static int adjust_insn_aux_data(struct bpf_verifier_env *env, u32 prog_len,
				u32 off, u32 cnt)
{
	struct bpf_insn_aux_data *new_data, *old_data = env->insn_aux_data;
	int i;

	if (cnt == 1)
		return 0;
	new_data = vzalloc(sizeof(struct bpf_insn_aux_data) * prog_len);
	if (!new_data)
		return -ENOMEM;
	memcpy(new_data, old_data, sizeof(struct bpf_insn_aux_data) * off);
	memcpy(new_data + off + cnt - 1, old_data + off,
	       sizeof(struct bpf_insn_aux_data) * (prog_len - off - cnt + 1));
	for (i = off; i < off + cnt - 1; i++)
		new_data[i].seen = true;
	env->insn_aux_data = new_data;
	vfree(old_data);
	return 0;
}

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.