vbf_beresp2obj(struct busyobj *bo)
{
	unsigned l, l2;
	const char *b;
	uint8_t *bp;
	struct vsb *vary = NULL;
	int varyl = 0;

	l = 0;

	/* Create Vary instructions */
	if (!(bo->fetch_objcore->flags & OC_F_PRIVATE)) {
		varyl = VRY_Create(bo, &vary);
		if (varyl > 0) {
			AN(vary);
			assert(varyl == VSB_len(vary));
			l += PRNDUP((intptr_t)varyl);
		} else if (varyl < 0) {
			/*
			 * Vary parse error
			 * Complain about it, and make this a pass.
			 */
			VSLb(bo->vsl, SLT_Error,
			    "Illegal 'Vary' header from backend, "
			    "making this a pass.");
			bo->uncacheable = 1;
			AZ(vary);
		} else
			/* No vary */
			AZ(vary);
	}

	l2 = http_EstimateWS(bo->beresp,
	    bo->uncacheable ? HTTPH_A_PASS : HTTPH_A_INS);
	l += l2;

	if (bo->uncacheable)
		bo->fetch_objcore->flags |= OC_F_PASS;

	if (!vbf_allocobj(bo, l))
		return (-1);

	if (vary != NULL) {
		AN(ObjSetAttr(bo->wrk, bo->fetch_objcore, OA_VARY, varyl,
			VSB_data(vary)));
		VSB_destroy(&vary);
	}

	AZ(ObjSetU32(bo->wrk, bo->fetch_objcore, OA_VXID, VXID(bo->vsl->wid)));

	/* for HTTP_Encode() VSLH call */
	bo->beresp->logtag = SLT_ObjMethod;

	/* Filter into object */
	bp = ObjSetAttr(bo->wrk, bo->fetch_objcore, OA_HEADERS, l2, NULL);
	AN(bp);
	HTTP_Encode(bo->beresp, bp, l2,
	    bo->uncacheable ? HTTPH_A_PASS : HTTPH_A_INS);

	if (http_GetHdr(bo->beresp, H_Last_Modified, &b))
		AZ(ObjSetDouble(bo->wrk, bo->fetch_objcore, OA_LASTMODIFIED,
		    VTIM_parse(b)));
	else
		AZ(ObjSetDouble(bo->wrk, bo->fetch_objcore, OA_LASTMODIFIED,
		    floor(bo->fetch_objcore->t_origin)));

	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.