static int mif_process_cmpt(mif_hdr_t *hdr, char *buf)
{
	jas_tvparser_t *tvp;
	mif_cmpt_t *cmpt;
	int id;

	cmpt = 0;
	tvp = 0;

	if (!(cmpt = mif_cmpt_create())) {
		goto error;
	}
	cmpt->tlx = 0;
	cmpt->tly = 0;
	cmpt->sampperx = 0;
	cmpt->samppery = 0;
	cmpt->width = 0;
	cmpt->height = 0;
	cmpt->prec = 0;
	cmpt->sgnd = -1;
	cmpt->data = 0;

	if (!(tvp = jas_tvparser_create(buf))) {
		goto error;
	}
	while (!(id = jas_tvparser_next(tvp))) {
		switch (jas_taginfo_nonull(jas_taginfos_lookup(mif_tags,
		  jas_tvparser_gettag(tvp)))->id) {
		case MIF_TLX:
			cmpt->tlx = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_TLY:
			cmpt->tly = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_WIDTH:
			cmpt->width = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_HEIGHT:
			cmpt->height = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_HSAMP:
			cmpt->sampperx = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_VSAMP:
			cmpt->samppery = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_PREC:
			cmpt->prec = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_SGND:
			cmpt->sgnd = atoi(jas_tvparser_getval(tvp));
			break;
		case MIF_DATA:
			if (!(cmpt->data = jas_strdup(jas_tvparser_getval(tvp)))) {
				return -1;
			}
 			break;
 		}
 	}
 	if (!cmpt->sampperx || !cmpt->samppery) {
 		goto error;
 	}
 	if (mif_hdr_addcmpt(hdr, hdr->numcmpts, cmpt)) {
 		goto error;
 	}
	jas_tvparser_destroy(tvp);
 	return 0;
 
 error:
	if (cmpt) {
		mif_cmpt_destroy(cmpt);
	}
	if (tvp) {
		jas_tvparser_destroy(tvp);
	}
	return -1;
}

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.