blob: 697c48f18b0f1605ea02c4b94993ab16de46e6e4 [file] [log] [blame]
diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c
index b20f219..9056feb 100644
--- a/third_party/libopenjpeg20/j2k.c
+++ b/third_party/libopenjpeg20/j2k.c
@@ -8211,6 +8211,12 @@ 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;