static void isofs_put_super(struct super_block *sb)
{
	struct isofs_sb_info *sbi = ISOFS_SB(sb);

#ifdef CONFIG_JOLIET
	unload_nls(sbi->s_nls_iocharset);
#endif

	kfree(sbi);
	sb->s_fs_info = NULL;
 	return;
 }

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.