[PATCH] d_alloc_root() fixes: cramfs

 - inode leak on d_alloc_root() failure
 - unchecked result of d_alloc_root() leading to oops in fs/super.c

fs/cramfs/inode.c

@@ -199,6 +199,7 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
 	struct cramfs_super super;
 	unsigned long root_offset;
 	struct cramfs_sb_info *sbi;
+	struct inode *root;
 
 	sbi = kmalloc(sizeof(struct cramfs_sb_info), GFP_KERNEL);
 	if (!sbi)
@@ -263,7 +264,14 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	/* Set it all up.. */
 	sb->s_op = &cramfs_ops;
-	sb->s_root = d_alloc_root(get_cramfs_inode(sb, &super.root));
+	root = get_cramfs_inode(sb, &super.root);
+	if (!root)
+		goto out;
+	sb->s_root = d_alloc_root(root);
+	if (!sb->s_root) {
+		iput(root);
+		goto out;
+	}
 	return 0;
 out:
 	kfree(sbi);