Fix ext2 buffer overflow in r2_sbu_grub_memmove
static int _server_handle_qC(libgdbr_t *g, int (*cmd_cb) (void*, const char*, char*, size_t), void *core_ptr) {
	char *buf;
	int ret;
	size_t buf_len = 80;
	if ((ret = send_ack (g)) < 0) {
		return -1;
	}
	if (!(buf = malloc (buf_len))) {
		return -1;
	}
	if ((ret = cmd_cb (core_ptr, "dp", buf, buf_len)) < 0) {
		free (buf);
		return -1;
	}
	ret = send_msg (g, buf);
	free (buf);
	return ret;
}

static int _server_handle_qC(libgdbr_t *g, int (*cmd_cb) (void*, const char*, char*, size_t), void *core_ptr) {
	char *buf;
	int ret;
	size_t buf_len = 80;
	if ((ret = send_ack (g)) < 0) {
		return -1;
	}
	if (!(buf = malloc (buf_len))) {
		return -1;
	}
	if ((ret = cmd_cb (core_ptr, "dp", buf, buf_len)) < 0) {
		free (buf);
		return -1;
	}
	ret = send_msg (g, buf);
	free (buf);
	return ret;
}
