| diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c |
| index 44de79a75..8e35b33ee 100644 |
| --- a/third_party/libopenjpeg20/j2k.c |
| +++ b/third_party/libopenjpeg20/j2k.c |
| @@ -8914,6 +8914,12 @@ static OPJ_BOOL opj_j2k_update_image_data(opj_tcd_t * p_tcd, OPJ_BYTE * p_data, |
| * */ |
| assert(l_res->x0 >= 0); |
| assert(l_res->x1 >= 0); |
| + |
| + /* Prevent bad casting to unsigned values in the subsequent lines. */ |
| + if ( l_res->x0 < 0 || l_res->x1 < 0 || l_res->y0 < 0 || l_res->y1 < 0 ) { |
| + return OPJ_FALSE; |
| + } |
| + |
| if (l_x0_dest < (OPJ_UINT32)l_res->x0) { |
| l_start_x_dest = (OPJ_UINT32)l_res->x0 - l_x0_dest; |
| l_offset_x0_src = 0; |