struct cred *cred_alloc_blank(void)
{
	struct cred *new;

	new = kmem_cache_zalloc(cred_jar, GFP_KERNEL);
	if (!new)
		return NULL;

#ifdef CONFIG_KEYS
	new->tgcred = kzalloc(sizeof(*new->tgcred), GFP_KERNEL);
	if (!new->tgcred) {
		kmem_cache_free(cred_jar, new);
		return NULL;
	}
	atomic_set(&new->tgcred->usage, 1);
#endif

	atomic_set(&new->usage, 1);
#ifdef CONFIG_DEBUG_CREDENTIALS
	new->magic = CRED_MAGIC;
#endif

	if (security_cred_alloc_blank(new, GFP_KERNEL) < 0)
		goto error;

	return new;

error:
	abort_creds(new);
	return NULL;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.