leak in hostfs_unlink()

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/hostfs/hostfs_kern.c

@@ -622,11 +622,12 @@ int hostfs_unlink(struct inode *ino, struct dentry *dentry)
 	char *file;
 	int err;
 
-	if ((file = dentry_name(dentry)) == NULL)
-		return -ENOMEM;
 	if (append)
 		return -EPERM;
 
+	if ((file = dentry_name(dentry)) == NULL)
+		return -ENOMEM;
+
 	err = unlink_file(file);
 	__putname(file);
 	return err;