put;
+ err = ima_path_check(&nd.path, MAY_EXEC | MAY_OPEN);
+ if (err)
+ goto out_path_put;
file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);
if (IS_ERR(file))
@@ -1209,6 +1216,9 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
retval = security_bprm_check(bprm);
if (retval)
return retval;
+ retval = ima_bprm_check(bprm);
+ if (retval)
+ return retval;
/* kernel module loader fixup */
/* so we don't try to load run modprobe in kernel space. */
diff --git a/fs/file_table.c b/fs/file_table.c
index 0fbcacc3ea75..55895ccc08c6 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/security.h>
+#include <linux/ima.h>
#include <linux/eventpoll.h>
#include <linux/rcupdate.h>
#include <linux/mount.h>
@@ -276,6 +277,7 @@ void __fput(struct file *file)
if (file->f_op && file->f_op->release)
file->f_op->release(inode, file);
security_file_free(file);
+ ima_file_free(file);
if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL))
cdev_put(inode->i_cdev);
fops_put(file->f_op);
diff --git a/fs/inode.c b/fs/inode.c
index 098a2443196f..ed22b14f2202 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -17,6 +17,7 @@
#include <linux/hash.h>
#include <linux/swap.h>
#include <linux/security.h>
+#include <linux/ima.h>
#include <linux/pagemap.h>
#include <linux/cdev.h>
#include <linux/bootmem.h>
@@ -144,13 +145,13 @@ struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_cdev = NULL;
inode->i_rdev = 0;
inode->dirtied_when = 0;
- if (security_inode_alloc(inode)) {
- if (inode->i_sb->s_op->destroy_inode)
- inode->i_sb->s_op->destroy_inode(inode);
- else
- kmem_cache_free(inode_cachep, (inode));
- return NULL;
- }
+
+ if (security_inode_alloc(inode))
+ goto out_free_inode;
+
+ /* allocate and initialize an i_integrity */
+ if (ima_inode_alloc(inode))
+ goto out_free_security;
spin_lock_init(&inode->i_lock);
lockdep_set_class(&inode->i_lock, &sb->s_type->i_lock_key);
@@ -186,6 +187,15 @@ struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_mapping = mapping;
return inode;
+
+out_free_security:
+ security_inode_free(inode);
+out_free_inode:
+ if (inode->i_sb->s_op->destroy_inode)
+ inode->i_sb->s_op->destroy_inode(inode);
+ else
+ kmem_cache_free(inode_cachep, (inode));
+ return NULL;
}
EXPORT_SYMBOL(inode_init_always);
diff --git a/fs/namei.c b/fs/namei.c
index af3783fff1de..734f2b5591bf 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -24,6 +24,7 @@
#include <linux/fsnotify.h>
#include <linux/personality.h>
#include <linux/security.h>
+#include <linux/ima.h>
#include <linux/syscalls.h>
#include <linux/mount.h>
#include <linux/audit.h>
@@ -860,6 +861,8 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
err = exec_permission_lite(inode);
if (err == -EAGAIN)
err = vfs_permission(nd, MAY_EXEC);
+ if (!err)
+ err = ima_path_check(&nd->path, MAY_EXEC);
if (err)
break;
@@ -1525,6 +1528,11 @@ int may_open(struct nameidata *nd, int acc_mode, int flag)
error = vfs_permission(nd, acc_mode);
if (error)
return error;
+
+ error = ima_path_check(&nd->path,
+ acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
+ if (error)
+ return error;
/*
* An append-only file must be opened in append mode for writing.
*/