static int common_mmap(int op, struct file *file, unsigned long prot,
		       unsigned long flags)
{
	struct dentry *dentry;
	int mask = 0;

	if (!file || !file->f_security)
		return 0;

	if (prot & PROT_READ)
		mask |= MAY_READ;
	/*
	 * Private mappings don't require write perms since they don't
	 * write back to the files
	 */
	if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE))
		mask |= MAY_WRITE;
	if (prot & PROT_EXEC)
		mask |= AA_EXEC_MMAP;

	dentry = file->f_path.dentry;
	return common_file_perm(op, file, mask);
}

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.