Fix Heap Buffer Overflow in function color_cmyk_to_rgb

Fix uclouvain#774

Author: mayeut

src/bin/common/color.c

@@ -855,7 +855,14 @@ void color_cmyk_to_rgb(opj_image_t *image)
 	w = image->comps[0].w;
 	h = image->comps[0].h;
 
-	if(image->numcomps < 4) return;
+	if (
+			(image->numcomps < 4)
+		 || (image->comps[0].dx != image->comps[1].dx) || (image->comps[0].dx != image->comps[2].dx) || (image->comps[0].dx != image->comps[3].dx)
+		 || (image->comps[0].dy != image->comps[1].dy) || (image->comps[0].dy != image->comps[2].dy) || (image->comps[0].dy != image->comps[3].dy)
+			) {
+		fprintf(stderr,"%s:%d:color_cmyk_to_rgb\n\tCAN NOT CONVERT\n", __FILE__,__LINE__);
+		return;
+	}
 
 	max = w * h;
 

tests/nonregression/test_suite.ctest.in

@@ -559,3 +559,5 @@ opj_decompress -i @INPUT_NR_PATH@/basn6a08.jp2 -o @TEMP_PATH@/basn6a08_tif-15.ti
 opj_decompress -i @INPUT_NR_PATH@/issue726.j2k -o @TEMP_PATH@/issue726.png
 # issue 733
 !opj_decompress -i @INPUT_NR_PATH@/issue733.jp2 -o @TEMP_PATH@/issue733.png
+# issue 774
+!opj_decompress -i @INPUT_NR_PATH@/issue774.jp2 -o @TEMP_PATH@/issue774.png