1 diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c 2 index b20f219..9056feb 100644 3 --- a/third_party/libopenjpeg20/j2k.c 4 +++ b/third_party/libopenjpeg20/j2k.c 5 @@ -8211,6 +8211,12 @@ static OPJ_BOOL opj_j2k_update_image_data (opj_tcd_t * p_tcd, OPJ_BYTE * p_data, 6 * */ 7 assert( l_res->x0 >= 0); 8 assert( l_res->x1 >= 0); 9 + 10 + /* Prevent bad casting to unsigned values in the subsequent lines. */ 11 + if ( l_res->x0 < 0 || l_res->x1 < 0 || l_res->y0 < 0 || l_res->y1 < 0 ) { 12 + return OPJ_FALSE; 13 + } 14 + 15 if ( l_x0_dest < (OPJ_UINT32)l_res->x0 ) { 16 l_start_x_dest = (OPJ_UINT32)l_res->x0 - l_x0_dest; 17 l_offset_x0_src = 0; 18
