1 files changed, 30 insertions, 13 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index ac6fe99bd32c..2fa483f26113 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -65,6 +65,7 @@ static DEFINE_MUTEX(sel_mutex);
 /* global data for booleans */
 static struct dentry *bool_dir = NULL;
 static int bool_num = 0;
+static char **bool_pending_names;
 static int *bool_pending_values = NULL;
 
 /* global data for classes */
@@ -832,11 +833,16 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
 	ssize_t length;
 	ssize_t ret;
 	int cur_enforcing;
-	struct inode *inode;
+	struct inode *inode = filep->f_path.dentry->d_inode;
+	unsigned index = inode->i_ino & SEL_INO_MASK;
+	const char *name = filep->f_path.dentry->d_name.name;
 
 	mutex_lock(&sel_mutex);
 
-	ret = -EFAULT;
+	if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	if (count > PAGE_SIZE) {
 		ret = -EINVAL;
@@ -847,15 +853,13 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
 		goto out;
 	}
 
-	inode = filep->f_path.dentry->d_inode;
-	cur_enforcing = security_get_bool_value(inode->i_ino&SEL_INO_MASK);
+	cur_enforcing = security_get_bool_value(index);
 	if (cur_enforcing < 0) {
 		ret = cur_enforcing;
 		goto out;
 	}
-
 	length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing,
-			  bool_pending_values[inode->i_ino&SEL_INO_MASK]);
+			  bool_pending_values[index]);
 	ret = simple_read_from_buffer(buf, count, ppos, page, length);
 out:
 	mutex_unlock(&sel_mutex);
@@ -868,9 +872,11 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 			      size_t count, loff_t *ppos)
 {
 	char *page = NULL;
-	ssize_t length = -EFAULT;
+	ssize_t length;
 	int new_value;
-	struct inode *inode;
+	struct inode *inode = filep->f_path.dentry->d_inode;
+	unsigned index = inode->i_ino & SEL_INO_MASK;
+	const char *name = filep->f_path.dentry->d_name.name;
 
 	mutex_lock(&sel_mutex);
 
@@ -878,12 +884,19 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 	if (length)
 		goto out;
 
+	if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
+		length = -EINVAL;
+		goto out;
+	}
+
 	if (count >= PAGE_SIZE) {
 		length = -ENOMEM;
 		goto out;
 	}
+
 	if (*ppos != 0) {
 		/* No partial writes. */
+		length = -EINVAL;
 		goto out;
 	}
 	page = (char*)get_zeroed_page(GFP_KERNEL);
@@ -892,6 +905,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 		goto out;
 	}
 
+	length = -EFAULT;
 	if (copy_from_user(page, buf, count))
 		goto out;
 
@@ -902,8 +916,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 	if (new_value)
 		new_value = 1;
 
-	inode = filep->f_path.dentry->d_inode;
-	bool_pending_values[inode->i_ino&SEL_INO_MASK] = new_value;
+	bool_pending_values[index] = new_value;
 	length = count;
 
 out:
@@ -923,7 +936,7 @@ static ssize_t sel_commit_bools_write(struct file *filep,
 				      size_t count, loff_t *ppos)
 {
 	char *page = NULL;
-	ssize_t length = -EFAULT;
+	ssize_t length;
 	int new_value;
 
 	mutex_lock(&sel_mutex);
@@ -946,6 +959,7 @@ static ssize_t sel_commit_bools_write(struct file *filep,
 		goto out;
 	}
 
+	length = -EFAULT;
 	if (copy_from_user(page, buf, count))
 		goto out;
 
@@ -1010,7 +1024,9 @@ static int sel_make_bools(void)
 	u32 sid;
 
 	/* remove any existing files */
+	kfree(bool_pending_names);
 	kfree(bool_pending_values);
+	bool_pending_names = NULL;
 	bool_pending_values = NULL;
 
 	sel_remove_entries(dir);
@@ -1052,16 +1068,17 @@ static int sel_make_bools(void)
 		d_add(dentry, inode);
 	}
 	bool_num = num;
+	bool_pending_names = names;
 	bool_pending_values = values;
 out:
 	free_page((unsigned long)page);
+	return ret;
+err:
 	if (names) {
 		for (i = 0; i < num; i++)
 			kfree(names[i]);
 		kfree(names);
 	}
-	return ret;
-err:
 	kfree(values);
 	sel_remove_entries(dir);
 	ret = -ENOMEM;