1 diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c 2 index ad6e1b86f..bf1cb4f36 100644 3 --- a/third_party/libopenjpeg20/j2k.c 4 +++ b/third_party/libopenjpeg20/j2k.c 5 @@ -9086,6 +9086,12 @@ static OPJ_BOOL opj_j2k_update_image_data(opj_tcd_t * p_tcd, 6 * */ 7 assert(res_x0 >= 0); 8 assert(res_x1 >= 0); 9 + 10 + /* Prevent bad casting to unsigned values in the subsequent lines. */ 11 + if ( res_x0 < 0 || res_x1 < 0 || res_y0 < 0 || res_y1 < 0 ) { 12 + return OPJ_FALSE; 13 + } 14 + 15 if (l_x0_dest < (OPJ_UINT32)res_x0) { 16 l_start_x_dest = (OPJ_UINT32)res_x0 - l_x0_dest; 17 l_offset_x0_src = 0; 18
