|  | diff --git a/third_party/libopenjpeg/tcd.c b/third_party/libopenjpeg/tcd.c | 
|  | index 4c728d4c6..b9f571410 100644 | 
|  | --- a/third_party/libopenjpeg/tcd.c | 
|  | +++ b/third_party/libopenjpeg/tcd.c | 
|  | @@ -1094,6 +1094,9 @@ static INLINE OPJ_BOOL opj_tcd_init_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no, | 
|  | l_current_precinct->ch = (OPJ_UINT32)((brcblkyend - tlcblkystart) >> | 
|  | cblkheightexpn); | 
|  |  | 
|  | +                    if (l_current_precinct->cw && ((OPJ_UINT32)-1) / l_current_precinct->cw < l_current_precinct->ch) { | 
|  | +                        return OPJ_FALSE; | 
|  | +                    } | 
|  | l_nb_code_blocks = l_current_precinct->cw * l_current_precinct->ch; | 
|  | /*fprintf(stderr, "\t\t\t\t precinct_cw = %d x recinct_ch = %d\n",l_current_precinct->cw, l_current_precinct->ch);      */ | 
|  | if ((((OPJ_UINT32) - 1) / (OPJ_UINT32)sizeof_block) < |