static OPJ_BOOL opj_tcd_dc_level_shift_decode(opj_tcd_t *p_tcd)
{
    OPJ_UINT32 compno;
    opj_tcd_tilecomp_t * l_tile_comp = 00;
    opj_tccp_t * l_tccp = 00;
    opj_image_comp_t * l_img_comp = 00;
    opj_tcd_resolution_t* l_res = 00;
    opj_tcd_tile_t * l_tile;
    OPJ_UINT32 l_width, l_height, i, j;
    OPJ_INT32 * l_current_ptr;
    OPJ_INT32 l_min, l_max;
    OPJ_UINT32 l_stride;

    l_tile = p_tcd->tcd_image->tiles;
    l_tile_comp = l_tile->comps;
    l_tccp = p_tcd->tcp->tccps;
    l_img_comp = p_tcd->image->comps;

    for (compno = 0; compno < l_tile->numcomps; compno++) {
        l_res = l_tile_comp->resolutions + l_img_comp->resno_decoded;
        l_width = (OPJ_UINT32)(l_res->x1 - l_res->x0);
        l_height = (OPJ_UINT32)(l_res->y1 - l_res->y0);
        l_stride = (OPJ_UINT32)(l_tile_comp->x1 - l_tile_comp->x0) - l_width;

        assert(l_height == 0 ||
               l_width + l_stride <= l_tile_comp->data_size / l_height); /*MUPDF*/

        if (l_img_comp->sgnd) {
            l_min = -(1 << (l_img_comp->prec - 1));
            l_max = (1 << (l_img_comp->prec - 1)) - 1;
        } else {
            l_min = 0;
            l_max = (OPJ_INT32)((1U << l_img_comp->prec) - 1);
        }

        l_current_ptr = l_tile_comp->data;

        if (l_tccp->qmfbid == 1) {
            for (j = 0; j < l_height; ++j) {
                for (i = 0; i < l_width; ++i) {
                    *l_current_ptr = opj_int_clamp(*l_current_ptr + l_tccp->m_dc_level_shift, l_min,
                                                   l_max);
                    ++l_current_ptr;
                }
                l_current_ptr += l_stride;
            }
        } else {
            for (j = 0; j < l_height; ++j) {
                for (i = 0; i < l_width; ++i) {
                    OPJ_FLOAT32 l_value = *((OPJ_FLOAT32 *) l_current_ptr);
                    OPJ_INT32 l_value_int = (OPJ_INT32)opj_lrintf(l_value);
                    if (l_value > INT_MAX ||
                            (l_value_int > 0 && l_tccp->m_dc_level_shift > 0 &&
                             l_value_int > INT_MAX - l_tccp->m_dc_level_shift)) {
                        *l_current_ptr = l_max;
                    } else {
                        *l_current_ptr = opj_int_clamp(
                                             l_value_int + l_tccp->m_dc_level_shift, l_min, l_max);
                    }
                    ++l_current_ptr;
                }
                l_current_ptr += l_stride;
            }
        }

        ++l_img_comp;
        ++l_tccp;
        ++l_tile_comp;
    }

    return OPJ_TRUE;
}

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.