void __validate_process_creds(struct task_struct *tsk,
			      const char *file, unsigned line)
{
	if (tsk->cred == tsk->real_cred) {
		if (unlikely(read_cred_subscribers(tsk->cred) < 2 ||
			     creds_are_invalid(tsk->cred)))
			goto invalid_creds;
	} else {
		if (unlikely(read_cred_subscribers(tsk->real_cred) < 1 ||
			     read_cred_subscribers(tsk->cred) < 1 ||
			     creds_are_invalid(tsk->real_cred) ||
			     creds_are_invalid(tsk->cred)))
			goto invalid_creds;
	}
	return;

invalid_creds:
	printk(KERN_ERR "CRED: Invalid process credentials\n");
	printk(KERN_ERR "CRED: At %s:%u\n", file, line);

	dump_invalid_creds(tsk->real_cred, "Real", tsk);
	if (tsk->cred != tsk->real_cred)
		dump_invalid_creds(tsk->cred, "Effective", tsk);
	else
		printk(KERN_ERR "CRED: Effective creds == Real creds\n");
	BUG();
}

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.