static unsigned char asn1_oid_decode(struct asn1_ctx *ctx,
				     unsigned char *eoc,
				     unsigned long **oid,
				     unsigned int *len)
{
	unsigned long subid;
	unsigned int  size;
	unsigned long *optr;

	size = eoc - ctx->pointer + 1;

	/* first subid actually encodes first two subids */
	if (size < 2 || size > ULONG_MAX/sizeof(unsigned long))
		return 0;

	*oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC);
	if (*oid == NULL) {
		if (net_ratelimit())
			printk("OOM in bsalg (%d)\n", __LINE__);
		return 0;
	}

	optr = *oid;

	if (!asn1_subid_decode(ctx, &subid)) {
		kfree(*oid);
		*oid = NULL;
		return 0;
	}

	if (subid < 40) {
		optr [0] = 0;
		optr [1] = subid;
	} else if (subid < 80) {
		optr [0] = 1;
		optr [1] = subid - 40;
	} else {
		optr [0] = 2;
		optr [1] = subid - 80;
	}

	*len = 2;
	optr += 2;

	while (ctx->pointer < eoc) {
		if (++(*len) > size) {
			ctx->error = ASN1_ERR_DEC_BADVALUE;
			kfree(*oid);
			*oid = NULL;
			return 0;
		}

		if (!asn1_subid_decode(ctx, optr++)) {
			kfree(*oid);
			*oid = NULL;
			return 0;
		}
	}
	return 1;
}
static unsigned char asn1_oid_decode(struct asn1_ctx *ctx,
				     unsigned char *eoc,
				     unsigned long **oid,
				     unsigned int *len)
{
	unsigned long subid;
	unsigned int  size;
	unsigned long *optr;

	size = eoc - ctx->pointer + 1;

	 
	if (size < 2 || size > ULONG_MAX/sizeof(unsigned long))
		return 0;

	*oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC);
	if (*oid == NULL) {
		if (net_ratelimit())
			printk("OOM in bsalg (%d)\n", __LINE__);
		return 0;
	}

	optr = *oid;

	if (!asn1_subid_decode(ctx, &subid)) {
		kfree(*oid);
		*oid = NULL;
		return 0;
	}

	if (subid < 40) {
		optr [0] = 0;
		optr [1] = subid;
	} else if (subid < 80) {
		optr [0] = 1;
		optr [1] = subid - 40;
	} else {
		optr [0] = 2;
		optr [1] = subid - 80;
	}

	*len = 2;
	optr += 2;

	while (ctx->pointer < eoc) {
		if (++(*len) > size) {
			ctx->error = ASN1_ERR_DEC_BADVALUE;
			kfree(*oid);
			*oid = NULL;
			return 0;
		}

		if (!asn1_subid_decode(ctx, optr++)) {
			kfree(*oid);
			*oid = NULL;
			return 0;
		}
	}
	return 1;
}