[PATCH] SELinux: fix hard link count for selinuxfs root directory
A further fix is needed for selinuxfs link count management, to ensure that
the count is correct for the parent directory when a subdirectory is
created. This is only required for the root directory currently, but the
code has been updated for the general case.
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index f321c0c..f5d7836 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1166,12 +1166,12 @@
return ret;
}
-static int sel_make_dir(struct super_block *sb, struct dentry *dentry)
+static int sel_make_dir(struct inode *dir, struct dentry *dentry)
{
int ret = 0;
struct inode *inode;
- inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
+ inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
if (!inode) {
ret = -ENOMEM;
goto out;
@@ -1181,6 +1181,8 @@
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inode->i_nlink++;
d_add(dentry, inode);
+ /* bump link count on parent directory, too */
+ dir->i_nlink++;
out:
return ret;
}
@@ -1189,7 +1191,7 @@
{
int ret;
struct dentry *dentry;
- struct inode *inode;
+ struct inode *inode, *root_inode;
struct inode_security_struct *isec;
static struct tree_descr selinux_files[] = {
@@ -1212,13 +1214,15 @@
if (ret)
goto err;
+ root_inode = sb->s_root->d_inode;
+
dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME);
if (!dentry) {
ret = -ENOMEM;
goto err;
}
- ret = sel_make_dir(sb, dentry);
+ ret = sel_make_dir(root_inode, dentry);
if (ret)
goto err;
@@ -1250,7 +1254,7 @@
goto err;
}
- ret = sel_make_dir(sb, dentry);
+ ret = sel_make_dir(root_inode, dentry);
if (ret)
goto err;