static int common_perm_dir_dentry(int op, struct path *dir,
				  struct dentry *dentry, u32 mask,
				  struct path_cond *cond)
{
	struct path path = { dir->mnt, dentry };

	return common_perm(op, &path, mask, cond);
}

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.